I'd like to find out if a user hovers over or clicks a GraphicsScene shape object (for example, the ellipse object I commented below). I'm new to PyQt and the documentation is much better for C++ than Python, so I'm having a bit of trouble figuring this one out.
from PyQt4 import QtGui, QtCore
class MyFrame(QtGui.QGraphicsView):
def __init__( self, parent = None ):
super(MyFrame, self).__init__(parent)
self.setScene(QtGui.QGraphicsScene())
# add some items
x = 0
y = 0
w = 45
h = 45
pen = QtGui.QPen(QtGui.QColor(QtCore.Qt.green))
brush = QtGui.QBrush(pen.color().darker(150))
# i want a mouse over and mouse click event for this ellipse
item = self.scene().addEllipse(x, y, w, h, pen, brush)
item.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
if ( __name__ == '__main__' ):
app = QtGui.QApplication([])
f = MyFrame()
f.show()
app.exec_()
Update!!!
Now I can get an event to take place based on a mouse click release. Unfortunately, only the last item I create can respond to events. What's going on here?
from PyQt4 import QtGui, QtCore
class MyFrame(QtGui.QGraphicsView):
def __init__( self, parent = None ):
super(MyFrame, self).__init__(parent)
self.setScene(QtGui.QGraphicsScene())
# add some items
x = 0
y = 0
w = 20
h = 20
pen = QtGui.QPen(QtGui.QColor(QtCore.Qt.green))
brush = QtGui.QBrush(pen.color().darker(150))
# i want a mouse over and mouse click event for this ellipse
for xi in range(10):
for yi in range(10):
item = callbackRect(x+xi*30, y+yi*30, w, h)
item.setAcceptHoverEvents(True)
item.setPen(pen)
item.setBrush(brush)
self.scene().addItem(item)
# item = self.scene().addEllipse(x, y, w, h, pen, brush)
item.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
class callbackRect(QtGui.QGraphicsRectItem):
'''
Rectangle call-back class.
'''
def mouseReleaseEvent(self, event):
# recolor on click
color = QtGui.QColor(180, 174, 185)
brush = QtGui.QBrush(color)
QtGui.QGraphicsRectItem.setBrush(self, brush)
return QtGui.QGraphicsRectItem.mouseReleaseEvent(self, event)
def hoverMoveEvent(self, event):
# Do your stuff here.
pass
if ( __name__ == '__main__' ):
app = QtGui.QApplication([])
f = MyFrame()
f.show()
app.exec_()
You can define your own ellipse class and replace both click and hover events:
Usage:
Hope it helps!