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很久以前我做了一个jsfiddle来演示如何放大到中心(http://jsfiddle.net/Y69nm/1/)。现在我想缩放到给定的点(光标),就像googleMap一样,但不知道该怎么做。我将实际的鼠标坐标发送到用于缩放的功能。RaphaelJs ViewBox放大到点
这里是小提琴: http://jsfiddle.net/Y69nm/3/
这里是缩放功能:
function handle(delta, mousex, mousey) {
if (delta < 0) {
viewBoxWidth *= 0.95;
viewBoxHeight *= 0.95;
} else {
viewBoxWidth *= 1.05;
viewBoxHeight *= 1.05;
}
scale = paper.width/viewBoxWidth ;
console.log(scale);
// zoom to center
x = (paper.width/2) - (viewBoxWidth/2);
y = (paper.height/2) - (viewBoxHeight/2);
// i try to zoom to mouse cursor
var moveX = (mousex - (mousex * scale));
var moveY = (mousey - (mousey * scale));
x = 0 - moveX;
y = 0 - moveY;
paper.setViewBox(x, y, viewBoxWidth, viewBoxHeight);
}