Add arrow key navigation support to Grid-based Recents. (514bbfd8) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java

+8 −7

Original line number	Diff line number	Diff line
		@@ -74,6 +74,8 @@ import com.android.systemui.recents.events.ui.UserInteractionEvent;
		import com.android.systemui.recents.events.ui.focus.DismissFocusedTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.FocusNextTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.FocusPreviousTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.NavigateTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.NavigateTaskViewEvent.Direction;
		import com.android.systemui.recents.misc.DozeTrigger;
		import com.android.systemui.recents.misc.SystemServicesProxy;
		import com.android.systemui.recents.misc.Utilities;
		@@ -592,13 +594,12 @@ public class RecentsActivity extends Activity implements ViewTreeObserver.OnPreD
		}
		return true;
		}
		case KeyEvent.KEYCODE_DPAD_UP: {
		EventBus.getDefault().send(
		new FocusNextTaskViewEvent(0 /* timerIndicatorDuration */));
		return true;
		}
		case KeyEvent.KEYCODE_DPAD_DOWN: {
		EventBus.getDefault().send(new FocusPreviousTaskViewEvent());
		case KeyEvent.KEYCODE_DPAD_UP:
		case KeyEvent.KEYCODE_DPAD_DOWN:
		case KeyEvent.KEYCODE_DPAD_LEFT:
		case KeyEvent.KEYCODE_DPAD_RIGHT: {
		final Direction direction = NavigateTaskViewEvent.getDirectionFromKeyCode(keyCode);
		EventBus.getDefault().send(new NavigateTaskViewEvent(direction));
		return true;
		}
		case KeyEvent.KEYCODE_DEL:

packages/SystemUI/src/com/android/systemui/recents/events/ui/focus/NavigateTaskViewEvent.java

0 → 100644

+49 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2017 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.systemui.recents.events.ui.focus;

		import android.view.KeyEvent;
		import com.android.systemui.recents.events.EventBus;

		/**
		* Navigates the task view by arrow keys.
		*/
		public class NavigateTaskViewEvent extends EventBus.Event {
		public enum Direction {
		UNDEFINED, UP, DOWN, LEFT, RIGHT;
		}

		public Direction direction;
		public NavigateTaskViewEvent(Direction direction) {
		this.direction = direction;
		}

		public static Direction getDirectionFromKeyCode(int keyCode) {
		switch (keyCode) {
		case KeyEvent.KEYCODE_DPAD_UP:
		return Direction.UP;
		case KeyEvent.KEYCODE_DPAD_DOWN:
		return Direction.DOWN;
		case KeyEvent.KEYCODE_DPAD_LEFT:
		return Direction.LEFT;
		case KeyEvent.KEYCODE_DPAD_RIGHT:
		return Direction.RIGHT;
		default:
		return Direction.UNDEFINED;
		}
		}
		}

packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java

+21 −0

Original line number	Diff line number	Diff line
		@@ -87,6 +87,7 @@ import com.android.systemui.recents.events.ui.dragndrop.DragStartInitializeDropT
		import com.android.systemui.recents.events.ui.focus.DismissFocusedTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.FocusNextTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.FocusPreviousTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.NavigateTaskViewEvent;
		import com.android.systemui.recents.misc.DozeTrigger;
		import com.android.systemui.recents.misc.SystemServicesProxy;
		import com.android.systemui.recents.misc.Utilities;
		@@ -1869,6 +1870,26 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal
		setRelativeFocusedTask(false, false /* stackTasksOnly /, true / animated */);
		}

		public final void onBusEvent(NavigateTaskViewEvent event) {
		if (useGridLayout()) {
		final int taskCount = mStack.getTaskCount();
		final int currentIndex = mStack.indexOfStackTask(getFocusedTask());
		final int nextIndex = mLayoutAlgorithm.mTaskGridLayoutAlgorithm.navigateFocus(taskCount,
		currentIndex, event.direction);
		setFocusedTask(nextIndex, false, true);
		} else {
		switch (event.direction) {
		case UP:
		EventBus.getDefault().send(new FocusPreviousTaskViewEvent());
		break;
		case DOWN:
		EventBus.getDefault().send(
		new FocusNextTaskViewEvent(0 /* timerIndicatorDuration */));
		break;
		}
		}
		}

