What is wrong with this simple application..

[mark77]

Hi, anyone can help me and tell me what is wrong with my widget application? It compiles just fine but SettingsDialog never pops up when clicking the button. Obviously there is something I don't understand here.

main.cpp

#include "qmaemo5homescreenadaptor.h"
#include "testwidget.h"
#include "settingsdialog.h"
#include <QtGui>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    TestWidget w;
    QMaemo5HomescreenAdaptor *a = new QMaemo5HomescreenAdaptor(&w);
    a->setSettingsAvailable(true);
    QObject::connect(a, SIGNAL(settingsRequested()), &w, SLOT(showSettingsDialog()));
    w.show();
    app.exec();
}

testwidget.h

#ifndef TESTWIDGET_H
#define TESTWIDGET_H

#include <QtGui>

class TestWidget : public QLabel
{
    Q_OBJECT
public:
    TestWidget();
public slots:
    void showSettingsDialog();
};

#endif

testwidget.cpp

#include "testwidget.h"
#include "settingsdialog.h"

#include <QtGui>

TestWidget::TestWidget() : QLabel()
{
    setText("Testing only");
}

void TestWidget::showSettingsDialog()
{
    SettingsDialog settingsWindow;
    settingsWindow.show();
}

settingsdialog.h

#ifndef SETTINGSDIALOG_H
#define SETTINGSDIALOG_H

#include <QtGui>

class SettingsDialog : public QDialog
{
    Q_OBJECT
public:
    SettingsDialog();
private:
    QLabel *label;
    QLineEdit *lineEdit;
};

#endif

settingsdialog.cpp

#include "settingsdialog.h"

#include <QtGui>

SettingsDialog::SettingsDialog() : QDialog()
{
    label = new QLabel(tr("Example:"));
    lineEdit = new QLineEdit;
    label->setBuddy(lineEdit);

    QHBoxLayout *hLayout = new QHBoxLayout;
    hLayout->addWidget(label);
    hLayout->addWidget(lineEdit);

    setLayout(hLayout);
    setWindowTitle(tr("Settings"));
}

Thanks in advance!

[divanov]

You create SettingsDialog on the stack and it gets destroyed as soon as showSettingsDialog() quits.