problem with signal/slot mechanismus

[MarkoSan]

Hello to all, my dear experts!

I have following line:

connect(m_pLeftButtonCaptionInputWidget->ptrTextInput(),
            SIGNAL(textChanged()),
            this,
            SLOT(previewButtonSetText()));

connect(m_pLeftButtonCaptionInputWidget->ptrTextInput(),
            SIGNAL(textChanged()),
            this,
            SLOT(previewButtonSetText()));

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m_pLeftButtonCaptionInputWidget is declared as follows:

#ifndef CDATAINPUTWIDGET_H_
#define CDATAINPUTWIDGET_H_
 
// qt includes
#include <QLabel>
#include <QLineEdit>
#include <QPointer>
#include <QHBoxLayout>
#include <QGroupBox>
#include <QFileDialog>
#include <QStringList>
#include <QPushButton>
 
// forward declarations
class QWidget;
class QString;
 
class CDataInputWidget : public QWidget
{
    Q_OBJECT
 
public:
    CDataInputWidget(QWidget* pParent=0,
                     QString strLabelCaption="Caption",
                     QString strDefaultValue="Caption",
                     bool boolCheckable=false,
                     bool boolFileDialog=false);
    ~CDataInputWidget();
 
    inline QPointer<QHBoxLayout> layout()
        { return m_pLayout; };
    inline QPointer<QLabel> label()
        { return m_pLabel; };
    inline QString textInput()
        { return m_pTextInput->text(); };
    inline QPointer<QLineEdit> ptrTextInput()
        { return m_pTextInput; };
    inline QPointer<QGroupBox> inputGroupBox()
        { return m_pInputGroupBox; };
    inline QPointer<QVBoxLayout> mainLayout()
        { return m_pMainLayout; };
    inline QPointer<QFileDialog> fileDiaog()
        { return m_pFileDialog; };
    inline QString path()
        { return m_strPath; };
    inline void setPath(QString strPath)
        { m_strPath=strPath; };
    inline QPointer<QPushButton> fileBrowserButton()
        { return m_pFileBrowserButton; };
 
private:
    QPointer<QHBoxLayout> m_pLayout;
    QPointer<QLabel> m_pLabel;
    QPointer<QLineEdit> m_pTextInput;
    QPointer<QGroupBox> m_pInputGroupBox;
    QPointer<QVBoxLayout> m_pMainLayout;
    QPointer<QFileDialog> m_pFileDialog;
    QString m_strPath;
    QPointer<QPushButton> m_pFileBrowserButton;
 
private slots:
    void showFileBrowser();
};
 
#endif /*CDATAINPUTWIDGET_H_*/

#ifndef CDATAINPUTWIDGET_H_
#define CDATAINPUTWIDGET_H_

// qt includes
#include <QLabel>
#include <QLineEdit>
#include <QPointer>
#include <QHBoxLayout>
#include <QGroupBox>
#include <QFileDialog>
#include <QStringList>
#include <QPushButton>

// forward declarations
class QWidget;
class QString;

class CDataInputWidget : public QWidget
{
    Q_OBJECT

public:
    CDataInputWidget(QWidget* pParent=0,
                     QString strLabelCaption="Caption",
                     QString strDefaultValue="Caption",
                     bool boolCheckable=false,
                     bool boolFileDialog=false);
    ~CDataInputWidget();
    
    inline QPointer<QHBoxLayout> layout()
        { return m_pLayout; };
    inline QPointer<QLabel> label()
        { return m_pLabel; };
    inline QString textInput()
        { return m_pTextInput->text(); };
    inline QPointer<QLineEdit> ptrTextInput()
        { return m_pTextInput; };
    inline QPointer<QGroupBox> inputGroupBox()
        { return m_pInputGroupBox; };
    inline QPointer<QVBoxLayout> mainLayout()
        { return m_pMainLayout; };
    inline QPointer<QFileDialog> fileDiaog()
        { return m_pFileDialog; };
    inline QString path()
        { return m_strPath; };
    inline void setPath(QString strPath)
        { m_strPath=strPath; };
    inline QPointer<QPushButton> fileBrowserButton()
        { return m_pFileBrowserButton; };

private:
    QPointer<QHBoxLayout> m_pLayout;
    QPointer<QLabel> m_pLabel;
    QPointer<QLineEdit> m_pTextInput;
    QPointer<QGroupBox> m_pInputGroupBox;
    QPointer<QVBoxLayout> m_pMainLayout;
    QPointer<QFileDialog> m_pFileDialog;
    QString m_strPath;
    QPointer<QPushButton> m_pFileBrowserButton;

private slots:
    void showFileBrowser();
};

#endif /*CDATAINPUTWIDGET_H_*/

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and its implemenation is:

#include "CDataInputWidget.h"
 
