// version: 2017-11-25
/**
* o--------------------------------------------------------------------------------o
* | This file is part of the RGraph package - you can learn more at: |
* | |
* | http://www.rgraph.net |
* | |
* | RGraph is licensed under the Open Source MIT license. That means that it's |
* | totally free to use and there are no restrictions on what you can do with it! |
* o--------------------------------------------------------------------------------o
*/
RGraph = window.RGraph || {isRGraph: true};
// Module pattern
(function (win, doc, undefined)
{
var RG = RGraph,
ua = navigator.userAgent,
ma = Math,
active = null;
/**
* This function can be used to allow resizing
*
* @param object obj Your graph object
*/
RGraph.allowResizing =
RGraph.AllowResizing = function (obj)
{
var ca = obj.canvas,
co = obj.context,
pa2 = RG.path2;
ca.resizing = ca.resizing || {};
ca.resizing.placeHolders = ca.resizing.placeHolders || [];
/**
* Store the original width/height on the canvas
*/
if (!ca.resizing.originalw) { ca.resizing.originalw = ca.width; }
if (!ca.resizing.originalh) { ca.resizing.originalh = ca.height; }
// The size of the resize handle (so '15' isn't littered throughout the code)
var resizeHandleSize = 15;
// Add the original width and height to the canvas
if ( !ca.resizing.__rgraph_original_width__
|| !ca.resizing.__rgraph_original_height__
|| !ca.resizing.__adjustX
|| !ca.resizing.__adjustY
) {
ca.resizing.__rgraph_original_width__ = ca.width;
ca.resizing.__rgraph_original_height__ = ca.height;
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);
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);
ca.resizing.bgcolor = obj.get('chart.resize.handle.background') || 'rgba(0,0,0,0)';
}
// Draw the resize handle
pa2(co,
'b m % % r % % % % f %',
ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX, ca.height - resizeHandleSize,
ca.width - resizeHandleSize - resizeHandleSize + ca.resizing.adjustX, ca.height - resizeHandleSize + ca.resizing.adjustY, 2 * resizeHandleSize, resizeHandleSize,
ca.resizing.bgcolor
);
// Draw the arrows
pa2(co,
'b lw 1 m % % l % % m % % l % % s gray f transparent',
ma.round(ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX), ca.height - resizeHandleSize + ca.resizing.adjustY,
ma.round(ca.width - (resizeHandleSize / 2) + ca.resizing.adjustX), ca.height + ca.resizing.adjustY,
ca.width + ca.resizing.adjustX, ma.round(ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY),
ca.width - resizeHandleSize + ca.resizing.adjustX, ma.round(ca.height - (resizeHandleSize / 2) + ca.resizing.adjustY)
);
// Top arrow head
pa2(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']);
// Bottom arrow head
pa2(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']);
// Left arrow head
pa2(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']);
// Right arrow head
pa2(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']);
// Square at the centre of the arrows
pa2(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']);
// Draw the "Reset" button
pa2(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']);
// The vertical line at the end of the reset button
pa2(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']);
/**
* The code inside this if() condition only runs once due to the if() condition tests- if
* the obj.rgraphResizewrapper variable exists then the code has run
*/
if (obj.get('chart.resizable') && !ca.rgraphResizewrapper) {
// ** TODO ** Needs fixing
//
//
// Wrap the canvas
// ** NEEDS FIXING **
//
ca.rgraphResizewrapper = $('<div id="rgraph_resize_container_' + ca.id +'"></div>').css({
'float': ca.style.cssFloat,
position: 'relative'
}).get(0);
$(ca).wrap(ca.rgraphResizewrapper);
// TODO Might need to add more properties here (eg margin, padding etc)
ca.style.cssFloat = 'none';
ca.style.top = 0;
ca.style.left = 0;
var window_onmousemove = function (e)
{
var ca = active,
obj = ca ? ca.__object__ : null;
if (ca) {
e = RG.fixEventObject(e);
if (ca.resizing.mousedown) {
var newWidth = ca.width + (e.pageX - ca.resizing.originalx),
newHeight = ca.height + (e.pageY - ca.resizing.originaly),
