def getQImage(self, resX=None,resY=None):
#zoom the the chosen colorrange:
r = self.ui.histogram.region.getRegion()
self.ui.histogram.vb.setYRange(*r)
#create ImageExporters:
mainExp = ImageExporter(self.view)
colorAxisExp = ImageExporter(self.ui.histogram.axis)
colorBarExp = ImageExporter(self.ui.histogram.gradient)
if resX or resY:
#get size-x:
mainW = mainExp.getTargetRect().width()
colorAxisW = colorAxisExp.getTargetRect().width()
colorBarW = colorBarExp.getTargetRect().width()
#all parts have the same height:
mainExp.parameters()['height'] = resY
colorAxisExp.parameters()['height'] = resY
colorBarExp.parameters()['height'] = resY
#size x is proportional:
sumWidth = mainW + colorAxisW + colorBarW
mainExp.parameters()['width'] = resX * mainW / sumWidth
colorAxisExp.parameters()['width'] = resX * colorAxisW / sumWidth
colorBarExp.parameters()['width'] = resX * colorBarW / sumWidth
#create QImages:
main =mainExp.export(toBytes=True)
colorAxis =colorAxisExp.export(toBytes=True)
colorBar = colorBarExp.export(toBytes=True)
#define the size:
x = main.width() + colorAxis.width() + colorBar.width()
y = main.height()
#to get everything in the same height:
yOffs = [0,0.5*(y-colorAxis.height()),0.5*(y-colorBar.height())]
result = QtGui.QImage(x, y ,QtGui.QImage.Format_RGB32)
#the colorbar is a bit smaller that the rest. to exclude black lines paint all white:
result.fill(QtCore.Qt.white)
painter = QtGui.QPainter(result)
posX = 0
for img,y in zip((main,colorAxis,colorBar),yOffs):
#draw every part in different positions:
painter.drawImage(posX, y, img)
posX += img.width()
painter.end()
return result
