class EDict(dict):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.stack = QUndoStack()
def _realSet(self, key, val):
super().__setitem__(key, val)
def __setitem__(self, key, val):
if key in self.keys():
self.stack.push(ModifyCommand(self, key, val))
else:
self.stack.push(AppendCommand(self, key, val))
def undoText(self):
return self.stack.undoText()
def redoText(self):
return self.stack.redoText()
def undo(self):
self.stack.undo()
def redo(self):
self.stack.redo()
class MainWindow(QMainWindow):
_tr = QCoreApplication.translate
def __init__(self, parent=None):
super().__init__(parent) # 调用父类构造函数，创建窗体
self.__scene = None # 创建QGraphicsScene
self.__view = None # 创建图形视图组件
self.ui = Ui_MainWindow() # 创建UI对象
self.ui.setupUi(self) # 构造UI界面
self.operatorFile = OperatorFile(self)
self.__translator = None
title = self.tr("基于Python的图的绘制及相关概念的可视化展示")
self.setWindowTitle(title)
self.ui.nodeDetails.setEnabled(False)
self.ui.edgeDetails.setEnabled(False)
self.ui.actionSave.setEnabled(False)
self.edgeModel = QStandardItemModel(5, 5, self)
self.edgeSelectionModel = QItemSelectionModel(self.edgeModel)
self.edgeModel.dataChanged.connect(self.do_updateEdgeWeight)
self.nodeModel = QStandardItemModel(5, 4, self)
self.nodeSelectionModel = QItemSelectionModel(self.nodeModel)
self.nodeModel.dataChanged.connect(self.do_updateNodeWeight)
self.spinWeight = WeightSpinDelegate(0, 200, 1, self)
self.ui.tabWidget.setVisible(False)
self.ui.tabWidget.clear()
self.ui.tabWidget.setTabsClosable(True)
self.ui.tabWidget.setDocumentMode(True)
self.setCentralWidget(self.ui.tabWidget)
self.setAutoFillBackground(True)
self.__buildStatusBar() # 构造状态栏
self.__buildUndoCommand() # 初始化撤销重做系统
self.__initModeMenu()
self.__lastColumnFlag = Qt.NoItemFlags
self.iniGraphicsSystem()
self.__ItemId = 0 # 绘图项自定义数据的key
self.__ItemDesc = 1 # 绘图项自定义数据的key
self.__nodeNum = 0 # 结点的序号
self.__edgeNum = 0 # 边的序号
self.__textNum = 0
self.lastColumnFlags = (Qt.ItemIsSelectable | Qt.ItemIsUserCheckable
| Qt.ItemIsEnabled)
self.__graph = Graph()
## ==============自定义功能函数============
def nodeNum(self):
return self.__nodeNum
def edgeNum(self):
return self.__edgeNum
def scene(self):
self.viewAndScene()
return self.__scene
def view(self):
self.viewAndScene()
return self.__view
def graph(self):
return self.__graph
def __buildStatusBar(self): ##构造状态栏
self.__labViewCord = QLabel(self._tr("MainWindow", "视图坐标："))
self.__labViewCord.setMinimumWidth(150)
self.ui.statusbar.addWidget(self.__labViewCord)
self.__labSceneCord = QLabel(self._tr("MainWindow", "场景坐标："))
self.__labSceneCord.setMinimumWidth(150)
self.ui.statusbar.addWidget(self.__labSceneCord)
self.__labItemCord = QLabel(self._tr("MainWindow", "图元坐标："))
self.__labItemCord.setMinimumWidth(150)
self.ui.statusbar.addWidget(self.__labItemCord)
self.__labItemInfo = QLabel(self._tr("MainWindow", "图元信息: "))
self.ui.statusbar.addPermanentWidget(self.__labItemInfo)
self.__labModeInfo = QLabel(self._tr("MainWindow", "有向图模式"))
self.ui.statusbar.addPermanentWidget(self.__labModeInfo)
def __buildUndoCommand(self):
self.undoStack = QUndoStack()
self.addAction(self.ui.actionUndo)
self.addAction(self.ui.actionRedo)
self.ui.undoView.setStack(self.undoStack)
def __setItemProperties(self, item, desc): ##item是具体类型的QGraphicsItem
self.__nodeNum = len(self.singleItems(BezierNode))
self.__edgeNum = len(self.singleItems(BezierEdge))
self.__textNum = len(self.singleItems(BezierText))
item.setFlag(QGraphicsItem.ItemIsFocusable)
item.setFlag(QGraphicsItem.ItemIsMovable)
item.setFlag(QGraphicsItem.ItemIsSelectable)
item.setPos(-150 + randint(1, 200), -200 + randint(1, 200))
if type(item) is BezierNode:
newNum = self.checkSort(self.__scene.uniqueIdList(BezierNode))
if newNum is not None:
item.setData(self.__ItemId, newNum)
item.textCp.setPlainText("V" + str(newNum))
else:
item.setData(self.__ItemId, self.__nodeNum)
item.textCp.setPlainText("V" + str(self.__nodeNum))
self.__nodeNum = 1 + self.__nodeNum
elif type(item) is BezierEdge:
newNum = self.checkSort(self.__scene.uniqueIdList(BezierEdge))
if newNum is not None:
item.setData(self.__ItemId, newNum)
item.textCp.setPlainText("e" + str(newNum))
else:
item.setData(self.__ItemId, self.__edgeNum)
item.textCp.setPlainText("e" + str(self.__edgeNum))
self.__edgeNum = 1 + self.__edgeNum
elif type(item) is BezierText:
newNum = self.checkSort(self.__scene.uniqueIdList(BezierText))
if newNum is not None:
item.setData(self.__ItemId, newNum)
else:
item.setData(self.__ItemId, self.__textNum)
self.__textNum = 1 + self.__textNum
item.setData(self.__ItemDesc, desc) # 图件描述
self.__scene.addItem(item)
self.__scene.clearSelection()
item.setSelected(True)
def __setBrushColor(self, item): ##设置填充颜色
color = item.brush().__color()
color = QColorDialog.getColor(color, self,
self._tr("MainWindow", "选择填充颜色"))
if color.isValid():
item.setBrush(QBrush(color))
def __initFileMenu(self):
self.ui.actionOpen.triggered.connect(self.do_open_file)
self.ui.actionSave.triggered.connect(self.do_save_file)
self.ui.actionQuit.triggered.connect(self.close)
def __initModeMenu(self):
modeMenuGroup = QActionGroup(self)
modeMenuGroup.addAction(self.ui.actionDigraph_Mode)
modeMenuGroup.addAction(self.ui.actionRedigraph_Mode)
def __updateEdgeView(self):
edges = self.singleItems(BezierEdge)
if len(edges):
self.ui.edgeDetails.setEnabled(True)
else:
return
edgeColCount = 5
self.edgeModel.clear()
edgeHeaderList = [
self._tr("MainWindow", 'ID'),
self._tr("MainWindow", '始点'),
self._tr("MainWindow", '终点'),
self._tr("MainWindow", '坐标'),
self._tr("MainWindow", '权重')
]
self.edgeModel.setHorizontalHeaderLabels(edgeHeaderList)
self.edgeSelectionModel.currentChanged.connect(self.do_curEdgeChanged)
self.ui.edgeDetails.setModel(self.edgeModel)
self.ui.edgeDetails.setSelectionModel(self.edgeSelectionModel)
self.ui.edgeDetails.verticalHeader().setSectionResizeMode(
QHeaderView.Fixed)
self.ui.edgeDetails.horizontalHeader().setSectionResizeMode(
QHeaderView.ResizeToContents)
self.ui.edgeDetails.horizontalHeader().setSectionResizeMode(
QHeaderView.ResizeToContents)
self.ui.edgeDetails.setAlternatingRowColors(True)
self.edgeModel.setRowCount(len(edges))
self.ui.edgeDetails.setItemDelegateForColumn(4, self.spinWeight)
edges.reverse()
for i in range(len(edges)):
edge: BezierEdge = edges[i]
sourceNode = f'V{edge.sourceNode.data(self.__ItemId)}' if edge.sourceNode else None
destNode = f'V{edge.destNode.data(self.__ItemId)}' if edge.destNode else None
strList = [
f"e{edge.data(self.__ItemId)}", sourceNode, destNode,
f"x:{edge.pos().x()},y:{edge.pos().y()}", f"{edge.weight()}"
]
for j in range(edgeColCount):
item = QStandardItem(strList[j])
if j != edgeColCount - 1:
item.setFlags(self.__lastColumnFlag)
self.edgeModel.setItem(i, j, item)
def __updateNodeView(self):
nodes = self.singleItems(BezierNode)
if len(nodes):
self.ui.nodeDetails.setEnabled(True)
else:
return
nodeColCount = 4
self.nodeModel.clear()
nodeHeaderList = [
self._tr("MainWindow", 'ID'),
self._tr("MainWindow", '边数'),
self._tr("MainWindow", '坐标'),
self._tr("MainWindow", '权重')
]
if self.ui.actionDigraph_Mode.isChecked():
nodeHeaderList.append(self._tr("MainWindow", '出度'))
nodeHeaderList.append(self._tr("MainWindow", '入度'))
nodeColCount += 2
else:
nodeHeaderList.append(self._tr("MainWindow", "度"))
nodeColCount += 1
self.nodeModel.setHorizontalHeaderLabels(nodeHeaderList)
self.nodeModel.setRowCount(len(nodes))
self.nodeSelectionModel.currentChanged.connect(self.do_curNodeChanged)
self.ui.nodeDetails.setModel(self.nodeModel)
self.ui.nodeDetails.setSelectionModel(self.nodeSelectionModel)
self.ui.nodeDetails.verticalHeader().setSectionResizeMode(
QHeaderView.Fixed)
self.ui.nodeDetails.horizontalHeader().setSectionResizeMode(
QHeaderView.ResizeToContents)
self.ui.nodeDetails.setAlternatingRowColors(True)
self.ui.nodeDetails.setItemDelegateForColumn(3, self.spinWeight)
nodes.reverse()
for i in range(len(nodes)):
node: BezierNode = nodes[i]
strList = [
f"V{node.data(self.__ItemId)}",
str(len(node.bezierEdges)),
f"x:{node.pos().x()},y:{node.pos().y()}",
str(node.weight())
]
if self.ui.actionDigraph_Mode.isChecked():
strList.append(
f'{node.degrees(self.ui.actionDigraph_Mode.isChecked())[1]}'
)
strList.append(
f'{node.degrees(self.ui.actionDigraph_Mode.isChecked())[0]}'
)
else:
strList.append(
f'{node.degrees(self.ui.actionDigraph_Mode.isChecked())}')
for j in range(nodeColCount):
item = QStandardItem(strList[j])
if j != 3:
item.setFlags(self.__lastColumnFlag)
self.nodeModel.setItem(i, j, item)
def iniGraphicsSystem(self, name=None): ##初始化 Graphics View系统
scene = GraphicsScene() # 创建QGraphicsScene
view = GraphicsView(self, scene) # 创建图形视图组件
view.mouseMove.connect(self.do_mouseMove) # 鼠标移动
view.mouseClicked.connect(self.do_mouseClicked) # 左键按下
scene.itemMoveSignal.connect(self.do_shapeMoved)
scene.itemLock.connect(self.do_nodeLock)
scene.isHasItem.connect(self.do_checkIsHasItems)
if name:
title = name
else:
text = self.tr('未命名')
title = f'{text}{self.ui.tabWidget.count()}'
curIndex = self.ui.tabWidget.addTab(view, title)
self.ui.tabWidget.setCurrentIndex(curIndex)
self.ui.tabWidget.setVisible(True)
