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[AppSwitcher] Use GenericContainer instead of BigBox.

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This allows defining some custom policy for size allocation.
Currently, the minimum width is always used, but it can be tweaked
afterwards when a sizing policy has been defined.

https://bugzilla.gnome.org/show_bug.cgi?id=590563
This commit is contained in:
Steve Frécinaux 2009-09-30 11:28:32 +02:00
parent abdd8b330c
commit 68e8b14b8b
1 changed files with 62 additions and 3 deletions
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65
js/ui/altTab.js
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@ -36,8 +36,16 @@ AltTabPopup.prototype = {
reactive: true });
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this._appsBox = new Big.Box({ spacing: POPUP_APPS_BOX_SPACING,
orientation: Big.BoxOrientation.HORIZONTAL });
// Here we use a GenericContainer instead of a BigBox in order to be
// able to handle allocation. In particular, we want all the alt+tab
// popup items to be the same size.
this._appsBox = new Shell.GenericContainer();
this._appsBox.spacing = POPUP_APPS_BOX_SPACING;
this._appsBox.connect('get-preferred-width', Lang.bind(this, this._appsBoxGetPreferredWidth));
this._appsBox.connect('get-preferred-height', Lang.bind(this, this._appsBoxGetPreferredHeight));
this._appsBox.connect('allocate', Lang.bind(this, this._appsBoxAllocate));
let gcenterbox = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL,
x_align: Big.BoxAlignment.CENTER });
gcenterbox.append(this._appsBox, Big.BoxPackFlags.NONE);
@ -69,7 +77,7 @@ AltTabPopup.prototype = {
this._icons.push(appIcon);
this._currentWindows.push(appIcon.windows[0]);
this._appsBox.append(appIcon.actor, Big.BoxPackFlags.NONE);
this._appsBox.add_actor(appIcon.actor);
},
show : function(initialSelection) {
@ -174,6 +182,57 @@ AltTabPopup.prototype = {
}
},
_appsBoxGetPreferredWidth: function (actor, forHeight, alloc) {
let children = this._appsBox.get_children();
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < children.length; i++) {
let [childMin, childNat] = children[i].get_preferred_width(forHeight);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
let totalSpacing = this._appsBox.spacing * (children.length - 1);
alloc.min_size = children.length * maxChildMin + totalSpacing;
alloc.nat_size = children.length * maxChildNat + totalSpacing;
},
_appsBoxGetPreferredHeight: function (actor, forWidth, alloc) {
let children = this._appsBox.get_children();
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < children.length; i++) {
let [childMin, childNat] = children[i].get_preferred_height(forWidth);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
alloc.min_size = maxChildMin;
alloc.nat_size = maxChildNat;
},
_appsBoxAllocate: function (actor, box, flags) {
let children = this._appsBox.get_children();
let totalSpacing = this._appsBox.spacing * (children.length - 1);
let childHeight = box.y2 - box.y1;
let childWidth = Math.max(0, box.x2 - box.x1 - totalSpacing) / children.length;
let x = box.x1;
for (let i = 0; i < children.length; i++) {
let [childMin, childNat] = children[i].get_preferred_height(childWidth);
let vSpacing = (childHeight - childNat) / 2;
let childBox = new Clutter.ActorBox();
childBox.x1 = x;
childBox.y1 = vSpacing;
childBox.x2 = x + childWidth;
childBox.y2 = childHeight - vSpacing;
children[i].allocate(childBox, flags);
x += this._appsBox.spacing + childWidth;
}
},
_keyPressEvent : function(actor, event) {
let keysym = event.get_key_symbol();
let backwards = (event.get_state() & Clutter.ModifierType.SHIFT_MASK);