appIcon: Make AppIcon a drop target
Because the Dash icons are not drop targets themselves, add a tiny DashIcon class, which is an AppDisplay.AppIcon subclass, and disable all DND drop code from it. Show a folder preview when dragging an app icon over another app icon. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/671
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@ -1743,6 +1743,9 @@ var AppIcon = class AppIcon {
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this.actor._delegate = this;
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this._hasDndHover = false;
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this._folderPreviewId = 0;
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// Get the isDraggable property without passing it on to the BaseIcon:
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let appIconParams = Params.parse(iconParams, { isDraggable: true }, true);
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let isDraggable = appIconParams['isDraggable'];
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@ -1783,6 +1786,9 @@ var AppIcon = class AppIcon {
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});
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}
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Main.overview.connect('item-drag-begin', this._onDragBegin.bind(this));
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Main.overview.connect('item-drag-end', this._onDragEnd.bind(this));
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this.actor.connect('destroy', this._onDestroy.bind(this));
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this._menuTimeoutId = 0;
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@ -1793,6 +1799,10 @@ var AppIcon = class AppIcon {
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}
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_onDestroy() {
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if (this._folderPreviewId > 0) {
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GLib.source_remove(this._folderPreviewId);
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this._folderPreviewId = 0;
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}
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if (this._stateChangedId > 0)
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this.app.disconnect(this._stateChangedId);
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if (this._draggable && this._dragging) {
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@ -1992,6 +2002,97 @@ var AppIcon = class AppIcon {
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opacity: 255
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});
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}
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_showFolderPreview() {
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this.icon.label.opacity = 0;
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this.icon.icon.ease({
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scale_x: FOLDER_SUBICON_FRACTION,
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scale_y: FOLDER_SUBICON_FRACTION
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});
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}
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_hideFolderPreview() {
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this.icon.label.opacity = 255;
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this.icon.icon.ease({
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scale_x: 1.0,
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scale_y: 1.0
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});
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}
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_canAccept(source) {
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let view = _getViewFromIcon(source);
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return source != this &&
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(source instanceof AppIcon) &&
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(view instanceof AllView);
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}
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_setHoveringByDnd(hovering) {
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if (hovering) {
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if (this._folderPreviewId > 0)
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return;
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this._folderPreviewId =
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GLib.timeout_add(GLib.PRIORITY_DEFAULT, 500, () => {
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this.actor.add_style_pseudo_class('drop');
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this._showFolderPreview();
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this._folderPreviewId = 0;
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return GLib.SOURCE_REMOVE;
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});
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} else {
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if (this._folderPreviewId > 0) {
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GLib.source_remove(this._folderPreviewId);
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this._folderPreviewId = 0;
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}
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this._hideFolderPreview();
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this.actor.remove_style_pseudo_class('drop');
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}
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}
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_onDragBegin() {
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this._dragMonitor = {
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dragMotion: this._onDragMotion.bind(this),
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};
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DND.addDragMonitor(this._dragMonitor);
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}
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_onDragMotion(dragEvent) {
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let target = dragEvent.targetActor;
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let isHovering = target == this.actor || this.actor.contains(target);
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let canDrop = this._canAccept(dragEvent.source);
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let hasDndHover = isHovering && canDrop;
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if (this._hasDndHover != hasDndHover) {
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this._setHoveringByDnd(hasDndHover);
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this._hasDndHover = hasDndHover;
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}
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return DND.DragMotionResult.CONTINUE;
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}
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_onDragEnd() {
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this.actor.remove_style_pseudo_class('drop');
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DND.removeDragMonitor(this._dragMonitor);
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}
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handleDragOver(source) {
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if (source == this)
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return DND.DragMotionResult.NO_DROP;
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if (!this._canAccept(source))
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return DND.DragMotionResult.CONTINUE;
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return DND.DragMotionResult.MOVE_DROP;
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}
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acceptDrop(source) {
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this._setHoveringByDnd(false);
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if (!this._canAccept(source))
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return false;
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return true;
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}
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};
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Signals.addSignalMethods(AppIcon.prototype);
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@ -24,6 +24,30 @@ function getAppFromSource(source) {
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}
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}
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var DashIcon = class DashIcon extends AppDisplay.AppIcon {
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constructor(app) {
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super(app, {
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setSizeManually: true,
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showLabel: false
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});
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}
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// Disable all DnD methods
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_onDragBegin() {
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}
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_onDragEnd() {
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}
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handleDragOver() {
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return DND.DragMotionResult.CONTINUE;
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}
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acceptDrop() {
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return false;
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}
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};
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// A container like StBin, but taking the child's scale into account
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// when requesting a size
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var DashItemContainer = GObject.registerClass(
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@ -450,9 +474,7 @@ var Dash = class Dash {
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}
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_createAppItem(app) {
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let appIcon = new AppDisplay.AppIcon(app,
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{ setSizeManually: true,
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showLabel: false });
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let appIcon = new DashIcon(app);
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appIcon.connect('menu-state-changed',
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(appIcon, opened) => {
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