## 4个信号与槽函数的关联
# self.view.mouseDoubleClick.connect(self.do_mouseDoubleClick) # 鼠标双击
# self.view.keyPress.connect(self.do_keyPress) # 左键按下
def singleItems(self, className) -> list:
self.viewAndScene()
return self.__scene.singleItems(className)
def connectGraph(self):
self.__graph.setMode(self.ui.actionDigraph_Mode.isChecked())
items = self.__scene.uniqueItems()
nodeList = []
edgeList = []
if not len(items):
return
for item in items:
if type(item) is BezierNode:
nodeList.append(item)
elif type(item) is BezierEdge:
edgeList.append(item)
for node in nodeList:
self.__graph.addVertex(node.data(self.__ItemId))
badEdgeList = []
for i in range(len(edgeList)):
for edge in edgeList:
edge: BezierEdge
if edge.data(self.__ItemId) == i:
if edge.sourceNode and edge.destNode:
self.__graph.addEdge(
edge.sourceNode.data(self.__ItemId),
edge.destNode.data(self.__ItemId), edge.weight())
else:
badEdgeList.append(edge)
if len(badEdgeList) != 0:
self.disconnectGraph()
string = ""
for x in range(len(badEdgeList)):
demo = "、"
if x == len(badEdgeList) - 1:
demo = ""
string = f'{string}e{badEdgeList[x].data(self.__ItemId)}{demo}'
QMessageBox.warning(
self, self._tr("MainWindow", "连接故障！"),
self._tr("MainWindow", "警告，") + string +
self._tr("MainWindow", "的连接不完整"))
return False
return True
def disconnectGraph(self):
self.__graph.clearAllData()
def viewAndScene(self):
if self.ui.tabWidget.count():
self.__view: GraphicsView = self.ui.tabWidget.currentWidget()
self.__scene = self.__view.scene()
def standardGraphData(self):
mode = int(self.ui.actionDigraph_Mode.isChecked())
nodes = self.__scene.singleItems(BezierNode)
edges = self.__scene.singleItems(BezierEdge)
texts = self.__scene.singleItems(BezierText)
nodeDataList = []
edgeDataList = []
textDataList = []
for node in nodes:
node: BezierNode
data = [
node.data(self.__ItemId),
node.weight(),
node.pos().x(),
node.pos().y()
]
nodeDataList.append(data)
for edge in edges:
edge: BezierEdge
data = [edge.data(self.__ItemId)]
if edge.sourceNode:
data.append(edge.sourceNode.data(self.__ItemId))
else:
data.append(-1)
if edge.destNode:
data.append(edge.destNode.data(self.__ItemId))
else:
data.append(-1)
data = data + [
edge.weight(),
edge.beginCp.point().x(),
edge.beginCp.point().y(),
edge.edge1Cp.point().x(),
edge.edge1Cp.point().y(),
edge.edge2Cp.point().x(),
edge.edge2Cp.point().y(),
edge.endCp.point().x(),
edge.endCp.point().y(),
edge.scenePos().x(),
edge.scenePos().y()
]
edgeDataList.append(data)
for text in texts:
text: BezierText
data = [
text.data(self.__ItemId),
text.toPlainText(),
text.scenePos().x(),
text.scenePos().y()
]
textDataList.append(data)
nodeDataList.reverse()
edgeDataList.reverse()
textDataList.reverse()
return [mode, nodeDataList, edgeDataList, textDataList]
def reverseStandardData(self, excelData):
graphName = excelData[0]
mode = excelData[1]
nodes = []
edges = []
texts = []
self.ui.actionDigraph_Mode.setChecked(bool(mode))
for nodeDetail in excelData[2]:
node = BezierNode()
node.textCp.setPlainText(f"V{nodeDetail[0]}")
node.setData(self.__ItemId, nodeDetail[0])
nodeText = self._tr("MainWindow", "顶点")
node.setData(self.__ItemDesc, nodeText)
if len(nodeDetail) < 3:
for i in range(2):
intRandom = randint(-400, 400)
nodeDetail.append(intRandom)
node.setPos(QPointF(nodeDetail[2], nodeDetail[3]))
node.weightCp.setPlainText(str(nodeDetail[1]))
nodes.append(node)
for edgeDetail in excelData[3]:
edge = BezierEdge()
edge.setData(self.__ItemId, edgeDetail[0])
edge.setData(self.__ItemDesc, "边")
edge.textCp.setPlainText(f"e{edgeDetail[0]}")
edge.weightCp.setPlainText(str(edgeDetail[3]))
if len(edgeDetail) <= 4:
for i in range(10):
intRandom = randint(-400, 400)
edgeDetail.append(intRandom)
edge.setPos(QPointF(edgeDetail[12], edgeDetail[13]))
if edgeDetail[1] >= 0:
for node in nodes:
node: BezierNode
if node.data(self.__ItemId) == edgeDetail[1]:
edge.setSourceNode(node)
node.addBezierEdge(edge, ItemType.SourceType)
line = QLineF(edge.mapFromScene(node.pos()),
edge.edge1Cp.point())
length = line.length()
edgeOffset = QPointF(line.dx() * 10 / length,
line.dy() * 10 / length)
source = edge.mapFromScene(node.pos()) + edgeOffset
edge.setSpecialControlPoint(source,
ItemType.SourceType)
edge.beginCp.setVisible(False)
else:
edge.setSpecialControlPoint(
QPointF(edgeDetail[4], edgeDetail[5]), ItemType.SourceType)
if edgeDetail[2] >= 0:
for node in nodes:
node: BezierNode
if node.data(self.__ItemId) == edgeDetail[2]:
edge.setDestNode(node)
node.addBezierEdge(edge, ItemType.DestType)
line = QLineF(edge.mapFromScene(node.pos()),
edge.edge2Cp.point())
length = line.length()
edgeOffset = QPointF(line.dx() * 10 / length,
line.dy() * 10 / length)
if mode:
dest = edge.mapFromScene(
node.pos()) + edgeOffset * 2.3
else:
dest = edge.mapFromScene(node.pos()) + edgeOffset
edge.setSpecialControlPoint(dest, ItemType.DestType)
edge.endCp.setVisible(False)
else:
edge.setSpecialControlPoint(
QPointF(edgeDetail[10], edgeDetail[11]), ItemType.DestType)
edge.setEdgeControlPoint(QPointF(edgeDetail[6], edgeDetail[7]),
ItemType.SourceType)
edge.setEdgeControlPoint(QPointF(edgeDetail[8], edgeDetail[9]),
ItemType.DestType)
edge.centerCp.setPoint(edge.updateCenterPos())
edges.append(edge)
if len(excelData) <= 4:
return [graphName, nodes + edges]
for textDetail in excelData[4]:
text = BezierText(str(textDetail[1]))
text.setData(self.__ItemId, textDetail[0])
text.setData(self.__ItemDesc, "文本")
text.setPos(textDetail[2], textDetail[3])
texts.append(text)
return [graphName, nodes + edges + texts]
def setTranslator(self, translator, language):
self.__translator = translator
if language == 'EN':
self.ui.actionSetEnglish.setChecked(True)
else:
self.ui.actionSetChinese.setChecked(True)
@classmethod
def checkSort(cls, index: list):
index.sort()
for i in range(len(index)):
if i != index[i]:
return i
# ==============event处理函数==========================
# def closeEvent(self, event): # 退出函数
#
# msgBox = QMessageBox()
# msgBox.setWindowTitle('关闭')
# msgBox.setText("是否保存")
# msgBox.setIcon(QMessageBox.Question)
# btn_Do_notSave = msgBox.addButton('不保存', QMessageBox.AcceptRole)
# btn_cancel = msgBox.addButton('取消', QMessageBox.RejectRole)
# btn_save = msgBox.addButton('保存', QMessageBox.AcceptRole)
# msgBox.setDefaultButton(btn_save)
# msgBox.exec_()
#
# if msgBox.clickedButton() == btn_Do_notSave:
# event.accept()
# elif msgBox.clickedButton() == btn_cancel:
# event.ignore()
# elif msgBox.clickedButton() == btn_save:
# self.do_save_file()
# event.accept()
# def contextMenuEvent(self, event): # 右键菜单功能
# rightMouseMenu = QMenu(self)
#
# rightMouseMenu.addAction(self.ui.actionNew)
# rightMouseMenu.addAction(self.ui.actionOpen)
#
# self.action = rightMouseMenu.exec_(self.mapToGlobal(event.pos()))
# ==========由connectSlotsByName()自动连接的槽函数============
@Slot() # 新建画板
def on_actionNew_triggered(self):
self.iniGraphicsSystem()
@Slot() # 添加边
def on_actionArc_triggered(self): # 添加曲线
item = BezierEdge()
item.setGraphMode(self.ui.actionDigraph_Mode.isChecked())
self.__setItemProperties(item, self._tr("MainWindow", "边"))
self.do_addItem(item)
self.__updateEdgeView()
self.__updateNodeView()
@Slot() # 添加顶点
def on_actionCircle_triggered(self): # 添加原点
self.viewAndScene()
item = BezierNode()
self.__setItemProperties(item, self._tr("MainWindow", "顶点"))
self.do_addItem(item)
self.__updateNodeView()
self.__updateEdgeView()
@Slot() # 添加注释
def on_actionAdd_Annotation_triggered(self):
self.viewAndScene()
strText, OK = QInputDialog.getText(self, self._tr("MainWindow", "输入"),
self._tr("MainWindow", "请输入文字"))
if not OK:
return
item = BezierText(strText)
self.__setItemProperties(item, self._tr("MainWindow", "注释"))
self.do_addItem(item)
@Slot(bool) # 显示和隐藏结点权重
def on_actionShowNodesWeight_toggled(self, check: bool):
nodes = self.__scene.singleItems(BezierNode)
for node in nodes:
node: BezierNode
node.weightCp.setVisible(check)
# if check:
# self.ui.actionShowNodesWeight.setText("隐藏顶点权重")
# else:
# self.ui.actionShowNodesWeight.setText("显示顶点权重")
@Slot(bool) # 显示和隐藏边权重
def on_actionShowEdgesWeight_toggled(self, check: bool):
edges = self.__scene.singleItems(BezierEdge)
for edge in edges:
edge: BezierEdge
edge.weightCp.setVisible(check)
# if check:
# self.ui.actionShowEdgesWeight.setText("隐藏边权重")
# else:
# self.ui.actionShowEdgesWeight.setText("显示边权重")
@Slot(bool) # 显示和隐藏边的控制点
def on_actionHideControlPoint_toggled(self, check: bool):
edges = self.__scene.singleItems(BezierEdge)
for edge in edges:
edge: BezierEdge
for point in edge.pointList:
point.setVisible(check)
if edge.sourceNode:
edge.beginCp.setVisible(False)
if edge.destNode:
edge.endCp.setVisible(False)
@Slot() # 简单通路
def on_actionEasy_Pathway_triggered(self):
self.viewAndScene()
items = self.__scene.nodeList
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "对不起，你没有选择起始节点"))
return
elif len(items) != 2:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "选择的起始点数目不符合要求"))
return
if self.connectGraph():
PathWay = ShowDataWidget(self,
items,
self.__graph,
name=self._tr("MainWindow", "简单通路"))
PathWay.pathSignal.connect(self.do_ShowSelectPath)
if PathWay.easyPath():
