There is a problem came at the daily work, to show a button on a graphics view,
this button is supposed to have the hover state, with an icon, but not general image format, but use SVG.
My first time to use svg image, even i know it is vector image before.
To learn a bit of the Graphics View framework and showing svg, I create this small demo.
There are some tasks in this demo:
1. create a scene, add items to it, use view to show the scene;
2. load and display svg image, image can be created from online svg editor;
3. add general qt widget to scene, graphicsitem->graphicsobject(signal/slot)
->graphicswidget(custom widget)->graphicsProxyWidget(use with QWidget).
4. svg as icon added to a button. by using button, we have the hover state.
代码在GitHub/coding_exercises/svgDemo