reactjs 可拖动和可调整大小的组件

Question

在过去的几个小时里，我一直在尝试寻找一种方法来使 React 组件可拖动和可调整大小。我找到了一种使用 react drag and drop 使其可拖动的方法，但我找不到一种使其可调整大小的简单方法：/ 有没有人有关于如何使组件可拖动和可调整大小的经验？

感谢任何帮助或指点！

Answer 1

https://github.com/STRML/react-resizable

此答案仅适用于可调整大小的组件。您可以找到其他具有这两种功能的答案。

'use strict';
var React = require('react/addons');
typeof window !== "undefined" && (window.React = React); // for devtools
typeof window !== "undefined" && (window.Perf = React.addons.Perf); // for devtools
var _ = require('lodash');
var ResizableBox = require('../lib/ResizableBox.jsx');
var Resizable = require('../lib/Resizable.jsx');
require('style!css!../css/styles.css');

var TestLayout = module.exports = React.createClass({
  displayName: 'TestLayout',

  getInitialState() {
    return {width: 200, height: 200};
  },

  onClick() {
    this.setState({width: 200, height: 200})
  },

  onResize(event, {element, size}) {
    this.setState({width: size.width, height: size.height});
  },

  render() {
    return (
      <div>
        <button onClick={this.onClick} style={{'marginBottom': '10px'}}>Reset first element's width/height</button>
        <Resizable className="box" height={this.state.height} width={this.state.width} onResize={this.onResize}>
          <div className="box" style={{width: this.state.width + 'px', height: this.state.height + 'px'}}>
            <span className="text">{"Raw use of <Resizable> element. 200x200, no constraints."}</span>
          </div>
        </Resizable>
        <ResizableBox className="box" width={200} height={200}>
          <span className="text">{"<ResizableBox>, same as above."}</span>
        </ResizableBox>
        <ResizableBox className="box" width={200} height={200} draggableOpts={{grid: [25, 25]}}>
          <span className="text">Resizable box that snaps to even intervals of 25px.</span>
        </ResizableBox>
        <ResizableBox className="box" width={200} height={200} minConstraints={[150, 150]} maxConstraints={[500, 300]}>
          <span className="text">Resizable box, starting at 200x200. Min size is 150x150, max is 500x300.</span>
        </ResizableBox>
        <ResizableBox className="box box3" width={200} height={200} minConstraints={[150, 150]} maxConstraints={[500, 300]}>
          <span className="text">Resizable box with a handle that only appears on hover.</span>
        </ResizableBox>
        <ResizableBox className="box" width={200} height={200} lockAspectRatio={true}>
          <span className="text">Resizable square with a locked aspect ratio.</span>
        </ResizableBox>
        <ResizableBox className="box" width={200} height={120} lockAspectRatio={true}>
          <span className="text">Resizable rectangle with a locked aspect ratio.</span>
        </ResizableBox>
      </div>
    );
  }
});

Answer 2

使用react-grid-layout解决这个问题。专门用于日程安排小部件，用户可以在其中缩放时间块并沿水平时间线拖放它们。

react-grid-layout 提供了一个网格，其中包含可拖动和可调整大小的小部件以及响应式布局、可选的自动打包以及其他功能。

var ReactGridLayout = require('react-grid-layout');

// React component render function:
render: function() {
  return (
    <ReactGridLayout className="layout" cols={12} rowHeight={30}>
      <div key={1} _grid={{x: 0, y: 0, w: 1, h: 2}}>1</div>
      <div key={2} _grid={{x: 1, y: 0, w: 1, h: 2}}>2</div>
      <div key={3} _grid={{x: 2, y: 0, w: 1, h: 2}}>3</div>
    </ReactGridLayout>
  )
}

子节点可拖动且可调整大小。每个子“_grid”道具中定义的布局也可以直接在父 "layout" 道具上定义：

// React component render function:
render: function() {
  // layout is an array of objects, see the demo
  var layout = getOrGenerateLayout();
  return (
    <ReactGridLayout className="layout" layout={layout} cols={12} rowHeight={30}>
      <div key={1}>1</div>
      <div key={2}>2</div>
      <div key={3}>3</div>
    </ReactGridLayout>
  )
}

回调函数可以作为 props 传递给组件。连接到这些应该允许您定义任何自定义行为：

// Calls when drag starts.
onDragStart: React.PropTypes.func,
// Calls on each drag movement.
onDrag: React.PropTypes.func,
// Calls when drag is complete.
onDragStop: React.PropTypes.func,
// Calls when resize starts.
onResizeStart: React.PropTypes.func,
// Calls when resize movement happens.
onResize: React.PropTypes.func,
// Calls when resize is complete.
onResizeStop: React.PropTypes.func

文档中的代码示例： https://github.com/STRML/react-grid-layout

演示在这里： https://strml.github.io/react-grid-layout/examples/0-showcase.html

Answer 3

我一直在使用 react-rnd 并且非常满意：https://github.com/bokuweb/react-rnd

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