| /* |
| * 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 android.widget; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.ObjectAnimator; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.database.DataSetObserver; |
| import android.graphics.Rect; |
| import android.graphics.drawable.Drawable; |
| import android.os.Handler; |
| import android.os.SystemClock; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.util.IntProperty; |
| import android.util.Log; |
| import android.view.Gravity; |
| 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.ViewConfiguration; |
| import android.view.ViewGroup; |
| import android.view.ViewParent; |
| import android.view.WindowManager; |
| import android.view.animation.AccelerateDecelerateInterpolator; |
| |
| import com.android.internal.R; |
| import com.android.internal.widget.AutoScrollHelper.AbsListViewAutoScroller; |
| |
| import java.util.Locale; |
| |
| /** |
| * 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 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 Context mContext; |
| private 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 int mDropDownWindowLayoutType = WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL; |
| private boolean mDropDownVerticalOffsetSet; |
| |
| private int mDropDownGravity = Gravity.NO_GRAVITY; |
| |
| 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; |
| |
| private Rect mTempRect = new Rect(); |
| |
| private boolean mModal; |
| |
| private int mLayoutDirection; |
| |
| /** |
| * The provided prompt view should appear above list content. |
| * |
| * @see #setPromptPosition(int) |
| * @see #getPromptPosition() |
| * @see #setPromptView(View) |
| */ |
| public static final int POSITION_PROMPT_ABOVE = 0; |
| |
| /** |
| * The provided prompt view should appear below list content. |
| * |
| * @see #setPromptPosition(int) |
| * @see #getPromptPosition() |
| * @see #setPromptView(View) |
| */ |
| public static final int POSITION_PROMPT_BELOW = 1; |
| |
| /** |
| * Alias for {@link ViewGroup.LayoutParams#MATCH_PARENT}. |
| * If used to specify a popup width, the popup will match the width of the anchor view. |
| * If used to specify a popup height, the popup will fill available space. |
| */ |
| public static final int MATCH_PARENT = ViewGroup.LayoutParams.MATCH_PARENT; |
| |
| /** |
| * Alias for {@link ViewGroup.LayoutParams#WRAP_CONTENT}. |
| * If used to specify a popup width, the popup will use the width of its content. |
| */ |
| public static final int WRAP_CONTENT = ViewGroup.LayoutParams.WRAP_CONTENT; |
| |
| /** |
| * Mode for {@link #setInputMethodMode(int)}: the requirements for the |
| * input method should be based on the focusability of the popup. That is |
| * if it is focusable than it needs to work with the input method, else |
| * it doesn't. |
| */ |
| public static final int INPUT_METHOD_FROM_FOCUSABLE = PopupWindow.INPUT_METHOD_FROM_FOCUSABLE; |
| |
| /** |
| * Mode for {@link #setInputMethodMode(int)}: this popup always needs to |
| * work with an input method, regardless of whether it is focusable. This |
| * means that it will always be displayed so that the user can also operate |
| * the input method while it is shown. |
| */ |
| public static final int INPUT_METHOD_NEEDED = PopupWindow.INPUT_METHOD_NEEDED; |
| |
| /** |
| * Mode for {@link #setInputMethodMode(int)}: this popup never needs to |
| * work with an input method, regardless of whether it is focusable. This |
| * means that it will always be displayed to use as much space on the |
| * screen as needed, regardless of whether this covers the input method. |
| */ |
| public static final int INPUT_METHOD_NOT_NEEDED = PopupWindow.INPUT_METHOD_NOT_NEEDED; |
| |
| /** |
| * 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 ListPopupWindow(Context context) { |
| this(context, null, com.android.internal.R.attr.listPopupWindowStyle, 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 ListPopupWindow(Context context, AttributeSet attrs) { |
| this(context, attrs, com.android.internal.R.attr.listPopupWindowStyle, 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 ListPopupWindow(Context context, AttributeSet attrs, 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 ListPopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| mContext = context; |
| mHandler = new Handler(context.getMainLooper()); |
| |
| final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ListPopupWindow, |
| defStyleAttr, defStyleRes); |
| mDropDownHorizontalOffset = a.getDimensionPixelOffset( |
| R.styleable.ListPopupWindow_dropDownHorizontalOffset, 0); |
| mDropDownVerticalOffset = a.getDimensionPixelOffset( |
| R.styleable.ListPopupWindow_dropDownVerticalOffset, 0); |
| if (mDropDownVerticalOffset != 0) { |
| mDropDownVerticalOffsetSet = true; |
| } |
| a.recycle(); |
| |
| mPopup = new PopupWindow(context, attrs, defStyleAttr, defStyleRes); |
| mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); |
