<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head >
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<link href="/css/fabric.master.css" rel="stylesheet" />
<link href="/css/fabric.freedrawing.css" rel="stylesheet" />
<script src="https://cdn.bootcss.com/fabric.js/3.6.2/fabric.min.js"></script>
<style>
#drawing-mode {
margin-bottom: 10px;
vertical-align: top;
}
#drawing-mode-options {
display: inline-block;
vertical-align: top;
margin-bottom: 10px;
margin-top: 10px;
background: #f5f2f0;
padding: 10px;
}
label {
display: inline-block;
width: 130px;
}
.info {
display: inline-block;
width: 25px;
background: #ffc;
}
#bd-wrapper {
min-width: 1500px;
}
</style>
</head>
<body>
<form id="form1">
<div id="bd-wrapper" ng-controller="CanvasControls">
<h2><span>Fabric.js demos</span> · Free drawing</h2>
<style>
#drawing-mode {
margin-bottom: 10px;
vertical-align: top;
}
#drawing-mode-options {
display: inline-block;
vertical-align: top;
margin-bottom: 10px;
margin-top: 10px;
background: #f5f2f0;
padding: 10px;
}
label {
display: inline-block;
width: 130px;
}
.info {
display: inline-block;
width: 25px;
background: #ffc;
}
#bd-wrapper {
min-width: 1500px;
}
</style>
<div style="display: block;">
<canvas id="c" height="750" width="1200" style="border: 1px solid #aaa;"></canvas>
</div>
<div style="display: inline-block; margin-left: 10px">
<input type="button" id="drawing-mode" class="btn" value="Cancel drawing mode"><br>
<input type="button" id="clear-canvas" class="btn" value="clear" />
<input type="button" id="saveJson" class="btn" value="保存为JSON文件" />
<div id="drawing-mode-options">
<label for="drawing-mode-selector">Mode:</label>
<select id="drawing-mode-selector">
<option>Pencil</option>
<option>Circle</option>
<option>Spray</option>
<option>Pattern</option>
<option>hline</option>
<option>vline</option>
<option>square</option>
<option>diamond</option>
<option>texture</option>
</select><br>
<label for="drawing-line-width">Line width:</label>
<span class="info">5</span><input type="range" value="5" min="0" max="150" id="drawing-line-width"><br>
<label for="drawing-color">Line color:</label>
<input type="color" value="#F0321E" id="drawing-color"><br>
<label for="drawing-shadow-color">Shadow color:</label>
<input type="color" value="#F0F096" id="drawing-shadow-color"><br>
<label for="drawing-shadow-width">Shadow width:</label>
<span class="info">10</span><input type="range" value="10" min="0" max="50" id="drawing-shadow-width"><br>
<label for="drawing-shadow-offset">Shadow offset:</label>
<span class="info">2</span><input type="range" value="2" min="0" max="50" id="drawing-shadow-offset"><br>
</div>
</div>
<br>
<br>
</div>
</form>
<script>
(function() {
var $ = function(id) { return document.getElementById(id) };
var canvas = this.__canvas = new fabric.Canvas('c', {
isDrawingMode: true
});
fabric.Object.prototype.transparentCorners = false;
var drawingModeEl = $('drawing-mode'),
drawingOptionsEl = $('drawing-mode-options'),
drawingColorEl = $('drawing-color'),
drawingShadowColorEl = $('drawing-shadow-color'),
drawingLineWidthEl = $('drawing-line-width'),
drawingShadowWidth = $('drawing-shadow-width'),
drawingShadowOffset = $('drawing-shadow-offset'),
clearEl = $('clear-canvas');
clearEl.onclick = function() { canvas.clear() };
$("saveJson").onclick = function() { alert(JSON.stringify(canvas.toJSON())); };
drawingModeEl.onclick = function() {
canvas.isDrawingMode = !canvas.isDrawingMode;
if (canvas.isDrawingMode) {
drawingModeEl.innerHTML = 'Cancel drawing mode';
drawingOptionsEl.style.display = '';
}
else {
drawingModeEl.innerHTML = 'Enter drawing mode';
drawingOptionsEl.style.display = 'none';
}
};
if (fabric.PatternBrush) {
var vLinePatternBrush = new fabric.PatternBrush(canvas);
vLinePatternBrush.getPatternSrc = function() {
var patternCanvas = fabric.document.createElement('canvas');
