Problem with applying old values to interface items

[sergee]

Hello everybody!
I am new to QT, probably i'm missing some basic concept, i wrote a simple demo app (windows/mingw), i am trying to change caption on push button, it works for the first time, but if i'm trying to set old value after that - it doesn't. Here are some examples:

this->ui.pushButton->setText("1");
this->ui.pushButton->setText("2");
this->ui.pushButton->setText("3");

this->ui.pushButton->setText("1");
this->ui.pushButton->setText("2");
this->ui.pushButton->setText("3");

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this works fine, the value displayed on button is "3".

this->ui.pushButton->setText("1");
this->ui.pushButton->setText("2");
this->ui.pushButton->setText("1");

this->ui.pushButton->setText("1");
this->ui.pushButton->setText("2");
this->ui.pushButton->setText("1");

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This example doesn't work as i expect - the displayed value on the button is "2".


similar situation with other properties, for example:

this->ui.spinBox->setEnabled(true);
this->ui.spinBox->setEnabled(false);
this->ui.spinBox->setEnabled(true);

this->ui.spinBox->setEnabled(true);
this->ui.spinBox->setEnabled(false);
this->ui.spinBox->setEnabled(true);

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the element stays in "disabled" state.

i tryed to call update() after each property change for the particular element - that didn't help.

Any suggestions? what am i missing here?
Thank you all in advance.

[mcosta]

For me this code

#include <QtGui/QApplication>
#include <QLabel>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QLabel w;
    w.setText ("1");
    w.setText ("2");
    w.setText ("1");
    w.show();
 
    return a.exec();
}

#include <QtGui/QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QLabel w;
    w.setText ("1");
    w.setText ("2");
    w.setText ("1");
    w.show();

    return a.exec();
}

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ad this

Widget1::Widget1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget1)
{
    ui->setupUi(this);
 
    ui->loadInfoButton->setText ("1");
    ui->loadInfoButton->setText ("2");
    ui->loadInfoButton->setText ("1");
}

Widget1::Widget1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget1)
{
    ui->setupUi(this);

    ui->loadInfoButton->setText ("1");
    ui->loadInfoButton->setText ("2");
    ui->loadInfoButton->setText ("1");
}

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work fine.

What Qt version are you using?