mxgraph
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mxGraph is a fully client side JavaScript diagramming library that uses SVG and HTML for rendering.
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JavaScript
/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
/**
* Class: mxStackLayout
*
* Extends <mxGraphLayout> to create a horizontal or vertical stack of the
* child vertices. The children do not need to be connected for this layout
* to work.
*
* Example:
*
* (code)
* var layout = new mxStackLayout(graph, true);
* layout.execute(graph.getDefaultParent());
* (end)
*
* Constructor: mxStackLayout
*
* Constructs a new stack layout layout for the specified graph,
* spacing, orientation and offset.
*/
function mxStackLayout(graph, horizontal, spacing, x0, y0, border)
{
mxGraphLayout.call(this, graph);
this.horizontal = (horizontal != null) ? horizontal : true;
this.spacing = (spacing != null) ? spacing : 0;
this.x0 = (x0 != null) ? x0 : 0;
this.y0 = (y0 != null) ? y0 : 0;
this.border = (border != null) ? border : 0;
};
/**
* Extends mxGraphLayout.
*/
mxStackLayout.prototype = new mxGraphLayout();
mxStackLayout.prototype.constructor = mxStackLayout;
/**
* Variable: horizontal
*
* Specifies the orientation of the layout. Default is true.
*/
mxStackLayout.prototype.horizontal = null;
/**
* Variable: spacing
*
* Specifies the spacing between the cells. Default is 0.
*/
mxStackLayout.prototype.spacing = null;
/**
* Variable: x0
*
* Specifies the horizontal origin of the layout. Default is 0.
*/
mxStackLayout.prototype.x0 = null;
/**
* Variable: y0
*
* Specifies the vertical origin of the layout. Default is 0.
*/
mxStackLayout.prototype.y0 = null;
/**
* Variable: border
*
* Border to be added if fill is true. Default is 0.
*/
mxStackLayout.prototype.border = 0;
/**
* Variable: marginTop
*
* Top margin for the child area. Default is 0.
*/
mxStackLayout.prototype.marginTop = 0;
/**
* Variable: marginLeft
*
* Top margin for the child area. Default is 0.
*/
mxStackLayout.prototype.marginLeft = 0;
/**
* Variable: marginRight
*
* Top margin for the child area. Default is 0.
*/
mxStackLayout.prototype.marginRight = 0;
/**
* Variable: marginBottom
*
* Top margin for the child area. Default is 0.
*/
mxStackLayout.prototype.marginBottom = 0;
/**
* Variable: keepFirstLocation
*
* Boolean indicating if the location of the first cell should be
* kept, that is, it will not be moved to x0 or y0.
*/
mxStackLayout.prototype.keepFirstLocation = false;
/**
* Variable: fill
*
* Boolean indicating if dimension should be changed to fill out the parent
* cell. Default is false.
*/
mxStackLayout.prototype.fill = false;
/**
* Variable: resizeParent
*
* If the parent should be resized to match the width/height of the
* stack. Default is false.
*/
mxStackLayout.prototype.resizeParent = false;
/**
* Variable: resizeParentMax
*
* Use maximum of existing value and new value for resize of parent.
* Default is false.
*/
mxStackLayout.prototype.resizeParentMax = false;
/**
* Variable: resizeLast
*
* If the last element should be resized to fill out the parent. Default is
* false. If <resizeParent> is true then this is ignored.
*/
mxStackLayout.prototype.resizeLast = false;
/**
* Variable: wrap
*
* Value at which a new column or row should be created. Default is null.
*/
mxStackLayout.prototype.wrap = null;
/**
* Variable: borderCollapse
*
* If the strokeWidth should be ignored. Default is true.
*/
mxStackLayout.prototype.borderCollapse = true;
/**
* Function: isHorizontal
*
* Returns <horizontal>.
*/
mxStackLayout.prototype.isHorizontal = function()
{
return this.horizontal;
};
/**
* Function: moveCell
*
* Implements <mxGraphLayout.moveCell>.
*/
mxStackLayout.prototype.moveCell = function(cell, x, y)
{
var model = this.graph.getModel();
var parent = model.getParent(cell);
var horizontal = this.isHorizontal();
if (cell != null && parent != null)
{
var i = 0;
var last = 0;
var childCount = model.getChildCount(parent);
var value = (horizontal) ? x : y;
var pstate = this.graph.getView().getState(parent);
if (pstate != null)
{
value -= (horizontal) ? pstate.x : pstate.y;
}
value /= this.graph.view.scale;
for (i = 0; i < childCount; i++)
{
var child = model.getChildAt(parent, i);
if (child != cell)
{
var bounds = model.getGeometry(child);
if (bounds != null)
{
var tmp = (horizontal) ?
bounds.x + bounds.width / 2 :
bounds.y + bounds.height / 2;
if (last <= value && tmp > value)
{
break;
}
last = tmp;
}
}
}
// Changes child order in parent
var idx = parent.getIndex(cell);
idx = Math.max(0, i - ((i > idx) ? 1 : 0));
model.add(parent, cell, idx);
}
};
/**
* Function: getParentSize
*
* Returns the size for the parent container or the size of the graph
* container if the parent is a layer or the root of the model.
*/
mxStackLayout.prototype.getParentSize = function(parent)
{
var model = this.graph.getModel();
var pgeo = model.getGeometry(parent);
// Handles special case where the parent is either a layer with no
// geometry or the current root of the view in which case the size
// of the graph's container will be used.
if (this.graph.container != null && ((pgeo == null &&
model.isLayer(parent)) || parent == this.graph.getView().currentRoot))
{
var width = this.graph.container.offsetWidth - 1;
var height = this.graph.container.offsetHeight - 1;
pgeo = new mxRectangle(0, 0, width, height);
}
return pgeo;
};
/**
* Function: execute
*
* Implements <mxGraphLayout.execute>.
