QLayoutPrivate issue

I am trying to extend the Qt example FlowLayout to include the insertWidgetAt(int position, QWidget* w) method.

I wrote (borrowed the code from QBoxLayout):

Code:

---

//public:
void FlowLayout::insertWidgetAt(int pos,QWidget *w){
     addChildWidget(w);
     insertItem(pos,QLayoutPrivate::createWidgetItem(this, w)); //***
     invalidate();
}
 
//private:
void FlowLayout::insertItem(int pos,QLayoutItem *item){
     itemList.insert(pos,item);
}

---

At the line marked with //***, gcc gives "incomplete type `QLayoutPrivate' used in nested name specifier" error. What should I do to implement the method?

use QWidgetItem insted of QLayoutPrivate::createWidgetItem.
i.e.

Code:

---

insertItem(pos,QWidgetItem(w));

---

I resolved this issue by

Code:

---

#include <QtGui/private/qlayout_p.h>

---

If this will not work, I'll try your solution.

it is bad idea to use Qt's internal code.

Indeed! Thank you.

I'm trying to do the exact same thing. This thread is rather old, but I would be very happy to know how you solved this. I'm struggling with getting the suggestion from "spirit" to work.

You also need to store the widget using addChildWidget(). So the additional functions should look like the following:

Code:

---

void FlowLayout::insertItem(int index, QLayoutItem *item)
{
    itemList.insert(index, item);
}
 
void FlowLayout::insertWidget(int index, QWidget *widget)
{
    addChildWidget(widget);
    QWidgetItem *item = new QWidgetItem(widget);
    insertItem(index, item);
}

---

P.S. this works for me.