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Bug 487946 - scrollwheel scrolling in bookmarks menu slowed down. r=enn

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This commit is contained in:
Dão Gottwald 2009-04-14 08:37:26 +02:00
parent 5a9afe7d24
commit 6aef714b19
1 changed files with 18 additions and 3 deletions
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21
toolkit/content/widgets/scrollbox.xml
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@ -168,6 +168,8 @@
document.defaultView.getComputedStyle(this._scrollbox, "").direction == "rtl";
]]></field>
<field name="_scrollTarget">null</field>
<method name="ensureElementIsVisible">
<parameter name="element"/>
<parameter name="aSmoothScroll"/>
@ -200,10 +202,12 @@
this._stopSmoothScroll();
if (aSmoothScroll != false && this.smoothScroll)
if (aSmoothScroll != false && this.smoothScroll) {
this._scrollTarget = element;
this._smoothScrollByPixels(amountToScroll);
else
} else {
this.scrollByPixels(amountToScroll);
}
]]></body>
</method>
@ -303,7 +307,7 @@
<body><![CDATA[
var elements = this._getScrollableElements();
if (!elements.length)
return;
return null;
if (this._isRTLScrollbox) {
elements = Array.slice(elements);
@ -377,6 +381,7 @@
if (this._isScrolling) {
clearInterval(this._smoothScrollTimer);
this._isScrolling = 0;
this._scrollTarget = null;
}
]]></body>
</method>
@ -426,6 +431,16 @@
// because many users have a vertical scroll wheel but no
// horizontal support.
// Each mouse scroll is expected to scroll event.detail items. If a
// previous scroll is still in progress because of smooth scrolling,
// we need to complete it before starting a new one.
if (this._scrollTarget) {
let elements = this._getScrollableElements();
if (this._scrollTarget != elements[0] &&
this._scrollTarget != elements[elements.length - 1])
this.ensureElementIsVisible(this._scrollTarget, false);
}
this.scrollByIndex(event.detail);
event.stopPropagation();
]]></handler>