www.gusucode.com > Piwik 网站流量统计系统 v2.9.1PHP源码程序 > Piwik 网站流量统计系统 v2.9.1/piwik/piwik/libs/jqplot/jqplot.canvasGridRenderer.js
/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: @VERSION
* Revision: @REVISION
*
* Copyright (c) 2009-2013 Chris Leonello
* jqPlot is currently available for use in all personal or commercial projects
* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
* choose the license that best suits your project and use it accordingly.
*
* Although not required, the author would appreciate an email letting him
* know of any substantial use of jqPlot. You can reach the author at:
* chris at jqplot dot com or see http://www.jqplot.com/info.php .
*
* If you are feeling kind and generous, consider supporting the project by
* making a donation at: http://www.jqplot.com/donate.php .
*
* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
*
* version 2007.04.27
* author Ash Searle
* http://hexmen.com/blog/2007/03/printf-sprintf/
* http://hexmen.com/js/sprintf.js
* The author (Ash Searle) has placed this code in the public domain:
* "This code is unrestricted: you are free to use it however you like."
*
*/
(function($) {
// Class: $.jqplot.CanvasGridRenderer
// The default jqPlot grid renderer, creating a grid on a canvas element.
// The renderer has no additional options beyond the <Grid> class.
$.jqplot.CanvasGridRenderer = function(){
this.shadowRenderer = new $.jqplot.ShadowRenderer();
};
// called with context of Grid object
$.jqplot.CanvasGridRenderer.prototype.init = function(options) {
this._ctx;
$.extend(true, this, options);
// set the shadow renderer options
var sopts = {lineJoin:'miter', lineCap:'round', fill:false, isarc:false, angle:this.shadowAngle, offset:this.shadowOffset, alpha:this.shadowAlpha, depth:this.shadowDepth, lineWidth:this.shadowWidth, closePath:false, strokeStyle:this.shadowColor};
this.renderer.shadowRenderer.init(sopts);
};
// called with context of Grid.
$.jqplot.CanvasGridRenderer.prototype.createElement = function(plot) {
var elem;
// Memory Leaks patch
if (this._elem) {
if ($.jqplot.use_excanvas && window.G_vmlCanvasManager.uninitElement !== undefined) {
elem = this._elem.get(0);
window.G_vmlCanvasManager.uninitElement(elem);
elem = null;
}
this._elem.emptyForce();
this._elem = null;
}
elem = plot.canvasManager.getCanvas();
var w = this._plotDimensions.width;
var h = this._plotDimensions.height;
elem.width = w;
elem.height = h;
this._elem = $(elem);
this._elem.addClass('jqplot-grid-canvas');
this._elem.css({ position: 'absolute', left: 0, top: 0 });
elem = plot.canvasManager.initCanvas(elem);
this._top = this._offsets.top;
this._bottom = h - this._offsets.bottom;
this._left = this._offsets.left;
this._right = w - this._offsets.right;
this._width = this._right - this._left;
this._height = this._bottom - this._top;
// avoid memory leak
elem = null;
return this._elem;
};
$.jqplot.CanvasGridRenderer.prototype.draw = function() {
this._ctx = this._elem.get(0).getContext("2d");
var ctx = this._ctx;
var axes = this._axes;
// Add the grid onto the grid canvas. This is the bottom most layer.
