/*
* 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.momock.holo.widget;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.database.DataSetObserver;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.AbsListView.LayoutParams;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import com.momock.ext.holo.R;
/**
* A ListPopupWindow anchors itself to a host view and displays a list of
* choices.
*
* <p>
* ListPopupWindow contains a number of tricky behaviors surrounding
* positioning, scrolling parents to fit the dropdown, interacting sanely with
* the IME if present, and others.
*
* @see android.widget.AutoCompleteTextView
* @see android.widget.Spinner
*/
public class ListPopupWindowCompat implements ListPopupWindow {
private static final String TAG = "ListPopupWindow";
private static final boolean DEBUG = false;
/**
* This value controls the length of time that the user must leave a pointer
* down without scrolling to expand the autocomplete dropdown list to cover
* the IME.
*/
private static final int EXPAND_LIST_TIMEOUT = 250;
private final Context mContext;
private final PopupWindow mPopup;
private ListAdapter mAdapter;
private DropDownListView mDropDownList;
private int mDropDownHeight = ViewGroup.LayoutParams.WRAP_CONTENT;
private int mDropDownWidth = ViewGroup.LayoutParams.WRAP_CONTENT;
private int mDropDownHorizontalOffset;
private int mDropDownVerticalOffset;
private boolean mDropDownVerticalOffsetSet;
private boolean mDropDownAlwaysVisible = false;
private boolean mForceIgnoreOutsideTouch = false;
int mListItemExpandMaximum = Integer.MAX_VALUE;
private View mPromptView;
private int mPromptPosition = POSITION_PROMPT_ABOVE;
private DataSetObserver mObserver;
private View mDropDownAnchorView;
private Drawable mDropDownListHighlight;
private AdapterView.OnItemClickListener mItemClickListener;
private AdapterView.OnItemSelectedListener mItemSelectedListener;
private final ResizePopupRunnable mResizePopupRunnable = new ResizePopupRunnable();
private final PopupTouchInterceptor mTouchInterceptor = new PopupTouchInterceptor();
// private final PopupScrollListener mScrollListener = new
// PopupScrollListener();
private final ListSelectorHider mHideSelector = new ListSelectorHider();
private Runnable mShowDropDownRunnable;
private final Handler mHandler = new Handler();
private final Rect mTempRect = new Rect();
private boolean mModal;
// from ICS ListView
static final int NO_POSITION = -1;
/**
* Create a new, empty popup window capable of displaying items from a
* ListAdapter. Backgrounds should be set using
* {@link #setBackgroundDrawable(Drawable)}.
*
* @param context Context used for contained views.
*/
public ListPopupWindowCompat(final Context context) {
this(context, null, 0, 0);
}
/**
* Create a new, empty popup window capable of displaying items from a
* ListAdapter. Backgrounds should be set using
* {@link #setBackgroundDrawable(Drawable)}.
*
* @param context Context used for contained views.
* @param attrs Attributes from inflating parent views used to style the
* popup.
*/
public ListPopupWindowCompat(final Context context, final AttributeSet attrs) {
this(context, attrs, 0, 0);
}
/**
* Create a new, empty popup window capable of displaying items from a
* ListAdapter. Backgrounds should be set using
* {@link #setBackgroundDrawable(Drawable)}.
*
* @param context Context used for contained views.
* @param attrs Attributes from inflating parent views used to style the
* popup.
* @param defStyleAttr Default style attribute to use for popup content.
*/
public ListPopupWindowCompat(final Context context, final AttributeSet attrs, final int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
/**
* Create a new, empty popup window capable of displaying items from a
* ListAdapter. Backgrounds should be set using
* {@link #setBackgroundDrawable(Drawable)}.
*
* @param context Context used for contained views.
* @param attrs Attributes from inflating parent views used to style the
* popup.
* @param defStyleAttr Style attribute to read for default styling of popup
* content.
* @param defStyleRes Style resource ID to use for default styling of popup
* content.
*/
public ListPopupWindowCompat(final Context context, final AttributeSet attrs, final int defStyleAttr,
final int defStyleRes) {
mContext = context;
mPopup = new PopupWindow(context, attrs);
mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
final Theme theme = context.getTheme();
final TypedArray array = theme.obtainStyledAttributes(new int[] { R.attr.popupBackground,
android.R.attr.listSelector });
mPopup.setBackgroundDrawable(array.getDrawable(0));
mDropDownListHighlight = array.getDrawable(1);
array.recycle();
}
/**
* Clear any current list selection. Only valid when {@link #isShowing()} ==
* {@code true}.
*/
@Override
public void clearListSelection() {
final DropDownListView list = mDropDownList;
if (list != null) {
// WARNING: Please read the comment where mListSelectionHidden is
// declared
list.mListSelectionHidden = true;
// list.hideSelector();
list.requestLayout();
}
}
/**
* Dismiss the popup window.
