def on_actItem_Text_triggered(self): # 添加文字
str, okPressed = QInputDialog.getText(self, "输入文字", "请输入文字")
if okPressed == False or not str:
return ()
item = QGraphicsTextItem(str)
font = self.font()
font.setPointSize(20)
font.setBold(True)
item.setFont(font)
item.setFlags(QGraphicsItem.ItemIsMovable
| QGraphicsItem.ItemIsSelectable
| QGraphicsItem.ItemIsFocusable)
item.setPos(-50 + (QtCore.qrand() % 100), -50 + (QtCore.qrand() % 100))
self.view.frontZ = self.view.frontZ + 1
item.setZValue(self.view.frontZ)
self.view.seqNum = self.view.seqNum + 1
item.setData(self.view.ItemId, self.view.seqNum) # //自定义数据，ItemId键
item.setData(self.view.ItemDesciption, "文字")
self.scene.addItem(item)
self.scene.clearSelection()
item.setSelected(True)
class CallOut():
''' This represents a callouton the diagram
This class creates a text item and then surrounds it with a polygon that is a rectangle
with a pointer to another object on the diagram.
This can be used by hover over functions or be displayed as a part of a node or relationship
'''
def __init__(self, scene, text, anchorPoint, diagramType, format):
self.scene = scene
self.model = self.scene.parent.model
self.text = text
self.anchorPoint = anchorPoint
self.diagramType = diagramType
self.format = format
# initialize the two qgraphicsitems needed to draw a relationship to None
self.itemText = None
self.itemPolygon = None
self.drawIt
def name(self, ):
return "no name"
def NZID(self, ):
return None
def clearItem(self, ):
if (not self.itemText is None and not self.itemText.scene() is None):
self.itemText.scene().removeItem(self.itemText)
if (not self.itemPolygon is None
and not self.itemPolygon.scene() is None):
self.itemPolygon.scene().removeItem(self.itemPolygon)
def drawIt(self, ):
'''
draw the callout
'''
# if the polygon and text graphics items already exist on the scene then delete them
self.clearItem()
# draw the relationship arc
pen = self.format.pen()
brush = self.format.brush()
# create text box
# draw the text
self.itemText = QGraphicsTextItem(self.relationInstance.relName,
parent=None)
self.itemText.setZValue(CALLOUTLAYER)
self.itemText.setFlag(QGraphicsItem.ItemIsMovable, True)
self.itemText.setFlag(QGraphicsItem.ItemIsSelectable, True)
self.itemText.setSelected(False)
self.itemText.setData(NODEID, self.relationInstance.NZID)
self.itemText.setData(ITEMTYPE, CALLOUT)
self.itemText.setHtml(self.genTextHTML())
# set the position of the text
self.itemText.setPos(self.anchorPoint)
# get the height and width of the text graphics item
th = self.IRtext.boundingRect().height()
tw = self.IRtext.boundingRect().width()
#create an empty polygon
arrowPolygon = QPolygonF()
# add callout points
arrowPolygon.append(self.anchorPoint)
arrowPolygon.append(
QPointF(self.anchorPoint.x() + tw, self.anchorPoint.y()))
arrowPolygon.append(
QPointF(self.anchorPoint.x() + tw, self.anchorPoint.y()))
arrowPolygon.append(
QPointF(self.anchorPoint.x() + tw,
self.anchorPoint.y() + th))
arrowPolygon.append(
QPointF(self.anchorPoint.x(),
self.anchorPoint.y() + th))
self.itemPolygon = QGraphicsPolygonItem(
arrowPolygon,
parent=None,
)
self.itemPolygon.setZValue(CALLOUTLAYER)
self.itemPolygon.setBrush(brush)
self.itemPolygon.setPen(pen)
self.itemPolygon.setFlag(QGraphicsItem.ItemIsMovable, True)
self.itemPolygon.setFlag(QGraphicsItem.ItemSendsGeometryChanges, True)
self.itemPolygon.setFlag(QGraphicsItem.ItemIsSelectable, False)
self.itemPolygon.setSelected(False)
# set data in the RelLine object
self.IRel.setData(NODEID, self.relationInstance.NZID)
self.IRel.setData(ITEMTYPE, RELINSTANCEARC)
# add the polygon object to the scene
self.scene.addItem(self.itemPolygon)
# add text to the scene
self.scene.addItem(self.itemText)
def updateText(self, ):
# # force the node instance to update its values in case it has been updated from another diagram or the tree view
# self.relationInstance.reloadDictValues()
# self.IRtext.setPlainText(self.relationInstance.relName)
self.itemText.setHtml(self.genTextHTML())
def genTextHTML(self):
'''generate html to display the text
'''
prefix = '<html><body>'
suffix = "</body></html>"
myHTML = ('{}<p><font size="1"> [{}]</font></p>{}'.format(
prefix, self.text, suffix))
return myHTML
def moveIt(self, ):
self.drawIt()
