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/*
* Copyright (C) 2018 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.touch;
import static android.view.View.INVISIBLE;
import static android.view.View.VISIBLE;
import static com.android.launcher3.LauncherState.ALL_APPS;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.LauncherState.OVERVIEW;
import android.view.View;
import android.view.View.OnLongClickListener;
import com.android.launcher3.CellLayout;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.DropTarget;
import com.android.launcher3.ItemInfo;
import com.android.launcher3.Launcher;
import com.android.launcher3.dragndrop.DragController;
import com.android.launcher3.dragndrop.DragOptions;
import com.android.launcher3.folder.Folder;
/**
* Class to handle long-clicks on workspace items and start drag as a result.
*/
public class ItemLongClickListener {
public static OnLongClickListener INSTANCE_WORKSPACE =
ItemLongClickListener::onWorkspaceItemLongClick;
public static OnLongClickListener INSTANCE_ALL_APPS =
ItemLongClickListener::onAllAppsItemLongClick;
private static boolean onWorkspaceItemLongClick(View v) {
Launcher launcher = Launcher.getLauncher(v.getContext());
if (!canStartDrag(launcher)) return false;
if (!launcher.isInState(NORMAL) && !launcher.isInState(OVERVIEW)) return false;
if (!(v.getTag() instanceof ItemInfo)) return false;
launcher.setWaitingForResult(null);
beginDrag(v, launcher, (ItemInfo) v.getTag(), new DragOptions());
return true;
}
public static void beginDrag(View v, Launcher launcher, ItemInfo info,
DragOptions dragOptions) {
if (info.container >= 0) {
Folder folder = Folder.getOpen(launcher);
if (folder != null) {
if (!folder.getIconsInReadingOrder().contains(v)) {
folder.close(true);
} else {
folder.startDrag(v, dragOptions);
return;
}
}
}
CellLayout.CellInfo longClickCellInfo = new CellLayout.CellInfo(v, info);
launcher.getWorkspace().startDrag(longClickCellInfo, dragOptions);
}
private static boolean onAllAppsItemLongClick(View v) {
Launcher launcher = Launcher.getLauncher(v.getContext());
if (!canStartDrag(launcher)) return false;
// When we have exited all apps or are in transition, disregard long clicks
if (!launcher.isInState(ALL_APPS) && !launcher.isInState(OVERVIEW)) return false;
if (launcher.getWorkspace().isSwitchingState()) return false;
// Start the drag
final DragController dragController = launcher.getDragController();
dragController.addDragListener(new DragController.DragListener() {
@Override
public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
v.setVisibility(INVISIBLE);
}
@Override
public void onDragEnd() {
v.setVisibility(VISIBLE);
dragController.removeDragListener(this);
}
});
DeviceProfile grid = launcher.getDeviceProfile();
DragOptions options = new DragOptions();
options.intrinsicIconScaleFactor = (float) grid.allAppsIconSizePx / grid.iconSizePx;
launcher.getWorkspace().beginDragShared(v, launcher.getAppsView(), options);
return false;
}
public static boolean canStartDrag(Launcher launcher) {
if (launcher == null) {
return false;
}
// We prevent dragging when we are loading the workspace as it is possible to pick up a view
// that is subsequently removed from the workspace in startBinding().
if (launcher.isWorkspaceLocked()) return false;
// Return early if an item is already being dragged (e.g. when long-pressing two shortcuts)
if (launcher.getDragController().isDragging()) return false;
return true;
}
}
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