102 lines
2.4 KiB
JavaScript
102 lines
2.4 KiB
JavaScript
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/**
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* Copyright (c) 2006-2015, JGraph Ltd
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* Copyright (c) 2006-2015, Gaudenz Alder
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*/
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/**
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* Class: mxCompositeLayout
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*
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* Allows to compose multiple layouts into a single layout. The master layout
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* is the layout that handles move operations if another layout than the first
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* element in <layouts> should be used. The <master> layout is not executed as
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* the code assumes that it is part of <layouts>.
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*
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* Example:
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* (code)
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* var first = new mxFastOrganicLayout(graph);
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* var second = new mxParallelEdgeLayout(graph);
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* var layout = new mxCompositeLayout(graph, [first, second], first);
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* layout.execute(graph.getDefaultParent());
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* (end)
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*
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* Constructor: mxCompositeLayout
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*
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* Constructs a new layout using the given layouts. The graph instance is
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* required for creating the transaction that contains all layouts.
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*
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* Arguments:
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*
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* graph - Reference to the enclosing <mxGraph>.
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* layouts - Array of <mxGraphLayouts>.
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* master - Optional layout that handles moves. If no layout is given then
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* the first layout of the above array is used to handle moves.
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*/
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function mxCompositeLayout(graph, layouts, master)
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{
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mxGraphLayout.call(this, graph);
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this.layouts = layouts;
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this.master = master;
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};
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/**
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* Extends mxGraphLayout.
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*/
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mxCompositeLayout.prototype = new mxGraphLayout();
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mxCompositeLayout.prototype.constructor = mxCompositeLayout;
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/**
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* Variable: layouts
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*
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* Holds the array of <mxGraphLayouts> that this layout contains.
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*/
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mxCompositeLayout.prototype.layouts = null;
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/**
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* Variable: master
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*
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* Reference to the <mxGraphLayouts> that handles moves. If this is null
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* then the first layout in <layouts> is used.
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*/
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mxCompositeLayout.prototype.master = null;
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/**
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* Function: moveCell
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*
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* Implements <mxGraphLayout.moveCell> by calling move on <master> or the first
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* layout in <layouts>.
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*/
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mxCompositeLayout.prototype.moveCell = function(cell, x, y)
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{
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if (this.master != null)
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{
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this.master.moveCell.apply(this.master, arguments);
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}
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else
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{
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this.layouts[0].moveCell.apply(this.layouts[0], arguments);
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}
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};
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/**
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* Function: execute
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*
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* Implements <mxGraphLayout.execute> by executing all <layouts> in a
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* single transaction.
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*/
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mxCompositeLayout.prototype.execute = function(parent)
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{
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var model = this.graph.getModel();
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model.beginUpdate();
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try
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{
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for (var i = 0; i < this.layouts.length; i++)
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{
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this.layouts[i].execute.apply(this.layouts[i], arguments);
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}
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}
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finally
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{
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model.endUpdate();
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}
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};
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