PathWay.updateToolWidget()
PathWay.show()
self.disconnectGraph()
@Slot() # 简单回路
def on_actionEasy_Loop_triggered(self):
self.viewAndScene()
items = self.__scene.nodeList
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "对不起，你没有选择起点"))
return
if self.connectGraph():
LoopWay = ShowDataWidget(self,
items,
self.__graph,
name=self._tr("MainWindow", "简单回路"))
LoopWay.pathSignal.connect(self.do_ShowSelectPath)
if LoopWay.easyLoop():
LoopWay.updateToolWidget(mode=1)
LoopWay.show()
self.disconnectGraph()
@Slot() # 初级通路
def on_actionPrimary_Pathway_triggered(self):
items = self.__scene.nodeList
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "对不起，你没有选择起始节点"))
return
elif len(items) != 2:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "选择的起始点数目不符合要求"))
return
if self.connectGraph():
PathWay = ShowDataWidget(self, items, self.__graph, name="初级通路")
PathWay.pathSignal.connect(self.do_ShowSelectPath)
if PathWay.primaryPath():
PathWay.updateToolWidget(path=1)
PathWay.show()
self.disconnectGraph()
@Slot() # 初级回路
def on_actionPrimary_Loop_triggered(self):
items = self.__scene.nodeList
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "对不起，你没有选择起点"))
return
if self.connectGraph():
LoopWay = ShowDataWidget(self,
items,
self.__graph,
name=self._tr("MainWindow", "初级回路"))
LoopWay.pathSignal.connect(self.do_ShowSelectPath)
if LoopWay.primaryLoop():
LoopWay.updateToolWidget(mode=1, path=1)
LoopWay.show()
self.disconnectGraph()
@Slot() # 邻接矩阵 边数
def on_action_EdgeNum_triggered(self):
self.viewAndScene()
items = self.__scene.singleItems(BezierNode)
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "图中没有结点"))
return
if self.connectGraph():
MatrixTable = ShowMatrixWidget(self, self.__graph,
self._tr("MainWindow", "邻接矩阵"), 0)
MatrixTable.show()
@Slot() # 邻接矩阵 权重
def on_actionWeight_triggered(self):
self.viewAndScene()
items = self.__scene.singleItems(BezierNode)
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "图中没有结点"))
return
if self.connectGraph():
if not self.__graph.multipleOrSimple():
MatrixTable = ShowMatrixWidget(self, self.__graph,
self._tr("MainWindow", "邻接矩阵"),
1)
MatrixTable.show()
else:
QMessageBox.information(self, "Sorry", "这个图不是简单图")
self.disconnectGraph()
@Slot() # 可达矩阵
def on_actionReachable_Matrix_triggered(self):
self.viewAndScene()
items = self.__scene.singleItems(BezierNode)
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "图中没有结点"))
return
if self.connectGraph():
MatrixTable = ShowMatrixWidget(self, self.__graph,
self._tr("MainWindow", "可达矩阵"))
MatrixTable.show()
@Slot() # 关联矩阵
def on_actionIncidence_Matrix_Undigraph_triggered(self):
self.viewAndScene()
items = self.__scene.singleItems(BezierNode)
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "图中没有结点"))
return
if self.ui.actionDigraph_Mode.isChecked():
items = self.singleItems(BezierEdge)
badNodeList = []
badNodes = ''
for x in range(len(items)):
if items[x].sourceNode is not None and items[
x].destNode is not None:
if items[x].sourceNode == items[x].destNode:
badNodeList.append(items[x])
demo = "、"
if x == len(items) - 1:
demo = ""
badNodes = f"{badNodes}V{items[x].sourceNode.data(self.__ItemId)}{demo}"
if len(badNodeList):
text = self._tr("MainWindow", '有向图的关联矩阵需要有向图无环,而')
text1 = self._tr("MainWindow", '存在环！')
QMessageBox.warning(self, self._tr("MainWindow", "致命错误"),
f"{text}{badNodes}{text1}")
return
if self.connectGraph():
MatrixTable = ShowMatrixWidget(self, self.__graph,
self._tr("MainWindow", "关联矩阵"))
MatrixTable.show()
@Slot() # 图的连通性
def on_actionConnectivity_triggered(self):
name = ''
if self.connectGraph():
num = self.__graph.connectivity()
if num is False:
name = self._tr("MainWindow", '此图为非连通图')
elif num == 2:
name = self._tr("MainWindow", "此图为单向连通图")
elif num == 3:
name = self._tr("MainWindow", "此图为强连通图")
elif num == 1:
name = self._tr("MainWindow", '此图为连通图')
QMessageBox.information(self, self._tr("MainWindow", "图的连通性"),
name)
self.disconnectGraph()
@Slot() # 完全图判定
def on_actionCompleteGraph_triggered(self):
if self.connectGraph():
edge = self.__graph.completeGraph()
if edge:
name = self._tr("MainWindow", "此图为完全图")
else:
name = self._tr("MainWindow", '此图不是完全图')
QMessageBox.information(self, self._tr("MainWindow", "完全图判定"),
name)
self.disconnectGraph()
@Slot() # 简单图多重图判定
def on_actionMultipleOrSimple_triggered(self):
if self.connectGraph():
edges = self.__graph.multipleOrSimple()
if not edges:
QMessageBox.information(self,
self._tr("MainWindow", "简单图与多重图的判定"),
self._tr("MainWindow", "此图为简单图"))
else:
parallelSides = ShowDataWidget(
self, edges, self.__graph,
self._tr("MainWindow", "简单图与多重图的判定"))
parallelSides.multipleOrSimple()
parallelSides.show()
@Slot() # 最短路径
def on_actionShortestPath_triggered(self):
items = self.__scene.nodeList
if len(items) == 0:
QMessageBox.warning(self, self._tr("MainWindow", "警告"),
self._tr("MainWindow", "对不起，你没有选择结点"))
return
if self.connectGraph():
ShortestPath = ShowDataWidget(self,
items,
self.__graph,
name=self._tr("MainWindow", "最短路径"))
ShortestPath.pathSignal.connect(self.do_ShowSelectPath)
if ShortestPath.shortestPath():
ShortestPath.updateToolWidget(mode=1, path=2)
ShortestPath.show()
@Slot() # 撤销
def on_actionUndo_triggered(self): # 撤销
self.undoStack.undo()
self.__updateEdgeView()
self.__updateNodeView()
@Slot() # 重做
def on_actionRedo_triggered(self): # 重做
self.viewAndScene()
self.undoStack.redo()
self.__updateEdgeView()
self.__updateNodeView()
@Slot() # 帮助
def on_actionHelp_Document_triggered(self):
open("https://github.com/BBlance/Discrete_math.graph_theory")
# @Slot()
# def on_actionPen_Color_triggered(self): # 画笔颜色
# iniColor = self.view.getPenColor()
# color = QColorDialog.getColor(iniColor, self, "选择颜色")
# if color.isValid():
# self.view.setPenColor(color)
# @Slot()
# def on_actionPen_Thickness_triggered(self): # 画笔粗细
# self.viewAndScene()
# iniThickness = self.__view.getPenThickness()
# intPenStyle = self.__view.getPenStyle()
# thicknessDialog = ThicknessDialog(None, self._tr("MainWindow", "画笔粗细与样式"), iniThickness, intPenStyle)
# ret = thicknessDialog.exec_()
# thickness = thicknessDialog.getThickness()
# penStyle = thicknessDialog.getPenStyle()
# self.__view.setPenStyle(penStyle)
# self.__view.setPenThickness(thickness)
@Slot()
def on_actionBackground_Color_triggered(self):
self.viewAndScene()
# iniColor = self.__view.getBackgroundColor()
# color = QColorDialog.getColor(iniColor, self, "选择颜色")
# if color.isValid():
# self.__view.setBackgroundBrush(color)
for item in self.standardGraphData():
print(item)
# @Slot(bool)
# def on_actionProperty_And_History_triggered(self, checked):
# self.ui.dockWidget.setVisible(checked)
@Slot() # 保存文件
def on_actionSave_triggered(self):
self.viewAndScene()
tableName = self.ui.tabWidget.tabText(self.ui.tabWidget.currentIndex())
filename = self.operatorFile.saveGraphData(self.standardGraphData(),
tableName)
if filename:
index = self.ui.tabWidget.currentIndex()
self.ui.tabWidget.setTabText(index, filename.baseName())
@Slot() # 读取文件
def on_actionOpen_triggered(self):
graph = self.operatorFile.openGraphData()
if graph:
graph = self.reverseStandardData(graph)
self.iniGraphicsSystem(graph[0])
for item in graph[1]:
self.__scene.addItem(item)
self.__updateNodeView()
self.__updateEdgeView()
self.__scene.update()
@Slot() # 另存为
def on_actionSave_As_triggered(self):
filename = self.operatorFile.saveExcelAs(self.standardGraphData())
if filename:
index = self.ui.tabWidget.currentIndex()
self.ui.tabWidget.setTabText(index, filename.baseName())
@Slot() # 导出数据
def on_actionOutputData_triggered(self):
data = self.standardGraphData()
data = data[:3]
dataCpoy = [data[0], [], []]
for node in data[1]:
node = node[:2]
dataCpoy[1].append(node)
for edge in data[2]:
edge = edge[:4]
dataCpoy[2].append(edge)
if self.operatorFile.outputData(dataCpoy):
title = self.tr("恭喜")
strInfo = self.tr("数据导出成功")
QMessageBox.information(self, title, strInfo)
@Slot() # 导入数据
def on_actionImportData_triggered(self):
data = self.operatorFile.inputData()
if data:
graph = self.reverseStandardData(data)
self.iniGraphicsSystem(graph[0])
for item in graph[1]:
self.__scene.addItem(item)
self.__updateNodeView()
self.__updateEdgeView()
self.__scene.update()
@Slot()
def on_actionSave_Image_triggered(self):
self.viewAndScene()
savePath, fileType = QFileDialog.getSaveFileName(
self, self._tr("MainWindow", '保存图片'), '.\\', '*bmp;;*.png')
filename = os.path.basename(savePath)
if filename != "":
self.__view.saveImage(savePath, fileType)
@Slot()
def on_actionDelete_triggered(self):
self.viewAndScene()
self.do_deleteItem()
@Slot(bool)
def on_actionDigraph_Mode_toggled(self, checked: bool):
self.__labModeInfo.setText(self._tr("MainWindow", "有向图模式"))
self.__graph.setMode(checked)
items = self.__scene.singleItems(BezierEdge)
for item in items:
item: BezierEdge
item.setGraphMode(True)
item.update()
@Slot(bool)
def on_actionRedigraph_Mode_toggled(self, checked: bool):
self.__labModeInfo.setText(self._tr("MainWindow", "无向图模式"))
self.__graph.setMode(checked)
items = self.__scene.singleItems(BezierEdge)
for item in items:
item: BezierEdge
item.setGraphMode(False)
item.update()
@Slot(int)
