def openFrameGroup(self, fgroup):
'''Slot to know when the application opens a new framegroup'''
frameCount = len(fgroup)
self.ui.frameSlider.setMaximum(frameCount -1)
# render previews
f0 = fgroup[0][0].asQPixmap()
previewW = self.ui.previewLabel.width()
previewH = self.ui.previewLabel.height()
previewPmap = QtGui.QPixmap(previewW, previewH)
previewPmap.fill()
scaledW = f0.width() * previewH / f0.height()
printCount = int(previewW) / int(scaledW) # int division
freeSpace = float(previewW - (printCount * scaledW)) / (printCount - 1)
painter = QtGui.QPainter(previewPmap)
for i in xrange(printCount):
fid = int(round(float(i * (frameCount-1)) / (printCount-1)))
x = int(round(i * (freeSpace + scaledW)))
frame = fgroup[fid][0].asQPixmap().scaled(scaledW, previewH)
painter.drawPixmap(x,0,frame)
painter.end()
self.ui.previewLabel.setPixmap(previewPmap)
# render the current frame
self.ui.frameLabel.setPixmap(fgroup.current()[0].asQPixmap())
def asQPixmap(self):
'''Returns a qpixmap for this frame'''
if self._qpixmap is None:
self._qpixmap = QtGui.QPixmap(self._filename)
return self._qpixmap