| // Set the default layout direction to match the default locale one |
| final Locale locale = mContext.getResources().getConfiguration().locale; |
| mLayoutDirection = TextUtils.getLayoutDirectionFromLocale(locale); |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setAdapter(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); |
| } |
| } |
| |
| /** |
| * 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 |
| */ |
| public void setPromptPosition(int position) { |
| mPromptPosition = position; |
| } |
| |
| /** |
| * @return Where the optional prompt view should appear. |
| * |
| * @see #POSITION_PROMPT_ABOVE |
| * @see #POSITION_PROMPT_BELOW |
| */ |
| public int getPromptPosition() { |
| return mPromptPosition; |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setModal(boolean modal) { |
| mModal = modal; |
| mPopup.setFocusable(modal); |
| } |
| |
| /** |
| * Returns whether the popup window will be modal when shown. |
| * |
| * @return {@code true} if the popup window will be modal, {@code false} otherwise. |
| */ |
| public boolean isModal() { |
| return mModal; |
| } |
| |
| /** |
| * 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(boolean forceIgnoreOutsideTouch) { |
| mForceIgnoreOutsideTouch = forceIgnoreOutsideTouch; |
| } |
| |
| /** |
| * 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(boolean dropDownAlwaysVisible) { |
| mDropDownAlwaysVisible = dropDownAlwaysVisible; |
| } |
| |
| /** |
| * @return Whether the drop-down is visible under special conditions. |
| * |
| * @hide Only used by AutoCompleteTextView under special conditions. |
| */ |
| public boolean isDropDownAlwaysVisible() { |
| return mDropDownAlwaysVisible; |
| } |
| |
| /** |
| * 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() |
| */ |
| public void setSoftInputMode(int mode) { |
| mPopup.setSoftInputMode(mode); |
| } |
| |
| /** |
| * Returns the current value in {@link #setSoftInputMode(int)}. |
| * |
| * @see #setSoftInputMode(int) |
| * @see android.view.WindowManager.LayoutParams#softInputMode |
| */ |
| public int getSoftInputMode() { |
| return mPopup.getSoftInputMode(); |
| } |
| |
| /** |
| * Sets a drawable to use as the list item selector. |
| * |
| * @param selector List selector drawable to use in the popup. |
| */ |
| public void setListSelector(Drawable selector) { |
| mDropDownListHighlight = selector; |
| } |
| |
| /** |
| * @return The background drawable for the popup window. |
| */ |
| public Drawable getBackground() { |
| return mPopup.getBackground(); |
| } |
| |
| /** |
| * Sets a drawable to be the background for the popup window. |
| * |
| * @param d A drawable to set as the background. |
| */ |
| public void setBackgroundDrawable(Drawable d) { |
| mPopup.setBackgroundDrawable(d); |
| } |
| |
| /** |
| * Set an animation style to use when the popup window is shown or dismissed. |
| * |
| * @param animationStyle Animation style to use. |
| */ |
| public void setAnimationStyle(int animationStyle) { |
| mPopup.setAnimationStyle(animationStyle); |
| } |
| |
| /** |
| * Returns the animation style that will be used when the popup window is |
| * shown or dismissed. |
| * |
| * @return Animation style that will be used. |
| */ |
| public int getAnimationStyle() { |
| return mPopup.getAnimationStyle(); |
| } |
| |
| /** |
| * Returns the view that will be used to anchor this popup. |
| * |
| * @return The popup's anchor view |
| */ |
| public View getAnchorView() { |
| return mDropDownAnchorView; |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setAnchorView(View anchor) { |
| mDropDownAnchorView = anchor; |
| } |
| |
| /** |
| * @return The horizontal offset of the popup from its anchor in pixels. |
| */ |
| public int getHorizontalOffset() { |
| return mDropDownHorizontalOffset; |
| } |
| |
| /** |
| * Set the horizontal offset of this popup from its anchor view in pixels. |
| * |
| * @param offset The horizontal offset of the popup from its anchor. |
| */ |
| public void setHorizontalOffset(int offset) { |
| mDropDownHorizontalOffset = offset; |
| } |
| |
| /** |
| * @return The vertical offset of the popup from its anchor in pixels. |
| */ |
| public int getVerticalOffset() { |
| if (!mDropDownVerticalOffsetSet) { |
| return 0; |
| } |
| return mDropDownVerticalOffset; |
| } |
| |
| /** |
| * Set the vertical offset of this popup from its anchor view in pixels. |
| * |
| * @param offset The vertical offset of the popup from its anchor. |
| */ |
| public void setVerticalOffset(int offset) { |
| mDropDownVerticalOffset = offset; |
| mDropDownVerticalOffsetSet = true; |
| } |
| |
| /** |
| * Set the gravity of the dropdown list. This is commonly used to |
| * set gravity to START or END for alignment with the anchor. |
| * |
| * @param gravity Gravity value to use |
| */ |
| public void setDropDownGravity(int gravity) { |
| mDropDownGravity = gravity; |
| } |
| |
| /** |
| * @return The width of the popup window in pixels. |
| */ |
