core/java/com/android/internal/view/menu/ActionMenuView.java - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2010 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.internal.view.menu;

 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.Gravity;
 import android.view.SoundEffectConstants;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewParent;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;

 import java.util.ArrayList;

 /**
  * @hide
  */
 public class ActionMenuView extends LinearLayout implements MenuBuilder.ItemInvoker, MenuView {
     private static final String TAG = "ActionMenuView";

     // TODO Theme/style this.
     private static final int DIVIDER_PADDING = 12; // dips

     private MenuBuilder mMenu;

     private int mMaxItems;
     private int mWidthLimit;
     private boolean mReserveOverflow;
     private OverflowMenuButton mOverflowButton;
     private MenuPopupHelper mOverflowPopup;

     private float mDividerPadding;

     private Drawable mDivider;

     private final Runnable mShowOverflow = new Runnable() {
         public void run() {
             showOverflowMenu();
         }
     };

     private class OpenOverflowRunnable implements Runnable {
         private MenuPopupHelper mPopup;

         public OpenOverflowRunnable(MenuPopupHelper popup) {
             mPopup = popup;
         }

         public void run() {
             if (mPopup.tryShow()) {
                 mOverflowPopup = mPopup;
                 mPostedOpenRunnable = null;
             }
         }
     }

     private OpenOverflowRunnable mPostedOpenRunnable;

     public ActionMenuView(Context context) {
         this(context, null);
     }

     public ActionMenuView(Context context, AttributeSet attrs) {
         super(context, attrs);

         final Resources res = getResources();

         // Measure for initial configuration
         mMaxItems = getMaxActionButtons();

         // TODO There has to be a better way to indicate that we don't have a hard menu key.
         final int screen = res.getConfiguration().screenLayout;
         mReserveOverflow = (screen & Configuration.SCREENLAYOUT_SIZE_MASK) ==
                 Configuration.SCREENLAYOUT_SIZE_XLARGE;
         mWidthLimit = res.getDisplayMetrics().widthPixels / 2;

         TypedArray a = context.obtainStyledAttributes(com.android.internal.R.styleable.Theme);
         mDivider = a.getDrawable(com.android.internal.R.styleable.Theme_dividerVertical);
         a.recycle();

         mDividerPadding = DIVIDER_PADDING * res.getDisplayMetrics().density;

         setBaselineAligned(false);
     }

     @Override
     public void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         final int screen = newConfig.screenLayout;
         mReserveOverflow = (screen & Configuration.SCREENLAYOUT_SIZE_MASK) ==
                 Configuration.SCREENLAYOUT_SIZE_XLARGE;
         mMaxItems = getMaxActionButtons();
         mWidthLimit = getResources().getDisplayMetrics().widthPixels / 2;
         if (mMenu != null) {
             mMenu.setMaxActionItems(mMaxItems);
             updateChildren(false);
         }

         if (mOverflowPopup != null && mOverflowPopup.isShowing()) {
             mOverflowPopup.dismiss();
             post(mShowOverflow);
         }
     }

     @Override
     public void onDetachedFromWindow() {
         super.onDetachedFromWindow();
         if (mOverflowPopup != null && mOverflowPopup.isShowing()) {
             mOverflowPopup.dismiss();
         }
         removeCallbacks(mShowOverflow);
         if (mPostedOpenRunnable != null) {
             removeCallbacks(mPostedOpenRunnable);
         }
     }

     private int getMaxActionButtons() {
         return getResources().getInteger(com.android.internal.R.integer.max_action_buttons);
     }

     public boolean isOverflowReserved() {
         return mReserveOverflow;
     }

     public void setOverflowReserved(boolean reserveOverflow) {
         mReserveOverflow = reserveOverflow;
     }

     public View getOverflowButton() {
         return mOverflowButton;
     }

     @Override
     protected LayoutParams generateDefaultLayoutParams() {
         LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
                 LayoutParams.WRAP_CONTENT);
         params.gravity = Gravity.CENTER_VERTICAL;
         return params;
     }

