+ //we set the innerCt size first because if our child items are larger than the previous innerCt size
+ //the browser will insert scrollbars and then remove them again immediately afterwards
+ this.innerCt.setSize(innerCtWidth || undefined, innerCtHeight || undefined);
+ },
+
+ /**
+ * @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,
+
+ //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, flexedHeight, horizMargins, 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 && Ext.isFunction(child.doLayout);
+
+
+ // Static height (numeric) requires no calcs
+ if (!Ext.isNumber(childHeight)) {
+
+ // 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;
+
+ nonFlexHeight += (childHeight || 0) + childMargins.top + childMargins.bottom;
+
+ // Max width for align - force layout of non-layed out subcontainers without a numeric width
+ if (!Ext.isNumber(childWidth)) {
+ if (canLayout) {
+ child.doLayout();
+ }
+ childWidth = child.getWidth();
+ }