| public int getWidth() { |
| return mDropDownWidth; |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setWidth(int width) { |
| mDropDownWidth = width; |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setContentWidth(int width) { |
| Drawable popupBackground = mPopup.getBackground(); |
| if (popupBackground != null) { |
| popupBackground.getPadding(mTempRect); |
| mDropDownWidth = mTempRect.left + mTempRect.right + width; |
| } else { |
| setWidth(width); |
| } |
| } |
| |
| /** |
| * @return The height of the popup window in pixels. |
| */ |
| public int getHeight() { |
| return mDropDownHeight; |
| } |
| |
| /** |
| * Sets the height of the popup window in pixels. Can also be {@link #MATCH_PARENT}. |
| * |
| * @param height Height of the popup window. |
| */ |
| public void setHeight(int height) { |
| mDropDownHeight = height; |
| } |
| |
| /** |
| * Set the layout type for this popup window. |
| * <p> |
| * See {@link WindowManager.LayoutParams#type} for possible values. |
| * |
| * @param layoutType Layout type for this window. |
| * |
| * @see WindowManager.LayoutParams#type |
| */ |
| public void setWindowLayoutType(int layoutType) { |
| mDropDownWindowLayoutType = layoutType; |
| } |
| |
| /** |
| * Sets a listener to receive events when a list item is clicked. |
| * |
| * @param clickListener Listener to register |
| * |
| * @see ListView#setOnItemClickListener(android.widget.AdapterView.OnItemClickListener) |
| */ |
| public void setOnItemClickListener(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) |
| */ |
| public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener selectedListener) { |
| mItemSelectedListener = selectedListener; |
| } |
| |
| /** |
| * 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. |
| */ |
| public void setPromptView(View prompt) { |
| boolean showing = isShowing(); |
| if (showing) { |
| removePromptView(); |
| } |
| mPromptView = prompt; |
| if (showing) { |
| show(); |
| } |
| } |
| |
| /** |
| * Post a {@link #show()} call to the UI thread. |
| */ |
| public void postShow() { |
| mHandler.post(mShowDropDownRunnable); |
| } |
| |
| /** |
| * Show the popup list. If the list is already showing, this method |
| * will recalculate the popup's size and position. |
| */ |
| public void show() { |
| int height = buildDropDown(); |
| |
| final boolean noInputMethod = isInputMethodNotNeeded(); |
| mPopup.setAllowScrollingAnchorParent(!noInputMethod); |
| mPopup.setWindowLayoutType(mDropDownWindowLayoutType); |
| |
| if (mPopup.isShowing()) { |
| final int widthSpec; |
| 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; |
| } |
| |
| final int heightSpec; |
| 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.setWidth(mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? |
| ViewGroup.LayoutParams.MATCH_PARENT : 0); |
| mPopup.setHeight(0); |
| } else { |
| mPopup.setWidth(mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? |
| ViewGroup.LayoutParams.MATCH_PARENT : 0); |
| mPopup.setHeight(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 < 0)? -1 : widthSpec, |
| (heightSpec < 0)? -1 : heightSpec); |
| } else { |
| final int widthSpec; |
| if (mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT) { |
| widthSpec = ViewGroup.LayoutParams.MATCH_PARENT; |
| } else { |
| if (mDropDownWidth == ViewGroup.LayoutParams.WRAP_CONTENT) { |
| widthSpec = getAnchorView().getWidth(); |
| } else { |
| widthSpec = mDropDownWidth; |
| } |
| } |
| |
| final int heightSpec; |
| if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) { |
| heightSpec = ViewGroup.LayoutParams.MATCH_PARENT; |
| } else { |
| if (mDropDownHeight == ViewGroup.LayoutParams.WRAP_CONTENT) { |
| heightSpec = height; |
| } else { |
| heightSpec = mDropDownHeight; |
| } |
| } |
| |
| mPopup.setWidth(widthSpec); |
| mPopup.setHeight(heightSpec); |
| mPopup.setClipToScreenEnabled(true); |
| |
| // 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, mDropDownGravity); |
| mDropDownList.setSelection(ListView.INVALID_POSITION); |
| |
| if (!mModal || mDropDownList.isInTouchMode()) { |
| clearListSelection(); |
| } |
| if (!mModal) { |
| mHandler.post(mHideSelector); |
| } |
| } |
| } |
| |
| /** |
| * Dismiss the popup window. |
| */ |
| public void dismiss() { |
| mPopup.dismiss(); |
| removePromptView(); |
| mPopup.setContentView(null); |
| mDropDownList = null; |
| mHandler.removeCallbacks(mResizePopupRunnable); |
| } |
| |
| /** |
| * Set a listener to receive a callback when the popup is dismissed. |
| * |
| * @param listener Listener that will be notified when the popup is dismissed. |
| */ |
| public void setOnDismissListener(PopupWindow.OnDismissListener listener) { |
| mPopup.setOnDismissListener(listener); |
| } |
| |
| private void removePromptView() { |
| if (mPromptView != null) { |
| final ViewParent parent = mPromptView.getParent(); |
| if (parent instanceof ViewGroup) { |
| final ViewGroup group = (ViewGroup) parent; |
| group.removeView(mPromptView); |
