Problem in displaying images on the clicked(qmodelindex) SIGNAL

[kamlmish]

Hi
I have a slot function "displayitem(const QModelIndex& index)" to display the images .

void eBeamTree::displayitem(const QModelIndex& index)
{
    QString path = mod->filePath(index);
    QDir dir;
    dir.setPath(path);
    QImage thumb, tmp;
    int sizeW = 20;
    int sizeH = 20;
    QStringList listfiles = dir.entryList(QStringList()<<"*.png",QDir::Files);
    for(int i=0;i<listfiles.count();i++)
    {
        QString filename = listfiles.at(i);
        QString filepath = dir.absoluteFilePath(filename);
        bool x = tmp.load(filepath);
        if(x == true)
        {
            thumb = (tmp.scaled( 120, 120 ).scaled( sizeW, sizeH, Qt::IgnoreAspectRatio )); //two passes
            frame->model->setData(frame->model->index( i, 0 ), thumb, Qt::DecorationRole );
            frame->model->setData(frame->model->index(i,1),filename,Qt::DisplayRole);
        }
 
    }
    frame->treeview->setModel(mod);
    frame->treeview->setHeaderHidden(true);
    frame->treeview->show();
 
}

void eBeamTree::displayitem(const QModelIndex& index)
{
    QString path = mod->filePath(index);
    QDir dir;
    dir.setPath(path);
    QImage thumb, tmp;
    int sizeW = 20;
    int sizeH = 20;
    QStringList listfiles = dir.entryList(QStringList()<<"*.png",QDir::Files);
    for(int i=0;i<listfiles.count();i++)
    {
        QString filename = listfiles.at(i);
        QString filepath = dir.absoluteFilePath(filename);
        bool x = tmp.load(filepath);
        if(x == true)
        {
            thumb = (tmp.scaled( 120, 120 ).scaled( sizeW, sizeH, Qt::IgnoreAspectRatio )); //two passes
            frame->model->setData(frame->model->index( i, 0 ), thumb, Qt::DecorationRole );
            frame->model->setData(frame->model->index(i,1),filename,Qt::DisplayRole);
        }

    }
    frame->treeview->setModel(mod);
    frame->treeview->setHeaderHidden(true);
    frame->treeview->show();

}

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Declaration of the class eBeamTree and FrameDisplay is provided

class eBeamTree: public QTreeWidget
{
    Q_OBJECT
public:
    eBeamTree(QWidget* parent=0);
    ~eBeamTree();
 
public:
    void populate();
    void DockSize();
    void FloatSize();
 
public slots:
    void displayitem(const QModelIndex& index);
 
public:
    QDirModel* mod;
    QTreeView* view;
    QDir eBeamDir;
    FrameDisplay* frame;
 
};

class eBeamTree: public QTreeWidget
{
    Q_OBJECT
public:
    eBeamTree(QWidget* parent=0);
    ~eBeamTree();

public:
    void populate();
    void DockSize();
    void FloatSize();

public slots:
    void displayitem(const QModelIndex& index);

public:
    QDirModel* mod;
    QTreeView* view;
    QDir eBeamDir;
    FrameDisplay* frame;

};

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class FrameDisplay: public QListWidget
{
    Q_OBJECT
public:
    FrameDisplay(QWidget* parent = 0);
    ~FrameDisplay();
public:
    void DockSize();
    void FloatSize();
 
public:
    QDirModel *model;
    QTreeView* treeview;
 
};

class FrameDisplay: public QListWidget
{
    Q_OBJECT
public:
    FrameDisplay(QWidget* parent = 0);
    ~FrameDisplay();
public:
    void DockSize();
    void FloatSize();

public:
    QDirModel *model;
    QTreeView* treeview;

};

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I am able to debug the code and check the list of files and filenames , but when running the app, images do not display .
As per the image, the basic idea is when a user clicks any item on the tree (left side)
images under that particular child item should get displayed

[franz]

According to the documentation, data for the Qt:ecorationRole should be a QColor, QIcon or QPixmap. You should probably pass the image's pixmap instead of the image itself.

[kamlmish]

I am able to display the images , but issue now is that
I need to align the display of images accoridng to the size of the frame.
If I use QPixmap, QIcon or QColor, the loading of images takes lot of time as compared to QImage