*/
@Override
public void dismiss() {
mPopup.dismiss();
removePromptView();
mPopup.setContentView(null);
mDropDownList = null;
mHandler.removeCallbacks(mResizePopupRunnable);
}
/**
* Returns the view that will be used to anchor this popup.
*
* @return The popup's anchor view
*/
@Override
public View getAnchorView() {
return mDropDownAnchorView;
}
/**
* Returns the animation style that will be used when the popup window is
* shown or dismissed.
*
* @return Animation style that will be used.
*/
@Override
public int getAnimationStyle() {
return mPopup.getAnimationStyle();
}
/**
* @return The background drawable for the popup window.
*/
@Override
public Drawable getBackground() {
return mPopup.getBackground();
}
/**
* @return The height of the popup window in pixels.
*/
@Override
public int getHeight() {
return mDropDownHeight;
}
/**
* @return The horizontal offset of the popup from its anchor in pixels.
*/
@Override
public int getHorizontalOffset() {
return mDropDownHorizontalOffset;
}
/**
* Return the current value in {@link #setInputMethodMode(int)}.
*
* @see #setInputMethodMode(int)
*/
@Override
public int getInputMethodMode() {
return mPopup.getInputMethodMode();
}
/**
* @return The {@link ListView} displayed within the popup window. Only
* valid when {@link #isShowing()} == {@code true}.
*/
@Override
public ListView getListView() {
return mDropDownList;
}
/**
* @return Where the optional prompt view should appear.
*
* @see #POSITION_PROMPT_ABOVE
* @see #POSITION_PROMPT_BELOW
*/
@Override
public int getPromptPosition() {
return mPromptPosition;
}
/**
* @return The currently selected item or null if the popup is not showing.
*/
@Override
public Object getSelectedItem() {
if (!isShowing()) return null;
return mDropDownList.getSelectedItem();
}
/**
* @return The ID of the currently selected item or
* {@link ListView#INVALID_ROW_ID} if {@link #isShowing()} ==
* {@code false}.
*
* @see ListView#getSelectedItemId()
*/
@Override
public long getSelectedItemId() {
if (!isShowing()) return ListView.INVALID_ROW_ID;
return mDropDownList.getSelectedItemId();
}
/**
* @return The position of the currently selected item or
* {@link ListView#INVALID_POSITION} if {@link #isShowing()} ==
* {@code false}.
*
* @see ListView#getSelectedItemPosition()
*/
@Override
public int getSelectedItemPosition() {
if (!isShowing()) return ListView.INVALID_POSITION;
return mDropDownList.getSelectedItemPosition();
}
/**
* @return The View for the currently selected item or null if
* {@link #isShowing()} == {@code false}.
*
* @see ListView#getSelectedView()
*/
@Override
public View getSelectedView() {
if (!isShowing()) return null;
return mDropDownList.getSelectedView();
}
/**
* Returns the current value in {@link #setSoftInputMode(int)}.
*
* @see #setSoftInputMode(int)
* @see android.view.WindowManager.LayoutParams#softInputMode
*/
@Override
public int getSoftInputMode() {
return mPopup.getSoftInputMode();
}
/**
* @return The vertical offset of the popup from its anchor in pixels.
*/
@Override
public int getVerticalOffset() {
if (!mDropDownVerticalOffsetSet) return 0;
return mDropDownVerticalOffset;
}
/**
* @return The width of the popup window in pixels.
*/
@Override
public int getWidth() {
return mDropDownWidth;
}
/**
* @return Whether the drop-down is visible under special conditions.
*
* @hide Only used by AutoCompleteTextView under special conditions.
*/
public boolean isDropDownAlwaysVisible() {
return mDropDownAlwaysVisible;
}
/**
* @return {@code true} if this popup is configured to assume the user does
* not need to interact with the IME while it is showing,
* {@code false} otherwise.
*/
@Override
public boolean isInputMethodNotNeeded() {
return mPopup.getInputMethodMode() == INPUT_METHOD_NOT_NEEDED;
}
/**
* Returns whether the popup window will be modal when shown.
*
* @return {@code true} if the popup window will be modal, {@code false}
* otherwise.
*/
@Override
public boolean isModal() {
return mModal;
}
/**
* @return {@code true} if the popup is currently showing, {@code false}
* otherwise.
*/
@Override
public boolean isShowing() {
return mPopup.isShowing();
}
/**
* Filter key down events. By forwarding key down events to this function,
* views using non-modal ListPopupWindow can have it handle key selection of
* items.
*
* @param keyCode keyCode param passed to the host view's onKeyDown
* @param event event param passed to the host view's onKeyDown
* @return true if the event was handled, false if it was ignored.