| } |
| } |
| } |
| |
| /** |
| * 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() |
| */ |
| public void setInputMethodMode(int mode) { |
| mPopup.setInputMethodMode(mode); |
| } |
| |
| /** |
| * Return the current value in {@link #setInputMethodMode(int)}. |
| * |
| * @see #setInputMethodMode(int) |
| */ |
| public int getInputMethodMode() { |
| return mPopup.getInputMethodMode(); |
| } |
| |
| /** |
| * Set the selected position of the list. |
| * Only valid when {@link #isShowing()} == {@code true}. |
| * |
| * @param position List position to set as selected. |
| */ |
| public void setSelection(int position) { |
| DropDownListView list = mDropDownList; |
| if (isShowing() && list != null) { |
| list.mListSelectionHidden = false; |
| list.setSelection(position); |
| if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) { |
| list.setItemChecked(position, true); |
| } |
| } |
| } |
| |
| /** |
| * Clear any current list selection. |
| * Only valid when {@link #isShowing()} == {@code true}. |
| */ |
| 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(); |
| } |
| } |
| |
| /** |
| * @return {@code true} if the popup is currently showing, {@code false} otherwise. |
| */ |
| public boolean isShowing() { |
| return mPopup.isShowing(); |
| } |
| |
| /** |
| * @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. |
| */ |
| public boolean isInputMethodNotNeeded() { |
| return mPopup.getInputMethodMode() == INPUT_METHOD_NOT_NEEDED; |
| } |
| |
| /** |
| * 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.) |
| */ |
| public boolean performItemClick(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; |
| } |
| |
| /** |
| * @return The currently selected item or null if the popup is not showing. |
| */ |
| public Object getSelectedItem() { |
| if (!isShowing()) { |
| return null; |
| } |
| return mDropDownList.getSelectedItem(); |
| } |
| |
| /** |
| * @return The position of the currently selected item or {@link ListView#INVALID_POSITION} |
| * if {@link #isShowing()} == {@code false}. |
| * |
| * @see ListView#getSelectedItemPosition() |
| */ |
| public int getSelectedItemPosition() { |
| if (!isShowing()) { |
| return ListView.INVALID_POSITION; |
| } |
| return mDropDownList.getSelectedItemPosition(); |
| } |
| |
| /** |
| * @return The ID of the currently selected item or {@link ListView#INVALID_ROW_ID} |
| * if {@link #isShowing()} == {@code false}. |
| * |
| * @see ListView#getSelectedItemId() |
| */ |
| public long getSelectedItemId() { |
| if (!isShowing()) { |
| return ListView.INVALID_ROW_ID; |
| } |
| return mDropDownList.getSelectedItemId(); |
| } |
| |
| /** |
| * @return The View for the currently selected item or null if |
| * {@link #isShowing()} == {@code false}. |
| * |
| * @see ListView#getSelectedView() |
| */ |
| public View getSelectedView() { |
| if (!isShowing()) { |
| return null; |
| } |
| return mDropDownList.getSelectedView(); |
| } |
| |
| /** |
| * @return The {@link ListView} displayed within the popup window. |
| * Only valid when {@link #isShowing()} == {@code true}. |
| */ |
| public ListView getListView() { |
| return mDropDownList; |
| } |
| |
| /** |
| * 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(int max) { |
| mListItemExpandMaximum = max; |
| } |
| |
| /** |
| * 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(int keyCode, 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 |
| || !KeyEvent.isConfirmKey(keyCode))) { |
| int curIndex = mDropDownList.getSelectedItemPosition(); |
| boolean consumed; |
| |
| final boolean below = !mPopup.isAboveAnchor(); |
| |
| final ListAdapter adapter = mAdapter; |
| |
| boolean allEnabled; |
| int firstItem = Integer.MAX_VALUE; |
| int lastItem = Integer.MIN_VALUE; |
| |
| if (adapter != null) { |
| allEnabled = adapter.areAllItemsEnabled(); |
| 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 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(int keyCode, KeyEvent event) { |
| if (isShowing() && mDropDownList.getSelectedItemPosition() >= 0) { |
| boolean consumed = mDropDownList.onKeyUp(keyCode, event); |
| if (consumed && KeyEvent.isConfirmKey(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 |
| dismiss(); |
| } |
| return consumed; |
| } |
| 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(int keyCode, KeyEvent event) { |
| if (keyCode == KeyEvent.KEYCODE_BACK && 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 = mDropDownAnchorView; |
| if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) { |
| KeyEvent.DispatcherState state = anchorView.getKeyDispatcherState(); |
| if (state != null) { |
| state.startTracking(event, this); |
| } |
| return true; |
| } else if (event.getAction() == KeyEvent.ACTION_UP) { |
| KeyEvent.DispatcherState state = anchorView.getKeyDispatcherState(); |
| if (state != null) { |
| state.handleUpEvent(event); |
| } |
| if (event.isTracking() && !event.isCanceled()) { |