def on_tabWidget_currentChanged(self, index): # ui.tabWidget当前页面变化
self.viewAndScene()
if self.__view and self.__scene:
self.__updateEdgeView()
self.__updateNodeView()
hasTabs = self.ui.tabWidget.count() > 0 # 再无页面时
self.ui.tabWidget.setVisible(hasTabs)
self.ui.dockWidget.setVisible(hasTabs)
self.ui.actionProperty_And_History.setChecked(hasTabs)
@Slot(int)
def on_tabWidget_tabCloseRequested(self, index): # 分页关闭时关闭窗体
if index < 0:
return
view = self.ui.tabWidget.widget(index)
view.close()
# self.__view = None
# self.__scene = None
# =============自定义槽函数===============================
def do_nodeLock(self, item):
self.__updateNodeView()
self.__updateEdgeView()
def do_mouseMove(self, point): ##鼠标移动
##鼠标移动事件，point是 GraphicsView的坐标,物理坐标
view = self._tr("MainWindow", '视图坐标：')
scene = self._tr("MainWindow", '场景坐标：')
self.__labViewCord.setText("%s%d,%d" % (view, point.x(), point.y()))
pt = self.ui.tabWidget.currentWidget().mapToScene(point) # 转换到Scene坐标
self.__labSceneCord.setText("%s%.0f,%.0f" % (scene, pt.x(), pt.y()))
def do_mouseClicked(self, point): ##鼠标单击
pt = self.__view.mapToScene(point) # 转换到Scene坐标
item = self.__scene.itemAt(pt, self.__view.transform()) # 获取光标下的图形项
if item is None:
return
pm = item.mapFromScene(pt) # 转换为绘图项的局部坐标
itemInfo = self._tr("MainWindow", "Item 坐标：")
self.__labItemCord.setText("%s%.0f,%.0f" % (itemInfo, pm.x(), pm.y()))
data = f"{item.data(self.__ItemDesc)}, ItemId={item.data(self.__ItemId)}"
if type(item) is BezierEdge:
data = f"{data},EdgeId=e{item.data(self.__ItemId)}"
elif type(item) is BezierNode:
data = f"{data}, NodeId=V{item.data(self.__ItemId)}"
self.__labItemInfo.setText(data)
def do_mouseDoubleClick(self, point): ##鼠标双击
pt = self.__view.mapToScene(point) # 转换到Scene坐标,QPointF
item = self.__scene.itemAt(pt, self.__view.transform()) # 获取光标下的绘图项
if item is None:
return
className = str(type(item)) # 将类名称转换为字符串
if className.find("QGraphicsRectItem") >= 0: # 矩形框
self.__setBrushColor(item)
elif className.find(
"QGraphicsEllipseItem") >= 0: # 椭圆和圆都是 QGraphicsEllipseItem
self.__setBrushColor(item)
elif className.find("QGraphicsPolygonItem") >= 0: # 梯形和三角形
self.__setBrushColor(item)
elif className.find("QGraphicsLineItem") >= 0: # 直线，设置线条颜色
pen = item.pen()
color = item.pen().__color()
color = QColorDialog.getColor(color, self, "选择线条颜色")
if color.isValid():
pen.setColor(color)
item.setPen(pen)
elif className.find("QGraphicsTextItem") >= 0: # 文字，设置字体
font = item.font()
font, OK = QFontDialog.getFont(font)
if OK:
item.setFont(font)
def do_addItem(self, item):
add = AddCommand(self, self.__scene, item)
self.undoStack.push(add)
def do_shapeMoved(self, item, pos):
move = MoveCommand(item, pos)
self.undoStack.push(move)
def do_deleteItem(self):
items = self.__scene.selectedItems()
cnt = len(items)
for i in range(cnt):
item = items[i]
if str(type(item)).find("BezierNode") >= 0:
item: BezierNode
for edge in item.bezierEdges:
for node, itemType in edge.items():
if itemType == ItemType.SourceType:
node.setSourceNode(None)
elif itemType == ItemType.DestType:
node.setDestNode(None)
self.__nodeNum -= 1
elif str(type(item)).find("BezierEdge") >= 0:
item: BezierEdge
sourceNode: BezierNode = item.sourceNode
destNode: BezierNode = item.destNode
if sourceNode:
sourceNodeList = sourceNode.bezierEdges
for sourceEdge in sourceNodeList:
for edge in sourceEdge.keys():
if item is edge:
sourceNodeList.remove(sourceEdge)
if destNode:
destNodeList = destNode.bezierEdges
for destEdge in destNodeList:
for edge in destEdge.keys():
if item is edge:
destNodeList.remove(destEdge)
self.__edgeNum -= 1
self.__scene.removeItem(item) # 删除绘图项
def do_curEdgeChanged(self, current, previous):
if current is not None:
text = f"当前单元格{current.row()},{current.column()}"
item = self.edgeModel.itemFromIndex(current)
def do_curNodeChanged(self, current, previous):
if current is not None:
text = f"当前单元格{current.row()},{current.column()}"
item = self.nodeModel.itemFromIndex(current)
def do_updateEdgeWeight(self, topLeft, bottomRight):
if topLeft.column() == 4:
edges = self.__scene.singleItems(BezierEdge)
for edge in edges:
edge: BezierEdge
if edge.textCp.toPlainText() == self.edgeModel.index(
topLeft.row(), 0, QModelIndex()).data():
edge.weightCp.setPlainText(str(topLeft.data()))
self.__scene.update()
def do_updateNodeWeight(self, topLeft, bottomRight):
if topLeft.column() == 3:
nodes = self.__scene.singleItems(BezierNode)
for node in nodes:
node: BezierNode
if node.textCp.toPlainText() == self.nodeModel.index(
topLeft.row(), 0, QModelIndex()).data():
node.weightCp.setPlainText(str(topLeft.data()))
self.__scene.update()
def do_ShowSelectPath(self, pathList: list):
self.__scene.clearSelection()
items = self.__scene.uniqueItems()
for item in items:
if item.textCp.toPlainText() in pathList:
item.setSelected(True)
def do_checkIsHasItems(self, num):
if num:
self.ui.actionSave.setEnabled(True)
else:
self.ui.actionSave.setEnabled(False)
class Flow(QGraphicsView):
def __init__(self, main_window, parent_script, config=None):
super(Flow, self).__init__()
# SHORTCUTS
place_new_node_shortcut = QShortcut(QKeySequence('Shift+P'), self)
place_new_node_shortcut.activated.connect(
self.place_new_node_by_shortcut)
move_selected_nodes_left_shortcut = QShortcut(
QKeySequence('Shift+Left'), self)
move_selected_nodes_left_shortcut.activated.connect(
self.move_selected_nodes_left)
move_selected_nodes_up_shortcut = QShortcut(QKeySequence('Shift+Up'),
self)
move_selected_nodes_up_shortcut.activated.connect(
self.move_selected_nodes_up)
move_selected_nodes_right_shortcut = QShortcut(
QKeySequence('Shift+Right'), self)
move_selected_nodes_right_shortcut.activated.connect(
self.move_selected_nodes_right)
move_selected_nodes_down_shortcut = QShortcut(
QKeySequence('Shift+Down'), self)
move_selected_nodes_down_shortcut.activated.connect(
self.move_selected_nodes_down)
select_all_shortcut = QShortcut(QKeySequence('Ctrl+A'), self)
select_all_shortcut.activated.connect(self.select_all)
copy_shortcut = QShortcut(QKeySequence.Copy, self)
copy_shortcut.activated.connect(self.copy)
cut_shortcut = QShortcut(QKeySequence.Cut, self)
cut_shortcut.activated.connect(self.cut)
paste_shortcut = QShortcut(QKeySequence.Paste, self)
paste_shortcut.activated.connect(self.paste)
# UNDO/REDO
self.undo_stack = QUndoStack(self)
self.undo_action = self.undo_stack.createUndoAction(self, 'undo')
self.undo_action.setShortcuts(QKeySequence.Undo)
self.redo_action = self.undo_stack.createRedoAction(self, 'redo')
self.redo_action.setShortcuts(QKeySequence.Redo)
undo_shortcut = QShortcut(QKeySequence.Undo, self)
undo_shortcut.activated.connect(self.undo_activated)
redo_shortcut = QShortcut(QKeySequence.Redo, self)
redo_shortcut.activated.connect(self.redo_activated)
# GENERAL ATTRIBUTES
self.parent_script = parent_script
self.all_node_instances: [NodeInstance] = []
self.all_node_instance_classes = main_window.all_node_instance_classes # ref
self.all_nodes = main_window.all_nodes # ref
self.gate_selected: PortInstanceGate = None
self.dragging_connection = False
self.ignore_mouse_event = False # for stylus - see tablet event
self.last_mouse_move_pos: QPointF = None
self.node_place_pos = QPointF()
self.left_mouse_pressed_in_flow = False
self.mouse_press_pos: QPointF = None
self.tablet_press_pos: QPointF = None
self.auto_connection_gate = None # stores the gate that we may try to auto connect to a newly placed NI
self.panning = False
self.pan_last_x = None
self.pan_last_y = None
self.current_scale = 1
self.total_scale_div = 1
# SETTINGS
self.algorithm_mode = Flow_AlgorithmMode()
self.viewport_update_mode = Flow_ViewportUpdateMode()
# CREATE UI
scene = QGraphicsScene(self)
scene.setItemIndexMethod(QGraphicsScene.NoIndex)
scene.setSceneRect(0, 0, 10 * self.width(), 10 * self.height())
self.setScene(scene)
self.setCacheMode(QGraphicsView.CacheBackground)
self.setViewportUpdateMode(QGraphicsView.BoundingRectViewportUpdate)
self.setRenderHint(QPainter.Antialiasing)
self.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
self.setDragMode(QGraphicsView.RubberBandDrag)
scene.selectionChanged.connect(self.selection_changed)
self.setAcceptDrops(True)
self.centerOn(
QPointF(self.viewport().width() / 2,
self.viewport().height() / 2))
# NODE CHOICE WIDGET
self.node_choice_proxy = FlowProxyWidget(self)
self.node_choice_proxy.setZValue(1000)
self.node_choice_widget = NodeChoiceWidget(
self, main_window.all_nodes) # , main_window.node_images)
self.node_choice_proxy.setWidget(self.node_choice_widget)
self.scene().addItem(self.node_choice_proxy)
self.hide_node_choice_widget()
# ZOOM WIDGET
self.zoom_proxy = FlowProxyWidget(self)
self.zoom_proxy.setFlag(QGraphicsItem.ItemIgnoresTransformations, True)
self.zoom_proxy.setZValue(1001)
self.zoom_widget = FlowZoomWidget(self)
self.zoom_proxy.setWidget(self.zoom_widget)
self.scene().addItem(self.zoom_proxy)
self.set_zoom_proxy_pos()
# STYLUS
self.stylus_mode = ''
self.current_drawing = None
self.drawing = False
self.drawings = []
self.stylus_modes_proxy = FlowProxyWidget(self)
self.stylus_modes_proxy.setFlag(
QGraphicsItem.ItemIgnoresTransformations, True)
