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Android: implements list drag feature

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王劲鹏 2022-06-17 15:44:17 +08:00 committed by osborn
parent 81cff61620
commit a9575cf67f
1 changed files with 173 additions and 0 deletions
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173
doric-android/doric/src/main/java/pub/doric/shader/list/ListNode.java
View File

@ -23,6 +23,8 @@ import android.view.MotionEvent;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
@ -76,6 +78,38 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
private boolean scrollable = true;
private final DoricItemTouchHelperCallback doricItemTouchHelperCallback = new DoricItemTouchHelperCallback(
new OnItemTouchCallbackListener() {
@Override
public void onSwiped(int adapterPosition) {
}
@Override
public boolean onMove(int srcPosition, int targetPosition) {
String srcValue = itemValues.valueAt(srcPosition);
String targetValue = itemValues.valueAt(targetPosition);
itemValues.setValueAt(srcPosition, targetValue);
itemValues.setValueAt(targetPosition, srcValue);
listAdapter.notifyItemMoved(srcPosition, targetPosition);
if (!TextUtils.isEmpty(onDraggingFuncId)) {
callJSResponse(onDraggingFuncId, srcPosition, targetPosition);
}
return true;
}
@Override
public void onMoved(int fromPos, int toPos) {
if (!TextUtils.isEmpty(onDraggedFuncId)) {
callJSResponse(onDraggedFuncId, fromPos, toPos);
}
}
}
);
private String onDraggingFuncId;
private String onDraggedFuncId;
@Override
protected void blendSubNode(JSObject subProperties) {
String viewId = subProperties.getProperty("id").asString().value();
@ -162,6 +196,11 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
return gestureDetector.onTouchEvent(e);
}
});
DoricItemTouchHelper doricItemTouchHelper = new DoricItemTouchHelper(doricItemTouchHelperCallback);
doricItemTouchHelper.attachToRecyclerView(recyclerView);
return recyclerView;
}
@ -249,6 +288,25 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
}
});
break;
case "canDrag":
if (!prop.isBoolean()) {
return;
}
boolean canDrag = prop.asBoolean().value();
doricItemTouchHelperCallback.setDragEnable(canDrag);
break;
case "onDragging":
if (!prop.isString()) {
return;
}
this.onDraggingFuncId = prop.asString().value();
break;
case "onDragged":
if (!prop.isString()) {
return;
}
this.onDraggedFuncId = prop.asString().value();
break;
default:
super.blend(view, name, prop);
break;
@ -362,5 +420,120 @@ public class ListNode extends SuperNode<RecyclerView> implements IDoricScrollabl
onScrollFuncId = null;
onScrollEndFuncId = null;
renderItemFuncId = null;
onDraggedFuncId = null;
onDraggingFuncId = null;
}
private static class DoricItemTouchHelper extends ItemTouchHelper {
/**
* Creates an ItemTouchHelper that will work with the given Callback.
* <p>
* You can attach ItemTouchHelper to a RecyclerView via
* {@link #attachToRecyclerView(RecyclerView)}. Upon attaching, it will add an item decoration,
* an onItemTouchListener and a Child attach / detach listener to the RecyclerView.
*
* @param callback The Callback which controls the behavior of this touch helper.
*/
public DoricItemTouchHelper(@NonNull Callback callback) {
super(callback);
}
}
private static class DoricItemTouchHelperCallback extends ItemTouchHelper.Callback {
private OnItemTouchCallbackListener onItemTouchCallbackListener;
private boolean isCanDrag = false;
private boolean isCanSwipe = false;
private int fromPos;
private int toPos;
public DoricItemTouchHelperCallback(OnItemTouchCallbackListener onItemTouchCallbackListener) {
this.onItemTouchCallbackListener = onItemTouchCallbackListener;
}
public void setOnItemTouchCallbackListener(OnItemTouchCallbackListener onItemTouchCallbackListener) {
this.onItemTouchCallbackListener = onItemTouchCallbackListener;
}
public void setDragEnable(boolean canDrag) {
isCanDrag = canDrag;
}
public void setSwipeEnable(boolean canSwipe) {
isCanSwipe = canSwipe;
}
@Override
public boolean isLongPressDragEnabled() {
return isCanDrag;
}
@Override
public boolean isItemViewSwipeEnabled() {
return isCanSwipe;
}
@Override
public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManager instanceof LinearLayoutManager) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
int orientation = linearLayoutManager.getOrientation();
int dragFlag = 0;
int swipeFlag = 0;
if (orientation == LinearLayoutManager.VERTICAL) {
dragFlag = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
swipeFlag = ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
}
return makeMovementFlags(dragFlag, swipeFlag);
}
return 0;
}
@Override
public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
if (onItemTouchCallbackListener != null) {
return onItemTouchCallbackListener.onMove(viewHolder.getAdapterPosition(), target.getAdapterPosition());
}
return false;
}
@Override
public void onSelectedChanged(@Nullable RecyclerView.ViewHolder viewHolder, int actionState) {
super.onSelectedChanged(viewHolder, actionState);
if (viewHolder != null) {
fromPos = viewHolder.getAdapterPosition();
}
}
@Override
public void clearView(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
super.clearView(recyclerView, viewHolder);
toPos = viewHolder.getAdapterPosition();
if (onItemTouchCallbackListener != null) {
onItemTouchCallbackListener.onMoved(fromPos, toPos);
}
}
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
if (onItemTouchCallbackListener != null) {
onItemTouchCallbackListener.onSwiped(viewHolder.getAdapterPosition());
}
}
}
private interface OnItemTouchCallbackListener {
void onSwiped(int adapterPosition);
boolean onMove(int srcPosition, int targetPosition);
void onMoved(int fromPos, int toPos);
}
}