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| author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 | 
|---|---|---|
| committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 | 
| commit | d83a98f4ce9cfa908f5c54bbd70f03eec07e7553 (patch) | |
| tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /core/java/android/widget/AutoCompleteTextView.java | |
| parent | 076357b8567458d4b6dfdcf839ef751634cd2bfb (diff) | |
| download | frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.zip frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.gz frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.bz2 | |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'core/java/android/widget/AutoCompleteTextView.java')
| -rw-r--r-- | core/java/android/widget/AutoCompleteTextView.java | 1071 | 
1 files changed, 0 insertions, 1071 deletions
| diff --git a/core/java/android/widget/AutoCompleteTextView.java b/core/java/android/widget/AutoCompleteTextView.java deleted file mode 100644 index 7a51676..0000000 --- a/core/java/android/widget/AutoCompleteTextView.java +++ /dev/null @@ -1,1071 +0,0 @@ -/* - * Copyright (C) 2007 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.content.Context; -import android.content.res.TypedArray; -import android.graphics.Rect; -import android.graphics.drawable.Drawable; -import android.text.Editable; -import android.text.Selection; -import android.text.TextUtils; -import android.text.TextWatcher; -import android.util.AttributeSet; -import android.util.Log; -import android.view.KeyEvent; -import android.view.LayoutInflater; -import android.view.MotionEvent; -import android.view.View; -import android.view.ViewGroup; -import android.view.inputmethod.CompletionInfo; -import android.view.inputmethod.InputMethodManager; -import android.view.inputmethod.EditorInfo; - -import com.android.internal.R; - - -/** - * <p>An editable text view that shows completion suggestions automatically - * while the user is typing. The list of suggestions is displayed in a drop - * down menu from which the user can choose an item to replace the content - * of the edit box with.</p> - * - * <p>The drop down can be dismissed at any time by pressing the back key or, - * if no item is selected in the drop down, by pressing the enter/dpad center - * key.</p> - * - * <p>The list of suggestions is obtained from a data adapter and appears - * only after a given number of characters defined by - * {@link #getThreshold() the threshold}.</p> - * - * <p>The following code snippet shows how to create a text view which suggests - * various countries names while the user is typing:</p> - * - * <pre class="prettyprint"> - * public class CountriesActivity extends Activity { - *     protected void onCreate(Bundle icicle) { - *         super.onCreate(icicle); - *         setContentView(R.layout.countries); - * - *         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, - *                 android.R.layout.simple_dropdown_item_1line, COUNTRIES); - *         AutoCompleteTextView textView = (AutoCompleteTextView) - *                 findViewById(R.id.countries_list); - *         textView.setAdapter(adapter); - *     } - * - *     private static final String[] COUNTRIES = new String[] { - *         "Belgium", "France", "Italy", "Germany", "Spain" - *     }; - * } - * </pre> - * - * @attr ref android.R.styleable#AutoCompleteTextView_completionHint - * @attr ref android.R.styleable#AutoCompleteTextView_completionThreshold - * @attr ref android.R.styleable#AutoCompleteTextView_completionHintView - * @attr ref android.R.styleable#AutoCompleteTextView_dropDownSelector - */ -public class AutoCompleteTextView extends EditText implements Filter.FilterListener { -    static final boolean DEBUG = false; -    static final String TAG = "AutoCompleteTextView"; - -    private static final int HINT_VIEW_ID = 0x17; - -    private CharSequence mHintText; -    private int mHintResource; - -    private ListAdapter mAdapter; -    private Filter mFilter; -    private int mThreshold; - -    private PopupWindow mPopup; -    private DropDownListView mDropDownList; -    private int mDropDownVerticalOffset; -    private int mDropDownHorizontalOffset; - -    private Drawable mDropDownListHighlight; - -    private AdapterView.OnItemClickListener mItemClickListener; -    private AdapterView.OnItemSelectedListener mItemSelectedListener; - -    private final DropDownItemClickListener mDropDownItemClickListener = -            new DropDownItemClickListener(); - -    private int mLastKeyCode = KeyEvent.KEYCODE_UNKNOWN; -    private boolean mOpenBefore; - -    private Validator mValidator = null; - -    private boolean mBlockCompletion; - -    private AutoCompleteTextView.ListSelectorHider mHideSelector; - -    // Indicates whether this AutoCompleteTextView is attached to a window or not -    // The widget is attached to a window when mAttachCount > 0 -    private int mAttachCount; - -    public AutoCompleteTextView(Context context) { -        this(context, null); -    } - -    public AutoCompleteTextView(Context context, AttributeSet attrs) { -        this(context, attrs, com.android.internal.R.attr.autoCompleteTextViewStyle); -    } - -    public AutoCompleteTextView(Context context, AttributeSet attrs, int defStyle) { -        super(context, attrs, defStyle); - -        mPopup = new PopupWindow(context, attrs, -                com.android.internal.R.attr.autoCompleteTextViewStyle); - -        TypedArray a = -            context.obtainStyledAttributes( -                attrs, com.android.internal.R.styleable.AutoCompleteTextView, defStyle, 0); - -        mThreshold = a.getInt( -                R.styleable.AutoCompleteTextView_completionThreshold, 2); - -        mHintText = a.getText(R.styleable.AutoCompleteTextView_completionHint); - -        mDropDownListHighlight = a.getDrawable( -                R.styleable.AutoCompleteTextView_dropDownSelector); -        mDropDownVerticalOffset = (int) -                a.getDimension(R.styleable.AutoCompleteTextView_dropDownVerticalOffset, 0.0f); -        mDropDownHorizontalOffset = (int) -                a.getDimension(R.styleable.AutoCompleteTextView_dropDownHorizontalOffset, 0.0f); - -        mHintResource = a.getResourceId(R.styleable.AutoCompleteTextView_completionHintView, -                R.layout.simple_dropdown_hint); - -        // Always turn on the auto complete input type flag, since it -        // makes no sense to use this widget without it. -        int inputType = getInputType(); -        if ((inputType&EditorInfo.TYPE_MASK_CLASS) -                == EditorInfo.TYPE_CLASS_TEXT) { -            inputType |= EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE; -            setRawInputType(inputType); -        } - -        a.recycle(); - -        setFocusable(true); - -        addTextChangedListener(new MyWatcher()); -    } - -    /** -     * Sets this to be single line; a separate method so -     * MultiAutoCompleteTextView can skip this. -     */ -    /* package */ void finishInit() { -        setSingleLine(); -    } - -    /** -     * <p>Sets the optional hint text that is displayed at the bottom of the -     * the matching list.  This can be used as a cue to the user on how to -     * best use the list, or to provide extra information.</p> -     * -     * @param hint the text to be displayed to the user -     * -     * @attr ref android.R.styleable#AutoCompleteTextView_completionHint -     */ -    public void setCompletionHint(CharSequence hint) { -        mHintText = hint; -    } - -    /** -     * <p>Returns the number of characters the user must type before the drop -     * down list is shown.</p> -     * -     * @return the minimum number of characters to type to show the drop down -     * -     * @see #setThreshold(int) -     */ -    public int getThreshold() { -        return mThreshold; -    } - -    /** -     * <p>Specifies the minimum number of characters the user has to type in the -     * edit box before the drop down list is shown.</p> -     * -     * <p>When <code>threshold</code> is less than or equals 0, a threshold of -     * 1 is applied.</p> -     * -     * @param threshold the number of characters to type before the drop down -     *                  is shown -     * -     * @see #getThreshold() -     * -     * @attr ref android.R.styleable#AutoCompleteTextView_completionThreshold -     */ -    public void setThreshold(int threshold) { -        if (threshold <= 0) { -            threshold = 1; -        } - -        mThreshold = threshold; -    } - -    /** -     * <p>Sets the listener that will be notified when the user clicks an item -     * in the drop down list.</p> -     * -     * @param l the item click listener -     */ -    public void setOnItemClickListener(AdapterView.OnItemClickListener l) { -        mItemClickListener = l; -    } - -    /** -     * <p>Sets the listener that will be notified when the user selects an item -     * in the drop down list.</p> -     * -     * @param l the item selected listener -     */ -    public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener l) { -        mItemSelectedListener = l; -    } - -    /** -     * <p>Returns the listener that is notified whenever the user clicks an item -     * in the drop down list.</p> -     * -     * @return the item click listener -     * -     * @deprecated Use {@link #getOnItemClickListener()} intead -     */ -    @Deprecated -    public AdapterView.OnItemClickListener getItemClickListener() { -        return mItemClickListener; -    } - -    /** -     * <p>Returns the listener that is notified whenever the user selects an -     * item in the drop down list.</p> -     * -     * @return the item selected listener -     * -     * @deprecated Use {@link #getOnItemSelectedListener()} intead -     */ -    @Deprecated -    public AdapterView.OnItemSelectedListener getItemSelectedListener() { -        return mItemSelectedListener; -    } - -    /** -     * <p>Returns the listener that is notified whenever the user clicks an item -     * in the drop down list.</p> -     * -     * @return the item click listener -     */ -    public AdapterView.OnItemClickListener getOnItemClickListener() { -        return mItemClickListener; -    } - -    /** -     * <p>Returns the listener that is notified whenever the user selects an -     * item in the drop down list.