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<pre class="prettyprint lang-js"><span id='Ext-chart-Label'>/**
</span> * @class Ext.chart.Label
*
- * Labels is a mixin whose methods are appended onto the Series class. Labels is an interface with methods implemented
- * in each of the Series (Pie, Bar, etc) for label creation and label placement.
+ * Labels is a mixin to the Series class. Labels methods are implemented
+ * in each of the Series (Pie, Bar, etc) for label creation and placement.
*
* The methods implemented by the Series are:
- *
+ *
* - **`onCreateLabel(storeItem, item, i, display)`** Called each time a new label is created.
* The arguments of the method are:
* - *`storeItem`* The element of the store that is related to the label sprite.
/* Begin Definitions */
requires: ['Ext.draw.Color'],
-
- /* End Definitions */
-
-<span id='Ext-chart-Label-cfg-display'> /**
-</span> * @cfg {String} display
- * Specifies the presence and position of labels for each pie slice. Either "rotate", "middle", "insideStart",
- * "insideEnd", "outside", "over", "under", or "none" to prevent label rendering.
- * Default value: 'none'.
- */
-
-<span id='Ext-chart-Label-cfg-color'> /**
-</span> * @cfg {String} color
- * The color of the label text.
- * Default value: '#000' (black).
- */
-
-<span id='Ext-chart-Label-cfg-field'> /**
-</span> * @cfg {String} field
- * The name of the field to be displayed in the label.
- * Default value: 'name'.
- */
-
-<span id='Ext-chart-Label-cfg-minMargin'> /**
-</span> * @cfg {Number} minMargin
- * Specifies the minimum distance from a label to the origin of the visualization.
- * This parameter is useful when using PieSeries width variable pie slice lengths.
- * Default value: 50.
- */
-
-<span id='Ext-chart-Label-cfg-font'> /**
-</span> * @cfg {String} font
- * The font used for the labels.
- * Defautl value: "11px Helvetica, sans-serif".
- */
-<span id='Ext-chart-Label-cfg-orientation'> /**
-</span> * @cfg {String} orientation
- * Either "horizontal" or "vertical".
- * Dafault value: "horizontal".
- */
+ /* End Definitions */
-<span id='Ext-chart-Label-cfg-renderer'> /**
-</span> * @cfg {Function} renderer
- * Optional function for formatting the label into a displayable value.
- * Default value: function(v) { return v; }
- * @param v
+<span id='Ext-chart-Label-cfg-label'> /**
+</span> * @cfg {Object} label
+ * Object with the following properties:
+ *
+ * - **display** : String
+ *
+ * Specifies the presence and position of labels for each pie slice. Either "rotate", "middle", "insideStart",
+ * "insideEnd", "outside", "over", "under", or "none" to prevent label rendering.
+ * Default value: 'none'.
+ *
+ * - **color** : String
+ *
+ * The color of the label text.
+ * Default value: '#000' (black).
+ *
+ * - **contrast** : Boolean
+ *
+ * True to render the label in contrasting color with the backround.
+ * Default value: false.
+ *
+ * - **field** : String
+ *
+ * The name of the field to be displayed in the label.
+ * Default value: 'name'.
+ *
+ * - **minMargin** : Number
+ *
+ * Specifies the minimum distance from a label to the origin of the visualization.
+ * This parameter is useful when using PieSeries width variable pie slice lengths.
+ * Default value: 50.
+ *
+ * - **font** : String
+ *
+ * The font used for the labels.
+ * Default value: "11px Helvetica, sans-serif".
+ *
+ * - **orientation** : String
+ *
+ * Either "horizontal" or "vertical".
+ * Dafault value: "horizontal".
+ *
+ * - **renderer** : Function
+ *
+ * Optional function for formatting the label into a displayable value.
+ * Default value: function(v) { return v; }
*/
//@private a regex to parse url type colors.
colorStringRe: /url\s*\(\s*#([^\/)]+)\s*\)/,
-
+
//@private the mixin constructor. Used internally by Series.