ctx.save();
ctx.clearRect(0, 0, this._plotDimensions.width, this._plotDimensions.height);
ctx.fillStyle = this.backgroundColor || this.background;
ctx.fillRect(this._left, this._top, this._width, this._height);
ctx.save();
ctx.lineJoin = 'miter';
ctx.lineCap = 'butt';
ctx.lineWidth = this.gridLineWidth;
ctx.strokeStyle = this.gridLineColor;
var b, e, s, m;
var ax = ['xaxis', 'yaxis', 'x2axis', 'y2axis'];
for (var i=4; i>0; i--) {
var name = ax[i-1];
var axis = axes[name];
var ticks = axis._ticks;
var numticks = ticks.length;
if (axis.show) {
if (axis.drawBaseline) {
var bopts = {};
if (axis.baselineWidth !== null) {
bopts.lineWidth = axis.baselineWidth;
}
if (axis.baselineColor !== null) {
bopts.strokeStyle = axis.baselineColor;
}
switch (name) {
case 'xaxis':
drawLine (this._left, this._bottom, this._right, this._bottom, bopts);
break;
case 'yaxis':
drawLine (this._left, this._bottom, this._left, this._top, bopts);
break;
case 'x2axis':
drawLine (this._left, this._bottom, this._right, this._bottom, bopts);
break;
case 'y2axis':
drawLine (this._right, this._bottom, this._right, this._top, bopts);
break;
}
}
for (var j=numticks; j>0; j--) {
var t = ticks[j-1];
if (t.show) {
var pos = Math.round(axis.u2p(t.value)) + 0.5;
switch (name) {
case 'xaxis':
// draw the grid line if we should
if (t.showGridline && this.drawGridlines && ((!t.isMinorTick && axis.drawMajorGridlines) || (t.isMinorTick && axis.drawMinorGridlines)) ) {
drawLine(pos, this._top, pos, this._bottom);
}
// draw the mark
if (t.showMark && t.mark && ((!t.isMinorTick && axis.drawMajorTickMarks) || (t.isMinorTick && axis.drawMinorTickMarks)) ) {
s = t.markSize;
m = t.mark;
var pos = Math.round(axis.u2p(t.value)) + 0.5;
switch (m) {
case 'outside':
b = this._bottom;
e = this._bottom+s;
break;
case 'inside':
b = this._bottom-s;
e = this._bottom;
break;
case 'cross':
b = this._bottom-s;
e = this._bottom+s;
break;
default:
b = this._bottom;
e = this._bottom+s;
break;
}
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, [[pos,b],[pos,e]], {lineCap:'butt', lineWidth:this.gridLineWidth, offset:this.gridLineWidth*0.75, depth:2, fill:false, closePath:false});
}
// draw the line
drawLine(pos, b, pos, e);
}
break;
case 'yaxis':
// draw the grid line
if (t.showGridline && this.drawGridlines && ((!t.isMinorTick && axis.drawMajorGridlines) || (t.isMinorTick && axis.drawMinorGridlines)) ) {
drawLine(this._right, pos, this._left, pos);
}
// draw the mark
if (t.showMark && t.mark && ((!t.isMinorTick && axis.drawMajorTickMarks) || (t.isMinorTick && axis.drawMinorTickMarks)) ) {
s = t.markSize;
m = t.mark;
var pos = Math.round(axis.u2p(t.value)) + 0.5;
switch (m) {
case 'outside':
b = this._left-s;
e = this._left;
break;
case 'inside':
b = this._left;
e = this._left+s;
break;
case 'cross':
b = this._left-s;
e = this._left+s;
break;
default:
b = this._left-s;
e = this._left;
break;
}
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, [[b, pos], [e, pos]], {lineCap:'butt', lineWidth:this.gridLineWidth*1.5, offset:this.gridLineWidth*0.75, fill:false, closePath:false});
}
drawLine(b, pos, e, pos, {strokeStyle:axis.borderColor});
}
break;
case 'x2axis':
// draw the grid line
if (t.showGridline && this.drawGridlines && ((!t.isMinorTick && axis.drawMajorGridlines) || (t.isMinorTick && axis.drawMinorGridlines)) ) {
drawLine(pos, this._bottom, pos, this._top);
}
// draw the mark
if (t.showMark && t.mark && ((!t.isMinorTick && axis.drawMajorTickMarks) || (t.isMinorTick && axis.drawMinorTickMarks)) ) {
s = t.markSize;
m = t.mark;
var pos = Math.round(axis.u2p(t.value)) + 0.5;
switch (m) {
case 'outside':
b = this._top-s;
e = this._top;
break;
case 'inside':
b = this._top;
e = this._top+s;
break;
case 'cross':
b = this._top-s;
e = this._top+s;
break;
default:
b = this._top-s;
e = this._top;
break;
}
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, [[pos,b],[pos,e]], {lineCap:'butt', lineWidth:this.gridLineWidth, offset:this.gridLineWidth*0.75, depth:2, fill:false, closePath:false});
