1 files changed, 376 insertions, 0 deletions
diff --git a/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/view/menu/MenuPopupHelper.java b/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/view/menu/MenuPopupHelper.java
new file mode 100644
index 000000000..f030de310
--- /dev/null
+++ b/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/view/menu/MenuPopupHelper.java
@@ -0,0 +1,376 @@
+/*
+ * 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.actionbarsherlock.internal.view.menu;
+
+import java.util.ArrayList;
+import android.content.Context;
+import android.content.res.Resources;
+import android.database.DataSetObserver;
+import android.os.Parcelable;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.MeasureSpec;
+import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.FrameLayout;
+import android.widget.ListAdapter;
+import android.widget.PopupWindow;
+import com.actionbarsherlock.R;
+import com.actionbarsherlock.internal.view.View_HasStateListenerSupport;
+import com.actionbarsherlock.internal.view.View_OnAttachStateChangeListener;
+import com.actionbarsherlock.internal.widget.IcsListPopupWindow;
+import com.actionbarsherlock.view.MenuItem;
+
+/**
+ * Presents a menu as a small, simple popup anchored to another view.
+ * @hide
+ */
+public class MenuPopupHelper implements AdapterView.OnItemClickListener, View.OnKeyListener,
+        ViewTreeObserver.OnGlobalLayoutListener, PopupWindow.OnDismissListener,
+        View_OnAttachStateChangeListener, MenuPresenter {
+    //UNUSED private static final String TAG = "MenuPopupHelper";
+
+    static final int ITEM_LAYOUT = R.layout.abs__popup_menu_item_layout;
+
+    private Context mContext;
+    private LayoutInflater mInflater;
+    private IcsListPopupWindow mPopup;
+    private MenuBuilder mMenu;
+    private int mPopupMaxWidth;
+    private View mAnchorView;
+    private boolean mOverflowOnly;
+    private ViewTreeObserver mTreeObserver;
+
+    private MenuAdapter mAdapter;
+
+    private Callback mPresenterCallback;
+
+    boolean mForceShowIcon;
+
+    private ViewGroup mMeasureParent;
+
+    public MenuPopupHelper(Context context, MenuBuilder menu) {
+        this(context, menu, null, false);
+    }
+
+    public MenuPopupHelper(Context context, MenuBuilder menu, View anchorView) {
+        this(context, menu, anchorView, false);
+    }
+
+    public MenuPopupHelper(Context context, MenuBuilder menu,
+            View anchorView, boolean overflowOnly) {
+        mContext = context;
+        mInflater = LayoutInflater.from(context);
+        mMenu = menu;
+        mOverflowOnly = overflowOnly;
+
+        final Resources res = context.getResources();
+        mPopupMaxWidth = Math.max(res.getDisplayMetrics().widthPixels / 2,
+                res.getDimensionPixelSize(R.dimen.abs__config_prefDialogWidth));
+
+        mAnchorView = anchorView;
+
+        menu.addMenuPresenter(this);
+    }
+
+    public void setAnchorView(View anchor) {
+        mAnchorView = anchor;
+    }
+
+    public void setForceShowIcon(boolean forceShow) {
+        mForceShowIcon = forceShow;
+    }
+
+    public void show() {
+        if (!tryShow()) {
+            throw new IllegalStateException("MenuPopupHelper cannot be used without an anchor");
+        }
+    }
+
+    public boolean tryShow() {
+        mPopup = new IcsListPopupWindow(mContext, null, R.attr.popupMenuStyle);
+        mPopup.setOnDismissListener(this);
+        mPopup.setOnItemClickListener(this);
+
+        mAdapter = new MenuAdapter(mMenu);
+        mPopup.setAdapter(mAdapter);
+        mPopup.setModal(true);
+
+        View anchor = mAnchorView;
+        if (anchor != null) {
+            final boolean addGlobalListener = mTreeObserver == null;
