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refactored setAbsolutePosition() method and Shape _draw method

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This commit is contained in:
Eric Rowell
2012-04-14 16:27:00 -07:00
parent 5e46018012
commit df8df63400
7 changed files with 83 additions and 114 deletions
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35
src/Stage.js
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@@ -717,6 +717,10 @@ Kinetic.Stage.prototype = {
var pos = that.getUserPosition();
var dc = node.attrs.dragConstraint;
var db = node.attrs.dragBounds;
var lastNodePos = {
x: node.attrs.x,
y: node.attrs.y
};
// default
var newNodePos = {
@@ -724,28 +728,6 @@ Kinetic.Stage.prototype = {
y: pos.y - go.drag.offset.y
};
/*
* chrome currently has a bug that slows down drag and drop.
* For google chrome instances, dynamically set the dragTimeInterval
* to improve drag and drop performance while not effecting other browsers
*/
//if(go.isChrome) {
/*
* handle dynamice drag time interval. As the distance between
* the mouse and cursor increases, we need to increase the drag
* time interval to reduce the number of layer draws so that
* the node position can catch back up to the cursor. When the difference
* is zero, the time interval is zero. When the difference approahces
* infinity, the time interval approaches the max drag time interval
*/
/*
var dragDiffX = Math.abs(newNodePos.x - node.attrs.x);
var dragDiffY = Math.abs(newNodePos.y - node.attrs.y);
var dragDiff = Math.sqrt(Math.pow(dragDiffX, 2) + Math.pow(dragDiffY, 2));
go.dragTimeInterval = go.maxDragTimeInterval * (dragDiff - 1) / (dragDiff + 1);
*/
//}
// bounds overrides
if(db.left !== undefined && newNodePos.x < db.left) {
newNodePos.x = db.left;
@@ -760,17 +742,16 @@ Kinetic.Stage.prototype = {
newNodePos.y = db.bottom;
}
node.setAbsolutePosition(newNodePos);
// constraint overrides
var override = {};
if(dc === 'horizontal') {
override.y = node.attrs.y;
node.attrs.y = lastNodePos.y;
}
else if(dc === 'vertical') {
override.x = node.attrs.x;
node.attrs.x = lastNodePos.x;
}
node.setAbsolutePosition(newNodePos, override);
go.drag.node.getLayer().draw();
if(!go.drag.moving) {