QtPieMenu problem

**MarkoSan** · 23rd May 2009, 12:24

Hello, I've created pie menu using QtPieMenu. Data shown in pei menu is loaded from database dynamically and every button gets its id then (from database). Now, how do I check which button was pressed in piemenu, I need this data. Please help!

**aamer4yu** · 23rd May 2009, 12:49

What signals you get on clicked ?
You can however always check the sender(), cast it to the known class, and use the id to recognise which button was clicked

**MarkoSan** · 23rd May 2009, 12:56

From the pie menu docs, I saw there is activeted(int i) signal, but I cannot catch it, been trying for 2 days now:

Qt Code:

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connect(this,
            SIGNAL(activated(int)),
            this,
            SLOT(languageChanged(int)));

connect(this,
            SIGNAL(activated(int)),
            this,
            SLOT(languageChanged(int)));

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simply does not work and I do not know why.

**aamer4yu** · 23rd May 2009, 17:44

How are you connecting the signal ? Can we see the code ?

**MarkoSan** · 23rd May 2009, 17:50

Ok, here is header file:

Qt Code:

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/*
 * CLangSelectorMenu.h
 *
 *  Created on: 21.5.2009
 *      Author: markofr
 */
 
#ifndef CLANGSELECTORMENU_H_
#define CLANGSELECTORMENU_H_
 
// qt includes
#include <QtCore/QString>
#include <QtGui/QWidget>
#include <QtCore/QList>
#include <QtSql/QSqlQuery>
#include <QtGui/QIcon>
#include <QtGui/QPixmap>
#include <QtGui/QMessageBox>    // debug purposes
 
// custom includes
#include "src/qtpiemenu/qtpiemenu.h"
#include "globals.h"
#include "CDatabaseFoundation.h"
 
// database table declaration
typedef struct
{
    quint32 iLangId;    // language id
    QString strName;    // language name
    QString strTranslatorFilePath;    // language translator file path
    QString strPicPath;    // language picture path
    QString strCurrency;    // language curreny abbervavtion
} langStruct;
 
class CLangSelectorMenu : public QtPieMenu
{
    Q_OBJECT
 
public:
    CLangSelectorMenu(const QString& strText,
                      QWidget* pParent=0,
                      const char* pName=0,
                      quint16 iInnerRadius=60,
                      quint16 iOuterRadius=200);
    ~CLangSelectorMenu();
 
    inline QList<langStruct> languages() const
        { return m_listLanguages; };
    inline QSqlQuery* languageQuery() const
        { return m_pLanguageQuery; };
    inline CDatabaseFoundation* databaseConnector() const
        { return m_pDatabaseConnector; };
    inline quint32 currentLanguage() const
        { return m_iCurrentLanguage; };
    inline void setCurrentLanguage(const quint32& iNewLanguage)
        { m_iCurrentLanguage=iNewLanguage; };
 
private:
    QList<langStruct> m_listLanguages;    // list of languages
    QSqlQuery* m_pLanguageQuery;    // language sql query
    CDatabaseFoundation* m_pDatabaseConnector;    // database connector
    quint32 m_iCurrentLanguage;    // current language id
 
private:
    void fetchLanguages();    // gets languages from database
    void createLangQuery();    // creates query object
    void setupMenu();    // setups language menu according to database
    void showString(const QString& strToShow);    // debug method
 
private slots:
    void ignoreAction();
    void languageChanged(int i);
 
signals:
    void activated(int i);
};
 
#endif /* CLANGSELECTORMENU_H_ */

/*
 * CLangSelectorMenu.h
 *
 *  Created on: 21.5.2009
 *      Author: markofr
 */

#ifndef CLANGSELECTORMENU_H_
#define CLANGSELECTORMENU_H_

// qt includes
#include <QtCore/QString>
#include <QtGui/QWidget>
#include <QtCore/QList>
#include <QtSql/QSqlQuery>
#include <QtGui/QIcon>
#include <QtGui/QPixmap>
#include <QtGui/QMessageBox>    // debug purposes

// custom includes
#include "src/qtpiemenu/qtpiemenu.h"
#include "globals.h"
#include "CDatabaseFoundation.h"

