[Qt-jambi-interest] Problem for displaying header and data

[Vincent Lebreil]

Any idea ? ...

BR

Vincent

On Tue, Jan 27, 2009 at 4:04 PM, Vincent Lebreil
<vincent.lebreil at gmail.com>wrote:

> Hi,
>
> I don't understand why nothing is displaying (neither header and data) if
> I'm using a QTreeView and my own model which inherits QAbstractItemModel.
>
> Btw if I use a QStandardItemModel instead, it works fine. Don't understand
> why ??
>
> Best Regards,
>
> Vincent
>
> Here's my code:
>
> ------------- 8< ----------------------------------------------------
> package org.workshop;
>
> import com.trolltech.qt.core.QObject;
> import com.trolltech.qt.core.Qt.Orientation;
> import com.trolltech.qt.gui.QApplication;
> import com.trolltech.qt.gui.QStandardItemModel;
> import com.trolltech.qt.gui.QWidget;
>
> public class MyTreeWidget extends QWidget {
>
>     Ui_MyTreeWidget ui = new Ui_MyTreeWidget();
>
>     public static void main(String[] args) {
>         QApplication.initialize(args);
>
>         MyTreeWidget testMyTreeWidget = new MyTreeWidget();
>         testMyTreeWidget.show();
>
>         QApplication.exec();
>     }
>
>     public MyTreeWidget() {
>         ui.setupUi(this);
>         init();
>     }
>
>     public MyTreeWidget(QWidget parent) {
>         super(parent);
>         ui.setupUi(this);
>         init();
>     }
>
>     private void init(){
>         ui.treeView.setModel(createMyStandardItemModel(this));
>         ui.treeView_2.setModel(createMyCustomItemModel(this));
>     }
>
>     private QStandardItemModel createMyStandardItemModel(QObject parent){
>         QStandardItemModel model = new QStandardItemModel(3,4,parent);
>         model.setHeaderData(0, Orientation.Horizontal, "A");
>         model.setHeaderData(1, Orientation.Horizontal, "B");
>         model.setHeaderData(2, Orientation.Horizontal, "C");
>         model.setHeaderData(3, Orientation.Horizontal, "D");
>         model.setData(0, 0, "A1");
>         model.setData(0, 1, "B1");
>         model.setData(0, 2, "C1");
>         model.setData(0, 3, "D1");
>         model.setData(1, 0, "A2");
>         model.setData(1, 1, "B2");
>         model.setData(1, 2, "C2");
>         model.setData(1, 3, "D2");
>         model.setData(2, 0, "A3");
>         model.setData(2, 1, "B3");
>         model.setData(2, 2, "C3");
>         model.setData(2, 3, "D3");
>         return model;
>     }
>
>     private MyCustomItemModel createMyCustomItemModel(QObject parent){
>         MyCustomItemModel model = new MyCustomItemModel(parent);
>
>         return model;
>     }
> }
>
> ------------- 8< ----------------------------------------------------
>
>
> ------------- 8< ----------------------------------------------------
> package org.workshop;
>
> import java.util.ArrayList;
> import java.util.List;
>
> import com.trolltech.qt.core.QAbstractItemModel;
> import com.trolltech.qt.core.QModelIndex;
> import com.trolltech.qt.core.QObject;
> import com.trolltech.qt.core.Qt.ItemFlag;
> import com.trolltech.qt.core.Qt.ItemFlags;
> import com.trolltech.qt.core.Qt.Orientation;
>
> public class MyCustomItemModel extends QAbstractItemModel {
>
>     private List<String[]> datas = new ArrayList<String[]>();
>
>     public MyCustomItemModel(QObject parent){
>         super(parent);
>         datas.add(new String[]{"A1", "B1", "C1", "D1"});
>         datas.add(new String[]{"A2", "B2", "C2", "D2"});
>         datas.add(new String[]{"A3", "B3", "C3", "D3"});
>     }
>
>     @Override
>     public Object headerData(int section, Orientation orientation, int
> role) {
>         String header = null;
>         switch (section) {
>         case 0: header = "A"; break;
>         case 1: header = "B"; break;
>         case 2: header = "C"; break;
>         case 3: header = "D"; break;
>         }
>         System.out.println("header: " + header);
>         return header;
>     }
>
>
>     @Override
>     public int columnCount(QModelIndex parent) {
>         return 4;
>     }
>
>     @Override
>     public Object data(QModelIndex index, int role) {
>         System.out.println("index: " + index);
>         int row = index.row();
>         int column = index.column();
>         if (index != null && row >= 0 && row < datas.size()) {
>             String[] rowData = datas.get(row);
>             if (column >= 0 && column < columnCount()){
>                 System.out.println("data: " + rowData[column]);
>                 return rowData[column];
>             }
>         }
>         return null;
>     }
>
>     @Override
>     public QModelIndex index(int row, int column, QModelIndex parent) {
>         if (parent == null){
>             return createIndex(row, column, 1);
>         }
>         return null;
>     }
>
>     @Override
>     public QModelIndex parent(QModelIndex child) {
>         return null;
>     }
>
>     @Override
>     public int rowCount(QModelIndex parent) {
>         return datas.size();
>     }
>
>     @Override
>     public ItemFlags flags(QModelIndex index) {
>         if (index == null) {
>             return new ItemFlags(ItemFlag.ItemIsEnabled);
>         }
>         ItemFlags flags = super.flags(index);
>         flags.set(ItemFlag.ItemIsEditable);
>         return flags;
>     }
>
> }
> ------------- 8< ----------------------------------------------------
>
> ------------- 8< ----------------------------------------------------
>
> /********************************************************************************
> ** Form generated from reading ui file 'MyTreeWidget.jui'
> **
> ** Created: mar. 27. janv. 15:33:57 2009
> **      by: Qt User Interface Compiler version 4.4.2
> **
> ** WARNING! All changes made in this file will be lost when recompiling ui
> file!
>
> ********************************************************************************/
>
> package org.workshop;
>
> import com.trolltech.qt.core.*;
> import com.trolltech.qt.gui.*;
>
> public class Ui_MyTreeWidget
> {
>     public QTreeView treeView;
>     public QTreeView treeView_2;
>
>     public Ui_MyTreeWidget() { super(); }
>
>     public void setupUi(QWidget MyTreeWidget)
>     {
>         MyTreeWidget.setObjectName("MyTreeWidget");
>         MyTreeWidget.resize(new QSize(724,
> 387).expandedTo(MyTreeWidget.minimumSizeHint()));
>         treeView = new QTreeView(MyTreeWidget);
>         treeView.setObjectName("treeView");
>         treeView.setGeometry(new QRect(50, 40, 256, 192));
>
> treeView.setFocusPolicy(com.trolltech.qt.core.Qt.FocusPolicy.WheelFocus);
>         treeView_2 = new QTreeView(MyTreeWidget);
>         treeView_2.setObjectName("treeView_2");
>         treeView_2.setGeometry(new QRect(400, 40, 256, 192));
>
> treeView_2.setFocusPolicy(com.trolltech.qt.core.Qt.FocusPolicy.WheelFocus);
>         treeView_2.setRootIsDecorated(false);
>         treeView_2.setItemsExpandable(false);
>         retranslateUi(MyTreeWidget);
>
>         MyTreeWidget.connectSlotsByName();
>     } // setupUi
>
>     void retranslateUi(QWidget MyTreeWidget)
>     {
>
> MyTreeWidget.setWindowTitle(com.trolltech.qt.core.QCoreApplication.translate("MyTreeWidget",
> "Form"));
>     } // retranslateUi
>
> }
> ------------- 8< ----------------------------------------------------
>
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