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225 lines
9.3 KiB
225 lines
9.3 KiB
/** |
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* jqPlot |
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* Pure JavaScript plotting plugin using jQuery |
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* |
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* Version: 1.0.8 |
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* Revision: 1250 |
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* |
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* Copyright (c) 2009-2013 Chris Leonello |
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* jqPlot is currently available for use in all personal or commercial projects |
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* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL |
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* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can |
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* choose the license that best suits your project and use it accordingly. |
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* |
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* Although not required, the author would appreciate an email letting him |
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* know of any substantial use of jqPlot. You can reach the author at: |
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* chris at jqplot dot com or see http://www.jqplot.com/info.php . |
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* |
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* If you are feeling kind and generous, consider supporting the project by |
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* making a donation at: http://www.jqplot.com/donate.php . |
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* |
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* sprintf functions contained in jqplot.sprintf.js by Ash Searle: |
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* |
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* version 2007.04.27 |
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* author Ash Searle |
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* http://hexmen.com/blog/2007/03/printf-sprintf/ |
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* http://hexmen.com/js/sprintf.js |
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* The author (Ash Searle) has placed this code in the public domain: |
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* "This code is unrestricted: you are free to use it however you like." |
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* |
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*/ |
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(function($) { |
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/** |
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* Class: $.jqplot.Dragable |
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* Plugin to make plotted points dragable by the user. |
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*/ |
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$.jqplot.Dragable = function(options) { |
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// Group: Properties |
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this.markerRenderer = new $.jqplot.MarkerRenderer({shadow:false}); |
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this.shapeRenderer = new $.jqplot.ShapeRenderer(); |
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this.isDragging = false; |
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this.isOver = false; |
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this._ctx; |
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this._elem; |
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this._point; |
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this._gridData; |
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// prop: color |
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// CSS color spec for the dragged point (and adjacent line segment or bar). |
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this.color; |
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// prop: constrainTo |
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// Constrain dragging motion to an axis or to none. |
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// Allowable values are 'none', 'x', 'y' |
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this.constrainTo = 'none'; // 'x', 'y', or 'none'; |
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$.extend(true, this, options); |
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}; |
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function DragCanvas() { |
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$.jqplot.GenericCanvas.call(this); |
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this.isDragging = false; |
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this.isOver = false; |
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this._neighbor; |
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this._cursors = []; |
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} |
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DragCanvas.prototype = new $.jqplot.GenericCanvas(); |
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DragCanvas.prototype.constructor = DragCanvas; |
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// called within scope of series |
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$.jqplot.Dragable.parseOptions = function (defaults, opts) { |
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var options = opts || {}; |
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this.plugins.dragable = new $.jqplot.Dragable(options.dragable); |
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// since this function is called before series options are parsed, |
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// we can set this here and it will be overridden if needed. |
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this.isDragable = $.jqplot.config.enablePlugins; |
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}; |
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// called within context of plot |
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// create a canvas which we can draw on. |
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// insert it before the eventCanvas, so eventCanvas will still capture events. |
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// add a new DragCanvas object to the plot plugins to handle drawing on this new canvas. |
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$.jqplot.Dragable.postPlotDraw = function() { |
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// Memory Leaks patch |
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if (this.plugins.dragable && this.plugins.dragable.highlightCanvas) { |
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this.plugins.dragable.highlightCanvas.resetCanvas(); |
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this.plugins.dragable.highlightCanvas = null; |
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} |
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this.plugins.dragable = {previousCursor:'auto', isOver:false}; |
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this.plugins.dragable.dragCanvas = new DragCanvas(); |
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this.eventCanvas._elem.before(this.plugins.dragable.dragCanvas.createElement(this._gridPadding, 'jqplot-dragable-canvas', this._plotDimensions, this)); |
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var dctx = this.plugins.dragable.dragCanvas.setContext(); |
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}; |
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//$.jqplot.preInitHooks.push($.jqplot.Dragable.init); |
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$.jqplot.preParseSeriesOptionsHooks.push($.jqplot.Dragable.parseOptions); |
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$.jqplot.postDrawHooks.push($.jqplot.Dragable.postPlotDraw); |
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$.jqplot.eventListenerHooks.push(['jqplotMouseMove', handleMove]); |
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$.jqplot.eventListenerHooks.push(['jqplotMouseDown', handleDown]); |
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$.jqplot.eventListenerHooks.push(['jqplotMouseUp', handleUp]); |
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function initDragPoint(plot, neighbor) { |
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var s = plot.series[neighbor.seriesIndex]; |
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var drag = s.plugins.dragable; |
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// first, init the mark renderer for the dragged point |
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var smr = s.markerRenderer; |
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var mr = drag.markerRenderer; |
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mr.style = smr.style; |
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mr.lineWidth = smr.lineWidth + 2.5; |