| dismiss(); |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns an {@link OnTouchListener} that can be added to the source view |
| * to implement drag-to-open behavior. Generally, the source view should be |
| * the same view that was passed to {@link #setAnchorView}. |
| * <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> |
| * ListPopupWindow myPopup = new ListPopupWindow(context); |
| * myPopup.setAnchor(myAnchor); |
| * OnTouchListener dragListener = myPopup.createDragToOpenListener(myAnchor); |
| * myAnchor.setOnTouchListener(dragListener); |
| * </pre> |
| * |
| * @param src the view on which the resulting listener will be set |
| * @return a touch listener that controls drag-to-open behavior |
| */ |
| public OnTouchListener createDragToOpenListener(View src) { |
| return new ForwardingListener(src) { |
| @Override |
| public ListPopupWindow getPopup() { |
| return ListPopupWindow.this; |
| } |
| }; |
| } |
| |
| /** |
| * <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) { |
| 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() { |
| public void run() { |
| // View layout should be all done before displaying the drop down. |
| 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() { |
| public void onItemSelected(AdapterView<?> parent, View view, |
| int position, long id) { |
| |
| if (position != -1) { |
| DropDownListView dropDownList = mDropDownList; |
| |
| if (dropDownList != null) { |
| dropDownList.mListSelectionHidden = false; |
| } |
| } |
| } |
| |
| public void onNothingSelected(AdapterView<?> parent) { |
| } |
| }); |
| mDropDownList.setOnScrollListener(mScrollListener); |
| |
| if (mItemSelectedListener != null) { |
| mDropDownList.setOnItemSelectedListener(mItemSelectedListener); |
| } |
| |
| dropDownView = mDropDownList; |
| |
| View hintView = mPromptView; |
| if (hintView != null) { |
| // if a 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 |
| 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 |
| int widthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.AT_MOST); |
| 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) { |
| 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; |
| 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; |
| } |
| } else { |
| mTempRect.setEmpty(); |
| } |
| |
| // Max height available on the screen for a popup. |
| boolean ignoreBottomDecorations = |
| mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED; |
| final int maxHeight = mPopup.getMaxAvailableHeight( |
| getAnchorView(), mDropDownVerticalOffset, ignoreBottomDecorations); |
| |
| if (mDropDownAlwaysVisible || mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) { |
| return maxHeight + padding; |
| } |
| |
| final int childWidthSpec; |
| switch (mDropDownWidth) { |
| case ViewGroup.LayoutParams.WRAP_CONTENT: |
| childWidthSpec = MeasureSpec.makeMeasureSpec( |
| mContext.getResources().getDisplayMetrics().widthPixels - |
| (mTempRect.left + mTempRect.right), |
| MeasureSpec.AT_MOST); |
| break; |
| case ViewGroup.LayoutParams.MATCH_PARENT: |
| childWidthSpec = MeasureSpec.makeMeasureSpec( |
| mContext.getResources().getDisplayMetrics().widthPixels - |
| (mTempRect.left + mTempRect.right), |
| MeasureSpec.EXACTLY); |
| break; |
| default: |
| childWidthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.EXACTLY); |
| break; |
| } |
| final int listContent = mDropDownList.measureHeightOfChildren(childWidthSpec, |
| 0, ListView.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; |
| } |
| |
| /** |
| * Abstract class that forwards touch events to a {@link ListPopupWindow}. |
| * |
| * @hide |
| */ |
| public static abstract class ForwardingListener |
| implements View.OnTouchListener, View.OnAttachStateChangeListener { |
| /** Scaled touch slop, used for detecting movement outside bounds. */ |
| private final float mScaledTouchSlop; |
| |
| /** Timeout before disallowing intercept on the source's parent. */ |
| private final int mTapTimeout; |
| |
| /** Timeout before accepting a long-press to start forwarding. */ |
| private final int mLongPressTimeout; |
| |
| /** Source view from which events are forwarded. */ |
| private final View mSrc; |
| |
| /** Runnable used to prevent conflicts with scrolling parents. */ |
| private Runnable mDisallowIntercept; |
| |
| /** Runnable used to trigger forwarding on long-press. */ |
| private Runnable mTriggerLongPress; |
| |
| /** Whether this listener is currently forwarding touch events. */ |
| private boolean mForwarding; |
| |
| /** |
| * Whether forwarding was initiated by a long-press. If so, we won't |
| * force the window to dismiss when the touch stream ends. |
| */ |
| private boolean mWasLongPress; |
| |
| /** The id of the first pointer down in the current event stream. */ |
| private int mActivePointerId; |
| |
| public ForwardingListener(View src) { |
| mSrc = src; |
| mScaledTouchSlop = ViewConfiguration.get(src.getContext()).getScaledTouchSlop(); |
| mTapTimeout = ViewConfiguration.getTapTimeout(); |
