diff options
Diffstat (limited to 'src/com/android/launcher3/widget/WidgetsContainerView.java')
| -rw-r--r-- | src/com/android/launcher3/widget/WidgetsContainerView.java | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/src/com/android/launcher3/widget/WidgetsContainerView.java b/src/com/android/launcher3/widget/WidgetsContainerView.java new file mode 100644 index 000000000..6580ab4ff --- /dev/null +++ b/src/com/android/launcher3/widget/WidgetsContainerView.java @@ -0,0 +1,376 @@ +/* + * 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.widget; + +import android.content.Context; +import android.content.pm.PackageManager; +import android.graphics.Bitmap; +import android.graphics.Point; +import android.graphics.Rect; +import android.graphics.drawable.Drawable; +import android.support.v7.widget.LinearLayoutManager; +import android.support.v7.widget.RecyclerView; +import android.util.AttributeSet; +import android.util.Log; +import android.view.MotionEvent; +import android.view.View; +import android.widget.FrameLayout; +import android.widget.ImageView; + +import com.android.launcher3.CellLayout; +import com.android.launcher3.DeleteDropTarget; +import com.android.launcher3.DragController; +import com.android.launcher3.DragSource; +import com.android.launcher3.DropTarget.DragObject; +import com.android.launcher3.FastBitmapDrawable; +import com.android.launcher3.Folder; +import com.android.launcher3.IconCache; +import com.android.launcher3.Insettable; +import com.android.launcher3.ItemInfo; +import com.android.launcher3.Launcher; +import com.android.launcher3.LauncherAppState; +import com.android.launcher3.PendingAddItemInfo; +import com.android.launcher3.R; +import com.android.launcher3.Utilities; +import com.android.launcher3.WidgetPreviewLoader; +import com.android.launcher3.Workspace; + +import java.util.ArrayList; + +/** + * The widgets list view container. + */ +public class WidgetsContainerView extends FrameLayout implements Insettable, View.OnTouchListener, + View.OnLongClickListener, DragSource{ + + private static final String TAG = "WidgetContainerView"; + private static final boolean DEBUG = false; + + /* {@link RecyclerView} will keep following # of views in cache, before recycling. */ + private static final int WIDGET_CACHE_SIZE = 2; + + /* Global instances that are used inside this container. */ + private Launcher mLauncher; + private DragController mDragController; + private IconCache mIconCache; + + /* Data model for the widget */ + private WidgetsModel mWidgets; + + /* Recycler view related member variables */ + private RecyclerView mView; + private WidgetsListAdapter mAdapter; + + /* Dragging related. */ + private boolean mDraggingWidget = false; // TODO(hyunyoungs): seems not needed? check! + private Point mLastTouchDownPos = new Point(); + + /* Rendering related. */ + private WidgetPreviewLoader mWidgetPreviewLoader; + private Rect mPadding = new Rect(); + + public WidgetsContainerView(Context context) { + this(context, null); + } + + public WidgetsContainerView(Context context, AttributeSet attrs) { + this(context, attrs, 0); + } + + public WidgetsContainerView(Context context, AttributeSet attrs, int defStyleAttr) { + this(context, attrs, defStyleAttr, 0); + } + + public WidgetsContainerView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { + super(context, attrs, defStyleAttr); + mLauncher = (Launcher) context; + mDragController = mLauncher.getDragController(); + + mAdapter = new WidgetsListAdapter(context, this, mLauncher, this, mLauncher); + mWidgets = new WidgetsModel(context, mAdapter); + mAdapter.setWidgetsModel(mWidgets); + mIconCache = (LauncherAppState.getInstance()).getIconCache(); + + if (DEBUG) { + Log.d(TAG, "WidgetsContainerView constructor"); + } + } + + @Override + protected void onFinishInflate() { + if (DEBUG) { + Log.d(TAG, String.format("onFinishInflate [widgets size=%d]", + mWidgets.getPackageSize())); + } + mView = (RecyclerView) findViewById(R.id.widgets_list_view); + mView.setAdapter(mAdapter); + mView.setLayoutManager(new