Mon 21 Jul 22:43:21 CEST 2025
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js/ui/mxgraph/src/js/layout/mxStackLayout.js
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515
js/ui/mxgraph/src/js/layout/mxStackLayout.js
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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: mxStackLayout
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*
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* Extends <mxGraphLayout> to create a horizontal or vertical stack of the
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* child vertices. The children do not need to be connected for this layout
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* to work.
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*
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* Example:
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*
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* (code)
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* var layout = new mxStackLayout(graph, true);
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* layout.execute(graph.getDefaultParent());
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* (end)
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*
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* Constructor: mxStackLayout
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*
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* Constructs a new stack layout layout for the specified graph,
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* spacing, orientation and offset.
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*/
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function mxStackLayout(graph, horizontal, spacing, x0, y0, border)
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{
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mxGraphLayout.call(this, graph);
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this.horizontal = (horizontal != null) ? horizontal : true;
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this.spacing = (spacing != null) ? spacing : 0;
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this.x0 = (x0 != null) ? x0 : 0;
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this.y0 = (y0 != null) ? y0 : 0;
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this.border = (border != null) ? border : 0;
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};
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/**
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* Extends mxGraphLayout.
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*/
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mxStackLayout.prototype = new mxGraphLayout();
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mxStackLayout.prototype.constructor = mxStackLayout;
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/**
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* Variable: horizontal
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*
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* Specifies the orientation of the layout. Default is true.
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*/
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mxStackLayout.prototype.horizontal = null;
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/**
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* Variable: spacing
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*
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* Specifies the spacing between the cells. Default is 0.
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*/
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mxStackLayout.prototype.spacing = null;
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/**
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* Variable: x0
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*
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* Specifies the horizontal origin of the layout. Default is 0.
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*/
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mxStackLayout.prototype.x0 = null;
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/**
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* Variable: y0
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*
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* Specifies the vertical origin of the layout. Default is 0.
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*/
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mxStackLayout.prototype.y0 = null;
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/**
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* Variable: border
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*
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* Border to be added if fill is true. Default is 0.
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*/
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mxStackLayout.prototype.border = 0;
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/**
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* Variable: marginTop
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*
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* Top margin for the child area. Default is 0.
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*/
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mxStackLayout.prototype.marginTop = 0;
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/**
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* Variable: marginLeft
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*
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* Top margin for the child area. Default is 0.
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*/
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mxStackLayout.prototype.marginLeft = 0;
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/**
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* Variable: marginRight
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*
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* Top margin for the child area. Default is 0.
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*/
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mxStackLayout.prototype.marginRight = 0;
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/**
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* Variable: marginBottom
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*
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* Top margin for the child area. Default is 0.
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*/
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mxStackLayout.prototype.marginBottom = 0;
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/**
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* Variable: keepFirstLocation
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*
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* Boolean indicating if the location of the first cell should be
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* kept, that is, it will not be moved to x0 or y0.
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*/
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mxStackLayout.prototype.keepFirstLocation = false;
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/**
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* Variable: fill
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*
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* Boolean indicating if dimension should be changed to fill out the parent
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* cell. Default is false.
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*/
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mxStackLayout.prototype.fill = false;
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/**
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* Variable: resizeParent
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*
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* If the parent should be resized to match the width/height of the
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* stack. Default is false.
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*/
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mxStackLayout.prototype.resizeParent = false;
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/**
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* Variable: resizeParentMax
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*
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* Use maximum of existing value and new value for resize of parent.
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* Default is false.
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*/
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mxStackLayout.prototype.resizeParentMax = false;
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/**
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* Variable: resizeLast
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*
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* If the last element should be resized to fill out the parent. Default is
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* false. If <resizeParent> is true then this is ignored.
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*/
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mxStackLayout.prototype.resizeLast = false;
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/**
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* Variable: wrap
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*
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* Value at which a new column or row should be created. Default is null.
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*/
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mxStackLayout.prototype.wrap = null;
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/**
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* Variable: borderCollapse
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*
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* If the strokeWidth should be ignored. Default is true.
