detectDragGestures
Gesture detector that waits for pointer down and touch slop in any direction and then calls onDrag for each drag event. It follows the touch slop detection of awaitTouchSlopOrCancellation but will consume the position change automatically once the touch slop has been crossed.
Entity is not interactable by default. To make an Entity interactable, you should both add a InteractableComponent and a CollisionComponent to this entity.
When targetedToEntity is set, means that this gesture detector is bind to Entity that match TargetEntity's rule.
onDragStart called when the touch slop has been passed and includes an Offset representing the last known pointer position relative to the containing element. The Offset can be outside the actual bounds of the element itself meaning the numbers can be negative or larger than the element bounds if the touch target is smaller than the ViewConfiguration.minimumTouchTargetSize.
onDragEnd is called after all pointers are up and onDragCancel is called if another gesture has consumed pointer input, canceling this gesture.
Parameters
Invoked when start drag.
Invoked when finish drag.
Invoked when drag is canceled.
Android context. You can get context by LocalContext.current.
Indicate how this gesture detector bind to Entity. If is null, both 2D and 3D interaction event can be detected by this gesture.
Invoked when is dragging.
Samples
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.platform.LocalContext
import com.pico.spatial.core.ecs.CollisionComponent
import com.pico.spatial.core.ecs.Entity
import com.pico.spatial.core.ecs.InteractableComponent
import com.pico.spatial.core.ecs.TransformComponent
import com.pico.spatial.core.ecs.ViewCoordinateSpace
import com.pico.spatial.core.ecs.resource.PhysicsMaterialResource
import com.pico.spatial.core.ecs.resource.ShapeResource
import com.pico.spatial.ui.foundation.content.SpatialView
import com.pico.spatial.ui.foundation.gesture.TargetEntity
import com.pico.spatial.ui.foundation.gesture.data.InputDevicePose
import com.pico.spatial.ui.foundation.gesture.detectDragGestures
import com.pico.spatial.ui.foundation.gesture.detectDragGesturesAfterLongPress
import com.pico.spatial.ui.foundation.gesture.detectHorizontalDragGestures
import com.pico.spatial.ui.foundation.gesture.detectSpatialPointerEvent
import com.pico.spatial.ui.foundation.gesture.detectTapGestures
import com.pico.spatial.ui.foundation.gesture.detectVerticalDragGestures
fun main() {
//sampleStart
val context = LocalContext.current
SpatialView(
modifier =
Modifier.fillMaxSize() // make it as large as possible to receive touch event
.pointerInput(Unit) {
detectDragGestures(context = context, targetedToEntity = TargetEntity.any()) {
change,
dragAmount ->
// do something here
println("ondrag, delta: x = ${dragAmount.x}, y = ${dragAmount.y}")
}
}
) { content, _ ->
val entity = Entity()
// Entity is not interactable by default. To make an entity interactable, you should both
// add a
// [InputTargetComponent] and a [CollisionComponent].
entity.components.set(InteractableComponent())
entity.components.set(
CollisionComponent(
collisionShape = listOf(ShapeResource.createSphere(radius = 0.3f)),
physicsMaterial = PhysicsMaterialResource(),
)
)
content.addEntity(entity)
}
//sampleEnd
}