Hi!
Both QOjects and osg::FieldContainers do a lot of things behind the scenes.
For starters they both do automatic deallocation (Qt deletes objects whith
its parents, osg uses refcounts). I would not inherit from both, it feels
like asking for trouble. Instead, I'd have separate classes and let them
reference each other. Something like this:
// TextBoxQObject.h
class TextBoxQObject : QObject
{
Q_OBJECT
private slots:
void aslot() {
mTextBox->aslot();
}
signals:
void asignal();
private:
TextBoxQObject(TextBox *box) {
mTextBox = box;
}
void emitASignal() {
emit asignal();
}
friend TextBox;
};
// TextBox.h
class TextBox : public TextBoxBase
{
TextBox() {
mQObject = new TextBoxQObject(this);
}
void aslot() {
// do stuff
mQObject->emitASignal();
}
TextBoxQObject *mQObject;
};
Best regards,
Johan Grafström
Dirk Reiners wrote:
Hi Antonio,
On Mon, 2005-11-21 at 16:38 +0100, [EMAIL PROTECTED] wrote:
Hi Dirk,
I create a new field container named TextBox. It is a new core
node to render opengl text. this core contain a new field named txtDoc.
This field is a QTextDocument of Qt 4.0.0 and it contain formatted
text. Of course, this TextBox inherit e TextBoxBase class:
class
OSG::TextBox : public TextBoxBase
{
.....
}
this is ok.
I not have any problem. My project work correctly.
then I have tried
to inherit from QObject and TextBoxBase in order to use the signal and
slot mechanism of qt. My code compile correctly bat fail when I try to
create a TextBox core.
class OSG::TextBox : public QObject, public
TextBoxBase
{
Q_OBJECT
public:
TextBox(QObject* parent=0);
TextBox(const TextBox &source, QObject* parent=0);
.......
}
Can
I help me?
I have to pass on this one. I don't have much experience with Qt, and
none with Qt4.
Anybody else?
Dirk
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