		public final void onBusEvent(UserInteractionEvent event) {
		// Poke the doze trigger on user interaction
		mUIDozeTrigger.poke();

packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java

+48 −2

Original line number	Diff line number	Diff line
		@@ -23,6 +23,8 @@ import android.graphics.Rect;
		import android.view.WindowManager;

		import com.android.systemui.R;
		import com.android.systemui.recents.events.ui.focus.NavigateTaskViewEvent;
		import com.android.systemui.recents.events.ui.focus.NavigateTaskViewEvent.Direction;
		import com.android.systemui.recents.misc.Utilities;
		import com.android.systemui.recents.views.TaskStackLayoutAlgorithm;
		import com.android.systemui.recents.views.TaskViewTransform;
		@@ -63,6 +65,8 @@ public class TaskGridLayoutAlgorithm {
		Rect size;
		int[] xOffsets;
		int[] yOffsets;
		int tasksPerLine;
		int lines;

		TaskGridRectInfo(int taskCount) {
		size = new Rect();
		@@ -71,10 +75,10 @@ public class TaskGridLayoutAlgorithm {

		int layoutTaskCount = Math.min(MAX_LAYOUT_TASK_COUNT, taskCount);

		int tasksPerLine = layoutTaskCount < 2 ? 1 : (
		tasksPerLine = layoutTaskCount < 2 ? 1 : (
		layoutTaskCount < 5 ? 2 : (
		layoutTaskCount < 7 ? 3 : 4));
		int lines = layoutTaskCount < 3 ? 1 : 2;
		lines = layoutTaskCount < 3 ? 1 : 2;

		// A couple of special cases.
		boolean landscapeWindow = mWindowRect.width() > mWindowRect.height();
		@@ -200,6 +204,48 @@ public class TaskGridLayoutAlgorithm {
		return transformOut;
		}

		/**
		* Return the proper task index to focus for arrow key navigation.
		* @param taskCount The amount of tasks.
		* @param currentFocusedIndex The index of the currently focused task.
		* @param direction The direction we're navigating.
		* @return The index of the task that should get the focus.
		*/
		public int navigateFocus(int taskCount, int currentFocusedIndex, Direction direction) {
		if (taskCount < 1 \|\| taskCount > MAX_LAYOUT_TASK_COUNT) {
		return -1;
		}
		if (currentFocusedIndex == -1) {
		return 0;
		}
		int newIndex = currentFocusedIndex;
		final TaskGridRectInfo gridInfo = mTaskGridRectInfoList[taskCount - 1];
		final int currentLine = (taskCount - 1 - currentFocusedIndex) / gridInfo.tasksPerLine;
		switch (direction) {
		case UP:
		newIndex += gridInfo.tasksPerLine;
		newIndex = newIndex >= taskCount ? currentFocusedIndex : newIndex;
		break;
		case DOWN:
		newIndex -= gridInfo.tasksPerLine;
		newIndex = newIndex < 0 ? currentFocusedIndex : newIndex;
		break;
		case LEFT:
		newIndex++;
		final int leftMostIndex = (taskCount - 1) - currentLine * gridInfo.tasksPerLine;
		newIndex = newIndex > leftMostIndex ? currentFocusedIndex : newIndex;
		break;
		case RIGHT:
		newIndex--;
		int rightMostIndex =
		(taskCount - 1) - (currentLine + 1) * gridInfo.tasksPerLine + 1;
		rightMostIndex = rightMostIndex < 0 ? 0 : rightMostIndex;
		newIndex = newIndex < rightMostIndex ? currentFocusedIndex : newIndex;
		break;
		}
		return newIndex;
		}

		public void initialize(Rect windowRect) {
		mWindowRect = windowRect;
		// Define paddings in terms of percentage of the total area.