diff options
Diffstat (limited to 'actionbarsherlock/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java')
| -rw-r--r-- | actionbarsherlock/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/actionbarsherlock/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java b/actionbarsherlock/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java new file mode 100644 index 000000000..6f568c698 --- /dev/null +++ b/actionbarsherlock/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java @@ -0,0 +1,721 @@ +/* + * Copyright (C) 2011 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 static com.actionbarsherlock.internal.ResourcesCompat.getResources_getInteger; +import java.util.ArrayList; +import java.util.HashSet; +import java.util.Set; +import android.content.Context; +import android.content.res.Configuration; +import android.content.res.Resources; +import android.content.res.TypedArray; +import android.os.Build; +import android.os.Parcel; +import android.os.Parcelable; +import android.util.SparseBooleanArray; +import android.view.SoundEffectConstants; +import android.view.View; +import android.view.View.MeasureSpec; +import android.view.ViewConfiguration; +import android.view.ViewGroup; +import android.widget.ImageButton; +import com.actionbarsherlock.R; +import com.actionbarsherlock.internal.view.View_HasStateListenerSupport; +import com.actionbarsherlock.internal.view.View_OnAttachStateChangeListener; +import com.actionbarsherlock.internal.view.menu.ActionMenuView.ActionMenuChildView; +import com.actionbarsherlock.view.ActionProvider; +import com.actionbarsherlock.view.MenuItem; + +/** + * MenuPresenter for building action menus as seen in the action bar and action modes. + */ +public class ActionMenuPresenter extends BaseMenuPresenter + implements ActionProvider.SubUiVisibilityListener { + //UNUSED private static final String TAG = "ActionMenuPresenter"; + + private View mOverflowButton; + private boolean mReserveOverflow; + private boolean mReserveOverflowSet; + private int mWidthLimit; + private int mActionItemWidthLimit; + private int mMaxItems; + private boolean mMaxItemsSet; + private boolean mStrictWidthLimit; + private boolean mWidthLimitSet; + private boolean mExpandedActionViewsExclusive; + + private int mMinCellSize; + + // Group IDs that have been added as actions - used temporarily, allocated here for reuse. + private final SparseBooleanArray mActionButtonGroups = new SparseBooleanArray(); + + private View mScrapActionButtonView; + + private OverflowPopup mOverflowPopup; + private ActionButtonSubmenu mActionButtonPopup; + + private OpenOverflowRunnable mPostedOpenRunnable; + + final PopupPresenterCallback mPopupPresenterCallback = new PopupPresenterCallback(); + int mOpenSubMenuId; + + public ActionMenuPresenter(Context context) { + super(context, R.layout.abs__action_menu_layout, + R.layout.abs__action_menu_item_layout); + } + + @Override + public void initForMenu(Context context, MenuBuilder menu) { + super.initForMenu(context, menu); + + final Resources res = context.getResources(); + + if (!mReserveOverflowSet) { + mReserveOverflow = reserveOverflow(mContext); + } + + if (!mWidthLimitSet) { + mWidthLimit = res.getDisplayMetrics().widthPixels / 2; + } + + // Measure for initial configuration + if (!mMaxItemsSet) { + mMaxItems = getResources_getInteger(context, R.integer.abs__max_action_buttons); + } + + int width = mWidthLimit; + if (mReserveOverflow) { + if (mOverflowButton == null) { + mOverflowButton = new OverflowMenuButton(mSystemContext); + final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); + mOverflowButton.measure(spec, spec); + } + width -= mOverflowButton.getMeasuredWidth(); + } else { + mOverflowButton = null; + } + + mActionItemWidthLimit = width; + + mMinCellSize = (int) (ActionMenuView.MIN_CELL_SIZE * res.getDisplayMetrics().density); + + // Drop a scrap view as it may no longer reflect the proper context/config. + mScrapActionButtonView = null; + } + + public static boolean reserveOverflow(Context