line_edit_with_button.cpp
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29 
31 
32 #include <QPushButton>
33 #include <QLineEdit>
34 #include <QHBoxLayout>
35 #include <QKeyEvent>
36 #include <QApplication>
37 
38 namespace rviz
39 {
40 
42  : QLineEdit( parent )
43 {
44  button_ = new QPushButton( this );
45  button_->setText( "..." );
46  button_->setCursor( Qt::ArrowCursor );
47  button_->setDefault( false );
48  button_->setAutoDefault( false );
49  button_->setFocusPolicy( Qt::NoFocus );
50 
51  connect( button_, SIGNAL( clicked() ), this, SLOT( onButtonClick() ));
52 }
53 
54 void LineEditWithButton::resizeEvent( QResizeEvent* event )
55 {
56  // This widget does not use a QLayout object, because I want the
57  // child button to be sized and positioned a specific way. This
58  // function lays out the child button based on the new size of the
59  // LineEdit.
60 
61  int padding = 1;
62 
63  // Make sure the text area doesn't go under the button.
64  setTextMargins( padding, padding, height(), padding );
65 
66  // Call the original resize handler.
67  QLineEdit::resizeEvent( event );
68 
69  // Make the button square, matching the height of this widget minus
70  // padding, and located all the way to the right.
71  int button_width = height() - 2 * padding;
72  int button_height = button_width;
73  button_->setGeometry( width() - button_width - padding, padding,
74  button_width, button_height );
75 }
76 
78 {
79  // I couldn't find a way to directly tell the editor that I was
80  // done with it here. "Q_EMIT returnPressed()", "Q_EMIT
81  // editingFinished()" etc did nothing. So instead, here I
82  // simulate the user pressing and releasing the "Return" key,
83  // which does indeed make it act like I want: when you select a
84  // topic from the dialog and the dialog closes, the property's
85  // Setter is called and this editor closes.
86  QKeyEvent* event = new QKeyEvent( QEvent::KeyPress, Qt::Key_Return, Qt::NoModifier );
87  QApplication::postEvent( this, event );
88  event = new QKeyEvent( QEvent::KeyRelease, Qt::Key_Return, Qt::NoModifier );
89  QApplication::postEvent( this, event );
90 }
91 
92 } // end namespace rviz
virtual void resizeEvent(QResizeEvent *event)
void simulateReturnPressed()
Send key events to mimic the "return" key being pressed and released. Useful ending an edit session a...
virtual void onButtonClick()
Override this to do something when the button is clicked.
LineEditWithButton(QWidget *parent=0)


rviz
Author(s): Dave Hershberger, David Gossow, Josh Faust
autogenerated on Wed Aug 28 2019 04:01:51