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/*
* 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.widget;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.util.Size;
import android.view.View;
import android.view.View.MeasureSpec;
import android.widget.RemoteViews;
import androidx.annotation.Nullable;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.DragSource;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherAppState;
import com.android.launcher3.PendingAddItemInfo;
import com.android.launcher3.R;
import com.android.launcher3.dragndrop.DragOptions;
import com.android.launcher3.dragndrop.DraggableView;
import com.android.launcher3.graphics.DragPreviewProvider;
import com.android.launcher3.icons.FastBitmapDrawable;
import com.android.launcher3.icons.LauncherIcons;
import com.android.launcher3.icons.RoundDrawableWrapper;
import com.android.launcher3.testing.TestProtocol;
import com.android.launcher3.widget.dragndrop.AppWidgetHostViewDragListener;
import com.android.launcher3.widget.util.WidgetSizes;
/**
* Extension of {@link DragPreviewProvider} with logic specific to pending widgets/shortcuts
* dragged from the widget tray.
*/
public class PendingItemDragHelper extends DragPreviewProvider {
private static final float MAX_WIDGET_SCALE = 1.25f;
private final PendingAddItemInfo mAddInfo;
private int[] mEstimatedCellSize;
@Nullable private RemoteViews mRemoteViewsPreview;
private float mRemoteViewsPreviewScale = 1f;
@Nullable private NavigableAppWidgetHostView mAppWidgetHostViewPreview;
private final float mEnforcedRoundedCornersForWidget;
public PendingItemDragHelper(View view) {
super(view);
mAddInfo = (PendingAddItemInfo) view.getTag();
mEnforcedRoundedCornersForWidget = RoundedCornerEnforcement.computeEnforcedRadius(
view.getContext());
}
/**
* Sets a {@link RemoteViews} which shows an app widget preview provided by app developers in
* the pin widget flow.
*/
public void setRemoteViewsPreview(@Nullable RemoteViews remoteViewsPreview,
float previewScale) {
mRemoteViewsPreview = remoteViewsPreview;
mRemoteViewsPreviewScale = previewScale;
}
/** Sets a {@link NavigableAppWidgetHostView} which shows a preview layout of an app widget. */
public void setAppWidgetHostViewPreview(
@Nullable NavigableAppWidgetHostView appWidgetHostViewPreview) {
mAppWidgetHostViewPreview = appWidgetHostViewPreview;
}
/**
* Starts the drag for the pending item associated with the view.
*
* @param previewBounds The bounds where the image was displayed,
* {@link WidgetImageView#getBitmapBounds()}
* @param previewBitmapWidth The actual width of the bitmap displayed in the view.
* @param previewViewWidth The width of {@link WidgetImageView} displaying the preview
* @param screenPos Position of {@link WidgetImageView} on the screen
*/
public void startDrag(Rect previewBounds, int previewBitmapWidth, int previewViewWidth,
Point screenPos, DragSource source, DragOptions options) {
if (TestProtocol.sDebugTracing) {
Log.d(TestProtocol.NO_DROP_TARGET, "3");
}
final Launcher launcher = Launcher.getLauncher(mView.getContext());
LauncherAppState app = LauncherAppState.getInstance(launcher);
Drawable preview = null;
final int previewWidth;
final int previewHeight;
final float scale;
final Point dragOffset;
final Rect dragRegion;
mEstimatedCellSize = launcher.getWorkspace().estimateItemSize(mAddInfo);
DraggableView draggableView;
if (mAddInfo instanceof PendingAddWidgetInfo) {
PendingAddWidgetInfo createWidgetInfo = (PendingAddWidgetInfo) mAddInfo;
int maxWidth = Math.min((int) (previewBitmapWidth * MAX_WIDGET_SCALE), mEstimatedCellSize[0]);
int[] previewSizeBeforeScale = new int[1];
if (mRemoteViewsPreview != null) {
mAppWidgetHostViewPreview = new LauncherAppWidgetHostView(launcher);
mAppWidgetHostViewPreview.setAppWidget(/* appWidgetId= */ -1,
((PendingAddWidgetInfo) mAddInfo).info);
DeviceProfile deviceProfile = launcher.getDeviceProfile();
Rect padding = new Rect();
mAppWidgetHostViewPreview.getWidgetInset(deviceProfile, padding);
mAppWidgetHostViewPreview.setPadding(padding.left, padding.top, padding.right,
padding.bottom);
mAppWidgetHostViewPreview.updateAppWidget(/* remoteViews= */ mRemoteViewsPreview);
Size widgetSizes = WidgetSizes.getWidgetPaddedSizePx(launcher,
mAddInfo.componentName, deviceProfile, mAddInfo.spanX, mAddInfo.spanY);
mAppWidgetHostViewPreview.measure(
MeasureSpec.makeMeasureSpec(widgetSizes.getWidth(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(widgetSizes.getHeight(), MeasureSpec.EXACTLY));
mAppWidgetHostViewPreview.setClipChildren(false);
mAppWidgetHostViewPreview.setClipToPadding(false);
mAppWidgetHostViewPreview.setScaleToFit(mRemoteViewsPreviewScale);
}
if (mAppWidgetHostViewPreview != null) {
previewSizeBeforeScale[0] = mAppWidgetHostViewPreview.getMeasuredWidth();
launcher.getDragController()
.addDragListener(new AppWidgetHostViewDragListener(launcher));
}
if (preview == null && mAppWidgetHostViewPreview == null) {
Drawable p = new FastBitmapDrawable(new DatabaseWidgetPreviewLoader(launcher)
.generateWidgetPreview(
createWidgetInfo.info, maxWidth, previewSizeBeforeScale));
if (RoundedCornerEnforcement.isRoundedCornerEnabled()) {
p = new RoundDrawableWrapper(p, mEnforcedRoundedCornersForWidget);
}
preview = p;
}
if (previewSizeBeforeScale[0] < previewBitmapWidth) {
// The icon has extra padding around it.