LinearLayoutManager(getContext())); + mView.setItemViewCacheSize(WIDGET_CACHE_SIZE); + + mPadding.set(getPaddingLeft(), getPaddingTop(), getPaddingRight(), + getPaddingBottom()); + } + + // + // Returns views used for launcher transitions. + // + + public View getContentView() { + return findViewById(R.id.widgets_list_view); + } + + public View getRevealView() { + // TODO(hyunyoungs): temporarily use apps view transition. + return findViewById(R.id.widgets_reveal_view); + } + + public void scrollToTop() { + mView.scrollToPosition(0); + if (DEBUG) { + Log.d(TAG, String.format("scrollToTop, [widgets size=%d]", + mWidgets.getPackageSize())); + } + } + + // + // Touch related handling. + // + + @Override + public boolean onLongClick(View v) { + if (DEBUG) { + Log.d(TAG, String.format("onLonglick [v=%s]", v)); + } + + // Return early if this is not initiated from a touch + if (!v.isInTouchMode()) return false; + // When we have exited all apps or are in transition, disregard long clicks + if (!mLauncher.isWidgetsViewVisible() || + mLauncher.getWorkspace().isSwitchingState()) return false; + // Return if global dragging is not enabled + Log.d(TAG, String.format("onLonglick dragging enabled?.", v)); + if (!mLauncher.isDraggingEnabled()) return false; + + return beginDragging(v); + } + + private boolean beginDragging(View v) { + if (v instanceof WidgetCell) { + if (!beginDraggingWidget((WidgetCell) v)) { + return false; + } + } else { + Log.e(TAG, "Unexpected dragging view: " + v); + } + + // We delay entering spring-loaded mode slightly to make sure the UI + // thready is free of any work. + postDelayed(new Runnable() { + @Override + public void run() { + // We don't enter spring-loaded mode if the drag has been cancelled + if (mLauncher.getDragController().isDragging()) { + // Go into spring loaded mode (must happen before we startDrag()) + mLauncher.enterSpringLoadedDragMode(); + } + } + }, 150); + + return true; + } + + private boolean beginDraggingWidget(WidgetCell v) { + mDraggingWidget = true; + // Get the widget preview as the drag representation + ImageView image = (ImageView) v.findViewById(R.id.widget_preview); + PendingAddItemInfo createItemInfo = (PendingAddItemInfo) v.getTag(); + + // If the ImageView doesn't have a drawable yet, the widget preview hasn't been loaded and + // we abort the drag. + if (image.getDrawable() == null) { + mDraggingWidget = false; + return false; + } + + // Compose the drag image + Bitmap preview; + Bitmap outline; + float scale = 1f; + Point previewPadding = null; + + if (createItemInfo instanceof PendingAddWidgetInfo) { + // This can happen in some weird cases involving multi-touch. We can't start dragging + // the widget if this is null, so we break out. + + PendingAddWidgetInfo createWidgetInfo = (PendingAddWidgetInfo) createItemInfo; + int[] size = mLauncher.getWorkspace().estimateItemSize(createWidgetInfo, true); + + FastBitmapDrawable previewDrawable = (FastBitmapDrawable) image.getDrawable(); + float minScale = 1.25f; + int maxWidth = Math.min((int) (previewDrawable.getIntrinsicWidth() * minScale), size[0]); + + int[] previewSizeBeforeScale = new int[1]; + preview = getWidgetPreviewLoader().generateWidgetPreview(createWidgetInfo.info, + maxWidth, null, previewSizeBeforeScale); + // Compare the size of the drag preview to the preview in the AppsCustomize tray + int previewWidthInAppsCustomize = Math.min(previewSizeBeforeScale[0], + v.getActualItemWidth()); + scale = previewWidthInAppsCustomize / (float) preview.getWidth(); + + // The bitmap in the AppsCustomize tray is always the the same size, so there + // might be extra pixels around the preview itself - this accounts for that + if (previewWidthInAppsCustomize < previewDrawable.getIntrinsicWidth()) { + int padding = + (previewDrawable.getIntrinsicWidth() - previewWidthInAppsCustomize) / 2; + previewPadding = new Point(padding, 0); + } + } else { + PendingAddShortcutInfo createShortcutInfo = (PendingAddShortcutInfo) v.getTag(); + Drawable icon = mIconCache.getFullResIcon(createShortcutInfo.activityInfo); + preview = Utilities.createIconBitmap(icon, mLauncher); + createItemInfo.spanX = createItemInfo.spanY = 1; + } + + // Don't clip alpha values for the drag outline if we're using the default widget preview + boolean clipAlpha = !