</p> -     * -     * @return the item selected listener -     */ -    public AdapterView.OnItemSelectedListener getOnItemSelectedListener() { -        return mItemSelectedListener; -    } - -    /** -     * <p>Returns a filterable list adapter used for auto completion.</p> -     * -     * @return a data adapter used for auto completion -     */ -    public ListAdapter getAdapter() { -        return mAdapter; -    } - -    /** -     * <p>Changes the list of data used for auto completion. The provided list -     * must be a filterable list adapter.</p> -     *  -     * <p>The caller is still responsible for managing any resources used by the adapter. -     * Notably, when the AutoCompleteTextView is closed or released, the adapter is not notified. -     * A common case is the use of {@link android.widget.CursorAdapter}, which -     * contains a {@link android.database.Cursor} that must be closed.  This can be done -     * automatically (see  -     * {@link android.app.Activity#startManagingCursor(android.database.Cursor)  -     * startManagingCursor()}), -     * or by manually closing the cursor when the AutoCompleteTextView is dismissed.</p> -     * -     * @param adapter the adapter holding the auto completion data -     * -     * @see #getAdapter() -     * @see android.widget.Filterable -     * @see android.widget.ListAdapter -     */ -    public <T extends ListAdapter & Filterable> void setAdapter(T adapter) { -        mAdapter = adapter; -        if (mAdapter != null) { -            //noinspection unchecked -            mFilter = ((Filterable) mAdapter).getFilter(); -        } else { -            mFilter = null; -        } - -        if (mDropDownList != null) { -            mDropDownList.setAdapter(mAdapter); -        } -    } - -    @Override -    public boolean onKeyPreIme(int keyCode, KeyEvent event) { -        if (isPopupShowing()) { -            // special case for the back key, we do not even try to send it -            // to the drop down list but instead, consume it immediately -            if (keyCode == KeyEvent.KEYCODE_BACK) { -                dismissDropDown(); -                return true; -            } -        } -        return super.onKeyPreIme(keyCode, event); -    } - -    @Override -    public boolean onKeyUp(int keyCode, KeyEvent event) { -        if (isPopupShowing() && mDropDownList.getSelectedItemPosition() >= 0) { -            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: -                        performCompletion(); -                        return true; -                } -            } -        } -        return super.onKeyUp(keyCode, event); -    } - -    @Override -    public boolean onKeyDown(int keyCode, KeyEvent event) { -        // when the drop down is shown, we drive it directly -        if (isPopupShowing()) { -            // 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))) { -                int curIndex = mDropDownList.getSelectedItemPosition(); -                boolean consumed; -                final boolean below = !mPopup.isAboveAnchor(); -                if ((below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex <= 0) || -                        (!below && keyCode == KeyEvent.KEYCODE_DPAD_DOWN && curIndex >= -                        mDropDownList.getAdapter().getCount() - 1)) { -                    // When the selection is at the top, we block the key -                    // event to prevent focus from moving. -                    mDropDownList.hideSelector(); -                    mDropDownList.requestLayout(); -                    mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); -                    mPopup.update(); -                    return true; -                } -                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(); -                    if (false) { -                        // Update whether the pop-up is in front of or behind -                        // the input method, depending on whether the user has -                        // moved down in it. -                        mPopup.setInputMethodMode(curIndex > 0 -                                ? PopupWindow.INPUT_METHOD_NOT_NEEDED -                                : PopupWindow.INPUT_METHOD_NEEDED); -                    } -                    mPopup.update(); - -                    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 -                        Adapter adapter = mDropDownList.getAdapter(); -                        if (adapter != null && curIndex == adapter.getCount() - 1) { -                            return true; -                        } -                    } else if (!below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex == 0) { -                        return true; -                    } -                } -            } -        } else { -            switch(keyCode) { -            case KeyEvent.KEYCODE_DPAD_DOWN: -                performValidation(); -            } -        } - -        mLastKeyCode = keyCode; -        boolean handled = super.onKeyDown(keyCode, event); -        mLastKeyCode = KeyEvent.KEYCODE_UNKNOWN; - -        return handled; -    } - -    /** -     * Returns <code>true</code> if the amount of text in the field meets -     * or exceeds the {@link #getThreshold} requirement.  