/**
+ * @class Ext.layout.container.Anchor
+ * @extends Ext.layout.container.Container
+ *
+ * This is a layout that enables anchoring of contained elements relative to the container's dimensions.
+ * If the container is resized, all anchored items are automatically rerendered according to their
+ * <b><tt>{@link #anchor}</tt></b> rules.
+ *
+ * This class is intended to be extended or created via the layout: 'anchor' {@link Ext.layout.container.AbstractContainer#layout}
+ * config, and should generally not need to be created directly via the new keyword.</p>
+ *
+ * AnchorLayout does not have any direct config options (other than inherited ones). By default,
+ * AnchorLayout will calculate anchor measurements based on the size of the container itself. However, the
+ * container using the AnchorLayout can supply an anchoring-specific config property of <b>anchorSize</b>.
+ * If anchorSize is specifed, the layout will use it as a virtual container for the purposes of calculating
+ * anchor measurements based on it instead, allowing the container to be sized independently of the anchoring
+ * logic if necessary.
+ *
+ * {@img Ext.layout.container.Anchor/Ext.layout.container.Anchor.png Ext.layout.container.Anchor container layout}
+ *
+ * For example:
+ * Ext.create('Ext.Panel', {
+ * width: 500,
+ * height: 400,
+ * title: "AnchorLayout Panel",
+ * layout: 'anchor',
+ * renderTo: Ext.getBody(),
+ * items: [{
+ * xtype: 'panel',
+ * title: '75% Width and 20% Height',
+ * anchor: '75% 20%'
+ * },{
+ * xtype: 'panel',
+ * title: 'Offset -300 Width & -200 Height',
+ * anchor: '-300 -200'
+ * },{
+ * xtype: 'panel',
+ * title: 'Mixed Offset and Percent',
+ * anchor: '-250 20%'
+ * }]
+ * });
+ */
+
+Ext.define('Ext.layout.container.Anchor', {
+
+ /* Begin Definitions */
+
+ alias: 'layout.anchor',
+ extend: 'Ext.layout.container.Container',
+ alternateClassName: 'Ext.layout.AnchorLayout',
+
+ /* End Definitions */
+
+ /**
+ * @cfg {String} anchor
+ * <p>This configuation option is to be applied to <b>child <tt>items</tt></b> of a container managed by
+ * this layout (ie. configured with <tt>layout:'anchor'</tt>).</p><br/>
+ *
+ * <p>This value is what tells the layout how an item should be anchored to the container. <tt>items</tt>
+ * added to an AnchorLayout accept an anchoring-specific config property of <b>anchor</b> which is a string
+ * containing two values: the horizontal anchor value and the vertical anchor value (for example, '100% 50%').
+ * The following types of anchor values are supported:<div class="mdetail-params"><ul>
+ *
+ * <li><b>Percentage</b> : Any value between 1 and 100, expressed as a percentage.<div class="sub-desc">
+ * The first anchor is the percentage width that the item should take up within the container, and the
+ * second is the percentage height. For example:<pre><code>
+// two values specified
+anchor: '100% 50%' // render item complete width of the container and
+ // 1/2 height of the container
+// one value specified
+anchor: '100%' // the width value; the height will default to auto
+ * </code></pre></div></li>
+ *
+ * <li><b>Offsets</b> : Any positive or negative integer value.<div class="sub-desc">
+ * This is a raw adjustment where the first anchor is the offset from the right edge of the container,
+ * and the second is the offset from the bottom edge. For example:<pre><code>
+// two values specified
+anchor: '-50 -100' // render item the complete width of the container
+ // minus 50 pixels and
+ // the complete height minus 100 pixels.
+// one value specified
+anchor: '-50' // anchor value is assumed to be the right offset value
+ // bottom offset will default to 0
+ * </code></pre></div></li>
+ *
+ * <li><b>Sides</b> : Valid values are <tt>'right'</tt> (or <tt>'r'</tt>) and <tt>'bottom'</tt>
+ * (or <tt>'b'</tt>).<div class="sub-desc">
+ * Either the container must have a fixed size or an anchorSize config value defined at render time in
+ * order for these to have any effect.</div></li>
+ *
+ * <li><b>Mixed</b> : <div class="sub-desc">
+ * Anchor values can also be mixed as needed. For example, to render the width offset from the container
+ * right edge by 50 pixels and 75% of the container's height use:
+ * <pre><code>
+anchor: '-50 75%'
+ * </code></pre></div></li>
+ *
+ *
+ * </ul></div>
+ */
+
+ type: 'anchor',
+
+ /**
+ * @cfg {String} defaultAnchor
+ *
+ * default anchor for all child container items applied if no anchor or specific width is set on the child item. Defaults to '100%'.
