Window management - Grid: Windows should not show the semi-maximise preview when the minimum width of the window is greater than the semi-maximise width

[John Lea]

compiz 1:0.9.7.4-0ubuntu1, unity 5.8.0-0ubuntu2, Ubuntu Pangolin

Description:
- When a user tries to semi-maximise a window with a minimum horizontal size e.g. the Empathy 'Messaging and VoIP Accounts' window , a semi-maximise gesture preview is displayed. However releasing the window will not semi-maximise the window because the window's minimum size is less than with width of the semi-maximise.

To reproduce:
0. If necessary, switch to a display width that is less than double the minimum width of a window you have handy. For example, 1280 pixels and Ubuntu Software Center, which has a minimum width of 730 pixels.
1. Drag all the way to the right edge of the screen.
2. Release the drag.
3. Drag all the way to the left edge of the screen.
4. Release the drag.

What happens:
1. The semi-maximize preview overlay appears.
2. The window is placed as if it takes up half the screen, but is resized only to its minimum width, so its right side falls off the edge of the screen.
3. The semi-maximize preview overlay appears.
4. The window is semi-maximized at *less than* its specified minimum width.

What should happen:
1. Normal window movement continues, with no semi-maximize preview.
2. The window is moved, but not semi-maximized, because it's too wide.
3. Normal window movement continues, with no semi-maximize preview.
4. The window is moved, but not semi-maximized, because it's too wide.

[Updated from the original description, where the preview would appear but the semi-maximizing wouldn't happen.]

[David Barth (dbarth)]

The feature itself (semi-maximizing) is working. However, there are applications, as you describe, which will refuse to honor the window manager's resizing command.

This bug should be splitted into per-application bugs to figure out how to fix the applications individually.

[David Barth (dbarth)]

Actually, since application windows have to define a mininum size, the compiz plugin could check the app. windows requirement before displaying the semi-maximize outline / hint.

[David Barth (dbarth)]

A nice to have fix for the release, but not critical to ship.