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# -*- coding: utf-8 -*-
from pyqtgraph.Qt import QtGui, QtCore
from pyqtgraph.widgets.GraphicsView import GraphicsView
from pyqtgraph.GraphicsScene import GraphicsScene
from pyqtgraph.graphicsItems.ViewBox import ViewBox
#class FlowchartGraphicsView(QtGui.QGraphicsView):
class FlowchartGraphicsView(GraphicsView):
sigHoverOver = QtCore.Signal(object)
sigClicked = QtCore.Signal(object)
def __init__(self, widget, *args):
#QtGui.QGraphicsView.__init__(self, *args)
GraphicsView.__init__(self, *args, useOpenGL=False)
#self.setBackgroundBrush(QtGui.QBrush(QtGui.QColor(255,255,255)))
self._vb = FlowchartViewBox(widget, lockAspect=True, invertY=True)
self.setCentralItem(self._vb)
#self.scene().addItem(self.vb)
#self.setMouseTracking(True)
#self.lastPos = None
#self.setTransformationAnchor(self.AnchorViewCenter)
#self.setRenderHints(QtGui.QPainter.Antialiasing)
self.setRenderHint(QtGui.QPainter.Antialiasing, True)
#self.setDragMode(QtGui.QGraphicsView.RubberBandDrag)
#self.setRubberBandSelectionMode(QtCore.Qt.ContainsItemBoundingRect)
def viewBox(self):
return self._vb
#def mousePressEvent(self, ev):
#self.moved = False
#self.lastPos = ev.pos()
#return QtGui.QGraphicsView.mousePressEvent(self, ev)
#def mouseMoveEvent(self, ev):
#self.moved = True
#callSuper = False
#if ev.buttons() & QtCore.Qt.RightButton:
#if self.lastPos is not None:
#dif = ev.pos() - self.lastPos
#self.scale(1.01**-dif.y(), 1.01**-dif.y())
#elif ev.buttons() & QtCore.Qt.MidButton:
#if self.lastPos is not None:
#dif = ev.pos() - self.lastPos
#self.translate(dif.x(), -dif.y())
#else:
##self.emit(QtCore.SIGNAL('hoverOver'), self.items(ev.pos()))
#self.sigHoverOver.emit(self.items(ev.pos()))
#callSuper = True
#self.lastPos = ev.pos()
#if callSuper:
#QtGui.QGraphicsView.mouseMoveEvent(self, ev)
#def mouseReleaseEvent(self, ev):
#if not self.moved:
##self.emit(QtCore.SIGNAL('clicked'), ev)
#self.sigClicked.emit(ev)
#return QtGui.QGraphicsView.mouseReleaseEvent(self, ev)
class FlowchartViewBox(ViewBox):
def __init__(self, widget, *args, **kwargs):
ViewBox.__init__(self, *args, **kwargs)
self.widget = widget
#self.menu = None
#self._subMenus = None ## need a place to store the menus otherwise they dissappear (even though they've been added to other menus) ((yes, it doesn't make sense))
def getMenu(self, ev):
## called by ViewBox to create a new context menu
self._fc_menu = QtGui.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("Add node")
return [menu, ViewBox.getMenu(self, ev)]
##class FlowchartGraphicsScene(QtGui.QGraphicsScene):
#class FlowchartGraphicsScene(GraphicsScene):
#sigContextMenuEvent = QtCore.Signal(object)
#def __init__(self, *args):
##QtGui.QGraphicsScene.__init__(self, *args)
#GraphicsScene.__init__(self, *args)
#def mouseClickEvent(self, ev):
##QtGui.QGraphicsScene.contextMenuEvent(self, ev)
#if not ev.button() in [QtCore.Qt.RightButton]:
#self.sigContextMenuEvent.emit(ev)
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