X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6..7a654f8d43fdb43d78b63d90528bed6e86b608cc:/src/layout/container/Anchor.js

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+/**
+ * @class Ext.layout.container.Anchor
+ * @extends Ext.layout.container.Container
+ * <p>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.</p>
+ * <p>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>
+ * <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;
+    }
+
+});
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