Question

在Qt中，我想在QT Symbian中自定义列表视图。所以为了自定义的目的，我为listview设置了委托。我也在处理油漆事件..问题是文字颜色。

当从列表视图中选择项目时，我没有获得默认文本颜色。

即下面的示例代码，我有两个字符串，即“item”（主要字符串）和“Test”（子字符串）

使用默认选择颜色绘制主字符串，但子字符串不会使用与主字符串相同的颜色绘制。

我认为我们需要处理选择并获得托盘颜色..我没有得到确切的方法。

请给我解决方案。

这是代码

class SettingDeligate : public QStyledItemDelegate
{
//        Q_OBJECT

    public:
        explicit SettingDeligate(QObject* parent = 0);
        virtual ~SettingDeligate();
        enum ItemDataRole {SubheaderTextRole = Qt::UserRole + 100};
        QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const;
        void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;
};

SettingDeligate::SettingDeligate(QObject* parent)
        : QStyledItemDelegate(parent)
{
}

SettingDeligate::~SettingDeligate()
{
}

QSize SettingDeligate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
        QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
        QString line1 = index.data(Qt::DisplayRole).toString();
        QString line2 = index.data(SubheaderTextRole).toString();

        int textW = qMax(option.fontMetrics.width(line1), option.fontMetrics.width(line2));
        //QSize iconSize = icon.actualSize(option.decorationSize);
        QSize iconSize(27,19);
        return QSize(qMax(textW, iconSize.width()) + 4,
                     iconSize.height() + 2 + option.fontMetrics.lineSpacing() * 2 + 4);    
}

void SettingDeligate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
      QStyledItemDelegate::paint(painter,option,index);
      QString headerText(qvariant_cast<QString>(index.model()->data(index, SubheaderTextRole)));
          QPoint point1 (option.rect.topLeft());
      painter->drawText(point1.x()+25,point1.y()+25,headerText);
}
int main(int argc, char *argv[])
{
        QApplication a(argc, argv);

        QListView *MylistView = new QListView();
        MylistView->setViewMode(QListView::ListMode);

        MylistView->setMovement(QListView::Free);
        MylistView->setItemDelegate(new (SettingDeligate));

        MylistView->setSelectionMode(QAbstractItemView::SingleSelection);


         QStandardItemModel *model = new QStandardItemModel();
         MylistView->setModel(model);


                 QStandardItem *item = new QStandardItem("item1");
                 item->setData("Test1", SettingDeligate::SubheaderTextRole);
                 model->appendRow(item);

            QStandardItem *item1 = new QStandardItem("item2");
                item1->setData("Test2", SettingDeligate::SubheaderTextRole);
            model->appendRow(item1);

            QStandardItem *item2 = new QStandardItem("item3");
            item2->setData("Test3", SettingDeligate::SubheaderTextRole);
            model->appendRow(item2);

                QDesktopWidget* desktopWidget = QApplication::desktop();
                //get client rect.
                QRect clientRect = desktopWidget->availableGeometry();

               MylistView->setGeometry(clientRect);
               MylistView->show();
               return a.exec();
}

请帮帮我

谢谢你

Answer 1

试试这个 -

void SettingDeligate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    QStyledItemDelegate::paint(painter,option,index);
    QString headerText(qvariant_cast<QString>(index.model()->data(index, SubheaderTextRole)));
    QPoint point1 (option.rect.topLeft());
    QPalette::ColorGroup colorGroup = QPalette::Normal;
    if(!option.state.testFlag(QStyle::State_Enabled))
        colorGroup = QPalette::Disabled;
    else if (!option.state.testFlag(QStyle::Active))
        colorGroup = QPalette::Inactive;

    QPalette::ColorRole colorRole = QPalette::Text;
    if(option.state.testFlag(QStyle::State_Selected))
        colorRole = QPalette::HighlightedText;
    if(option.status.testFlag(QStyle::State_Editing))
        colorRole = QPallete::Text;
    painter->setPen(option.palette.color(colorGroup, colorRole));
    painter->drawText(point1.x()+25,point1.y()+25,headerText);
}

colorgroup / colorrole映射的状态来自QCommonStyle :: DrawControl的文本绘图部分，用于CE_ItemViewItem元素。

Answer 2

对于symbian，这是Qt 4.6.2中的错误。

希望它可能会在下一个版本中得到解决..

... FYI

Check out here

代码中的错误

2 个答案: