mirror of
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550 lines
22 KiB
JavaScript
550 lines
22 KiB
JavaScript
// version: 2015-11-02
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/**
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* o--------------------------------------------------------------------------------o
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* | This file is part of the RGraph package - you can learn more at: |
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* | |
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* | http://www.rgraph.net |
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* | |
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* | RGraph is dual licensed under the Open Source GPL (General Public License) |
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* | v2.0 license and a commercial license which means that you're not bound by |
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* | the terms of the GPL. The commercial license is just £99 (GBP) and you can |
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* | read about it here: |
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* | http://www.rgraph.net/license |
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* o--------------------------------------------------------------------------------o
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*/
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RGraph = window.RGraph || {isRGraph: true};
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// Module pattern
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(function (win, doc, undefined)
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{
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var RG = RGraph,
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ua = navigator.userAgent,
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ma = Math,
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active = null;
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/**
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* This function can be used to allow resizing
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*
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* @param object obj Your graph object
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*/
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RGraph.allowResizing =
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RGraph.AllowResizing = function (obj)
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{
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var ca = obj.canvas,
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co = obj.context,
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pa = RGraph.path;
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ca.resizing = ca.resizing || {};
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ca.resizing.placeHolders = ca.resizing.placeHolders || [];
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/**
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* Store the original width/height on the canvas
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*/
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if (!ca.resizing.originalw) { ca.resizing.originalw = ca.width; }
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if (!ca.resizing.originalh) { ca.resizing.originalh = ca.height; }
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// The size of the resize handle (so '15' isn't littered throughout the code)
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var resizeHandleSize = 15;
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// Add the original width and height to the canvas
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if ( !ca.resizing.__rgraph_original_width__
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|| !ca.resizing.__rgraph_original_height__
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|| !ca.resizing.__adjustX
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|| !ca.resizing.__adjustY
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) {
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ca.resizing.__rgraph_original_width__ = ca.width;
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ca.resizing.__rgraph_original_height__ = ca.height;
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ca.resizing.adjustX = (typeof obj.get('chart.resize.handle.adjust') == 'object' && typeof obj.get('chart.resize.handle.adjust')[0] == 'number' ? obj.Get('chart.resize.handle.adjust')[0] : 0);
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ca.resizing.adjustY = (typeof obj.get('chart.resize.handle.adjust') == 'object' && typeof obj.get('chart.resize.handle.adjust')[1] == 'number' ? obj.Get('chart.resize.handle.adjust')[1] : 0);
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ca.resizing.bgcolor = obj.get('chart.resize.handle.background') || 'rgba(0,0,0,0)';
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}
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// Draw the resize handle
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pa(co, ['b','m', ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX, ca.height - resizeHandleSize,'r', ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX, ca.height - resizeHandleSize + ca.resizing.adjustY, 2 * resizeHandleSize, resizeHandleSize,'f', ca.resizing.bgcolor]);
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// Draw the arrows
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pa(co, ['b','lw', 1,'m', ma.round(ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX), ca.height - resizeHandleSize + ca.resizing.adjustY,'l', ma.round(ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX), ca.height + ca.resizing.adjustY,'m',ca.width + ca.resizing.adjustX, ma.round(ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY),'l', ca.width - resizeHandleSize + ca.resizing.adjustX, ma.round(ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY), 's', 'gray', 'f', 'transparent']);
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// Top arrow head
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pa(co, [ 'b', 'm', ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX, ca.height - resizeHandleSize + ca.resizing.adjustY, 'l',ca.width - (resizeHandleSize / 2) + 3 + ca.resizing.adjustX, ca.height - resizeHandleSize + 3 + ca.resizing.adjustY, 'l',ca.width - (resizeHandleSize / 2) - 3 + ca.resizing.adjustX, ca.height - resizeHandleSize + 3 + ca.resizing.adjustY, 'c', 'f','gray']);
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// Bottom arrow head
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pa(co, ['b','m', ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX, ca.height + ca.resizing.adjustY,'l', ca.width - (resizeHandleSize / 2) + 3 + ca.resizing.adjustX, ca.height - 3 + ca.resizing.adjustY,'l', ca.width - (resizeHandleSize / 2) - 3 + ca.resizing.adjustX, ca.height - 3 + ca.resizing.adjustY,'c','f', 'gray']);
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// Left arrow head
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pa(co, ['b','m', ca.width - resizeHandleSize + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY,'l', ca.width - resizeHandleSize + 3 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + 3 + ca.resizing.adjustY,'l', ca.width - resizeHandleSize + 3 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) - 3 + ca.resizing.adjustY,'c','f', 'gray']);
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// Right arrow head
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pa(co, ['b','m',ca.width + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY,'l',ca.width - 3 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + 3 + ca.resizing.adjustY,'l',ca.width - 3 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) - 3 + ca.resizing.adjustY,'c','f', 'gray']);
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// Square at the centre of the arrows
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pa(co, ['b','m',ca.width + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY,'r',ca.width - (resizeHandleSize / 2) - 2 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) - 2 + ca.resizing.adjustY, 4, 4,'r',ca.width - (resizeHandleSize / 2) - 2 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) - 2 + ca.resizing.adjustY, 4, 4,'s','gray','f','white']);
