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Implement Item#onMouseDrag evnets, and have them silence #onMouseMove events if both are present.

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This commit is contained in:
Jürg Lehni 2011-11-16 23:30:14 +01:00
parent d066ad775d
commit 80d3763c39
1 changed files with 25 additions and 10 deletions
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35
src/ui/CanvasView.js
View file

@ -74,22 +74,27 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
tolerance: 0
};
function handleEvent(view, type, event, point) {
if (view._eventCounters[type]) {
var hit = view._project.hitTest(point, hitOptions);
if (hit && hit.item) {
new MouseEvent(type, point, hit.item, event)._call();
return hit.item;
}
}
}
var downPoint,
downItem,
hasDrag,
overItem,
doubleClick,
clickTime;
function handleEvent(view, type, event, point) {
if (view._eventCounters[type]) {
var hit = view._project.hitTest(point, hitOptions),
item = hit && hit.item;
if (item) {
// 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();
return item;
}
}
}
return {
_onMouseDown: function(event, point) {
var item = handleEvent(this, 'mousedown', event, point);
@ -98,19 +103,29 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
doubleClick = downItem == item && Date.now() - clickTime < 300;
downItem = item;
downPoint = point;
hasDrag = downItem && downItem.responds('mousedrag');
},
_onMouseUp: function(event, point) {
var item = handleEvent(this, 'mouseup', event, point);
// 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();
if (item == downItem) {
clickTime = Date.now();
new MouseEvent(doubleClick ? 'doubleclick' : 'click', downPoint,
overItem, event)._call();
doubleClick = false;
}
downItem = null;
hasDrag = false;
},
_onMouseMove: function(event, point) {
// Call the mousedrag event first if an item was clicked earlier
if (downItem)
new MouseEvent('mousedrag', point, downItem, event)._call();
var item = handleEvent(this, 'mousemove', event, point);
if (item != overItem) {
new MouseEvent('mouseleave', point, overItem, event)._call();