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POWhere is the mistake in my code?
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  1. POWhere is the mistake in my code?
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    copied!<p>I want to make a customized list view, in that I will add items dynamically, I have written code for the same, but it's giving me some problems,</p> <ol> <li>code is compiling fine but it will give some linker error,</li> <li>I tried the same code by keeping different header files, it runs well, but i am not getting control to my delegate class only.</li> </ol> <p>Please can you suggest what the mistake(s) might be?</p> <pre><code>#include &lt;QtGui&gt; #include &lt;QApplication&gt; #include &lt;QtGui/QMainWindow&gt; class ItemDeligate:public QStyledItemDelegate { public: ItemDeligate(QObject *parent = 0):QStyledItemDelegate(parent) { } ~ItemDeligate() { } public: enum ItemDataRole { SubTextRole = Qt::UserRole + 100 }; QSize sizeHint( const QStyleOptionViewItem&amp; option, const QModelIndex&amp; index ) const; void paint( QPainter* painter, const QStyleOptionViewItem&amp; option, const QModelIndex&amp; index ) const; }; QSize ItemDeligate::sizeHint( const QStyleOptionViewItem&amp; option, const QModelIndex &amp;index) const { // here i know implimentation } void ItemDeligate::paint( QPainter* p, const QStyleOptionViewItem&amp; option, const QModelIndex&amp; index ) const { // here i know the implimentation QStyledItemDelegate::paint(p,option,index); } class Test : public QMainWindow { Q_OBJECT public: Test(QWidget *parent = 0); ~Test() { } QPixmap GreenPixmap; QList&lt;QStandardItem *&gt; ItemList; QStandardItemModel *ListModel; QVBoxLayout Listlayout; QListView *MylistView; QAction *AddItemMenu; public slots: void addItem(); }; Test::Test(QWidget *parent) : QMainWindow(parent) { MylistView = new QListView(); QDesktopWidget* desktopWidget = QApplication::desktop(); QRect clientRect = desktopWidget-&gt;geometry(); MylistView-&gt;setMinimumSize( QSize( clientRect.width() - 7, clientRect.height() - 1 ) ); MylistView-&gt;setViewMode(QListView::ListMode); MylistView-&gt;setMovement(QListView::Free); MylistView-&gt;setItemDelegate(new ItemDeligate(MylistView)); MylistView-&gt;setSelectionMode(QAbstractItemView::SingleSelection); bool val = GreenPixmap.load(":/new/prefix1/temp/test.png"); ListModel = new QStandardItemModel(); ListModel-&gt;appendColumn(ItemList); MylistView-&gt;setModel(ListModel); Listlayout.addWidget(MylistView); Listlayout.addWidget(MylistView); this-&gt;setLayout(&amp;Listlayout); AddItemMenu = new QAction("Add",this); menuBar()-&gt;addAction(AddItemMenu); val = connect(AddItemMenu,SIGNAL(triggered()),this,SLOT(addItem())); } void Test::addItem() { QStandardItem *Items = new QStandardItem(QIcon(GreenPixmap),"Avatar"); Items-&gt;setData("WAKE UP",ItemDeligate::SubTextRole); ItemList.append(Items); ListModel-&gt;appendColumn(ItemList); } int main(int argc, char *argv[]) { QApplication a(argc, argv); Test test; test.showMaximized(); test.showMaximized(); return a.exec(); } </code></pre> <p>Errors caused tool to abort.</p> <blockquote> <p>mwldsym2.exe: Undefined symbol: 'void * Test::qt_metacast(char const *) (?qt_metacast@Test@@UAEPAXPBD@Z)' mwldsym2.exe: referenced from 'const Test::vftable' (??_7Test@@6B@~)' in main.o mwldsym2.exe: Undefined symbol: 'struct QMetaObject const * Test::metaObject(void) const (?metaObject@Test@@UBEPBUQMetaObject@@XZ)' mwldsym2.exe: referenced from 'const Test::`vftable' (??_7Test@@6B@~)' in main.o</p> </blockquote>
 

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