node-red-contrib-smartnode-hook
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this project is dependenced by the node-red-contrib-smartnode for some IoT display function
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JavaScript
// version: 2014-11-15
/**
* 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 Creative Commons BY-NC license. That means |
* | that for non-commercial purposes it's free to use and for business use there's |
* | a 99 GBP per-company fee to pay. You can read the full license here: |
* | |
* | http://www.rgraph.net/license |
* o--------------------------------------------------------------------------------o
*/
/**
* Having this here means that the RGraph libraries can be included in any order, instead of you having
* to include the common core library first.
*/
// Define the RGraph global variable
RGraph = window.RGraph || {isRGraph: true};
RGraph.Drawing = RGraph.Drawing || {};
/**
* The constructor. This function sets up the object. It takes the ID (the HTML attribute) of the canvas as the
* first argument and the Y coordinate of the axes as the second
*
* @param string id The canvas tag ID
* @param number y The Y coordinate
*/
RGraph.Drawing.XAxis = function (conf)
{
/**
* Allow for object config style
*/
if ( typeof conf === 'object'
&& typeof conf.y === 'number'
&& typeof conf.id === 'string') {
var id = conf.id
var y = conf.y;
var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)
} else {
var id = conf;
var y = arguments[1];
}
this.id = id;
this.canvas = document.getElementById(this.id);
this.context = this.canvas.getContext('2d');
this.canvas.__object__ = this;
this.y = y;
this.coords = [];
this.coordsText = [];
this.original_colors = [];
this.firstDraw = true; // After the first draw this will be false
/**
* This defines the type of this shape
*/
this.type = 'drawing.xaxis';
/**
* This facilitates easy object identification, and should always be true
*/
this.isRGraph = true;
/**
* This adds a uid to the object that you can use for identification purposes
*/
this.uid = RGraph.CreateUID();
/**
* This adds a UID to the canvas for identification purposes
*/
this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
/**
* Some example background properties
*/
this.properties =
{
'chart.gutter.left': 25,
'chart.gutter.right': 25,
'chart.labels': null,
'chart.labels.position': 'section',
'chart.colors': ['black'],
'chart.title.color': null, // Defaults to same as chart.colors
'chart.text.color': null, // Defaults to same as chart.colors
'chart.text.font': 'Arial',
'chart.text.size': 10,
'chart.align': 'bottom',
'chart.numlabels': 5,
'chart.scale.visible': true,
'chart.scale.formatter': null,
'chart.scale.decimals': 0,
'chart.scale.invert': false,
'chart.scale.zerostart': true,
'chart.units.pre': '',
'chart.units.post': '',
'chart.title': '',
'chart.numticks': null,
'chart.hmargin': 0,
'chart.linewidth': 1,
'chart.noendtick.left': false,
'chart.noendtick.right': false,
'chart.noxaxis': false,
'chart.max': null,
'chart.min': 0,
'chart.tooltips': null,
'chart.tooltips.effect': 'fade',
'chart.tooltips.css.class':'RGraph_tooltip',
'chart.tooltips.event': 'onclick',
'chart.events.click': null,
'chart.events.mousemove': null,
'chart.xaxispos': 'bottom',
'chart.yaxispos': 'left'
}
/**
* A simple check that the browser has canvas support
*/
if (!this.canvas) {
alert('[DRAWING.XAXIS] No canvas support');
return;
}
/**
* Create the dollar object so that functions can be added to them
*/
this.$0 = {};
/**
* Translate half a pixel for antialiasing purposes - but only if it hasn't beeen
* done already
*/
if (!this.canvas.__rgraph_aa_translated__) {
this.context.translate(0.5,0.5);
this.canvas.__rgraph_aa_translated__ = true;
}
var RG = RGraph;
var ca = this.canvas;
var co = ca.getContext('2d');
var prop = this.properties;
var jq = jQuery;
var pa = RG.Path;
var win = window;
var doc = document;
var ma = Math;
/**
* "Decorate" the object with the generic effects if the effects library has been included
*/
if (RG.Effects && typeof RG.Effects.decorate === 'function') {
RG.Effects.decorate(this);
}
/**
* A setter method for setting graph properties. It can be used like this: obj.Set('chart.strokestyle', '#666');
*
* @param name string The name of the property to set
* @param value mixed The value of the property
*/
this.set =
this.Set = function (name)
{
var value = typeof arguments[1] === 'undefined' ? null : arguments[1];
/**
* the number of arguments is only one and it's an
* object - parse it for configuration data and return.
