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+Sencha Documentation Project/**
+ * @class Ext.draw.Component
+ * @extends Ext.Component
+ *
+ * The Draw Component is a surface in which sprites can be rendered. The Draw Component
+ * manages and holds a `Surface` instance: an interface that has
+ * an SVG or VML implementation depending on the browser capabilities and where
+ * Sprites can be appended.
+ * {@img Ext.draw.Component/Ext.draw.Component.png Ext.draw.Component component}
+ * One way to create a draw component is:
+ *
+ * var drawComponent = Ext.create('Ext.draw.Component', {
+ * viewBox: false,
+ * items: [{
+ * type: 'circle',
+ * fill: '#79BB3F',
+ * radius: 100,
+ * x: 100,
+ * y: 100
+ * }]
+ * });
+ *
+ * Ext.create('Ext.Window', {
+ * width: 215,
+ * height: 235,
+ * layout: 'fit',
+ * items: [drawComponent]
+ * }).show();
+ *
+ * In this case we created a draw component and added a sprite to it.
+ * The *type* of the sprite is *circle* so if you run this code you'll see a yellow-ish
+ * circle in a Window. When setting `viewBox` to `false` we are responsible for setting the object's position and
+ * dimensions accordingly.
+ *
+ * You can also add sprites by using the surface's add method:
+ *
+ * drawComponent.surface.add({
+ * type: 'circle',
+ * fill: '#79BB3F',
+ * radius: 100,
+ * x: 100,
+ * y: 100
+ * });
+ *
+ * For more information on Sprites, the core elements added to a draw component's surface,
+ * refer to the Ext.draw.Sprite documentation.
+ */
+Ext.define('Ext.draw.Component', {
+
+ /* Begin Definitions */
+
+ alias: 'widget.draw',
+
+ extend: 'Ext.Component',
+
+ requires: [
+ 'Ext.draw.Surface',
+ 'Ext.layout.component.Draw'
+ ],
+
+ /* End Definitions */
+
+ /**
+ * @cfg {Array} enginePriority
+ * Defines the priority order for which Surface implementation to use. The first
+ * one supported by the current environment will be used.
+ */
+ enginePriority: ['Svg', 'Vml'],
+
+ baseCls: Ext.baseCSSPrefix + 'surface',
+
+ componentLayout: 'draw',
+
+ /**
+ * @cfg {Boolean} viewBox
+ * Turn on view box support which will scale and position items in the draw component to fit to the component while
+ * maintaining aspect ratio. Note that this scaling can override other sizing settings on yor items. Defaults to true.
+ */
+ viewBox: true,
+
+ /**
+ * @cfg {Boolean} autoSize
+ * Turn on autoSize support which will set the bounding div's size to the natural size of the contents. Defaults to false.
+ */
+ autoSize: false,
+
+ /**
+ * @cfg {Array} gradients (optional) Define a set of gradients that can be used as `fill` property in sprites.
+ * The gradients array is an array of objects with the following properties:
+ *
+ * <ul>
+ * <li><strong>id</strong> - string - The unique name of the gradient.</li>
+ * <li><strong>angle</strong> - number, optional - The angle of the gradient in degrees.</li>
+ * <li><strong>stops</strong> - object - An object with numbers as keys (from 0 to 100) and style objects
+ * as values</li>
+ * </ul>
+ *
+
+ For example:
+
+ <pre><code>
+ gradients: [{
+ id: 'gradientId',
+ angle: 45,
+ stops: {
+ 0: {
+ color: '#555'
+ },
+ 100: {
+ color: '#ddd'
+ }
+ }
+ }, {
+ id: 'gradientId2',
+ angle: 0,
+ stops: {
+ 0: {
+ color: '#590'
+ },
+ 20: {
+ color: '#599'
+ },
+ 100: {
+ color: '#ddd'
+ }
+ }
+ }]
+ </code></pre>
+
+ Then the sprites can use `gradientId` and `gradientId2` by setting the fill attributes to those ids, for example:
+
+ <pre><code>
+ sprite.setAttributes({
+ fill: 'url(#gradientId)'
+ }, true);
+ </code></pre>
+
+ */
+
+ initComponent: function() {
+ this.callParent(arguments);
+
+ this.addEvents(
+ 'mousedown',
+ 'mouseup',
+ 'mousemove',
+ 'mouseenter',
+ 'mouseleave',
+ 'click'
+ );
+ },
+
+ /**
+ * @private
+ *
+ * Create the Surface on initial render
+ */
+ onRender: function() {
+ var me = this,
+ viewBox = me.viewBox,
+ autoSize = me.autoSize,
+ bbox, items, width, height, x, y;
+ me.callParent(arguments);
+
+ me.createSurface();
+
+ items = me.surface.items;
+
+ if (viewBox || autoSize) {
+ bbox = items.getBBox();
+ width = bbox.width;
+ height = bbox.height;
+ x = bbox.x;
+ y = bbox.y;
+ if (me.viewBox) {
+ me.surface.setViewBox(x, y, width, height);
+ }
+ else {
+ // AutoSized
+ me.autoSizeSurface();
+ }
+ }
+ },
+
+ //@private
+ autoSizeSurface: function() {
+ var me = this,
+ items = me.surface.items,
+ bbox = items.getBBox(),
+ width = bbox.width,
+ height = bbox.height;
+ items.setAttributes({
+ translate: {
+ x: -bbox.x,
+ //Opera has a slight offset in the y axis.
+ y: -bbox.y + (+Ext.isOpera)
+ }
+ }, true);
+ if (me.rendered) {
+ me.setSize(width, height);
+ }
+ else {
+ me.surface.setSize(width, height);
+ }
+ me.el.setSize(width, height);
+ },
+
+ /**
+ * Create the Surface instance. Resolves the correct Surface implementation to
+ * instantiate based on the 'enginePriority' config. Once the Surface instance is
+ * created you can use the handle to that instance to add sprites. For example:
+ *
+ <pre><code>
+ drawComponent.surface.add(sprite);
+ </code></pre>
+ */
+ createSurface: function() {
+ var surface = Ext.draw.Surface.create(Ext.apply({}, {
+ width: this.width,
+ height: this.height,
+ renderTo: this.el
+ }, this.initialConfig));
+ this.surface = surface;
+
+ function refire(eventName) {
+ return function(e) {
+ this.fireEvent(eventName, e);
+ };
+ }
+
+ surface.on({
+ scope: this,
+ mouseup: refire('mouseup'),
+ mousedown: refire('mousedown'),
+ mousemove: refire('mousemove'),
+ mouseenter: refire('mouseenter'),
+ mouseleave: refire('mouseleave'),
+ click: refire('click')
+ });
+ },
+
+
+ /**
+ * @private
+ *
+ * Clean up the Surface instance on component destruction
+ */
+ onDestroy: function() {
+ var surface = this.surface;
+ if (surface) {
+ surface.destroy();
+ }
+ this.callParent(arguments);
+ }
+
+});
+
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