You can override -     * this to impose a different standard for when filtering will be -     * triggered. -     */ -    public boolean enoughToFilter() { -        if (DEBUG) Log.v(TAG, "Enough to filter: len=" + getText().length() -                + " threshold=" + mThreshold); -        return getText().length() >= mThreshold; -    } - -    /** -     * This is used to watch for edits to the text view.  Note that we call -     * to methods on the auto complete text view class so that we can access -     * private vars without going through thunks. -     */ -    private class MyWatcher implements TextWatcher { -        public void afterTextChanged(Editable s) { -            doAfterTextChanged(); -        } -        public void beforeTextChanged(CharSequence s, int start, int count, int after) { -            doBeforeTextChanged(); -        } -        public void onTextChanged(CharSequence s, int start, int before, int count) { -        } -    } - -    void doBeforeTextChanged() { -        if (mBlockCompletion) return; - -        // when text is changed, inserted or deleted, we attempt to show -        // the drop down -        mOpenBefore = isPopupShowing(); -        if (DEBUG) Log.v(TAG, "before text changed: open=" + mOpenBefore); -    } - -    void doAfterTextChanged() { -        if (mBlockCompletion) return; - -        // if the list was open before the keystroke, but closed afterwards, -        // then something in the keystroke processing (an input filter perhaps) -        // called performCompletion() and we shouldn't do any more processing. -        if (DEBUG) Log.v(TAG, "after text changed: openBefore=" + mOpenBefore -                + " open=" + isPopupShowing()); -        if (mOpenBefore && !isPopupShowing()) { -            return; -        } - -        // the drop down is shown only when a minimum number of characters -        // was typed in the text view -        if (enoughToFilter()) { -            if (mFilter != null) { -                performFiltering(getText(), mLastKeyCode); -            } -        } else { -            // drop down is automatically dismissed when enough characters -            // are deleted from the text view -            dismissDropDown(); -            if (mFilter != null) { -                mFilter.filter(null); -            } -        } -    } - -    /** -     * <p>Indicates whether the popup menu is showing.</p> -     * -     * @return true if the popup menu is showing, false otherwise -     */ -    public boolean isPopupShowing() { -        return mPopup.isShowing(); -    } - -    /** -     * <p>Converts the selected item from the drop down list into a sequence -     * of character that can be used in the edit box.</p> -     * -     * @param selectedItem the item selected by the user for completion -     * -     * @return a sequence of characters representing the selected suggestion -     */ -    protected CharSequence convertSelectionToString(Object selectedItem) { -        return mFilter.convertResultToString(selectedItem); -    } -     -    /** -     * <p>Clear the list selection.  This may only be temporary, as user input will often bring  -     * it back. -     */ -    public void clearListSelection() { -        if (mDropDownList != null) { -            mDropDownList.hideSelector(); -            mDropDownList.requestLayout(); -        } -    } -     -    /** -     * Set the position of the dropdown view selection. -     *  -     * @param position The position to move the selector to. -     */ -    public void setListSelection(int position) { -        if (mPopup.isShowing() && (mDropDownList != null)) { -            mDropDownList.setSelection(position); -            // ListView.setSelection() will call requestLayout() -        } -    } - -    /** -     * Get the position of the dropdown view selection, if there is one.  Returns  -     * {@link ListView#INVALID_POSITION ListView.INVALID_POSITION} if there is no dropdown or if -     * there is no selection. -     *  -     * @return the position of the current selection, if there is one, or  -     * {@link ListView#INVALID_POSITION ListView.INVALID_POSITION} if not. -     *  -     * @see ListView#getSelectedItemPosition() -     */ -    public int getListSelection() { -        if (mPopup.isShowing() && (mDropDownList != null)) { -            return mDropDownList.getSelectedItemPosition(); -        } -        return ListView.INVALID_POSITION; -    } -     -    /** -     * <p>Starts filtering the content of the drop down list. The filtering -     * pattern is the content of the edit box. Subclasses should override this -     * method to filter with a different pattern, for instance a substring of -     * <code>text</code>.</p> -     * -     * @param text the filtering pattern -     * @param keyCode the last character inserted in the edit box; beware that -     * this will be null when text is being added through a soft input method. -     */ -    @SuppressWarnings({ "UnusedDeclaration" }) -    protected void performFiltering(CharSequence text, int keyCode) { -        mFilter.filter(text, this); -    } - -    /** -     * <p>Performs the text completion by converting the selected item from -     * the drop down list into a string, replacing the text box's content with -     * this string and finally dismissing the drop down menu.