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+ <pre class="prettyprint lang-js"><span id='Ext-grid-ColumnLayout'>/**
+</span> * @class Ext.grid.ColumnLayout
+ * @extends Ext.layout.container.HBox
+ * @private
+ *
+ * <p>This class is used only by the grid's HeaderContainer docked child.</p>
+ *
+ * <p>This class adds the ability to shrink the vertical size of the inner container element back if a grouped
+ * column header has all its child columns dragged out, and the whole HeaderContainer needs to shrink back down.</p>
+ *
+ * <p>It also enforces the grid's HeaderContainer's forceFit config by, after every calaculateChildBoxes call, converting
+ * all pixel widths into flex values, so that propertions are maintained upon width change of the grid.</p>
+ *
+ * <p>Also, after every layout, after all headers have attained their 'stretchmax' height, it goes through and calls
+ * <code>setPadding</code> on the columns so that they lay out correctly. TODO: implement a ColumnHeader component
+ * layout which takes responsibility for this, and will run upon resize.</p>
+ */
+Ext.define('Ext.grid.ColumnLayout', {
+ extend: 'Ext.layout.container.HBox',
+ alias: 'layout.gridcolumn',
+ type : 'column',
+
+ // Height-stretched innerCt must be able to revert back to unstretched height
+ clearInnerCtOnLayout: false,
+
+ constructor: function() {
+ var me = this;
+ me.callParent(arguments);
+ if (!Ext.isDefined(me.availableSpaceOffset)) {
+ me.availableSpaceOffset = (Ext.getScrollBarWidth() - 2);
+ }
+ },
+
+ beforeLayout: function() {
+ var me = this,
+ i = 0,
+ items = me.getLayoutItems(),
+ len = items.length,
+ item, returnValue;
+
+ returnValue = me.callParent(arguments);
+
+ // Size to a sane minimum height before possibly being stretched to accommodate grouped headers
+ me.innerCt.setHeight(23);
+
+ // Unstretch child items before the layout which stretches them.
+ if (me.align == 'stretchmax') {
+ for (; i < len; i++) {
+ item = items[i];
+ item.el.setStyle({
+ height: 'auto'
+ });
+ item.titleContainer.setStyle({
+ height: 'auto',
+ paddingTop: '0'
+ });
+ if (item.componentLayout && item.componentLayout.lastComponentSize) {
+ item.componentLayout.lastComponentSize.height = item.el.dom.offsetHeight;
+ }
+ }
+ }
+ return returnValue;
+ },
+
+ // Override to enforce the forceFit config.
+ calculateChildBoxes: function(visibleItems, targetSize) {
+ var me = this,
+ calculations = me.callParent(arguments),
+ boxes = calculations.boxes,
+ metaData = calculations.meta,
+ len = boxes.length, i = 0, box, item;
+
+ if (targetSize.width && !me.isColumn) {
+ // If configured forceFit then all columns will be flexed
+ if (me.owner.forceFit) {
+
+ for (; i < len; i++) {
+ box = boxes[i];
+ item = box.component;
+
+ // Set a sane minWidth for the Box layout to be able to squeeze flexed Headers down to.
+ item.minWidth = Ext.grid.plugin.HeaderResizer.prototype.minColWidth;
+
+ // For forceFit, just use allocated width as the flex value, and the proportions
+ // will end up the same whatever HeaderContainer width they are being forced into.
+ item.flex = box.width;
+ }
+
+ // Recalculate based upon all columns now being flexed instead of sized.
+ calculations = me.callParent(arguments);
+ }
+ else if (metaData.tooNarrow) {
+ targetSize.width = metaData.desiredSize;
+ }
+ }
+
+ return calculations;
+ },
+
+ afterLayout: function() {
+ var me = this,
+ i = 0,
+ items = me.getLayoutItems(),
+ len = items.length;
+
+ me.callParent(arguments);
+
+ // Set up padding in items
+ if (me.align == 'stretchmax') {
+ for (; i < len; i++) {
+ items[i].setPadding();
+ }
+ }
+ },
+
+ // FIX: when flexing we actually don't have enough space as we would
+ // typically because of the scrollOffset on the GridView, must reserve this
+ updateInnerCtSize: function(tSize, calcs) {
+ var me = this,
+ extra = 0;
+
+ // Columns must not account for scroll offset
+ if (!me.isColumn && calcs.meta.tooNarrow) {
+ if (
+ Ext.isWebKit ||
+ Ext.isGecko ||
+ (Ext.isIEQuirks && (Ext.isIE6 || Ext.isIE7 || Ext.isIE8))
+ ) {
+ extra = 1;
+ // IE6-8 not quirks
+ } else if (Ext.isIE6 || Ext.isIE7 || Ext.isIE8) {
+ extra = 2;
+ }
+
+ // this is the 1px accounted for in the Scroller when subtracting 1px.
+ extra++;
+ tSize.width = calcs.meta.desiredSize + (me.reserveOffset ? me.availableSpaceOffset : 0) + extra;
+ }
+ return me.callParent(arguments);
+ },
+
+ doOwnerCtLayouts: function() {
+ var ownerCt = this.owner.ownerCt;
+ if (!ownerCt.componentLayout.layoutBusy) {
+ ownerCt.doComponentLayout();
+ }
+ }
+});</pre>
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