cursor doesn't change on keypress (GTKAgg backend)

[kaufman]

When changing the tool mode via keyboard shortcut (for example 'o' to Zoom), the cursor doesn't change immediately. Instead, the mouse has to be moved for the cursor to change. This behavior occurs on the GTKAgg backend, not sure about any others.

[kaufman]

The backends MacOSX and Qt4Agg also have this problem.

[tacaswell]

This is probably related to the draw vs draw_idle issues. For the most part we try to let the gui-framework decide when to re-draw anything on the screen.

I suspect that we are not invalidating the right things when we change the cursor.

[fariza]

The problem is that in the toolbar the set_cursor method is called wihtin the mouse_move method.
This happens in all the backends that I tested (QT, GTK3, TK) but from the code I guess it happens everywhere.

I'll see what I can do to fix this.

[fariza]

@tacaswell How do I know where the cursor is, if the event is a keystroke?

Edit.
Sorry, stupid question it's included in the event

[fariza]

Done PR #3474

[fariza]

@tacaswell please close