package android.widget;
import android.annotation.NonNull;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.transition.Transition;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import com.android.internal.view.menu.ListMenuItemView;
import com.android.internal.view.menu.MenuAdapter;
import com.android.internal.view.menu.MenuBuilder;
public class MenuPopupWindow extends ListPopupWindow implements MenuItemHoverListener {
private MenuItemHoverListener mHoverListener;
public MenuPopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
DropDownListView createDropDownListView(Context context, boolean hijackFocus) {
MenuDropDownListView view = new MenuDropDownListView(context, hijackFocus);
view.setHoverListener(this);
return view;
}
public void setEnterTransition(Transition enterTransition) {
mPopup.setEnterTransition(enterTransition);
}
public void setExitTransition(Transition exitTransition) {
mPopup.setExitTransition(exitTransition);
}
public void setHoverListener(MenuItemHoverListener hoverListener) {
mHoverListener = hoverListener;
}
public void setTouchModal(boolean touchModal) {
mPopup.setTouchModal(touchModal);
}
@Override
public void onItemHoverEnter(@NonNull MenuBuilder menu, @NonNull MenuItem item) {
if (mHoverListener != null) {
mHoverListener.onItemHoverEnter(menu, item);
}
}
@Override
public void onItemHoverExit(@NonNull MenuBuilder menu, @NonNull MenuItem item) {
if (mHoverListener != null) {
mHoverListener.onItemHoverExit(menu, item);
}
}
public static class MenuDropDownListView extends DropDownListView {
final int mAdvanceKey;
final int mRetreatKey;
private MenuItemHoverListener mHoverListener;
private MenuItem mHoveredMenuItem;
public MenuDropDownListView(Context context, boolean hijackFocus) {
super(context, hijackFocus);
final Resources res = context.getResources();
final Configuration config = res.getConfiguration();
if (config.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
mAdvanceKey = KeyEvent.KEYCODE_DPAD_LEFT;
mRetreatKey = KeyEvent.KEYCODE_DPAD_RIGHT;
} else {
mAdvanceKey = KeyEvent.KEYCODE_DPAD_RIGHT;
mRetreatKey = KeyEvent.KEYCODE_DPAD_LEFT;
}
}
public void setHoverListener(MenuItemHoverListener hoverListener) {
mHoverListener = hoverListener;
}
public void clearSelection() {
setSelectedPositionInt(INVALID_POSITION);
setNextSelectedPositionInt(INVALID_POSITION);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
ListMenuItemView selectedItem = (ListMenuItemView) getSelectedView();
if (selectedItem != null && keyCode == mAdvanceKey) {
if (selectedItem.isEnabled() && selectedItem.getItemData().hasSubMenu()) {
performItemClick(
selectedItem,
getSelectedItemPosition(),
getSelectedItemId());
}
return true;
} else if (selectedItem != null && keyCode == mRetreatKey) {
setSelectedPositionInt(INVALID_POSITION);
setNextSelectedPositionInt(INVALID_POSITION);
((MenuAdapter) getAdapter()).getAdapterMenu().close(false );
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onHoverEvent(MotionEvent ev) {
if (mHoverListener != null) {
final int headersCount;
final MenuAdapter menuAdapter;
final ListAdapter adapter = getAdapter();
if (adapter instanceof HeaderViewListAdapter) {
final HeaderViewListAdapter headerAdapter = (HeaderViewListAdapter) adapter;
headersCount = headerAdapter.getHeadersCount();
menuAdapter = (MenuAdapter) headerAdapter.getWrappedAdapter();
} else {
headersCount = 0;
menuAdapter = (MenuAdapter) adapter;
}
MenuItem menuItem = null;
if (ev.getAction() != MotionEvent.ACTION_HOVER_EXIT) {
final int position = pointToPosition((int) ev.getX(), (int) ev.getY());
if (position != INVALID_POSITION) {
final int itemPosition = position - headersCount;
if (itemPosition >= 0 && itemPosition < menuAdapter.getCount()) {
menuItem = menuAdapter.getItem(itemPosition);
}
}
}
final MenuItem oldMenuItem = mHoveredMenuItem;
if (oldMenuItem != menuItem) {
final MenuBuilder menu = menuAdapter.getAdapterMenu();
if (oldMenuItem != null) {
mHoverListener.onItemHoverExit(menu, oldMenuItem);
}
mHoveredMenuItem = menuItem;
if (menuItem != null) {
mHoverListener.onItemHoverEnter(menu, menuItem);
}
}
}
return super.onHoverEvent(ev);
}
}
}