QLedMatrix Sample Program

[qt52]

Hello Everyone,

I would like to try this QLedMatrix sample code ( http://qt-apps.org/content/show.php?action=content&content=101193 ) but when i compile it, it show 2 error message as bellow:
cannot find -lqledmatrix
collect2: ld return 1 exit status

In the .pro file last line show
LIBS +- -lqledmatrix
I think qledmatrix library is missing. May i know this library is .dll format? In QLedMatrix-0.6 folder i can't find any .dll file. Is it we have to use the sample code to generate the library?

Please kindly advice..Thanks..

[stukdev]

1. You have to build the library to generate the dll
2. I tried in past that project and its simply the way to clear LCD effect (create a grid in front of the string) but have some limitation.

[qt52]

Hello Stuk,

Thanks for your reply.

I'm not sure i'm doing a right way not... following is the library file that i try to generate,

.pro file
@#-------------------------------------------------

Project created by QtCreator 2013-02-07T16:14:13

#-------------------------------------------------

QT -= gui

TARGET = qledmatrix
TEMPLATE = lib

DEFINES += QLEDMATRIX_LIBRARY

SOURCES += qledmatrix.cpp

HEADERS += qledmatrix.h
qledmatrix_global.h

symbian {
MMP_RULES += EXPORTUNFROZEN
TARGET.UID3 = 0xEE658E29
TARGET.CAPABILITY =
TARGET.EPOCALLOWDLLDATA = 1
addFiles.sources = qledmatrix.dll
addFiles.path = !:/sys/bin
DEPLOYMENT += addFiles
}

unix:!symbian {
maemo5 {
target.path = /opt/usr/lib
} else {
target.path = /usr/lib
}
INSTALLS += target
}
@

qledmatrix.h file
@#ifndef QLEDMATRIX_H
#define QLEDMATRIX_H

#include <QtGui/qwidget.h>
#include <QtDesigner/QDesignerExportWidget>

class QLedMatrixPrivate;
class QDESIGNER_WIDGET_EXPORT QLedMatrix: public QWidget
{
Q_OBJECT
Q_ENUMS(LEDColor)
Q_PROPERTY(QColor backgroundColor READ backgroundColor WRITE setBackgroundColor)
Q_PROPERTY(Qt::BGMode backgroundMode READ backgroundMode WRITE setBackgroundMode)
Q_PROPERTY(QColor darkLedColor READ darkLedColor WRITE setDarkLedColor)
Q_PROPERTY(int rows READ rowCount WRITE setRowCount)
Q_PROPERTY(int columns READ columnCount WRITE setColumnCount)

public:

    QLedMatrix(QWidget* parent = 0);
    virtual ~QLedMatrix();

    enum LEDColor
    {
        NoColor   = 0xFF222222,

        Red       = 0xFFFF0000,
        Green     = 0xFF00FF00,
        Blue      = 0xFF0000FF,

        White     = 0xFFFFFFFF,
        Orange    = 0xFFFF8800,
        OrangeRed = 0xFFFF2200,
        Yellow    = 0xFFFFFF00
    };

    void clear();

    QColor backgroundColor() const;
    void setBackgroundColor(const QColor& color);

    Qt::BGMode backgroundMode() const;
    void setBackgroundMode(Qt::BGMode mode);

    QColor darkLedColor() const;
    void setDarkLedColor(const QColor& color);

    QRgb colorAt(int row, int col) const;
    void setColorAt(int row, int col, QRgb rgb);

    int rowCount() const;
    void setRowCount(int rows);

    int columnCount() const;
    void setColumnCount(int columns);

    QSize sizeHint() const;

protected:
    QLedMatrixPrivate* const d_ptr;
    void paintEvent(QPaintEvent* event);

private:
    Q_DISABLE_COPY(QLedMatrix)
    Q_DECLARE_PRIVATE(QLedMatrix)

};

#endif // QLEDMATRIX_H
@

qledmatrix_global.h file
@
#ifndef QLEDMATRIX_GLOBAL_H
#define QLEDMATRIX_GLOBAL_H

#include <QtCore/qglobal.h>

#if defined(QLEDMATRIX_LIBRARY)

define QLEDMATRIXSHARED_EXPORT Q_DECL_EXPORT

#else

define QLEDMATRIXSHARED_EXPORT Q_DECL_IMPORT

#endif

#endif // QLEDMATRIX_GLOBAL_H@

qledmatrix.cpp file
@#include "qledmatrix.h"

#include <QtGui/qpainter.h>
//#include <qpainter.h>

/**

• \internal
  */
  class QLedMatrixPrivate
  {
  Q_DECLARE_PUBLIC(QLedMatrix)

  public:
  bool isValid(int row, int col) const;
  void setColorAt(int row, int col, QRgb rgb, bool doUpdate);
  .....
  ..
  @

After i compile, it generate a lot of warning and one error ( definition of static data member 'QLedMatrix::staticMetaObjectExtraData' of dllimport'd class).

Have you across this error message?