+            mTreeObserver = anchor.getViewTreeObserver(); // Refresh to latest
+            if (addGlobalListener) mTreeObserver.addOnGlobalLayoutListener(this);
+            ((View_HasStateListenerSupport)anchor).addOnAttachStateChangeListener(this);
+            mPopup.setAnchorView(anchor);
+        } else {
+            return false;
+        }
+
+        mPopup.setContentWidth(Math.min(measureContentWidth(mAdapter), mPopupMaxWidth));
+        mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
+        mPopup.show();
+        mPopup.getListView().setOnKeyListener(this);
+        return true;
+    }
+
+    public void dismiss() {
+        if (isShowing()) {
+            mPopup.dismiss();
+        }
+    }
+
+    public void onDismiss() {
+        mPopup = null;
+        mMenu.close();
+        if (mTreeObserver != null) {
+            if (!mTreeObserver.isAlive()) mTreeObserver = mAnchorView.getViewTreeObserver();
+            mTreeObserver.removeGlobalOnLayoutListener(this);
+            mTreeObserver = null;
+        }
+        ((View_HasStateListenerSupport)mAnchorView).removeOnAttachStateChangeListener(this);
+    }
+
+    public boolean isShowing() {
+        return mPopup != null && mPopup.isShowing();
+    }
+
+    @Override
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+        MenuAdapter adapter = mAdapter;
+        adapter.mAdapterMenu.performItemAction(adapter.getItem(position), 0);
+    }
+
+    public boolean onKey(View v, int keyCode, KeyEvent event) {
+        if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_MENU) {
+            dismiss();
+            return true;
+        }
+        return false;
+    }
+
+    private int measureContentWidth(ListAdapter adapter) {
+        // Menus don't tend to be long, so this is more sane than it looks.
+        int width = 0;
+        View itemView = null;
+        int itemType = 0;
+        final int widthMeasureSpec =
+            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+        final int heightMeasureSpec =
+            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+        final int count = adapter.getCount();
+        for (int i = 0; i < count; i++) {
+            final int positionType = adapter.getItemViewType(i);
+            if (positionType != itemType) {
+                itemType = positionType;
+                itemView = null;
+            }
+            if (mMeasureParent == null) {
+                mMeasureParent = new FrameLayout(mContext);
+            }
+            itemView = adapter.getView(i, itemView, mMeasureParent);
+            itemView.measure(widthMeasureSpec, heightMeasureSpec);
+            width = Math.max(width, itemView.getMeasuredWidth());
+        }
+        return width;
+    }
+
+    @Override
+    public void onGlobalLayout() {
+        if (isShowing()) {
+            final View anchor = mAnchorView;
+            if (anchor == null || !anchor.isShown()) {
+                dismiss();
+            } else if (isShowing()) {
+                // Recompute window size and position
+                mPopup.show();
+            }
+        }
+    }
+
+    @Override
+    public void onViewAttachedToWindow(View v) {
+    }
+
+    @Override
+    public void onViewDetachedFromWindow(View v) {
+        if (mTreeObserver != null) {
+            if (!mTreeObserver.isAlive()) mTreeObserver = v.getViewTreeObserver();
+            mTreeObserver.removeGlobalOnLayoutListener(this);
+        }
+        ((View_HasStateListenerSupport)v).removeOnAttachStateChangeListener(this);
+    }
+
+    @Override
+    public void initForMenu(Context context, MenuBuilder menu) {
+        // Don't need to do anything; we added as a presenter in the constructor.
