I have a pyqt widget that displays an image. This widget should be extended so that :
* in case no image is set, it displays a dummy image
* if an image is dropped on it, this new image is displayed
* there are 3 buttons displayed next to the image :
* 1 button to clear the image, and display the dummy again
* 1 button to open a file browser and select a new image to display
* 1 button to open the currently set widget with the default application
* * 1 button to clear the image, and display the dummy again
* 1 button to open a file browser and select a new image to display
* 1 button to open the currently set widget with the default application