How to get QLabel from model class.

tokafr

Hello all!
I am a beginner in Qt MVC pattern. I try to create a list view which displays Icons on Labels. But I get empty items in my view. Here is what I write in my model class.
model.h

@
#define MODEL_H

#include <QAbstractListModel>
class QLabel;

class Model : public QAbstractListModel
{
Q_OBJECT
public:
Model(QObject *parent = 0);

bool setData(const QModelIndex &index, const QVariant &value, int role);
bool insertRows(int row, int count, const QModelIndex &parent);
void addRow(const QLabel item, QModelIndex &index);
QList<QLabel> getData()const;
int rowCount(const QModelIndex &parent) const;
QVariant data(const QModelIndex &index, int role) const;

private:
QList<QLabel*> dataList;

};

and model.cpp
#include <QtGui>
#include "model.h"
#include <iostream>
#include <QLabel>
#include <QTableWidgetItem>

Model::Model(QObject *parent):QAbstractListModel(parent)
{
}

QList<QLabel*> Model::getData()const
{
return dataList;
}

QVariant Model::data(const QModelIndex &index, int role) const
{
if(!index.isValid())
{
std::cout<<"errororor\n";
return QVariant();
}
if(index.row() < 0 || index.row() >= dataList.size())
{
return QVariant();
}

if(role == Qt::DisplayRole || role == Qt::EditRole)
{
std::cout<<"dadaaaaaa\n";
return qVariantFromValue(dataList.at(index.row()));
}

std::cout<<"eeerrtr\n";
return QVariant();
}

int Model::rowCount(const QModelIndex &parent) const
{
return dataList.size();
}

bool Model::insertRows(int row, int count, const QModelIndex &parent = QModelIndex())
{
if(parent.isValid())
{
return false;
}

beginInsertRows(QModelIndex(), row, row + count - 1);
for(int i = 0;i < count; ++i)
{
QPixmap pixmap("/home/omar/image.png");
//QIcon icon (pixmap);
QLabel *label = new QLabel("trtrtrtrtr");
label->setPixmap(pixmap);

 dataList.insert(row,label);

}

endInsertRows();
return true;
}

bool Model::setData(const QModelIndex &index, const QVariant &value, int role)
{
if(!index.isValid())
{
return false;
}

if(role == Qt::EditRole)
{

dataList.replace(index.row(),value.value<QLabel*>());//qvariant_cast<QIcon*>(value));
emit dataChanged(index,index);
return true;

}
return false;
}

 void Model::addRow(const QLabel *item, QModelIndex &index)

{
insertRows(rowCount(index),1,index);
//setData(index,item);
}

@
can help me please?

SGaist

Hi and welcome to devnet,

Don't create widgets like that in the model, it's not its role. Since you just want to show an icon, there's the Qt::IconRole for that. If you want customized output on your QListView then use a custom QStyledItemDelegate

Hope it helps

tokafr

Can you show me how? I tried it but no success. do I need Model class
at all?

kenchan

I wonder if this might help you...
It talks about using a Combo Box but I think you will get the idea.

"look here...":http://qt-project.org/wiki/Combo_Boxes_in_Item_Views

SGaist

First things first, what are you trying to achieve ?

A QStandardItemModel might be enough.

@ kenchan, it's not the same use-case

kenchan

OK sorry.
I just thought it might help illustrate the use of the QStyledItemDelegate

SGaist

Indeed, that's a good point. But from tokafr's problem description and questions it seems that first the MVC basics should first be cleared