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*/
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mxStackLayout.prototype.borderCollapse = true;
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/**
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* Function: isHorizontal
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*
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* Returns <horizontal>.
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*/
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mxStackLayout.prototype.isHorizontal = function()
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{
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return this.horizontal;
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};
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/**
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* Function: moveCell
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*
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* Implements <mxGraphLayout.moveCell>.
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*/
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mxStackLayout.prototype.moveCell = function(cell, x, y)
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{
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var model = this.graph.getModel();
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var parent = model.getParent(cell);
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var horizontal = this.isHorizontal();
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if (cell != null && parent != null)
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{
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var i = 0;
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var last = 0;
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var childCount = model.getChildCount(parent);
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var value = (horizontal) ? x : y;
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var pstate = this.graph.getView().getState(parent);
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if (pstate != null)
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{
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value -= (horizontal) ? pstate.x : pstate.y;
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}
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value /= this.graph.view.scale;
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for (i = 0; i < childCount; i++)
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{
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var child = model.getChildAt(parent, i);
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if (child != cell)
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{
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var bounds = model.getGeometry(child);
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if (bounds != null)
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{
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var tmp = (horizontal) ?
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bounds.x + bounds.width / 2 :
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bounds.y + bounds.height / 2;
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if (last <= value && tmp > value)
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{
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break;
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}
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last = tmp;
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}
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}
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}
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// Changes child order in parent
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var idx = parent.getIndex(cell);
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idx = Math.max(0, i - ((i > idx) ? 1 : 0));
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model.add(parent, cell, idx);
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}
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};
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/**
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* Function: getParentSize
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*
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* Returns the size for the parent container or the size of the graph
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* container if the parent is a layer or the root of the model.
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*/
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mxStackLayout.prototype.getParentSize = function(parent)
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{
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var model = this.graph.getModel();
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var pgeo = model.getGeometry(parent);
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// Handles special case where the parent is either a layer with no
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// geometry or the current root of the view in which case the size
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// of the graph's container will be used.
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if (this.graph.container != null && ((pgeo == null &&
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model.isLayer(parent)) || parent == this.graph.getView().currentRoot))
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{
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var width = this.graph.container.offsetWidth - 1;
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var height = this.graph.container.offsetHeight - 1;
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pgeo = new mxRectangle(0, 0, width, height);
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}
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return pgeo;
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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>.
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*
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* Only children where <isVertexIgnored> returns false are taken into
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* account.
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*/
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mxStackLayout.prototype.execute = function(parent)
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{
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if (parent != null)
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{
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var pgeo = this.getParentSize(parent);
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var horizontal = this.isHorizontal();
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var model = this.graph.getModel();
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var fillValue = null;
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if (pgeo != null)
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{
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fillValue = (horizontal) ? pgeo.height - this.marginTop - this.marginBottom :
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pgeo.width - this.marginLeft - this.marginRight;
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}
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fillValue -= 2 * this.spacing + 2 * this.border;
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var x0 = this.x0 + this.border + this.marginLeft;
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var y0 = this.y0 + this.border + this.marginTop;
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// Handles swimlane start size
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if (this.graph.isSwimlane(parent))
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{
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// Uses computed style to get latest
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var style = this.graph.getCellStyle(parent);
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var start = mxUtils.getNumber(style, mxConstants.STYLE_STARTSIZE, mxConstants.DEFAULT_STARTSIZE);
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var horz = mxUtils.getValue(style, mxConstants.STYLE_HORIZONTAL, true) == 1;
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if (pgeo != null)
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{
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if (horz)
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{
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start = Math.min(start, pgeo.height);
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}
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else
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{
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start = Math.min(start, pgeo.width);
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}
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}
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if (horizontal == horz)
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{
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fillValue -= start;
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}
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if (horz)
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{
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y0 += start;
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}
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else
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{
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x0 += start;
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}
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}
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model.beginUpdate();
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try
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{
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var tmp = 0;
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var last = null;
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var lastValue = 0;
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var lastChild = null;
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var childCount = model.getChildCount(parent);
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for (var i = 0; i < childCount; i++)
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{
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var child = model.getChildAt(parent, i);
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if (!this.isVertexIgnored(child) && this.isVertexMovable(child))
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{
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var geo = model.getGeometry(child);
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if (geo != null)
