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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.4.0
* Copyright(c) 2006-2011 Sencha Inc.
* licensing@sencha.com
* http://www.sencha.com/license
*/
<div id="cls-Ext.layout.ColumnLayout"></div>/**
* @class Ext.layout.ColumnLayout
* @extends Ext.layout.ContainerLayout
* <p>This is the layout style of choice for creating structural layouts in a multi-column format where the width of
* each column can be specified as a percentage or fixed width, but the height is allowed to vary based on the content.
* This class is intended to be extended or created via the layout:'column' {@link Ext.Container#layout} config,
* and should generally not need to be created directly via the new keyword.</p>
* <p>ColumnLayout does not have any direct config options (other than inherited ones), but it does support a
* specific config property of <b><tt>columnWidth</tt></b> that can be included in the config of any panel added to it. The
* layout will use the columnWidth (if present) or width of each panel during layout to determine how to size each panel.
* If width or columnWidth is not specified for a given panel, its width will default to the panel's width (or auto).</p>
* <p>The width property is always evaluated as pixels, and must be a number greater than or equal to 1.
* The columnWidth property is always evaluated as a percentage, and must be a decimal value greater than 0 and
* less than 1 (e.g., .25).</p>
* <p>The basic rules for specifying column widths are pretty simple. The logic makes two passes through the
* set of contained panels. During the first layout pass, all panels that either have a fixed width or none
* specified (auto) are skipped, but their widths are subtracted from the overall container width. During the second
* pass, all panels with columnWidths are assigned pixel widths in proportion to their percentages based on
* the total <b>remaining</b> container width. In other words, percentage width panels are designed to fill the space
* left over by all the fixed-width and/or auto-width panels. Because of this, while you can specify any number of columns
* with different percentages, the columnWidths must always add up to 1 (or 100%) when added together, otherwise your
* layout may not render as expected. Example usage:</p>
* <pre><code>
// All columns are percentages -- they must add up to 1
var p = new Ext.Panel({
title: 'Column Layout - Percentage Only',
layout:'column',
items: [{
title: 'Column 1',
columnWidth: .25
},{
title: 'Column 2',
columnWidth: .6
},{
title: 'Column 3',
columnWidth: .15
}]
});
// Mix of width and columnWidth -- all columnWidth values must add up
// to 1. The first column will take up exactly 120px, and the last two
// columns will fill the remaining container width.
var p = new Ext.Panel({
title: 'Column Layout - Mixed',
layout:'column',
items: [{
title: 'Column 1',
width: 120
},{
title: 'Column 2',
columnWidth: .8
},{
title: 'Column 3',
columnWidth: .2
}]
});
</code></pre>
*/
Ext.layout.ColumnLayout = Ext.extend(Ext.layout.ContainerLayout, {
// private
monitorResize:true,
type: 'column',
extraCls: 'x-column',
scrollOffset : 0,
// private
targetCls: 'x-column-layout-ct',
isValidParent : function(c, target){
return this.innerCt && c.getPositionEl().dom.parentNode == this.innerCt.dom;
},
getLayoutTargetSize : function() {
var target = this.container.getLayoutTarget(), ret;
if (target) {
ret = target.getViewSize();
// IE in strict mode will return a width of 0 on the 1st pass of getViewSize.
// Use getStyleSize to verify the 0 width, the adjustment pass will then work properly
// with getViewSize
if (Ext.isIE && Ext.isStrict && ret.width == 0){
ret = target.getStyleSize();
}
ret.width -= target.getPadding('lr');
ret.height -= target.getPadding('tb');
}
return ret;
},
renderAll : function(ct, target) {
if(!this.innerCt){
// the innerCt prevents wrapping and shuffling while
// the container is resizing
this.innerCt = target.createChild({cls:'x-column-inner'});
this.innerCt.createChild({cls:'x-clear'});
}
Ext.layout.ColumnLayout.superclass.renderAll.call(this, ct, this.innerCt);
},
// private
onLayout : function(ct, target){
var cs = ct.items.items,
len = cs.length,
c,
i,
m,
margins = [];
this.renderAll(ct, target);
var size = this.getLayoutTargetSize();
if(size.width < 1 && size.height < 1){ // display none?
return;
}
var w = size.width - this.scrollOffset,
h = size.height,
pw = w;
this.innerCt.setWidth(w);
// some columns can be percentages while others are fixed
// so we need to make 2 passes
for(i = 0; i < len; i++){
c = cs[i];
m = c.getPositionEl().getMargins('lr');
margins[i] = m;
if(!c.columnWidth){
pw -= (c.getWidth() + m);
}
}
pw = pw < 0 ? 0 : pw;
for(i = 0; i < len; i++){
c = cs[i];
m = margins[i];
if(c.columnWidth){
c.setSize(Math.floor(c.columnWidth * pw) - m);
}
}
// Browsers differ as to when they account for scrollbars. We need to re-measure to see if the scrollbar
// spaces were accounted for properly. If not, re-layout.
if (Ext.isIE) {
if (i = target.getStyle('overflow') && i != 'hidden' && !this.adjustmentPass) {
var ts = this.getLayoutTargetSize();
if (ts.width != size.width){
this.adjustmentPass = true;
this.onLayout(ct, target);
}
}
}
delete this.adjustmentPass;
}
<div id="prop-Ext.layout.ColumnLayout-activeItem"></div>/**
* @property activeItem
* @hide
*/
});
Ext.Container.LAYOUTS['column'] = Ext.layout.ColumnLayout;
</pre>
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