/*
 * 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.graphics.Rect;
import android.view.View;

TextView uses TransformationMethods to do things like replacing the
characters of passwords with dots, or keeping the newline characters
from causing line breaks in single-line text fields.
/**
 * TextView uses TransformationMethods to do things like replacing the
 * characters of passwords with dots, or keeping the newline characters
 * from causing line breaks in single-line text fields.
 */
public interface TransformationMethod
{
    
Returns a CharSequence that is a transformation of the source text --
for example, replacing each character with a dot in a password field.
Beware that the returned text must be exactly the same length as
the source text, and that if the source text is Editable, the returned
text must mirror it dynamically instead of doing a one-time copy.
/**
     * Returns a CharSequence that is a transformation of the source text --
     * for example, replacing each character with a dot in a password field.
     * Beware that the returned text must be exactly the same length as
     * the source text, and that if the source text is Editable, the returned
     * text must mirror it dynamically instead of doing a one-time copy.
     */
    public CharSequence getTransformation(CharSequence source, View view);

    
This method is called when the TextView that uses this
TransformationMethod gains or loses focus.
/**
     * This method is called when the TextView that uses this
     * TransformationMethod gains or loses focus.
     */
    public void onFocusChanged(View view, CharSequence sourceText,
                               boolean focused, int direction,
                               Rect previouslyFocusedRect);
}