minWidth = obj.get('resizableMinwidth'),
minHeight = obj.get('resizableMinheight');
// Check for maximum width
if (newWidth > (ca.resizing.originalw / 2) && (typeof obj.get('resizableMaxwidth') === 'number' ? newWidth < obj.get('resizableMaxwidth') : true) &&
(typeof minWidth === 'number' ? newWidth > minWidth : true)
) {
ca.resizing.div.style.width = newWidth + 'px';
}
// Check for maximum height
if (newHeight > (ca.resizing.originalh / 2) && (typeof obj.get('resizableMaxheight') === 'number' ? newHeight < obj.get('resizableMaxheight') : true) &&
(typeof minHeight === 'number' ? newHeight > minHeight : true)
) {
ca.resizing.div.style.height = newHeight + 'px';
}
RG.fireCustomEvent(ca.__object__, 'onresize');
}
}
}
// Install the function as an event listener - but only once
if (typeof ca.rgraph_resize_window_mousemove_listener_installed != 'boolean') {
window.addEventListener('mousemove', window_onmousemove, false);
ca.rgraph_resize_window_mousemove_listener_installed = true;
}
// The window onmouseup function
var MouseupFunc = function (e)
{
if (!ca.resizing || !ca.resizing.div || !ca.resizing.mousedown) {
return;
}
if (ca.resizing.div) {
var div = ca.resizing.div;
var coords = RG.getCanvasXY(ca);
var parentNode = ca.parentNode;
if (ca.style.position != 'absolute') {
// Create a DIV to go in the canvases place
var placeHolderDIV = document.createElement('DIV');
placeHolderDIV.style.width = ca.resizing.originalw + 'px';
placeHolderDIV.style.height = ca.resizing.originalh + 'px';
placeHolderDIV.style.display = 'inline-block'; // Added 5th Nov 2010
placeHolderDIV.style.position = ca.style.position;
placeHolderDIV.style.left = ca.style.left;
placeHolderDIV.style.top = ca.style.top;
placeHolderDIV.style.cssFloat = ca.style.cssFloat;
parentNode.insertBefore(placeHolderDIV, ca);
}
// Now set the canvas to be positioned absolutely
ca.style.backgroundColor = 'white';
ca.style.position = 'absolute';
ca.style.border = '1px dashed gray';
ca.style.boxShadow = '2px 2px 5px #ddd';
ca.style.left = 0;//(ca.resizing.originalCanvasX - 2) + 'px';
ca.style.top = 0;//(ca.resizing.originalCanvasY - 2) + 'px';
// Set the dimensions of the canvas using the HTML attributes
ca.width = parseInt(div.style.width);
ca.height = parseInt(div.style.height);
// Because resizing the canvas resets any tranformation - the antialias fix needs to be reapplied.
ca.getContext('2d').translate(0.5,0.5);
// Reset the gradient parsing status by setting all of the color values back to their original
// values before Draw was first called
var objects = RG.ObjectRegistry.getObjectsByCanvasID(ca.id);
for (var i=0,len=objects.length; i<len; i+=1) {
RG.resetColorsToOriginalValues(objects[i]);
if (typeof objects[i].reset === 'function') {
objects[i].reset();
}
}
// Kill the background cache
RG.cache = [];
// Fire the onresize event
RG.fireCustomEvent(ca.__object__, 'onresizebeforedraw');
RG.redrawCanvas(ca);
// Get rid of transparent semi-opaque DIV
ca.resizing.mousedown = false;
div.style.display = 'none';
document.body.removeChild(div);
}
// If there is zoom enabled in thumbnail mode, lose the zoom image
if (RG.Registry.Get('chart.zoomed.div') || RGraph.Registry.Get('chart.zoomed.img')) {
RG.Registry.Set('chart.zoomed.div', null);
RG.Registry.Set('chart.zoomed.img', null);
}
// Fire the onresize event
RG.FireCustomEvent(ca.__object__, 'onresizeend');
};
var window_onmouseup = MouseupFunc;
// Install the function as an event listener - but only once
if (typeof ca.rgraph_resize_window_mouseup_listener_installed != 'boolean') {
window.addEventListener('mouseup', window_onmouseup, false);
ca.rgraph_resize_window_mouseup_listener_installed = true;
}
var canvas_onmousemove = function (e)
{
e = RG.fixEventObject(e);
var coords = RG.getMouseXY(e);
var obj = e.target.__object__;
var ca = e.target;
var co = ca.getContext('2d');
var cursor = ca.style.cursor;
// Save the original cursor
if (!ca.resizing.original_cursor) {
ca.resizing.original_cursor = cursor;
}
if ( (coords[0] > (ca.width - resizeHandleSize)
&& coords[0] < ca.width