*
* @see #setModal(boolean)
*/
public boolean onKeyDown(final int keyCode, final KeyEvent event) {
// when the drop down is shown, we drive it directly
if (isShowing()) {
// the key events are forwarded to the list in the drop down view
// note that ListView handles space but we don't want that to happen
// also if selection is not currently in the drop down, then don't
// let center or enter presses go there since that would cause it
// to select one of its items
if (keyCode != KeyEvent.KEYCODE_SPACE
&& (mDropDownList.getSelectedItemPosition() >= 0 || keyCode != KeyEvent.KEYCODE_ENTER
&& keyCode != KeyEvent.KEYCODE_DPAD_CENTER)) {
final int curIndex = mDropDownList.getSelectedItemPosition();
boolean consumed;
final boolean below = !mPopup.isAboveAnchor();
final ListAdapter adapter = mAdapter;
int firstItem = Integer.MAX_VALUE;
int lastItem = Integer.MIN_VALUE;
if (adapter != null) {
firstItem = 0;
lastItem = adapter.getCount() - 1;
// firstItem = allEnabled ? 0 :
// mDropDownList.lookForSelectablePosition(0, true);
// lastItem = allEnabled ? adapter.getCount() - 1 :
// mDropDownList.lookForSelectablePosition(adapter.getCount()
// - 1, false);
}
if (below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex <= firstItem || !below
&& keyCode == KeyEvent.KEYCODE_DPAD_DOWN && curIndex >= lastItem) {
// When the selection is at the top, we block the key
// event to prevent focus from moving.
clearListSelection();
mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
show();
return true;
} else {
// WARNING: Please read the comment where
// mListSelectionHidden
// is declared
mDropDownList.mListSelectionHidden = false;
}
consumed = mDropDownList.onKeyDown(keyCode, event);
if (DEBUG) {
Log.v(TAG, "Key down: code=" + keyCode + " list consumed=" + consumed);
}
if (consumed) {
// If it handled the key event, then the user is
// navigating in the list, so we should put it in front.
mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
// Here's a little trick we need to do to make sure that
// the list view is actually showing its focus indicator,
// by ensuring it has focus and getting its window out
// of touch mode.
mDropDownList.requestFocusFromTouch();
show();
switch (keyCode) {
// avoid passing the focus from the text view to the
// next component
case KeyEvent.KEYCODE_ENTER:
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_DPAD_DOWN:
case KeyEvent.KEYCODE_DPAD_UP:
return true;
}
} else {
if (below && keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
// when the selection is at the bottom, we block the
// event to avoid going to the next focusable widget
if (curIndex == lastItem) return true;
} else if (!below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex == firstItem) return true;
}
}
}
return false;
}
/**
* Filter pre-IME key events. By forwarding
* {@link View#onKeyPreIme(int, KeyEvent)} events to this function, views
* using ListPopupWindow can have it dismiss the popup when the back key is
* pressed.
*
* @param keyCode keyCode param passed to the host view's onKeyPreIme
* @param event event param passed to the host view's onKeyPreIme
* @return true if the event was handled, false if it was ignored.
*
* @see #setModal(boolean)
*/
public boolean onKeyPreIme(final int keyCode, final KeyEvent event) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR)
return OnKeyPreImeAccessor.onKeyPreIme(this, keyCode, event);
return false;
}
/**
* Filter key down events. By forwarding key up events to this function,
* views using non-modal ListPopupWindow can have it handle key selection of
* items.
*
* @param keyCode keyCode param passed to the host view's onKeyUp
* @param event event param passed to the host view's onKeyUp
* @return true if the event was handled, false if it was ignored.
*
* @see #setModal(boolean)
*/
public boolean onKeyUp(final int keyCode, final KeyEvent event) {
if (isShowing() && mDropDownList.getSelectedItemPosition() >= 0) {
final boolean consumed = mDropDownList.onKeyUp(keyCode, event);
if (consumed) {
switch (keyCode) {
// if the list accepts the key events and the key event
// was a click, the text view gets the selected item
// from the drop down as its content
case KeyEvent.KEYCODE_ENTER:
case KeyEvent.KEYCODE_DPAD_CENTER:
dismiss();
break;
}
}
return consumed;
}
return false;
}
/**
* Perform an item click operation on the specified list adapter position.
*
* @param position Adapter position for performing the click
* @return true if the click action could be performed, false if not. (e.g.
* if the popup was not showing, this method would return false.)
*/
@Override
public boolean performItemClick(final int position) {
if (isShowing()) {
if (mItemClickListener != null) {
final DropDownListView list = mDropDownList;
final View child = list.getChildAt(position - list.getFirstVisiblePosition());
final ListAdapter adapter = list.getAdapter();
mItemClickListener.onItemClick(list, child, position, adapter.getItemId(position));
}
return true;
}
return false;
}
/**
* Post a {@link #show()} call to the UI thread.
*/
@Override
public void postShow() {
mHandler.post(mShowDropDownRunnable);
}
/**
* Sets the adapter that provides the data and the views to represent the
* data in this popup window.
