def remove_widget_from_scroll(widget: QWidget, parent_layout: QBoxLayout,
data_list: List):
"""Remove a widget from a scroll area, and remove the associated data.
Parameters
----------
widget : QWidget
Widget that should be removed
parent_layout : QBoxLayout
The layout of the scroll area the widget should be removed from
data_list : List
The list of data related to the widgets in this scroll area.
Information
-----------
Only removes the widget and data if there will still be widgets
in the scroll area after this widget is removed.
"""
if parent_layout.count() > 2: # ? 2 instead of 1 because of spacer.
index = parent_layout.indexOf(widget)
del data_list[index]
remove_all_widgets(widget.layout())
parent_layout.removeWidget(widget)
widget.deleteLater()
class CToolBarArea(QWidget):
signalDragStart = pyqtSignal()
signalDragEnd = pyqtSignal()
signalItemDropped = pyqtSignal(CToolBarAreaItem, QWidget, int)
def __init__(self, parent, orientation):
super().__init__(parent)
self.editor = parent
self.orientation = orientation
self.dropTargetSpacer = None
self.actionContextPosition = QPoint()
self.isLocked = False
if self.orientation == Qt.Horizontal:
self.layout_ = QBoxLayout(QBoxLayout.LeftToRight)
else:
self.layout_ = QBoxLayout(QBoxLayout.TopToBottom)
self.layout_.setSpacing(0)
self.layout_.setContentsMargins(0, 0, 0, 0)
self.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
self.setLayout(self.layout_)
self.setAcceptDrops(True)
self.setContextMenuPolicy(Qt.CustomContextMenu)
# print ( "CToolBarArea.__init__", parent )
def getOrientation(self):
return self.orientation
def getToolBars(self):
items = getAllItems(self)
toolBarItems = []
for item in items:
if item.getType() != CToolBarAreaType.ToolBar:
continue
toolBarItems.append(item)
return toolBarItems
def getLargestItemMinimumSize(self):
minSize = self.minimumSize()
items = getAllItems(self)
for item in items:
minSize = minSize.expandedTo(item.getMinimumSize())
return minSize
def setOrientation(self, orientation):
self.orientation = orientation
self.layout_.setDirection(QBoxLayout.LeftToRight if self.orientation ==
Qt.Horizontal else QBoxLayout.TopToBottom)
self.updateLayoutAlignment()
items = getAllItems(self)
for item in items:
item.setOrientation(self.orientation)
def setActionContextPosition(self, actionContextPosition):
self.actionContextPosition = actionContextPosition
def fillContextMenu(self, menu):
pass
def addItem(self, item, targetIndex):
item.signalDragStart.connect(self.onDragStart)
item.signalDragEnd.connect(self.onDragEnd)
item.setOrientation(self.orientation)
item.setLocked(self.isLocked)
self.layout_.insertWidget(targetIndex, item)
item.setArea(self)
def addToolBar(self, toolBar, targetIndex):
self.addItem(CToolBarItem(self, toolBar, self.orientation),
targetIndex)
def addSpacer(self, spacerType, targetIndex):
self.addItem(CSpacerItem(self, spacerType, self.orientation),
targetIndex)
if spacerType == CSpacerType.Expanding:
self.layout_.setAlignment(0)
def removeItem(self, item):
self.layout_.removeWidget(item)
item.signalDragStart.disconnect(self)
item.signalDragEnd.disconnect(self)
self.updateLayoutAlignment(item)
def deleteToolBar(self, toolBarItem):
if self.isAncestorOf(toolBarItem):
qWarning("Trying to remove non-owned toolbar from area")
return
toolBarItem.deleteLater()
def hideAll(self):
items = getAllItems(self)
for item in items:
item.setVisible(False)
def findToolBarByName(self, szToolBarName):
toolBarItems = self.findChildren(CToolBarItem, "",
Qt.FindDirectChildrenOnly)
for toolBarItem in toolBarItems:
if toolBarItem.getName() == szToolBarName:
return toolBarItem
print("Toolbar not found: %s" % szToolBarName)
return None
def setLocked(self, isLocked):
self.isLocked = isLocked
items = getAllItems(self)
for item in items:
item.setLocked(isLocked)
def getState(self):
pass
def setState(self, state):
pass
def dragEnterEvent(self, event):
print("CToolBarArea.dragEnterEvent", event)
dragDropData = CDragDropData.fromMimeData(event.mimeData())
if dragDropData.hasCustomData(CToolBarAreaItem.getMimeType()):
byteArray = dragDropData.getCustomData(
CToolBarAreaItem.getMimeType())
stream = QDataStream(byteArray)
value = None
stream >> value
draggedItem = value if isinstance(value,
CToolBarAreaItem) else None
if not self.parentWidget().isAncestorOf(draggedItem):
return
event.acceptProposedAction()
self.setProperty("dragHover", True)
self.style().unpolish(self)
self.style().polish(self)
def dragMoveEvent(self, event):
dragDropData = CDragDropData.fromMimeData(event.mimeData())
