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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.chrome.browser.widget; |
| 6 |
| 7 import android.content.Context; |
| 8 import android.support.v7.widget.AppCompatEditText; |
| 9 import android.util.AttributeSet; |
| 10 import android.widget.EditText; |
| 11 |
| 12 /** |
| 13 * This custom {@link EditText} does not allow the user to scroll the text verti
cally. This is |
| 14 * can be useful when the EditText is put into a layout where it is smaller than
it's normal height. |
| 15 */ |
| 16 public class VerticallyFixedEditText extends AppCompatEditText { |
| 17 |
| 18 public VerticallyFixedEditText(Context context, AttributeSet attrs) { |
| 19 super(context, attrs); |
| 20 } |
| 21 |
| 22 private boolean mBringingPointIntoView = false; |
| 23 |
| 24 @Override |
| 25 public boolean bringPointIntoView(int offset) { |
| 26 try { |
| 27 mBringingPointIntoView = true; |
| 28 return super.bringPointIntoView(offset); |
| 29 } finally { |
| 30 mBringingPointIntoView = false; |
| 31 } |
| 32 } |
| 33 |
| 34 @Override |
| 35 public void scrollTo(int x, int y) { |
| 36 // To prevent vertical scroll on touch events, only allow |
| 37 // TextView.bringPointIntoView(...) to change the vertical scroll. |
| 38 super.scrollTo(x, mBringingPointIntoView ? y : getScrollY()); |
| 39 } |
| 40 |
| 41 } |
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