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from ..graphicsItems.ViewBox import ViewBox
from ..Qt import QtCore, QtGui, QtWidgets
from ..widgets.GraphicsView import GraphicsView
translate = QtCore.QCoreApplication.translate
class FlowchartGraphicsView(GraphicsView):
sigHoverOver = QtCore.Signal(object)
sigClicked = QtCore.Signal(object)
def __init__(self, widget, *args):
GraphicsView.__init__(self, *args, useOpenGL=False)
self._vb = FlowchartViewBox(widget, lockAspect=True, invertY=True)
self.setCentralItem(self._vb)
self.setRenderHint(QtGui.QPainter.RenderHint.Antialiasing, True)
def viewBox(self):
return self._vb
class FlowchartViewBox(ViewBox):
def __init__(self, widget, *args, **kwargs):
ViewBox.__init__(self, *args, **kwargs)
self.widget = widget
def getMenu(self, ev):
## called by ViewBox to create a new context menu
self._fc_menu = QtWidgets.QMenu()
self._subMenus = self.getContextMenus(ev)
for menu in self._subMenus:
self._fc_menu.addMenu(menu)
return self._fc_menu
def getContextMenus(self, ev):
## called by scene to add menus on to someone else's context menu
menu = self.widget.buildMenu(ev.scenePos())
menu.setTitle(translate("Context Menu", "Add node"))
return [menu, ViewBox.getMenu(self, ev)]
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