drag-and-drop

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I created a form on a website that allows users to upload files. Users can also drag and drop files onto this form. However, on some devices, it is simply not possible to drag and drop files (e.g. on my iPhone). So I only want to display the text "Drag and drop files here" only on devices on which it makes sense. Is there a way to detect whether the device supports drag and drop files in principle? A workaround could be to detect if a mouse pointer is moving. In this case, I would guess it is

问题 In the zoomed mode for pinch-zoom the drag doesn't align properly with the mouse pointer. I've detailed the problem here:https://stackblitz.com/edit/angular-t7hwqg I expect the drag to work same way irrespective of the zoom. I saw in version 8 of angular material they have added @Input('cdkDragConstrainPosition') constrainPosition: (point: Point, dragRef: DragRef) => Point, which will solve my problem as in the zoomed mode I can write a custom logic to map the drag properly with pointer, but

问题 In the zoomed mode for pinch-zoom the drag doesn't align properly with the mouse pointer. I've detailed the problem here:https://stackblitz.com/edit/angular-t7hwqg I expect the drag to work same way irrespective of the zoom. I saw in version 8 of angular material they have added @Input('cdkDragConstrainPosition') constrainPosition: (point: Point, dragRef: DragRef) => Point, which will solve my problem as in the zoomed mode I can write a custom logic to map the drag properly with pointer, but

问题 I cannot figure out how to use Angular's Drag and Drop module for something other than move items between lists. I have a list of items and I want to drag them on individual groups. Incidentally, there are two lists involved here, one list with groups and one list with items. Here's the template code (please see this https://stackblitz.com/edit/angular-xp4um9 for the full code): <div class="container"> <div class="drop-target"> <mat-selection-list cdkDropList #dropTarget="cdkDropList"