appDisplay: Bring back drag overshoot region
This is a region where, if hovered while dragging, immediately goes to the previous or next page. This behavior was lost during the transition to the new app grid layout manager. Bring back the drag overshoot region. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2335>
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@ -43,6 +43,7 @@ const PAGE_PREVIEW_ANIMATION_TIME = 150;
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const PAGE_INDICATOR_FADE_TIME = 200;
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const PAGE_PREVIEW_RATIO = 0.20;
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const OVERSHOOT_THRESHOLD = 20;
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const OVERSHOOT_TIMEOUT = 300;
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const DELAYED_MOVE_TIMEOUT = 200;
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@ -843,6 +844,23 @@ var BaseAppView = GObject.registerClass({
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this._overshootTimeoutId = 0;
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}
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_dragWithinOvershootRegion(dragEvent) {
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const rtl = this.get_text_direction() === Clutter.TextDirection.RTL;
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const {x, y, targetActor: indicator} = dragEvent;
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const [indicatorX, indicatorY] = indicator.get_transformed_position();
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const [indicatorWidth, indicatorHeight] = indicator.get_transformed_size();
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let overshootX = indicatorX;
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if (indicator === this._nextPageIndicator || rtl)
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overshootX += indicatorWidth - OVERSHOOT_THRESHOLD;
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const overshootBox = new Clutter.ActorBox();
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overshootBox.set_origin(overshootX, indicatorY);
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overshootBox.set_size(OVERSHOOT_THRESHOLD, indicatorHeight);
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return overshootBox.contains(x, y);
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}
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_handleDragOvershoot(dragEvent) {
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// Already animating
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if (this._adjustment.get_transition('value') !== null)
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@ -868,6 +886,13 @@ var BaseAppView = GObject.registerClass({
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if (targetPage < 0 || targetPage >= this._grid.nPages)
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return; // don't go beyond first/last page
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// If dragging over the drag overshoot threshold region, immediately
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// switch pages
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if (this._dragWithinOvershootRegion(dragEvent)) {
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this._resetOvershoot();
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this.goToPage(targetPage);
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}
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this._overshootTimeoutId =
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GLib.timeout_add(GLib.PRIORITY_DEFAULT, OVERSHOOT_TIMEOUT, () => {
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this._resetOvershoot();
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