// database table declaration
typedef struct
{
    quint32 iLangId;    // language id
    QString strName;    // language name
    QString strTranslatorFilePath;    // language translator file path
    QString strPicPath;    // language picture path
    QString strCurrency;    // language curreny abbervavtion
} langStruct;

class CLangSelectorMenu : public QtPieMenu
{
    Q_OBJECT

public:
    CLangSelectorMenu(const QString& strText,
                      QWidget* pParent=0,
                      const char* pName=0,
                      quint16 iInnerRadius=60,
                      quint16 iOuterRadius=200);
    ~CLangSelectorMenu();

    inline QList<langStruct> languages() const
        { return m_listLanguages; };
    inline QSqlQuery* languageQuery() const
        { return m_pLanguageQuery; };
    inline CDatabaseFoundation* databaseConnector() const
        { return m_pDatabaseConnector; };
    inline quint32 currentLanguage() const
        { return m_iCurrentLanguage; };
    inline void setCurrentLanguage(const quint32& iNewLanguage)
        { m_iCurrentLanguage=iNewLanguage; };

private:
    QList<langStruct> m_listLanguages;    // list of languages
    QSqlQuery* m_pLanguageQuery;    // language sql query
    CDatabaseFoundation* m_pDatabaseConnector;    // database connector
    quint32 m_iCurrentLanguage;    // current language id

private:
    void fetchLanguages();    // gets languages from database
    void createLangQuery();    // creates query object
    void setupMenu();    // setups language menu according to database
    void showString(const QString& strToShow);    // debug method

private slots:
    void ignoreAction();
    void languageChanged(int i);

signals:
    void activated(int i);
};

#endif /* CLANGSELECTORMENU_H_ */

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and here is its implementation:

Qt Code:

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/*
 * CLangSelectorMenu.cpp
 *
 *  Created on: 21.5.2009
 *      Author: markofr
 */
 
#include "CLangSelectorMenu.h"
 
CLangSelectorMenu::CLangSelectorMenu(const QString& strText,
                                     QWidget* pParent,
                                     const char* pName,
                                     quint16 iInnerRadius,
                                     quint16 iOuterRadius)
    : QtPieMenu(strText,
                pParent,
                pName,
                static_cast<uint>(iInnerRadius),
                static_cast<uint>(iOuterRadius))
{
    m_pDatabaseConnector=CDatabaseFoundation::getInstance(strdbType, strdbHost, strDatabaseName, strdbUserName, strdbPassword);
    Q_CHECK_PTR(m_pDatabaseConnector);    // checks creation
 
    setCurrentLanguage(1);    // test purposes
    createLangQuery();    // creates query object
    fetchLanguages();    // creates language list
    setupMenu();    // sets up menu
    connect(this,
            SIGNAL(activated(int)),
            this,
            SLOT(languageChanged(int)));
}
 
CLangSelectorMenu::~CLangSelectorMenu()
{
}
 
void CLangSelectorMenu::fetchLanguages()
{
    langStruct tempRecord;
 
    languageQuery()->exec("SELECT * FROM erosystem.language WHERE InUse=TRUE;");    // executes mysql query
    if(languageQuery()->isActive())
    {
        // query active, no errors
        while(languageQuery()->next())
        {
            // fetch records
            tempRecord.iLangId=languageQuery()->value(iLanguageFieldID).toInt();
            tempRecord.strCurrency=languageQuery()->value(iLanguageFieldCurrency).toString();
            tempRecord.strName=languageQuery()->value(iLanguageFieldLName).toString();
            tempRecord.strPicPath=languageQuery()->value(iLanguageFieldFlagPath).toString();
            tempRecord.strTranslatorFilePath=languageQuery()->value(iLanguageFieldTranPath).toString();
            //languages().append(tempRecord);    // adds record to list
            m_listLanguages.append(tempRecord);    // adds record to list
        }
    }
    else
    {
        // query not active, error handler
        showString(tr("Query not active."));    // shows error
    }
}
 
void CLangSelectorMenu::createLangQuery()
{
    m_pLanguageQuery=new QSqlQuery(databaseConnector()->m_Database);    // creates language query
    Q_CHECK_PTR(m_pLanguageQuery);    // checks creation
}
 