*/
if (arguments.length === 1 && typeof name === 'object') {
RG.parseObjectStyleConfig(this, name);
return this;
}
name = name.toLowerCase();
/**
* This should be done first - prepend the property name with "chart." if necessary
*/
if (name.substr(0,6) != 'chart.') {
name = 'chart.' + name;
}
/**
* Make the tickmarks align if labels are specified
*/
if (name == 'chart.labels' && !prop['chart.numxticks']) {
prop['chart.numxticks'] = value.length;
}
prop[name] = value;
return this;
};
/**
* A getter method for retrieving graph properties. It can be used like this: obj.Get('chart.strokestyle');
*
* @param name string The name of the property to get
*/
this.get =
this.Get = function (name)
{
/**
* This should be done first - prepend the property name with "chart." if necessary
*/
if (name.substr(0,6) != 'chart.') {
name = 'chart.' + name;
}
return prop[name.toLowerCase()];
};
/**
* Draws the rectangle
*/
this.draw =
this.Draw = function ()
{
/**
* Fire the onbeforedraw event
*/
RG.FireCustomEvent(this, 'onbeforedraw');
/**
* Stop this growing uncntrollably
*/
this.coordsText = [];
/**
* Some defaults
*/
this.gutterLeft = prop['chart.gutter.left'];
this.gutterRight = prop['chart.gutter.right'];
if (!prop['chart.text.color']) prop['chart.text.color'] = prop['chart.colors'][0];
if (!prop['chart.title.color']) prop['chart.title.color'] = prop['chart.colors'][0];
/**
* Parse the colors. This allows for simple gradient syntax
*/
if (!this.colorsParsed) {
this.parseColors();
// Don't want to do this again
this.colorsParsed = true;
}
// DRAW X AXIS HERE
this.DrawXAxis();
/**
* This installs the event listeners
*/
RG.InstallEventListeners(this);
/**
* Fire the onfirstdraw event
*/
if (this.firstDraw) {
RG.fireCustomEvent(this, 'onfirstdraw');
this.firstDraw = false;
this.firstDrawFunc();
}
/**
* Fire the ondraw event
*/
RG.FireCustomEvent(this, 'ondraw');
return this;
};
/**
* The getObjectByXY() worker method
*/
this.getObjectByXY = function (e)
{
if (this.getShape(e)) {
return this;
}
};
/**
* Not used by the class during creating the graph, but is used by event handlers
* to get the coordinates (if any) of the selected shape
*
* @param object e The event object
*/
this.getShape = function (e)
{
var mouseXY = RG.getMouseXY(e);
var mouseX = mouseXY[0];
var mouseY = mouseXY[1];
if ( mouseX >= this.gutterLeft
&& mouseX <= (ca.width - this.gutterRight)
&& mouseY >= this.y - (prop['chart.align'] == 'top' ? (prop['chart.text.size'] * 1.5) + 5 : 0)
&& mouseY <= (this.y + (prop['chart.align'] == 'top' ? 0 : (prop['chart.text.size'] * 1.5) + 5))
) {
var x = this.gutterLeft;
var y = this.y;
var w = ca.width - this.gutterLeft - this.gutterRight;
var h = 15;
return {
0: this, 1: x, 2: y, 3: w, 4: h, 5: 0,
'object': this, 'x': x, 'y': y, 'width': w, 'height': h, 'index': 0, 'tooltip': prop['chart.tooltips'] ? prop['chart.tooltips'][0] : null
};
}
return null;
};
/**
* This function positions a tooltip when it is displayed
*
* @param obj object The chart object
* @param int x The X coordinate specified for the tooltip
* @param int y The Y coordinate specified for the tooltip
