How to get QLabel from model class.
-
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? -
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
-
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
-
First things first, what are you trying to achieve ?
A QStandardItemModel might be enough.
@ kenchan, it's not the same use-case
-
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