| |
| // Use a medium-press timeout. Halfway between tap and long-press. |
| mLongPressTimeout = (mTapTimeout + ViewConfiguration.getLongPressTimeout()) / 2; |
| |
| src.addOnAttachStateChangeListener(this); |
| } |
| |
| /** |
| * Returns the popup to which this listener is forwarding events. |
| * <p> |
| * Override this to return the correct popup. If the popup is displayed |
| * asynchronously, you may also need to override |
| * {@link #onForwardingStopped} to prevent premature cancelation of |
| * forwarding. |
| * |
| * @return the popup to which this listener is forwarding events |
| */ |
| public abstract ListPopupWindow getPopup(); |
| |
| @Override |
| public boolean onTouch(View v, MotionEvent event) { |
| final boolean wasForwarding = mForwarding; |
| final boolean forwarding; |
| if (wasForwarding) { |
| forwarding = onTouchForwarded(event) || !onForwardingStopped(); |
| } else { |
| forwarding = onTouchObserved(event) && onForwardingStarted(); |
| |
| if (forwarding) { |
| // Make sure we cancel any ongoing source event stream. |
| final long now = SystemClock.uptimeMillis(); |
| final MotionEvent e = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, |
| 0.0f, 0.0f, 0); |
| mSrc.onTouchEvent(e); |
| e.recycle(); |
| } |
| } |
| |
| mForwarding = forwarding; |
| return forwarding || wasForwarding; |
| } |
| |
| @Override |
| public void onViewAttachedToWindow(View v) { |
| } |
| |
| @Override |
| public void onViewDetachedFromWindow(View v) { |
| mForwarding = false; |
| mActivePointerId = MotionEvent.INVALID_POINTER_ID; |
| |
| if (mDisallowIntercept != null) { |
| mSrc.removeCallbacks(mDisallowIntercept); |
| } |
| } |
| |
| /** |
| * Called when forwarding would like to start. |
| * <p> |
| * By default, this will show the popup returned by {@link #getPopup()}. |
| * It may be overridden to perform another action, like clicking the |
| * source view or preparing the popup before showing it. |
| * |
| * @return true to start forwarding, false otherwise |
| */ |
| protected boolean onForwardingStarted() { |
| final ListPopupWindow popup = getPopup(); |
| if (popup != null && !popup.isShowing()) { |
| popup.show(); |
| } |
| return true; |
| } |
| |
| /** |
| * Called when forwarding would like to stop. |
| * <p> |
| * By default, this will dismiss the popup returned by |
| * {@link #getPopup()}. It may be overridden to perform some other |
| * action. |
| * |
| * @return true to stop forwarding, false otherwise |
| */ |
| protected boolean onForwardingStopped() { |
| final ListPopupWindow popup = getPopup(); |
| if (popup != null && popup.isShowing()) { |
| popup.dismiss(); |
| } |
| return true; |
| } |
| |
| /** |
| * Observes motion events and determines when to start forwarding. |
| * |
| * @param srcEvent motion event in source view coordinates |
| * @return true to start forwarding motion events, false otherwise |
| */ |
| private boolean onTouchObserved(MotionEvent srcEvent) { |
| final View src = mSrc; |
| if (!src.isEnabled()) { |
| return false; |
| } |
| |
| final int actionMasked = srcEvent.getActionMasked(); |
| switch (actionMasked) { |
| case MotionEvent.ACTION_DOWN: |
| mActivePointerId = srcEvent.getPointerId(0); |
| mWasLongPress = false; |
| |
| if (mDisallowIntercept == null) { |
| mDisallowIntercept = new DisallowIntercept(); |
| } |
| src.postDelayed(mDisallowIntercept, mTapTimeout); |
| |
| if (mTriggerLongPress == null) { |
| mTriggerLongPress = new TriggerLongPress(); |
| } |
| src.postDelayed(mTriggerLongPress, mLongPressTimeout); |
| break; |
| case MotionEvent.ACTION_MOVE: |
| final int activePointerIndex = srcEvent.findPointerIndex(mActivePointerId); |
| if (activePointerIndex >= 0) { |
| final float x = srcEvent.getX(activePointerIndex); |
| final float y = srcEvent.getY(activePointerIndex); |
| |
| // Has the pointer has moved outside of the view? |
| if (!src.pointInView(x, y, mScaledTouchSlop)) { |
| clearCallbacks(); |
| |
| // Don't let the parent intercept our events. |
| src.getParent().requestDisallowInterceptTouchEvent(true); |
| return true; |
| } |
| } |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| case MotionEvent.ACTION_UP: |
| clearCallbacks(); |
| break; |
| } |
| |
| return false; |
| } |
| |
| private void clearCallbacks() { |
| if (mTriggerLongPress != null) { |
| mSrc.removeCallbacks(mTriggerLongPress); |
| } |
| |
| if (mDisallowIntercept != null) { |
| mSrc.removeCallbacks(mDisallowIntercept); |
| } |
| } |
| |
| private void onLongPress() { |
| clearCallbacks(); |
| |
| final View src = mSrc; |
| if (!src.isEnabled() || src.isLongClickable()) { |
| // Ignore long-press if the view is disabled or has its own |
| // handler. |
| return; |
| } |
| |
| if (!onForwardingStarted()) { |
| return; |
| } |
| |
| // Don't let the parent intercept our events. |
| src.getParent().requestDisallowInterceptTouchEvent(true); |
| |
| // Make sure we cancel any ongoing source event stream. |
| final long now = SystemClock.uptimeMillis(); |
