| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.launcher3.dragndrop; |
| |
| import android.content.ClipData; |
| import android.content.ClipDescription; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.view.DragEvent; |
| import android.view.MotionEvent; |
| |
| import com.android.launcher3.DropTarget; |
| import com.android.launcher3.DropTarget.DragObject; |
| import com.android.launcher3.InstallShortcutReceiver; |
| import com.android.launcher3.ShortcutInfo; |
| import com.android.launcher3.Utilities; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Base class for driving a drag/drop operation. |
| */ |
| public abstract class DragDriver { |
| protected final EventListener mEventListener; |
| |
| public interface EventListener { |
| void onDriverDragMove(float x, float y); |
| void onDriverDragExitWindow(); |
| void onDriverDragEnd(float x, float y, DropTarget dropTargetOverride); |
| void onDriverDragCancel(); |
| } |
| |
| public DragDriver(EventListener eventListener) { |
| mEventListener = eventListener; |
| } |
| |
| /** |
| * Handles ending of the DragView animation. |
| */ |
| public void onDragViewAnimationEnd() { } |
| |
| public boolean onTouchEvent(MotionEvent ev) { |
| final int action = ev.getAction(); |
| |
| switch (action) { |
| case MotionEvent.ACTION_MOVE: |
| mEventListener.onDriverDragMove(ev.getX(), ev.getY()); |
| break; |
| case MotionEvent.ACTION_UP: |
| mEventListener.onDriverDragMove(ev.getX(), ev.getY()); |
| mEventListener.onDriverDragEnd(ev.getX(), ev.getY(), null); |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| mEventListener.onDriverDragCancel(); |
| break; |
| } |
| |
| return true; |
| } |
| |
| public abstract boolean onDragEvent (DragEvent event); |
| |
| |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| final int action = ev.getAction(); |
| |
| switch (action) { |
| case MotionEvent.ACTION_UP: |
| mEventListener.onDriverDragEnd(ev.getX(), ev.getY(), null); |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| mEventListener.onDriverDragCancel(); |
| break; |
| } |
| |
| return true; |
| } |
| |
| public static DragDriver create(Context context, DragController dragController, |
| DragObject dragObject, DragOptions options) { |
| if (Utilities.isNycOrAbove() && options.systemDndStartPoint != null) { |
| return new SystemDragDriver(dragController, context, dragObject); |
| } else { |
| return new InternalDragDriver(dragController); |
| } |
| } |
| } |
| |
| /** |
| * Class for driving a system (i.e. framework) drag/drop operation. |
| */ |
| class SystemDragDriver extends DragDriver { |
| |
| private final DragObject mDragObject; |
| private final Context mContext; |
| |
| boolean mReceivedDropEvent = false; |
| float mLastX = 0; |
| float mLastY = 0; |
| |
| public SystemDragDriver(DragController dragController, Context context, DragObject dragObject) { |
| super(dragController); |
| mDragObject = dragObject; |
| mContext = context; |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent ev) { |
| return false; |
| } |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| return false; |
| } |
| |
| @Override |
| public boolean onDragEvent (DragEvent event) { |
| final int action = event.getAction(); |
| |
| switch (action) { |
| case DragEvent.ACTION_DRAG_STARTED: |
| mLastX = event.getX(); |
| mLastY = event.getY(); |
| return true; |
| |
| case DragEvent.ACTION_DRAG_ENTERED: |
| return true; |
| |
| case DragEvent.ACTION_DRAG_LOCATION: |
| mLastX = event.getX(); |
| mLastY = event.getY(); |
| mEventListener.onDriverDragMove(event.getX(), event.getY()); |
| return true; |
| |
| case DragEvent.ACTION_DROP: |
| mLastX = event.getX(); |
| mLastY = event.getY(); |
| mReceivedDropEvent = |
| updateInfoFromClipData(event.getClipData(), event.getClipDescription()); |
| return mReceivedDropEvent; |
| |
| case DragEvent.ACTION_DRAG_EXITED: |
| mEventListener.onDriverDragExitWindow(); |
| return true; |
| |
| case DragEvent.ACTION_DRAG_ENDED: |
| if (mReceivedDropEvent) { |
| mEventListener.onDriverDragEnd(mLastX, mLastY, null); |
| } else { |
| mEventListener.onDriverDragCancel(); |
| } |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| private boolean updateInfoFromClipData(ClipData data, ClipDescription desc) { |
| if (data == null) { |
| return false; |
| } |
| ArrayList<Intent> intents = new ArrayList<>(); |
| int itemCount = data.getItemCount(); |
| for (int i = 0; i < itemCount; i++) { |
| Intent intent = data.getItemAt(i).getIntent(); |
| if (intent == null) { |
| continue; |
| } |
| |
| // Give preference to shortcut intents. |
| if (!Intent.ACTION_CREATE_SHORTCUT.equals(intent.getAction())) { |
| intents.add(intent); |
| continue; |
| } |
| ShortcutInfo info = InstallShortcutReceiver.fromShortcutIntent(mContext, intent); |
| if (info != null) { |
| mDragObject.dragInfo = info; |
| return true; |
| } |
| return true; |
| } |
| |
| // Try creating shortcuts just using the intent and label |
| Intent fullIntent = new Intent().putExtra(Intent.EXTRA_SHORTCUT_NAME, desc.getLabel()); |
| for (Intent intent : intents) { |
| fullIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, intent); |
| ShortcutInfo info = InstallShortcutReceiver.fromShortcutIntent(mContext, fullIntent); |
| if (info != null) { |
| mDragObject.dragInfo = info; |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| } |
| |
| /** |
| * Class for driving an internal (i.e. not using framework) drag/drop operation. |
| */ |
| class InternalDragDriver extends DragDriver { |
| public InternalDragDriver(DragController dragController) { |
| super(dragController); |
| } |
| |
| @Override |
| public boolean onDragEvent (DragEvent event) { return false; } |
| }; |