I would like to convert my Swing application to Compose Ther

Question

I would like to convert my Swing application to Compose Therefore I need multi select support for a LazyColumn I have found some open source implementations but none of them support multi select with ctrl shift key for selecting ranges of elements Is there anyone who has already implemented something like this

Lucas · Answer

This looks similar to <https github com JetBrains compose multiplatform issues 344> even if not a table No specific solutions in here just thought it was worth mentioning

MatthiasMeger · Answer

I added a PointerEvent to each item ``` onPointerEvent PointerEventType Press clicked item it ``` In clicked I check which mouse button was pressed and which keys pointerEvent keyboardModifiers isCtrlPressed and pointerEvent keyboardModifiers isShiftPressed This way I fill a mutableStateListOf with all selected items I think the behavior is now like in my old Swing list not easy to get all cases right with ctrl shift thinking face However my items are wrapped in a ContextMenuArea to show a context menu for each item In Swing right clicking to open the context menu also selects an item but only if it s not already selected then ALL selected items remain selected My problem now is When the context menu opens the PointerEvent Press is fired so I can check if the clicked item needs to be selected However if I right click another item while the context menu is still open then no PointerEvent Press is fired Any ideas how to get PointerEvents for right clicking while the context menu is open By the way The documentation for the onPointerEvent modifier says Note that this function is experimental and can be replaced in the future by high level functions Is it known if there is a real plan to replace these features

MatthiasMeger · Answer

Dima Avdeev answered a question from Hondogo Paul about pointer drag events The coding works in my case as well ``` modifier = Modifier pointerInput Unit awaitPointerEventScope while true val pointerEvent = awaitPointerEvent val isMouseDown = pointerEvent buttons areAnyPressed if isMouseDown println click in pointer input modifier clicked solution pointerEvent onPointerEvent PointerEventType Press println click in onPointerEvent ``` The text click in pointer input modifier is also printed when I right click while a contextMenu is displayed However the text click in onPointerEvent is not displayed so that pointer event isn t fired when a contextMenu is open and then another item is clicked So the solution for me is to use the pointerInput Unit modifier to check for clicks while the contextMenu is open