context) { + //Check for theme-forced overflow action item + TypedArray a = context.getTheme().obtainStyledAttributes(R.styleable.SherlockTheme); + boolean result = a.getBoolean(R.styleable.SherlockTheme_absForceOverflow, false); + a.recycle(); + if (result) { + return true; + } + + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { + return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB); + } else { + return !HasPermanentMenuKey.get(context); + } + } + + private static class HasPermanentMenuKey { + public static boolean get(Context context) { + return ViewConfiguration.get(context).hasPermanentMenuKey(); + } + } + + public void onConfigurationChanged(Configuration newConfig) { + if (!mMaxItemsSet) { + mMaxItems = getResources_getInteger(mContext, + R.integer.abs__max_action_buttons); + if (mMenu != null) { + mMenu.onItemsChanged(true); + } + } + } + + public void setWidthLimit(int width, boolean strict) { + mWidthLimit = width; + mStrictWidthLimit = strict; + mWidthLimitSet = true; + } + + public void setReserveOverflow(boolean reserveOverflow) { + mReserveOverflow = reserveOverflow; + mReserveOverflowSet = true; + } + + public void setItemLimit(int itemCount) { + mMaxItems = itemCount; + mMaxItemsSet = true; + } + + public void setExpandedActionViewsExclusive(boolean isExclusive) { + mExpandedActionViewsExclusive = isExclusive; + } + + @Override + public MenuView getMenuView(ViewGroup root) { + MenuView result = super.getMenuView(root); + ((ActionMenuView) result).setPresenter(this); + return result; + } + + @Override + public View getItemView(MenuItemImpl item, View convertView, ViewGroup parent) { + View actionView = item.getActionView(); + if (actionView == null || item.hasCollapsibleActionView()) { + if (!(convertView instanceof ActionMenuItemView)) { + convertView = null; + } + actionView = super.getItemView(item, convertView, parent); + } + actionView.setVisibility(item.isActionViewExpanded() ? View.GONE : View.VISIBLE); + + final ActionMenuView menuParent = (ActionMenuView) parent; + final ViewGroup.LayoutParams lp = actionView.getLayoutParams(); + if (!menuParent.checkLayoutParams(lp)) { + actionView.setLayoutParams(menuParent.generateLayoutParams(lp)); + } + return actionView; + } + + @Override + public void bindItemView(MenuItemImpl item, MenuView.ItemView itemView) { + itemView.initialize(item, 0); + + final ActionMenuView menuView = (ActionMenuView) mMenuView; + ActionMenuItemView actionItemView = (ActionMenuItemView) itemView; + actionItemView.setItemInvoker(menuView); + } + + @Override + public boolean shouldIncludeItem(int childIndex, MenuItemImpl item) { + return item.isActionButton(); + } + + @Override + public void updateMenuView(boolean cleared) { + super.updateMenuView(cleared); + + if (mMenu != null) { + final ArrayList<MenuItemImpl> actionItems = mMenu.getActionItems(); + final int count = actionItems.size(); + for (int i = 0; i < count; i++) { + final ActionProvider provider = actionItems.get(i).getActionProvider(); + if (provider != null) { + provider.setSubUiVisibilityListener(this); + } + } + } + + final ArrayList<MenuItemImpl> nonActionItems = mMenu != null ? + mMenu.getNonActionItems() : null; + + boolean hasOverflow = false; + if (mReserveOverflow && nonActionItems != null) { + final int count = nonActionItems.size(); + if (count == 1) { + hasOverflow = !nonActionItems.get(0).isActionViewExpanded(); + } else { + hasOverflow = count > 0; + } + } + + if (hasOverflow) { + if (mOverflowButton == null) { + mOverflowButton = new OverflowMenuButton(mSystemContext); + } + ViewGroup parent = (ViewGroup) mOverflowButton.getParent(); + if (parent != mMenuView) { + if (parent != null) { + parent.removeView(mOverflowButton); + } + ActionMenuView menuView = (ActionMenuView) mMenuView; + menuView.addView(mOverflowButton, menuView.generateOverflowButtonLayoutParams()); + } + } else if (mOverflowButton != null && mOverflowButton.getParent() == mMenuView) { + ((ViewGroup) mMenuView).removeView(mOverflowButton); + } + + ((ActionMenuView) mMenuView).setOverflowReserved(mReserveOverflow); + } + + @Override + public boolean filterLeftoverView(ViewGroup parent, int childIndex) { + if (parent.getChildAt(childIndex) == mOverflowButton) return false; + return super.filterLeftoverView(parent, childIndex); + } + + public boolean onSubMenuSelected(SubMenuBuilder subMenu) { + if (!subMenu.hasVisibleItems()) return false; + + SubMenuBuilder topSubMenu = subMenu; + while (topSubMenu.getParentMenu() != mMenu) { + topSubMenu = (SubMenuBuilder) topSubMenu.getParentMenu(); + } + View anchor = findViewForItem(topSubMenu.getItem()); + if (anchor == null) { + if (mOverflowButton == null) return false; + anchor = mOverflowButton; + } + + mOpenSubMenuId = subMenu.getItem().getItemId(); + mActionButtonPopup = new ActionButtonSubmenu(mContext, subMenu); + mActionButtonPopup.setAnchorView(anchor); + mActionButtonPopup.show(); + super.onSubMenuSelected(subMenu); + return true; + } + + private View findViewForItem(MenuItem item) { + final ViewGroup parent = (ViewGroup) mMenuView; + if (parent == null) return null; + + final int count = parent.getChildCount(); + for (int i = 0; i < count; i++) { + final View child = parent.getChildAt(i); + if (child instanceof MenuView.ItemView && + ((MenuView.ItemView) child).getItemData() == item) { + return child; + } + } + return null; + } + + /** + * Display the overflow menu if one is present. + * @return true if the overflow menu was shown, false otherwise. + */ + public boolean showOverflowMenu() { + if (mReserveOverflow && !isOverflowMenuShowing() && mMenu != null && mMenuView != null && + mPostedOpenRunnable == null && !mMenu.getNonActionItems().isEmpty()) { + OverflowPopup popup = new OverflowPopup(mContext, mMenu, mOverflowButton, true); + mPostedOpenRunnable = new OpenOverflowRunnable(popup); + // Post this for later; we might still need a layout for the anchor to be right. + ((View) mMenuView).post(mPostedOpenRunnable); + + // ActionMenuPresenter uses null as a callback argument here + // to indicate overflow is opening. + super.onSubMenuSelected(null); + + return true; + } + return false; + } + + /** + * Hide the overflow menu if it is currently showing. + * + * @return true if the overflow menu was hidden, false otherwise. + */ + public boolean hideOverflowMenu() { + if (mPostedOpenRunnable != null && mMenuView != null) { + ((View) mMenuView).removeCallbacks(mPostedOpenRunnable); + mPostedOpenRunnable = null; + return true; + } + + MenuPopupHelper popup = mOverflowPopup; + if (popup != null) { + popup.dismiss(); + return true; + } + return false; + } + + /** + * Dismiss all popup menus - overflow and submenus. + * @return true if popups were dismissed, false otherwise. (This can be because none were open.) + */ + public boolean dismissPopupMenus() { + boolean result = hideOverflowMenu(); + result |= hideSubMenus(); + return result; + } + + /** + * Dismiss all submenu popups. + * + * @return true if popups were dismissed, false otherwise. (This can be because none were open.) + */ + public boolean hideSubMenus() { + if (mActionButtonPopup != null) { + mActionButtonPopup.dismiss(); + return true; + } + return false; + } + + /** + * @return true if the overflow menu is currently showing + */ + public boolean isOverflowMenuShowing() { + return mOverflowPopup != null && mOverflowPopup.isShowing(); + } + + /** + * @return true if space has been reserved in the action menu for an overflow item. + */ + public boolean isOverflowReserved() { + return mReserveOverflow; + } + + public boolean flagActionItems() { + final ArrayList<MenuItemImpl> visibleItems = mMenu.getVisibleItems(); + final int itemsSize = visibleItems.size(); + int maxActions = mMaxItems; + int widthLimit = mActionItemWidthLimit; + final int querySpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); + final ViewGroup parent = (ViewGroup) mMenuView; + + int requiredItems = 0; + int requestedItems = 0; + int firstActionWidth = 0; + boolean hasOverflow = false; + for (int i = 0; i < itemsSize; i++) { + MenuItemImpl