QGIS API Documentation  3.13.0-Master (5a3b1ced84)
qgsfocuswatcher.cpp
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1 /***************************************************************************
2  qgsfocuswatcher.h
3  -----------------
4  Date : April 2016
5  Copyright : (C) 2016 by Nyall Dawson
6  Email : nyall dot dawson at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #include "qgsfocuswatcher.h"
17 #include <QEvent>
18 
20  : QObject( parent )
21 {
22  Q_ASSERT( parent );
23  parent->installEventFilter( this );
24 }
25 
26 bool QgsFocusWatcher::eventFilter( QObject *, QEvent *event )
27 {
28  switch ( event->type() )
29  {
30  case QEvent::FocusIn:
31  emit focusChanged( true );
32  emit focusIn();
33  break;
34  case QEvent::FocusOut:
35  emit focusChanged( false );
36  emit focusOut();
37  break;
38  default:
39  break;
40  }
41  return false;
42 }
void focusOut()
Emitted when parent object loses focus.
QgsFocusWatcher(QObject *parent)
Constructor for QgsFocusWatcher.
void focusChanged(bool focused)
Emitted when parent object&#39;s focus changes.
void focusIn()
Emitted when parent object gains focus.
bool eventFilter(QObject *obj, QEvent *event) override