*
* @param adapter The adapter to use to create this window's content.
*/
@Override
public void setAdapter(final ListAdapter adapter) {
if (mObserver == null) {
mObserver = new PopupDataSetObserver();
} else if (mAdapter != null) {
mAdapter.unregisterDataSetObserver(mObserver);
}
mAdapter = adapter;
if (mAdapter != null) {
adapter.registerDataSetObserver(mObserver);
}
if (mDropDownList != null) {
mDropDownList.setAdapter(mAdapter);
}
}
/**
* Sets the popup's anchor view. This popup will always be positioned
* relative to the anchor view when shown.
*
* @param anchor The view to use as an anchor.
*/
@Override
public void setAnchorView(final View anchor) {
mDropDownAnchorView = anchor;
}
/**
* Set an animation style to use when the popup window is shown or
* dismissed.
*
* @param animationStyle Animation style to use.
*/
@Override
public void setAnimationStyle(final int animationStyle) {
mPopup.setAnimationStyle(animationStyle);
}
/**
* Sets a drawable to be the background for the popup window.
*
* @param d A drawable to set as the background.
*/
@Override
public void setBackgroundDrawable(final Drawable d) {
mPopup.setBackgroundDrawable(d);
}
/**
* Sets the width of the popup window by the size of its content. The final
* width may be larger to accommodate styled window dressing.
*
* @param width Desired width of content in pixels.
*/
@Override
public void setContentWidth(final int width) {
final Drawable popupBackground = mPopup.getBackground();
if (popupBackground != null) {
popupBackground.getPadding(mTempRect);
mDropDownWidth = mTempRect.left + mTempRect.right + width;
} else {
setWidth(width);
}
}
/**
* Sets whether the drop-down should remain visible under certain
* conditions.
*
* The drop-down will occupy the entire screen below {@link #getAnchorView}
* regardless of the size or content of the list. {@link #getBackground()}
* will fill any space that is not used by the list.
*
* @param dropDownAlwaysVisible Whether to keep the drop-down visible.
*
* @hide Only used by AutoCompleteTextView under special conditions.
*/
public void setDropDownAlwaysVisible(final boolean dropDownAlwaysVisible) {
mDropDownAlwaysVisible = dropDownAlwaysVisible;
}
/**
* Forces outside touches to be ignored. Normally if
* {@link #isDropDownAlwaysVisible()} is false, we allow outside touch to
* dismiss the dropdown. If this is set to true, then we ignore outside
* touch even when the drop down is not set to always visible.
*
* @hide Used only by AutoCompleteTextView to handle some internal special
* cases.
*/
public void setForceIgnoreOutsideTouch(final boolean forceIgnoreOutsideTouch) {
mForceIgnoreOutsideTouch = forceIgnoreOutsideTouch;
}
/**
* Sets the height of the popup window in pixels. Can also be
* {@link #MATCH_PARENT}.
*
* @param height Height of the popup window.
*/
@Override
public void setHeight(final int height) {
mDropDownHeight = height;
}
/**
* Set the horizontal offset of this popup from its anchor view in pixels.
*
* @param offset The horizontal offset of the popup from its anchor.
*/
@Override
public void setHorizontalOffset(final int offset) {
mDropDownHorizontalOffset = offset;
}
/**
* Control how the popup operates with an input method: one of
* {@link #INPUT_METHOD_FROM_FOCUSABLE}, {@link #INPUT_METHOD_NEEDED}, or
* {@link #INPUT_METHOD_NOT_NEEDED}.
*
* <p>
* If the popup is showing, calling this method will take effect only the
* next time the popup is shown or through a manual call to the
* {@link #show()} method.
* </p>
*
* @see #getInputMethodMode()
* @see #show()
*/
@Override
public void setInputMethodMode(final int mode) {
mPopup.setInputMethodMode(mode);
}
/**
* Sets a drawable to use as the list item selector.
*
* @param selector List selector drawable to use in the popup.
*/
@Override
public void setListSelector(final Drawable selector) {
mDropDownListHighlight = selector;
}
/**
* Set whether this window should be modal when shown.
*
* <p>
* If a popup window is modal, it will receive all touch and key input. If
* the user touches outside the popup window's content area the popup window
* will be dismissed.
*
* @param modal {@code true} if the popup window should be modal,
* {@code false} otherwise.
*/
@Override
public void setModal(final boolean modal) {
mModal = true;
mPopup.setFocusable(modal);
}
/**
* Set a listener to receive a callback when the popup is dismissed.
*
* @param listener Listener that will be notified when the popup is
* dismissed.
*/
@Override
public void setOnDismissListener(final PopupWindow.OnDismissListener listener) {
mPopup.setOnDismissListener(listener);
}
/**
* Sets a listener to receive events when a list item is clicked.