void CLangSelectorMenu::setupMenu()
{
    //showString("m_listLanguages.size():"+QString::number(m_listLanguages.size()));    // debug
    for(int iIndex=0; iIndex<m_listLanguages.size(); iIndex++)
    {
        //showString("Pic path:"+m_listLanguages.at(iIndex).strPicPath);    // debug
        insertItem(QIcon(QPixmap(m_listLanguages.at(iIndex).strPicPath)),
                                 QString(m_listLanguages.at(iIndex).strName),
                                 this,
                                 SLOT(ignoreAction()));    // inserts flag
    }
}
 
void CLangSelectorMenu::ignoreAction()
{
    showString("Language changed.");    // debug
}
 
void CLangSelectorMenu::showString(const QString& strToShow)
{
    QMessageBox tempBox;
    tempBox.setText(strToShow);
    tempBox.exec();
}
 
void CLangSelectorMenu::languageChanged(int i)
{
    showString(QString::number(i));    // debug
}

/*
 * CLangSelectorMenu.cpp
 *
 *  Created on: 21.5.2009
 *      Author: markofr
 */

#include "CLangSelectorMenu.h"

CLangSelectorMenu::CLangSelectorMenu(const QString& strText,
                                     QWidget* pParent,
                                     const char* pName,
                                     quint16 iInnerRadius,
                                     quint16 iOuterRadius)
    : QtPieMenu(strText,
                pParent,
                pName,
                static_cast<uint>(iInnerRadius),
                static_cast<uint>(iOuterRadius))
{
    m_pDatabaseConnector=CDatabaseFoundation::getInstance(strdbType, strdbHost, strDatabaseName, strdbUserName, strdbPassword);
    Q_CHECK_PTR(m_pDatabaseConnector);    // checks creation

    setCurrentLanguage(1);    // test purposes
    createLangQuery();    // creates query object
    fetchLanguages();    // creates language list
    setupMenu();    // sets up menu
    connect(this,
            SIGNAL(activated(int)),
            this,
            SLOT(languageChanged(int)));
}

CLangSelectorMenu::~CLangSelectorMenu()
{
}

void CLangSelectorMenu::fetchLanguages()
{
    langStruct tempRecord;

    languageQuery()->exec("SELECT * FROM erosystem.language WHERE InUse=TRUE;");    // executes mysql query
    if(languageQuery()->isActive())
    {
        // query active, no errors
        while(languageQuery()->next())
        {
            // fetch records
            tempRecord.iLangId=languageQuery()->value(iLanguageFieldID).toInt();
            tempRecord.strCurrency=languageQuery()->value(iLanguageFieldCurrency).toString();
            tempRecord.strName=languageQuery()->value(iLanguageFieldLName).toString();
            tempRecord.strPicPath=languageQuery()->value(iLanguageFieldFlagPath).toString();
            tempRecord.strTranslatorFilePath=languageQuery()->value(iLanguageFieldTranPath).toString();
            //languages().append(tempRecord);    // adds record to list
            m_listLanguages.append(tempRecord);    // adds record to list
        }
    }
    else
    {
        // query not active, error handler
        showString(tr("Query not active."));    // shows error
    }
}

void CLangSelectorMenu::createLangQuery()
{
    m_pLanguageQuery=new QSqlQuery(databaseConnector()->m_Database);    // creates language query
    Q_CHECK_PTR(m_pLanguageQuery);    // checks creation
}

void CLangSelectorMenu::setupMenu()
{
    //showString("m_listLanguages.size():"+QString::number(m_listLanguages.size()));    // debug
    for(int iIndex=0; iIndex<m_listLanguages.size(); iIndex++)
    {
        //showString("Pic path:"+m_listLanguages.at(iIndex).strPicPath);    // debug
        insertItem(QIcon(QPixmap(m_listLanguages.at(iIndex).strPicPath)),
                                 QString(m_listLanguages.at(iIndex).strName),
                                 this,
                                 SLOT(ignoreAction()));    // inserts flag
    }
}

void CLangSelectorMenu::ignoreAction()
{
    showString("Language changed.");    // debug
}

void CLangSelectorMenu::showString(const QString& strToShow)
{
    QMessageBox tempBox;
    tempBox.setText(strToShow);
    tempBox.exec();
}

void CLangSelectorMenu::languageChanged(int i)
{
    showString(QString::number(i));    // debug
}

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