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224 lines
9.3 KiB
JavaScript
224 lines
9.3 KiB
JavaScript
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/**
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* jqPlot
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* Pure JavaScript plotting plugin using jQuery
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*
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* Version: 1.0.0b2_r792
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*
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* Copyright (c) 2009-2011 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);
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