QMap error

Hi everyone,

I created a map

Code:

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QMap<QString, VelocityModel> vmMap;

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I try to do this, to retrieve a VelocityModel object.

Code:

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vmMap.value(key);

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but I get this error:

c:/Qt/4.4.3/include/QtCore/../../src/corelib/tools/qmap.h:438: error: no matching function for call to `VelocityModel::VelocityModel()'
velocitymodel.h:7: note: candidates are: VelocityModel::VelocityModel(const VelocityModel&)
velocitymodel.h:10: note: VelocityModel::VelocityModel(QString, QString)

The only constructor I have is this one:

Code:

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VelocityModel::VelocityModel (QString modelName, QString modelFile )

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Code:

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#include <QtGui>
#include "velocitymodel.h"
 
VelocityModel::VelocityModel (QString modelName, QString modelFile ) : mModelName( modelName ), mModelFile( modelFile ) {}
QString VelocityModel::modelName() const { return mModelName; }
QString VelocityModel::modelFile() const { return mModelFile; }

---

Code:

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#ifndef _VELOCITYMODEL_H_
#define _VELOCITYMODEL_H_
 
#include <QString>
#include <QStringList>
 
class VelocityModel {
 
public:
    VelocityModel ( QString modelName, QString modelFile );
    QString modelName() const;
    QString modelFile() const;
 
private:
    QString mModelName;   
    QString mModelFile;
    QStringList velocities;
};
 
#endif /* _VELOCITYMODEL_H_ */

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Is there something I need to declare in my velocitymodel class, in order to retrieve the object?

you need to define a default constructor in your class.

value() method is from iterator, to get from map, change to:
vmMap.value(key) => vmMap[ key ]

Quote:

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Originally Posted by lni

value() method is from iterator, to get from map, change to:
vmMap.value(key) => vmMap[ key ]

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Sorry, I was wrong, just did as Sheng pointed out

I can't believe that was it O_o and empty default constructor :\

Thank you all.