Keep a selected block lifted as its resize lands (#141)

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/TimelineDrag.kt

@@ -481,6 +481,10 @@ class TimelineDragController {
     var settledOnGrid: Boolean by mutableStateOf(false)
         private set
 
+    /** Whether the settling drop is the selected event, whose block lands still lifted. */
+    var settlingSelected: Boolean = false
+        private set
+
     /**
      * The abandoned-move counter, read at the drop so the mark can't be a
      * composition behind the tick it is compared against.
@@ -579,6 +583,7 @@ class TimelineDragController {
         settledOnGrid = false
         settledOrigin = null
         settledEnd = null
+        settlingSelected = false
     }
 
     /**
@@ -635,6 +640,7 @@ class TimelineDragController {
         val clipOffset = clipOffsetMin
         cancel()
         if (landed == null || landed.slot == origin) return null
+        settlingSelected = selection?.event?.instanceId == landed.event.instanceId
         // An edge piece is a hint for the finger, not a preview of the landing
         // slot: the event belongs to a day this timeline has no column for, so
         // [noteGrid] can never seat it and it would sit at the top of today for
@@ -697,6 +703,7 @@ class TimelineDragController {
         val origin = originSlot
         cancel()
         if (landed == null || landed.slot == origin) return null
+        settlingSelected = selection?.event?.instanceId == landed.event.instanceId
         settling = if (landed.edgeOnly) landed.copy(pieces = emptyList()) else landed
         liftedInstanceId = landed.event.instanceId
         settledOrigin = landed.event.eventId to landed.event.start
@@ -804,6 +811,7 @@ class TimelineDragController {
         settling = null
         settledOnGrid = false
         settledEnd = null
+        settlingSelected = false
         handOver()
     }
 
@@ -1026,7 +1034,8 @@ fun TimelineDragOverlay(controller: TimelineDragController, modifier: Modifier =
         // Landed: the copy sinks back to the grid's own plane while the write runs.
         val landed = controller.drag == null
         val lift by animateFloatAsState(
-            targetValue = if (landed || reduceMotion) 0f else 1f,
+            // A selected event's block is lifted too: sinking first made it shrink, then grow back.
+            targetValue = if (reduceMotion || (landed && !controller.settlingSelected)) 0f else 1f,
             label = "drag-lift",
         )
         val copyAlpha by animateFloatAsState(