Upgrade to ExtJS 4.0.0 - Released 04/26/2011

[extjs.git] / docs / source / Callout.html
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+<!DOCTYPE html><html><head><title>Sencha Documentation Project</title><link rel="stylesheet" href="../reset.css" type="text/css"><link rel="stylesheet" href="../prettify.css" type="text/css"><link rel="stylesheet" href="../prettify_sa.css" type="text/css"><script type="text/javascript" src="../prettify.js"></script></head><body onload="prettyPrint()"><pre class="prettyprint"><pre><span id='Ext-chart.Callout'>/**
+</span> * @class Ext.chart.Callout
+ * @ignore
+ */
+Ext.define('Ext.chart.Callout', {
+
+    /* Begin Definitions */
+
+    /* End Definitions */
+
+    constructor: function(config) {
+        if (config.callouts) {
+            config.callouts.styles = Ext.applyIf(config.callouts.styles || {}, {
+                color: &quot;#000&quot;,
+                font: &quot;11px Helvetica, sans-serif&quot;
+            });
+            this.callouts = Ext.apply(this.callouts || {}, config.callouts);
+            this.calloutsArray = [];
+        }
+    },
+
+    renderCallouts: function() {
+        if (!this.callouts) {
+            return;
+        }
+
+        var me = this,
+            items = me.items,
+            animate = me.chart.animate,
+            config = me.callouts,
+            styles = config.styles,
+            group = me.calloutsArray,
+            store = me.chart.store,
+            len = store.getCount(),
+            ratio = items.length / len,
+            previouslyPlacedCallouts = [],
+            i,
+            count,
+            j,
+            p;
+            
+        for (i = 0, count = 0; i &lt; len; i++) {
+            for (j = 0; j &lt; ratio; j++) {
+                var item = items[count],
+                    label = group[count],
+                    storeItem = store.getAt(i),
+                    display;
+                
+                display = config.filter(storeItem);
+                
+                if (!display &amp;&amp; !label) {
+                    count++;
+                    continue;               
+                }
+                
+                if (!label) {
+                    group[count] = label = me.onCreateCallout(storeItem, item, i, display, j, count);
+                }
+                for (p in label) {
+                    if (label[p] &amp;&amp; label[p].setAttributes) {
+                        label[p].setAttributes(styles, true);
+                    }
+                }
+                if (!display) {
+                    for (p in label) {
+                        if (label[p]) {
+                            if (label[p].setAttributes) {
+                                label[p].setAttributes({
+                                    hidden: true
+                                }, true);
+                            } else if(label[p].setVisible) {
+                                label[p].setVisible(false);
+                            }
+                        }
+                    }
+                }
+                config.renderer(label, storeItem);
+                me.onPlaceCallout(label, storeItem, item, i, display, animate,
+                                  j, count, previouslyPlacedCallouts);
+                previouslyPlacedCallouts.push(label);
+                count++;
+            }
+        }
+        this.hideCallouts(count);
+    },
+
+    onCreateCallout: function(storeItem, item, i, display) {
+        var me = this,
+            group = me.calloutsGroup,
+            config = me.callouts,
+            styles = config.styles,
+            width = styles.width,
+            height = styles.height,
+            chart = me.chart,
+            surface = chart.surface,
+            calloutObj = {
+                //label: false,
+                //box: false,
+                lines: false
+            };
+
+        calloutObj.lines = surface.add(Ext.apply({},
+        {
+            type: 'path',
+            path: 'M0,0',
+            stroke: me.getLegendColor() || '#555'
+        },
+        styles));
+
+        if (config.items) {
+            calloutObj.panel = Ext.create('widget.panel', {
+                style: &quot;position: absolute;&quot;,    
+                width: width,
+                height: height,
+                items: config.items,
+                renderTo: chart.el
+            });
+        }
+
+        return calloutObj;
+    },
+
+    hideCallouts: function(index) {
+        var calloutsArray = this.calloutsArray,
+            len = calloutsArray.length,
+            co,
+            p;
+        while (len--&gt;index) {
+            co = calloutsArray[len];
+            for (p in co) {
+                if (co[p]) {
+                    co[p].hide(true);
+                }
+            }
+        }
+    }
+});
+</pre></pre></body></html>
+\ No newline at end of file