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/*
* Copyright (C) 2006 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.text.method;
import android.text.Spannable;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.TextView;
/**
* Provides cursor positioning, scrolling and text selection functionality in a {@link TextView}.
* <p>
* The {@link TextView} delegates handling of key events, trackball motions and touches to
* the movement method for purposes of content navigation. The framework automatically
* selects an appropriate movement method based on the content of the {@link TextView}.
* </p><p>
* This interface is intended for use by the framework; it should not be implemented
* directly by applications.
* </p>
*/
public interface MovementMethod {
public void initialize(TextView widget, Spannable text);
public boolean onKeyDown(TextView widget, Spannable text, int keyCode, KeyEvent event);
public boolean onKeyUp(TextView widget, Spannable text, int keyCode, KeyEvent event);
/**
* If the key listener wants to other kinds of key events, return true,
* otherwise return false and the caller (i.e. the widget host)
* will handle the key.
*/
public boolean onKeyOther(TextView view, Spannable text, KeyEvent event);
public void onTakeFocus(TextView widget, Spannable text, int direction);
public boolean onTrackballEvent(TextView widget, Spannable text, MotionEvent event);
public boolean onTouchEvent(TextView widget, Spannable text, MotionEvent event);
public boolean onGenericMotionEvent(TextView widget, Spannable text, MotionEvent event);
/**
* Returns true if this movement method allows arbitrary selection
* of any text; false if it has no selection (like a movement method
* that only scrolls) or a constrained selection (for example
* limited to links. The "Select All" menu item is disabled
* if arbitrary selection is not allowed.
*/
public boolean canSelectArbitrarily();
}
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