Focus on a QWidget item in a QWidget

I can't believe no one has asked about this (or at least that I couldn't find it)... but let's see if someone can give me an answer :)

I have a QDialog with a QFrame on it (and a QDialogButtonBox, and a few other widgets). When I try to place a QWidget "in" the frame (setParent(frame)) and show it (note: under Windows I have to have a move(0,0) for the widget or else the widgets start sliding down and to the right until it hits a certain point, then resets), the widgets on the widget (i.e. a QLineEdit on the 'page') do not get the focus. I've tried page->setFocus() -- but that just allows the QDialogButtonBox to have the default button work (weird, but it doesn't work (under Linux) until I added the setFocus()). I've tried calling a function in the page to set the focus to the QLineEdit (m_name->setFocus())... still nothing.

Can anyone see an obvious solution? Or do I need to try to get a small compilable example to post first?

Thanks,

Vycke

Better post an example and I will answer the post by correcting it. It is easier that way.

I'm not sure if it's going to help with the focus problem, but it sounds like you forgot to add a layout for that frame.

Ok. I replaced the QFrame with a QVBoxLayout & am doing an insertWidget(0, page) (instead of just making the QFrame the parent of the page) -- even with the page->setFocus() call, it won't show.

I'm trying to make a small example to test this, but any other possible hints while I try to trim it down would be nice :)

Vycke

Maybe you set QWidget::focusPolicy to Qt::NoFocus somewhere?

(You'll have to put this into an app... qtest.ui is just a dialog (named QTestDlg) w/a QVBoxLayout, qname.ui is a widget (named QNameDlg) w/a QLineEdit)

testdlg.hpp

Code:

---

#include "ui_qtest.hpp"
 
class CTestDlg : public QDialog, private Ui::QTestDlg
{
   Q_OBJECT
 
public:
   CTestDlg(QWidget* parent = 0);
   ~CTestDlg();
 
   void addPage(QWidget* page);
};

---

testdlg.cpp

Code:

---

#include "testdlg.hpp"
 
CTestDlg::CTestDlg(QWidget* parent) : QDialog(parent)
{
   this->setupUi(this);
}
 
CTestDlg::~CTestDlg()
{
}
 
void CTestDlg::addPage(QWidget* page)
{
   if (page)
   {
      vboxLayout->insertWidget(0, page);
      page->show();
      page->setFocus(Qt::OtherFocusReason);
   }
}

---

and calling the above with

Code:

---

CTestDlg* test = new CTestDlg(this);
CNameDlg* page = new CNameDlg();
 
test->addPage(page);
test->show();

---

[I hope this is enough to show what I have -- and will give some idea what I'm doing & why it isn't setting the focus on the QLineEdit]

Vycke

Quote:

---

Originally Posted by jacek

Maybe you set QWidget::focusPolicy to Qt::NoFocus somewhere?

---

The widgets/dialog both had Qt::NoFocus set -- but changing both to Qt::StrongFocus didn't fix this.

Please post a compilable example.

Ok.. Here's the code:

main.cpp

Code:

---

#include <QtGui/QApplication>
 
#include "dialog.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Dialog dialog;
    CNameDlg test;
    dialog.addPage(&test);
    return dialog.exec();
}

---

dialog.cpp

Code:

---

#include <QtGui>
 
#include "dialog.h"
 
Dialog::Dialog()
{
   this->setupUi(this);
}
 
void Dialog::addPage(QWidget* page)
{
   if (page)
   {
      vboxLayout->insertWidget(0, page);
      page->show();
      page->setFocus(Qt::OtherFocusReason);
   }
}
 
CNameDlg::CNameDlg(QWidget* parent) : QWidget(parent)
{
   this->setupUi(this);
}

---

dialog.h

Code:

---

#ifndef DIALOG_H
#define DIALOG_H
 
#include <QtGui/QDialog>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QVBoxLayout>
#include <QtGui/QWidget>
 
#include <QtGui/QApplication>
 
class Dialog : public QDialog
{
    Q_OBJECT
 
public:
    Dialog();
    void addPage(QWidget* page);
 
private:
   QWidget *verticalLayout;
   QVBoxLayout *vboxLayout;
   QLabel *label;
 
   void setupUi(QDialog *Dialog)
   {
   if (Dialog->objectName().isEmpty())
      Dialog->setObjectName(QString::fromUtf8("Dialog"));
   Dialog->resize(535, 302);
   Dialog->setFocusPolicy(Qt::StrongFocus);
   verticalLayout = new QWidget(Dialog);
   verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
   verticalLayout->setGeometry(QRect(10, 30, 511, 221));
   vboxLayout = new QVBoxLayout(verticalLayout);
   vboxLayout->setObjectName(QString::fromUtf8("vboxLayout"));
   vboxLayout->setContentsMargins(0, 0, 0, 0);
   label = new QLabel(Dialog);
   label->setObjectName(QString::fromUtf8("label"));
   label->setGeometry(QRect(10, 10, 54, 18));
 
   Dialog->setWindowTitle(QApplication::translate("Dialog", "Dialog", 0, QApplication::UnicodeUTF8));
   label->setText(QApplication::translate("Dialog", "Test", 0, QApplication::UnicodeUTF8));
   } // setupUi
};
 
 
class CNameDlg : public QWidget
{
   Q_OBJECT
 
public:
   CNameDlg(QWidget *parent = 0);
   QLabel *label;
   QLineEdit *m_name;
 
   void setupUi(QWidget *CNameDlg)
    {
    if (CNameDlg->objectName().isEmpty())
       CNameDlg->setObjectName(QString::fromUtf8("CNameDlg"));
    CNameDlg->resize(410, 111);
    CNameDlg->setFocusPolicy(Qt::StrongFocus);
    label = new QLabel(CNameDlg);
    label->setObjectName(QString::fromUtf8("label"));
    label->setGeometry(QRect(10, 10, 250, 18));
    m_name = new QLineEdit(CNameDlg);
    m_name->setObjectName(QString::fromUtf8("m_name"));
    m_name->setGeometry(QRect(10, 60, 240, 27));
    } // setupUi
};
 
#endif

---

and finally focus.pro

Code:

---

HEADERS     = dialog.h
SOURCES     = dialog.cpp \
              main.cpp
 
# install
target.path = .
sources.files = $$SOURCES $$HEADERS *.pro
sources.path = .
INSTALLS += target sources

---

Note that some of the code was copied from the compile of the .ui files I have.

If you compile & run this, you'll have a dialog, with a label ("test") and an QLineEdit. The QLineEdit is +not+ the focus.

Vycke

It seems that the problem is caused by "page->setFocus(Qt::OtherFocusReason);" line --- comment it out and it should work. Other solution is make invoke setFocusProxy( m_name ) in CNameDlg.

Quote:

---

Originally Posted by jacek

It seems that the problem is caused by "page->setFocus(Qt::OtherFocusReason);" line --- comment it out and it should work. Other solution is make invoke setFocusProxy( m_name ) in CNameDlg.

---

Removing the setFocus() call didn't work (4.3.2... might be a bug there). But adding the setFocusProxy() in the contructor of CNameDlg did.

Thanks so much.

Vycke