如何在QCompleter的项目之间画一条线作为分隔符？

2 回答

• 0

  使用新类型创建自定义模型，并在委托绘制中为窗口小部件创建自定义委托，您可以在新类型中绘制任何内容并允许在父级中绘制默认类型... see this example for combobox

  回复于 2024-04-26T15:07:41+08:00
• 0

  好的，所以我试图提供更多的细节而不是我最初的提示，因为我认为这就足够了 . 我担心人们会开始进一步询问，所以这就是：

  completerseparatordelegate.h

  #include <QItemDelegate>
  #include <QSize>
  #include <QModelIndex>
  #include <QStyleOptionViewItem>
  
  class CompleterSeparatorDelegate : public QItemDelegate
  {
      Q_OBJECT
  
  public:
      CompleterSeparatorDelegate(QObject *parent = 0);
      ~CompleterSeparatorDelegate();
  
  protected:    
      void paint(QPainter *painter, const QStyleOptionViewItem &option,
                 const QModelIndex &index) const;
      QSize sizeHint(const QStyleOptionViewItem &option,
                     const QModelIndex &index) const;
  };
  

  completerseparatordelegate.cpp

  #include "completerseparatordelegate.h"
  
  #include <QPainter>
  #include <QString>
  
  CompleterSeparatorDelegate::CompleterSeparatorDelegate(QObject *parent)
      : QItemDelegate(parent)
  {
  }
  
  CompleterSeparatorDelegate::~CompleterSeparatorDelegate()
  {
  }
  
  void CompleterSeparatorDelegate::paint(QPainter *painter,
                            const QStyleOptionViewItem &option,
                            const QModelIndex &index) const
  {
      if(index.data(Qt::AccessibleDescriptionRole).toString() == QLatin1String("separator"))
      {
          painter->setPen(Qt::red);
          painter->drawLine(option.rect.left(), option.rect.center().y(), option.rect.right(), option.rect.center().y());
      } else {
          QItemDelegate::paint(painter, option, index);
      }
  }
  
  QSize CompleterSeparatorDelegate::sizeHint(const QStyleOptionViewItem &option,
                                             const QModelIndex &index) const
  {
      QString type = index.data(Qt::AccessibleDescriptionRole).toString();
      if(type == QLatin1String("separator"))
          return QSize(0, 2);
      return QItemDelegate::sizeHint( option, index );
  }
  

  mainwindow.cpp

  #include "completerseparatordelegate.h"
  
  ...
  listView->setItemDelegate(new CompleterSeparatorDelegate);
  completer->setPopup(listView);
  ...
  

  我没有尝试编译这段代码，因为我只是将其作为原始文本动态编写，但主要思想基本上来自here并进行了少量改编 .

  回复于 2024-04-26T15:07:41+08:00