</p> -     */ -    public void performCompletion() { -        performCompletion(null, -1, -1); -    } - -    @Override -    public void onCommitCompletion(CompletionInfo completion) { -        if (isPopupShowing()) { -            mBlockCompletion = true; -            replaceText(completion.getText()); -            mBlockCompletion = false; - -            if (mItemClickListener != null) { -                final DropDownListView list = mDropDownList; -                // Note that we don't have a View here, so we will need to -                // supply null.  Hopefully no existing apps crash... -                mItemClickListener.onItemClick(list, null, completion.getPosition(), -                        completion.getId()); -            } -        } -    } - -    private void performCompletion(View selectedView, int position, long id) { -        if (isPopupShowing()) { -            Object selectedItem; -            if (position < 0) { -                selectedItem = mDropDownList.getSelectedItem(); -            } else { -                selectedItem = mAdapter.getItem(position); -            } -            if (selectedItem == null) { -                Log.w(TAG, "performCompletion: no selected item"); -                return; -            } - -            mBlockCompletion = true; -            replaceText(convertSelectionToString(selectedItem)); -            mBlockCompletion = false;             - -            if (mItemClickListener != null) { -                final DropDownListView list = mDropDownList; - -                if (selectedView == null || position < 0) { -                    selectedView = list.getSelectedView(); -                    position = list.getSelectedItemPosition(); -                    id = list.getSelectedItemId(); -                } -                mItemClickListener.onItemClick(list, selectedView, position, id); -            } -        } - -        dismissDropDown(); -    } -     -    /** -     * Identifies whether the view is currently performing a text completion, so subclasses -     * can decide whether to respond to text changed events. -     */ -    public boolean isPerformingCompletion() { -        return mBlockCompletion; -    } - -    /** -     * <p>Performs the text completion by replacing the current text by the -     * selected item. Subclasses should override this method to avoid replacing -     * the whole content of the edit box.</p> -     * -     * @param text the selected suggestion in the drop down list -     */ -    protected void replaceText(CharSequence text) { -        setText(text); -        // make sure we keep the caret at the end of the text view -        Editable spannable = getText(); -        Selection.setSelection(spannable, spannable.length()); -    } - -    public void onFilterComplete(int count) { -        if (mAttachCount <= 0) return; - -        /* -         * This checks enoughToFilter() again because filtering requests -         * are asynchronous, so the result may come back after enough text -         * has since been deleted to make it no longer appropriate -         * to filter. -         */ - -        if (count > 0 && enoughToFilter()) { -            if (hasFocus() && hasWindowFocus()) { -                showDropDown(); -            } -        } else { -            dismissDropDown(); -        } -    } - -    @Override -    public void onWindowFocusChanged(boolean hasWindowFocus) { -        super.onWindowFocusChanged(hasWindowFocus); -        performValidation(); -        if (!hasWindowFocus) { -            dismissDropDown(); -        } -    } - -    @Override -    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { -        super.onFocusChanged(focused, direction, previouslyFocusedRect); -        performValidation(); -        if (!focused) { -            dismissDropDown(); -        } -    } - -    @Override -    protected void onAttachedToWindow() { -        super.onAttachedToWindow(); -        mAttachCount++; -    } - -    @Override -    protected void onDetachedFromWindow() { -        dismissDropDown(); -        mAttachCount--; -        super.onDetachedFromWindow(); -    } - -    /** -     * <p>Closes the drop down if present on screen.</p> -     */ -    public void dismissDropDown() { -        InputMethodManager imm = InputMethodManager.peekInstance(); -        if (imm != null) { -            imm.displayCompletions(this, null); -        } -        mPopup.dismiss(); -        mPopup.setContentView(null); -        mDropDownList = null; -    } - -    @Override -    protected boolean setFrame(int l, int t, int r, int b) { -        boolean result = super.setFrame(l, t, r, b); - -        if (mPopup.isShowing()) { -            mPopup.update(this, r - l, -1); -        } - -        return result; -    } - -    /** -     * <p>Displays the drop down on screen.