diff -r 85503ff2fce9 -r 6285e8374d99 eric7/HelpViewer/HelpViewerImpl_qtb.py
--- a/eric7/HelpViewer/HelpViewerImpl_qtb.py Mon Oct 11 19:59:45 2021 +0200
+++ b/eric7/HelpViewer/HelpViewerImpl_qtb.py Tue Oct 12 19:54:03 2021 +0200
@@ -30,6 +30,8 @@
QTextBrowser.__init__(self, parent=parent)
HelpViewerImpl.__init__(self, engine)
+ self.__zoomCount = 0
+
self.sourceChanged.connect(self.titleChanged)
def setUrl(self, url):
@@ -123,3 +125,76 @@
# forward
for ind in range(index):
self.forward()
+
+ def scaleUp(self):
+ """
+ Public method to zoom in.
+ """
+ if self.__zoomCount < 10:
+ self.__zoomCount += 1
+ self.zoomIn()
+ self.zoomChanged.emit()
+
+ def scaleDown(self):
+ """
+ Public method to zoom out.
+ """
+ if self.__zoomCount > -5:
+ self.__zoomCount -= 1
+ self.zoomOut()
+ self.zoomChanged.emit()
+
+ def resetScale(self):
+ """
+ Public method to reset the zoom level.
+ """
+ if self.__zoomCount != 0:
+ self.zoomOut(self.__zoomCount)
+ self.zoomChanged.emit()
+ self.__zoomCount = 0
+
+ def scale(self):
+ """
+ Public method to get the zoom level.
+
+ @return current zoom level
+ @rtype int
+ """
+ return self.__zoomCount
+
+ def isScaleUpAvailable(self):
+ """
+ Public method to check, if the max. zoom level is reached.
+
+ @return flag indicating scale up is available
+ @rtype bool
+ """
+ return self.__zoomCount < 10
+
+ def isScaleDownAvailable(self):
+ """
+ Public method to check, if the min. zoom level is reached.
+
+ @return flag indicating scale down is available
+ @rtype bool
+ """
+ return self.__zoomCount > -5
+
+ def wheelEvent(self, evt):
+ """
+ Public method to handle wheel event to zoom.
+
+ @param evt reference to the event object
+ @type QWheelEvent
+ """
+ if evt.modifiers() == Qt.KeyboardModifier.ControlModifier:
+ if evt.angleDelta().y() > 0:
+ self.scaleUp()
+ else:
+ self.scaleDown()
+ evt.accept()
+ else:
+ QTextBrowser.wheelEvent(self, evt)
+
+ # TODO: implement context menu
+ # TODO: add Ctrl+LMB action (open link in new page)