}
drawLine(pos, b, pos, e);
}
break;
case 'y2axis':
// draw the grid line
if (t.showGridline && this.drawGridlines && ((!t.isMinorTick && axis.drawMajorGridlines) || (t.isMinorTick && axis.drawMinorGridlines)) ) {
drawLine(this._left, pos, this._right, pos);
}
// draw the mark
if (t.showMark && t.mark && ((!t.isMinorTick && axis.drawMajorTickMarks) || (t.isMinorTick && axis.drawMinorTickMarks)) ) {
s = t.markSize;
m = t.mark;
var pos = Math.round(axis.u2p(t.value)) + 0.5;
switch (m) {
case 'outside':
b = this._right;
e = this._right+s;
break;
case 'inside':
b = this._right-s;
e = this._right;
break;
case 'cross':
b = this._right-s;
e = this._right+s;
break;
default:
b = this._right;
e = this._right+s;
break;
}
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, [[b, pos], [e, pos]], {lineCap:'butt', lineWidth:this.gridLineWidth*1.5, offset:this.gridLineWidth*0.75, fill:false, closePath:false});
}
drawLine(b, pos, e, pos, {strokeStyle:axis.borderColor});
}
break;
default:
break;
}
}
}
t = null;
}
axis = null;
ticks = null;
}
// Now draw grid lines for additional y axes
//////
// TO DO: handle yMidAxis
//////
ax = ['y3axis', 'y4axis', 'y5axis', 'y6axis', 'y7axis', 'y8axis', 'y9axis', 'yMidAxis'];
for (var i=7; i>0; i--) {
var axis = axes[ax[i-1]];
var ticks = axis._ticks;
if (axis.show) {
var tn = ticks[axis.numberTicks-1];
var t0 = ticks[0];
var left = axis.getLeft();
var points = [[left, tn.getTop() + tn.getHeight()/2], [left, t0.getTop() + t0.getHeight()/2 + 1.0]];
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, points, {lineCap:'butt', fill:false, closePath:false});
}
// draw the line
drawLine(points[0][0], points[0][1], points[1][0], points[1][1], {lineCap:'butt', strokeStyle:axis.borderColor, lineWidth:axis.borderWidth});
// draw the tick marks
for (var j=ticks.length; j>0; j--) {
var t = ticks[j-1];
s = t.markSize;
m = t.mark;
var pos = Math.round(axis.u2p(t.value)) + 0.5;
if (t.showMark && t.mark) {
switch (m) {
case 'outside':
b = left;
e = left+s;
break;
case 'inside':
b = left-s;
e = left;
break;
case 'cross':
b = left-s;
e = left+s;
break;
default:
b = left;
e = left+s;
break;
}
points = [[b,pos], [e,pos]];
// draw the shadow
if (this.shadow) {
this.renderer.shadowRenderer.draw(ctx, points, {lineCap:'butt', lineWidth:this.gridLineWidth*1.5, offset:this.gridLineWidth*0.75, fill:false, closePath:false});
}
// draw the line
drawLine(b, pos, e, pos, {strokeStyle:axis.borderColor});
}
t = null;
}
t0 = null;
}
axis = null;
ticks = null;
}
ctx.restore();
function drawLine(bx, by, ex, ey, opts) {
ctx.save();
opts = opts || {};
if (opts.lineWidth == null || opts.lineWidth != 0){
$.extend(true, ctx, opts);
ctx.beginPath();
ctx.moveTo(bx, by);
ctx.lineTo(ex, ey);
ctx.stroke();
ctx.restore();
}
}
if (this.shadow) {
var points = [[this._left, this._bottom], [this._right, this._bottom], [this._right, this._top]];
this.renderer.shadowRenderer.draw(ctx, points);
}
// Now draw border around grid. Use axis border definitions. start at
// upper left and go clockwise.
if (this.borderWidth != 0 && this.drawBorder) {
drawLine (this._left, this._top, this._right, this._top, {lineCap:'round', strokeStyle:axes.x2axis.borderColor, lineWidth:axes.x2axis.borderWidth});
drawLine (this._right, this._top, this._right, this._bottom, {lineCap:'round', strokeStyle:axes.y2axis.borderColor, lineWidth:axes.y2axis.borderWidth});
drawLine (this._right, this._bottom, this._left, this._bottom, {lineCap:'round', strokeStyle:axes.xaxis.borderColor, lineWidth:axes.xaxis.borderWidth});
drawLine (this._left, this._bottom, this._left, this._top, {lineCap:'round', strokeStyle:axes.yaxis.borderColor, lineWidth:axes.yaxis.borderWidth});
}
// ctx.lineWidth = this.borderWidth;
// ctx.strokeStyle = this.borderColor;
// ctx.strokeRect(this._left, this._top, this._width, this._height);
ctx.restore();
ctx = null;
axes = null;
};
})(jQuery);