</p> -     */ -    public void showDropDown() { -        int height = buildDropDown(); -        if (mPopup.isShowing()) { -            mPopup.update(this, mDropDownHorizontalOffset, mDropDownVerticalOffset, -                    getWidth(), height); -        } else { -            mPopup.setWindowLayoutMode(0, ViewGroup.LayoutParams.WRAP_CONTENT); -            mPopup.setWidth(getWidth()); -            mPopup.setHeight(height); -            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); -            mPopup.setOutsideTouchable(true); -            mPopup.setTouchInterceptor(new PopupTouchIntercepter()); -            mPopup.showAsDropDown(this, mDropDownHorizontalOffset, mDropDownVerticalOffset); -            mDropDownList.setSelection(ListView.INVALID_POSITION); -            mDropDownList.hideSelector(); -            mDropDownList.requestFocus(); -            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 (mAdapter != null) { -            InputMethodManager imm = InputMethodManager.peekInstance(); -            if (imm != null) { -                int N = mAdapter.getCount(); -                if (N > 20) N = 20; -                CompletionInfo[] completions = new CompletionInfo[N]; -                for (int i = 0; i < N; i++) { -                    Object item = mAdapter.getItem(i); -                    long id = mAdapter.getItemId(i); -                    completions[i] = new CompletionInfo(id, i, -                            convertSelectionToString(item)); -                } -                imm.displayCompletions(this, completions); -            } -        } - -        if (mDropDownList == null) { -            Context context = getContext(); - -            mHideSelector = new ListSelectorHider(); - -            mDropDownList = new DropDownListView(context); -            mDropDownList.setSelector(mDropDownListHighlight); -            mDropDownList.setAdapter(mAdapter); -            mDropDownList.setVerticalFadingEdgeEnabled(true); -            mDropDownList.setOnItemClickListener(mDropDownItemClickListener); -            mDropDownList.setFocusable(true); -            mDropDownList.setFocusableInTouchMode(true); - -            if (mItemSelectedListener != null) { -                mDropDownList.setOnItemSelectedListener(mItemSelectedListener); -            } - -            dropDownView = mDropDownList; - -            View hintView = getHintView(context); -            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 -                LinearLayout hintContainer = new LinearLayout(context); -                hintContainer.setOrientation(LinearLayout.VERTICAL); - -                LinearLayout.LayoutParams hintParams = new LinearLayout.LayoutParams( -                        ViewGroup.LayoutParams.FILL_PARENT, 0, 1.0f -                ); -                hintContainer.addView(dropDownView, hintParams); -                hintContainer.addView(hintView); - -                // 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(getWidth(), 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 = dropDownView.findViewById(HINT_VIEW_ID); -            if (view != null) { -                LinearLayout.LayoutParams hintParams = -                        (LinearLayout.LayoutParams) view.getLayoutParams(); -                otherHeights = view.getMeasuredHeight() + hintParams.topMargin -                        + hintParams.bottomMargin; -            } -        } - -        // Max height available on the screen for a popup anchored to us -        final int maxHeight = mPopup.getMaxAvailableHeight(this, mDropDownVerticalOffset); -        //otherHeights += dropDownView.getPaddingTop() + dropDownView.getPaddingBottom(); - -        return mDropDownList.measureHeightOfChildren(MeasureSpec.UNSPECIFIED, -                0, ListView.NO_POSITION, maxHeight - otherHeights, 2) + otherHeights; -    } - -    private View getHintView(Context context) { -        if (mHintText != null && mHintText.length() > 0) { -            final TextView hintView = (TextView) LayoutInflater.from(context).inflate( -                    mHintResource, null).findViewById(com.android.internal.R.id.text1); -            hintView.setText(mHintText); -            hintView.setId(HINT_VIEW_ID); -            return hintView; -        } else { -            return null; -        } -    } - -    /** -     * Sets the validator used to perform text validation. -     * -     * @param validator The validator used to validate the text entered in this widget. -     * -     * @see #getValidator() -     * @see #performValidation() -     */ -    public void setValidator(Validator validator) { -        mValidator = validator; -    } - -    /** -     * Returns the Validator set with {@link #setValidator}, -     * or <code>null</code> if it was not set. -     * -     * @see #setValidator(android.widget.AutoCompleteTextView.Validator) -     * @see #performValidation() -     */ -    public Validator getValidator() { -        return mValidator; -    } - -    /** -     * If a validator was set on this view and the current string is not valid, -     * ask the validator to fix it. -     * -     * @see #getValidator() -     * @see #setValidator(android.widget.AutoCompleteTextView.Validator) -     */ -    public void