Touch gesture overrides some double-click actions on touchpad

[artisteacher]

Issue Summary

I really love the double tap to “fit to window” - it’s super convenient with touchpad navigation. However when trying to perform certain actions that require a double-click (double-tap on a touchpad), “fit to window” occurs instead of the tool action. This is a problem trying to end a polyline for the select, erase, and fill tools. There may be other times when this occurs. This is likely only a problem on Mac laptops.

Screenshot or Video Reference

Steps to Reproduce

1. With touch gestures on, choose either the fill, erase, or select tool
2. Set the mode to polyline and click at various points to create a boundary to fill or erase or select part of a drawing
3. Double-tap at the starting point to close the polyline - the view resets, leaving the polyline still connected & active instead of closing & filling/erasing/selecting

Expected Results

For the polyline to close, the fill/erase/select action to occur, and “fit to window” to not occur during any tool’s double tap event.

One way to resolve this (which should happen anyway for consistency) is for polyline to close without a double click for all tool’s with a polyline mode - not just the geometric tool. In addition, the touch gesture should really be set not to occur when a tool action uses double-click/double-tap.

Actual Results

Fit to window overrides a tool’s double tap.

System Information

• OpenToonz Version: 1.2.1 & nightly builds
• Operating System: 10.13.6 & 10.14
• CPU:
• Memory:
• Graphics Card:
• Graphics Tablet:

[artisteacher]

Similarly, double-clicking to enter a group (with touch enabled) can trigger fit to window. This may be partially due to #2775...