self.stylus_modes_proxy.setZValue(1001)
self.stylus_modes_widget = FlowStylusModesWidget(self)
self.stylus_modes_proxy.setWidget(self.stylus_modes_widget)
self.scene().addItem(self.stylus_modes_proxy)
self.set_stylus_proxy_pos()
self.setAttribute(Qt.WA_TabletTracking)
# DESIGN THEME
Design.flow_theme_changed.connect(self.theme_changed)
if config:
config: dict
# algorithm mode
if config.keys().__contains__('algorithm mode'):
if config['algorithm mode'] == 'data flow':
self.parent_script.widget.ui.algorithm_data_flow_radioButton.setChecked(
True)
self.algorithm_mode.mode_data_flow = True
else: # 'exec flow'
self.parent_script.widget.ui.algorithm_exec_flow_radioButton.setChecked(
True)
self.algorithm_mode.mode_data_flow = False
# viewport update mode
if config.keys().__contains__('viewport update mode'):
if config['viewport update mode'] == 'sync':
self.parent_script.widget.ui.viewport_update_mode_sync_radioButton.setChecked(
True)
self.viewport_update_mode.sync = True
else: # 'async'
self.parent_script.widget.ui.viewport_update_mode_async_radioButton.setChecked(
True)
self.viewport_update_mode.sync = False
node_instances = self.place_nodes_from_config(config['nodes'])
self.connect_nodes_from_config(node_instances,
config['connections'])
if list(config.keys()).__contains__(
'drawings'
): # not all (old) project files have drawings arr
self.place_drawings_from_config(config['drawings'])
self.undo_stack.clear()
def theme_changed(self, t):
self.viewport().update()
def algorithm_mode_data_flow_toggled(self, checked):
self.algorithm_mode.mode_data_flow = checked
def viewport_update_mode_sync_toggled(self, checked):
self.viewport_update_mode.sync = checked
def selection_changed(self):
selected_items = self.scene().selectedItems()
selected_node_instances = list(
filter(find_NI_in_object, selected_items))
if len(selected_node_instances) == 1:
self.parent_script.show_NI_code(selected_node_instances[0])
elif len(selected_node_instances) == 0:
self.parent_script.show_NI_code(None)
def contextMenuEvent(self, event):
QGraphicsView.contextMenuEvent(self, event)
# in the case of the menu already being shown by a widget under the mouse, the event is accepted here
if event.isAccepted():
return
for i in self.items(event.pos()):
if find_type_in_object(i, NodeInstance):
ni: NodeInstance = i
menu: QMenu = ni.get_context_menu()
menu.exec_(event.globalPos())
event.accept()
def undo_activated(self):
"""Triggered by ctrl+z"""
self.undo_stack.undo()
self.viewport().update()
def redo_activated(self):
"""Triggered by ctrl+y"""
self.undo_stack.redo()
self.viewport().update()
def mousePressEvent(self, event):
Debugger.debug('mouse press event received, point:', event.pos())
# to catch tablet events (for some reason, it results in a mousePrEv too)
if self.ignore_mouse_event:
self.ignore_mouse_event = False
return
# there might be a proxy widget meant to receive the event instead of the flow
QGraphicsView.mousePressEvent(self, event)
# to catch any Proxy that received the event. Checking for event.isAccepted() or what is returned by
# QGraphicsView.mousePressEvent(...) both didn't work so far, so I do it manually
if self.ignore_mouse_event:
self.ignore_mouse_event = False
return
if event.button() == Qt.LeftButton:
if self.node_choice_proxy.isVisible():
self.hide_node_choice_widget()
else:
if find_type_in_object(self.itemAt(event.pos()),
PortInstanceGate):
self.gate_selected = self.itemAt(event.pos())
self.dragging_connection = True
self.left_mouse_pressed_in_flow = True
elif event.button() == Qt.RightButton:
if len(self.items(event.pos())) == 0:
self.node_choice_widget.reset_list()
self.show_node_choice_widget(event.pos())
elif event.button() == Qt.MidButton:
self.panning = True
self.pan_last_x = event.x()
self.pan_last_y = event.y()
event.accept()
self.mouse_press_pos = self.mapToScene(event.pos())
def mouseMoveEvent(self, event):
QGraphicsView.mouseMoveEvent(self, event)
if self.panning: # middle mouse pressed
self.pan(event.pos())
event.accept()
self.last_mouse_move_pos = self.mapToScene(event.pos())
if self.dragging_connection:
self.viewport().repaint()
def mouseReleaseEvent(self, event):
# there might be a proxy widget meant to receive the event instead of the flow
QGraphicsView.mouseReleaseEvent(self, event)
if self.ignore_mouse_event or \
(event.button() == Qt.LeftButton and not self.left_mouse_pressed_in_flow):
self.ignore_mouse_event = False
return
elif event.button() == Qt.MidButton:
self.panning = False
# connection dropped over specific gate
if self.dragging_connection and self.itemAt(event.pos()) and \
find_type_in_object(self.itemAt(event.pos()), PortInstanceGate):
self.connect_gates__cmd(self.gate_selected,
self.itemAt(event.pos()))
# connection dropped over NodeInstance - auto connect
elif self.dragging_connection and find_type_in_objects(
self.items(event.pos()), NodeInstance):
# find node instance
ni_under_drop = None
for item in self.items(event.pos()):
if find_type_in_object(item, NodeInstance):
ni_under_drop = item
break
# connect
self.try_conn_gate_and_ni(self.gate_selected, ni_under_drop)
# connection dropped somewhere else - show node choice widget
elif self.dragging_connection:
self.auto_connection_gate = self.gate_selected
self.show_node_choice_widget(event.pos())
self.left_mouse_pressed_in_flow = False
self.dragging_connection = False
self.gate_selected = None
self.viewport().repaint()
def keyPressEvent(self, event):
QGraphicsView.keyPressEvent(self, event)
if event.isAccepted():
return
if event.key() == Qt.Key_Escape: # do I need that... ?
self.clearFocus()
self.setFocus()
return True
elif event.key() == Qt.Key_Delete:
self.remove_selected_components()
def wheelEvent(self, event):
if event.modifiers() == Qt.CTRL and event.angleDelta().x() == 0:
self.zoom(event.pos(), self.mapToScene(event.pos()),
event.angleDelta().y())
event.accept()
return True
QGraphicsView.wheelEvent(self, event)
def tabletEvent(self, event):
"""tabletEvent gets called by stylus operations.
LeftButton: std, no button pressed
RightButton: upper button pressed"""
# if in edit mode and not panning or starting a pan, pass on to std mouseEvent handlers above
if self.stylus_mode == 'edit' and not self.panning and not \
(event.type() == QTabletEvent.TabletPress and event.button() == Qt.RightButton):
return # let the mousePress/Move/Release-Events handle it
if event.type() == QTabletEvent.TabletPress:
self.tablet_press_pos = event.pos()
self.ignore_mouse_event = True
if event.button() == Qt.LeftButton:
if self.stylus_mode == 'comment':
new_drawing = self.create_and_place_drawing__cmd(
self.mapToScene(self.tablet_press_pos),
config=self.stylus_modes_widget.get_pen_settings())
self.current_drawing = new_drawing
self.drawing = True
elif event.button() == Qt.RightButton:
self.panning = True
self.pan_last_x = event.x()
self.pan_last_y = event.y()
elif event.type() == QTabletEvent.TabletMove:
self.ignore_mouse_event = True
if self.panning:
self.pan(event.pos())
elif event.pointerType() == QTabletEvent.Eraser:
if self.stylus_mode == 'comment':
for i in self.items(event.pos()):
if find_type_in_object(i, DrawingObject):
self.remove_drawing(i)
break
elif self.stylus_mode == 'comment' and self.drawing:
mapped = self.mapToScene(
QPoint(event.posF().x(),
event.posF().y()))
# rest = QPointF(event.posF().x()%1, event.posF().y()%1)
# exact = QPointF(mapped.x()+rest.x()%1, mapped.y()+rest.y()%1)
# TODO: use exact position (event.posF() ). Problem: mapToScene() only uses QPoint, not QPointF. The
# calculation above didn't work
if self.current_drawing.try_to_append_point(mapped):
self.current_drawing.stroke_weights.append(
event.pressure())
self.current_drawing.update()
self.viewport().update()
elif event.type() == QTabletEvent.TabletRelease:
if self.panning:
self.panning = False
if self.stylus_mode == 'comment' and self.drawing:
Debugger.debug('drawing obj finished')
self.current_drawing.finished()
self.current_drawing = None
self.drawing = False
def dragEnterEvent(self, event):
if event.mimeData().hasFormat('text/plain'):
event.acceptProposedAction()
def dragMoveEvent(self, event):
if event.mimeData().hasFormat('text/plain'):
event.acceptProposedAction()
def dropEvent(self, event):
text = event.mimeData().text()
item: QListWidgetItem = event.mimeData()
Debugger.debug('drop received in Flow:', text)
j_obj = None
type = ''
try:
j_obj = json.loads(text)
type = j_obj['type']
except Exception:
return
if type == 'variable':
self.show_node_choice_widget(
event.pos(), # only show get_var and set_var nodes
[
n for n in self.all_nodes
if find_type_in_object(n, GetVariable_Node)
or find_type_in_object(n, SetVariable_Node)
])
def drawBackground(self, painter, rect):
painter.fillRect(rect.intersected(self.sceneRect()), QColor('#333333'))
painter.setPen(Qt.NoPen)
painter.drawRect(self.sceneRect())
self.set_stylus_proxy_pos(
) # has to be called here instead of in drawForeground to prevent lagging
self.set_zoom_proxy_pos()
def drawForeground(self, painter, rect):
"""Draws all connections and borders around selected items."""
