connecting ComboBox with TreeWidget

[Shien]

Hi,

I need to connect spin box, push button and tree widget together. I made that pretty easy while it's on the same widget but I need to show tree widget in another widget.

Can anyone tell me. I tried to connect it. I thought I made it. No errors but then it simple stops working :/

I connected widget where the push button was and widget where tree widget should appear.

any ideas?

by the way. what it means setbuddy?

[Shien]

When I connecting everything on the same widget I am using this slot

void CreatePlanet::applyButtonClicked()
{
    treeW->clear();
    QList<QTreeWidgetItem *> items;
    for (int i = 1; i < sizeSpinbox->value()+1; ++i)
        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("dwelling: %1").arg(i))));
    treeW->insertTopLevelItems(0, items);
 
}

void CreatePlanet::applyButtonClicked()
{
    treeW->clear();
    QList<QTreeWidgetItem *> items;
    for (int i = 1; i < sizeSpinbox->value()+1; ++i)
        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("dwelling: %1").arg(i))));
    treeW->insertTopLevelItems(0, items);

}

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but when i am trying to separate it:

createplanet.cpp

signals:
    void spinBoxValue(int);
public slots:
    void applyButtonClicked ();

signals:
    void spinBoxValue(int);
public slots:
    void applyButtonClicked ();

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createplanet.cpp

void CreatePlanet::applyButtonClicked()
{
    treeW->clear();
    QList<QTreeWidgetItem *> items;
    for (int i = 1; i < sizeSpinbox->value()+1; ++i)
        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("dwelling: %1").arg(i))));
    treeW->insertTopLevelItems(0, items);
 
}

void CreatePlanet::applyButtonClicked()
{
    treeW->clear();
    QList<QTreeWidgetItem *> items;
    for (int i = 1; i < sizeSpinbox->value()+1; ++i)
        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("dwelling: %1").arg(i))));
    treeW->insertTopLevelItems(0, items);

}

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tree.h

public:
    Tree(QWidget *parent = 0);
    QTreeWidget *treeW;
signals:
 
public slots:
private slots:
    void setNumber(int);

public:
    Tree(QWidget *parent = 0);
    QTreeWidget *treeW;
signals:

public slots:
private slots:
    void setNumber(int);

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tree.cpp

Tree::Tree(QWidget *parent) :
    QWidget(parent)
{
    treeW = new QTreeWidget(this);
    treeW->setColumnCount(2);
    QStringList headers;
    headers << "Dwelling" << "Type";
    treeW->setHeaderLabels(headers);
 
 
 
    grdLayout = new QGridLayout(this);
 
    grdLayout->addWidget(treeW,0,0,1,1);
    this->setLayout(grdLayout);
}
void Tree::setNumber(int inum)
{
 
}

Tree::Tree(QWidget *parent) :
    QWidget(parent)
{
    treeW = new QTreeWidget(this);
    treeW->setColumnCount(2);
    QStringList headers;
    headers << "Dwelling" << "Type";
    treeW->setHeaderLabels(headers);



    grdLayout = new QGridLayout(this);

    grdLayout->addWidget(treeW,0,0,1,1);
    this->setLayout(grdLayout);
}
void Tree::setNumber(int inum)
{
    
}

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mainwidget.cpp

CreatePlanet *viewPlanetWidget = new CreatePlanet(createViewport);
 createViewport->addWidget(viewPlanetWidget);
 dwellingsTreeViewport = new QStackedWidget(this);
 Tree *dwellingsTree = new Tree(dwellingsTreeViewport);
 
 dwellingsTreeViewport->addWidget(dwellingsTree);
 connect(viewPlanetWidget,SIGNAL(spinBoxValue(int)),dwellingsTree,SLOT(setNumber(int)));

CreatePlanet *viewPlanetWidget = new CreatePlanet(createViewport);
 createViewport->addWidget(viewPlanetWidget);
 dwellingsTreeViewport = new QStackedWidget(this);
 Tree *dwellingsTree = new Tree(dwellingsTreeViewport);

 dwellingsTreeViewport->addWidget(dwellingsTree);
 connect(viewPlanetWidget,SIGNAL(spinBoxValue(int)),dwellingsTree,SLOT(setNumber(int)));

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what could I add into setNumbet(int) slot?

Is correct way to connect different class objects?