Hi, im trying to make program including simple version of model from Basic Sort/File Model Example , but I get an empty window and warning :
QWidget::setLayout: Attempting to set QLayout "" on EGlowny "", which already has layout

I've checked code few times and I don't see where I did this.

Here you have fragment of my code:

main.cpp

Qt Code: 
  1. #include <QApplication>
  2. #include "eglowny.h"
  3. extern QAbstractItemModel *asd(QObject *parent);
  4. extern void wbaze();
  5. int main(int argc, char *argv[])
  6. {
  7.     QApplication app(argc, argv);
  8.     EGlowny okno;
  9.     okno.setSourceModel(asd(&okno));
  10.     okno.show();
  11.     return app.exec();
  12. }
To copy to clipboard, switch view to plain text mode 

Eglowny.h

Qt Code: 
  1. #ifndef EGLOWNY_H
  2. #define EGLOWNY_H
  3. #include <QMainWindow>
  4. #include <QMenu>
  5. #include <QMenuBar>
  6. #include <QFileDialog>
  7. #include <QMessageBox>
  8. #include <QAbstractItemModel>
  9. #include <QTreeView>
  10. #include <QSortFilterProxyModel>
  11. #include <QComboBox>
  12. #include <QGridLayout>
  13. extern void wbaze(QString &nazwapliku);
  14. extern void zapiszbaze(QString &nazwapliku);
  15. class ToolBar;
  16. QT_FORWARD_DECLARE_CLASS(QMenu)
  17. QT_FORWARD_DECLARE_CLASS(QSignalMapper)
  18. class EGlowny : public QMainWindow
  19. {
  20.     Q_OBJECT
  21.  
  22. public:
  23.     explicit EGlowny(QWidget *parent = 0);
  24.     void setSourceModel(QAbstractItemModel *model);
  25. private:
  26.    void pasekmenu();
  27.    void wnetrzeokna();
  28.     QSortFilterProxyModel *proxyModel;
  29.     QGridLayout *proxyLayout;
  30.     QTreeView *proxyView;
  31.     QLabel *filterPatternLabel;
  32.     QLabel *filterColumnLabel;
  33.     QLineEdit *filterPatternLineEdit;
  34.     QComboBox *filterColumnComboBox;
  35. private slots:
  36.  
  37.    void filterREChanged();
  38.    void filterColumnChanged();
  39. };
  40. #endif // EGLOWNY_H
To copy to clipboard, switch view to plain text mode 




Eglowny.cpp
Qt Code: 
  1. #include "eglowny.h"
  2.  
  3. EGlowny::EGlowny(QWidget *parent) :
  4.     QMainWindow(parent)
  5. {
  6.     pasekmenu();
  7.     wnetrzeokna();
  8.     setWindowTitle("Program");
  9.     resize(800, 600);
  10. }
  11.  
  12. void EGlowny::wnetrzeokna()
  13. {
  14.     proxyModel = new QSortFilterProxyModel;
  15.     proxyModel->setDynamicSortFilter(true);
  16.  
  17.     proxyView = new QTreeView;
  18.     proxyView->setRootIsDecorated(false);
  19.     proxyView->setAlternatingRowColors(true);
  20.     proxyView->setModel(proxyModel);
  21.     proxyView->setSortingEnabled(true);
  22.  
  23.     filterPatternLineEdit = new QLineEdit;
  24.     filterPatternLabel = new QLabel(tr("Filter Pattern: "));
  25.  
  26.     filterColumnComboBox = new QComboBox;
  27.     filterColumnComboBox->addItem(tr("1"));
  28.     filterColumnComboBox->addItem(tr("2"));
  29.     filterColumnComboBox->addItem(tr("3"));
  30.     filterColumnLabel = new QLabel(tr("Filter column: "));
  31.  
  32. connect (filterPatternLineEdit, SIGNAL(textChanged(QString)),this,SLOT(filterREChanged()));
  33.     connect (filterColumnComboBox, SIGNAL(currentIndexChanged(int)),this,SLOT(filterColumnChanged()));
  34.  
  35.     proxyLayout = new QGridLayout;
  36.     proxyLayout->addWidget(proxyView, 0, 0, 1, 3);
  37.     proxyLayout->addWidget(filterPatternLabel, 1, 0);
  38.     proxyLayout->addWidget(filterPatternLineEdit, 1, 1, 1, 2);
  39.     proxyLayout->addWidget(filterColumnLabel, 2, 0);
  40.     proxyLayout->addWidget(filterColumnComboBox, 2, 1, 1, 2);
  41.     setLayout(proxyLayout);
  42.  
  43.     proxyView->sortByColumn(1,Qt::AscendingOrder);
  44.     filterColumnComboBox->setCurrentIndex(1);
  45. }
  46. void EGlowny::pasekmenu()
  47. {
  48.     QMenu *Plik = menuBar()->addMenu(tr("Baza"));
  49.     QAction *action = Plik->addAction(tr("..."));
  50. }
To copy to clipboard, switch view to plain text mode 

baz.h - from this file comes extern functions

Qt Code: 
  2. {
  3.     QStandardItemModel *model = new QStandardItemModel(0, 3, parent);
  4.     model->setHeaderData(0, Qt::Horizontal, QObject::tr("Subject"));
  5.     model->setHeaderData(1, Qt::Horizontal, QObject::tr("Sender"));
  6.     model->setHeaderData(2, Qt::Horizontal, QObject::tr("Date"));
  7.     dodajwpis(model, "as", "qb", "sac","wd");
  8.     dodajwpis(model, "aa", "bs", "sc","asd");
  9.     dodajwpis(model, "xw", "yx", "sz","saa");
  10.     return model;
  11.  }
  12.  
  13. void dodajwpis(QAbstractItemModel *model, QString wpistyp, QString wpisnazwa, QString wpiszaw, QString wpiskraj)
  14. {
  15.     model->insertRow(0);
  16.     model->setData(model->index(0,0),wpistyp);
  17.     model->setData(model->index(0,1),wpisnazwa);
  18.     model->setData(model->index(0,2),wpiszaw);
  19.     model->setData(model->index(0,3),wpiskraj);
  20. }
To copy to clipboard, switch view to plain text mode