Resize application for different resolutions

[wysota]

In that case attach the code you use to create the user interface.

[Mrdata]

Here's how i initialize my application

Mainwindow = new QWidget;
setCentralWidget( Mainwindow );
Mainwindow->showMaximized();
 
Top_GroupBox = new QGroupBox( tr( "Group 1" ) );
QGridLayout *MyLayout1 = new QGridLayout;
 
.......
MyLayout1->addWidget( Label1, 1, 0, Qt::AlignRight );
MyLayout1->addWidget( LineEdit1, 1, 1, Qt::AlignLeft );
.......
Top_GroupBox->setLayout( MyLayout1 );
 
// create 2 more Qgridlayouts here
.....
// add all 3 Qgridlayouts to the mainwindow
.....

Mainwindow = new QWidget;
setCentralWidget( Mainwindow );
Mainwindow->showMaximized();

Top_GroupBox = new QGroupBox( tr( "Group 1" ) );
QGridLayout *MyLayout1 = new QGridLayout;

.......
MyLayout1->addWidget( Label1, 1, 0, Qt::AlignRight );
MyLayout1->addWidget( LineEdit1, 1, 1, Qt::AlignLeft );
.......
Top_GroupBox->setLayout( MyLayout1 );

// create 2 more Qgridlayouts here
.....
// add all 3 Qgridlayouts to the mainwindow
.....

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[wysota]

It'd be nice if you also provided the contents of the layouts and the call to setLayout on Mainwindow.