item = visibleItems.get(i); + if (item.requiresActionButton()) { + requiredItems++; + } else if (item.requestsActionButton()) { + requestedItems++; + } else { + hasOverflow = true; + } + if (mExpandedActionViewsExclusive && item.isActionViewExpanded()) { + // Overflow everything if we have an expanded action view and we're + // space constrained. + maxActions = 0; + } + } + + // Reserve a spot for the overflow item if needed. + if (mReserveOverflow && + (hasOverflow || requiredItems + requestedItems > maxActions)) { + maxActions--; + } + maxActions -= requiredItems; + + final SparseBooleanArray seenGroups = mActionButtonGroups; + seenGroups.clear(); + + int cellSize = 0; + int cellsRemaining = 0; + if (mStrictWidthLimit) { + cellsRemaining = widthLimit / mMinCellSize; + final int cellSizeRemaining = widthLimit % mMinCellSize; + cellSize = mMinCellSize + cellSizeRemaining / cellsRemaining; + } + + // Flag as many more requested items as will fit. + for (int i = 0; i < itemsSize; i++) { + MenuItemImpl item = visibleItems.get(i); + + if (item.requiresActionButton()) { + View v = getItemView(item, mScrapActionButtonView, parent); + if (mScrapActionButtonView == null) { + mScrapActionButtonView = v; + } + if (mStrictWidthLimit) { + cellsRemaining -= ActionMenuView.measureChildForCells(v, + cellSize, cellsRemaining, querySpec, 0); + } else { + v.measure(querySpec, querySpec); + } + final int measuredWidth = v.getMeasuredWidth(); + widthLimit -= measuredWidth; + if (firstActionWidth == 0) { + firstActionWidth = measuredWidth; + } + final int groupId = item.getGroupId(); + if (groupId != 0) { + seenGroups.put(groupId, true); + } + item.setIsActionButton(true); + } else if (item.requestsActionButton()) { + // Items in a group with other items that already have an action slot + // can break the max actions rule, but not the width limit. + final int groupId = item.getGroupId(); + final boolean inGroup = seenGroups.get(groupId); + boolean isAction = (maxActions > 0 || inGroup) && widthLimit > 0 && + (!mStrictWidthLimit || cellsRemaining > 0); + + if (isAction) { + View v = getItemView(item, mScrapActionButtonView, parent); + if (mScrapActionButtonView == null) { + mScrapActionButtonView = v; + } + if (mStrictWidthLimit) { + final int cells = ActionMenuView.measureChildForCells(v, + cellSize, cellsRemaining, querySpec, 0); + cellsRemaining -= cells; + if (cells == 0) { + isAction = false; + } + } else { + v.measure(querySpec, querySpec); + } + final int measuredWidth = v.getMeasuredWidth(); + widthLimit -= measuredWidth; + if (firstActionWidth == 0) { + firstActionWidth = measuredWidth; + } + + if (mStrictWidthLimit) { + isAction &= widthLimit >= 0; + } else { + // Did this push the entire first item past the limit? + isAction &= widthLimit + firstActionWidth > 0; + } + } + + if (isAction && groupId != 0) { + seenGroups.put(groupId, true); + } else if (inGroup) { + // We broke the width limit. Demote the whole group, they all overflow now. + seenGroups.put(groupId, false); + for (int j = 0; j < i; j++) { + MenuItemImpl areYouMyGroupie = visibleItems.get(j); + if (areYouMyGroupie.getGroupId() == groupId) { + // Give back the action slot + if (areYouMyGroupie.isActionButton()) maxActions++; + areYouMyGroupie.setIsActionButton(false); + } + } + } + + if (isAction) maxActions--; + + item.setIsActionButton(isAction); + } + } + return true; + } + + @Override + public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { + dismissPopupMenus(); + super.onCloseMenu(menu, allMenusAreClosing); + } + + @Override + public Parcelable onSaveInstanceState() { + SavedState state = new SavedState(); + state.openSubMenuId = mOpenSubMenuId; + return state; + } + + @Override + public void onRestoreInstanceState(Parcelable state) { + SavedState saved = (SavedState) state; + if (saved.openSubMenuId > 0) { + MenuItem item = mMenu.findItem(saved.openSubMenuId); + if (item != null) { + SubMenuBuilder subMenu = (SubMenuBuilder) item.getSubMenu(); + onSubMenuSelected(subMenu); + } + } + } + + @Override + public void onSubUiVisibilityChanged(boolean isVisible) { + if (isVisible) { + // Not a submenu, but treat it like one. + super.onSubMenuSelected(null); + } else { + mMenu.close(false); + } + } + + private static class SavedState implements Parcelable { + public int openSubMenuId; + + SavedState() { + } + + SavedState(Parcel in) { + openSubMenuId = in.readInt(); + } + + @Override + public int describeContents() { + return 0; + } + + @Override + public void writeToParcel(Parcel dest, int flags) { + dest.writeInt(openSubMenuId); + } + + @SuppressWarnings("unused") + public static final Parcelable.Creator<SavedState> CREATOR + = new Parcelable.Creator<SavedState>() { + public SavedState createFromParcel(Parcel in) { + return new SavedState(in); + } + + public SavedState[] newArray(int size) { + return new SavedState[size]; + } + }; + } + + private class OverflowMenuButton extends ImageButton implements ActionMenuChildView, View_HasStateListenerSupport { + private final Set<View_OnAttachStateChangeListener> mListeners = new HashSet<View_OnAttachStateChangeListener>(); + + public OverflowMenuButton(Context context) { + super(context, null, 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; + } + + public boolean needsDividerBefore() { + return false; + } + + public boolean needsDividerAfter() { + return false; + } + + @Override + protected void onAttachedToWindow() { + super.onAttachedToWindow(); + for (View_OnAttachStateChangeListener listener : mListeners) { + listener.onViewAttachedToWindow(this); + } + } + + @Override + protected void onDetachedFromWindow() { + super.onDetachedFromWindow(); + for (View_OnAttachStateChangeListener listener : mListeners) { + listener.onViewDetachedFromWindow(this); + } + } + + @Override + public void addOnAttachStateChangeListener(View_OnAttachStateChangeListener listener) { + mListeners.add(listener); + } + + @Override + public void removeOnAttachStateChangeListener(View_OnAttachStateChangeListener listener) { + mListeners.remove(listener); + } + } + + private class OverflowPopup extends MenuPopupHelper { + public OverflowPopup(Context context, MenuBuilder menu, View anchorView, + boolean overflowOnly) { + super(context, menu, anchorView, overflowOnly); + setCallback(mPopupPresenterCallback); + } + + @Override + public void onDismiss() { + super.onDismiss(); + mMenu.close(); + mOverflowPopup = null; + } + } + + private class ActionButtonSubmenu extends MenuPopupHelper { + //UNUSED private SubMenuBuilder mSubMenu; + + public ActionButtonSubmenu(Context context, SubMenuBuilder subMenu) { + super(context, subMenu); + //UNUSED mSubMenu = subMenu; + + MenuItemImpl item = (MenuItemImpl) subMenu.getItem(); + if (!item.isActionButton()) { + // Give a reasonable anchor to nested submenus. + setAnchorView(mOverflowButton == null ? (View) mMenuView : mOverflowButton); + } + + setCallback(mPopupPresenterCallback); + + 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; + } + } + setForceShowIcon(preserveIconSpacing); + } + + @Override + public void onDismiss() { + super.onDismiss(); + mActionButtonPopup = null; + mOpenSubMenuId = 0; + } + } + + private class PopupPresenterCallback implements MenuPresenter.Callback { + + @Override + public boolean onOpenSubMenu(MenuBuilder subMenu) { + if (subMenu == null) return false; + + mOpenSubMenuId = ((SubMenuBuilder) subMenu).getItem().getItemId(); + return false; + } + + @Override + public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { + if (menu instanceof SubMenuBuilder) { + ((SubMenuBuilder) menu).getRootMenu().close(false); + } + } + } + + private class OpenOverflowRunnable implements Runnable { + private OverflowPopup mPopup; + + public OpenOverflowRunnable(OverflowPopup popup) { + mPopup = popup; + } + + public void run() { + mMenu.changeMenuMode(); + final View menuView = (View) mMenuView; + if (menuView != null && menuView.getWindowToken() != null && mPopup.tryShow()) { + mOverflowPopup = mPopup; + } + mPostedOpenRunnable = null; + } + } +} |