Zoom, pan, rotate canvas with touch gestures

Submitted by Josef Kufner (@jk)

Link to original bug (#752698)

Description

I have Wacom digitizer and Synaptics touch screen digitizer in my Thinkpad Yoga 12. That means I can touch my display with pen or finger and input layer can distinguish these two "tools". So for example in Xournal I use fingers to pan and pen to draw. I want the same in Gimp, but there is no obvious way to set it up.

I managed to configure input devices in a way that mouse pointer and wacom pen each have their own tool, so I can use my finger as eraser and pen as a pen. But still no panning.

I guess the easiest sollution would be to add "Pan tool" next to "Zoom tool" in the toolbar. Then I would assign it to my finger and everything would be fine.

Version: 2.8.14