* @param objec tooltip The tooltips DIV element
*/
this.positionTooltip = function (obj, x, y, tooltip, idx)
{
var coordX = obj.gutterLeft;
var coordY = obj.y;
var coordW = ca.width - obj.gutterLeft - obj.gutterRight;
var coordH = prop['chart.text.size'] * 1.5;
var canvasXY = RG.getCanvasXY(ca);
var width = tooltip.offsetWidth;
var height = tooltip.offsetHeight;
// Set the top position
tooltip.style.left = 0;
tooltip.style.top = canvasXY[1] + this.y - height - 5 + (prop['chart.align'] == 'top' ? ((prop['chart.text.size'] * 1.5) / 2) * -1 : ((prop['chart.text.size'] * 1.5) / 2)) + 'px';
// By default any overflow is hidden
tooltip.style.overflow = '';
// The arrow
var img = new Image();
img.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAFCAYAAACjKgd3AAAARUlEQVQYV2NkQAN79+797+RkhC4M5+/bd47B2dmZEVkBCgcmgcsgbAaA9GA1BCSBbhAuA/AagmwQPgMIGgIzCD0M0AMMAEFVIAa6UQgcAAAAAElFTkSuQmCC';
img.style.position = 'absolute';
img.id = '__rgraph_tooltip_pointer__';
img.style.top = (tooltip.offsetHeight - 2) + 'px';
tooltip.appendChild(img);
// Reposition the tooltip if at the edges:
// LEFT edge
if ((canvasXY[0] + coordX + (coordW / 2) - (width / 2)) < 10) {
tooltip.style.left = (canvasXY[0] + coordX - (width * 0.1)) + (coordW / 2) + 'px';
img.style.left = ((width * 0.1) - 8.5) + 'px';
// RIGHT edge
} else if ((canvasXY[0] + coordX + (coordW / 2) + (width / 2)) > (doc.body.offsetWidth - 10) ) {
tooltip.style.left = canvasXY[0] + coordX - (width * 0.9) + (coordW / 2) + 'px';
img.style.left = ((width * 0.9) - 8.5) + 'px';
// Default positioning - CENTERED
} else {
tooltip.style.left = (canvasXY[0] + coordX + (coordW / 2) - (width * 0.5)) + 'px';
img.style.left = ((width * 0.5) - 8.5) + 'px';
}
};
/**
* Each object type has its own Highlight() function which highlights the appropriate shape
*
* @param object shape The shape to highlight
*/
this.highlight =
this.Highlight = function (shape)
{
// When showing tooltips, this method can be used to highlight the X axis
};
/**
* This allows for easy specification of gradients
*/
this.parseColors = function ()
{
// Save the original colors so that they can be restored when the canvas is reset
if (this.original_colors.length === 0) {
this.original_colors['chart.colors'] = RG.array_clone(prop['chart.colors']);
}
/**
* Parse various properties for colors
*/
//this.properties['chart.title.color'] = this.parseSingleColorForGradient(this.properties['chart.title.color']);
//this.properties['chart.text.color'] = this.parseSingleColorForGradient(this.properties['chart.text.color']);
prop['chart.colors'][0] = this.parseSingleColorForGradient(prop['chart.colors'][0]);
};
/**
* Use this function to reset the object to the post-constructor state. Eg reset colors if
* need be etc
*/
this.reset = function ()
{
};
/**
* This parses a single color value
*/
this.parseSingleColorForGradient = function (color)
{
if (!color) {
return color;
}
if (typeof color === 'string' && color.match(/^gradient\((.*)\)$/i)) {
var parts = RegExp.$1.split(':');
// Create the gradient
var grad = co.createLinearGradient(prop['chart.gutter.left'],0,ca.width - prop['chart.gutter.right'],0);
var diff = 1 / (parts.length - 1);
grad.addColorStop(0, RG.trim(parts[0]));
for (var j=1,len=parts.length; j<len; ++j) {
grad.addColorStop(j * diff, RG.trim(parts[j]));
}
}
return grad ? grad : color;
};
/**
* The function that draws the X axis
*/
this.drawXAxis =
this.DrawXAxis = function ()
{
var gutterLeft = prop['chart.gutter.left'];
var gutterRight = prop['chart.gutter.right'];
var x = this.gutterLeft;
var y = this.y;
var min = prop['chart.min'];
var max = prop['chart.max'];
var labels = prop['chart.labels'];
var labels_position = prop['chart.labels.position'];
var color = prop['chart.colors'][0];
var title_color = prop['chart.title.color'];
var label_color = prop['chart.text.color'];
var width = ca.width - this.gutterLeft - this.gutterRight;
var font = prop['chart.text.font'];
var size = prop['chart.text.size'];
var align = prop['chart.align'];
var numlabels = prop['chart.numlabels'];
var formatter = prop['chart.scale.formatter'];
var decimals = Number(prop['chart.scale.decimals']);
var invert = prop['chart.scale.invert'];
var scale_visible = prop['chart.scale.visible'];
var units_pre = prop['chart.units.pre'];
var units_post = prop['chart.units.post'];
var title = prop['chart.title'];
var numticks = prop['chart.numticks'];
var hmargin = prop['chart.hmargin'];
var linewidth = prop['chart.linewidth'];
var noleftendtick = prop['chart.noendtick.left'];
var norightendtick = prop['chart.noendtick.right'];
var noxaxis = prop['chart.noxaxis'];
var xaxispos = prop['chart.xaxispos'];
var yaxispos = prop['chart.yaxispos'];
if (RG.is_null(numticks)) {
if (labels && labels.length) {
numticks = labels.length;
} else if (!labels && max != 0) {
numticks = 10;
} else {
numticks = numlabels;
}
}
/**
* Set the linewidth
*/
co.lineWidth = linewidth + 0.001;
/**
* Set the color
*/
co.strokeStyle = color;
if (!noxaxis) {
/**
* Draw the main horizontal line
*/
pa(co, ['b','m',x, Math.round(y),'l',x + width, Math.round(y),'s',co.strokeStyle]);
/**
* Draw the axis tickmarks
*/
co.beginPath();
for (var i=(noleftendtick ? 1 : 0); i<=(numticks - (norightendtick ? 1 : 0)); ++i) {
co.moveTo(Math.round(x + ((width / numticks) * i)), xaxispos == 'center' ? (align == 'bottom' ? y - 3 : y + 3) : y);
co.lineTo(Math.round(x + ((width / numticks) * i)), y + (align == 'bottom' ? 3 : -3));
}
co.stroke();
}
/**
* Draw the labels
*/
co.fillStyle = label_color;
if (labels) {
/**
* Draw the labels
*/
numlabels = labels.length;
var h = 0;
var l = 0;
var single_line = RG.MeasureText('Mg', false, font, size);
// Measure the maximum height
for (var i=0,len=labels.length; i<len; ++i) {
var dimensions = RG.MeasureText(labels[i], false, font, size);
var h = Math.max(h, dimensions[1]);
var l = Math.max(l, labels[i].split('\r\n').length);
}
for (var i=0,len=labels.length; i<len; ++i) {
RG.Text2(this,{'font': font,
'size': size,
'x': labels_position == 'edge' ? ((((width - hmargin - hmargin) / (labels.length - 1)) * i) + gutterLeft + hmargin) : ((((width - hmargin - hmargin) / labels.length) * i) + ((width / labels.length) / 2) + gutterLeft + hmargin),
'y':align == 'bottom' ? y + 3 : y - 3 - h + single_line[1],
'text':String(labels[i]),
'valign': align == 'bottom' ? 'top' : 'bottom',
'halign':'center',
'tag': 'labels'
});
}
/**
* No specific labels - draw a scale
*/
} else if (scale_visible){
if (max === null) {
alert('[DRAWING.XAXIS] If not specifying axis.labels you must specify axis.max!');
}
// yaxispos
if (yaxispos == 'center') {
width /= 2;
var additionalX = width;
} else {
var additionalX = 0;
}
for (var i=0; i<=numlabels; ++i) {
// Don't show zero if the chart.scale.zerostart option is false
if (i == 0 && !prop['chart.scale.zerostart']) {
continue;
}
var original = (((max - min) / numlabels) * i) + min;
var hmargin = prop['chart.hmargin'];
var text = String(typeof(formatter) == 'function' ? formatter(this, original) : RG.number_format(this, original.toFixed(decimals), units_pre, units_post));
if (invert) {
var x = ((width - hmargin - ((width - hmargin - hmargin) / numlabels) * i)) + gutterLeft + additionalX;
} else {
var x = (((width - hmargin - hmargin) / numlabels) * i) + gutterLeft + hmargin + additionalX;
}
RG.Text2(this,{'font': font,
'size': size,
'x': x,
'y': align == 'bottom' ? y + 3 : y - 3,
'text':text,
'valign':align == 'bottom' ? 'top' : 'bottom',
'halign':'center',
'tag': 'scale'
});
}
/**
* If the Y axis is in the center - this draws the left half of the labels
*/
if (yaxispos == 'center') {
for (var i=0; i<numlabels; ++i) {
var original = (((max - min) / numlabels) * (numlabels - i)) + min;
var hmargin = prop['chart.hmargin'];
var text = String(typeof(formatter) == 'function' ? formatter(this, original) : RG.number_format(this, original.toFixed(decimals), units_pre, units_post));
if (invert) {
var x = ((width - hmargin - ((width - hmargin - hmargin) / numlabels) * i)) + gutterLeft;
} else {
var x = (((width - hmargin - hmargin) / numlabels) * i) + gutterLeft + hmargin;
}
RG.Text2(this, {'font':font,
'size':size,
'x':x,
'y':align == 'bottom' ? y + size + 2 : y - size - 2,'text':'-' + text,
'valign':'center',
'halign':'center',
'tag': 'scale'
});
}
}
}
/**
* Draw the title for the axes
*/
if (title) {
var dimensions = RG.MeasureText(title, false, font, size + 2);
co.fillStyle = title_color
RG.Text2(this,{'font': font,
'size': size + 2,
'x': (ca.width - this.gutterLeft - this.gutterRight) / 2 + this.gutterLeft,
'y': align == 'bottom' ? y + dimensions[1] + 10 : y - dimensions[1] - 10,
'text': title,
'valign': 'center',
'halign':'center',
'tag': 'title'
});
}
};
/**
* Using a function to add events makes it easier to facilitate method chaining
*
* @param string type The type of even to add
* @param function func
*/
this.on = function (type, func)
{
if (type.substr(0,2) !== 'on') {
type = 'on' + type;
}
this[type] = func;
return this;
};
/**
* This function runs once only
* (put at the end of the file (before any effects))
*/
this.firstDrawFunc = function ()
{
};
/**
* Objects are now always registered so that the chart is redrawn if need be.
*/
RG.Register(this);
/**
* This is the 'end' of the constructor so if the first argument
* contains configuration data - handle that.
*/
if (parseConfObjectForOptions) {
RG.parseObjectStyleConfig(this, conf.options);
}
};