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I have a 12h clock with 47 quarter areas (12h * 4 quarters in one hour). I want to show a point on a defined quarter area of the clock depending on the back-end's response. Assuming the back-end returns me 3, I have to show a point on the 3rd quarter area.
Here is a fiddle: jsfiddle
Here my approach:
All quarter areas in the SVG are in the group <g id="data"></g>. Each area has an id. After that I want to determine his SVG position and then put a point on that position:
function setPointForQuarterCoordonates(id) {
var quarterObject = document.getElementById(id);
var coordinates = quarterObject.getBoundingClientRect();
var point = document.createElementNS(NS, 'circle');
point.setAttributeNS(null, 'cx', coordinates.x);
point.setAttributeNS(null, 'cy', coordinates.y);
point.setAttributeNS(null, 'r', 10);
return point;
}
In my exemple, the button "Show Defined Point (3)" simulates this event by adding a point on the 3rd rectangle starting from 12:00. For that I used:
var quarterCoordinates = quarterObject.getBoundingClientRect();
But the problem is that this gives me the DOM coordinates, not the SVG ones. So if I resize the window and I click on the button 2nd time, the point is added at different position instead at the same.
Do you have any ideas or suggestions how to deal with that?
Try using .getBBox(); instead of getBoundingClientRect();.
function setPointForQuarterCoordonates(id) {
var quarterObject = document.getElementById(id);
var coordinates = quarterObject.getBBox(); // <------------------
var point = document.createElementNS(NS, 'circle');
point.setAttributeNS(null, 'cx', coordinates.x);
point.setAttributeNS(null, 'cy', coordinates.y);
point.setAttributeNS(null, 'r', 10);
return point;
}
https://developer.mozilla.org/en-US/docs/Web/API/SVGGraphicsElement/getBBox
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I wish there was a horizontal funnel plugin available in the market. I'm not a good js developer but I'm a designer with html/css skills in hand. I have designed similar funnel like below in psd but I couldn't find any plugin to plug in into the html. The funnel links should be dynamically adjusted too. Please suggest me how to build similar kind of funnel with steps title, conversion % on the second row in the funnel columns. I've also created this in css but css doesn't work because the funnel columns should be totally dynamic.
Here's how to draw your horizontal funnel chart for a given set of data using Canvas...
var canvas=document.getElementById("canvas");
var ctx=canvas.getContext("2d");
var cw=canvas.width;
var ch=canvas.height;
var height=100;
var baseY=200;
var ascending=35;
var descending=35;
var barheight=50;
var data=[65,14,4,3,3];
filledLineChart(data,height,baseY,descending,ascending,barheight,'gold')
function filledLineChart(data,height,baseY,descending,ascending,barheight,fillcolor){
var stepWidth=canvas.width/(data.length-1);
var maxDataValue=0;
for(var i=0;i<data.length;i++){
if(data[i]>maxDataValue){maxDataValue=data[i];}
}
ctx.beginPath();
ctx.moveTo(0,baseY-height*data[0]/maxDataValue);
for(var i=1;i<data.length;i++){
ctx.lineTo(stepWidth*i,baseY-height*data[i]/maxDataValue);
}
ctx.lineTo(stepWidth*(data.length-1),baseY);
ctx.lineTo(0,baseY);
ctx.fillStyle=fillcolor;
ctx.fill();
ctx.strokeStyle='lightgray';
ctx.strokeRect(0,baseY-height-ascending,canvas.width,height+descending+ascending);
ctx.strokeRect(0,baseY-height,canvas.width,height+descending);
ctx.beginPath();
for(var i=0;i<data.length;i++){
ctx.moveTo(i*stepWidth,baseY-height);
ctx.lineTo(i*stepWidth,baseY);
}
ctx.stroke();
ctx.fillStyle='whitesmoke';
ctx.fillRect(0,baseY-height-ascending-barheight,canvas.width,barheight);
}
<canvas id="canvas" width=300 height=300></canvas>
You can apply all your text like this:
// set a font and set a font color and draw some text
ctx.font='14px verdana';
ctx.fillStyle='black'; // or red or whatever
ctx.fillText('21.5%', 100, 175) // 100,175 are the x,y text position
I leave it to you to apply your various text values for the chart using this simple text method.
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Like our avatars: is it possible to create a simple avatar that i can use as placeholder for my users?
and extending that: how far can you go with the art preferences: colors, shape etc.
Link only answers are frowned upon but I think I'll take the risk: There are several libraries for those so called identicons Sampson linked to. The code there is Java (or looks very similar). A pure JavaScript implementation seems to be jdidenticon. You have more possibilities with PHP (you can use e.g.: ImageMagick and similar) but JavaScript is cheaper for your load ;-)
It is possible to create 2D and 3D graphics with javascript and the HTML5 tag canvas
<canvas><canvas>
Inside your javascript code you define what should painted inside your canvas
var context = document.getElementById("canvasId").getContext("2d");
var width = 125; // Triangle Width
var height = 105; // Triangle Height
var padding = 20;
// Draw a path
context.beginPath();
context.moveTo(padding + width/2, padding); // Top Corner
context.lineTo(padding + width, height + padding); // Bottom Right
context.lineTo(padding, height + padding); // Bottom Left
context.closePath();
// Fill the path
context.fillStyle = "#ffc821";
context.fill();
<canvas id="canvasId" width="165" height="145"></canvas>
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Check This ImageI want to Make a Circular Progress Bar for my Website.Which Change Its Starting Point With Button Click. For Example, When Button 1 Clicked It Should Rotate From 270 Degrees, When Button 2 Clicked It Should Rotate From 0 degree,When Button 3 clicked It Should Rotate From 90 degrees and When Button 4 Clicked It Should Start from 180 degrees.....
