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|
/**
* o------------------------------------------------------------------------------o
* | This file is part of the RGraph package - you can learn more at: |
* | |
* | http://www.rgraph.net |
* | |
* | This package is licensed under the RGraph license. For all kinds of business |
* | purposes there is a small one-time licensing fee to pay and for non |
* | commercial purposes it is free to use. You can read the full license here: |
* | |
* | http://www.rgraph.net/LICENSE.txt |
* o------------------------------------------------------------------------------o
*/
if (typeof(RGraph) == 'undefined') RGraph = {isRGraph:true,type:'common'};
/**
* The function which controls the annotate feature
*
* @param object obj The graph object
*/
RGraph.Annotate = function (obj)
{
/**
* This installs some event handlers
*/
if (obj.Get('chart.annotatable')) {
var canvas = obj.canvas;
var context = obj.context;
/**
* Capture the mouse events so we can set whther the mouse is down or not
*/
var canvas_onmousedown = function (e)
{
if (e.button == 0) {
e.target.__object__.Set('chart.mousedown', true);
// Get the context
var obj = e.target.__object__;
var context = obj.context;
// Don't want any "joining" lines or colour "bleeding"
context.beginPath();
// Accommodate Chrome
var coords = RGraph.getMouseXY(e);
var x = coords[0];
var y = coords[1];
// Clear the annotation recording
RGraph.Registry.Set('annotate.actions', [obj.Get('chart.annotate.color')]);
context.strokeStyle = obj.Get('chart.annotate.color');
context.moveTo(x, y);
// Set the lineWidth
context.lineWidth = 1;
RGraph.Registry.Set('started.annotating', false);
RGraph.Registry.Set('chart.annotating', obj);
/**
* Fire the onannotatebegin event. It also fires an event called ononnotatestart for BC purposes
*/
RGraph.FireCustomEvent(obj, 'onannotatestart');
RGraph.FireCustomEvent(obj, 'onannotatebegin');
}
return false;
}
canvas.addEventListener('mousedown', canvas_onmousedown, false);
RGraph.AddEventListener(canvas.id, 'mousedown', canvas_onmousedown);
/**
* This cancels annotating for ALL canvases
*/
var window_onmouseup = function (e)
{
var obj = RGraph.Registry.Get('chart.annotating');
var tags = document.getElementsByTagName('canvas');
for (var i=0; i<tags.length; ++i) {
if (tags[i].__object__) {
tags[i].__object__.Set('chart.mousedown', false);
}
}
if (e.button != 0 || !obj) {
return;
}
// Store the annotations in browser storage if it's available
if (RGraph.Registry.Get('annotate.actions') && RGraph.Registry.Get('annotate.actions').length > 0 && window.localStorage) {
var id = '__rgraph_annotations_' + e.target.id + '__';
var annotations = window.localStorage[id] ? window.localStorage[id] + '|' : '';
annotations += RGraph.Registry.Get('annotate.actions');
// Store the annotations information in HTML5 browser storage here
window.localStorage[id] = annotations;
}
// Clear the recorded annotations
RGraph.Registry.Set('annotate.actions', []);
/**
* Fire the annotate event
*/
RGraph.FireCustomEvent(obj, 'onannotateend');
}
window.addEventListener('mouseup', window_onmouseup, false);
RGraph.AddEventListener(canvas.id, 'window_mouseup', window_onmouseup);
/**
* Canvas onmouseup event
*/
var canvas_onmouseup = function (e)
{
var obj = e.target.__object__;
RGraph.Registry.Set('chart.mousedown', false);
}
canvas.addEventListener('mouseup', canvas_onmouseup, false);
RGraph.AddEventListener(canvas.id, 'mouseup', canvas_onmouseup);
/**
* The canvas onmousemove function
*/
var canvas_onmousemove = function (e)
{
var e = RGraph.FixEventObject(e);
var obj = e.target.__object__;
var coords = RGraph.getMouseXY(e);
var x = coords[0];
var y = coords[1];
var width = canvas.width;
var height = canvas.height;
obj.context.lineWidth = 1;
// Don't allow annotating in the gutter
//
// CHANGED 20TH DECEMBER 2010 TO ALLOW ANNOTATING IN THE GUTTER
if (true) {
canvas.style.cursor = 'crosshair';
if (obj.Get('chart.mousedown')) {
// Special case for HBars and Gantts with their extra wide left gutter
if ( (obj.type != 'hbar' && obj.type != 'gantt') || x > obj.gutterLeft) {
/**
* This is here to stop annotating in the gutter
*/
if (RGraph.Registry.Get('started.annotating') == false) {
context.moveTo(x, y);
RGraph.Registry.Set('started.annotating', true)
}
context.lineTo(x, y);
RGraph.Registry.Set('annotate.actions', RGraph.Registry.Get('annotate.actions') + '|' + x + ',' + y);
context.stroke();
/**
* Fire the annotate event
*/
RGraph.FireCustomEvent(obj, 'onannotate');
}
}
} else {