*
* @param clickListener Listener to register
*
* @see ListView#setOnItemClickListener(android.widget.AdapterView.OnItemClickListener)
*/
@Override
public void setOnItemClickListener(final AdapterView.OnItemClickListener clickListener) {
mItemClickListener = clickListener;
}
/**
* Sets a listener to receive events when a list item is selected.
*
* @param selectedListener Listener to register.
*
* @see ListView#setOnItemSelectedListener(android.widget.AdapterView.OnItemSelectedListener)
*/
@Override
public void setOnItemSelectedListener(final AdapterView.OnItemSelectedListener selectedListener) {
mItemSelectedListener = selectedListener;
}
/**
* Set where the optional prompt view should appear. The default is
* {@link #POSITION_PROMPT_ABOVE}.
*
* @param position A position constant declaring where the prompt should be
* displayed.
*
* @see #POSITION_PROMPT_ABOVE
* @see #POSITION_PROMPT_BELOW
*/
@Override
public void setPromptPosition(final int position) {
mPromptPosition = position;
}
/**
* Set a view to act as a user prompt for this popup window. Where the
* prompt view will appear is controlled by {@link #setPromptPosition(int)}.
*
* @param prompt View to use as an informational prompt.
*/
@Override
public void setPromptView(final View prompt) {
final boolean showing = isShowing();
if (showing) {
removePromptView();
}
mPromptView = prompt;
if (showing) {
show();
}
}
/**
* Set the selected position of the list. Only valid when
* {@link #isShowing()} == {@code true}.
*
* @param position List position to set as selected.
*/
@Override
public void setSelection(final int position) {
final DropDownListView list = mDropDownList;
if (isShowing() && list != null) {
list.mListSelectionHidden = false;
list.setSelection(position);
if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) {
list.setItemChecked(position, true);
}
}
}
/**
* Sets the operating mode for the soft input area.
*
* @param mode The desired mode, see
* {@link android.view.WindowManager.LayoutParams#softInputMode}
* for the full list
*
* @see android.view.WindowManager.LayoutParams#softInputMode
* @see #getSoftInputMode()
*/
@Override
public void setSoftInputMode(final int mode) {
mPopup.setSoftInputMode(mode);
}
/**
* Set the vertical offset of this popup from its anchor view in pixels.
*
* @param offset The vertical offset of the popup from its anchor.
*/
@Override
public void setVerticalOffset(final int offset) {
mDropDownVerticalOffset = offset;
mDropDownVerticalOffsetSet = true;
}
/**
* Sets the width of the popup window in pixels. Can also be
* {@link #MATCH_PARENT} or {@link #WRAP_CONTENT}.
*
* @param width Width of the popup window.
*/
@Override
public void setWidth(final int width) {
mDropDownWidth = width;
}
/**
* Show the popup list. If the list is already showing, this method will
* recalculate the popup's size and position.
*/
@Override
public void show() {
final int height = buildDropDown();
int widthSpec = 0;
int heightSpec = 0;
final boolean noInputMethod = isInputMethodNotNeeded();
// mPopup.setAllowScrollingAnchorParent(!noInputMethod);
if (mPopup.isShowing()) {
if (mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT) {
// The call to PopupWindow's update method below can accept -1
// for any
// value you do not want to update.
widthSpec = -1;
} else if (mDropDownWidth == ViewGroup.LayoutParams.WRAP_CONTENT) {
widthSpec = getAnchorView().getWidth();
} else {
widthSpec = mDropDownWidth;
}
if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) {
// The call to PopupWindow's update method below can accept -1
// for any
// value you do not want to update.
heightSpec = noInputMethod ? height : ViewGroup.LayoutParams.MATCH_PARENT;
if (noInputMethod) {
mPopup.setWindowLayoutMode(
mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? ViewGroup.LayoutParams.MATCH_PARENT
: 0, 0);
} else {
mPopup.setWindowLayoutMode(
mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? ViewGroup.LayoutParams.MATCH_PARENT
: 0, ViewGroup.LayoutParams.MATCH_PARENT);
}
} else if (mDropDownHeight == ViewGroup.LayoutParams.WRAP_CONTENT) {
heightSpec = height;
} else {
heightSpec = mDropDownHeight;
}
mPopup.setOutsideTouchable(!mForceIgnoreOutsideTouch && !mDropDownAlwaysVisible);
mPopup.update(getAnchorView(), mDropDownHorizontalOffset, mDropDownVerticalOffset, widthSpec, heightSpec);
} else {
if (mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT) {
widthSpec = ViewGroup.LayoutParams.MATCH_PARENT;
} else {
if (mDropDownWidth == ViewGroup.LayoutParams.WRAP_CONTENT) {
mPopup.setWidth(getAnchorView().getWidth());
} else {
mPopup.setWidth(mDropDownWidth);
}
}
if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) {
heightSpec = ViewGroup.LayoutParams.MATCH_PARENT;
} else {
if (mDropDownHeight == ViewGroup.LayoutParams.WRAP_CONTENT) {
mPopup.setHeight(height);
} else {
mPopup.setHeight(mDropDownHeight);
}
}
mPopup.setWindowLayoutMode(widthSpec, heightSpec);
// mPopup.setClipToScreenEnabled(true); might be important aap
// use outside touchable to dismiss drop down when touching outside
// of it, so
// only set this if the dropdown is not always visible
mPopup.setOutsideTouchable(!mForceIgnoreOutsideTouch && !mDropDownAlwaysVisible);
mPopup.setTouchInterceptor(mTouchInterceptor);
mPopup.showAsDropDown(getAnchorView(), mDropDownHorizontalOffset, mDropDownVerticalOffset);
mDropDownList.setSelection(ListView.INVALID_POSITION);
if (!mModal || mDropDownList.isInTouchMode()) {
clearListSelection();
}
if (!mModal) {
mHandler.post(mHideSelector);
}
}
}
/**
* <p>
* Builds the popup window's content and returns the height the popup should
* have. Returns -1 when the content already exists.
