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com.actionbarsherlock.internal.view.menu.ActionMenuPresenter Maven / Gradle / Ivy
/*
* 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.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) {
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 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 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 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 CREATOR
= new Parcelable.Creator() {
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 mListeners = new HashSet();
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);
}
if (mOverflowPopup != null) mOverflowPopup.dismiss();
}
@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;
}
}
}
