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import React from "react";
import _ from "lodash";
import RGL, { WidthProvider } from "react-grid-layout";
const ReactGridLayout = WidthProvider(RGL);
/**
* This layout demonstrates how to use the `onResize` handler to enforce a min/max width and height.
*
* In this grid, all elements are allowed a max width of 2 if the height < 3,
* and a min width of 2 if the height >= 3.
*/
export default class DynamicMinMaxLayout extends React.PureComponent {
static defaultProps = {
isDraggable: true,
isResizable: true,
items: 20,
rowHeight: 30,
onLayoutChange: function() {},
cols: 12
};
generateDOM() {
// Generate items with properties from the layout, rather than pass the layout directly
const layout = this.generateLayout();
return _.map(layout, function(l) {
return (
<div key={l.i} data-grid={l}>
<span className="text">{l.i}</span>
</div>
);
});
}
generateLayout() {
const p = this.props;
return _.map(new Array(p.items), function(item, i) {
const w = _.random(1, 2);
const h = _.random(1, 3);
return {
x: (i * 2) % 12,
y: Math.floor(i / 6),
w: w,
h: h,
i: i.toString()
};
});
}
onLayoutChange(layout) {
this.props.onLayoutChange(layout);
}
onResize(layout, oldLayoutItem, layoutItem, placeholder) {
// `oldLayoutItem` contains the state of the item before the resize.
// You can modify `layoutItem` to enforce constraints.
if (layoutItem.h < 3 && layoutItem.w > 2) {
layoutItem.w = 2;
placeholder.w = 2;
}
if (layoutItem.h >= 3 && layoutItem.w < 2) {
layoutItem.w = 2;
placeholder.w = 2;
}
}
render() {
return (
<ReactGridLayout
onLayoutChange={this.onLayoutChange}
onResize={this.onResize}
{...this.props}
>
{this.generateDOM()}
</ReactGridLayout>
);
}
}
if (process.env.STATIC_EXAMPLES === true) {
import("../test-hook.jsx").then(fn => fn.default(DynamicMinMaxLayout));
}
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