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{
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geo = geo.clone();
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if (this.wrap != null && last != null)
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{
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if ((horizontal && last.x + last.width +
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geo.width + 2 * this.spacing > this.wrap) ||
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(!horizontal && last.y + last.height +
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geo.height + 2 * this.spacing > this.wrap))
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{
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last = null;
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if (horizontal)
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{
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y0 += tmp + this.spacing;
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}
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else
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{
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x0 += tmp + this.spacing;
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}
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tmp = 0;
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}
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}
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tmp = Math.max(tmp, (horizontal) ? geo.height : geo.width);
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var sw = 0;
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if (!this.borderCollapse)
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{
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var childStyle = this.graph.getCellStyle(child);
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sw = mxUtils.getNumber(childStyle, mxConstants.STYLE_STROKEWIDTH, 1);
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}
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if (last != null)
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{
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if (horizontal)
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{
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geo.x = lastValue + this.spacing + Math.floor(sw / 2);
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}
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else
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{
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geo.y = lastValue + this.spacing + Math.floor(sw / 2);
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}
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}
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else if (!this.keepFirstLocation)
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{
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if (horizontal)
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{
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geo.x = x0;
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}
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else
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{
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geo.y = y0;
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}
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}
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if (horizontal)
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{
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geo.y = y0;
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}
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else
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{
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geo.x = x0;
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}
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if (this.fill && fillValue != null)
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{
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if (horizontal)
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{
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geo.height = fillValue;
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}
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else
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{
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geo.width = fillValue;
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}
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}
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this.setChildGeometry(child, geo);
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lastChild = child;
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last = geo;
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if (horizontal)
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{
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lastValue = last.x + last.width + Math.floor(sw / 2);
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}
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else
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{
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lastValue = last.y + last.height + Math.floor(sw / 2);
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}
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}
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}
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}
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if (this.resizeParent && pgeo != null && last != null && !this.graph.isCellCollapsed(parent))
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{
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this.updateParentGeometry(parent, pgeo, last);
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}
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else if (this.resizeLast && pgeo != null && last != null && lastChild != null)
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{
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if (horizontal)
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{
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last.width = pgeo.width - last.x - this.spacing - this.marginRight - this.marginLeft;
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}
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else
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{
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last.height = pgeo.height - last.y - this.spacing - this.marginBottom;
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}
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this.setChildGeometry(lastChild, last);
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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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};
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/**
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* Function: execute
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*
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* Implements <mxGraphLayout.execute>.
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*
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* Only children where <isVertexIgnored> returns false are taken into
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* account.
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*/
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mxStackLayout.prototype.setChildGeometry = function(child, geo)
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{
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var geo2 = this.graph.getCellGeometry(child);
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if (geo2 == null || geo.x != geo2.x || geo.y != geo2.y ||
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geo.width != geo2.width || geo.height != geo2.height)
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{
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this.graph.getModel().setGeometry(child, geo);
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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>.
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*
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* Only children where <isVertexIgnored> returns false are taken into
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* account.
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*/
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mxStackLayout.prototype.updateParentGeometry = function(parent, pgeo, last)
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{
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var horizontal = this.isHorizontal();
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var model = this.graph.getModel();
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var pgeo2 = pgeo.clone();
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if (horizontal)
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{
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var tmp = last.x + last.width + this.spacing + this.marginRight;
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if (this.resizeParentMax)
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{
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pgeo2.width = Math.max(pgeo2.width, tmp);
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}
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else
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{
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pgeo2.width = tmp;
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}
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}
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else
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{
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var tmp = last.y + last.height + this.spacing + this.marginBottom;
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if (this.resizeParentMax)
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{
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pgeo2.height = Math.max(pgeo2.height, tmp);
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}
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else
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{
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pgeo2.height = tmp;
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}
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}
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if (pgeo.x != pgeo2.x || pgeo.y != pgeo2.y ||
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pgeo.width != pgeo2.width || pgeo.height != pgeo2.height)
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{
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model.setGeometry(parent, pgeo2);
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}
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};
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