| final MotionEvent e = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, 0, 0, 0); |
| src.onTouchEvent(e); |
| e.recycle(); |
| |
| mForwarding = true; |
| mWasLongPress = true; |
| } |
| |
| /** |
| * Handled forwarded motion events and determines when to stop |
| * forwarding. |
| * |
| * @param srcEvent motion event in source view coordinates |
| * @return true to continue forwarding motion events, false to cancel |
| */ |
| private boolean onTouchForwarded(MotionEvent srcEvent) { |
| final View src = mSrc; |
| final ListPopupWindow popup = getPopup(); |
| if (popup == null || !popup.isShowing()) { |
| return false; |
| } |
| |
| final DropDownListView dst = popup.mDropDownList; |
| if (dst == null || !dst.isShown()) { |
| return false; |
| } |
| |
| // Convert event to destination-local coordinates. |
| final MotionEvent dstEvent = MotionEvent.obtainNoHistory(srcEvent); |
| src.toGlobalMotionEvent(dstEvent); |
| dst.toLocalMotionEvent(dstEvent); |
| |
| // Forward converted event to destination view, then recycle it. |
| final boolean handled = dst.onForwardedEvent(dstEvent, mActivePointerId); |
| dstEvent.recycle(); |
| |
| // Always cancel forwarding when the touch stream ends. |
| final int action = srcEvent.getActionMasked(); |
| final boolean keepForwarding = action != MotionEvent.ACTION_UP |
| && action != MotionEvent.ACTION_CANCEL; |
| |
| return handled && keepForwarding; |
| } |
| |
| private class DisallowIntercept implements Runnable { |
| @Override |
| public void run() { |
| final ViewParent parent = mSrc.getParent(); |
| parent.requestDisallowInterceptTouchEvent(true); |
| } |
| } |
| |
| private class TriggerLongPress implements Runnable { |
| @Override |
| public void run() { |
| onLongPress(); |
| } |
| } |
| } |
| |
| /** |
| * <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 { |
| /** Duration in milliseconds of the drag-to-open click animation. */ |
| private static final long CLICK_ANIM_DURATION = 150; |
| |
| /** Target alpha value for drag-to-open click animation. */ |
| private static final int CLICK_ANIM_ALPHA = 0x80; |
| |
| /** Wrapper around Drawable's <code>alpha</code> property. */ |
| private static final IntProperty<Drawable> DRAWABLE_ALPHA = |
| new IntProperty<Drawable>("alpha") { |
| @Override |
| public void setValue(Drawable object, int value) { |
| object.setAlpha(value); |
| } |
| |
| @Override |
| public Integer get(Drawable object) { |
| return object.getAlpha(); |
| } |
| }; |
| |
| /* |
| * 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 boolean mHijackFocus; |
| |
| /** Whether to force drawing of the pressed state selector. */ |
| private boolean mDrawsInPressedState; |
| |
| /** Current drag-to-open click animation, if any. */ |
| private Animator mClickAnimation; |
| |
| /** Helper for drag-to-open auto scrolling. */ |
| private AbsListViewAutoScroller mScrollHelper; |
| |
| /** |
| * <p>Creates a new list view wrapper.</p> |
| * |
| * @param context this view's context |
| */ |
| public DropDownListView(Context context, boolean hijackFocus) { |
| super(context, null, com.android.internal.R.attr.dropDownListViewStyle); |
| mHijackFocus = hijackFocus; |
| // TODO: Add an API to control this |
| setCacheColorHint(0); // Transparent, since the background drawable could be anything. |
| } |
| |
| /** |
| * Handles forwarded events. |
| * |
| * @param activePointerId id of the pointer that activated forwarding |
| * @return whether the event was handled |
| */ |
| public boolean onForwardedEvent(MotionEvent event, int activePointerId) { |
| boolean handledEvent = true; |
| boolean clearPressedItem = false; |
| |
| final int actionMasked = event.getActionMasked(); |
| switch (actionMasked) { |
| case MotionEvent.ACTION_CANCEL: |
| handledEvent = false; |
| break; |
| case MotionEvent.ACTION_UP: |
| handledEvent = false; |
| // $FALL-THROUGH$ |
| case MotionEvent.ACTION_MOVE: |
| final int activeIndex = event.findPointerIndex(activePointerId); |
| if (activeIndex < 0) { |
| handledEvent = false; |
| break; |
| } |
| |
| final int x = (int) event.getX(activeIndex); |
| final int y = (int) event.getY(activeIndex); |
| final int position = pointToPosition(x, y); |
| if (position == INVALID_POSITION) { |
| clearPressedItem = true; |
| break; |
| } |
| |
| final View child = getChildAt(position - getFirstVisiblePosition()); |
| setPressedItem(child, position, x, y); |
| handledEvent = true; |
| |
| if (actionMasked == MotionEvent.ACTION_UP) { |
| clickPressedItem(child, position); |
| } |
| break; |
| } |
| |
| // Failure to handle the event cancels forwarding. |
| if (!handledEvent || clearPressedItem) { |
| clearPressedItem(); |
| } |
| |
| // Manage automatic scrolling. |
| if (handledEvent) { |
| if (mScrollHelper == null) { |
| mScrollHelper = new AbsListViewAutoScroller(this); |
| } |
| mScrollHelper.setEnabled(true); |
| mScrollHelper.onTouch(this, event); |
| } else if (mScrollHelper != null) { |