     @Override
     protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
         if (p instanceof LayoutParams) {
             LayoutParams result = new LayoutParams((LayoutParams) p);
             if (result.gravity <= Gravity.NO_GRAVITY) {
                 result.gravity = Gravity.CENTER_VERTICAL;
             }
             return result;
         }
         return generateDefaultLayoutParams();
     }

     public boolean invokeItem(MenuItemImpl item) {
         return mMenu.performItemAction(item, 0);
     }

     public int getWindowAnimations() {
         return 0;
     }

     public void initialize(MenuBuilder menu, int menuType) {
         int width = mWidthLimit;
         if (mReserveOverflow) {
             if (mOverflowButton == null) {
                 OverflowMenuButton button = new OverflowMenuButton(mContext);
                 mOverflowButton = button;
             }
             final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
             mOverflowButton.measure(spec, spec);
             width -= mOverflowButton.getMeasuredWidth();
         }

         menu.setActionWidthLimit(width);

         menu.setMaxActionItems(mMaxItems);
         mMenu = menu;
         updateChildren(true);
     }

     public void updateChildren(boolean cleared) {
         final boolean reserveOverflow = mReserveOverflow;
         removeAllViews();

         final ArrayList<MenuItemImpl> itemsToShow = mMenu.getActionItems(reserveOverflow);
         final int itemCount = itemsToShow.size();

         boolean needsDivider = false;
         for (int i = 0; i < itemCount; i++) {
             final MenuItemImpl itemData = itemsToShow.get(i);
             boolean hasDivider = false;

             if (needsDivider) {
                 addView(makeDividerView(), makeDividerLayoutParams());
                 hasDivider = true;
             }

             View actionView = itemData.getActionView();

             if (actionView != null) {
                 final ViewParent parent = actionView.getParent();
                 if (parent instanceof ViewGroup) {
                     ((ViewGroup) parent).removeView(actionView);
                 }
                 addView(actionView, makeActionViewLayoutParams(actionView));
             } else {
                 ActionMenuItemView view = (ActionMenuItemView) itemData.getItemView(
                         MenuBuilder.TYPE_ACTION_BUTTON, this);
                 view.setItemInvoker(this);
                 if (i > 0 && !hasDivider && view.hasText() && itemData.getIcon() == null) {
                     addView(makeDividerView(), makeDividerLayoutParams());
                 }
                 addView(view);
                 needsDivider = view.hasText();
             }
         }

         if (reserveOverflow) {
             if (mMenu.getNonActionItems(true).size() > 0) {
                 if (itemCount > 0) {
                     addView(makeDividerView(), makeDividerLayoutParams());
                 }
                 if (mOverflowButton == null) {
                     OverflowMenuButton button = new OverflowMenuButton(mContext);
                     mOverflowButton = button;
                 }
                 addView(mOverflowButton);
             } else {
                 mOverflowButton = null;
             }
         }
     }

     public boolean showOverflowMenu() {
         if (mOverflowButton != null && !isOverflowMenuShowing()) {
             mMenu.getCallback().onMenuModeChange(mMenu);
             return true;
         }
         return false;
     }

     public void openOverflowMenu() {
         OverflowPopup popup = new OverflowPopup(getContext(), mMenu, mOverflowButton, true);
         mPostedOpenRunnable = new OpenOverflowRunnable(popup);
         // Post this for later; we might still need a layout for the anchor to be right.
         post(mPostedOpenRunnable);
     }

     public boolean isOverflowMenuShowing() {
         return mOverflowPopup != null && mOverflowPopup.isShowing();
     }

     public boolean isOverflowMenuOpen() {
         return mOverflowPopup != null;
     }

     public boolean hideOverflowMenu() {
         if (mPostedOpenRunnable != null) {
             removeCallbacks(mPostedOpenRunnable);
             return true;
         }

