Fix drag-and-drop start gesture to only use long-press with touch, an…

…d also to use drag-start with mouse.

compose/foundation/foundation/src/skikoMain/kotlin/androidx/compose/foundation/draganddrop/DragAndDropSource.skiko.kt

@@ -16,26 +16,43 @@
 
 package androidx.compose.foundation.draganddrop
 
+import androidx.compose.foundation.PointerMatcher
+import androidx.compose.foundation.gestures.detectDragGestures
 import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.runtime.Immutable
 import androidx.compose.ui.draw.CacheDrawScope
 import androidx.compose.ui.draw.DrawResult
+import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.asComposeCanvas
 import androidx.compose.ui.graphics.drawscope.DrawScope
 import androidx.compose.ui.graphics.drawscope.draw
 import androidx.compose.ui.graphics.drawscope.drawIntoCanvas
 import androidx.compose.ui.graphics.nativeCanvas
+import androidx.compose.ui.input.pointer.PointerButton
+import androidx.compose.ui.input.pointer.PointerInputScope
 import org.jetbrains.skia.Picture
 import org.jetbrains.skia.PictureRecorder
 import org.jetbrains.skia.Rect
 
 @Immutable
 internal actual object DragAndDropSourceDefaults {
     actual val DefaultStartDetector: DragAndDropStartDetector = {
-        detectTapGestures(onLongPress = { offset -> requestDragAndDropTransfer(offset) })
+        detectDragStart(::requestDragAndDropTransfer)
     }
 }
 
+private suspend fun PointerInputScope.detectDragStart(onDragStart: (Offset) -> Unit) {
+    detectDragGestures(
+        matcher = PointerMatcher.mouse(PointerButton.Primary),
+        onDragStart = onDragStart,
+        onDrag = { _ -> }
+    )
+    detectTapGestures(
+        matcher = PointerMatcher.touch,
+        onLongPress = onDragStart
+    )
+}
+
 internal actual class CacheDrawScopeDragShadowCallback {
     private var cachedPicture: Picture? = null