Custom popup menu classes copied to the project

The original classes can be found in Appcompat library
This commit is contained in:
serso 2016-04-01 20:52:54 +02:00
parent 127905c53a
commit f29cfbc563
2 changed files with 680 additions and 0 deletions

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package org.solovyev.android.widget.menu;
/*
* Copyright (C) 2014 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.
*/
import android.content.Context;
import android.support.annotation.MenuRes;
import android.support.v7.appcompat.R;
import android.support.v7.view.SupportMenuInflater;
import android.support.v7.view.menu.MenuBuilder;
import android.support.v7.view.menu.MenuPopupHelper;
import android.support.v7.view.menu.MenuPresenter;
import android.support.v7.view.menu.SubMenuBuilder;
import android.support.v7.widget.ListPopupWindow;
import android.view.*;
/**
* Static library support version of the framework's {@link android.widget.PopupMenu}.
* Used to write apps that run on platforms prior to Android 3.0. When running
* on Android 3.0 or above, this implementation is still used; it does not try
* to switch to the framework's implementation. See the framework SDK
* documentation for a class overview.
*/
public class CustomPopupMenu implements MenuBuilder.Callback, MenuPresenter.Callback {
private Context mContext;
private MenuBuilder mMenu;
private View mAnchor;
private CustomPopupMenuHelper mPopup;
private OnMenuItemClickListener mMenuItemClickListener;
private OnDismissListener mDismissListener;
private View.OnTouchListener mDragListener;
/**
* Construct a new PopupMenu.
*
* @param context Context for the PopupMenu.
* @param anchor Anchor view for this popup. The popup will appear below the anchor if there
* is room, or above it if there is not.
*/
public CustomPopupMenu(Context context, View anchor) {
this(context, anchor, Gravity.NO_GRAVITY);
}
/**
* Constructor to create a new popup menu with an anchor view and alignment
* gravity.
*
* @param context Context the popup menu is running in, through which it
* can access the current theme, resources, etc.
* @param anchor Anchor view for this popup. The popup will appear below
* the anchor if there is room, or above it if there is not.
* @param gravity The {@link Gravity} value for aligning the popup with its
* anchor.
*/
public CustomPopupMenu(Context context, View anchor, int gravity) {
this(context, anchor, gravity, R.attr.popupMenuStyle, 0);
}
/**
* Constructor a create a new popup menu with a specific style.
*
* @param context Context the popup menu is running in, through which it
* can access the current theme, resources, etc.
* @param anchor Anchor view for this popup. The popup will appear below
* the anchor if there is room, or above it if there is not.
* @param gravity The {@link Gravity} value for aligning the popup with its
* anchor.
* @param popupStyleAttr An attribute in the current theme that contains a
* reference to a style resource that supplies default values for
* the popup window. Can be 0 to not look for defaults.
* @param popupStyleRes A resource identifier of a style resource that
* supplies default values for the popup window, used only if
* popupStyleAttr is 0 or can not be found in the theme. Can be 0
* to not look for defaults.
*/
public CustomPopupMenu(Context context, View anchor, int gravity, int popupStyleAttr,
int popupStyleRes) {
mContext = context;
mMenu = new MenuBuilder(context);
mMenu.setCallback(this);
mAnchor = anchor;
mPopup = new CustomPopupMenuHelper(context, mMenu, anchor, false, popupStyleAttr, popupStyleRes);
mPopup.setGravity(gravity);
mPopup.setCallback(this);
}
/**
* @return the gravity used to align the popup window to its anchor view
* @see #setGravity(int)
*/
public int getGravity() {
return mPopup.getGravity();
}
/**
* Sets the gravity used to align the popup window to its anchor view.
* <p/>
* If the popup is showing, calling this method will take effect only
* the next time the popup is shown.
*
* @param gravity the gravity used to align the popup window
* @see #getGravity()
*/
public void setGravity(int gravity) {
mPopup.setGravity(gravity);
}
/**
* Returns an {@link android.view.View.OnTouchListener} that can be added to the anchor view
* to implement drag-to-open behavior.
* <p/>
* When the listener is set on a view, touching that view and dragging
* outside of its bounds will open the popup window. Lifting will select the
* currently touched list item.
