抱歉,如果这个问题已经被问过,我试图找到它,但找不到。
我有一个画布,最终应该显示大约 400-500 个 20-30 像素高度/宽度的矩形。它们中的每一个都应该在鼠标上方和鼠标移出时向左和向上移动一个像素,以创建某种选定的行为。现在,我的代码适用于少量形状,但对于其中的 500 个形状,它开始显着减慢。从互联网上的一些示例中,我看到我可以创建“动画层”并将我需要动画的对象移动到那里。但是,这仍然需要我重新绘制主层以从之前的位置删除移动的项目......这是代码:
var seatMap = {};
seatMap.seatTypes = {
economy: {
width: 20,
height: 20,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
cornerRadius: 5
},
business: {
width: 22,
height: 22,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
cornerRadius: 5
},
first: {
width: 25,
height: 25,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
cornerRadius: 5
}
};
seatMap.Map = function (params) {
var stage = new Kinetic.Stage({
container: params.container,
width: params.width,
height: params.height
});
var mainLayer = new Kinetic.Layer();
var animationLayer = new Kinetic.Layer();
stage.add(mainLayer);
stage.add(animationLayer);
var addSeat = function (object) {
object.seat.mainLayerRef = mainLayer;
object.seat.animationLayerRef = animationLayer;
mainLayer.add(object.seat);
};
var refresh = function () {
mainLayer.draw();
}
return {
refresh: refresh,
addSeat: addSeat
}
}
seatMap.Seat = function (params) {
var seatType = params.seatType == null ? seatMap.seatTypes.economy : params.seatType;
var seat = new Kinetic.Rect({
width: seatType.width,
height: seatType.height,
x: params.x,
y: params.y,
fill: seatType.fill,
stroke: seatType.stroke,
strokewidth: seatType.strokewidth,
cornerRadius: seatType.cornerRadius,
listening: true
});
seat.staticXPosition = params.x;
seat.staticYPosition = params.y;
seat.on('mouseover', function (event) {
event.shape.moveTo(event.shape.animationLayerRef);
event.shape.setX(event.shape.staticXPosition - 2);
event.shape.setY(event.shape.staticYPosition - 2);
event.shape.animationLayerRef.draw();
event.shape.mainLayerRef.draw();
});
seat.on('mouseout', function (event) {
event.shape.setX(event.shape.staticXPosition);
event.shape.setY(event.shape.staticYPosition);
event.shape.moveTo(event.shape.mainLayerRef);
event.shape.animationLayerRef.draw();
event.shape.mainLayerRef.draw();
});
return {
seat: seat,
}
}
以及呈现画布的代码:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="scripts/jquery-1.8.0.js"></script>
<script type="text/javascript" src="scripts/kinetic-v3.10.5.min.js"></script>
<script type="text/javascript" src="scripts/local/seatMapKineticExtender.js"></script>
<!--<script type="text/javascript" src="scripts/local/app.js"></script>-->
<script>
$(function () {
var map = new seatMap.Map({
container: 'stage',
width: 1000,
height: 420
});
for (var i = 0; i < 800; i += 30) {
for (var j = 0; j < 500; j+=30) {
var seat = new seatMap.Seat({
seatType: seatMap.seatTypes.business,
x: i,
y: j
});
map.addSeat(seat);
}
}
//var seat = new seatMap.Seat({
// seatType: seatMap.seatTypes.business,
// x: 200,
// y: 200
//});
//map.addSeat(seat);
map.refresh();
});
</script>
</head>
<body>
<div id="stage" style="width: 1000px; height: 420px; margin: 0 auto; border: 1px solid black; position: relative">
<div style="position: absolute; top: 0; z-index: 1000">
<button id="zoomIn" type="button">Zoom In</button>
<button id="zoomOut" type="button">Zoom Out</button>
</div>
</div>
</body>
</html>
我觉得我在这里做的很不对,但是,不幸的是我对 kineticjs 还不够熟悉。谁能指出我正确的方向?
在此先感谢,丹尼