我想制作一个自定义列表视图,因为我将动态添加项目,我已经编写了相同的代码,但这给了我一些问题,
- 代码编译正常,但它会给出一些链接器错误,
- 我通过保留不同的头文件尝试了相同的代码,它运行良好,但我并没有控制我的委托类。
请你能建议错误可能是什么?
#include <QtGui>
#include <QApplication>
#include <QtGui/QMainWindow>
class ItemDeligate:public QStyledItemDelegate
{
public:
ItemDeligate(QObject *parent = 0):QStyledItemDelegate(parent)
{
}
~ItemDeligate()
{
}
public:
enum ItemDataRole { SubTextRole = Qt::UserRole + 100 };
QSize sizeHint( const QStyleOptionViewItem& option,
const QModelIndex& index ) const;
void paint( QPainter* painter,
const QStyleOptionViewItem& option,
const QModelIndex& index ) const;
};
QSize ItemDeligate::sizeHint( const QStyleOptionViewItem& option,
const QModelIndex &index) const
{
// here i know implimentation
}
void ItemDeligate::paint( QPainter* p,
const QStyleOptionViewItem& option,
const QModelIndex& 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<QStandardItem *> 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->geometry();
MylistView->setMinimumSize( QSize( clientRect.width() - 7,
clientRect.height() - 1 ) );
MylistView->setViewMode(QListView::ListMode);
MylistView->setMovement(QListView::Free);
MylistView->setItemDelegate(new ItemDeligate(MylistView));
MylistView->setSelectionMode(QAbstractItemView::SingleSelection);
bool val = GreenPixmap.load(":/new/prefix1/temp/test.png");
ListModel = new QStandardItemModel();
ListModel->appendColumn(ItemList);
MylistView->setModel(ListModel);
Listlayout.addWidget(MylistView);
Listlayout.addWidget(MylistView);
this->setLayout(&Listlayout);
AddItemMenu = new QAction("Add",this);
menuBar()->addAction(AddItemMenu);
val = connect(AddItemMenu,SIGNAL(triggered()),this,SLOT(addItem()));
}
void Test::addItem()
{
QStandardItem *Items = new QStandardItem(QIcon(GreenPixmap),"Avatar");
Items->setData("WAKE UP",ItemDeligate::SubTextRole);
ItemList.append(Items);
ListModel->appendColumn(ItemList);
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Test test;
test.showMaximized();
test.showMaximized();
return a.exec();
}
错误导致工具中止。
mwldsym2.exe: 未定义符号: 'void * Test::qt_metacast(char const *) (?qt_metacast@Test@@UAEPAXPBD@Z)' mwldsym2.exe: 引用自 'const Test::vftable' (??_7Test@@ main.o mwldsym2.exe 中的 6B@~)':未定义符号:'struct QMetaObject const * Test::metaObject(void) const (?metaObject@Test@@UBEPBUQMetaObject@@XZ)' mwldsym2.exe:引用自 'const测试::`vftable' (??_7Test@@6B@~)' 在 main.o