react-grid-layout
Draggable shifts position after reload of page (persistent coordinates)
Hi, I am developing an application where users can create views consisting of draggable components. As i want the views to be persistent i store the x/y-coordinates of each component in a database. When a page (view) is rendered, i then fetch the coordinates and use these to populate the view (using the defaultPosition-prop)
This works great but i have an infuriating problem. The first time a view is refreshed after a new component is added to a view (and saved), the components will shift position down and to the right. I made a short video showcasing the problem:
https://streamable.com/h00fm8
As can be seen in the console - the coordinates used when rendering the view after the reload are identical to the ones that are saved, but for some reason the element moves!
Here is my draggable component:
return (
<Draggable
grid={[25, 25]} disabled={!props.editingEnabled} defaultPosition={{x: x, y: y}} onStop={handleStop}>
<div style={{position: "static"}} //have tried with absolute and fixed as well, didn't help
<h1>Testing</h1>
</div>
</Draggable>
)
handleStop:
const handleStop = (event) => {
let x = event.layerX;
let y = event.layerY;
console.log("Saving position of element");
console.log("Saving X/Y-position " + x + ", " + y);
setX(x);
setY(y);
props.handleMoveCallback(x, y, props.componentName)
};
handleMoveCallback is in the parent of the element:
handleMoveCallback = (x, y, componentName) => {
this.updateComponent(x, y, componentName);
};
updateComponent = (x, y, componentName) => {
let existingPositions = this.state.componentPositions;
if (existingCompNames.includes(componentName)) {
let objIndex = existingPositions.findIndex((ep => ep.componentName === componentName));
existingPositions[objIndex].x = x;
existingPositions[objIndex].y = y;
this.setState(
{ componentPositions: existingPositions }, this.saveView());
}
};
saveView just posts the array of component positions to the backing API where it's stored in the database. The components are then rendered inside of an absolute position div:
....
let components = this.state.componentPositions.map((c) =>
<DraggableFunctionComponent id={c.componentName} key={c.componentName}
x={c.x} y={c.y}
componentName={c.componentName} parentCallBack={this.handleMoveCallback}
/>
.....
<div style={{ position: "absolute" }}>
{components}
</div>
Any help would be greatly appreciated
I'm having this same issue, I believe.
I'm setting the x and y positions with defaultPosition. On first load, it works. On rerender (changing props and changing back) it no longer calculates the correct x and y position.
