class Window(QtGui.QWidget):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.model = Model()
self.imageLabel = QtGui.QLabel()
self.imageLabel.setBackgroundRole(QtGui.QPalette.Base)
self.imageLabel.setSizePolicy(QtGui.QSizePolicy.Ignored, QtGui.QSizePolicy.Ignored)
self.imageLabel.setScaledContents(False)
self.imageLabel.resize(800,600)
self.scrollArea = ScrollArea()
self.scrollArea.setBackgroundRole(QtGui.QPalette.Dark)
self.scrollArea.setWidget(self.imageLabel)
self.scrollArea.setAlignment(QtCore.Qt.AlignCenter)
layout = QtGui.QVBoxLayout()
layout.addWidget(self.scrollArea)
self.setLayout(layout)
self.scrollArea.nextImageSignal.connect(self.nextImage)
self.scrollArea.prevImageSignal.connect(self.prevImage)
self.scrollArea.zoomInSignal.connect(self.zoomIn)
self.scrollArea.zoomOutSignal.connect(self.zoomOut)
def resizeEvent(self, event):
self.imageLabel.resize(event.size())
self.scrollArea.resize(event.size())
def nextImage(self):
if self.model.hasNextImage():
self.displayImage(self.model.getNextImage())
self.scrollArea.resetNextPageCoordinates()
def prevImage(self):
if self.model.hasPrevImage():
self.displayImage(self.model.getPrevImage())
self.scrollArea.resetPrevPageCoordinates()
def zoomIn(self):
factor = 1.25
self.displayImage(self.model.zoomImage(factor))
def zoomOut(self):
factor = 0.8
self.displayImage(self.model.zoomImage(factor))
def adjustScrollBar(self, scrollBar, factor):
scrollBar.setValue(int(factor * scrollBar.value()
+ ((factor - 1) * scrollBar.pageStep()/2)))
@QtCore.Slot(ImageFile)
def displayImage(self, img):
if not img:
return
if img.image.isNull():
print "Unable to display {}".format(self.model.currentImage)
return
print "Displaying {}/{}".format(self.model.currentImage, self.model.numberOfImages)
self.imageLabel.setPixmap(img.pixmap)
self.imageLabel.resize(img.size)
