| /* |
| * Copyright (C) 2016 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.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| |
| import com.android.launcher3.DeviceProfile; |
| import com.android.launcher3.HolographicOutlineHelper; |
| import com.android.launcher3.ItemInfo; |
| import com.android.launcher3.Launcher; |
| import com.android.launcher3.graphics.DragPreviewProvider; |
| |
| /** |
| * Extension of {@link DragPreviewProvider} which provides a dummy outline when drag starts from |
| * a different window. |
| * It just draws an empty circle to a placeholder outline. |
| */ |
| public class ExternalDragPreviewProvider extends DragPreviewProvider { |
| |
| private final Launcher mLauncher; |
| private final ItemInfo mAddInfo; |
| |
| private final int[] mOutlineSize; |
| |
| public ExternalDragPreviewProvider(Launcher launcher, ItemInfo addInfo) { |
| super(null); |
| mLauncher = launcher; |
| mAddInfo = addInfo; |
| |
| mOutlineSize = mLauncher.getWorkspace().estimateItemSize(mAddInfo, false); |
| } |
| |
| public Rect getPreviewBounds() { |
| Rect rect = new Rect(); |
| DeviceProfile dp = mLauncher.getDeviceProfile(); |
| rect.left = DRAG_BITMAP_PADDING / 2; |
| rect.top = (mOutlineSize[1] - dp.cellHeightPx) / 2; |
| rect.right = rect.left + dp.iconSizePx; |
| rect.bottom = rect.top + dp.iconSizePx; |
| return rect; |
| } |
| |
| @Override |
| public Bitmap createDragOutline(Canvas canvas) { |
| final Bitmap b = Bitmap.createBitmap(mOutlineSize[0], mOutlineSize[1], Bitmap.Config.ALPHA_8); |
| canvas.setBitmap(b); |
| |
| Paint paint = new Paint(); |
| paint.setColor(Color.WHITE); |
| paint.setStyle(Paint.Style.FILL); |
| |
| // Use 0.9f times the radius for the actual circle to account for icon normalization. |
| float radius = getPreviewBounds().width() * 0.5f; |
| canvas.drawCircle(DRAG_BITMAP_PADDING / 2 + radius, |
| DRAG_BITMAP_PADDING / 2 + radius, radius * 0.9f, paint); |
| |
| HolographicOutlineHelper.obtain(mLauncher).applyExpensiveOutlineWithBlur(b, canvas); |
| canvas.setBitmap(null); |
| return b; |
| } |
| } |