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Simplify event handling code.

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This commit is contained in:
Jürg Lehni 2011-11-16 23:41:47 +01:00
parent 80d3763c39
commit 9061daa935
2 changed files with 24 additions and 20 deletions
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31
src/ui/CanvasView.js
View file

@ -81,6 +81,23 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
doubleClick,
clickTime;
function callEvent(type, point, target, event, bubble) {
var item = target,
mouseEvent,
called = false;
while (item) {
if (item.responds(type)) {
if (!mouseEvent)
mouseEvent = new MouseEvent(type, point, target, event);
called = item.fire(type, mouseEvent) || called;
if (called && (!bubble || mouseEvent._stopped))
break;
}
item = item.getParent();
}
return called;
}
function handleEvent(view, type, event, point) {
if (view._eventCounters[type]) {
var hit = view._project.hitTest(point, hitOptions),
@ -89,7 +106,7 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
// If we have a downItem with a mousedrag event, do not send
// mousemove events to any item while we're dragging.
if (type != 'mousemove' || !downItem)
new MouseEvent(type, point, item, event)._call();
callEvent(type, point, item, event);
return item;
}
}
@ -111,11 +128,11 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
// If we had a mousedrag event locking mousemove events and are over
// another item, send it a mousemove event now
if (hasDrag && item != downItem)
new MouseEvent('mousemove', point, item, event)._call();
callEvent('mousemove', point, item, event);
if (item == downItem) {
clickTime = Date.now();
new MouseEvent(doubleClick ? 'doubleclick' : 'click', downPoint,
overItem, event)._call();
callEvent(doubleClick ? 'doubleclick' : 'click', downPoint,
overItem, event);
doubleClick = false;
}
downItem = null;
@ -125,12 +142,12 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
_onMouseMove: function(event, point) {
// Call the mousedrag event first if an item was clicked earlier
if (downItem)
new MouseEvent('mousedrag', point, downItem, event)._call();
callEvent('mousedrag', point, downItem, event);
var item = handleEvent(this, 'mousemove', event, point);
if (item != overItem) {
new MouseEvent('mouseleave', point, overItem, event)._call();
callEvent('mouseleave', point, overItem, event);
overItem = item;
new MouseEvent('mouseenter', point, item, event)._call();
callEvent('mouseenter', point, item, event);
}
}
};

13
src/ui/MouseEvent.js
View file

@ -36,18 +36,5 @@ var MouseEvent = this.MouseEvent = Event.extend(/** @lends MouseEvent# */{
+ ', target: ' + this.target
+ ', modifiers: ' + this.getModifiers()
+ ' }';
},
// TODO: Move to Event perhaps?
_call: function(bubble) {
var item = this.target,
called = false;
while (item) {
called = item.fire(this.type, this) || called;
if (called && (!bubble || this._stopped))
break;
item = item.getParent();
}
return called;
}
});