performValidation() { -        if (mValidator == null) return; - -        CharSequence text = getText(); - -        if (!TextUtils.isEmpty(text) && !mValidator.isValid(text)) { -            setText(mValidator.fixText(text)); -        } -    } - -    /** -     * Returns the Filter obtained from {@link Filterable#getFilter}, -     * or <code>null</code> if {@link #setAdapter} was not called with -     * a Filterable. -     */ -    protected Filter getFilter() { -        return mFilter; -    } - -    private class ListSelectorHider implements Runnable { -        public void run() { -            if (mDropDownList != null) { -                mDropDownList.hideSelector(); -                mDropDownList.requestLayout(); -            } -        } -    } - -    private class PopupTouchIntercepter implements OnTouchListener { -        public boolean onTouch(View v, MotionEvent event) { -            if (event.getAction() == MotionEvent.ACTION_DOWN) { -                mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); -                mPopup.update(); -            } -            return false; -        } -    } -     -    private class DropDownItemClickListener implements AdapterView.OnItemClickListener { -        public void onItemClick(AdapterView parent, View v, int position, long id) { -            performCompletion(v, position, id); -        } -    } - -    /** -     * <p>Wrapper class for a ListView. This wrapper hijacks 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; the list only looks focused.</p> -     */ -    private static class DropDownListView extends ListView { -        /** -         * <p>Creates a new list view wrapper.</p> -         * -         * @param context this view's context -         */ -        public DropDownListView(Context context) { -            super(context, null, com.android.internal.R.attr.dropDownListViewStyle); -        } - -        /** -         * <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 -        protected View obtainView(int position) { -            View view = super.obtainView(position); - -            if (view instanceof TextView) { -                ((TextView) view).setHorizontallyScrolling(true); -            } - -            return view; -        } - -        /** -         * <p>Returns the top padding of the currently selected view.</p> -         * -         * @return the height of the top padding for the selection -         */ -        public int getSelectionPaddingTop() { -            return mSelectionTopPadding; -        } - -        /** -         * <p>Returns the bottom padding of the currently selected view.</p> -         * -         * @return the height of the bottom padding for the selection -         */ -        public int getSelectionPaddingBottom() { -            return mSelectionBottomPadding; -        } - -        /** -         * <p>Returns the focus state in the drop down.</p> -         * -         * @return true always -         */ -        @Override -        public boolean hasWindowFocus() { -            return true; -        } - -        /** -         * <p>Returns the focus state in the drop down.</p> -         * -         * @return true always -         */ -        @Override -        public boolean isFocused() { -            return true; -        } - -        /** -         * <p>Returns the focus state in the drop down.</p> -         * -         * @return true always -         */ -        @Override -        public boolean hasFocus() { -            return true; -        } -         -        protected int[] onCreateDrawableState(int extraSpace) { -            int[] res = super.onCreateDrawableState(extraSpace); -            if (false) { -                StringBuilder sb = new StringBuilder("Created drawable state: ["); -                for (int i=0; i<res.length; i++) { -                    if (i > 0) sb.append(", "); -                    sb.append("0x"); -                    sb.append(Integer.toHexString(res[i])); -                } -                sb.append("]"); -                Log.i(TAG, sb.toString()); -            } -            return res; -        } -    } - -    /** -     * This interface is used to make sure that the text entered in this TextView complies to -     * a certain format.  Since there is no foolproof way to prevent the user from leaving -     * this View with an incorrect value in it, all we can do is try to fix it ourselves -     * when this happens. -     */ -    public interface Validator { -        /** -         * Validates the specified text. -         * -         * @return true If the text currently in the text editor is valid. -         * -         * @see #fixText(CharSequence) -         */ -        boolean isValid(CharSequence text); - -        /** -         * Corrects the specified text to make it valid. -         * -         * @param invalidText A string that doesn't pass validation: isValid(invalidText) -         *        returns false -         * -         * @return A string based on invalidText such as invoking isValid() on it returns true. -         * -         * @see #isValid(CharSequence) -         */ -        CharSequence fixText(CharSequence invalidText); -    } -} | 
