diff options
Diffstat (limited to 'src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java')
-rw-r--r-- | src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java new file mode 100644 index 000000000..c5b52de72 --- /dev/null +++ b/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java @@ -0,0 +1,95 @@ +/* + * 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.accessibility; + +import android.annotation.TargetApi; +import android.content.Context; +import android.os.Build; +import android.os.Bundle; +import android.util.SparseArray; +import android.view.View; +import android.view.View.AccessibilityDelegate; +import android.view.accessibility.AccessibilityNodeInfo; +import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; +import com.android.launcher3.R; +import com.android.launcher3.Utilities; +import com.android.launcher3.Workspace; + +@TargetApi(Build.VERSION_CODES.LOLLIPOP) +public class OverviewScreenAccessibilityDelegate extends AccessibilityDelegate { + + private static final int MOVE_BACKWARD = R.id.action_move_screen_backwards; + private static final int MOVE_FORWARD = R.id.action_move_screen_forwards; + + private final SparseArray<AccessibilityAction> mActions = new SparseArray<>(); + private final Workspace mWorkspace; + + public OverviewScreenAccessibilityDelegate(Workspace workspace) { + mWorkspace = workspace; + + Context context = mWorkspace.getContext(); + boolean isRtl = Utilities.isRtl(context.getResources()); + mActions.put(MOVE_BACKWARD, new AccessibilityAction(MOVE_BACKWARD, + context.getText(isRtl ? R.string.action_move_screen_right : + R.string.action_move_screen_left))); + mActions.put(MOVE_FORWARD, new AccessibilityAction(MOVE_FORWARD, + context.getText(isRtl ? R.string.action_move_screen_left : + R.string.action_move_screen_right))); + } + + @Override + public boolean performAccessibilityAction(View host, int action, Bundle args) { + if (host != null) { + if (action == AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS ) { + int index = mWorkspace.indexOfChild(host); + mWorkspace.setCurrentPage(index); + } else if (action == MOVE_FORWARD) { + movePage(mWorkspace.indexOfChild(host) + 1, host); + return true; + } else if (action == MOVE_BACKWARD) { + movePage(mWorkspace.indexOfChild(host) - 1, host); + return true; + } + } + + return super.performAccessibilityAction(host, action, args); + } + + private void movePage(int finalIndex, View view) { + mWorkspace.onStartReordering(); + mWorkspace.removeView(view); + mWorkspace.addView(view, finalIndex); + mWorkspace.onEndReordering(); + mWorkspace.announceForAccessibility(mWorkspace.getContext().getText(R.string.screen_moved)); + + mWorkspace.updateAccessibilityFlags(); + view.performAccessibilityAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null); + } + + @Override + public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { + super.onInitializeAccessibilityNodeInfo(host, info); + + int index = mWorkspace.indexOfChild(host); + if (index < mWorkspace.getChildCount() - 1) { + info.addAction(mActions.get(MOVE_FORWARD)); + } + if (index > mWorkspace.numCustomPages()) { + info.addAction(mActions.get(MOVE_BACKWARD)); + } + } +} |