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+ <title>The source code</title>
+ <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
+ <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
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+<body onload="prettyPrint();">
+ <pre class="prettyprint lang-js">/*!
+ * Ext JS Library 3.3.0
+ * Copyright(c) 2006-2010 Ext JS, Inc.
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+<div id="cls-Ext.layout.VBoxLayout"></div>/**
+ * @class Ext.layout.VBoxLayout
+ * @extends Ext.layout.BoxLayout
+ * <p>A layout that arranges items vertically down a Container. This layout optionally divides available vertical
+ * space between child items containing a numeric <code>flex</code> configuration.</p>
+ * This layout may also be used to set the widths of child items by configuring it with the {@link #align} option.
+ */
+Ext.layout.VBoxLayout = Ext.extend(Ext.layout.BoxLayout, {
+ <div id="cfg-Ext.layout.VBoxLayout-align"></div>/**
+ * @cfg {String} align
+ * Controls how the child items of the container are aligned. Acceptable configuration values for this
+ * property are:
+ * <div class="mdetail-params"><ul>
+ * <li><b><tt>left</tt></b> : <b>Default</b><div class="sub-desc">child items are aligned horizontally
+ * at the <b>left</b> side of the container</div></li>
+ * <li><b><tt>center</tt></b> : <div class="sub-desc">child items are aligned horizontally at the
+ * <b>mid-width</b> of the container</div></li>
+ * <li><b><tt>stretch</tt></b> : <div class="sub-desc">child items are stretched horizontally to fill
+ * the width of the container</div></li>
+ * <li><b><tt>stretchmax</tt></b> : <div class="sub-desc">child items are stretched horizontally to
+ * the size of the largest item.</div></li>
+ * </ul></div>
+ */
+ align : 'left', // left, center, stretch, strechmax
+ type: 'vbox',
+
+ <div id="cfg-Ext.layout.VBoxLayout-pack"></div>/**
+ * @cfg {String} pack
+ * Controls how the child items of the container are packed together. Acceptable configuration values
+ * for this property are:
+ * <div class="mdetail-params"><ul>
+ * <li><b><tt>start</tt></b> : <b>Default</b><div class="sub-desc">child items are packed together at
+ * <b>top</b> side of container</div></li>
+ * <li><b><tt>center</tt></b> : <div class="sub-desc">child items are packed together at
+ * <b>mid-height</b> of container</div></li>
+ * <li><b><tt>end</tt></b> : <div class="sub-desc">child items are packed together at <b>bottom</b>
+ * side of container</div></li>
+ * </ul></div>
+ */
+
+ <div id="cfg-Ext.layout.VBoxLayout-flex"></div>/**
+ * @cfg {Number} flex
+ * This configuation option is to be applied to <b>child <tt>items</tt></b> of the container managed
+ * by this layout. Each child item with a <tt>flex</tt> property will be flexed <b>vertically</b>
+ * according to each item's <b>relative</b> <tt>flex</tt> value compared to the sum of all items with
+ * a <tt>flex</tt> value specified. Any child items that have either a <tt>flex = 0</tt> or
+ * <tt>flex = undefined</tt> will not be 'flexed' (the initial size will not be changed).
+ */
+
+ /**
+ * @private
+ * Calculates the size and positioning of each item in the VBox. This iterates over all of the rendered,
+ * visible items and returns a height, width, top and left for each, as well as a reference to each. Also
+ * returns meta data such as maxHeight which are useful when resizing layout wrappers such as this.innerCt.