CDataInputWidget::CDataInputWidget(QWidget* pParent,
                                   QString strLabelCaption,
                                   QString strDefaultValue,
                                   bool boolCheckable,
                                   bool boolFileDialog)
: QWidget(pParent)
{
    m_pMainLayout=new QVBoxLayout();    // creates new layout
    Q_CHECK_PTR(m_pMainLayout);    // checks creation
 
    m_pLayout=new QHBoxLayout();    // creates new layout
    Q_CHECK_PTR(m_pLayout);    // checks creation
 
    m_pLabel=new QLabel(strLabelCaption, this);    // creates new label
    Q_CHECK_PTR(m_pLabel);    // checks creation
 
    m_pTextInput=new QLineEdit(strDefaultValue, this);    // creates new text input
    Q_CHECK_PTR(m_pTextInput);    // checks creation
 
    m_pLayout->addWidget(m_pLabel);    // adds label to layout
    m_pLayout->addWidget(m_pTextInput);    // adds text input widget
 
    m_pInputGroupBox=new QGroupBox(strLabelCaption, this);    // creates new gb
    Q_CHECK_PTR(m_pInputGroupBox);    // checks creation
    if (boolCheckable==true)
    {
        m_pInputGroupBox->setCheckable(true);    // toogles check mode
        if (boolFileDialog==true)
        {
            m_pFileBrowserButton=new QPushButton(tr("Browse ..."), this);    // creates new button
            Q_CHECK_PTR(m_pFileBrowserButton);    // checks creation
            connect(m_pFileBrowserButton,
                    SIGNAL(clicked()),
                    this,
                    SLOT(showFileBrowser()));    // connect click to slot
            m_pLayout->addWidget(m_pFileBrowserButton);    // addds button to layout
        }    // if
        m_pInputGroupBox->setLayout(m_pLayout);    // sets layout
    };    // if
    m_pMainLayout->addWidget(m_pInputGroupBox);    // adds wudget to layout
    setLayout(m_pMainLayout);
}
 
CDataInputWidget::~CDataInputWidget()
{
}
 
void CDataInputWidget::showFileBrowser()
{
    m_pFileDialog=new QFileDialog(this, tr("Choose picture"),
                                  "images/application",
                                  "*.png");    // creates new file diaog
    Q_CHECK_PTR(m_pFileDialog);    // checks creation
    if(m_pFileDialog->exec())
    {
        setPath(m_pFileDialog->selectedFiles().at(0));
        m_pTextInput->setText(path());
    }
}

#include "CDataInputWidget.h"

CDataInputWidget::CDataInputWidget(QWidget* pParent,
                                   QString strLabelCaption,
                                   QString strDefaultValue,
                                   bool boolCheckable,
                                   bool boolFileDialog)
: QWidget(pParent)
{
    m_pMainLayout=new QVBoxLayout();    // creates new layout
    Q_CHECK_PTR(m_pMainLayout);    // checks creation

    m_pLayout=new QHBoxLayout();    // creates new layout
    Q_CHECK_PTR(m_pLayout);    // checks creation

    m_pLabel=new QLabel(strLabelCaption, this);    // creates new label
    Q_CHECK_PTR(m_pLabel);    // checks creation
    
    m_pTextInput=new QLineEdit(strDefaultValue, this);    // creates new text input
    Q_CHECK_PTR(m_pTextInput);    // checks creation
    
    m_pLayout->addWidget(m_pLabel);    // adds label to layout
    m_pLayout->addWidget(m_pTextInput);    // adds text input widget
    
    m_pInputGroupBox=new QGroupBox(strLabelCaption, this);    // creates new gb
    Q_CHECK_PTR(m_pInputGroupBox);    // checks creation
    if (boolCheckable==true)
    {
        m_pInputGroupBox->setCheckable(true);    // toogles check mode
        if (boolFileDialog==true)
        {
            m_pFileBrowserButton=new QPushButton(tr("Browse ..."), this);    // creates new button
            Q_CHECK_PTR(m_pFileBrowserButton);    // checks creation
            connect(m_pFileBrowserButton,
                    SIGNAL(clicked()),
                    this,
                    SLOT(showFileBrowser()));    // connect click to slot
            m_pLayout->addWidget(m_pFileBrowserButton);    // addds button to layout
        }    // if
        m_pInputGroupBox->setLayout(m_pLayout);    // sets layout
    };    // if
    m_pMainLayout->addWidget(m_pInputGroupBox);    // adds wudget to layout
    setLayout(m_pMainLayout);
}

CDataInputWidget::~CDataInputWidget()
{
}

void CDataInputWidget::showFileBrowser()
{
    m_pFileDialog=new QFileDialog(this, tr("Choose picture"),
                                  "images/application",
                                  "*.png");    // creates new file diaog
    Q_CHECK_PTR(m_pFileDialog);    // checks creation
    if(m_pFileDialog->exec())
    {
        setPath(m_pFileDialog->selectedFiles().at(0));
        m_pTextInput->setText(path());
    }
}

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Now, here is the problem. Object, instanatiated from this class does not recognize signal textChanged() according to debug output:

no such signal QTextEdit::textChanged()

which I need to notify parent object that on text on button has been changed and it the button caption must be updated according to new text.