[英]kineticjs - How to get points from a line
如果我創建一條線...
var line = new Kinetic.Line({
points: [0 , 5, 0, 100],
stroke: 'black',
strokeWidth: 2,
draggable: true
});
我附上了一個事件...
line.on("mouseup", function () {
updateLineInput( this.attrs.points );
});
怎么才能把積分拿回來? this.attrs.points
不起作用...
您可以使用line.getPoints()
獲取點,但它們通常在拖放后不會改變,X、Y 坐標會改變,相對點是從中繪制的。 您可以使用line.getX()
和line.getY()
獲得它們
//It would be better to use the 'dragend' event if you want it to fire on a drag/drop
line.on('dragend', function() {
//You may really want the coordinates too
var x = line.getX();
var y = line.getY();
//But this is what you asked for:
var points = line.getPoints();
updateLineInput(points);
});
我同意 nak 但我建議:
//It would be better to use the 'dragend' event if you want it to fire on a drag/drop
line.on('dragend', function(evt) {
var myline=evt.shape;
//You may really want the coordinates too
var x = myline.getX();
var y = myline.getY();
//But this is what you asked for:
var points = myline.getPoints();
var mynewpoints=manipulate(points);
myline.setPoints(mynewpoints);
var mylayer=myline.getLayer();
mylayer.draw();
});
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