* </p>
*
* @return the content's height or -1 if content already exists
*/
private int buildDropDown() {
ViewGroup dropDownView;
int otherHeights = 0;
if (mDropDownList == null) {
final Context context = mContext;
/**
* This Runnable exists for the sole purpose of checking if the view
* layout has got completed and if so call showDropDown to display
* the drop down. This is used to show the drop down as soon as
* possible after user opens up the search dialog, without waiting
* for the normal UI pipeline to do it's job which is slower than
* this method.
*/
mShowDropDownRunnable = new Runnable() {
@Override
public void run() {
// View layout should be all done before displaying the drop
// down.
final View view = getAnchorView();
if (view != null && view.getWindowToken() != null) {
show();
}
}
};
mDropDownList = new DropDownListView(context, !mModal);
if (mDropDownListHighlight != null) {
mDropDownList.setSelector(mDropDownListHighlight);
}
mDropDownList.setAdapter(mAdapter);
mDropDownList.setOnItemClickListener(mItemClickListener);
mDropDownList.setFocusable(true);
mDropDownList.setFocusableInTouchMode(true);
mDropDownList.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(final AdapterView<?> parent, final View view, final int position,
final long id) {
if (position != -1) {
final DropDownListView dropDownList = mDropDownList;
if (dropDownList != null) {
dropDownList.mListSelectionHidden = false;
}
}
}
@Override
public void onNothingSelected(final AdapterView<?> parent) {
}
});
// mDropDownList.setOnScrollListener(mScrollListener);
if (mItemSelectedListener != null) {
mDropDownList.setOnItemSelectedListener(mItemSelectedListener);
}
dropDownView = mDropDownList;
final View hintView = mPromptView;
if (hintView != null) {
// if an hint has been specified, we accomodate more space for
// it and
// add a text view in the drop down menu, at the bottom of the
// list
final LinearLayout hintContainer = new LinearLayout(context);
hintContainer.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams hintParams = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 0, 1.0f);
switch (mPromptPosition) {
case POSITION_PROMPT_BELOW:
hintContainer.addView(dropDownView, hintParams);
hintContainer.addView(hintView);
break;
case POSITION_PROMPT_ABOVE:
hintContainer.addView(hintView);
hintContainer.addView(dropDownView, hintParams);
break;
default:
Log.e(TAG, "Invalid hint position " + mPromptPosition);
break;
}
// measure the hint's height to find how much more vertical
// space
// we need to add to the drop down's height
final int widthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.AT_MOST);
final int heightSpec = MeasureSpec.UNSPECIFIED;
hintView.measure(widthSpec, heightSpec);
hintParams = (LinearLayout.LayoutParams) hintView.getLayoutParams();
otherHeights = hintView.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin;
dropDownView = hintContainer;
}
mPopup.setContentView(dropDownView);
} else {
dropDownView = (ViewGroup) mPopup.getContentView();
final View view = mPromptView;
if (view != null) {
final LinearLayout.LayoutParams hintParams = (LinearLayout.LayoutParams) view.getLayoutParams();
otherHeights = view.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin;
}
}
// getMaxAvailableHeight() subtracts the padding, so we put it back
// to get the available height for the whole window
int padding = 0;
final Drawable background = mPopup.getBackground();
if (background != null) {
background.getPadding(mTempRect);
padding = mTempRect.top + mTempRect.bottom;
// If we don't have an explicit vertical offset, determine one from
// the window
// background so that content will line up.
