diff options
Diffstat (limited to 'src/com/android/launcher3/dragndrop/ExternalDragPreviewProvider.java')
-rw-r--r-- | src/com/android/launcher3/dragndrop/ExternalDragPreviewProvider.java | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/com/android/launcher3/dragndrop/ExternalDragPreviewProvider.java b/src/com/android/launcher3/dragndrop/ExternalDragPreviewProvider.java new file mode 100644 index 000000000..6b14be714 --- /dev/null +++ b/src/com/android/launcher3/dragndrop/ExternalDragPreviewProvider.java @@ -0,0 +1,79 @@ +/* + * 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; + } +} |