X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6..7a654f8d43fdb43d78b63d90528bed6e86b608cc:/src/chart/axis/Gauge.js

diff --git a/src/chart/axis/Gauge.js b/src/chart/axis/Gauge.js
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+/**
+ * @class Ext.chart.axis.Gauge
+ * @extends Ext.chart.axis.Abstract
+ *
+ * Gauge Axis is the axis to be used with a Gauge series. The Gauge axis
+ * displays numeric data from an interval defined by the `minimum`, `maximum` and
+ * `step` configuration properties. The placement of the numeric data can be changed
+ * by altering the `margin` option that is set to `10` by default.
+ *
+ * A possible configuration for this axis would look like:
+ *
+            axes: [{
+                type: 'gauge',
+                position: 'gauge',
+                minimum: 0,
+                maximum: 100,
+                steps: 10,
+                margin: 7
+            }],
+ * 
+ */
+Ext.define('Ext.chart.axis.Gauge', {
+
+    /* Begin Definitions */
+
+    extend: 'Ext.chart.axis.Abstract',
+
+    /* End Definitions */
+    
+    /**
+     * @cfg {Number} minimum (required) the minimum value of the interval to be displayed in the axis.
+     */
+
+    /**
+     * @cfg {Number} maximum (required) the maximum value of the interval to be displayed in the axis.
+     */
+
+    /**
+     * @cfg {Number} steps (required) the number of steps and tick marks to add to the interval.
+     */
+
+    /**
+     * @cfg {Number} margin (optional) the offset positioning of the tick marks and labels in pixels. Default's 10.
+     */
+
+    position: 'gauge',
+
+    alias: 'axis.gauge',
+
+    drawAxis: function(init) {
+        var chart = this.chart,
+            surface = chart.surface,
+            bbox = chart.chartBBox,
+            centerX = bbox.x + (bbox.width / 2),
+            centerY = bbox.y + bbox.height,
+            margin = this.margin || 10,
+            rho = Math.min(bbox.width, 2 * bbox.height) /2 + margin,
+            sprites = [], sprite,
+            steps = this.steps,
+            i, pi = Math.PI,
+            cos = Math.cos,
+            sin = Math.sin;
+
+        if (this.sprites && !chart.resizing) {
+            this.drawLabel();
+            return;
+        }
+
+        if (this.margin >= 0) {
+            if (!this.sprites) {
+                //draw circles
+                for (i = 0; i <= steps; i++) {
+                    sprite = surface.add({
+                        type: 'path',
+                        path: ['M', centerX + (rho - margin) * cos(i / steps * pi - pi),
+                                    centerY + (rho - margin) * sin(i / steps * pi - pi),
+                                    'L', centerX + rho * cos(i / steps * pi - pi),
+                                    centerY + rho * sin(i / steps * pi - pi), 'Z'],
+                        stroke: '#ccc'
+                    });
+                    sprite.setAttributes({
+                        hidden: false
+                    }, true);
+                    sprites.push(sprite);
+                }
+            } else {
+                sprites = this.sprites;
+                //draw circles
+                for (i = 0; i <= steps; i++) {
+                    sprites[i].setAttributes({
+                        path: ['M', centerX + (rho - margin) * cos(i / steps * pi - pi),
+                                    centerY + (rho - margin) * sin(i / steps * pi - pi),
+                               'L', centerX + rho * cos(i / steps * pi - pi),
+                                    centerY + rho * sin(i / steps * pi - pi), 'Z'],
+                        stroke: '#ccc'
+                    }, true);
+                }
+            }
+        }
+        this.sprites = sprites;
+        this.drawLabel();
+        if (this.title) {
+            this.drawTitle();
+        }
+    },
+    
+    drawTitle: function() {
+        var me = this,
+            chart = me.chart,
+            surface = chart.surface,
+            bbox = chart.chartBBox,
+            labelSprite = me.titleSprite,
+            labelBBox;
+        
+        if (!labelSprite) {
+            me.titleSprite = labelSprite = surface.add({
+                type: 'text',
+                zIndex: 2
+            });    
+        }
+        labelSprite.setAttributes(Ext.apply({
+            text: me.title
+        }, me.label || {}), true);
+        labelBBox = labelSprite.getBBox();
+        labelSprite.setAttributes({
+            x: bbox.x + (bbox.width / 2) - (labelBBox.width / 2),
+            y: bbox.y + bbox.height - (labelBBox.height / 2) - 4
+        }, true);
+    },
+
+    /**
+     * Updates the {@link #title} of this axis.
+     * @param {String} title
+     */
+    setTitle: function(title) {
+        this.title = title;
+        this.drawTitle();
+    },
+
+    drawLabel: function() {
+        var chart = this.chart,
+            surface = chart.surface,
+            bbox = chart.chartBBox,
+            centerX = bbox.x + (bbox.width / 2),
+            centerY = bbox.y + bbox.height,
+            margin = this.margin || 10,
+            rho = Math.min(bbox.width, 2 * bbox.height) /2 + 2 * margin,
+            round = Math.round,
+            labelArray = [], label,
+            maxValue = this.maximum || 0,
+            steps = this.steps, i = 0,
+            adjY,
+            pi = Math.PI,
+            cos = Math.cos,
+            sin = Math.sin,
+            labelConf = this.label,
+            renderer = labelConf.renderer || function(v) { return v; };
+
+        if (!this.labelArray) {
+            //draw scale
+            for (i = 0; i <= steps; i++) {
+                // TODO Adjust for height of text / 2 instead
+                adjY = (i === 0 || i === steps) ? 7 : 0;
+                label = surface.add({
+                    type: 'text',
+                    text: renderer(round(i / steps * maxValue)),
+                    x: centerX + rho * cos(i / steps * pi - pi),
+                    y: centerY + rho * sin(i / steps * pi - pi) - adjY,
+                    'text-anchor': 'middle',
+                    'stroke-width': 0.2,
+                    zIndex: 10,
+                    stroke: '#333'
+                });
+                label.setAttributes({
+                    hidden: false
+                }, true);
+                labelArray.push(label);
+            }
+        }
+        else {
+            labelArray = this.labelArray;
+            //draw values
+            for (i = 0; i <= steps; i++) {
+                // TODO Adjust for height of text / 2 instead
+                adjY = (i === 0 || i === steps) ? 7 : 0;
+                labelArray[i].setAttributes({
+                    text: renderer(round(i / steps * maxValue)),
+                    x: centerX + rho * cos(i / steps * pi - pi),
+                    y: centerY + rho * sin(i / steps * pi - pi) - adjY
+                }, true);
+            }
+        }
+        this.labelArray = labelArray;
+    }
+});
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