- graphical celan up (surrounding frame deleted, histogram realigned)
- a feedback tell what point is going to move
- on Button press, the point doesn't move to the cursor anymore. Instead, the cursor
is hidden during the drag and reappear in the same place it disappeared
- by default, a 0.5 factor is used to move the point during the drag
(i.e. you have to move the move of 2 pixel to move the point of one pixel)
- keyboard can be used to fine tune the point position (subpixel placement) :
- CTRL : factor = 0.1
- SHIFT : factor = 0.02
- CTRL+SHIFT : factor = 0.005
In the mean time, i had to create a new "Empty" cursor to hide it.
A new method has been created to easily modify the cursor of the main window.