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mr.size = smr.size + 5; |
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if (!drag.color) { |
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var rgba = $.jqplot.getColorComponents(smr.color); |
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var newrgb = [rgba[0], rgba[1], rgba[2]]; |
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var alpha = (rgba[3] >= 0.6) ? rgba[3]*0.6 : rgba[3]*(2-rgba[3]); |
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drag.color = 'rgba('+newrgb[0]+','+newrgb[1]+','+newrgb[2]+','+alpha+')'; |
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} |
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mr.color = drag.color; |
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mr.init(); |
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var start = (neighbor.pointIndex > 0) ? neighbor.pointIndex - 1 : 0; |
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var end = neighbor.pointIndex+2; |
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drag._gridData = s.gridData.slice(start, end); |
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} |
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function handleMove(ev, gridpos, datapos, neighbor, plot) { |
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if (plot.plugins.dragable.dragCanvas.isDragging) { |
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var dc = plot.plugins.dragable.dragCanvas; |
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var dp = dc._neighbor; |
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var s = plot.series[dp.seriesIndex]; |
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var drag = s.plugins.dragable; |
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var gd = s.gridData; |
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// compute the new grid position with any constraints. |
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var x = (drag.constrainTo == 'y') ? dp.gridData[0] : gridpos.x; |
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var y = (drag.constrainTo == 'x') ? dp.gridData[1] : gridpos.y; |
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// compute data values for any listeners. |
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var xu = s._xaxis.series_p2u(x); |
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var yu = s._yaxis.series_p2u(y); |
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// clear the canvas then redraw effect at new position. |
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var ctx = dc._ctx; |
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); |
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// adjust our gridData for the new mouse position |
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if (dp.pointIndex > 0) { |
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drag._gridData[1] = [x, y]; |
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} |
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else { |
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drag._gridData[0] = [x, y]; |
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} |
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plot.series[dp.seriesIndex].draw(dc._ctx, {gridData:drag._gridData, shadow:false, preventJqPlotSeriesDrawTrigger:true, color:drag.color, markerOptions:{color:drag.color, shadow:false}, trendline:{show:false}}); |
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plot.target.trigger('jqplotSeriesPointChange', [dp.seriesIndex, dp.pointIndex, [xu,yu], [x,y]]); |
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} |
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else if (neighbor != null) { |
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var series = plot.series[neighbor.seriesIndex]; |
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if (series.isDragable) { |
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var dc = plot.plugins.dragable.dragCanvas; |
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if (!dc.isOver) { |
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dc._cursors.push(ev.target.style.cursor); |
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ev.target.style.cursor = "pointer"; |
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} |
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dc.isOver = true; |
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} |
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} |
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else if (neighbor == null) { |
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var dc = plot.plugins.dragable.dragCanvas; |
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if (dc.isOver) { |
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ev.target.style.cursor = dc._cursors.pop(); |
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dc.isOver = false; |
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} |
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} |
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} |
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function handleDown(ev, gridpos, datapos, neighbor, plot) { |
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var dc = plot.plugins.dragable.dragCanvas; |
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dc._cursors.push(ev.target.style.cursor); |
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if (neighbor != null) { |
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var s = plot.series[neighbor.seriesIndex]; |
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var drag = s.plugins.dragable; |
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if (s.isDragable && !dc.isDragging) { |
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dc._neighbor = neighbor; |
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dc.isDragging = true; |
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initDragPoint(plot, neighbor); |
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drag.markerRenderer.draw(s.gridData[neighbor.pointIndex][0], s.gridData[neighbor.pointIndex][1], dc._ctx); |
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ev.target.style.cursor = "move"; |
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plot.target.trigger('jqplotDragStart', [neighbor.seriesIndex, neighbor.pointIndex, gridpos, datapos]); |
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} |
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} |
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// Just in case of a hickup, we'll clear the drag canvas and reset. |
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else { |
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var ctx = dc._ctx; |
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); |
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dc.isDragging = false; |
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} |
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} |
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function handleUp(ev, gridpos, datapos, neighbor, plot) { |
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if (plot.plugins.dragable.dragCanvas.isDragging) { |
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var dc = plot.plugins.dragable.dragCanvas; |
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// clear the canvas |
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var ctx = dc._ctx; |
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); |
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dc.isDragging = false; |
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// redraw the series canvas at the new point. |
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var dp = dc._neighbor; |
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var s = plot.series[dp.seriesIndex]; |
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var drag = s.plugins.dragable; |
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// compute the new grid position with any constraints. |
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var x = (drag.constrainTo == 'y') ? dp.data[0] : datapos[s.xaxis]; |
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var y = (drag.constrainTo == 'x') ? dp.data[1] : datapos[s.yaxis]; |
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// var x = datapos[s.xaxis]; |
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// var y = datapos[s.yaxis]; |
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s.data[dp.pointIndex][0] = x; |
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s.data[dp.pointIndex][1] = y; |
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plot.drawSeries({preventJqPlotSeriesDrawTrigger:true}, dp.seriesIndex); |
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dc._neighbor = null; |
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ev.target.style.cursor = dc._cursors.pop(); |
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plot.target.trigger('jqplotDragStop', [gridpos, datapos]); |
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} |
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} |
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})(jQuery); |