int padding = (previewBitmapWidth - previewSizeBeforeScale[0]) / 2;
if (previewBitmapWidth > previewViewWidth) {
padding = padding * previewViewWidth / previewBitmapWidth;
}
previewBounds.left += padding;
previewBounds.right -= padding;
}
if (mAppWidgetHostViewPreview != null) {
previewWidth = mAppWidgetHostViewPreview.getMeasuredWidth();
previewHeight = mAppWidgetHostViewPreview.getMeasuredHeight();
} else {
previewWidth = preview.getIntrinsicWidth();
previewHeight = preview.getIntrinsicHeight();
}
scale = previewBounds.width() / (float) previewWidth;
launcher.getDragController().addDragListener(new WidgetHostViewLoader(launcher, mView));
dragOffset = null;
dragRegion = null;
draggableView = DraggableView.ofType(DraggableView.DRAGGABLE_WIDGET);
} else {
PendingAddShortcutInfo createShortcutInfo = (PendingAddShortcutInfo) mAddInfo;
Drawable icon = createShortcutInfo.activityInfo.getFullResIcon(app.getIconCache());
LauncherIcons li = LauncherIcons.obtain(launcher);
preview = new FastBitmapDrawable(
li.createScaledBitmapWithoutShadow(icon, 0));
previewWidth = preview.getIntrinsicWidth();
previewHeight = preview.getIntrinsicHeight();
li.recycle();
scale = ((float) launcher.getDeviceProfile().iconSizePx) / previewWidth;
dragOffset = new Point(previewPadding / 2, previewPadding / 2);
// Create a preview same as the workspace cell size and draw the icon at the
// appropriate position.
DeviceProfile dp = launcher.getDeviceProfile();
int iconSize = dp.iconSizePx;
int padding = launcher.getResources()
.getDimensionPixelSize(R.dimen.widget_preview_shortcut_padding);
previewBounds.left += padding;
previewBounds.top += padding;
dragRegion = new Rect();
dragRegion.left = (mEstimatedCellSize[0] - iconSize) / 2;
dragRegion.right = dragRegion.left + iconSize;
dragRegion.top = (mEstimatedCellSize[1]
- iconSize - dp.iconTextSizePx - dp.iconDrawablePaddingPx) / 2;
dragRegion.bottom = dragRegion.top + iconSize;
draggableView = DraggableView.ofType(DraggableView.DRAGGABLE_ICON);
}
int dragLayerX = screenPos.x + previewBounds.left
+ (int) ((scale * previewWidth - previewWidth) / 2);
int dragLayerY = screenPos.y + previewBounds.top
+ (int) ((scale * previewHeight - previewHeight) / 2);
// Start the drag
if (mAppWidgetHostViewPreview != null) {
launcher.getDragController().startDrag(mAppWidgetHostViewPreview, draggableView,
dragLayerX, dragLayerY, source, mAddInfo, dragOffset, dragRegion, scale, scale,
options);
} else {
launcher.getDragController().startDrag(preview, draggableView, dragLayerX, dragLayerY,
source, mAddInfo, dragOffset, dragRegion, scale, scale, options);
}
}
@Override
protected Bitmap convertPreviewToAlphaBitmap(Bitmap preview) {
if (mAddInfo instanceof PendingAddShortcutInfo || mEstimatedCellSize == null) {
return super.convertPreviewToAlphaBitmap(preview);
}
int w = mEstimatedCellSize[0];
int h = mEstimatedCellSize[1];
final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ALPHA_8);
Rect src = new Rect(0, 0, preview.getWidth(), preview.getHeight());
float scaleFactor = Math.min((w - blurSizeOutline) / (float) preview.getWidth(),
(h - blurSizeOutline) / (float) preview.getHeight());
int scaledWidth = (int) (scaleFactor * preview.getWidth());
int scaledHeight = (int) (scaleFactor * preview.getHeight());
Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);
// center the image
dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);
new Canvas(b).drawBitmap(preview, src, dst, new Paint(Paint.FILTER_BITMAP_FLAG));
return b;
}
}
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