Draw a line from one item point to another
To draw a line mousedown on an item and drag to another and mouseup to draw the line permanently.
Created
April 2, 2012 08:27
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Draw a line from one item point to another
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| Ext.setup({ | |
| onReady: function() { | |
| var data = []; | |
| for (var i = 0; i < 10; i++) { | |
| data.push({ | |
| x: i, | |
| y: parseInt(Math.random() * 100, 10) | |
| }); | |
| } | |
| var startPoint = null; | |
| var draw = false; | |
| var line = null; | |
| var chart = new Ext.chart.Chart({ | |
| store: new Ext.data.JsonStore({ | |
| fields: ['x', 'y'], | |
| data: data | |
| }), | |
| axes: [{ | |
| type: 'Numeric', | |
| position: 'left', | |
| fields: ['y'] | |
| }, { | |
| type: 'Category', | |
| position: 'bottom', | |
| fields: ['x'] | |
| }], | |
| series: [{ | |
| type: 'line', | |
| axis: 'left', | |
| xField: 'x', | |
| yField: 'y', | |
| showMarkers: false, | |
| listeners: { | |
| 'itemmousedown': function(serie, item, event) { | |
| line = new Ext.draw.Sprite({ | |
| type: 'path', | |
| path: [ | |
| ['M', event.pageX, event.browserEvent.offsetY] | |
| ], | |
| stroke: 'red', | |
| 'stroke-width': 2 | |
| }); | |
| startPoint = item.point; | |
| draw = true; | |
| }, | |
| 'itemmouseup': function(serie, item, event) { | |
| if (line.attr.path.length > 1) { | |
| serie.surface.add({ | |
| type: 'path', | |
| path: [ | |
| ['M', startPoint[0], startPoint[1]], | |
| ['L', item.point[0], item.point[1]] | |
| ], | |
| stroke: 'red', | |
| 'stroke-width': 2 | |
| }); | |
| serie.surface.renderFrame(); | |
| chart.surfaces.events.remove(line); | |
| chart.surfaces.events.renderFrame(); | |
| } | |
| draw = false; | |
| } | |
| } | |
| }] | |
| }); | |
| chart.on('redraw', function() { | |
| var surface = chart.surfaces.events; | |
| surface.on('mousemove', function(event) { | |
| if (draw == true) { | |
| if (line.attr.path.length == 1) { | |
| line.attr.path.push(['L', event.pageX, event.browserEvent.offsetY]); | |
| } | |
| else { | |
| line.attr.path[1] = ['L', event.pageX, event.browserEvent.offsetY]; | |
| } | |
| chart.surfaces.events.add(line); | |
| chart.surfaces.events.renderFrame(); | |
| } | |
| }); | |
| surface.on('mouseup', function(event) { | |
| if (line.attr.path.length > 1) { | |
| chart.surfaces.events.remove(line); | |
| chart.surfaces.events.renderFrame(); | |
| draw = false; | |
| } | |
| }); | |
| }); | |
| var panel = new Ext.chart.Panel({ | |
| fullscreen: true, | |
| chart: chart | |
| }); | |
| } | |
| }); |
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| <!DOCTYPE HTML> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title></title> | |
| <link rel="stylesheet" type="text/css" href="http://testfactory.fr/chart/sencha-touch.css" media="all"> | |
| <link rel="stylesheet" type="text/css" href="http://testfactory.fr/chart/touch-charts-full.css" media="all"> | |
| <script type="text/javascript" src="http://testfactory.fr/chart/sencha-touch-debug.js"></script> | |
| <script type="text/javascript" src="http://testfactory.fr/chart/touch-charts-debug.js"></script> | |
| <script type="text/javascript" src="app.js"></script> | |
| </head> | |
| <body> | |
| </body> | |
| </html> |
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