Control qtreeview implementation

Method 1: qdirmodel is used for directory. qdirmodel is a model provided by QT for Tree display of file directories. The specific usage is as follows:

# Include <qtgui>

Int main (INT argc, char * argv [])
{
Qapplication app (argc, argv );
Qsplitter * splitter = new qsplitter;
Qdirmodel * model = new qdirmodel;
// Create data from the default directory
Qtreeview * tree = new qtreeview (splitter );
Tree-> setmodel (model );
Tree-> setrootindex (model-> index ("C ://"));
// Configure a view to display the data in the model. You only need to call setmodel () and pass the directory model as a parameter.
// Setrootindex () tells views which directory information is displayed. A model index is provided and
// Use the model index to retrieve data from the model.
// The index () function is unique to qdirmodel. You can use a directory as a parameter to obtain the required model index.
// Other code is displayed only in the window. It is enough to enter the program's event loop.
Qtextcodec: setcodecfortr (qtextcodec: codecforname ("GBK"); // Chinese display
Qtextcodec * codec = qtextcodec: codecforlocale ();
Qstring A = codec-> tounicode ("directory ");
Splitter-> setwindowtitle ();
Splitter-> show ();
Return app.exe C ();
}
The result is as follows:

Method 2: Set the tree structure.

"Treeview. H" File

# Include <qtgui>
Class Treeview: Public qtreeview
{
Public:
Treeview ();
Void iterateoveritems ();
Qlist <qstandarditem *> returntheitems ();
Void mousedoubleclickevent (qmouseevent * event );
PRIVATE:
Qstandarditemmodel * model;
};

"Treeview. cpp" File

# Include "Treeview. H"

Treeview: Treeview (): qtreeview ()
{
Qtextcodec: setcodecfortr (qtextcodec: codecforname ("GBK "));
Model = new qstandarditemmodel (4, 2 );
Model-> setheaderdata (0, QT: horizontal, TR ("service "));
Model-> setheaderdata (1, QT: horizontal, TR ("details "));
Qstandarditem * Item1 = new qstandarditem ("avahi-daemon ");
Item1-> seticon (qicon ("gparted.png "));
Qstandarditem * item2 = new qstandarditem ("Bluetooth ");
Item2-> seticon (qicon ("gparted.png "));
Qstandarditem * item3 = new qstandarditem ("crond ");
Item3-> seticon (qicon ("gparted.png "));
Qstandarditem * item4 = new qstandarditem ("Cups ");
Item4-> seticon (qicon ("gparted.png "));
Model-> setitem (0, 0, Item1 );
Model-> setitem (1, 0, item2 );
Model-> setitem (2, 0, item3 );
Model-> setitem (3, 0, item4 );
Qstandarditem * item5 = new qstandarditem ("th ");
Item4-> appendrow (item5 );

Qmodelindex parent;
For (INT I = 0; I <4; ++ I ){
Parent = model-> index (0, 0, parent );
Model-> insertrows (0, 1, parent );
Model-> insertcolumns (0, 1, parent );
Qmodelindex Index = model-> index (0, 0, parent );
Model-> setdata (index, I );
}
This-> setmodel (model );
}

Qlist <qstandarditem *> Treeview: returntheitems ()
{
Return Model-> finditems ("*", QT: matchwildcard | QT: matchrecursive );
}

Void Treeview: iterateoveritems ()
{
Qlist <qstandarditem *> List = returntheitems ();

Foreach (qstandarditem * item, list ){
Qdebug () <item-> text ();
}
}
Void Treeview: mousedoubleclickevent (qmouseevent * event)
{
If (Event-> button () = QT: leftbutton ){
Qmodelindex index0 = currentindex ();
Qdebug () <index0.data (). tostring ();
}
}

"Main. cpp" File

# Include <qtgui/qapplication>
# Include "Treeview. H"

Int main (INT argc, char * argv [])
{
Qapplication app (argc, argv );
Treeview view;
View. setedittriggers (q1_actitemview: noedittriggers );
View. header ()-> setresizemode (qheaderview: resizetocontents );
View. Resize (300,280 );
View. iterateoveritems ();
View. setwindowtitle (qobject: TR ("Linux Service Management "));
View. Show ();
Return app.exe C ();

}

Display:

The above are the two models of Treeview, with O (operator _ operator) O ~