| mScrollHelper.setEnabled(false); |
| } |
| |
| return handledEvent; |
| } |
| |
| /** |
| * Starts an alpha animation on the selector. When the animation ends, |
| * the list performs a click on the item. |
| */ |
| private void clickPressedItem(final View child, final int position) { |
| final long id = getItemIdAtPosition(position); |
| final Animator anim = ObjectAnimator.ofInt( |
| mSelector, DRAWABLE_ALPHA, 0xFF, CLICK_ANIM_ALPHA, 0xFF); |
| anim.setDuration(CLICK_ANIM_DURATION); |
| anim.setInterpolator(new AccelerateDecelerateInterpolator()); |
| anim.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| performItemClick(child, position, id); |
| } |
| }); |
| anim.start(); |
| |
| if (mClickAnimation != null) { |
| mClickAnimation.cancel(); |
| } |
| mClickAnimation = anim; |
| } |
| |
| private void clearPressedItem() { |
| mDrawsInPressedState = false; |
| setPressed(false); |
| updateSelectorState(); |
| |
| final View motionView = getChildAt(mMotionPosition - mFirstPosition); |
| if (motionView != null) { |
| motionView.setPressed(false); |
| } |
| |
| if (mClickAnimation != null) { |
| mClickAnimation.cancel(); |
| mClickAnimation = null; |
| } |
| } |
| |
| private void setPressedItem(View child, int position, float x, float y) { |
| mDrawsInPressedState = true; |
| |
| // Ordering is essential. First, update the container's pressed state. |
| drawableHotspotChanged(x, y); |
| if (!isPressed()) { |
| setPressed(true); |
| } |
| |
| // Next, run layout if we need to stabilize child positions. |
| if (mDataChanged) { |
| layoutChildren(); |
| } |
| |
| // Manage the pressed view based on motion position. This allows us to |
| // play nicely with actual touch and scroll events. |
| final View motionView = getChildAt(mMotionPosition - mFirstPosition); |
| if (motionView != null && motionView != child && motionView.isPressed()) { |
| motionView.setPressed(false); |
| } |
| mMotionPosition = position; |
| |
| // Offset for child coordinates. |
| final float childX = x - child.getLeft(); |
| final float childY = y - child.getTop(); |
| child.drawableHotspotChanged(childX, childY); |
| if (!child.isPressed()) { |
| child.setPressed(true); |
| } |
| |
| // Ensure that keyboard focus starts from the last touched position. |
| setSelectedPositionInt(position); |
| positionSelectorLikeTouch(position, child, x, y); |
| |
| // Refresh the drawable state to reflect the new pressed state, |
| // which will also update the selector state. |
| refreshDrawableState(); |
| |
| if (mClickAnimation != null) { |
| mClickAnimation.cancel(); |
| mClickAnimation = null; |
| } |
| } |
| |
| @Override |
| boolean touchModeDrawsInPressedState() { |
| return mDrawsInPressedState || super.touchModeDrawsInPressedState(); |
| } |
| |
| /** |
| * <p>Avoids jarring scrolling effect by ensuring that list elements |
| * made of a text view fit on a single line.</p> |
| * |
| * @param position the item index in the list to get a view for |
| * @return the view for the specified item |
| */ |
| @Override |
| View obtainView(int position, boolean[] isScrap) { |
| View view = super.obtainView(position, isScrap); |
| |
| if (view instanceof TextView) { |
| ((TextView) view).setHorizontallyScrolling(true); |
| } |
| |
| return view; |
| } |
| |
| @Override |
| public boolean isInTouchMode() { |
| // WARNING: Please read the comment where mListSelectionHidden is declared |
| return (mHijackFocus && mListSelectionHidden) || super.isInTouchMode(); |
| } |
| |
| /** |
| * <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(); |
| } |
| |
| /** |
| * <p>Returns the focus state in the drop down.</p> |
| * |
| * @return true always if hijacking focus |
| */ |
| @Override |
| public boolean hasFocus() { |
| return mHijackFocus || super.hasFocus(); |
| } |
| } |
| |
| 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 ListSelectorHider implements Runnable { |
| public void run() { |
| clearListSelection(); |
| } |
| } |
| |
| private class ResizePopupRunnable implements Runnable { |
| public void run() { |
| if (mDropDownList != null && mDropDownList.isAttachedToWindow() |
| && mDropDownList.getCount() > mDropDownList.getChildCount() |
| && mDropDownList.getChildCount() <= mListItemExpandMaximum) { |
| mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); |
| show(); |
| } |
| } |
| } |
| |
| private class PopupTouchInterceptor implements OnTouchListener { |
| public boolean onTouch(View v, 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 PopupScrollListener implements ListView.OnScrollListener { |
| public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, |
| int totalItemCount) { |
| |
| } |
| |
| public void onScrollStateChanged(AbsListView view, int scrollState) { |
| if (scrollState == SCROLL_STATE_TOUCH_SCROLL && |
| !isInputMethodNotNeeded() && mPopup.getContentView() != null) { |
| mHandler.removeCallbacks(mResizePopupRunnable); |
| mResizePopupRunnable.run(); |
| } |
| } |
| } |
| } |