+ * @param {Array} visibleItems The array of all rendered, visible items to be calculated for
+ * @param {Object} targetSize Object containing target size and height
+ * @return {Object} Object containing box measurements for each child, plus meta data
+ */
+ calculateChildBoxes: function(visibleItems, targetSize) {
+ var visibleCount = visibleItems.length,
+
+ padding = this.padding,
+ topOffset = padding.top,
+ leftOffset = padding.left,
+ paddingVert = topOffset + padding.bottom,
+ paddingHoriz = leftOffset + padding.right,
+
+ width = targetSize.width - this.scrollOffset,
+ height = targetSize.height,
+ availWidth = Math.max(0, width - paddingHoriz),
+
+ isStart = this.pack == 'start',
+ isCenter = this.pack == 'center',
+ isEnd = this.pack == 'end',
+
+ nonFlexHeight= 0,
+ maxWidth = 0,
+ totalFlex = 0,
+ desiredHeight= 0,
+ minimumHeight= 0,
+
+ //used to cache the calculated size and position values for each child item
+ boxes = [],
+
+ //used in the for loops below, just declared here for brevity
+ child, childWidth, childHeight, childSize, childMargins, canLayout, i, calcs, flexedWidth,
+ horizMargins, vertMargins, stretchWidth;
+
+ //gather the total flex of all flexed items and the width taken up by fixed width items
+ for (i = 0; i < visibleCount; i++) {
+ child = visibleItems[i];
+ childHeight = child.height;
+ childWidth = child.width;
+ canLayout = !child.hasLayout && typeof child.doLayout == 'function';
+
+ // Static height (numeric) requires no calcs
+ if (typeof childHeight != 'number') {
+
+ // flex and not 'auto' height
+ if (child.flex && !childHeight) {
+ totalFlex += child.flex;
+
+ // Not flexed or 'auto' height or undefined height
+ } else {
+ //Render and layout sub-containers without a flex or width defined, as otherwise we
+ //don't know how wide the sub-container should be and cannot calculate flexed widths
+ if (!childHeight && canLayout) {
+ child.doLayout();
+ }
+
+ childSize = child.getSize();
+ childWidth = childSize.width;
+ childHeight = childSize.height;
+ }
+ }
+
+ childMargins = child.margins;
+ vertMargins = childMargins.top + childMargins.bottom;
+
+ nonFlexHeight += vertMargins + (childHeight || 0);
+ desiredHeight += vertMargins + (child.flex ? child.minHeight || 0 : childHeight);
+ minimumHeight += vertMargins + (child.minHeight || childHeight || 0);
+
+ // Max width for align - force layout of non-layed out subcontainers without a numeric width
+ if (typeof childWidth != 'number') {
+ if (canLayout) {
+ child.doLayout();
+ }
+ childWidth = child.getWidth();
+ }
+
+ maxWidth = Math.max(maxWidth, childWidth + childMargins.left + childMargins.right);
+
+ //cache the size of each child component
+ boxes.push({
+ component: child,
+ height : childHeight || undefined,
+ width : childWidth || undefined
+ });
+ }
+
+ var shortfall = desiredHeight - height,
+ tooNarrow = minimumHeight > height;
+
+ //the height available to the flexed items
+ var availableHeight = Math.max(0, (height - nonFlexHeight - paddingVert));
+
+ if (tooNarrow) {
+ for (i = 0, length = visibleCount; i < length; i++) {
+ boxes[i].height = visibleItems[i].minHeight || visibleItems[i].height || boxes[i].height;
+ }
+ } else {
+ //all flexed items should be sized to their minimum width, other items should be shrunk down until
+ //the shortfall has been accounted for
+ if (shortfall > 0) {
+ var minHeights = [];
+
+ <div id="prop-Ext.layout.VBoxLayout-for"></div>/**
+ * When we have a shortfall but are not tooNarrow, we need to shrink the height of each non-flexed item.
+ * Flexed items are immediately reduced to their minHeight and anything already at minHeight is ignored.
+ * The remaining items are collected into the minHeights array, which is later used to distribute the shortfall.