pen = QPen()
if Design.flow_theme == 'dark std':
# pen.setColor('#BCBBF2')
pen.setWidth(5)
pen.setCapStyle(Qt.RoundCap)
elif Design.flow_theme == 'dark tron':
# pen.setColor('#452666')
pen.setWidth(4)
pen.setCapStyle(Qt.RoundCap)
elif Design.flow_theme == 'ghostly' or Design.flow_theme == 'blender':
pen.setWidth(2)
pen.setCapStyle(Qt.RoundCap)
# DRAW CONNECTIONS
for ni in self.all_node_instances:
for o in ni.outputs:
for cpi in o.connected_port_instances:
if o.type_ == 'data':
pen.setStyle(Qt.DashLine)
elif o.type_ == 'exec':
pen.setStyle(Qt.SolidLine)
path = self.connection_path(
o.gate.get_scene_center_pos(),
cpi.gate.get_scene_center_pos())
w = path.boundingRect().width()
h = path.boundingRect().height()
gradient = QRadialGradient(path.boundingRect().center(),
pythagoras(w, h) / 2)
r = 0
g = 0
b = 0
if Design.flow_theme == 'dark std':
r = 188
g = 187
b = 242
elif Design.flow_theme == 'dark tron':
r = 0
g = 120
b = 180
elif Design.flow_theme == 'ghostly' or Design.flow_theme == 'blender':
r = 0
g = 17
b = 25
gradient.setColorAt(0.0, QColor(r, g, b, 255))
gradient.setColorAt(0.75, QColor(r, g, b, 200))
gradient.setColorAt(0.95, QColor(r, g, b, 0))
gradient.setColorAt(1.0, QColor(r, g, b, 0))
pen.setBrush(gradient)
painter.setPen(pen)
painter.drawPath(path)
# DRAW CURRENTLY DRAGGED CONNECTION
if self.dragging_connection:
pen = QPen('#101520')
pen.setWidth(3)
pen.setStyle(Qt.DotLine)
painter.setPen(pen)
gate_pos = self.gate_selected.get_scene_center_pos()
if self.gate_selected.parent_port_instance.direction == 'output':
painter.drawPath(
self.connection_path(gate_pos, self.last_mouse_move_pos))
else:
painter.drawPath(
self.connection_path(self.last_mouse_move_pos, gate_pos))
# DRAW SELECTED NIs BORDER
for ni in self.selected_node_instances():
pen = QPen(QColor('#245d75'))
pen.setWidth(3)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
size_factor = 1.2
x = ni.pos().x() - ni.boundingRect().width() / 2 * size_factor
y = ni.pos().y() - ni.boundingRect().height() / 2 * size_factor
w = ni.boundingRect().width() * size_factor
h = ni.boundingRect().height() * size_factor
painter.drawRoundedRect(x, y, w, h, 10, 10)
# DRAW SELECTED DRAWINGS BORDER
for p_o in self.selected_drawings():
pen = QPen(QColor('#a3cc3b'))
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
size_factor = 1.05
x = p_o.pos().x() - p_o.width / 2 * size_factor
y = p_o.pos().y() - p_o.height / 2 * size_factor
w = p_o.width * size_factor
h = p_o.height * size_factor
painter.drawRoundedRect(x, y, w, h, 6, 6)
painter.drawEllipse(p_o.pos().x(), p_o.pos().y(), 2, 2)
def get_viewport_img(self):
self.hide_proxies()
img = QImage(self.viewport().rect().width(),
self.viewport().height(), QImage.Format_ARGB32)
img.fill(Qt.transparent)
painter = QPainter(img)
painter.setRenderHint(QPainter.Antialiasing)
self.render(painter, self.viewport().rect(), self.viewport().rect())
self.show_proxies()
return img
def get_whole_scene_img(self):
self.hide_proxies()
img = QImage(self.sceneRect().width() / self.total_scale_div,
self.sceneRect().height() / self.total_scale_div,
QImage.Format_RGB32)
img.fill(Qt.transparent)
painter = QPainter(img)
painter.setRenderHint(QPainter.Antialiasing)
rect = QRectF()
rect.setLeft(-self.viewport().pos().x())
rect.setTop(-self.viewport().pos().y())
rect.setWidth(img.rect().width())
rect.setHeight(img.rect().height())
# rect is right... but it only renders from the viewport's point down-and rightwards, not from topleft (0,0) ...
self.render(painter, rect, rect.toRect())
self.show_proxies()
return img
# PROXY POSITIONS
def set_zoom_proxy_pos(self):
self.zoom_proxy.setPos(
self.mapToScene(self.viewport().width() - self.zoom_widget.width(),
0))
def set_stylus_proxy_pos(self):
self.stylus_modes_proxy.setPos(
self.mapToScene(
self.viewport().width() - self.stylus_modes_widget.width() -
self.zoom_widget.width(), 0))
def hide_proxies(self):
self.stylus_modes_proxy.hide()
self.zoom_proxy.hide()
def show_proxies(self):
self.stylus_modes_proxy.show()
self.zoom_proxy.show()
# NODE CHOICE WIDGET
def show_node_choice_widget(self, pos, nodes=None):
"""Opens the node choice dialog in the scene."""
# calculating position
self.node_place_pos = self.mapToScene(pos)
dialog_pos = QPoint(pos.x() + 1, pos.y() + 1)
# ensure that the node_choice_widget stays in the viewport
if dialog_pos.x() + self.node_choice_widget.width(
) / self.total_scale_div > self.viewport().width():
dialog_pos.setX(dialog_pos.x() -
(dialog_pos.x() + self.node_choice_widget.width() /
self.total_scale_div - self.viewport().width()))
if dialog_pos.y() + self.node_choice_widget.height(
) / self.total_scale_div > self.viewport().height():
dialog_pos.setY(dialog_pos.y() -
(dialog_pos.y() +
self.node_choice_widget.height() /
self.total_scale_div - self.viewport().height()))
dialog_pos = self.mapToScene(dialog_pos)
# open nodes dialog
# the dialog emits 'node_chosen' which is connected to self.place_node,
# so this all continues at self.place_node below
self.node_choice_widget.update_list(
nodes if nodes is not None else self.all_nodes)
self.node_choice_widget.update_view()
self.node_choice_proxy.setPos(dialog_pos)
self.node_choice_proxy.show()
self.node_choice_widget.refocus()
def hide_node_choice_widget(self):
self.node_choice_proxy.hide()
self.node_choice_widget.clearFocus()
self.auto_connection_gate = None
# PAN
def pan(self, new_pos):
self.horizontalScrollBar().setValue(
self.horizontalScrollBar().value() -
(new_pos.x() - self.pan_last_x))
self.verticalScrollBar().setValue(self.verticalScrollBar().value() -
(new_pos.y() - self.pan_last_y))
self.pan_last_x = new_pos.x()
self.pan_last_y = new_pos.y()
# ZOOM
def zoom_in(self, amount):
local_viewport_center = QPoint(self.viewport().width() / 2,
self.viewport().height() / 2)
self.zoom(local_viewport_center,
self.mapToScene(local_viewport_center), amount)
def zoom_out(self, amount):
local_viewport_center = QPoint(self.viewport().width() / 2,
self.viewport().height() / 2)
self.zoom(local_viewport_center,
self.mapToScene(local_viewport_center), -amount)
def zoom(self, p_abs, p_mapped, angle):
by = 0
velocity = 2 * (1 / self.current_scale) + 0.5
if velocity > 3:
velocity = 3
direction = ''
if angle > 0:
by = 1 + (angle / 360 * 0.1 * velocity)
direction = 'in'
elif angle < 0:
by = 1 - (-angle / 360 * 0.1 * velocity)
direction = 'out'
else:
by = 1
scene_rect_width = self.mapFromScene(
self.sceneRect()).boundingRect().width()
scene_rect_height = self.mapFromScene(
self.sceneRect()).boundingRect().height()
if direction == 'in':
if self.current_scale * by < 3:
self.scale(by, by)
self.current_scale *= by
elif direction == 'out':
if scene_rect_width * by >= self.viewport().size().width(
) and scene_rect_height * by >= self.viewport().size().height():
self.scale(by, by)
self.current_scale *= by
w = self.viewport().width()
h = self.viewport().height()
wf = self.mapToScene(QPoint(w - 1, 0)).x() - self.mapToScene(
QPoint(0, 0)).x()
hf = self.mapToScene(QPoint(0, h - 1)).y() - self.mapToScene(
QPoint(0, 0)).y()
lf = p_mapped.x() - p_abs.x() * wf / w
tf = p_mapped.y() - p_abs.y() * hf / h
self.ensureVisible(lf, tf, wf, hf, 0, 0)
target_rect = QRectF(QPointF(lf, tf), QSizeF(wf, hf))
self.total_scale_div = target_rect.width() / self.viewport().width()
self.ensureVisible(target_rect, 0, 0)
# NODE PLACING: -----
def create_node_instance(self, node, config):
return self.get_node_instance_class_from_node(node)(node, self, config)
def add_node_instance(self, ni, pos=None):
self.scene().addItem(ni)
ni.enable_personal_logs()
if pos:
ni.setPos(pos)
# select new NI
self.scene().clearSelection()
ni.setSelected(True)
self.all_node_instances.append(ni)
def add_node_instances(self, node_instances):
for ni in node_instances:
self.add_node_instance(ni)
def remove_node_instance(self, ni):
ni.about_to_remove_from_scene() # to stop running threads
self.scene().removeItem(ni)
self.all_node_instances.remove(ni)
def place_new_node_by_shortcut(self): # Shift+P
point_in_viewport = None
selected_NIs = self.selected_node_instances()
if len(selected_NIs) > 0:
x = selected_NIs[-1].pos().x() + 150
y = selected_NIs[-1].pos().y()
self.node_place_pos = QPointF(x, y)
point_in_viewport = self.mapFromScene(QPoint(x, y))
else: # place in center
viewport_x = self.viewport().width() / 2
viewport_y = self.viewport().height() / 2
point_in_viewport = QPointF(viewport_x, viewport_y).toPoint()
self.node_place_pos = self.mapToScene(point_in_viewport)
self.node_choice_widget.reset_list()
self.show_node_choice_widget(point_in_viewport)
def place_nodes_from_config(self,
nodes_config,
offset_pos: QPoint = QPoint(0, 0)):
new_node_instances = []
for n_c in nodes_config:
# find parent node by title, type, package name and description as identifiers
parent_node_title = n_c['parent node title']
parent_node_package_name = n_c['parent node package']
parent_node = None
for pn in self.all_nodes:
pn: Node = pn
if pn.title == parent_node_title and \
pn.package == parent_node_package_name:
parent_node = pn
break
new_NI = self.create_node_instance(parent_node, n_c)
self.add_node_instance(
new_NI,
QPoint(n_c['position x'], n_c['position y']) + offset_pos)
new_node_instances.append(new_NI)
return new_node_instances
def place_node__cmd(self, node: Node, config=None):
new_NI = self.create_node_instance(node, config)
place_command = PlaceNodeInstanceInScene_Command(
self, new_NI, self.node_place_pos)
self.undo_stack.push(place_command)
if self.auto_connection_gate:
self.try_conn_gate_and_ni(self.auto_connection_gate,
place_command.node_instance)
return place_command.node_instance
def remove_node_instance_triggered(
self, node_instance): # called from context menu of NodeInstance
if node_instance in self.selected_node_instances():
self.undo_stack.push(
RemoveComponents_Command(self,
self.scene().selectedItems()))
else:
self.undo_stack.push(
RemoveComponents_Command(self, [node_instance]))
def get_node_instance_class_from_node(self, node):
return self.all_node_instance_classes[node]
def get_custom_input_widget_classes(self):
return self.parent_script.main_window.custom_node_input_widget_classes
def connect_nodes_from_config(self, node_instances, connections_config):
for c in connections_config:
c_parent_node_instance_index = c['parent node instance index']
c_output_port_index = c['output port index']
c_connected_node_instance = c['connected node instance']
c_connected_input_port_index = c['connected input port index']
if c_connected_node_instance is not None: # which can be the case when pasting
parent_node_instance = node_instances[
c_parent_node_instance_index]
connected_node_instance = node_instances[
c_connected_node_instance]
self.connect_gates(
parent_node_instance.outputs[c_output_port_index].gate,
connected_node_instance.
