fabricjs如何在组元素上保持固定大小而其他元素缩放? [英] fabricjs How can i keep fixed size on group elements while others scaling?
问题描述
Hello 我使用fabricjs来播放html画布。
我创建画布,然后在其上添加一组对象。
Hello I use fabricjs to play with the html canvas. I create the canvas and i add group of objects on it.
在一组对象上,我需要保持固定的宽度和宽度。我缩放对象时某些对象的高度。
On a group of objects, I need to keep fixed width & height for some objects while I scale the object.
我使用'对象:缩放'事件来获取活动对象的大小,我读取了组中的每个对象,并在我想要保持不变的组对象上分配元素[i] .set({'radius':5})。
I use the 'object:scaling' event to get the active object when it changes size, I read each object of the group and I assign element[i].set({'radius':5}) on the group objects that I want to be unchanged.
但结果是,所有要调整大小的组对象。
我向您展示的片段对象:缩放事件:
canvas.on('object:scaling',function(e){
var activeObject1 = e.target;
var elements = e.target._objects;
var count_elements = elements.length;
for(var i = 0; i < count_elements; i++) {
var type = elements[i].typeCircle;
if(type == "parts"){
//elements[i].set({"radius":8,"fill":"#abcde2","stroke":"#367827"});
//elements[i].set('radius',8);
/*elements[i].setWidth(16);
elements[i].setHeight(16);
elements[i].currentWidth = 16;
elements[i].currentHeight = 16;
elements[i].scaleX = 1;
elements[i].scaleY = 1;
console.log(elements[i]);
canvas.renderAll();*/
}
}
});
我应该在for循环中写什么来保持某些对象的固定大小?
我上面使用的所有内容,除了fill外,它们都不起作用:#abcde2,stroke:#367827
What should I write into the for loop to keep fixed size on some objects? everything that I used above, they don't work except for the "fill":"#abcde2","stroke":"#367827"
如果有人在fabricjs上遇到类似的事情,请告诉我。
If anyone has faced something similar on fabricjs, please let me know .
推荐答案
你必须使用setScaleX ()和setScaleY()方法。
这是一个例子......
You must use setScaleX() and setScaleY() methods. Here is an example...
var Rect = new fabric.Rect({
width: 200,
height: 200,
top: 100,
left: 100,
fill: 'rgba(255,0,0,0.5)',
stroke: '#000',
strokeWidth: 1,
});
var Circle = new fabric.Circle({
left: 100,
top: 100,
fill: '#FF00FF',
stroke: 'red',
radius: 100,
opacity: 1,
});
var Group = new fabric.Group([Rect, Circle])
canvas.add(Group)
canvas.on({
'object:scaling': onChange
})
function onChange(obj) {
var circle = obj.target.item(1),
group = obj.target,
scaleX = circle.width / group.getWidth(),
scaleY = circle.height / group.getHeight();
circle.setScaleX(scaleX);
circle.setScaleY(scaleY);
}
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