* <p/>
* Example usage:
* <pre>
* PopupMenu myPopup = new PopupMenu(context, myAnchor);
* myAnchor.setOnTouchListener(myPopup.getDragToOpenListener());
* </pre>
*
* @return a touch listener that controls drag-to-open behavior
*/
public View.OnTouchListener getDragToOpenListener() {
if (mDragListener == null) {
mDragListener = new ListPopupWindow.ForwardingListener(mAnchor) {
@Override
protected boolean onForwardingStarted() {
show();
return true;
}
@Override
protected boolean onForwardingStopped() {
dismiss();
return true;
}
@Override
public ListPopupWindow getPopup() {
// This will be null until show() is called.
return mPopup.getPopup();
}
};
}
return mDragListener;
}
/**
* @return the {@link Menu} associated with this popup. Populate the returned Menu with
* items before calling {@link #show()}.
* @see #show()
* @see #getMenuInflater()
*/
public Menu getMenu() {
return mMenu;
}
/**
* @return a {@link MenuInflater} that can be used to inflate menu items from XML into the
* menu returned by {@link #getMenu()}.
* @see #getMenu()
*/
public MenuInflater getMenuInflater() {
return new SupportMenuInflater(mContext);
}
/**
* Inflate a menu resource into this PopupMenu. This is equivalent to calling
* popupMenu.getMenuInflater().inflate(menuRes, popupMenu.getMenu()).
*
* @param menuRes Menu resource to inflate
*/
public void inflate(@MenuRes int menuRes) {
getMenuInflater().inflate(menuRes, mMenu);
}
/**
* Show the menu popup anchored to the view specified during construction.
*
* @see #dismiss()
*/
public void show() {
mPopup.show();
}
/**
* Dismiss the menu popup.
*
* @see #show()
*/
public void dismiss() {
mPopup.dismiss();
}
/**
* Set a listener that will be notified when the user selects an item from the menu.
*
* @param listener Listener to notify
*/
public void setOnMenuItemClickListener(OnMenuItemClickListener listener) {
mMenuItemClickListener = listener;
}
/**
* Set a listener that will be notified when this menu is dismissed.
*
* @param listener Listener to notify
*/
public void setOnDismissListener(OnDismissListener listener) {
mDismissListener = listener;
}
public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) {
if (mMenuItemClickListener != null) {
return mMenuItemClickListener.onMenuItemClick(item);
}
return false;
}
public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
if (mDismissListener != null) {
mDismissListener.onDismiss(this);
}
}
public boolean onOpenSubMenu(MenuBuilder subMenu) {
if (subMenu == null) return false;
if (!subMenu.hasVisibleItems()) {
return true;
}
// Current menu will be dismissed by the normal helper, submenu will be shown in its place.
new MenuPopupHelper(mContext, subMenu, mAnchor).show();
return true;
}
public void onCloseSubMenu(SubMenuBuilder menu) {
}
public void onMenuModeChange(MenuBuilder menu) {
}
/**
* Callback interface used to notify the application that the menu has closed.
*/
public interface OnDismissListener {
/**
* Called when the associated menu has been dismissed.
*
* @param menu The PopupMenu that was dismissed.
*/
public void onDismiss(CustomPopupMenu menu);
}
/**
* Interface responsible for receiving menu item click events if the items themselves
* do not have individual item click listeners.
*/
public interface OnMenuItemClickListener {
/**
* This method will be invoked when a menu item is clicked if the item itself did
* not already handle the event.
*
* @param item {@link MenuItem} that was clicked
* @return <code>true</code> if the event was handled, <code>false</code> otherwise.
*/
public boolean onMenuItemClick(MenuItem item);
}
}

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/*
* 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 org.solovyev.android.widget.menu;
import android.content.Context;
import android.content.res.Resources;
import android.os.Parcelable;
import android.support.v7.appcompat.R;
import android.support.v7.view.menu.*;
import android.support.v7.widget.ListPopupWindow;
import android.view.*;
import android.view.View.MeasureSpec;
import android.widget.*;
import java.util.ArrayList;
/**
* Presents a menu as a small, simple popup anchored to another view.
