| /* |
| * 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 android.widget; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.accessibility.AccessibilityManager; |
| |
| /** |
| * A MenuPopupWindow represents the popup window for menu. |
| * |
| * MenuPopupWindow is mostly same as ListPopupWindow, but it has customized |
| * behaviors specific to menus, |
| * |
| * @hide |
| */ |
| public class MenuPopupWindow extends ListPopupWindow { |
| public MenuPopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| @Override |
| DropDownListView createDropDownListView(Context context, boolean hijackFocus) { |
| return new MenuDropDownListView(context, hijackFocus); |
| } |
| |
| static class MenuDropDownListView extends DropDownListView { |
| private boolean mHoveredOnDisabledItem = false; |
| private AccessibilityManager mAccessibilityManager; |
| |
| MenuDropDownListView(Context context, boolean hijackFocus) { |
| super(context, hijackFocus); |
| mAccessibilityManager = (AccessibilityManager) getContext().getSystemService( |
| Context.ACCESSIBILITY_SERVICE); |
| } |
| |
| @Override |
| protected boolean shouldShowSelector() { |
| return (isHovered() && !mHoveredOnDisabledItem) || super.shouldShowSelector(); |
| } |
| |
| @Override |
| public boolean onHoverEvent(MotionEvent ev) { |
| mHoveredOnDisabledItem = false; |
| |
| // Accessibility system should already handle hover events and selections, menu does |
| // not have to handle it by itself. |
| if (mAccessibilityManager.isTouchExplorationEnabled()) { |
| return super.onHoverEvent(ev); |
| } |
| |
| final int action = ev.getActionMasked(); |
| if (action == MotionEvent.ACTION_HOVER_ENTER |
| || action == MotionEvent.ACTION_HOVER_MOVE) { |
| final int position = pointToPosition((int) ev.getX(), (int) ev.getY()); |
| if (position != INVALID_POSITION && position != mSelectedPosition) { |
| final View hoveredItem = getChildAt(position - getFirstVisiblePosition()); |
| if (hoveredItem.isEnabled()) { |
| positionSelector(position, hoveredItem); |
| setSelectedPositionInt(position); |
| } else { |
| mHoveredOnDisabledItem = true; |
| } |
| updateSelectorState(); |
| } |
| } else { |
| // Do not cancel the selected position if the selection is visible by other reasons. |
| if (!super.shouldShowSelector()) { |
| setSelectedPositionInt(INVALID_POSITION); |
| } |
| } |
| return super.onHoverEvent(ev); |
| } |
| } |
| } |