QTableview 只显示横向线

#include <QApplication>

#include <QTableWidget>

#include <QPainter>

#include <QStyledItemDelegate>

#include <QHeaderView>

class QLineDelegate : public QStyledItemDelegate

{

public:

 QLineDelegate(QTableView* tableView);

protected:

 void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;

private:

 QPen pen;

 QTableView* view;

};

QLineDelegate::QLineDelegate(QTableView* tableView)

{

 int gridHint = tableView->style()->styleHint(QStyle::SH_Table_GridLineColor, new QStyleOptionViewItemV4());

 QColor gridColor = static_cast<QRgb>(gridHint);

 pen = QPen(gridColor, 0, tableView->gridStyle());

 view = tableView;

}

void QLineDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,const QModelIndex& index)const

{

 QStyledItemDelegate::paint(painter, option, index);

 QPen oldPen = painter->pen();

 painter->setPen(pen);

 //painter->drawLine(option.rect.topRight(), option.rect.bottomRight());

 painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());

 painter->setPen(oldPen);

}

class QLineTableWidget:public QTableWidget

{

public:

 QLineTableWidget();

};

QLineTableWidget::QLineTableWidget()

{

 setStyleSheet("QTableView::Item{selection-">);

 setStyleSheet("QTableView::Item{">);

 verticalHeader()->setVisible(false);

 horizontalHeader()->setVisible(true);

 setSelectionBehavior(QAbstractItemView::SelectRows);

 setSelectionMode(QAbstractItemView::SingleSelection);

 setEditTriggers(QTableView::NoEditTriggers);

 setColumnCount(3);

 setRowCount(4);

 setShowGrid(false);

 setItemDelegate(new QLineDelegate(this));

 setCurrentCell(-1,-1);

}

int main(int argc,char **argv)

{

 QApplication a(argc,argv);

 QLineTableWidget widget;

 widget.show();

 return a.exec();

}