+    }
+
+    @Override
+    public MenuView getMenuView(ViewGroup root) {
+        throw new UnsupportedOperationException("MenuPopupHelpers manage their own views");
+    }
+
+    @Override
+    public void updateMenuView(boolean cleared) {
+        if (mAdapter != null) mAdapter.notifyDataSetChanged();
+    }
+
+    @Override
+    public void setCallback(Callback cb) {
+        mPresenterCallback = cb;
+    }
+
+    @Override
+    public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
+        if (subMenu.hasVisibleItems()) {
+            MenuPopupHelper subPopup = new MenuPopupHelper(mContext, subMenu, mAnchorView, false);
+            subPopup.setCallback(mPresenterCallback);
+
+            boolean preserveIconSpacing = false;
+            final int count = subMenu.size();
+            for (int i = 0; i < count; i++) {
+                MenuItem childItem = subMenu.getItem(i);
+                if (childItem.isVisible() && childItem.getIcon() != null) {
+                    preserveIconSpacing = true;
+                    break;
+                }
+            }
+            subPopup.setForceShowIcon(preserveIconSpacing);
+
+            if (subPopup.tryShow()) {
+                if (mPresenterCallback != null) {
+                    mPresenterCallback.onOpenSubMenu(subMenu);
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
+        // Only care about the (sub)menu we're presenting.
+        if (menu != mMenu) return;
+
+        dismiss();
+        if (mPresenterCallback != null) {
+            mPresenterCallback.onCloseMenu(menu, allMenusAreClosing);
+        }
+    }
+
+    @Override
+    public boolean flagActionItems() {
+        return false;
+    }
+
+    public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item) {
+        return false;
+    }
+
+    public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item) {
+        return false;
+    }
+
+    @Override
+    public int getId() {
+        return 0;
+    }
+
+    @Override
+    public Parcelable onSaveInstanceState() {
+        return null;
+    }
+
+    @Override
+    public void onRestoreInstanceState(Parcelable state) {
+    }
+
+    private class MenuAdapter extends BaseAdapter {
+        private MenuBuilder mAdapterMenu;
+        private int mExpandedIndex = -1;
+
+        public MenuAdapter(MenuBuilder menu) {
+            mAdapterMenu = menu;
+            registerDataSetObserver(new ExpandedIndexObserver());
+            findExpandedIndex();
+        }
+
+        public int getCount() {
+            ArrayList<MenuItemImpl> items = mOverflowOnly ?
+                    mAdapterMenu.getNonActionItems() : mAdapterMenu.getVisibleItems();
+            if (mExpandedIndex < 0) {
+                return items.size();
+            }
+            return items.size() - 1;
+        }
+
+        public MenuItemImpl getItem(int position) {
+            ArrayList<MenuItemImpl> items = mOverflowOnly ?
+                    mAdapterMenu.getNonActionItems() : mAdapterMenu.getVisibleItems();
+            if (mExpandedIndex >= 0 && position >= mExpandedIndex) {
+                position++;
+            }
+            return items.get(position);
+        }
+
+        public long getItemId(int position) {
+            // Since a menu item's ID is optional, we'll use the position as an
+            // ID for the item in the AdapterView
+            return position;
+        }
+
+        public View getView(int position, View convertView, ViewGroup parent) {
+            if (convertView == null) {
+                convertView = mInflater.inflate(ITEM_LAYOUT, parent, false);
+            }
+
+            MenuView.ItemView itemView = (MenuView.ItemView) convertView;
+            if (mForceShowIcon) {
+                ((ListMenuItemView) convertView).setForceShowIcon(true);
+            }
+            itemView.initialize(getItem(position), 0);
+            return convertView;
+        }
+
+        void findExpandedIndex() {
+            final MenuItemImpl expandedItem = mMenu.getExpandedItem();
+            if (expandedItem != null) {
+                final ArrayList<MenuItemImpl> items = mMenu.getNonActionItems();
+                final int count = items.size();
+                for (int i = 0; i < count; i++) {
+                    final MenuItemImpl item = items.get(i);
+                    if (item == expandedItem) {
+                        mExpandedIndex = i;
+                        return;
+                    }
+                }
+            }
+            mExpandedIndex = -1;
+        }
+    }
+
+    private class ExpandedIndexObserver extends DataSetObserver {
+        @Override
+        public void onChanged() {
+            mAdapter.findExpandedIndex();
+        }
+    }
+}