         MenuPopupHelper popup = mOverflowPopup;
         if (popup != null) {
             popup.dismiss();
             return true;
         }
         return false;
     }

     private boolean addItemView(boolean needsDivider, ActionMenuItemView view) {
         view.setItemInvoker(this);
         boolean hasText = view.hasText();

         if (hasText && needsDivider) {
             addView(makeDividerView(), makeDividerLayoutParams());
         }
         addView(view);
         return hasText;
     }

     private ImageView makeDividerView() {
         ImageView result = new ImageView(mContext);
         result.setImageDrawable(mDivider);
         result.setScaleType(ImageView.ScaleType.FIT_XY);
         return result;
     }

     private LayoutParams makeDividerLayoutParams() {
         LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
                 LayoutParams.MATCH_PARENT);
         params.topMargin = (int) mDividerPadding;
         params.bottomMargin = (int) mDividerPadding;
         return params;
     }

     private LayoutParams makeActionViewLayoutParams(View view) {
         return generateLayoutParams(view.getLayoutParams());
     }

     private class OverflowMenuButton extends ImageButton {
         public OverflowMenuButton(Context context) {
             super(context, null, com.android.internal.R.attr.actionOverflowButtonStyle);

             setClickable(true);
             setFocusable(true);
             setVisibility(VISIBLE);
             setEnabled(true);
         }

         @Override
         public boolean performClick() {
             if (super.performClick()) {
                 return true;
             }

             playSoundEffect(SoundEffectConstants.CLICK);
             showOverflowMenu();
             return true;
         }
     }

     private class OverflowPopup extends MenuPopupHelper {
         public OverflowPopup(Context context, MenuBuilder menu, View anchorView,
                 boolean overflowOnly) {
             super(context, menu, anchorView, overflowOnly);
         }

         @Override
         public void onDismiss() {
             super.onDismiss();
             mMenu.getCallback().onCloseMenu(mMenu, true);
             mOverflowPopup = null;
         }
     }
 }
	/*
	* Copyright (C) 2010 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.internal.view.menu;

	import android.content.Context;
	import android.content.res.Configuration;
	import android.content.res.Resources;
	import android.content.res.TypedArray;
	import android.graphics.drawable.Drawable;
	import android.util.AttributeSet;
	import android.view.Gravity;
	import android.view.SoundEffectConstants;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ViewParent;
	import android.widget.ImageButton;
	import android.widget.ImageView;
	import android.widget.LinearLayout;

	import java.util.ArrayList;

	/**
	* @hide
	*/
	public class ActionMenuView extends LinearLayout implements MenuBuilder.ItemInvoker, MenuView {
	private static final String TAG = "ActionMenuView";

	// TODO Theme/style this.
	private static final int DIVIDER_PADDING = 12; // dips

	private MenuBuilder mMenu;

	private int mMaxItems;
	private int mWidthLimit;
	private boolean mReserveOverflow;
	private OverflowMenuButton mOverflowButton;
	private MenuPopupHelper mOverflowPopup;

	private float mDividerPadding;

	private Drawable mDivider;

	private final Runnable mShowOverflow = new Runnable() {
	public void run() {
	showOverflowMenu();
	}
	};

	private class OpenOverflowRunnable implements Runnable {
	private MenuPopupHelper mPopup;

	public OpenOverflowRunnable(MenuPopupHelper popup) {
	mPopup = popup;
	}

	public void run() {
	if (mPopup.tryShow()) {
	mOverflowPopup = mPopup;
	mPostedOpenRunnable = null;
	}
	}
	}

	private OpenOverflowRunnable mPostedOpenRunnable;

	public ActionMenuView(Context context) {
	this(context, null);
	}

	public ActionMenuView(Context context, AttributeSet attrs) {
	super(context, attrs);

	final Resources res = getResources();

	// Measure for initial configuration
	mMaxItems = getMaxActionButtons();

