Got a problem; look:

main.cpp
Qt Code: 
  1. #include <QApplication>
  2.  
  3. #include "usc_sip_api.h"
  4. #include "usc_gui.h"
  5. #include "usc_gateway.h"
  6.  
  7. GatewayUnit *uscGatewayUnit = new GatewayUnit(0);
  8.  
  9. int main(int argc, char *argv[])
  10. {
  11. 	init_sip();
  12.  
  13. 	QApplication uscApp(argc, argv);	
  14. 	UscGuiES1 uscGui;
  15. 	uscGui.show();
  16.  
  17. 	return uscApp.exec();
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}

usc_gui.cpp
Qt Code: 
  1. #include <QPalette>
  2. #include <QtGui>
  3.  
  4. #include "usc_gui.h"
  5. #include "usc_radio_element.h"
  6. #include "usc_gateway.h"
  7.  
  8. UscGuiES1::UscGuiES1(QWidget *parent)
  9. 	: QWidget(parent)
  10. {
  11. 	UscRadioElement uscRadioElement;
  12. 	uscRadioElement.show();	
  13.  
  14. 	setWindowTitle(tr("Universal SIP Client"));
  15. }
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usc_radio_element.cpp
Qt Code: 
  1. #include <QPalette>
  2. #include <QtGui>
  3.  
  4. #include "usc_gui.h"
  5. #include "usc_radio_element.h"
  6.  
  7. UscRadioElement::UscRadioElement(QWidget *parent)
  8. 	: QWidget(parent)
  9. {
  10. 	radioButton	= new QPushButton(tr("R1"));
  11. 	rxButton	= new QPushButton(tr("Rx"));
  12. 	txButton	= new QPushButton(tr("Tx"));
  13. 	pttButton	= new QPushButton(tr("PTT"));
  14.  
  15. 	QVBoxLayout *rxtxLayout	= new QVBoxLayout;
  16. 	rxtxLayout->addWidget(rxButton);
  17. 	rxtxLayout->addWidget(txButton);
  18.  
  19. 	QHBoxLayout *topLayout	= new QHBoxLayout;
  20. 	topLayout->addWidget(radioButton);
  21. 	topLayout->addLayout(rxtxLayout);
  22.  
  23. 	QVBoxLayout *mainLayout	= new QVBoxLayout;
  24. 	mainLayout->addLayout(topLayout);
  25. 	mainLayout->addWidget(pttButton);
  26.  
  27. 	setLayout(mainLayout);
  28. }
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I got no exception at compiling but my window is empty when I start the application.

What is my mistake, what can I do to solve this problem?


Yours Sincerely
Walsi