patternCanvas.width = patternCanvas.height = 10;
var ctx = patternCanvas.getContext('2d');
ctx.strokeStyle = this.color;
ctx.lineWidth = 5;
ctx.beginPath();
ctx.moveTo(0, 5);
ctx.lineTo(10, 5);
ctx.closePath();
ctx.stroke();
return patternCanvas;
};
var hLinePatternBrush = new fabric.PatternBrush(canvas);
hLinePatternBrush.getPatternSrc = function() {
var patternCanvas = fabric.document.createElement('canvas');
patternCanvas.width = patternCanvas.height = 10;
var ctx = patternCanvas.getContext('2d');
ctx.strokeStyle = this.color;
ctx.lineWidth = 5;
ctx.beginPath();
ctx.moveTo(5, 0);
ctx.lineTo(5, 10);
ctx.closePath();
ctx.stroke();
return patternCanvas;
};
var squarePatternBrush = new fabric.PatternBrush(canvas);
squarePatternBrush.getPatternSrc = function() {
var squareWidth = 10, squareDistance = 2;
var patternCanvas = fabric.document.createElement('canvas');
patternCanvas.width = patternCanvas.height = squareWidth + squareDistance;
var ctx = patternCanvas.getContext('2d');
ctx.fillStyle = this.color;
ctx.fillRect(0, 0, squareWidth, squareWidth);
return patternCanvas;
};
var diamondPatternBrush = new fabric.PatternBrush(canvas);
diamondPatternBrush.getPatternSrc = function() {
var squareWidth = 10, squareDistance = 5;
var patternCanvas = fabric.document.createElement('canvas');
var rect = new fabric.Rect({
width: squareWidth,
height: squareWidth,
angle: 45,
fill: this.color
});
var canvasWidth = rect.getBoundingRect().width;
patternCanvas.width = patternCanvas.height = canvasWidth + squareDistance;
rect.set({ left: canvasWidth / 2, top: canvasWidth / 2 });
var ctx = patternCanvas.getContext('2d');
rect.render(ctx);
return patternCanvas;
};
var img = new Image();
img.src = '/images/honey_im_subtle.png';
var texturePatternBrush = new fabric.PatternBrush(canvas);
texturePatternBrush.source = img;
}
$('drawing-mode-selector').onchange = function() {
if (this.value === 'hline') {
canvas.freeDrawingBrush = vLinePatternBrush;
}
else if (this.value === 'vline') {
canvas.freeDrawingBrush = hLinePatternBrush;
}
else if (this.value === 'square') {
canvas.freeDrawingBrush = squarePatternBrush;
}
else if (this.value === 'diamond') {
canvas.freeDrawingBrush = diamondPatternBrush;
}
else if (this.value === 'texture') {
canvas.freeDrawingBrush = texturePatternBrush;
}
else {
canvas.freeDrawingBrush = new fabric[this.value + 'Brush'](canvas);
}
if (canvas.freeDrawingBrush) {
canvas.freeDrawingBrush.color = drawingColorEl.value;
canvas.freeDrawingBrush.width = parseInt(drawingLineWidthEl.value, 10) || 1;
canvas.freeDrawingBrush.shadow = new fabric.Shadow({
blur: parseInt(drawingShadowWidth.value, 10) || 0,
offsetX: 0,
offsetY: 0,
affectStroke: true,
color: drawingShadowColorEl.value
});
}
};
drawingColorEl.onchange = function() {
canvas.freeDrawingBrush.color = this.value;
};
drawingShadowColorEl.onchange = function() {
canvas.freeDrawingBrush.shadow.color = this.value;
};
drawingLineWidthEl.onchange = function() {
canvas.freeDrawingBrush.width = parseInt(this.value, 10) || 1;
this.previousSibling.innerHTML = this.value;
};
drawingShadowWidth.onchange = function() {
canvas.freeDrawingBrush.shadow.blur = parseInt(this.value, 10) || 0;
this.previousSibling.innerHTML = this.value;
};
drawingShadowOffset.onchange = function() {
canvas.freeDrawingBrush.shadow.offsetX = parseInt(this.value, 10) || 0;
canvas.freeDrawingBrush.shadow.offsetY = parseInt(this.value, 10) || 0;
this.previousSibling.innerHTML = this.value;
};
if (canvas.freeDrawingBrush) {
canvas.freeDrawingBrush.color = drawingColorEl.value;
canvas.freeDrawingBrush.width = parseInt(drawingLineWidthEl.value, 10) || 1;
canvas.freeDrawingBrush.shadow = new fabric.Shadow({
blur: parseInt(drawingShadowWidth.value, 10) || 0,
offsetX: 0,
offsetY: 0,
affectStroke: true,
color: drawingShadowColorEl.value
});
}
})();
</script>
</body>
</html>
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