*/
public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, View.OnKeyListener,
ViewTreeObserver.OnGlobalLayoutListener, PopupWindow.OnDismissListener,
MenuPresenter {
static final int ITEM_LAYOUT = R.layout.abc_popup_menu_item_layout;
private final Context mContext;
private final LayoutInflater mInflater;
private final MenuBuilder mMenu;
private final MenuAdapter mAdapter;
private final boolean mOverflowOnly;
private final int mPopupMaxWidth;
private final int mPopupStyleAttr;
private final int mPopupStyleRes;
private View mAnchorView;
private ListPopupWindow mPopup;
private ViewTreeObserver mTreeObserver;
private Callback mPresenterCallback;
boolean mForceShowIcon;
private ViewGroup mMeasureParent;
/** Whether the cached content width value is valid. */
private boolean mHasContentWidth;
/** Cached content width from {@link #measureContentWidth}. */
private int mContentWidth;
private int mDropDownGravity = Gravity.NO_GRAVITY;
public CustomPopupMenuHelper(Context context, MenuBuilder menu) {
this(context, menu, null, false, R.attr.popupMenuStyle);
}
public CustomPopupMenuHelper(Context context, MenuBuilder menu, View anchorView) {
this(context, menu, anchorView, false, R.attr.popupMenuStyle);
}
public CustomPopupMenuHelper(Context context, MenuBuilder menu, View anchorView,
boolean overflowOnly, int popupStyleAttr) {
this(context, menu, anchorView, overflowOnly, popupStyleAttr, 0);
}
public CustomPopupMenuHelper(Context context, MenuBuilder menu, View anchorView,
boolean overflowOnly, int popupStyleAttr, int popupStyleRes) {
mContext = context;
mInflater = LayoutInflater.from(context);
mMenu = menu;
mAdapter = new MenuAdapter(mMenu);
mOverflowOnly = overflowOnly;
mPopupStyleAttr = popupStyleAttr;
mPopupStyleRes = popupStyleRes;
final Resources res = context.getResources();
mPopupMaxWidth = Math.max(res.getDisplayMetrics().widthPixels / 2,
res.getDimensionPixelSize(R.dimen.abc_config_prefDialogWidth));
mAnchorView = anchorView;
// Present the menu using our context, not the menu builder's context.
menu.addMenuPresenter(this, context);
}
public void setAnchorView(View anchor) {
mAnchorView = anchor;
}
public void setForceShowIcon(boolean forceShow) {
mForceShowIcon = forceShow;
}
public void setGravity(int gravity) {
mDropDownGravity = gravity;
}
public int getGravity() {
return mDropDownGravity;
}
public void show() {
if (!tryShow()) {
throw new IllegalStateException("MenuPopupHelper cannot be used without an anchor");
}
}
public ListPopupWindow getPopup() {
return mPopup;
}
public boolean tryShow() {
mPopup = new ListPopupWindow(mContext, null, mPopupStyleAttr, mPopupStyleRes);
mPopup.setOnDismissListener(this);
mPopup.setOnItemClickListener(this);
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);
mPopup.setAnchorView(anchor);
mPopup.setDropDownGravity(mDropDownGravity);
} else {
return false;
}
if (!mHasContentWidth) {
mContentWidth = measureContentWidth();
mHasContentWidth = true;
}
mPopup.setContentWidth(mContentWidth);
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;
}
}
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() {
// Menus don't tend to be long, so this is more sane than it looks.
int maxWidth = 0;
View itemView = null;
int itemType = 0;
final ListAdapter adapter = mAdapter;
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);
final int itemWidth = itemView.getMeasuredWidth();
if (itemWidth >= mPopupMaxWidth) {
return mPopupMaxWidth;
} else if (itemWidth > maxWidth) {
maxWidth = itemWidth;
}
}
return maxWidth;
}
@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 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) {
mHasContentWidth = false;
if (mAdapter != null) {
mAdapter.notifyDataSetChanged();
}
}
@Override
public void setCallback(Callback cb) {
mPresenterCallback = cb;
}
@Override
public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
if (subMenu.hasVisibleItems()) {
CustomPopupMenuHelper subPopup = new CustomPopupMenuHelper(mContext, subMenu, mAnchorView);
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;
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;
}
@Override
public void notifyDataSetChanged() {
findExpandedIndex();
super.notifyDataSetChanged();
}
}
}