canvas.style.cursor = 'default';
}
}
canvas.addEventListener('mousemove', canvas_onmousemove, false);
RGraph.AddEventListener(canvas.id, 'mousemove', canvas_onmousemove);
RGraph.ReplayAnnotations(obj);
}
}
/**
* Shows the mini palette used for annotations
*
* @param object e The event object
*/
RGraph.Showpalette = function (e)
{
var isSafari = navigator.userAgent.indexOf('Safari') ? true : false;
e = RGraph.FixEventObject(e);
var canvas = e.target.parentNode.__canvas__;
var context = canvas.getContext('2d');
var obj = canvas.__object__;
var div = document.createElement('DIV');
var coords = RGraph.getMouseXY(e);
div.__object__ = obj; // The graph object
div.className = 'RGraph_palette';
div.style.position = 'absolute';
div.style.backgroundColor = 'white';
div.style.border = '1px solid black';
div.style.left = 0;
div.style.top = 0;
div.style.padding = '3px';
div.style.paddingBottom = 0;
div.style.paddingRight = 0;
div.style.opacity = 0;
div.style.boxShadow = 'rgba(96,96,96,0.5) 3px 3px 3px';
div.style.WebkitBoxShadow = 'rgba(96,96,96,0.5) 3px 3px 3px';
div.style.MozBoxShadow = 'rgba(96,96,96,0.5) 3px 3px 3px';
div.style.filter = 'progid:DXImageTransform.Microsoft.Shadow(color=#666666,direction=135)';
var common_css = 'padding: 1px; display: inline; display: inline-block; width: 15px; height: 15px; margin-right: 3px; cursor: pointer;' + (isSafari ? 'margin-bottom: 3px' : '');
var common_mouseover = ' onmouseover="this.style.border = \'1px black solid\'; this.style.padding = 0"';
var common_mouseout = ' onmouseout="this.style.border = 0; this.style.padding = \'1px\'" ';
var str = '';
var colors = ['red', 'blue', 'green', 'black', 'yellow', 'magenta', 'pink', 'cyan', 'purple', '#ddf', 'gray', '#36905c'];
for (i=0; i<colors.length; ++i) {
str = str + '<span ' + common_mouseover + common_mouseout + ' style="background-color: ' + colors[i] + '; ' + common_css + '" onclick="this.parentNode.__object__.Set(\'chart.annotate.color\', this.style.backgroundColor); this.parentNode.style.display = \'none\'; RGraph.FireCustomEvent(this.parentNode.__object__, \'onannotatecolor\')"> </span>';
// This makes the colours go across two levels
if (i == 5) {
str += '<br />';
}
}
div.innerHTML = str;
document.body.appendChild(div);
/**
* Now the div has been added to the document, move it up and left and set the width and height
*/
div.style.width = (div.offsetWidth) + 'px';
div.style.height = (div.offsetHeight - (RGraph.isIE9up() ? 5 : 5)) + 'px';
div.style.left = Math.max(0, e.pageX - div.offsetWidth - 2) + 'px';
div.style.top = (e.pageY - div.offsetHeight - 2) + 'px';
/**
* Store the palette div in the registry
*/
RGraph.Registry.Set('palette', div);
setTimeout("RGraph.Registry.Get('palette').style.opacity = 0.2", 50);
setTimeout("RGraph.Registry.Get('palette').style.opacity = 0.4", 100);
setTimeout("RGraph.Registry.Get('palette').style.opacity = 0.6", 150);
setTimeout("RGraph.Registry.Get('palette').style.opacity = 0.8", 200);
setTimeout("RGraph.Registry.Get('palette').style.opacity = 1", 250);
RGraph.HideContext();
window.onclick = function ()
{
RGraph.HidePalette();
}
// Should this be here? Yes. This function is being used as an event handler.
e.stopPropagation();
return false;
}
/**
* Clears any annotation data from global storage
*
* @param string id The ID of the canvas
*/
RGraph.ClearAnnotations = function (id)
{
var canvas = document.getElementById(id);
var obj = canvas.__object__;
if (window.localStorage && window.localStorage['__rgraph_annotations_' + id + '__'] && window.localStorage['__rgraph_annotations_' + id + '__'].length) {
window.localStorage['__rgraph_annotations_' + id + '__'] = [];
RGraph.FireCustomEvent(obj, 'onannotateclear');
}
}
/**
* Replays stored annotations
*
* @param object obj The graph object
*/
RGraph.ReplayAnnotations = function (obj)
{
// Check for support
if (!window.localStorage) {
return;
}
var context = obj.context;
var annotations = window.localStorage['__rgraph_annotations_' + obj.id + '__'];
var i, len, move, coords;
context.beginPath();
context.lineWidth = 2;
if (annotations && annotations.length) {
annotations = annotations.split('|');
} else {
return;
}
for (i=0, len=annotations.length; i<len; ++i) {
if (!annotations[i].match(/^[0-9]+,[0-9]+$/)) {
context.stroke();
context.beginPath();
context.strokeStyle = annotations[i];
move = true;
continue;
}
coords = annotations[i].split(',');
if (move) {
context.moveTo(coords[0], coords[1]);
move = false;
} else {
context.lineTo(coords[0], coords[1]);
}
}
context.stroke();
}
|