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// Draw the "Reset" button
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pa(co, ['b','m',ma.round(ca.width - resizeHandleSize - 3 + ca.resizing.adjustX), ca.height - resizeHandleSize / 2 + ca.resizing.adjustY,'l',ma.round(ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX), ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY,'l',ca.width - resizeHandleSize - resizeHandleSize + 2 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) - 2 + ca.resizing.adjustY,'l',ca.width - resizeHandleSize - resizeHandleSize + 2 + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + 2 + ca.resizing.adjustY,'l',ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX, ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY,'s','gray','f','gray']);
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// The vertical line at the end of the reset button
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pa(co, ['b','m', ma.round(ca.width - resizeHandleSize - resizeHandleSize - 1 + ca.resizing.adjustX), ca.height - (resizeHandleSize / 2) - 3 + ca.resizing.adjustY,'l', ma.round(ca.width - resizeHandleSize - resizeHandleSize - 1 + ca.resizing.adjustX), ca.height - (resizeHandleSize / 2) + 3 + ca.resizing.adjustY,'s','f']);
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/**
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* The code inside this if() condition only runs once due to the if() condition tests- if
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* the obj.rgraphResizewrapper variable exists then the code has run
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*/
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if (obj.get('chart.resizable') && !ca.rgraphResizewrapper) {
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// ** TODO ** Needs fixing
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//
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//
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// Wrap the canvas
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// ** NEEDS FIXING **
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//
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ca.rgraphResizewrapper = $('<div id="rgraph_resize_container_' + ca.id +'"></div>').css({
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'float': ca.style.cssFloat,
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position: 'relative'
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}).get(0);
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$(ca).wrap(ca.rgraphResizewrapper);
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// TODO Might need to add more properties here (eg margin, padding etc)
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ca.style.cssFloat = 'none';
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ca.style.top = 0;
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ca.style.left = 0;
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var window_onmousemove = function (e)
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{
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var ca = active;
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if (ca) {
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e = RG.fixEventObject(e);
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if (ca.resizing.mousedown) {
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var newWidth = ca.width + (e.pageX - ca.resizing.originalx);
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var newHeight = ca.height + (e.pageY - ca.resizing.originaly);
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if (newWidth > (ca.resizing.originalw / 2)) {
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ca.resizing.div.style.width = newWidth + 'px';
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}
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if (newHeight > (ca.resizing.originalh / 2)) {
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ca.resizing.div.style.height = newHeight + 'px';
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}
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RG.fireCustomEvent(ca.__object__, 'onresize');
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}
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}
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}
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// Install the function as an event listener - but only once
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if (typeof(canvas.rgraph_resize_window_mousemove_listener_installed) != 'boolean') {
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window.addEventListener('mousemove', window_onmousemove, false);
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canvas.rgraph_resize_window_mousemove_listener_installed = true;
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}
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// The window onmouseup function
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var MouseupFunc = function (e)
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{
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if (!ca.resizing || !ca.resizing.div || !ca.resizing.mousedown) {
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return;
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}
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if (ca.resizing.div) {
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var div = ca.resizing.div;
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var coords = RG.getCanvasXY(ca);
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var parentNode = ca.parentNode;
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if (ca.style.position != 'absolute') {
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// Create a DIV to go in the canvases place
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var placeHolderDIV = document.createElement('DIV');
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placeHolderDIV.style.width = ca.resizing.originalw + 'px';
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placeHolderDIV.style.height = ca.resizing.originalh + 'px';
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placeHolderDIV.style.display = 'inline-block'; // Added 5th Nov 2010
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placeHolderDIV.style.position = ca.style.position;
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placeHolderDIV.style.left = ca.style.left;
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placeHolderDIV.style.top = ca.style.top;
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placeHolderDIV.style.cssFloat = ca.style.cssFloat;
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parentNode.insertBefore(placeHolderDIV, ca);
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}
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// Now set the canvas to be positioned absolutely
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ca.style.backgroundColor = 'white';
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ca.style.position = 'absolute';
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ca.style.border = '1px dashed gray';
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ca.style.boxShadow = '2px 2px 5px #ddd';
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ca.style.left = 0;//(ca.resizing.originalCanvasX - 2) + 'px';
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ca.style.top = 0;//(ca.resizing.originalCanvasY - 2) + 'px';
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// Set the dimensions of the canvas using the HTML attributes
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ca.width = parseInt(div.style.width);
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ca.height = parseInt(div.style.height);
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// Because resizing the canvas resets any tranformation - the antialias fix needs to be reapplied.
