B4J Library [class] CLVDragger - drag to reorder items

[Erel]

Usage:
- Call dragger.AddDragButtons to add the drag button.
- Call dragger.RemoveDragButtons to remove the buttons.
- Call dragger.Resize when the parent resizes.

See the attached example.

For now it is a B4J only class.

Depends on jXUI v1.91+ and xCustumListView v1.70+

 

[Cableguy]

It just might be handy...

 

[Eme Fibonacci]

I Can see something like this on my android 8.

Of course, this can be checked in settings > System> Languages & Input> Language> Language Preferences.

Maybe android version may have others functions:

In android 8 this type of vision is always movable.
There is a title bar and a "more" button on the top right side.
At bottom of list there is a "Add another item" button.

Just a suggestion.

 

[GanjaKyp]

Any animation is possible?

 

[Erel]

No animation is implemented in this class. You will need to implement it yourself.

 

[cimperia]

How would it be possible to enhance the drag action so that it does not stop when the dragged item reaches the top of the CLV window when there are still some items above it?

In other words, there's a CLV with 50 items say, and 10 are displayed at a time. You start dragging item 50 and when it reaches item 40, ie the top of the CLV window, the dragging action stops, even though the item is still pressed. One way to keep the dragging going is to continuously wiggle the finger on the item, but it's not very satisfying from a user viewpoint.

How could we modify the code so that the dragging carries on until the finger is lifted?

Thank you.

 

[Erel]

The actual dragging happens in Drag_MousePressed inside the loop where it waits for MouseDragged events. In this implementation it will only change the offset when the dragged event is raised. You will need to add a timer or a loop with sleep that changes the offset based on the current state.

 

[Ferdari]

Hi @Erel Is it now available to Android or maybe an alternative?

 

[Erel]

See the first post: "For now it is a B4J only class. "

 

[Bill Milleker]

When there are only a few items, I'm seeing a problem when the CustomListView resizes.

In the example code, set the loop to add only 6 items. When the window is resized, each item's width shrinks to accommodate a non-existent scroll bar.

When an item is dragged and dropped, it expands to full width.

 

[Erel]

It is not related to CLVDragger. You can hide the scrollbar in CLV properties.

 

[Bill Milleker]

For those coming to this question later, code to show/hide the CLV programmatically can be found at https://www.b4x.com/android/forum/threads/customlistview-scrollbar-visibility.106793/.