	// TODO There has to be a better way to indicate that we don't have a hard menu key.
	final int screen = res.getConfiguration().screenLayout;
	mReserveOverflow = (screen & Configuration.SCREENLAYOUT_SIZE_MASK) ==
	Configuration.SCREENLAYOUT_SIZE_XLARGE;
	mWidthLimit = res.getDisplayMetrics().widthPixels / 2;

	TypedArray a = context.obtainStyledAttributes(com.android.internal.R.styleable.Theme);
	mDivider = a.getDrawable(com.android.internal.R.styleable.Theme_dividerVertical);
	a.recycle();

	mDividerPadding = DIVIDER_PADDING * res.getDisplayMetrics().density;

	setBaselineAligned(false);
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
	super.onConfigurationChanged(newConfig);
	final int screen = newConfig.screenLayout;
	mReserveOverflow = (screen & Configuration.SCREENLAYOUT_SIZE_MASK) ==
	Configuration.SCREENLAYOUT_SIZE_XLARGE;
	mMaxItems = getMaxActionButtons();
	mWidthLimit = getResources().getDisplayMetrics().widthPixels / 2;
	if (mMenu != null) {
	mMenu.setMaxActionItems(mMaxItems);
	updateChildren(false);
	}

	if (mOverflowPopup != null && mOverflowPopup.isShowing()) {
	mOverflowPopup.dismiss();
	post(mShowOverflow);
	}
	}

	@Override
	public void onDetachedFromWindow() {
	super.onDetachedFromWindow();
	if (mOverflowPopup != null && mOverflowPopup.isShowing()) {
	mOverflowPopup.dismiss();
	}
	removeCallbacks(mShowOverflow);
	if (mPostedOpenRunnable != null) {
	removeCallbacks(mPostedOpenRunnable);
	}
	}

	private int getMaxActionButtons() {
	return getResources().getInteger(com.android.internal.R.integer.max_action_buttons);
	}

	public boolean isOverflowReserved() {
	return mReserveOverflow;
	}

	public void setOverflowReserved(boolean reserveOverflow) {
	mReserveOverflow = reserveOverflow;
	}

	public View getOverflowButton() {
	return mOverflowButton;
	}

	@Override
	protected LayoutParams generateDefaultLayoutParams() {
	LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
	LayoutParams.WRAP_CONTENT);
	params.gravity = Gravity.CENTER_VERTICAL;
	return params;
	}

	@Override
	protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
	if (p instanceof LayoutParams) {
	LayoutParams result = new LayoutParams((LayoutParams) p);
	if (result.gravity <= Gravity.NO_GRAVITY) {
	result.gravity = Gravity.CENTER_VERTICAL;
	}
	return result;
	}
	return generateDefaultLayoutParams();
	}

	public boolean invokeItem(MenuItemImpl item) {
	return mMenu.performItemAction(item, 0);
	}

	public int getWindowAnimations() {
	return 0;
	}

	public void initialize(MenuBuilder menu, int menuType) {
	int width = mWidthLimit;
	if (mReserveOverflow) {
	if (mOverflowButton == null) {
	OverflowMenuButton button = new OverflowMenuButton(mContext);
	mOverflowButton = button;
	}
	final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
	mOverflowButton.measure(spec, spec);
	width -= mOverflowButton.getMeasuredWidth();
	}

	menu.setActionWidthLimit(width);

	menu.setMaxActionItems(mMaxItems);
	mMenu = menu;
	updateChildren(true);
	}

	public void updateChildren(boolean cleared) {
	final boolean reserveOverflow = mReserveOverflow;
	removeAllViews();

	final ArrayList<MenuItemImpl> itemsToShow = mMenu.getActionItems(reserveOverflow);
	final int itemCount = itemsToShow.size();

	boolean needsDivider = false;
	for (int i = 0; i < itemCount; i++) {
	final MenuItemImpl itemData = itemsToShow.get(i);
	boolean hasDivider = false;

	if (needsDivider) {
	addView(makeDividerView(), makeDividerLayoutParams());
	hasDivider = true;
	}