constructor: function(config) {
var me = this;
color = config.color,
field = [].concat(config.field),
group = me.labelsGroup,
+ groupLength = (group || 0) && group.length,
store = me.chart.store,
len = store.getCount(),
itemLength = (items || 0) && items.length,
ratio = itemLength / len,
gradientsCount = (gradients || 0) && gradients.length,
Color = Ext.draw.Color,
- gradient, i, count, index, j, k, colorStopTotal, colorStopIndex, colorStop, item, label,
+ hides = [],
+ gradient, i, count, groupIndex, index, j, k, colorStopTotal, colorStopIndex, colorStop, item, label,
storeItem, sprite, spriteColor, spriteBrightness, labelColor, colorString;
if (display == 'none') {
return;
}
+ // no items displayed, hide all labels
+ if(itemLength == 0){
+ while(groupLength--)
+ hides.push(groupLength);
+ }else{
+ for (i = 0, count = 0, groupIndex = 0; i < len; i++) {
+ index = 0;
+ for (j = 0; j < ratio; j++) {
+ item = items[count];
+ label = group.getAt(groupIndex);
+ storeItem = store.getAt(i);
+ //check the excludes
+ while(this.__excludes && this.__excludes[index] && ratio > 1) {
+ if(field[j]){
+ hides.push(groupIndex);
+ }
+ index++;
- for (i = 0, count = 0; i < len; i++) {
- index = 0;
- for (j = 0; j < ratio; j++) {
- item = items[count];
- label = group.getAt(count);
- storeItem = store.getAt(i);
-
- //check the excludes
- while(this.__excludes && this.__excludes[index]) {
- index++;
- }
-
- if (!item && label) {
- label.hide(true);
- }
+ }
- if (item && field[j]) {
- if (!label) {
- label = me.onCreateLabel(storeItem, item, i, display, j, index);
+ if (!item && label) {
+ label.hide(true);
+ groupIndex++;
}
- me.onPlaceLabel(label, storeItem, item, i, display, animate, j, index);
- //set contrast
- if (config.contrast && item.sprite) {
- sprite = item.sprite;
- //set the color string to the color to be set.
- if (sprite._endStyle) {
- colorString = sprite._endStyle.fill;
- }
- else if (sprite._to) {
- colorString = sprite._to.fill;
- }
- else {
- colorString = sprite.attr.fill;
+ if (item && field[j]) {
+ if (!label) {
+ label = me.onCreateLabel(storeItem, item, i, display, j, index);
}
- colorString = colorString || sprite.attr.fill;
-
- spriteColor = Color.fromString(colorString);
- //color wasn't parsed property maybe because it's a gradient id
- if (colorString && !spriteColor) {
- colorString = colorString.match(me.colorStringRe)[1];
- for (k = 0; k < gradientsCount; k++) {
- gradient = gradients[k];
- if (gradient.id == colorString) {
- //avg color stops
- colorStop = 0; colorStopTotal = 0;
- for (colorStopIndex in gradient.stops) {
- colorStop++;
- colorStopTotal += Color.fromString(gradient.stops[colorStopIndex].color).getGrayscale();
+ me.onPlaceLabel(label, storeItem, item, i, display, animate, j, index);
+ groupIndex++;
+
+ //set contrast
+ if (config.contrast && item.sprite) {
+ sprite = item.sprite;
+ //set the color string to the color to be set.
+ if (sprite._endStyle) {
+ colorString = sprite._endStyle.fill;
+ }
+ else if (sprite._to) {
+ colorString = sprite._to.fill;
+ }
+ else {
+ colorString = sprite.attr.fill;
+ }
+ colorString = colorString || sprite.attr.fill;
+
+ spriteColor = Color.fromString(colorString);
+ //color wasn't parsed property maybe because it's a gradient id
+ if (colorString && !spriteColor) {
+ colorString = colorString.match(me.colorStringRe)[1];
+ for (k = 0; k < gradientsCount; k++) {
+ gradient = gradients[k];
+ if (gradient.id == colorString) {
+ //avg color stops
+ colorStop = 0; colorStopTotal = 0;
+ for (colorStopIndex in gradient.stops) {
+ colorStop++;
+ colorStopTotal += Color.fromString(gradient.stops[colorStopIndex].color).getGrayscale();
+ }
+ spriteBrightness = (colorStopTotal / colorStop) / 255;
+ break;
}
- spriteBrightness = (colorStopTotal / colorStop) / 255;
- break;
}
}
+ else {
+ spriteBrightness = spriteColor.getGrayscale() / 255;
+ }
+ if (label.isOutside) {
+ spriteBrightness = 1;
+ }
+ labelColor = Color.fromString(label.attr.color || label.attr.fill).getHSL();
+ labelColor[2] = spriteBrightness > 0.5 ? 0.2 : 0.8;
+ label.setAttributes({
+ fill: String(Color.fromHSL.apply({}, labelColor))
+ }, true);
}
- else {
- spriteBrightness = spriteColor.getGrayscale() / 255;
- }
- if (label.isOutside) {
- spriteBrightness = 1;
- }
- labelColor = Color.fromString(label.attr.color || label.attr.fill).getHSL();
- labelColor[2] = spriteBrightness > 0.5 ? 0.2 : 0.8;
- label.setAttributes({
- fill: String(Color.fromHSL.apply({}, labelColor))
- }, true);
+
}
+ count++;
+ index++;
}
- count++;
- index++;
}
}
- me.hideLabels(count);
+ me.hideLabels(hides);
},
-
- //@private a method to hide labels.
- hideLabels: function(index) {
- var labelsGroup = this.labelsGroup, len;
- if (labelsGroup) {
- len = labelsGroup.getCount();
- while (len-->index) {
- labelsGroup.getAt(len).hide(true);
- }
- }
+ hideLabels: function(hides){
+ var labelsGroup = this.labelsGroup,
+ hlen = hides.length;
+ while(hlen--)
+ labelsGroup.getAt(hides[hlen]).hide(true);
}
});</pre>
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