+ */
+ for (var index = 0, length = visibleCount; index < length; index++) {
+ var item = visibleItems[index],
+ minHeight = item.minHeight || 0;
+
+ //shrink each non-flex tab by an equal amount to make them all fit. Flexed items are all
+ //shrunk to their minHeight because they're flexible and should be the first to lose height
+ if (item.flex) {
+ boxes[index].height = minHeight;
+ } else {
+ minHeights.push({
+ minHeight: minHeight,
+ available: boxes[index].height - minHeight,
+ index : index
+ });
+ }
+ }
+
+ //sort by descending minHeight value
+ minHeights.sort(function(a, b) {
+ return a.available > b.available ? 1 : -1;
+ });
+
+ /*
+ * Distribute the shortfall (difference between total desired with of all items and actual height available)
+ * between the non-flexed items. We try to distribute the shortfall evenly, but apply it to items with the
+ * smallest difference between their height and minHeight first, so that if reducing the height by the average
+ * amount would make that item less than its minHeight, we carry the remainder over to the next item.
+ */
+ for (var i = 0, length = minHeights.length; i < length; i++) {
+ var itemIndex = minHeights[i].index;
+
+ if (itemIndex == undefined) {
+ continue;
+ }
+
+ var item = visibleItems[itemIndex],
+ box = boxes[itemIndex],
+ oldHeight = box.height,
+ minHeight = item.minHeight,
+ newHeight = Math.max(minHeight, oldHeight - Math.ceil(shortfall / (length - i))),
+ reduction = oldHeight - newHeight;
+
+ boxes[itemIndex].height = newHeight;
+ shortfall -= reduction;
+ }
+ } else {
+ //temporary variables used in the flex height calculations below
+ var remainingHeight = availableHeight,
+ remainingFlex = totalFlex;
+
+ //calculate the height of each flexed item
+ for (i = 0; i < visibleCount; i++) {
+ child = visibleItems[i];
+ calcs = boxes[i];
+
+ childMargins = child.margins;
+ horizMargins = childMargins.left + childMargins.right;
+
+ if (isStart && child.flex && !child.height) {
+ flexedHeight = Math.ceil((child.flex / remainingFlex) * remainingHeight);
+ remainingHeight -= flexedHeight;
+ remainingFlex -= child.flex;
+
+ calcs.height = flexedHeight;
+ calcs.dirtySize = true;
+ }
+ }
+ }
+ }
+
+ if (isCenter) {
+ topOffset += availableHeight / 2;
+ } else if (isEnd) {
+ topOffset += availableHeight;
+ }
+
+ //finally, calculate the left and top position of each item
+ for (i = 0; i < visibleCount; i++) {
+ child = visibleItems[i];
+ calcs = boxes[i];
+
+ childMargins = child.margins;
+ topOffset += childMargins.top;
+ horizMargins = childMargins.left + childMargins.right;
+
+
+ calcs.left = leftOffset + childMargins.left;
+ calcs.top = topOffset;
+
+ switch (this.align) {
+ case 'stretch':
+ stretchWidth = availWidth - horizMargins;
+ calcs.width = stretchWidth.constrain(child.minWidth || 0, child.maxWidth || 1000000);
+ calcs.dirtySize = true;
+ break;
+ case 'stretchmax':
+ stretchWidth = maxWidth - horizMargins;
+ calcs.width = stretchWidth.constrain(child.minWidth || 0, child.maxWidth || 1000000);
+ calcs.dirtySize = true;
+ break;
+ case 'center':
+ var diff = availWidth - calcs.width - horizMargins;
+ if (diff > 0) {
+ calcs.left = leftOffset + horizMargins + (diff / 2);
+ }
+ }
+
+ topOffset += calcs.height + childMargins.bottom;
+ }
+
+ return {
+ boxes: boxes,
+ meta : {
+ maxWidth : maxWidth,
+ nonFlexHeight: nonFlexHeight,
+ desiredHeight: desiredHeight,
+ minimumHeight: minimumHeight,
+ shortfall : desiredHeight - height,
+ tooNarrow : tooNarrow
+ }
+ };
+ }
+});
+
+Ext.Container.LAYOUTS.vbox = Ext.layout.VBoxLayout;
+</pre>
+</body>
+</html>
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