(createItemInfo instanceof PendingAddWidgetInfo && + (((PendingAddWidgetInfo) createItemInfo).previewImage == 0)); + + // Save the preview for the outline generation, then dim the preview + outline = Bitmap.createScaledBitmap(preview, preview.getWidth(), preview.getHeight(), + false); + + // Start the drag + mLauncher.lockScreenOrientation(); + mLauncher.getWorkspace().onDragStartedWithItem(createItemInfo, outline, clipAlpha); + mDragController.startDrag(image, preview, this, createItemInfo, + DragController.DRAG_ACTION_COPY, previewPadding, scale); + outline.recycle(); + preview.recycle(); + return true; + } + + /* + * @see android.view.View.OnTouchListener#onTouch(android.view.View, android.view.MotionEvent) + */ + @Override + public boolean onTouch(View v, MotionEvent ev) { + Log.d(TAG, String.format("onTouch [MotionEvent=%s]", ev)); + if (ev.getAction() == MotionEvent.ACTION_DOWN || + ev.getAction() == MotionEvent.ACTION_MOVE) { + mLastTouchDownPos.set((int) ev.getX(), (int) ev.getY()); + } + return false; + } + + // + // Drag related handling methods that implement {@link DragSource} interface. + // + + @Override + public boolean supportsFlingToDelete() { + return false; + } + + @Override + public boolean supportsAppInfoDropTarget() { + return true; + } + + /* + * Both this method and {@link #supportsFlingToDelete} has to return {@code false} for the + * {@link DeleteDropTarget} to be invisible.) + */ + @Override + public boolean supportsDeleteDropTarget() { + return false; + } + + @Override + public float getIntrinsicIconScaleFactor() { + return 0; + } + + @Override + public void onFlingToDeleteCompleted() { + // We just dismiss the drag when we fling, so cleanup here + mLauncher.exitSpringLoadedDragModeDelayed(true, + Launcher.EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT, null); + mLauncher.unlockScreenOrientation(false); + } + + @Override + public void onDropCompleted(View target, DragObject d, boolean isFlingToDelete, + boolean success) { + if (isFlingToDelete || !success || (target != mLauncher.getWorkspace() && + !(target instanceof DeleteDropTarget) && !(target instanceof Folder))) { + // Exit spring loaded mode if we have not successfully dropped or have not handled the + // drop in Workspace + mLauncher.exitSpringLoadedDragModeDelayed(true, + Launcher.EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT, null); + } + mLauncher.unlockScreenOrientation(false); + + // Display an error message if the drag failed due to there not being enough space on the + // target layout we were dropping on. + if (!success) { + boolean showOutOfSpaceMessage = false; + if (target instanceof Workspace) { + int currentScreen = mLauncher.getCurrentWorkspaceScreen(); + Workspace workspace = (Workspace) target; + CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen); + ItemInfo itemInfo = (ItemInfo) d.dragInfo; + if (layout != null) { + layout.calculateSpans(itemInfo); + showOutOfSpaceMessage = + !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY); + } + } + if (showOutOfSpaceMessage) { + mLauncher.showOutOfSpaceMessage(false); + } + d.deferDragViewCleanupPostAnimation = false; + } + } + + // + // Container rendering related. + // + + /* + * @see Insettable#setInsets(Rect) + */ + @Override + public void setInsets(Rect insets) { + setPadding(mPadding.left + insets.left, mPadding.top + insets.top, + mPadding.right + insets.right, mPadding.bottom + insets.bottom); + } + + /** + * Initialize the widget data model. + */ + public void addWidgets(ArrayList<Object> widgetsShortcuts, PackageManager pm) { + mWidgets.addWidgetsAndShortcuts(widgetsShortcuts, pm); + } + + private WidgetPreviewLoader getWidgetPreviewLoader() { + if (mWidgetPreviewLoader == null) { + mWidgetPreviewLoader = LauncherAppState.getInstance().getWidgetCache(); + } + return mWidgetPreviewLoader; + } + +}
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