QT hangs my toolbar and its buttons - qt

Question

I've created 2 classes, each:
has QWidget as a parent
has Q_OBJECT macros
inits some actions, creates menubar and toolbar, and connects actions to them
Then I created the main program file, created QMainWindow, and init my two classes by qmainwnd pointer.
And what I've got - menu works, the second toolbar works, but the first toolbar (created by class 1) doesn't respond to mouse clicks.
What happed with it? Why I can not even move this first toolbar or click its buttons?
Here a sample:
main.cpp
#include <QApplication>
#include <QMainWindow>
#include "CModDocument.h"
#include "CModEditor.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QMainWindow wnd;
// init CA
CModDocument a(&wnd);
// init CB
CModEditor b(&wnd);
wnd.show();
return app.exec();
}
CModDocument.h
#ifndef CMODDOCUMENT_H
#define CMODDOCUMENT_H
#include <QWidget>
QT_BEGIN_NAMESPACE
class QAction;
class QToolBar;
class QMainWindow;
QT_END_NAMESPACE
class CModDocument: public QWidget
{
Q_OBJECT
public:
CModDocument(QWidget *parent = 0);
QMainWindow *getMainWnd();
public slots:
void newFile();
void open();
bool save();
bool saveAs();
private:
void createActions();
void createToolBars();
void interCom();
QMainWindow *mainWnd;
QToolBar *fileToolBar;
QAction *newAct;
QAction *openAct;
QAction *saveAct;
QAction *saveAsAct;
};
#endif // CMODDOCUMENT_H
CModDocument.cpp
#include <QtGui>
#include <QDebug>
#include "CModDocument.h"
CModDocument::CModDocument( QWidget *parent )
: QWidget( parent )
, mainWnd( (QMainWindow*)parent )
{
createActions();
createToolBars();
interCom();
mainWnd->statusBar()->showMessage(tr("Ready"));
}
void CModDocument::newFile()
{
qDebug() << "newFile";
}
void CModDocument::open()
{
qDebug() << "open";
}
bool CModDocument::save()
{
qDebug() << "save";
bool retVal;
return retVal;
}
bool CModDocument::saveAs()
{
qDebug() << "saveAs";
bool retVal;
return retVal;
}
void CModDocument::createActions()
{
newAct = new QAction(tr("&New"), this);
newAct->setShortcuts(QKeySequence::New);
newAct->setStatusTip(tr("Create a new file"));
openAct = new QAction(tr("&Open..."), this);
openAct->setShortcuts(QKeySequence::Open);
openAct->setStatusTip(tr("Open an existing file"));
saveAct = new QAction(tr("&Save"), this);
saveAct->setShortcuts(QKeySequence::Save);
saveAct->setStatusTip(tr("Save the document to disk"));
saveAsAct = new QAction(tr("Save &As..."), this);
saveAsAct->setShortcuts(QKeySequence::SaveAs);
saveAsAct->setStatusTip(tr("Save the document under a new name"));
}
void CModDocument::createToolBars()
{
fileToolBar = mainWnd->addToolBar(tr("File"));
fileToolBar->addAction(newAct);
fileToolBar->addAction(openAct);
fileToolBar->addAction(saveAct);
}
void CModDocument::interCom()
{
connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
}
CModEditor.h
#ifndef CMODEDITOR_H
#define CMODEDITOR_H
#include <QWidget>
// #include "CModEdiWidget.h"
QT_BEGIN_NAMESPACE
class QMainWindow;
class QAction;
class QMenu;
class QMenuBar;
class QToolBar;
QT_END_NAMESPACE
class CModEditor : public QWidget
{
Q_OBJECT
public:
CModEditor(QWidget *parent = 0);
public slots:
void cut();
private:
void createActions();
void createToolBars();
void interCom();
QAction *cutAct;
QToolBar *editToolBar;
// parent
QMainWindow *mainWnd;
};
#endif
CModEditor.cpp
#include <QtGui>
#include <QDebug>
#include "CModEditor.h"
CModEditor::CModEditor(QWidget *parent)
: QWidget(parent)
, mainWnd( (QMainWindow*)parent )
{
createActions();
createToolBars();
interCom();
}
void CModEditor::cut()
{
qDebug() << "cut";
}
void CModEditor::createActions()
{
cutAct = new QAction(tr("Cu&t"), this);
cutAct->setShortcuts(QKeySequence::Cut);
cutAct->setStatusTip(tr("Cut the current selection's contents to the clipboard"));
}
void CModEditor::createToolBars()
{
editToolBar = mainWnd->addToolBar(tr("Edit"));
editToolBar->addAction(cutAct);
editToolBar->setIconSize(QSize(16, 16));
}
void CModEditor::interCom()
{
connect(cutAct, SIGNAL(triggered()), this, SLOT(cut()));
}
build.pro
CONFIG -= app_bundle
HEADERS = CModDocument.h CModEditor.h
SOURCES = CModDocument.cpp CModEditor.cpp main.cpp

Answer 1

The problem seems to be that you are trying to configure the QMainWindow as the parent to two QWidgets. I modified your main() function as follows and it worked:
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QMainWindow wnd;
QWidget w;
// init CA
CModDocument a(&wnd, &w);
// init CB
CModEditor b(&wnd, &w);
wnd.show();
return app.exec();
}
Notice the new QWidget w that parents a and b. I'm not even sure my approach is adequate (it probably isn't). I think it is better to add a QLayout to w and add a and b to that QLayout. Then you could set w as wnd's central widget.