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marking qr code as downloadable image #35

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6 changes: 6 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,12 @@ Size in pixels
#### image
- If you want to render qr code into image element set this attribute to `true`.

#### download
- Mark an image as downloadable

#### fileName
- Name of downloaded image

# Contributing

Contributions are welcome. Please make a pull request against canary branch, use [Git Commit Message Conventions](https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#heading=h.uyo6cb12dt6w) and do not bump versions. Also include tests.
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33 changes: 24 additions & 9 deletions src/angular-qr.js
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,10 @@

return $scope.checkInputMode(inputMode, text) ? inputMode : '';
};

$scope.getFileName = function() {
return $scope.fileName || 'qrcode.png';
};
}])
.directive('qr', ['$timeout', '$window', function($timeout, $window){

Expand All @@ -84,7 +88,8 @@
inputMode: '=',
size: '=',
text: '=',
image: '='
image: '=',
fileName: '='
},
controller: 'QrCtrl',
link: function postlink(scope, element, attrs){
Expand All @@ -93,15 +98,19 @@
throw new Error('The `text` attribute is required.');
}

var canvas = element.find('canvas')[0];
var $canvas = element.find('canvas');
var canvas = $canvas[0];
var canvas2D = !!$window.CanvasRenderingContext2D;

var link = 'download' in attrs ? document.createElement('a') : '';

scope.TYPE_NUMBER = scope.getTypeNumeber();
scope.TEXT = scope.getText();
scope.CORRECTION = scope.getCorrection();
scope.SIZE = scope.getSize();
scope.INPUT_MODE = scope.getInputMode(scope.TEXT);
scope.canvasImage = '';
scope.FILE_NAME = scope.getFileName();

var draw = function(context, qr, modules, tile){
for (var row = 0; row < modules; row++) {
Expand All @@ -114,7 +123,7 @@
}
};

var render = function(canvas, value, typeNumber, correction, size, inputMode){
var render = function(canvas, value, typeNumber, correction, size, inputMode, fileName){
var trim = /^\s+|\s+$/g;
var text = value.replace(trim, '');

Expand All @@ -132,44 +141,50 @@
draw(context, qr, modules, tile);
scope.canvasImage = canvas.toDataURL() || '';
}

if (link) {
link.download = fileName;
link.href = canvas.toDataURL() || '';
element.wrap(link);
}
};

render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);

$timeout(function(){
scope.$watch('text', function(value, old){
if (value !== old) {
scope.TEXT = scope.getText();
scope.INPUT_MODE = scope.getInputMode(scope.TEXT);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);
}
});

scope.$watch('correctionLevel', function(value, old){
if (value !== old) {
scope.CORRECTION = scope.getCorrection();
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);
}
});

scope.$watch('typeNumber', function(value, old){
if (value !== old) {
scope.TYPE_NUMBER = scope.getTypeNumeber();
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);
}
});

scope.$watch('size', function(value, old){
if (value !== old) {
scope.SIZE = scope.getSize();
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);
}
});

scope.$watch('inputMode', function(value, old){
if (value !== old) {
scope.INPUT_MODE = scope.getInputMode(scope.TEXT);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE);
render(canvas, scope.TEXT, scope.TYPE_NUMBER, scope.CORRECTION, scope.SIZE, scope.INPUT_MODE, scope.FILE_NAME);
}
});
});
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