即使mouse:out
事件发生后,如何使对画布对象(矩形)的选择始终处于活动状态?我已经尝试过使用subTargetCheck:true
属性;但是此属性无法满足上述要求。
this.fabricObject = new fabric.Rect({
left: this.objectSize.left,
top: this.objectSize.top,
width: this.objectSize.width,
height: this.objectSize.height,
fill: '#ccc',
padding: 10,
subTargetCheck: true
});
this.canvas.add(this.fabricObject);
this.fabricObject.center().setCoords();
this.canvas.renderAll();
=>设置的代码始终有效
this.canvas.on('mouse:down', (e) => {
console.log(e.target)
this.canvas.getObjects().map((object:any) => {
object.set('active', true);
this.canvas.renderAll();
})
});
=>如果我这样做是为了进行颜色填充,则在发生鼠标移出事件时效果很好。
this.canvas.on('mouse:down', (e) => {
console.log(e.target)
this.canvas.getObjects().map((object:any) => {
object.set('fill', 'green');
this.canvas.renderAll();
})
});
REF:https://jsfiddle.net/jasie/r3fqu4p6/12/
就像在jsfiddle中一样,当点击正方形时,它将变为活动状态;当点击正方形的一侧时,将被禁用...因此,我也希望在单击该正方形之外时也处于活动状态。
您需要使用canvas.setActiveObject()
手动在画布上设置活动对象。
var canvas = new fabric.Canvas("canvas");
var ourRect = new fabric.Rect({
left: 100,
top: 100,
width: 75,
height: 50,
fill: "green",
padding: 10,
subTargetCheck: true
});
canvas.add(ourRect);
canvas.on("mouse:down", object => {
canvas.setActiveObject(ourRect);
});
请检查此CodeSansbox演示:https://codesandbox.io/s/stackoverflow-60522500-fabric-js-1720-ekocp