| /* |
| * Copyright (C) 2013 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.keyguard; |
| |
| import android.content.Context; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.accessibility.AccessibilityManager; |
| |
| /** |
| * Hover listener that implements lift-to-activate interaction for |
| * accessibility. May be added to multiple views. |
| */ |
| class LiftToActivateListener implements View.OnHoverListener { |
| /** Manager used to query accessibility enabled state. */ |
| private final AccessibilityManager mAccessibilityManager; |
| |
| private boolean mCachedClickableState; |
| |
| public LiftToActivateListener(Context context) { |
| mAccessibilityManager = (AccessibilityManager) context.getSystemService( |
| Context.ACCESSIBILITY_SERVICE); |
| } |
| |
| @Override |
| public boolean onHover(View v, MotionEvent event) { |
| // When touch exploration is turned on, lifting a finger while |
| // inside the view bounds should perform a click action. |
| if (mAccessibilityManager.isEnabled() |
| && mAccessibilityManager.isTouchExplorationEnabled()) { |
| switch (event.getActionMasked()) { |
| case MotionEvent.ACTION_HOVER_ENTER: |
| // Lift-to-type temporarily disables double-tap |
| // activation by setting the view as not clickable. |
| mCachedClickableState = v.isClickable(); |
| v.setClickable(false); |
| break; |
| case MotionEvent.ACTION_HOVER_EXIT: |
| final int x = (int) event.getX(); |
| final int y = (int) event.getY(); |
| if ((x > v.getPaddingLeft()) && (y > v.getPaddingTop()) |
| && (x < v.getWidth() - v.getPaddingRight()) |
| && (y < v.getHeight() - v.getPaddingBottom())) { |
| v.performClick(); |
| } |
| v.setClickable(mCachedClickableState); |
| break; |
| } |
| } |
| |
| // Pass the event to View.onHoverEvent() to handle accessibility. |
| v.onHoverEvent(event); |
| |
| // Consume the event so it doesn't fall through to other views. |
| return true; |
| } |
| } |