X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/src/widgets/Shadow.js

diff --git a/src/widgets/Shadow.js b/src/widgets/Shadow.js
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+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**
+ * @class Ext.Shadow
+ * Simple class that can provide a shadow effect for any element.  Note that the element MUST be absolutely positioned,
+ * and the shadow does not provide any shimming.  This should be used only in simple cases -- for more advanced
+ * functionality that can also provide the same shadow effect, see the {@link Ext.Layer} class.
+ * @constructor
+ * Create a new Shadow
+ * @param {Object} config The config object
+ */
+Ext.Shadow = function(config){
+    Ext.apply(this, config);
+    if(typeof this.mode != "string"){
+        this.mode = this.defaultMode;
+    }
+    var o = this.offset, a = {h: 0};
+    var rad = Math.floor(this.offset/2);
+    switch(this.mode.toLowerCase()){ // all this hideous nonsense calculates the various offsets for shadows
+        case "drop":
+            a.w = 0;
+            a.l = a.t = o;
+            a.t -= 1;
+            if(Ext.isIE){
+                a.l -= this.offset + rad;
+                a.t -= this.offset + rad;
+                a.w -= rad;
+                a.h -= rad;
+                a.t += 1;
+            }
+        break;
+        case "sides":
+            a.w = (o*2);
+            a.l = -o;
+            a.t = o-1;
+            if(Ext.isIE){
+                a.l -= (this.offset - rad);
+                a.t -= this.offset + rad;
+                a.l += 1;
+                a.w -= (this.offset - rad)*2;
+                a.w -= rad + 1;
+                a.h -= 1;
+            }
+        break;
+        case "frame":
+            a.w = a.h = (o*2);
+            a.l = a.t = -o;
+            a.t += 1;
+            a.h -= 2;
+            if(Ext.isIE){
+                a.l -= (this.offset - rad);
+                a.t -= (this.offset - rad);
+                a.l += 1;
+                a.w -= (this.offset + rad + 1);
+                a.h -= (this.offset + rad);
+                a.h += 1;
+            }
+        break;
+    };
+
+    this.adjusts = a;
+};
+
+Ext.Shadow.prototype = {
+    /**
+     * @cfg {String} mode
+     * The shadow display mode.  Supports the following options:<div class="mdetail-params"><ul>
+     * <li><b><tt>sides</tt></b> : Shadow displays on both sides and bottom only</li>
+     * <li><b><tt>frame</tt></b> : Shadow displays equally on all four sides</li>
+     * <li><b><tt>drop</tt></b> : Traditional bottom-right drop shadow</li>
+     * </ul></div>
+     */
+    /**
+     * @cfg {String} offset
+     * The number of pixels to offset the shadow from the element (defaults to <tt>4</tt>)
+     */
+    offset: 4,
+
+    // private
+    defaultMode: "drop",
+
+    /**
+     * Displays the shadow under the target element
+     * @param {Mixed} targetEl The id or element under which the shadow should display
+     */
+    show : function(target){
+        target = Ext.get(target);
+        if(!this.el){
+            this.el = Ext.Shadow.Pool.pull();
+            if(this.el.dom.nextSibling != target.dom){
+                this.el.insertBefore(target);
+            }
+        }
+        this.el.setStyle("z-index", this.zIndex || parseInt(target.getStyle("z-index"), 10)-1);
+        if(Ext.isIE){
+            this.el.dom.style.filter="progid:DXImageTransform.Microsoft.alpha(opacity=50) progid:DXImageTransform.Microsoft.Blur(pixelradius="+(this.offset)+")";
+        }
+        this.realign(
+            target.getLeft(true),
+            target.getTop(true),
+            target.getWidth(),
+            target.getHeight()
+        );
+        this.el.dom.style.display = "block";
+    },
+
+    /**
+     * Returns true if the shadow is visible, else false
+     */
+    isVisible : function(){
+        return this.el ? true : false;  
+    },
+
+    /**
+     * Direct alignment when values are already available. Show must be called at least once before
+     * calling this method to ensure it is initialized.
+     * @param {Number} left The target element left position
+     * @param {Number} top The target element top position
+     * @param {Number} width The target element width
+     * @param {Number} height The target element height
+     */
+    realign : function(l, t, w, h){
+        if(!this.el){
+            return;
+        }
+        var a = this.adjusts, d = this.el.dom, s = d.style;
+        var iea = 0;
+        s.left = (l+a.l)+"px";
+        s.top = (t+a.t)+"px";
+        var sw = (w+a.w), sh = (h+a.h), sws = sw +"px", shs = sh + "px";
+        if(s.width != sws || s.height != shs){
+            s.width = sws;
+            s.height = shs;
+            if(!Ext.isIE){
+                var cn = d.childNodes;
+                var sww = Math.max(0, (sw-12))+"px";
+                cn[0].childNodes[1].style.width = sww;
+                cn[1].childNodes[1].style.width = sww;
+                cn[2].childNodes[1].style.width = sww;
+                cn[1].style.height = Math.max(0, (sh-12))+"px";
+            }
+        }
+    },
+
+    /**
+     * Hides this shadow
+     */
+    hide : function(){
+        if(this.el){
+            this.el.dom.style.display = "none";
+            Ext.Shadow.Pool.push(this.el);
+            delete this.el;
+        }
+    },
+
+    /**
+     * Adjust the z-index of this shadow
+     * @param {Number} zindex The new z-index
+     */
+    setZIndex : function(z){
+        this.zIndex = z;
+        if(this.el){
+            this.el.setStyle("z-index", z);
+        }
+    }
+};
+
+// Private utility class that manages the internal Shadow cache
+Ext.Shadow.Pool = function(){
+    var p = [];
+    var markup = Ext.isIE ?
+                 '<div class="x-ie-shadow"></div>' :
+                 '<div class="x-shadow"><div class="xst"><div class="xstl"></div><div class="xstc"></div><div class="xstr"></div></div><div class="xsc"><div class="xsml"></div><div class="xsmc"></div><div class="xsmr"></div></div><div class="xsb"><div class="xsbl"></div><div class="xsbc"></div><div class="xsbr"></div></div></div>';
+    return {
+        pull : function(){
+            var sh = p.shift();
+            if(!sh){
+                sh = Ext.get(Ext.DomHelper.insertHtml("beforeBegin", document.body.firstChild, markup));
+                sh.autoBoxAdjust = false;
+            }
+            return sh;
+        },
+
+        push : function(sh){
+            p.push(sh);
+        }
+    };
+}();
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