[英]react-konva dragBound a zoomable stage
I am trying to make an application with react-konva in which an image covers the entire stage and the stage is draggable and zoomable.我正在尝试使用 react-konva 制作一个应用程序,其中图像覆盖整个舞台,并且舞台是可拖动和可缩放的。 So I am looking for a way to bound the drag to the edges of the image.
所以我正在寻找一种将拖动绑定到图像边缘的方法。
I looked at this demo and added a dragBoundFunc in my code but using this code I am able to dragBound my stage on the top and left edges only.我查看了这个演示并在我的代码中添加了一个dragBoundFunc,但是使用此代码我只能在顶部和左侧边缘拖动绑定我的舞台。
Demo: https://codesandbox.io/s/tender-chatterjee-ih31j演示: https://codesandbox.io/s/tender-chatterjee-ih31j
This may work:这可能有效:
const { stageWidth, stageHeight, stageScale } = this.state;
const x = Math.min(0, Math.max(pos.x, stageWidth * (1 - stageScale)));
const y = Math.min(0, Math.max(pos.y, stageHeight* (1 - stageScale)));
return {
x, y
};
Also, you may need to update zoom function to call bound func.此外,您可能需要更新 zoom function 以调用绑定函数。
Demo: https://codesandbox.io/s/react-konva-dragbound-for-stage-ne71c?file=/src/Demo.jsx演示: https://codesandbox.io/s/react-konva-dragbound-for-stage-ne71c?file=/src/Demo.jsx
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