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ca.getContext('2d').translate(0.5,0.5);
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// Reset the gradient parsing status by setting all of the color values back to their original
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// values before Draw was first called
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var objects = RG.ObjectRegistry.getObjectsByCanvasID(ca.id);
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for (var i=0,len=objects.length; i<len; i+=1) {
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RG.resetColorsToOriginalValues(objects[i]);
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if (typeof objects[i].reset === 'function') {
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objects[i].reset();
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}
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}
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// Kill the background cache
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RG.cache = [];
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// Fire the onresize event
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RG.fireCustomEvent(canvas.__object__, 'onresizebeforedraw');
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RG.redrawCanvas(ca);
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// Get rid of transparent semi-opaque DIV
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ca.resizing.mousedown = false;
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div.style.display = 'none';
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document.body.removeChild(div);
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}
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// If there is zoom enabled in thumbnail mode, lose the zoom image
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if (RG.Registry.Get('chart.zoomed.div') || RGraph.Registry.Get('chart.zoomed.img')) {
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RG.Registry.Set('chart.zoomed.div', null);
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RG.Registry.Set('chart.zoomed.img', null);
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}
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// Fire the onresize event
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RG.FireCustomEvent(ca.__object__, 'onresizeend');
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};
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var window_onmouseup = MouseupFunc;
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// Install the function as an event listener - but only once
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if (typeof ca.rgraph_resize_window_mouseup_listener_installed != 'boolean') {
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window.addEventListener('mouseup', window_onmouseup, false);
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ca.rgraph_resize_window_mouseup_listener_installed = true;
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}
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var canvas_onmousemove = function (e)
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{
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e = RG.fixEventObject(e);
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var coords = RG.getMouseXY(e);
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var obj = e.target.__object__;
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var ca = e.target;
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var co = ca.getContext('2d');
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var cursor = ca.style.cursor;
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// Save the original cursor
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if (!ca.resizing.original_cursor) {
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ca.resizing.original_cursor = cursor;
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}
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if ( (coords[0] > (ca.width - resizeHandleSize)
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&& coords[0] < ca.width
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&& coords[1] > (ca.height - resizeHandleSize)
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&& coords[1] < ca.height)) {
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ca.style.cursor = 'move';
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} else if ( coords[0] > (ca.width - resizeHandleSize - resizeHandleSize)
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&& coords[0] < ca.width - resizeHandleSize
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&& coords[1] > (ca.height - resizeHandleSize)
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&& coords[1] < ca.height) {
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ca.style.cursor = 'pointer';
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} else {
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if (ca.resizing.original_cursor) {
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ca.style.cursor = ca.resizing.original_cursor;
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ca.resizing.original_cursor = null;
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} else {
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ca.style.cursor = 'default';
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}
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}
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};
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// Install the function as an event listener - but only once
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if (typeof ca.rgraph_resize_mousemove_listener_installed != 'boolean') {
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ca.addEventListener('mousemove', canvas_onmousemove, false);
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ca.rgraph_resize_mousemove_listener_installed = true;
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}
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var canvas_onmouseout = function (e)
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{
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e.target.style.cursor = 'default';
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e.target.title = '';
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};
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// Install the function as an event listener - but only once
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if (typeof ca.rgraph_resize_mouseout_listener_installed != 'boolean') {
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ca.addEventListener('mouseout', canvas_onmouseout, false);
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ca.rgraph_resize_mouseout_listener_installed = true;
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}
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var canvas_onmousedown = function (e)
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{
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e = RG.fixEventObject(e);
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var coords = RG.getMouseXY(e);
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var canvasXY = RG.getCanvasXY(e.target);
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var ca = e.target;
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/**
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* Set the active variable to the last canvas that was clicked on
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*/
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active = ca;
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if ( coords[0] > (ca.width - resizeHandleSize)
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&& coords[0] < ca.width
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&& coords[1] > (ca.height - resizeHandleSize)
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&& coords[1] < ca.height) {
