Thumbnails: show wallpaper

[romgrk]

Current thumbnails have a grey background instead of the wallpaper.

[RensAlthuis]

I've already looked into this a bit, apparently not as straight forward as I'd hoped. But it's high on the list of things to fix.

[romgrk]

That would need to be done in workspaceThumbnails.js, right? I'll try to take a look at it later.

[RensAlthuis]

Yeah, you'd need to figure out how to load the background image and display it on each thumbnail behind the windows.

[romgrk]

Yeah ok so you know what I've looked at this and it's not as easy as it seems.

[romgrk]

Ok, I think I got it, see the PR there.

[blipk]

I've been using this with my extension Customised Workspaces https://github.com/blipk/Customised-Workspaces which restores the wallpaper and allows setting a different one for each workspace.

It's enough to change _addWindowClone:

this.addInjection('workspaceThumbnail.ThumbnailsBox.prototype._addWindowClone',
  function(win) {
    let clone = new workspaceThumbnail.ThumbnailsBox.WindowClone(win);
    clone.connect('selected', (o, time) => { this.activate(time); });
    clone.connect('drag-begin', () => { Main.overview.beginWindowDrag(clone.metaWindow); });
    clone.connect('drag-cancelled', () => { Main.overview.cancelledWindowDrag(clone.metaWindow); });
    clone.connect('drag-end', () => { Main.overview.endWindowDrag(clone.metaWindow); });
    clone.connect('destroy', () => { this._removeWindowClone(clone.metaWindow); });
    this._contents.add_actor(clone);
    if (this._windows.length == 0) clone.setStackAbove(this._bgManager.backgroundActor);
    else clone.setStackAbove(this._windows[this._windows.length - 1]);
    this._windows.push(clone);
  return clone;        
});

Then something like the following in workspaceThumbnail.ThumbnailsBox.prototype.addThumbnails

_newbg = new Meta.Background({ meta_display: global.screen || global.display });
let bg = extensionUtils.getSettings('org.gnome.desktop.background').get_string('picture-uri').replace("file://", "");
_newbg.set_file(Gio.file_new_for_path(bg), imports.gi.GDesktopEnums.BackgroundStyle.ZOOM);

if (!thumbnailBox._bgManager)
    thumbnailBox._bgManager = new background.BackgroundManager({ monitorIndex: Main.layoutManager.primaryIndex,
                                                                    container: thumbnailBox._contents,
                                                                    vignette: false });

thumbnailBox._bgManager.backgroundActor.content.background = thumbnailBox._newbg;