+ *
+ */
+ defaultAnchor: '100%',
+
+ parseAnchorRE: /^(r|right|b|bottom)$/i,
+
+ // private
+ onLayout: function() {
+ this.callParent(arguments);
+
+ var me = this,
+ size = me.getLayoutTargetSize(),
+ owner = me.owner,
+ target = me.getTarget(),
+ ownerWidth = size.width,
+ ownerHeight = size.height,
+ overflow = target.getStyle('overflow'),
+ components = me.getVisibleItems(owner),
+ len = components.length,
+ boxes = [],
+ box, newTargetSize, anchorWidth, anchorHeight, component, anchorSpec, calcWidth, calcHeight,
+ anchorsArray, anchor, i, el;
+
+ if (ownerWidth < 20 && ownerHeight < 20) {
+ return;
+ }
+
+ // Anchor layout uses natural HTML flow to arrange the child items.
+ // To ensure that all browsers (I'm looking at you IE!) add the bottom margin of the last child to the
+ // containing element height, we create a zero-sized element with style clear:both to force a "new line"
+ if (!me.clearEl) {
+ me.clearEl = target.createChild({
+ cls: Ext.baseCSSPrefix + 'clear',
+ role: 'presentation'
+ });
+ }
+
+ // find the container anchoring size
+ if (owner.anchorSize) {
+ if (typeof owner.anchorSize == 'number') {
+ anchorWidth = owner.anchorSize;
+ }
+ else {
+ anchorWidth = owner.anchorSize.width;
+ anchorHeight = owner.anchorSize.height;
+ }
+ }
+ else {
+ anchorWidth = owner.initialConfig.width;
+ anchorHeight = owner.initialConfig.height;
+ }
+
+ // Work around WebKit RightMargin bug. We're going to inline-block all the children only ONCE and remove it when we're done
+ if (!Ext.supports.RightMargin) {
+ target.addCls(Ext.baseCSSPrefix + 'inline-children');
+ }
+
+ for (i = 0; i < len; i++) {
+ component = components[i];
+ el = component.el;
+ anchor = component.anchor;
+
+ if (!component.anchor && component.items && !Ext.isNumber(component.width) && !(Ext.isIE6 && Ext.isStrict)) {
+ component.anchor = anchor = me.defaultAnchor;
+ }
+
+ if (anchor) {
+ anchorSpec = component.anchorSpec;
+ // cache all anchor values
+ if (!anchorSpec) {
+ anchorsArray = anchor.split(' ');
+ component.anchorSpec = anchorSpec = {
+ right: me.parseAnchor(anchorsArray[0], component.initialConfig.width, anchorWidth),
+ bottom: me.parseAnchor(anchorsArray[1], component.initialConfig.height, anchorHeight)
+ };
+ }
+ calcWidth = anchorSpec.right ? me.adjustWidthAnchor(anchorSpec.right(ownerWidth) - el.getMargin('lr'), component) : undefined;
+ calcHeight = anchorSpec.bottom ? me.adjustHeightAnchor(anchorSpec.bottom(ownerHeight) - el.getMargin('tb'), component) : undefined;
+
+ boxes.push({
+ component: component,
+ anchor: true,
+ width: calcWidth || undefined,
+ height: calcHeight || undefined
+ });
+ } else {
+ boxes.push({
+ component: component,
+ anchor: false
+ });
+ }
+ }
+
+ // Work around WebKit RightMargin bug. We're going to inline-block all the children only ONCE and remove it when we're done
+ if (!Ext.supports.RightMargin) {
+ target.removeCls(Ext.baseCSSPrefix + 'inline-children');
+ }
+
+ for (i = 0; i < len; i++) {
+ box = boxes[i];
+ me.setItemSize(box.component, box.width, box.height);
+ }
+
+ if (overflow && overflow != 'hidden' && !me.adjustmentPass) {
+ newTargetSize = me.getLayoutTargetSize();
+ if (newTargetSize.width != size.width || newTargetSize.height != size.height) {
+ me.adjustmentPass = true;
+ me.onLayout();
+ }
+ }
+
+ delete me.adjustmentPass;
+ },
+
+ // private
+ parseAnchor: function(a, start, cstart) {
+ if (a && a != 'none') {
+ var ratio;
+ // standard anchor
+ if (this.parseAnchorRE.test(a)) {
+ var diff = cstart - start;
+ return function(v) {
+ return v - diff;
+ };
+ }
+ // percentage
+ else if (a.indexOf('%') != -1) {
+ ratio = parseFloat(a.replace('%', '')) * 0.01;
+ return function(v) {
+ return Math.floor(v * ratio);
+ };
+ }
+ // simple offset adjustment
+ else {
+ a = parseInt(a, 10);
+ if (!isNaN(a)) {
+ return function(v) {
+ return v + a;
+ };
+ }
+ }
+ }
+ return null;
+ },
+
+ // private
+ adjustWidthAnchor: function(value, comp) {
+ return value;
+ },
+
+ // private
+ adjustHeightAnchor: function(value, comp) {
+ return value;
+ }
+
+});