How to show text cursor in QTextEdit Widget, if the widget doesn't have focus.

poor_robert

Hello Qt friends!

I have very strange problem and I hope I will find help or useful some hints here, because I can't figure it out by myself.

I have widget which consist of text editor which is QPlainTextEdit and my own virtual keyboard. Virtual Keyboard is built from QPushButton objects. My problem is that I would like to see blinking text cursor in editor widget while i type letters using my virtual keyboard. Unfortunately cursor disappears when I click any of keyboard's buttons, because editor widget loses it's focus.

I tried to set focusProxy feature but it didn't help. I thought about painting my own cursor, but maybe there is simplier solution, which I missed??

If You have any ideas, please write.
Robert.

PS: I can't share source code with You, because it's company's property, but I will write some lines when I come back home
to explain my problem and test possible solutions.

goetz

You could try to set focus policy to "none" on your buttons:

@
button->setFocusPolicy(Qt::NoFocus);
@

poor_robert

Hello again. I had some network access problem, so I couldn't answer earlier.

Thank You Volker for Your answer, but it wasn't what I was looking for. In my project it is important to keep focus on button, because what we do is editor with on-screen (virtual) keyboard and it's on embedded device.

I have solved this problem with subclassing QTextEdit and pain QTextCursor by myself. Here's how I did it:

header:
@#include <QTextEdit>

class QPainter;
class QTimer;

class editor : public QTextEdit
{
Q_OBJECT
public:
editor( QWidget* parent = 0);
~editor();

public slots:
void slot_BlinkCursor( );

protected:
void paintEvent( QPaintEvent* pEvent );

private:
bool bIsCursorVisible;
QTimer* CursorTimer;
};@

source file:
@#include <QPainter>
#include <QTimer>
#include <QDebug>
#include "editor.h"

editor::editor( QWidget* parent )
: QTextEdit( parent )
{
bIsCursorVisible = true;
CursorTimer = new QTimer( this );
CursorTimer->setInterval( 500 );
connect( CursorTimer, SIGNAL( timeout() ), this, SLOT( slot_BlinkCursor() ));

CursorTimer->start();
}

editor::~editor()
{
//nothing
}

void editor::slot_BlinkCursor( ) {
if( bIsCursorVisible )
{
bIsCursorVisible = false;
}
else
{
bIsCursorVisible = true;
}

viewport()->update();

}

void editor::paintEvent( QPaintEvent* pEvent )
{
QPainter oPainter( viewport() );

if( bIsCursorVisible )
{
QRect r = cursorRect();
r.setWidth(1);
oPainter.fillRect( r, Qt::SolidPattern );
}
QTextEdit::paintEvent( pEvent );

}@

Cursor blinks and that's very good, but I have some other problems with this code. Unfortunetally I can't reproduce them from home. Maybe when I compile this with qt-embedded version I will be able to show them.

Rob