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PopupSliderMenuItem: Implement mousewheel support

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Allow changing the slider's value using the mousewheel.

https://bugzilla.gnome.org/show_bug.cgi?id=632743
This commit is contained in:
Adel Gadllah 2010-10-20 22:41:54 +02:00
parent 8886b7433c
commit 3dbee0b833
1 changed files with 17 additions and 0 deletions
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17
js/ui/popupMenu.js
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@ -16,6 +16,8 @@ const Tweener = imports.ui.tweener;
const Gettext = imports.gettext.domain('gnome-shell');
const _ = Gettext.gettext;
const SLIDER_SCROLL_STEP = 0.05; /* Slider scrolling step in % */
function Switch() {
this._init.apply(this, arguments);
}
@ -181,6 +183,7 @@ PopupSliderMenuItem.prototype = {
this.actor.set_child(this._slider);
this._slider.connect('repaint', Lang.bind(this, this._sliderRepaint));
this._slider.connect('button-press-event', Lang.bind(this, this._startDragging));
this._slider.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
this._releaseId = this._motionId = 0;
this._dragging = false;
@ -270,6 +273,20 @@ PopupSliderMenuItem.prototype = {
return true;
},
_onScrollEvent: function (actor, event) {
let direction = event.get_scroll_direction();
if (direction == Clutter.ScrollDirection.DOWN) {
this._value = Math.max(0, this._value - SLIDER_SCROLL_STEP);
}
else if (direction == Clutter.ScrollDirection.UP) {
this._value = Math.min(1, this._value + SLIDER_SCROLL_STEP);
}
this._slider.queue_repaint();
this.emit('value-changed', this._value);
},
_motionEvent: function(actor, event) {
let absX, absY;
[absX, absY] = event.get_coords();