/ext-4.1.0_b3/docs/source/Navigation.html
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- <title>The source code</title>
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- <pre class="prettyprint lang-js"><span id='Ext-chart-Navigation'>/**
- </span> * @class Ext.chart.Navigation
- *
- * Handles panning and zooming capabilities.
- *
- * Used as mixin by Ext.chart.Chart.
- */
- Ext.define('Ext.chart.Navigation', {
- constructor: function() {
- this.originalStore = this.store;
- },
- <span id='Ext-chart-Navigation-method-setZoom'> /**
- </span> * Zooms the chart to the specified selection range.
- * Can be used with a selection mask. For example:
- *
- * items: {
- * xtype: 'chart',
- * animate: true,
- * store: store1,
- * mask: 'horizontal',
- * listeners: {
- * select: {
- * fn: function(me, selection) {
- * me.setZoom(selection);
- * me.mask.hide();
- * }
- * }
- * }
- * }
- */
- setZoom: function(zoomConfig) {
- var me = this,
- axes = me.axes,
- axesItems = axes.items,
- i, ln, axis,
- bbox = me.chartBBox,
- xScale = 1 / bbox.width,
- yScale = 1 / bbox.height,
- zoomer = {
- x : zoomConfig.x * xScale,
- y : zoomConfig.y * yScale,
- width : zoomConfig.width * xScale,
- height : zoomConfig.height * yScale
- };
- for (i = 0, ln = axesItems.length; i < ln; i++) {
- axis = axesItems[i];
- var ends = axis.calcEnds();
- if (axis.position == 'bottom' || axis.position == 'top') {
- var from = (ends.to - ends.from) * zoomer.x + ends.from,
- to = (ends.to - ends.from) * zoomer.width + from;
- axis.minimum = from;
- axis.maximum = to;
- } else {
- var to = (ends.to - ends.from) * (1 - zoomer.y) + ends.from,
- from = to - (ends.to - ends.from) * zoomer.height;
- axis.minimum = from;
- axis.maximum = to;
- }
- }
- me.redraw(false);
- },
- <span id='Ext-chart-Navigation-method-restoreZoom'> /**
- </span> * Restores the zoom to the original value. This can be used to reset
- * the previous zoom state set by `setZoom`. For example:
- *
- * myChart.restoreZoom();
- */
- restoreZoom: function() {
- if (this.originalStore) {
- this.store = this.substore = this.originalStore;
- this.redraw(true);
- }
- }
- });
- </pre>
- </body>
- </html>