Where is my QPushButtons

[HelloDan]

Test::Test(QWidget* parent):QDialog(parent)
{
  	setBackgroundRole(QPalette::Dark);
    setAutoFillBackground(true);
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
    //buttons settings
    settingButton=new QPushButton;
    settingButton->setText("settings");
    settingButton->adjustSize();
  	oneStepButton=new QPushButton;
  	oneStepButton->setText("one step");
  	oneStepButton->adjustSize();
  	runAllButton=new QPushButton;
  	runAllButton->setText("run all");
  	runAllButton->adjustSize();
  	//place the buttons in a proper position
  	settingButton->move(5, 5);
    oneStepButton->move(5 + settingButton->width() + 5, 5);
    runAllButton->move(15+settingButton->width()+oneStepButton->width(),5);
 
    //plotter settings
    minX = 0.0;
    maxX = 10.0;
    numXTicks = 5;
 
    minY = 0.0;
    maxY = 10.0;
    numYTicks = 5;    
 
    iniPoints();  
    resize(600,400);  
}
 
void Test::refreshPixmap()
{
    pixmap = QPixmap(size());
    pixmap.fill(this, 0, 0);
 
    QPainter painter(&pixmap);
    painter.initFrom(this);
    drawGrid(&painter);
    drawPoints(&painter);
    update();	
}

Test::Test(QWidget* parent):QDialog(parent)
{
  	setBackgroundRole(QPalette::Dark);
    setAutoFillBackground(true);
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    	
    //buttons settings
    settingButton=new QPushButton;
    settingButton->setText("settings");
    settingButton->adjustSize();
  	oneStepButton=new QPushButton;
  	oneStepButton->setText("one step");
  	oneStepButton->adjustSize();
  	runAllButton=new QPushButton;
  	runAllButton->setText("run all");
  	runAllButton->adjustSize();
  	//place the buttons in a proper position
  	settingButton->move(5, 5);
    oneStepButton->move(5 + settingButton->width() + 5, 5);
    runAllButton->move(15+settingButton->width()+oneStepButton->width(),5);
    
    //plotter settings
    minX = 0.0;
    maxX = 10.0;
    numXTicks = 5;

    minY = 0.0;
    maxY = 10.0;
    numYTicks = 5;    
    
    iniPoints();  
    resize(600,400);  
}

void Test::refreshPixmap()
{
    pixmap = QPixmap(size());
    pixmap.fill(this, 0, 0);

    QPainter painter(&pixmap);
    painter.initFrom(this);
    drawGrid(&painter);
    drawPoints(&painter);
    update();	
}

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In this program, I want to draw a coordinate and points in it. above the coordinate, I post three QPushButtons . Now my app can be executed, but the buttons can not turn up, leaving only the coordinate. I don't know why? Do you have any advise?

Thanks!

[HelloDan]

settingButton->show();
oneStepButton->show();
runAllButton->show();


I add these three lines in the constructor function. but the button post in the leftup corner, not in the dialog.

[talk2amulya]

make the dialog as the parent of the buttons

[spirit]

maybe it would be better to use one of the layouts classes to manage controls position insted of using?

...
settingButton->move(5, 5);
oneStepButton->move(5 + settingButton->width() + 5, 5);
runAllButton->move(15+settingButton->width()+oneStepButton->width(),5);
...

...
settingButton->move(5, 5);
oneStepButton->move(5 + settingButton->width() + 5, 5);
runAllButton->move(15+settingButton->width()+oneStepButton->width(),5);
...

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[HelloDan]

settingButton=new QPushButton(this);

it works!

thanks