Qt line number in text editor

[Nyx]

Hello;

I have been looking for my issue for somes weeks but I didn' achieve to solve it.

I'm trying to put line numbers on the left side of my QSubWindow but I have a compilation error using the Qt exemple (http://doc.qt.nokia.com/4.5/widgets-codeeditor.html): 'QWidget' is an ambiguous base of 'MainFen'

I don't understand the error.
Could you help me please?

[Lykurg]

MainFen has which base classes? Please show some code that we better can see, what you are doing wrong.

[Nyx]

oh sorry :


class MainFen : public QMainWindow, public QPlainTextEdit, private Ui::MainFen
{
Q_OBJECT

public:

MainFen(QWidget *parent = 0);
~MainFen();

void lineNumberAreaPaintEvent(QPaintEvent *event);
int lineNumberAreaWidth();

private slots:

void updateLineNumberAreaWidth(int newBlockCount);
void updateLineNumberArea(const QRect &, int);

protected:
void resizeEvent(QResizeEvent *event);

private:

QMdiArea * centralZone;
QMdiSubWindow * Win;
QPlainTextEdit * textEdit;

QWidget * lineNumberArea;

};

So MainFen has public QMainWindow, public QPlainTextEdit, private Ui::MainFen base classes.

and that's the LineNumberArea class from Qt exemple:


class LineNumberArea : public QMdiSubWindow
{
Q_OBJECT

public:

LineNumberArea(MainFen * main) : QMdiSubWindow(main)
{
mainfen = main;
}

QSize sizeHint() const
{
return QSize(mainfen->lineNumberAreaWidth(), 0);
}


protected:

void paintEvent(QPaintEvent *event)
{
mainfen->lineNumberAreaPaintEvent(event);
}


private:

MainFen * mainfen;

};

[Ginsengelf]

Hi, MainFen is derived of two QWidget based Widgets: QMainWindow and QPlainTextEdit. I am not sure if that is allowed at all.

Ginsengelf

[Nyx]

Yes this is not allowed but how should I do?

[Ginsengelf]

Just derive from QMainWindow only and use QPlainTextEdit as a member (you already have the pointer).

Ginsengelf

[Nyx]

If I only inherit from QMainWindow I have other errors other errors (http://img291.imageshack.us/i/errorkw.png/)