inputs[c_connected_input_port_index].gate)
# DRAWINGS
def create_drawing(self, config=None):
new_drawing = DrawingObject(self, config)
return new_drawing
def add_drawing(self, drawing_obj, pos=None):
self.scene().addItem(drawing_obj)
if pos:
drawing_obj.setPos(pos)
self.drawings.append(drawing_obj)
def add_drawings(self, drawings):
for d in drawings:
self.add_drawing(d)
def remove_drawing(self, drawing):
self.scene().removeItem(drawing)
self.drawings.remove(drawing)
def place_drawings_from_config(self, drawings, offset_pos=QPoint(0, 0)):
"""
:param offset_pos: position difference between the center of all selected items when they were copied/cut and
the current mouse pos which is supposed to be the new center
:param drawings: the drawing objects
"""
new_drawings = []
for d_config in drawings:
x = d_config['pos x'] + offset_pos.x()
y = d_config['pos y'] + offset_pos.y()
new_drawing = self.create_drawing(config=d_config)
self.add_drawing(new_drawing, QPointF(x, y))
new_drawings.append(new_drawing)
return new_drawings
def create_and_place_drawing__cmd(self, pos, config=None):
new_drawing_obj = self.create_drawing(config)
place_command = PlaceDrawingObject_Command(self, pos, new_drawing_obj)
self.undo_stack.push(place_command)
return new_drawing_obj
def move_selected_copmonents__cmd(self, x, y):
new_rel_pos = QPointF(x, y)
# if one node item would leave the scene (f.ex. pos.x < 0), stop
left = False
for i in self.scene().selectedItems():
new_pos = i.pos() + new_rel_pos
if new_pos.x() - i.width / 2 < 0 or \
new_pos.x() + i.width / 2 > self.scene().width() or \
new_pos.y() - i.height / 2 < 0 or \
new_pos.y() + i.height / 2 > self.scene().height():
left = True
break
if not left:
# moving the items
items_group = self.scene().createItemGroup(
self.scene().selectedItems())
items_group.moveBy(new_rel_pos.x(), new_rel_pos.y())
self.scene().destroyItemGroup(items_group)
# saving the command
self.undo_stack.push(
MoveComponents_Command(self,
self.scene().selectedItems(),
p_from=-new_rel_pos,
p_to=QPointF(0, 0)))
self.viewport().repaint()
def move_selected_nodes_left(self):
self.move_selected_copmonents__cmd(-40, 0)
def move_selected_nodes_up(self):
self.move_selected_copmonents__cmd(0, -40)
def move_selected_nodes_right(self):
self.move_selected_copmonents__cmd(+40, 0)
def move_selected_nodes_down(self):
self.move_selected_copmonents__cmd(0, +40)
def selected_components_moved(self, pos_diff):
items_list = self.scene().selectedItems()
self.undo_stack.push(
MoveComponents_Command(self,
items_list,
p_from=-pos_diff,
p_to=QPointF(0, 0)))
def selected_node_instances(self):
selected_NIs = []
for i in self.scene().selectedItems():
if find_type_in_object(i, NodeInstance):
selected_NIs.append(i)
return selected_NIs
def selected_drawings(self):
selected_drawings = []
for i in self.scene().selectedItems():
if find_type_in_object(i, DrawingObject):
selected_drawings.append(i)
return selected_drawings
def select_all(self):
for i in self.scene().items():
if i.ItemIsSelectable:
i.setSelected(True)
self.viewport().repaint()
def select_components(self, comps):
self.scene().clearSelection()
for c in comps:
c.setSelected(True)
def copy(self): # ctrl+c
data = {
'nodes':
self.get_node_instances_json_data(self.selected_node_instances()),
'connections':
self.get_connections_json_data(self.selected_node_instances()),
'drawings':
self.get_drawings_json_data(self.selected_drawings())
}
QGuiApplication.clipboard().setText(json.dumps(data))
def cut(self): # called from shortcut ctrl+x
data = {
'nodes':
self.get_node_instances_json_data(self.selected_node_instances()),
'connections':
self.get_connections_json_data(self.selected_node_instances()),
'drawings':
self.get_drawings_json_data(self.selected_drawings())
}
QGuiApplication.clipboard().setText(json.dumps(data))
self.remove_selected_components()
def paste(self):
data = {}
try:
data = json.loads(QGuiApplication.clipboard().text())
except Exception as e:
return
self.clear_selection()
# calculate offset
positions = []
for d in data['drawings']:
positions.append({'x': d['pos x'], 'y': d['pos y']})
for n in data['nodes']:
positions.append({'x': n['position x'], 'y': n['position y']})
offset_for_middle_pos = QPointF(0, 0)
if len(positions) > 0:
rect = QRectF(positions[0]['x'], positions[0]['y'], 0, 0)
for p in positions:
x = p['x']
y = p['y']
if x < rect.left():
rect.setLeft(x)
if x > rect.right():
rect.setRight(x)
if y < rect.top():
rect.setTop(y)
if y > rect.bottom():
rect.setBottom(y)
offset_for_middle_pos = self.last_mouse_move_pos - rect.center()
self.undo_stack.push(Paste_Command(self, data, offset_for_middle_pos))
def add_component(self, e):
if find_type_in_object(e, NodeInstance):
self.add_node_instance(e)
elif find_type_in_object(e, DrawingObject):
self.add_drawing(e)
def remove_component(self, e):
if find_type_in_object(e, NodeInstance):
self.remove_node_instance(e)
elif find_type_in_object(e, DrawingObject):
self.remove_drawing(e)
def remove_selected_components(self):
self.undo_stack.push(
RemoveComponents_Command(self,
self.scene().selectedItems()))
self.viewport().update()
# NODE SELECTION: ----
def clear_selection(self):
self.scene().clearSelection()
# CONNECTIONS: ----
def connect_gates__cmd(self, parent_gate: PortInstanceGate,
child_gate: PortInstanceGate):
self.undo_stack.push(
ConnectGates_Command(self,
parent_port=parent_gate.parent_port_instance,
child_port=child_gate.parent_port_instance))
def connect_gates(self, parent_gate: PortInstanceGate,
child_gate: PortInstanceGate):
parent_port_instance: PortInstance = parent_gate.parent_port_instance
child_port_instance: PortInstance = child_gate.parent_port_instance
# if they, their directions and their parent node instances are not equal and if their types are equal
if parent_port_instance.direction != child_port_instance.direction and \
parent_port_instance.parent_node_instance != child_port_instance.parent_node_instance and \
parent_port_instance.type_ == child_port_instance.type_:
try: # remove connection if port instances are already connected
index = parent_port_instance.connected_port_instances.index(
child_port_instance)
parent_port_instance.connected_port_instances.remove(
child_port_instance)
parent_port_instance.disconnected()
child_port_instance.connected_port_instances.remove(
parent_port_instance)
child_port_instance.disconnected()
except ValueError: # connect port instances
# remove all connections from parent port instance if it's a data input
if parent_port_instance.direction == 'input' and parent_port_instance.type_ == 'data':
for cpi in parent_port_instance.connected_port_instances:
self.connect_gates__cmd(
parent_gate,
cpi.gate) # actually disconnects the gates
# remove all connections from child port instance it it's a data input
if child_port_instance.direction == 'input' and child_port_instance.type_ == 'data':
for cpi in child_port_instance.connected_port_instances:
self.connect_gates__cmd(
child_gate,
cpi.gate) # actually disconnects the gates
parent_port_instance.connected_port_instances.append(
child_port_instance)
child_port_instance.connected_port_instances.append(
parent_port_instance)
parent_port_instance.connected()
child_port_instance.connected()
self.viewport().repaint()
def try_conn_gate_and_ni(self, parent_gate: PortInstanceGate,
child_ni: NodeInstance):
parent_port_instance: PortInstance = parent_gate.parent_port_instance
if parent_port_instance.direction == 'output':
for inp in child_ni.inputs:
if parent_port_instance.type_ == inp.type_:
self.connect_gates__cmd(parent_gate, inp.gate)
return
elif parent_port_instance.direction == 'input':
for out in child_ni.outputs:
if parent_port_instance.type_ == out.type_:
self.connect_gates__cmd(parent_gate, out.gate)
return
@staticmethod
def connection_path(p1: QPointF, p2: QPointF):
"""Returns the nice looking QPainterPath of a connection for two given points."""