&& coords[1] > (ca.height - resizeHandleSize)
&& coords[1] < ca.height)) {
ca.style.cursor = 'move';
} else if ( coords[0] > (ca.width - resizeHandleSize - resizeHandleSize)
&& coords[0] < ca.width - resizeHandleSize
&& coords[1] > (ca.height - resizeHandleSize)
&& coords[1] < ca.height) {
ca.style.cursor = 'pointer';
} else {
if (ca.resizing.original_cursor) {
ca.style.cursor = ca.resizing.original_cursor;
ca.resizing.original_cursor = null;
} else {
ca.style.cursor = 'default';
}
}
};
// Install the function as an event listener - but only once
if (typeof ca.rgraph_resize_mousemove_listener_installed != 'boolean') {
ca.addEventListener('mousemove', canvas_onmousemove, false);
ca.rgraph_resize_mousemove_listener_installed = true;
}
var canvas_onmouseout = function (e)
{
e.target.style.cursor = 'default';
e.target.title = '';
};
// Install the function as an event listener - but only once
if (typeof ca.rgraph_resize_mouseout_listener_installed != 'boolean') {
ca.addEventListener('mouseout', canvas_onmouseout, false);
ca.rgraph_resize_mouseout_listener_installed = true;
}
var canvas_onmousedown = function (e)
{
e = RG.fixEventObject(e);
var coords = RG.getMouseXY(e);
var canvasXY = RG.getCanvasXY(e.target);
var ca = e.target;
/**
* Set the active variable to the last canvas that was clicked on
*/
active = ca;
if ( coords[0] > (ca.width - resizeHandleSize)
&& coords[0] < ca.width
&& coords[1] > (ca.height - resizeHandleSize)
&& coords[1] < ca.height) {
RG.fireCustomEvent(obj, 'onresizebegin');
// Save the existing border
if (ca.resizing.original_css_border == null) {
ca.resizing.original_css_border = ca.style.border;
}
// Save the existing shadow
if (ca.resizing.original_css_shadow == null) {
ca.resizing.original_css_shadow = ca.style.boxShadow;
}
ca.resizing.mousedown = true;
// Create the semi-opaque DIV
var div = document.createElement('DIV');
div.style.position = 'absolute';
div.style.left = canvasXY[0] + 'px';
div.style.top = canvasXY[1] + 'px';
div.style.width = ca.width + 'px';
div.style.height = ca.height + 'px';
div.style.border = '1px dotted black';
div.style.backgroundColor = 'gray';
div.style.opacity = 0.5;
div.__canvas__ = e.target;
document.body.appendChild(div);
ca.resizing.div = div;
ca.resizing.placeHolders.push(div);
// Hide the previous resize indicator layers. This is only necessary it seems for the Meter chart
for (var i=0; i<(ca.resizing.placeHolders.length - 1); ++i) {
ca.resizing.placeHolders[i].style.display = 'none';
}
// This is a repetition of the window.onmouseup function (No need to use DOM2 here)
div.onmouseup = function (e)
{
MouseupFunc(e);
}
// No need to use DOM2 here
ca.resizing.div.onmouseover = function (e)
{
e = RG.fixEventObject(e);
e.stopPropagation();
}
// The mouse
ca.resizing.originalx = e.pageX;
ca.resizing.originaly = e.pageY;
ca.resizing.originalCanvasX = RG.getCanvasXY(ca)[0];
ca.resizing.originalCanvasY = RG.getCanvasXY(ca)[1];
}
// This facilitates the reset button
if ( coords[0] > (ca.width - resizeHandleSize - resizeHandleSize)
&& coords[0] < ca.width - resizeHandleSize
&& coords[1] > (ca.height - resizeHandleSize)
&& coords[1] < ca.height
&& ca.resizing.originalw
&& ca.resizing.originaly) {
// Fire the onresizebegin event
RG.fireCustomEvent(ca.__object__, 'onresizebegin');
// Restore the original width and height
ca.width = ca.resizing.originalw;
ca.height = ca.resizing.originalh;
// TODO Need to check the parent is actually a DIV container or not?
// Show the link if it exists and the display is set to none
if (ca.__link__ && ca.__link__.style.display === 'none') {
ca.__link__.style.display = 'inline';
}
if (typeof ca.parentNode.id === 'string' && ca.parentNode.id.substring(0, 24) === 'rgraph_resize_container_') {
ca.parentNode.style.width = ca.resizing.originalw + 'px';
ca.parentNode.style.height = ca.resizing.originalh + 'px';
}
// Lose the border
ca.style.border = ca.resizing.original_css_border;
//Lose the shadow
ca.style.boxShadow = ca.resizing.original_css_shadow;
// 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';
// 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);