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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.1
- * Copyright(c) 2006-2010 Sencha Inc.
- * licensing@sencha.com
- * http://www.sencha.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>
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