Here I will share with you an example of drawing with angularJS and canvas. The effect is very good, like it first.
The code copy is as follows:
<!DOCTYPE html>
<html ng-app="APP">
<head>
<meta charset="UTF-8">
<script src="http://cdn.bootcss.com/angular.js/1.3.0-beta.12/angular.min.js"></script>
</head>
<body ng-controller="MainCtrl">
<!--
This element of the interface will be replaced with the canvas element;
-->
<div ang:round:progress data-round-progress-model="roundProgressData"></div>
<br>
<input type="number" ng-model="roundProgressData.label"/>
<script>
//Cite the angular.directives-round-progress module;
var APP = angular.module('APP', ['angular.directives-round-progress']).
controller('MainCtrl', function($scope) {
$scope.roundProgressData = {
//This is the initialized data;
label: 11,
percentage: 0.11
}
//Re-draw the interface canvas by listening to the roundProgressData property under scope;
$scope.$watch('roundProgressData', function (newValue) {
newValue.percentage = newValue.label / 100;
}, true);
});
</script>
<script>
/*!
* AngularJS Round Progress Directive
*
* Copyright 2013 Stephane Begaudeau
* Released under the MIT license
*/
angular.module('angular.directives-round-progress', []).directive('angRoundProgress', [function () {
var compilationFunction = function (templateElement, templateAttributes, translate) {
if (templateElement.length === 1) {
//Initialize the DOM model, including initializing canvas, etc.;
var node = templateElement[0];
var width = node.getAttribute('data-round-progress-width') || '400';
var height = node.getAttribute('data-round-progress-height') || '400';
var canvas = document.createElement('canvas');
canvas.setAttribute('width', width);
canvas.setAttribute('height', height);
canvas.setAttribute('data-round-progress-model', node.getAttribute('data-round-progress-model'));
//Equivalent to demo, replacing the original element;
node.parentNode.replaceChild(canvas, node);
//A variety of configurations;
var outerCircleWidth = node.getAttribute('data-round-progress-outer-circle-width') || '20';
var innerCircleWidth = node.getAttribute('data-round-progress-inner-circle-width') || '5';
var outerCircleBackgroundColor = node.getAttribute('data-round-progress-outer-circle-background-color') || '#505769';
var outerCircleForegroundColor = node.getAttribute('data-round-progress-outer-circle-foreground-color') || '#12eeb9';
var innerCircleColor = node.getAttribute('data-round-progress-inner-circle-color') || '#505769';
var labelColor = node.getAttribute('data-round-progress-label-color') || '#12eeb9';
var outerCircleRadius = node.getAttribute('data-round-progress-outer-circle-radius') || '100';
var innerCircleRadius = node.getAttribute('data-round-progress-inner-circle-radius') || '70';
var labelFont = node.getAttribute('data-round-progress-label-font') || '50pt Calibri';
return {
pre: function preLink(scope, instanceElement, instanceAttributes, controller) {
var expression = canvas.getAttribute('data-round-progress-model');
//The monitoring model, O
//Just listen for an attribute;
scope.$watch(expression, function (newValue, oldValue) {
// Create the content of the canvas
//Including new creation and redrawing;
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, width, height);
// The "background" circle
var x = width / 2;
var y = height / 2;
ctx.beginPath();
ctx.arc(x, y, parseInt(outerCircleRadius), 0, Math.PI * 2, false);
ctx.lineWidth = parseInt(outerCircleWidth);
ctx.strokeStyle = outerCircleBackgroundColor;
ctx.stroke();
// The inner circle
ctx.beginPath();
ctx.arc(x, y, parseInt(innerCircleRadius), 0, Math.PI * 2, false);
ctx.lineWidth = parseInt(innerCircleWidth);
ctx.strokeStyle = innerCircleColor;
ctx.stroke();
// The inner number
ctx.font = labelFont;
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillStyle = labelColor;
ctx.fillText(newValue.label, x, y);
// The "foreground" circle
var startAngle = - (Math.PI / 2);
var endAngle = ((Math.PI * 2 ) * newValue.percentage) - (Math.PI / 2);
var anticlockwise = false;
ctx.beginPath();
ctx.arc(x, y, parseInt(outerCircleRadius), startAngle, endAngle, anticlockwise);
ctx.lineWidth = parseInt(outerCircleWidth);
ctx.strokeStyle = outerCircleForegroundColor;
ctx.stroke();
}, true);
},
post: function postLink(scope, instanceElement, instanceAttributes, controller) {}
};
}
};
var roundProgress = {
//In compile, operate on the dom first, and then listen on $socpe;
compile: compilationFunction,
replace: true
};
return roundProgress;
}]);
</script>
</body>
</html>
The above is the entire code of angularJS combined with canvas drawing examples. I hope everyone likes it.