I want to update a pixmap on single click, so I tried this:
import sys
from PyQt4 import QtGui,QtCore
class myLabel(QtGui.QLabel):
def __init__(self,*args,**kwargs):
QtGui.QLabel.__init__(self,*args,**kwargs)
self.painter = QtGui.QPainter()
def mousePressEvent(self, ev):
QtGui.QLabel.mousePressEvent(self,ev)
pm = self.pixmap()
self.painter.begin(pm)
self.painter.setPen(QtGui.QPen(QtCore.Qt.red, 120))
self.painter.drawPoint(ev.pos())
self.painter.end()
self.setPixmap(pm)
print ev.pos()
if __name__=='__main__':
app = QtGui.QApplication(sys.argv)
mw = QtGui.QWidget()
model_pm = QtGui.QPixmap(300,300)
model_l = myLabel()
model_res_pm = QtGui.QPixmap(300,300)
model_res_l = myLabel()
draw_pm = QtGui.QPixmap(300,300)
draw_l = myLabel()
draw_res_pm = QtGui.QPixmap(300,300)
draw_res_l = myLabel()
map(lambda pm: pm.fill(),(model_pm,model_res_pm,draw_pm,draw_res_pm))
model_l.setPixmap(model_pm)
model_res_l.setPixmap(model_res_pm)
draw_l.setPixmap(draw_pm)
draw_res_l.setPixmap(draw_res_pm)
layout = QtGui.QGridLayout()
layout.addWidget(model_l,0,0,1,1)
layout.addWidget(model_res_l,1,0,1,1)
layout.addWidget(draw_l,0,1,1,1)
layout.addWidget(draw_res_l,1,1,1,1)
mw.setLayout(layout)
mw.show()
mw.setFixedSize(mw.geometry().size())
sys.exit(app.exec_())
On Linux a big red square shows on click (wich is good). But under Windows
pixmaps remain white (checked under Win7 and XP). Looks like a bug to me...
Code on pastebin: http://pastebin.com/BKtNQ8rb
PyQt-4.7 and Python 2.6.4 on both Linux and Windows.
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