我是 HTML5 新手。我必须实现这样的功能,即我希望将图像从外部拖放到画布中,然后画布内有可见的边界,并且图像可以从一个边界移动到另一个边界。与以下链接相同, http://custom.case-mate.com/diy?bypassLandingPage =true
因为,在站点中,用户选择模式并将图像拖入其中。然后他可以在边界之间拖动图像。请提供一些解决方案来实现这样的功能。
这是我尝试过的,
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
}
canvas {position:relative;
left:150%;
border: 10px solid #9C9898;
background-color: grey;
}
</style>
<script src="http://www.html5canvastutorials.com/libraries/kinetic-v3.10.0.js"></script>
<script>
window.onload = function() {
var stage = new Kinetic.Stage({
container: "container",
width: 300,
height: 400,
});
var layer = new Kinetic.Layer();
var redLine = new Kinetic.Line({
points: [150, 0, 150, 400],
stroke: "white",
strokeWidth: 2,
});
var blueLine = new Kinetic.Line({
points: [150, 0, 150, 120, 300, 120],
stroke: "white",
strokeWidth: 2,
});
var thirdLine = new Kinetic.Line({
points: [300, 120, 150, 120, 150, 400],
stroke: "white",
strokeWidth: 2,
});
var imageObj = new Image();
imageObj.onload = function() {
var image = new Kinetic.Image({
x: stage.getWidth() / 2 - 50,
y: stage.getHeight() / 2 - 60,
image: imageObj,
width: 100,
height: 120,
});
image.draggable(true);
layer.add(image);
// add the layer to the stage
stage.add(layer);
};
imageObj.src = "images/212.png";
layer.add(redLine);
layer.add(blueLine);
layer.add(thirdLine);
stage.add(layer);
};
</script>
</head>
<body>
<div id="container"></div>
</body>
</html>