	View actionView = itemData.getActionView();

	if (actionView != null) {
	final ViewParent parent = actionView.getParent();
	if (parent instanceof ViewGroup) {
	((ViewGroup) parent).removeView(actionView);
	}
	addView(actionView, makeActionViewLayoutParams(actionView));
	} else {
	ActionMenuItemView view = (ActionMenuItemView) itemData.getItemView(
	MenuBuilder.TYPE_ACTION_BUTTON, this);
	view.setItemInvoker(this);
	if (i > 0 && !hasDivider && view.hasText() && itemData.getIcon() == null) {
	addView(makeDividerView(), makeDividerLayoutParams());
	}
	addView(view);
	needsDivider = view.hasText();
	}
	}

	if (reserveOverflow) {
	if (mMenu.getNonActionItems(true).size() > 0) {
	if (itemCount > 0) {
	addView(makeDividerView(), makeDividerLayoutParams());
	}
	if (mOverflowButton == null) {
	OverflowMenuButton button = new OverflowMenuButton(mContext);
	mOverflowButton = button;
	}
	addView(mOverflowButton);
	} else {
	mOverflowButton = null;
	}
	}
	}

	public boolean showOverflowMenu() {
	if (mOverflowButton != null && !isOverflowMenuShowing()) {
	mMenu.getCallback().onMenuModeChange(mMenu);
	return true;
	}
	return false;
	}

	public void openOverflowMenu() {
	OverflowPopup popup = new OverflowPopup(getContext(), mMenu, mOverflowButton, true);
	mPostedOpenRunnable = new OpenOverflowRunnable(popup);
	// Post this for later; we might still need a layout for the anchor to be right.
	post(mPostedOpenRunnable);
	}

	public boolean isOverflowMenuShowing() {
	return mOverflowPopup != null && mOverflowPopup.isShowing();
	}

	public boolean isOverflowMenuOpen() {
	return mOverflowPopup != null;
	}

	public boolean hideOverflowMenu() {
	if (mPostedOpenRunnable != null) {
	removeCallbacks(mPostedOpenRunnable);
	return true;
	}

	MenuPopupHelper popup = mOverflowPopup;
	if (popup != null) {
	popup.dismiss();
	return true;
	}
	return false;
	}

	private boolean addItemView(boolean needsDivider, ActionMenuItemView view) {
	view.setItemInvoker(this);
	boolean hasText = view.hasText();

	if (hasText && needsDivider) {
	addView(makeDividerView(), makeDividerLayoutParams());
	}
	addView(view);
	return hasText;
	}

	private ImageView makeDividerView() {
	ImageView result = new ImageView(mContext);
	result.setImageDrawable(mDivider);
	result.setScaleType(ImageView.ScaleType.FIT_XY);
	return result;
	}

	private LayoutParams makeDividerLayoutParams() {
	LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
	LayoutParams.MATCH_PARENT);
	params.topMargin = (int) mDividerPadding;
	params.bottomMargin = (int) mDividerPadding;
	return params;
	}

	private LayoutParams makeActionViewLayoutParams(View view) {
	return generateLayoutParams(view.getLayoutParams());
	}

	private class OverflowMenuButton extends ImageButton {
	public OverflowMenuButton(Context context) {
	super(context, null, com.android.internal.R.attr.actionOverflowButtonStyle);

	setClickable(true);
	setFocusable(true);
	setVisibility(VISIBLE);
	setEnabled(true);
	}

	@Override
	public boolean performClick() {
	if (super.performClick()) {
	return true;
	}

	playSoundEffect(SoundEffectConstants.CLICK);
	showOverflowMenu();
	return true;
	}
	}

	private class OverflowPopup extends MenuPopupHelper {
	public OverflowPopup(Context context, MenuBuilder menu, View anchorView,
	boolean overflowOnly) {
	super(context, menu, anchorView, overflowOnly);
	}

	@Override
	public void onDismiss() {
	super.onDismiss();
	mMenu.getCallback().onCloseMenu(mMenu, true);
	mOverflowPopup = null;
	}
	}
	}