if (!mDropDownVerticalOffsetSet) {
mDropDownVerticalOffset = -mTempRect.top;
}
}
final int maxHeight = mPopup.getMaxAvailableHeight(getAnchorView(), mDropDownVerticalOffset);
if (mDropDownAlwaysVisible || mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT)
return maxHeight + padding;
final int listContent = measureHeightOfChildren(MeasureSpec.UNSPECIFIED, 0, NO_POSITION, maxHeight
- otherHeights, -1);
// add padding only if the list has items in it, that way we don't show
// the popup if it is not needed
if (listContent > 0) {
otherHeights += padding;
}
return listContent + otherHeights;
}
private void measureScrapChild(final View child, final int position, final int widthMeasureSpec, final Rect padding) {
LayoutParams p = (LayoutParams) child.getLayoutParams();
if (p == null) {
p = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0);
child.setLayoutParams(p);
}
// p.viewType = mAdapter.getItemViewType(position);
// p.forceAdd = true;
final int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec, padding.left + padding.right,
p.width);
final int lpHeight = p.height;
int childHeightSpec;
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}
private void removePromptView() {
if (mPromptView != null) {
final ViewParent parent = mPromptView.getParent();
if (parent instanceof ViewGroup) {
final ViewGroup group = (ViewGroup) parent;
group.removeView(mPromptView);
}
}
}
/**
* This method borrowed from ICS ListView.
*
* Measures the height of the given range of children (inclusive) and
* returns the height with this ListView's padding and divider heights
* included. If maxHeight is provided, the measuring will stop when the
* current height reaches maxHeight.
*
* @param widthMeasureSpec The width measure spec to be given to a child's
* {@link View#measure(int, int)}.
* @param startPosition The position of the first child to be shown.
* @param endPosition The (inclusive) position of the last child to be
* shown. Specify {@link #NO_POSITION} if the last child should
* be the last available child from the adapter.
* @param maxHeight The maximum height that will be returned (if all the
* children don't fit in this value, this value will be
* returned).
* @param disallowPartialChildPosition In general, whether the returned
* height should only contain entire children. This is more
* powerful--it is the first inclusive position at which partial
* children will not be allowed. Example: it looks nice to have
* at least 3 completely visible children, and in portrait this
* will most likely fit; but in landscape there could be times
* when even 2 children can not be completely shown, so a value
* of 2 (remember, inclusive) would be good (assuming
* startPosition is 0).
* @return The height of this ListView with the given children.
*/
final int measureHeightOfChildren(final int widthMeasureSpec, final int startPosition, int endPosition,
final int maxHeight, final int disallowPartialChildPosition) {
final Rect padding = new Rect();
// not sure if this is the right padding to use...
mPopup.getBackground().getPadding(padding);
final ListAdapter adapter = mAdapter;
if (adapter == null) return padding.top + padding.bottom;
// Include the padding of the list
int returnedHeight = padding.top + padding.bottom;
final int dividerHeight = 0; // ((mDividerHeight > 0) && mDivider !=
// null) ? mDividerHeight : 0;
// The previous height value that was less than maxHeight and contained
// no partial children
int prevHeightWithoutPartialChild = 0;
int i;
View child;
// mItemCount - 1 since endPosition parameter is inclusive
endPosition = endPosition == NO_POSITION ? adapter.getCount() - 1 : endPosition;
// final AbsListView.RecycleBin recycleBin = mRecycler;
// final boolean recyle = recycleOnMeasure();
// final boolean[] isScrap = mIsScrap;
for (i = startPosition; i <= endPosition; ++i) {
// child = mDropDownList.obtainView(i);
child = mAdapter.getView(i, null, mDropDownList);
measureScrapChild(child, i, widthMeasureSpec, padding);
if (i > 0) {
// Count the divider for all but one child
returnedHeight += dividerHeight;
}
// Recycle the view before we possibly return from the method
// if (recyle && recycleBin.shouldRecycleViewType(
// ((LayoutParams) child.getLayoutParams()).viewType)) {
// recycleBin.addScrapView(child, -1);
// }
returnedHeight += child.getMeasuredHeight();
if (returnedHeight >= maxHeight) // We went over, figure out which
// height to return. If
// returnedHeight > maxHeight,
// then the i'th position did not fit completely.
return disallowPartialChildPosition >= 0 // Disallowing is
// enabled (> -1)
&& i > disallowPartialChildPosition // We've past the
// min pos
&& prevHeightWithoutPartialChild > 0 // We have a prev
// height
&& returnedHeight != maxHeight // i'th child did not
// fit completely
? prevHeightWithoutPartialChild : maxHeight;
if (disallowPartialChildPosition >= 0 && i >= disallowPartialChildPosition) {
prevHeightWithoutPartialChild = returnedHeight;
}
}
// At this point, we went through the range of children, and they each
// completely fit, so return the returnedHeight
return returnedHeight;
}
/**
* The maximum number of list items that can be visible and still have the
* list expand when touched.
*
* @param max Max number of items that can be visible and still allow the
* list to expand.