Please Help Me
Thanks In Advance..
Keep in mind first that this is not a clear answer, cause a right one would take me time of coding.
I recently used a open-source library from github. Here is the link.
https://github.com/kottenator/jquery-circle-progress
It is exactly what you want (with some modifications).
Here is the example. https://kottenator.github.io/jquery-circle-progress/
If you see the fourth progress circle, you see that you can set your own starting angle.
Let me here explain how can this achieve having Example four as my reference:
/*
* Example 4:
* - solid color fill
* - custom start angle
* - custom line cap
* - dynamic value set
*/
var c4 = $('.forth.circle');
c4.circleProgress({
startAngle: -Math.PI / 4 * 3,
value: 0.5,
lineCap: 'round',
fill: { color: '#ffa500' }
});
With StartAgle you can set the start value of the progress bar.
You can easy update your code to make the circle over and over again until the content you want load.
See the usage of the library here : https://github.com/kottenator/jquery-circle-progress#usage
See that answer too:
https://stackoverflow.com/a/13371976/4108694
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If I have a map in SVG format, how can I scale the image to be say, X times bigger? How would I achieve this? I want to be able to scale it based on an X variable which of course varies
I have looked into it but I am stretched for time. I just want to know where to begin.
To scale SVG data you need to use a scale transformation.
So to make an element, e.g 3 times bigger you would use:
var mySVG = document.getElementById("mySvgElement");
var scaleCoefficient = 3; //this will make it 3 times bigger in x/y direction
mySVG.setAttribute("transform", "scale(" + scaleCoefficient + "," + scaleCoefficient + ")");
That will apply a scale transformation of '3' in x/y directions thus making the element 3 times bigger without changing it's aspect ratio
SVG elements are defined by a transformation matrix - this is what vector shapes generally use to define translation/rotation/size without changing the actual SVG geometry data of the shapes themselves.
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I Want to have an image of a car, and when a user clicks a spot on the car, I drop an x image or a circle image on that spot. I need to save the spot where they clicked so when they come back I display it in the same spot.
What is the best way to do this in html?
Should I use an image with other images overlaid on top of it?
Should I use html5?
Anybody know of any working examples of a similar nature?
Want to use js, html5, etc to make this work on iphone safari (not native app). App is ruby on rails, so I could make use of some server side features, but would prefer to leverage as much in html/css if possible.
You can use a canvas element to do this. The canvas element allow you to draw images and shapes to it.
To store and retrieve clicks you can use Web Storage (localStorage).
For example - load the image and paint it to canvas:
ONLINE DEMO HERE
HTML:
<canvas id="demo" width="500" height="400"></canvas>
JavaScript:
/// get context for canvas, cache dimension
var ctx = demo.getContext('2d'),
w = demo.width,
h = demo.height,
img = new Image(); /// the image we want to load
/// when done go draw existing marks and start listening for clicks
img.onload = function() {
renderMarks();
demo.onclick = function(e) {
/// convert mouse coord relative to canvas
var rect = demo.getBoundingClientRect(),
x = e.clientX - rect.left,
y = e.clientY - rect.top;
/// store mark
addMark(x, y);
/// redraw everything
renderMarks();
}
}
These are the main functions, this first renders existing marks to canvas on top of the image:
function renderMarks() {
/// re-draw image which also serves to clear canvas
ctx.drawImage(img, 0, 0, w, h);
/// get existing marks from localStorage
var marks = localStorage.getItem('marks'),
i = 0;
/// if any, render them all
if (marks !== null) {
/// localStorage can only store strings
marks = JSON.parse(marks);
/// set color and line width of circle
ctx.strokeStyle = '#f00';
ctx.lineWidth = 3;
/// iterate marks and draw each one
for(;i < marks.length; i++) {
ctx.beginPath();
ctx.arc(marks[i][0], marks[i][1], 30, 0, 2 * Math.PI);
ctx.stroke();
}
}
}
This adds a mark to the collection:
function addMark(x, y) {
/// get existing marks or initialize
var marks = JSON.parse(localStorage.getItem('marks') || '[]');
/// add mark
marks.push([x, y]);
/// update storage
localStorage.setItem('marks', JSON.stringify(marks));
}
(The code can be optimized in various ways but I made it to show the basic principles).
If you now navigate away from the page and come back you will see the marks are rendered again (disclaimer: jsfiddle may or may not give the same page so test locally/in "real" page to be sure).
The circles here can be anything, an image, a different shape and so forth.
To clear the marks simply call:
localStorage.clear();
or if you store other data as well:
localStorage.removeItem('marks');
Well, you can create new images for each spot and when the user click you substitute the original image by the new one. You can do that using CSS or jQuery)
Depending if you are interested in showing areas or the exact x/y coordinates, an image <map> might be of use.
Also check out this stackoverflow question.
I have no working example to show, but I think this qualifies as similar in nature. I am not sure how you'd save the info for recalling state (coming back same session or days/months later?).
I hope this is of some use.