path = QPainterPath()
path.moveTo(p1)
distance_x = abs(p1.x()) - abs(p2.x())
distance_y = abs(p1.y()) - abs(p2.y())
if ((p1.x() < p2.x() - 30)
or math.sqrt((distance_x**2) +
(distance_y**2)) < 100) and (p1.x() < p2.x()):
path.cubicTo(p1.x() + ((p2.x() - p1.x()) / 2), p1.y(),
p1.x() + ((p2.x() - p1.x()) / 2), p2.y(), p2.x(),
p2.y())
elif p2.x() < p1.x() - 100 and abs(distance_x) / 2 > abs(distance_y):
path.cubicTo(p1.x() + 100 + (p1.x() - p2.x()) / 10, p1.y(),
p1.x() + 100 + (p1.x() - p2.x()) / 10,
p1.y() - (distance_y / 2),
p1.x() - (distance_x / 2),
p1.y() - (distance_y / 2))
path.cubicTo(p2.x() - 100 - (p1.x() - p2.x()) / 10,
p2.y() + (distance_y / 2),
p2.x() - 100 - (p1.x() - p2.x()) / 10, p2.y(), p2.x(),
p2.y())
else:
path.cubicTo(p1.x() + 100 + (p1.x() - p2.x()) / 3, p1.y(),
p2.x() - 100 - (p1.x() - p2.x()) / 3, p2.y(), p2.x(),
p2.y())
return path
# GET JSON DATA
def get_json_data(self):
flow_dict = {
'algorithm mode':
'data flow' if self.algorithm_mode.mode_data_flow else 'exec flow',
'viewport update mode':
'sync' if self.viewport_update_mode.sync else 'async',
'nodes':
self.get_node_instances_json_data(self.all_node_instances),
'connections':
self.get_connections_json_data(self.all_node_instances),
'drawings':
self.get_drawings_json_data(self.drawings)
}
return flow_dict
def get_node_instances_json_data(self, node_instances):
script_node_instances_list = []
for ni in node_instances:
node_instance_dict = ni.get_json_data()
script_node_instances_list.append(node_instance_dict)
return script_node_instances_list
def get_connections_json_data(self,
node_instances,
only_with_connections_to=None):
script_ni_connections_list = []
for ni in node_instances:
for out in ni.outputs:
if len(out.connected_port_instances) > 0:
for connected_port in out.connected_port_instances:
# this only applies when saving config data through deleting node instances:
if only_with_connections_to is not None and \
connected_port.parent_node_instance not in only_with_connections_to and \
ni not in only_with_connections_to:
continue
# because I am not allowed to save connections between nodes connected to each other and both
# connected to the deleted node, only the connections to the deleted node shall be saved
connection_dict = {
'parent node instance index':
node_instances.index(ni),
'output port index': ni.outputs.index(out)
}
# yes, very important: when copying components, there might be connections going outside the
# selected lists, these should be ignored. When saving a project, all components are considered,
# so then the index values will never be none
connected_ni_index = node_instances.index(connected_port.parent_node_instance) if \
node_instances.__contains__(connected_port.parent_node_instance) else \
None
connection_dict[
'connected node instance'] = connected_ni_index
connected_ip_index = connected_port.parent_node_instance.inputs.index(connected_port) if \
connected_ni_index is not None else None
connection_dict[
'connected input port index'] = connected_ip_index
script_ni_connections_list.append(connection_dict)
return script_ni_connections_list
def get_drawings_json_data(self, drawings):
drawings_list = []
for drawing in drawings:
drawing_dict = drawing.get_json_data()
drawings_list.append(drawing_dict)
return drawings_list
if __name__ == '__main__':
undo_stack = QUndoStack()
dictionary = {"a": "AAA", "b": "BBB"}
print('* initial dict', dictionary)
undo_stack.push(AppendCommand(dictionary, "c", "CCC"))
print(undo_stack.undoText(), dictionary)
undo_stack.push(AppendCommand(dictionary, "d", "DDD"))
print(undo_stack.undoText(), dictionary)
undo_stack.undo()
print(undo_stack.redoText(), dictionary)
undo_stack.undo()
print(undo_stack.redoText(), dictionary)
undo_stack.redo()
print(undo_stack.undoText(), dictionary)
undo_stack.push(ModifyCommand(dictionary, "a", "---"))
print(undo_stack.undoText(), dictionary)
undo_stack.undo()
print(undo_stack.redoText(), dictionary)
undo_stack.redo()
class URList(UserList):
class __SingleStackCommand__(QUndoCommand):
def __init__(self, myList: 'URList', key: Union[int, slice],
value: Any):
QUndoCommand.__init__(self)
self._list = myList
self._key = key
try:
self._old_value = self._list[key]
except IndexError:
self._old_value = None
self._new_value = value
def undo(self) -> NoReturn:
if self._old_value is None:
del self._list[self._key]
else:
self._list.__realsetitem__(self._key, self._old_value)
def redo(self) -> NoReturn:
self._list.__realsetitem__(self._key, self._new_value)
class __MultiStackCommand__(QUndoCommand):
def __init__(self, myList: 'URList', key: Union[int, slice]):
QUndoCommand.__init__(self)
self._key = key
self._list = myList
def undo(self) -> NoReturn:
self._list[self._key].undo()
def redo(self) -> NoReturn:
self._list[self._key].redo()
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.__stack__ = QUndoStack()
self._macroRunning = False
def __setitem__(self, key: Union[int, slice], value: Any) -> NoReturn:
self.__stack__.push(self.__SingleStackCommand__(self, key, value))
def __getitem__(self, key):
if isinstance(key, slice):
myList = []
if key.step is None:
myRange = range(key.start, key.stop + 1)
else:
myRange = range(key.start, key.stop + 1, key.step)
for cKey in myRange:
myList.append(super().__getitem__(cKey))
return myList
return super().__getitem__(key)
def __realsetitem__(self, key: Union[int, slice], value: Any) -> NoReturn:
def keyUpdate(base, key, value):
if key > (len(base.data) - 1):
super().append(value)
super().__setitem__(key, value)
if isinstance(key, slice):
if key.step is None:
myRange = range(key.start, key.stop + 1)
else:
myRange = range(key.start, key.stop + 1, key.step)
for cKey in myRange:
keyUpdate(self, cKey, value[cKey])
super().__setitem__(cKey, value[cKey])
return
keyUpdate(self, key, value)
def undo(self) -> NoReturn:
self.__stack__.undo()
def redo(self) -> NoReturn:
self.__stack__.redo()
def startBulkUpdate(self) -> NoReturn:
self.__stack__.beginMacro('Bulk update')
self._macroRunning = True
def endBulkUpdate(self) -> NoReturn:
self.__stack__.endMacro()
self._macroRunning = False
def append(self, item) -> None:
self.__setitem__(len(self.data), item)
class UndoableDict(PathDict):
"""
The UndoableDict class implements a PathDict-base_dict class with undo/redo
functionality base_dict on QUndoStack.
"""
def __init__(self, *args, **kwargs):
self.__stack = QUndoStack()
self._macroRunning = False
super().__init__(*args, **kwargs)
# Public methods: dictionary-related
def __setitem__(self, key: str, val: Any) -> NoReturn:
"""
Calls the undoable command to override PathDict assignment to self[key]
implementation and pushes this command on the stack.
"""
if key in self:
self.__stack.push(_SetItemCommand(self, key, val))
else:
self.__stack.push(_AddItemCommand(self, key, val))
def setItemByPath(self, keys: list, value: Any) -> NoReturn:
"""
Calls the undoable command to set a value in a nested object
by key sequence and pushes this command on the stack.
"""
self.__stack.push(_SetItemCommand(self, keys, value))
# Public methods: undo/redo-related
def clearUndoStack(self) -> NoReturn:
"""
Clears the command stack by deleting all commands on it, and
returns the stack to the clean state.
"""
self.__stack.clear()
def canUndo(self) -> bool:
"""
:return true if there is a command available for undo;
otherwise returns false.
"""
return self.__stack.canUndo()
def canRedo(self) -> bool:
"""
:return true if there is a command available for redo;
otherwise returns false.
"""
return self.__stack.canRedo()
def undo(self) -> NoReturn:
"""
Undoes the current command on stack.
"""
self.__stack.undo()
def redo(self) -> NoReturn:
"""
Redoes the current command on stack.
"""
self.__stack.redo()
def undoText(self) -> str:
"""
:return the current command on stack.
"""
return self.__stack.undoText()
def redoText(self) -> str:
"""
:return the current command on stack.
"""
return self.__stack.redoText()
def startBulkUpdate(self, text='Bulk update') -> NoReturn:
"""
Begins composition of a macro command with the given text description.
"""
if self._macroRunning:
print('Macro already running')
return
self.__stack.beginMacro(text)
self._macroRunning = True
def endBulkUpdate(self) -> NoReturn:
"""
Ends composition of a macro command.
"""
if not self._macroRunning:
print('Macro not running')
return
self.__stack.endMacro()
self._macroRunning = False
def bulkUpdate(self,
key_list: list,
item_list: list,
text='Bulk update') -> NoReturn:
"""
Performs a bulk update base_dict on a list of keys and a list of values
:param key_list: list of keys or path keys to be updated
:param item_list: the value to be updated
:return: None
"""
self.startBulkUpdate(text)
for key, value in zip(key_list, item_list):
self.setItemByPath(key, value)
self.endBulkUpdate()
class URDict(UserDict):
"""
The URDict class implements a dictionary-based class with undo/redo
functionality based on QUndoStack.
"""
def __init__(self, *args, **kwargs):
self._stack = QUndoStack()
super().__init__(*args, **kwargs)
self._macroRunning = False
# Private URDict dictionary-based methods to be called via the QUndoCommand-based classes.
def _realSetItem(self, key: Union[str, List], value: Any) -> NoReturn:
"""Actually changes the value for the existing key in dictionary."""
if isinstance(key, list):
self.getItemByPath(key[:-1])[key[-1]] = value
else:
super().__setitem__(key, value)
def _realAddItem(self, key: str, value: Any) -> NoReturn:
"""Actually adds a key-value pair to dictionary."""
super().__setitem__(key, value)
def _realDelItem(self, key: str) -> NoReturn:
"""Actually deletes a key-value pair from dictionary."""
del self[key]
def _realSetItemByPath(self, keys: list, value: Any) -> NoReturn:
"""Actually sets the value in a nested object by the key sequence."""
self.getItemByPath(keys[:-1])[keys[-1]] = value
# Public URDict dictionary-based methods
def __setitem__(self, key: str, val: Any) -> NoReturn:
"""Overrides default dictionary assignment to self[key] implementation.
Calls the undoable command and pushes this command on the stack."""
if key in self:
self._stack.push(_SetItemCommand(self, key, val))
else:
self._stack.push(_AddItemCommand(self, key, val))
def setItemByPath(self, keys: list, value: Any) -> NoReturn:
"""Calls the undoable command to set a value in a nested object
by key sequence and pushes this command on the stack."""
self._stack.push(_SetItemCommand(self, keys, value))
def getItemByPath(self, keys: list, default=None) -> Any:
"""Returns a value in a nested object by key sequence."""
item = self
for key in keys:
if key in item.keys():
item = item[key]
else:
return default
return item
def getItem(self, key: Union[str, list], default=None):
"""Returns a value in a nested object. Key can be either a sequence
or a simple string."""
if isinstance(key, list):
return self.getItemByPath(key, default)
else:
return self.get(key, default)
# Public URDict undostack-based methods
def undoText(self) -> NoReturn:
"""Returns the text of the command which will be undone in the next
call to undo()."""
return self._stack.undoText()
def redoText(self) -> NoReturn:
"""Returns the text of the command which will be redone in the next
call to redo()."""
return self._stack.redoText()
def undo(self) -> NoReturn:
"""Undoes the current command on stack."""
self._stack.undo()
def redo(self) -> NoReturn:
"""Redoes the current command on stack."""
self._stack.redo()
def startBulkUpdate(self, text='Bulk update') -> NoReturn:
"""Begins composition of a macro command with the given text description."""
if self._macroRunning:
print('Macro already running')
return
self._stack.beginMacro(text)
self._macroRunning = True
def endBulkUpdate(self) -> NoReturn:
"""Ends composition of a macro command."""
if not self._macroRunning:
print('Macro not running')
return
self._stack.endMacro()
self._macroRunning = False
class URDict(dict):
class _StackCommand(QUndoCommand):
def __init__(self, dictionary, key, value):
QUndoCommand.__init__(self)
self._dictionary = dictionary
self._key = key
self._old_value = None
thisKey = key
if isinstance(thisKey, list):
thisKey = thisKey[0]
if thisKey in dictionary:
self._old_value = dictionary[key]
self._new_value = value
def undo(self):
# self.setText(" undo command {} - {}:{} = ".format(self._dictionary, self._key, self._value))
if self._old_value is None:
self.setText(" undo command {} - {}:{} = ".format(
self._dictionary, self._key, self._new_value))
del self._dictionary[self._key]
else:
self._dictionary.__realsetitem__(self._key, self._old_value)
def redo(self):
# self.setText(" do/redo command {} + {}:{} = ".format(self._dictionary, self._key, self._value))
self._dictionary.__realsetitem__(self._key, self._new_value)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.__stack__ = QUndoStack()
def __setitem__(self, key, val):
self.__stack__.push(self._StackCommand(self, key, val))
def __getitem__(self, key):
if isinstance(key, list):
return self.getByPath(key)
return super().__getitem__(key)
def __realsetitem__(self, key, val):
if isinstance(key, list):
self.setByPath(key, val)
else:
super().__setitem__(key, val)
def undoText(self):
return self.__stack__.undoText()
def redoText(self):
return self.__stack__.redoText()
def undo(self):
self.__stack__.undo()
def redo(self):
self.__stack__.redo()
def getByPath(self, keys):
"""Access a nested object in root by key sequence.
We can't use reduce and operator"""
item = self
for key in keys:
if key in item.keys():
item = item[key]
else:
raise KeyError
return item
def setByPath(self, keys, value):
"""Get a value in a nested object in root by key sequence."""
self.getByPath(keys[:-1])[keys[-1]] = value