*
* Only children where <isVertexIgnored> returns false are taken into
* account.
*/
mxStackLayout.prototype.execute = function(parent)
{
if (parent != null)
{
var pgeo = this.getParentSize(parent);
var horizontal = this.isHorizontal();
var model = this.graph.getModel();
var fillValue = null;
if (pgeo != null)
{
fillValue = (horizontal) ? pgeo.height - this.marginTop - this.marginBottom :
pgeo.width - this.marginLeft - this.marginRight;
}
fillValue -= 2 * this.border;
var x0 = this.x0 + this.border + this.marginLeft;
var y0 = this.y0 + this.border + this.marginTop;
// Handles swimlane start size
if (this.graph.isSwimlane(parent))
{
// Uses computed style to get latest
var style = this.graph.getCellStyle(parent);
var start = mxUtils.getNumber(style, mxConstants.STYLE_STARTSIZE, mxConstants.DEFAULT_STARTSIZE);
var horz = mxUtils.getValue(style, mxConstants.STYLE_HORIZONTAL, true) == 1;
if (pgeo != null)
{
if (horz)
{
start = Math.min(start, pgeo.height);
}
else
{
start = Math.min(start, pgeo.width);
}
}
if (horizontal == horz)
{
fillValue -= start;
}
if (horz)
{
y0 += start;
}
else
{
x0 += start;
}
}
model.beginUpdate();
try
{
var tmp = 0;
var last = null;
var lastValue = 0;
var lastChild = null;
var childCount = model.getChildCount(parent);
for (var i = 0; i < childCount; i++)
{
var child = model.getChildAt(parent, i);
if (!this.isVertexIgnored(child) && this.isVertexMovable(child))
{
var geo = model.getGeometry(child);
if (geo != null)
{
geo = geo.clone();
if (this.wrap != null && last != null)
{
if ((horizontal && last.x + last.width +
geo.width + 2 * this.spacing > this.wrap) ||
(!horizontal && last.y + last.height +
geo.height + 2 * this.spacing > this.wrap))
{
last = null;
if (horizontal)
{
y0 += tmp + this.spacing;
}
else
{
x0 += tmp + this.spacing;
}
tmp = 0;
}
}
tmp = Math.max(tmp, (horizontal) ? geo.height : geo.width);
var sw = 0;
if (!this.borderCollapse)
{
var childStyle = this.graph.getCellStyle(child);
sw = mxUtils.getNumber(childStyle, mxConstants.STYLE_STROKEWIDTH, 1);
}
if (last != null)
{
if (horizontal)
{
geo.x = lastValue + this.spacing + Math.floor(sw / 2);
}
else
{
geo.y = lastValue + this.spacing + Math.floor(sw / 2);
}
}
else if (!this.keepFirstLocation)
{
if (horizontal)
{
geo.x = x0;
}
else
{
geo.y = y0;
}
}
if (horizontal)
{
geo.y = y0;
}
else
{
geo.x = x0;
}
if (this.fill && fillValue != null)
{
if (horizontal)
{
geo.height = fillValue;
}
else
{
geo.width = fillValue;
}
}
this.setChildGeometry(child, geo);
lastChild = child;
last = geo;
if (horizontal)
{
lastValue = last.x + last.width + Math.floor(sw / 2);
}
else
{
lastValue = last.y + last.height + Math.floor(sw / 2);
}
}
}
}
if (this.resizeParent && pgeo != null && last != null && !this.graph.isCellCollapsed(parent))
{
this.updateParentGeometry(parent, pgeo, last);
}
else if (this.resizeLast && pgeo != null && last != null && lastChild != null)
{
if (horizontal)
{
last.width = pgeo.width - last.x - this.spacing - this.marginRight - this.marginLeft;
}
else
{
last.height = pgeo.height - last.y - this.spacing - this.marginBottom;
}
this.setChildGeometry(lastChild, last);
}
}
finally
{
model.endUpdate();
}
}
};
/**
* Function: execute
*
* Implements <mxGraphLayout.execute>.
*
* Only children where <isVertexIgnored> returns false are taken into
* account.
*/
mxStackLayout.prototype.setChildGeometry = function(child, geo)
{
var geo2 = this.graph.getCellGeometry(child);
if (geo2 == null || geo.x != geo2.x || geo.y != geo2.y ||
geo.width != geo2.width || geo.height != geo2.height)
{
this.graph.getModel().setGeometry(child, geo);
}
};
/**
* Function: execute
*
* Implements <mxGraphLayout.execute>.
*
* Only children where <isVertexIgnored> returns false are taken into
* account.
*/
mxStackLayout.prototype.updateParentGeometry = function(parent, pgeo, last)
{
var horizontal = this.isHorizontal();
var model = this.graph.getModel();
var pgeo2 = pgeo.clone();
if (horizontal)
{
var tmp = last.x + last.width + this.marginRight + this.border;
if (this.resizeParentMax)
{
pgeo2.width = Math.max(pgeo2.width, tmp);
}
else
{
pgeo2.width = tmp;
}
}
else
{
var tmp = last.y + last.height + this.marginBottom + this.border;
if (this.resizeParentMax)
{
pgeo2.height = Math.max(pgeo2.height, tmp);
}
else
{
pgeo2.height = tmp;
}
}
if (pgeo.x != pgeo2.x || pgeo.y != pgeo2.y ||
pgeo.width != pgeo2.width || pgeo.height != pgeo2.height)
{
model.setGeometry(parent, pgeo2);
}
};
__mxOutput.mxStackLayout = typeof mxStackLayout !== 'undefined' ? mxStackLayout : undefined;