if dragDropData.hasCustomData(CToolBarAreaItem.getMimeType()):
targetIndex = self.getPlacementIndexFromPosition(
self.mapToGlobal(event.pos()))
event.acceptProposedAction()
if self.dropTargetSpacer and targetIndex == self.layout_.indexOf(
self.dropTargetSpacer):
return
byteArray = dragDropData.getCustomData(
CToolBarAreaItem.getMimeType())
stream = QDataStream(byteArray)
value = None
stream >> value
draggedItem = value if isinstance(value,
CToolBarAreaItem) else None
if not self.parentWidget().isAncestorOf(draggedItem):
return
spacerWidth = draggedItem.width()
spacerHeight = draggedItem.height()
if draggedItem.getOrientation() != self.orientation:
tempWidth = spacerWidth
spacerWidth = spacerHeight
spacerHeight = tempWidth
if self.dropTargetSpacer == None:
self.dropTargetSpacer = QSpacerItem(spacerWidth, spacerHeight,
QSizePolicy.Fixed,
QSizePolicy.Fixed)
else:
spacerIndex = self.layout_.indexOf(self.dropTargetSpacer)
if spacerIndex == targetIndex - 1 or (
targetIndex == -1
and spacerIndex == self.layout_.count() - 1):
return
self.removeDropTargetSpacer()
self.dropTargetSpacer = QSpacerItem(spacerWidth, spacerHeight,
QSizePolicy.Fixed,
QSizePolicy.Fixed)
self.layout_.insertSpacerItem(targetIndex, self.dropTargetSpacer)
def dragLeaveEvent(self, event):
self.removeDropTargetSpacer()
self.setProperty("dragHover", False)
self.style().unpolish(self)
self.style().polish(self)
def dropEvent(self, event):
dragDropData = CDragDropData.fromMimeData(event.mimeData())
if dragDropData.hasCustomData(CToolBarAreaItem.getMimeType()):
event.acceptProposedAction()
byteArray = dragDropData.getCustomData(
CToolBarAreaItem.getMimeType())
stream = QDataStream(byteArray)
value = None
stream >> value
item = value if isinstance(value, CToolBarAreaItem) else None
targetIndex = -1
if self.dropTargetSpacer:
targetIndex = self.layout_.indexOf(self.dropTargetSpacer)
containerIndex = self.layout_.indexOf(item)
if containerIndex >= 0 and containerIndex < targetIndex:
targetIndex -= 1
self.removeDropTargetSpacer()
if targetIndex >= self.layout_.count():
targetIndex = -1
self.signalItemDropped.emit(item, self, targetIndex)
def customEvent(self, event):
pass
def paintEvent(self, event):
styleOption = QStyleOption()
styleOption.initFrom(self)
painter = QPainter(self)
self.style().drawPrimitive(QStyle.PE_Widget, styleOption, painter,
self)
def onDragStart(self, item):
self.updateLayoutAlignment(item)
item.setVisiable(False)
self.signalDragStart.emit()
def onDragEnd(self, item):
item.setVisiable(True)
self.signalDragEnd.emit()
def removeDropTargetSpacer(self):
if self.dropTargetSpacer:
self.layout_.removeItem(self.dropTargetSpacer)
self.dropTargetSpacer = None
def indexForItem(self, item):
return self.layout_.indexOf(item)
def moveItem(self, item, destinationIndex):
sourceIndex = self.indexForItem(item)
if sourceIndex == destinationIndex:
return
self.layout_.insertWidget(destinationIndex, item)
def updateLayoutAlignment(self, itemToBeRemoved=None):
spacers = self.findChildren(CSpacerItem, "", Qt.FindDirectChildrenOnly)
expandingSpacers = []
for spacer in spacers:
if spacer.getSpacerType() == CSpacerType.Expanding:
expandingSpacers.append(spacer)
if len(expandingSpacers) == 0 or len(expandingSpacers) != 0 or (
len(expandingSpacers) == 1
and expandingSpacers[0] == itemToBeRemoved):
if self.orientation == Qt.Horizontal:
self.layout_.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
else:
self.layout_.setAlignment(Qt.AlignTop | Qt.AlignHCenter)
def getItemAtPosition(self, globalPos):
object = QApplication.widgetAt(globalPos)
if object == None or object == self:
return None
item = object if isinstance(object, CToolBarAreaItem) else None
while item == None and object.parent():
object = object.parent()
item = object if isinstance(object, CToolBarAreaItem) else None
return item
def getPlacementIndexFromPosition(self, globalPos):
targetIndex = -1
item = self.getItemAtPosition(globalPos)
if item == None:
localPos = self.mapFromGlobal(globalPos)
if self.dropTargetSpacer:
geom = self.dropTargetSpacer.geometry()
if geom.contains(localPos):
targetIndex = self.layout_.indexOf(self.dropTargetSpacer)
return targetIndex
targetIndex = self.indexForItem(item)
if self.orientation == Qt.Horizontal and item.mapFromGlobal(
globalPos).x() > item.width() / 2:
targetIndex += 1
elif self.orientation == Qt.Vertical and item.mapFromGlobal(
globalPos).y() > item.height() / 2:
targetIndex += 1
if targetIndex >= self.layout_.count():
targetIndex = -1
return targetIndex