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RG.fireCustomEvent(obj, 'onresizebegin');
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// Save the existing border
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if (ca.resizing.original_css_border == null) {
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ca.resizing.original_css_border = ca.style.border;
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}
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// Save the existing shadow
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if (ca.resizing.original_css_shadow == null) {
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ca.resizing.original_css_shadow = ca.style.boxShadow;
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}
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ca.resizing.mousedown = true;
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// Create the semi-opaque DIV
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var div = document.createElement('DIV');
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div.style.position = 'absolute';
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div.style.left = canvasXY[0] + 'px';
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div.style.top = canvasXY[1] + 'px';
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div.style.width = ca.width + 'px';
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div.style.height = ca.height + 'px';
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div.style.border = '1px dotted black';
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div.style.backgroundColor = 'gray';
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div.style.opacity = 0.5;
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div.__canvas__ = e.target;
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document.body.appendChild(div);
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ca.resizing.div = div;
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ca.resizing.placeHolders.push(div);
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// Hide the previous resize indicator layers. This is only necessary it seems for the Meter chart
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for (var i=0; i<(ca.resizing.placeHolders.length - 1); ++i) {
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ca.resizing.placeHolders[i].style.display = 'none';
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}
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// This is a repetition of the window.onmouseup function (No need to use DOM2 here)
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div.onmouseup = function (e)
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{
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MouseupFunc(e);
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}
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// No need to use DOM2 here
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ca.resizing.div.onmouseover = function (e)
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{
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e = RG.fixEventObject(e);
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e.stopPropagation();
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}
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// The mouse
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ca.resizing.originalx = e.pageX;
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ca.resizing.originaly = e.pageY;
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ca.resizing.originalCanvasX = RG.getCanvasXY(ca)[0];
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ca.resizing.originalCanvasY = RG.getCanvasXY(ca)[1];
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}
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// This facilitates the reset button
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if ( coords[0] > (ca.width - resizeHandleSize - resizeHandleSize)
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&& coords[0] < ca.width - resizeHandleSize
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&& coords[1] > (ca.height - resizeHandleSize)
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&& coords[1] < ca.height
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&& ca.resizing.originalw
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&& ca.resizing.originaly) {
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// Fire the onresizebegin event
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RG.fireCustomEvent(ca.__object__, 'onresizebegin');
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// Restore the original width and height
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ca.width = ca.resizing.originalw;
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ca.height = ca.resizing.originalh;
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// TODO Need to check the parent is actually a DIV container or not?
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// Show the link if it exists and the display is set to none
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if (ca.__link__ && ca.__link__.style.display === 'none') {
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ca.__link__.style.display = 'inline';
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}
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if (typeof ca.parentNode.id === 'string' && ca.parentNode.id.substring(0, 24) === 'rgraph_resize_container_') {
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ca.parentNode.style.width = ca.resizing.originalw + 'px';
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ca.parentNode.style.height = ca.resizing.originalh + 'px';
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}
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// Lose the border
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ca.style.border = ca.resizing.original_css_border;
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//Lose the shadow
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ca.style.boxShadow = ca.resizing.original_css_shadow;
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|
|
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// Add 1 pixel to the top/left because the border is going
|
|
ca.style.left = (parseInt(ca.style.left)) + 'px';
|
|
ca.style.top = (parseInt(ca.style.top)) + 'px';
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|
|
|
|
|
|
|
// Because resetting the canvas resizes it - and so loses any translation - need to reapply the
|
|
// antialiasing translation
|
|
ca.getContext('2d').translate(0.5,0.5);
|
|
|
|
|
|
RG.fireCustomEvent(ca.__object__, 'onresizebeforedraw');
|
|
|
|
// Since gradients are pre-parsed colors - this resets the colors to what they were
|
|
// before the parsing.
|
|
var objects = RG.ObjectRegistry.getObjectsByCanvasID(ca.id);
|
|
for (var i=0; i<objects.length; i+=1) {
|
|
RG.resetColorsToOriginalValues(objects[i]);
|
|
if (objects[i].reset) {
|
|
objects[i].reset();
|
|
}
|
|
|
|
RG.redrawCanvas(objects[i].canvas);
|
|
}
|
|
|
|
|
|
// Clear the cache so that old things (eg backgrounds) are not reused
|
|
RG.cache = [];
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Redraw the canvas
|
|
//RG.redrawCanvas(objects[i].canvas);
|
|
|
|
|
|
// Set the width and height on the DIV
|
|
if (ca.resizing.div) {
|
|
ca.resizing.div.style.width = ca.__original_width__ + 'px';
|
|
ca.resizing.div.style.height = ca.__original_height__ + 'px';
|
|
}
|
|
|
|
|
|
// Fire the resize event
|
|
RG.fireCustomEvent(ca.__object__, 'onresize');
|
|
RG.fireCustomEvent(ca.__object__, 'onresizeend');
|
|
}
|
|
};
|
|
|
|
// Install the function as an event listener - but only once
|
|
if (typeof ca.rgraph_resize_mousedown_listener_installed != 'boolean') {
|
|
ca.addEventListener('mousedown', canvas_onmousedown, false);
|
|
ca.rgraph_resize_mousedown_listener_installed = true;
|
|
}
|
|
}
|
|
};
|
|
// End module pattern
|
|
})(window, document); |