*/
void setListItemExpandMax(final int max) {
mListItemExpandMaximum = max;
}
/**
* <p>
* Wrapper class for a ListView. This wrapper can hijack the focus to make
* sure the list uses the appropriate drawables and states when displayed on
* screen within a drop down. The focus is never actually passed to the drop
* down in this mode; the list only looks focused.
* </p>
*/
private static class DropDownListView extends ListView {
/*
* WARNING: This is a workaround for a touch mode issue.
*
* Touch mode is propagated lazily to windows. This causes problems in
* the following scenario: - Type something in the AutoCompleteTextView
* and get some results - Move down with the d-pad to select an item in
* the list - Move up with the d-pad until the selection disappears -
* Type more text in the AutoCompleteTextView *using the soft keyboard*
* and get new results; you are now in touch mode - The selection comes
* back on the first item in the list, even though the list is supposed
* to be in touch mode
*
* Using the soft keyboard triggers the touch mode change but that
* change is propagated to our window only after the first list layout,
* therefore after the list attempts to resurrect the selection.
*
* The trick to work around this issue is to pretend the list is in
* touch mode when we know that the selection should not appear, that is
* when we know the user moved the selection away from the list.
*
* This boolean is set to true whenever we explicitly hide the list's
* selection and reset to false whenever we know the user moved the
* selection back to the list.
*
* When this boolean is true, isInTouchMode() returns true, otherwise it
* returns super.isInTouchMode().
*/
private boolean mListSelectionHidden;
/**
* True if this wrapper should fake focus.
*/
private final boolean mHijackFocus;
/**
* <p>
* Creates a new list view wrapper.
* </p>
*
* @param context this view's context
*/
public DropDownListView(final Context context, final boolean hijackFocus) {
super(context, null, android.R.attr.dropDownListViewStyle);
mHijackFocus = hijackFocus;
// setCacheColorHint(0);
setPadding(0, 0, 0, 0);
}
/**
* <p>
* Returns the focus state in the drop down.
* </p>
*
* @return true always if hijacking focus
*/
@Override
public boolean hasFocus() {
return mHijackFocus || super.hasFocus();
}
/**
* <p>
* Returns the focus state in the drop down.
* </p>
*
* @return true always if hijacking focus
*/
@Override
public boolean hasWindowFocus() {
return mHijackFocus || super.hasWindowFocus();
}
/**
* <p>
* Returns the focus state in the drop down.
* </p>
*
* @return true always if hijacking focus
*/
@Override
public boolean isFocused() {
return mHijackFocus || super.isFocused();
}
@Override
public boolean isInTouchMode() {
// WARNING: Please read the comment where mListSelectionHidden is
// declared
return mHijackFocus && mListSelectionHidden || super.isInTouchMode();
}
}
private class ListSelectorHider implements Runnable {
@Override
public void run() {
clearListSelection();
}
}
private class PopupDataSetObserver extends DataSetObserver {
@Override
public void onChanged() {
if (isShowing()) {
// Resize the popup to fit new content
show();
}
}
@Override
public void onInvalidated() {
dismiss();
}
}
private class PopupTouchInterceptor implements OnTouchListener {
@Override
public boolean onTouch(final View v, final MotionEvent event) {
final int action = event.getAction();
final int x = (int) event.getX();
final int y = (int) event.getY();
if (action == MotionEvent.ACTION_DOWN && mPopup != null && mPopup.isShowing() && x >= 0
&& x < mPopup.getWidth() && y >= 0 && y < mPopup.getHeight()) {
mHandler.postDelayed(mResizePopupRunnable, EXPAND_LIST_TIMEOUT);
} else if (action == MotionEvent.ACTION_UP) {
mHandler.removeCallbacks(mResizePopupRunnable);
}
return false;
}
}
private class ResizePopupRunnable implements Runnable {
@Override
public void run() {
if (mDropDownList != null && mDropDownList.getCount() > mDropDownList.getChildCount()
&& mDropDownList.getChildCount() <= mListItemExpandMaximum) {
mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
show();
}
}
}
@SuppressLint("NewApi")
static class OnKeyPreImeAccessor {
public static boolean onKeyPreIme(final ListPopupWindowCompat window, final int keyCode, final KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && window.isShowing()) {
// special case for the back key, we do not even try to send it
// to the drop down list but instead, consume it immediately
final View anchorView = window.mDropDownAnchorView;
if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
final KeyEvent.DispatcherState state = anchorView.getKeyDispatcherState();
if (state != null) {
state.startTracking(event, window);
}
return true;
} else if (event.getAction() == KeyEvent.ACTION_UP) {
final KeyEvent.DispatcherState state = anchorView.getKeyDispatcherState();
if (state != null) {
state.handleUpEvent(event);
}
if (event.isTracking() && !event.isCanceled()) {
window.dismiss();
return true;
}
}
}
return false;
}
}
}