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Layer: implement moveAbove / moveBelow / nextSibling / previousSibling

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This commit is contained in:
Jonathan Puckey 2011-02-16 18:55:12 +01:00
parent a7dc48951d
commit 3e2b4adc27
1 changed files with 57 additions and 1 deletions
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58
src/item/Layer.js
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@ -3,7 +3,7 @@ Layer = Item.extend({
initialize: function() {
this.children = [];
this.document = this.parent = Paper.document;
this.document = Paper.document;
this.document.layers.push(this);
this.activate();
},
@ -12,6 +12,62 @@ Layer = Item.extend({
return !this.parent ? this.document.layers.indexOf(this) : this.base();
},
/**
* Removes the layer from its document's layers list
* or its parent's children list.
*/
removeFromParent: function() {
if(!this.parent) {
this.document.layers.splice(this.index, 1);
} else {
this.base();
}
},
moveAbove: function(item) {
// if the item is a layer and contained within Document#layers
if(item instanceof Layer && !item.parent) {
this.removeFromParent();
item.document.layers.splice(item.index + 1, 0, this);
this.document = item.document;
return true;
} else {
this.base(item);
}
},
moveBelow: function(item) {
// if the item is a layer and contained within Document#layers
if(item instanceof Layer && !item.parent) {
this.removeFromParent();
item.document.layers.splice(item.index - 1, 0, this);
this.document = item.document;
return true;
} else {
this.base(item);
}
},
getNextSibling: function() {
if(!this.parent) {
var index = this.index + 1;
if (index < this.document.layers.length)
return this.document.layers[index];
} else {
return this.base();
}
},
getPreviousSibling: function() {
if(!this.parent) {
var index = this.index - 1;
if (index <= 0)
return this.document.layers[index];
} else {
return this.base();
}
},
activate: function() {
this.document.activeLayer = this;
},