Qt 4.7 on wince, Remove form title bar, Modal window is invalid

[CraigTao]

class CDlgCalibrationMain : public QDialog
{
	Q_OBJECT

public:
	CDlgCalibrationMain(QWidget *parent = 0);
	~CDlgCalibrationMain();

}

CDlgCalibrationMain::CDlgCalibrationMain(QWidget *parent)
	: QDialog(parent)
{
	ui.setupUi(this);
	
	//remove windows title
	this->setWindowFlags(Qt::FramelessWindowHint);
	//this->showMaximized();
	//this->setWindowFlags(this->windowFlags() & ~Qt::WindowMaximizeButtonHint);
	this->setModal(true);
}

CDlgCalibrationMain::~CDlgCalibrationMain()
{

}



//
VirtualRunQt::VirtualRunQt(QWidget *parent, Qt::WFlags flags)
	: QMainWindow(parent, flags), m_bBootCompleted(false)
{
	ui.setupUi(this);

	m_dlg_calibration_main = new CDlgCalibrationMain(this);
	m_dlg_calibration_main->showNormal();
	m_dlg_calibration_main->hide();

	connect(ui.btn_calibration, SIGNAL(clicked(bool)), this, SLOT(on_clicked_btn_calibration()));
}


void VirtualRunQt::on_clicked_btn_calibration()
{
	m_dlg_calibration_main->exec();
}

when i click button call function on_clicked_btn_calibration()
then the dialog show
m_dlg_calibration_main->exec();

but, i can still click other dialog's button,

i don't know why? some could help, please!

God bless you!

[CraigTao]

i use IDE is visual studio 2008,

on windows still the problem,

[CraigTao]

this->setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::SubWindow);

can solve this problem, but Draw presence flicker

[Mijaz]

@CraigTao
Please elaborate your question.
Do you want to remove title bar from your application?

[Mijaz]

@CraigTao

just add this line in projectt.cpp

    setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::WindowTitleHint);

for example in my case:

#include "exit_lock.h"
#include "ui_exit_lock.h"
#include <QMessageBox>
#include <QDebug>
exit_lock::exit_lock(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::exit_lock)
{
    ui->setupUi(this);
    setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::WindowTitleHint);

    connect(ui->zero,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->one,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->two,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->three,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->four,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->five,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->six,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->seven,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->eight,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->nine,SIGNAL(clicked()),this,SLOT(number_check()));
    connect(ui->clear,SIGNAL(clicked()),this,SLOT(number_check()));
}

exit_lock::~exit_lock()
{
    delete ui;
}
void exit_lock::number_check()
{
    QPushButton *any_button = (QPushButton *) sender();

    double storing_numbers;

    QString st_convert;

    storing_numbers = (ui->Password->text() + any_button->text()).toDouble();

    st_convert = QString::number(storing_numbers, 'g', 12);

    ui->Password->setText(st_convert);
}
void exit_lock::on_pushButton_clicked()
{
  //  qDebug() << "Inside Login";
    QString password =ui->Password->text();
    if(password == "12345")
    {
        // qDebug() << " Login password is corrent";
        QMessageBox::information(this, "Login", "password is correct");
        hide(); //if not hide then when exit current window it will come back to previous window

      close();
    }
    else{
        // qDebug() << " Login password is not corrent";
        QMessageBox::warning(this, "Login" ,"Plese try again your password is not correct");
    }
}

[CraigTao]

remove title bar from dialog, and can modal dialog,
i use Qt::Dialog | Qt::FramelessWindowHint Implement function，
but . When the form is displayed, the border appears first, and then the interior of the form is displayed.

[CraigTao]

if use setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::WindowTitleHint);

i use setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::SubWindow);

if use setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint)
perfect! but GUI not modal (i can clicked other child button),
just code modal