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组合框内的 QIcon

发布于 2024-08-23 23:51:44 字数 118 浏览 7 评论 0原文

我想在 QComboBox 中的条目上包含“删除”图标，但我在捕获鼠标按下事件时遇到问题。我尝试在组合框中捕获它，并且尝试重新实现 QIcon 类以捕获那里的鼠标按下。没有骰子。有人知道该怎么做吗？

-D

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番薯 2024-08-30 23:51:44

我编写的代码有点像这样，我想将树视图放在组合框中，并且在单击树上的复选框时需要执行操作。我最终做的是在组合框上安装一个事件过滤器来拦截鼠标单击，找出鼠标单击发生的位置，然后采取行动。也许你可以用你的图标做同样的事情。这是代码：

bool TreeComboBox::eventFilter(QObject* object, QEvent* event)
{
  if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonRelease)
  {
    QMouseEvent* m = static_cast<QMouseEvent*>(event); 
    QModelIndex index = view()->indexAt(m->pos());
    QRect vrect = view()->visualRect(index);

    if(event->type() == QEvent::MouseButtonPress  && 
      (model()->flags(index) & Qt::ItemIsUserCheckable) &&
      vrect.contains(m->pos()))
    {
// Your action here
      ToggleItem(index);
      UpdateSelectionString(); 
    }
    if (view()->rect().contains(m->pos()))
      skipNextHide = true;
  }
  return QComboBox::eventFilter(object, event);
}

I've written code a bit like this, where I wanted to put a tree view inside a combo box and I needed to take an action when the check box on the tree was clicked. What I ended up doing was installing an event filter on the combo box to intercept mouse clicks, figure out where the mouse click was happening, and then take an action. Probably you can do the same kind of thing with your icon. Here is the code:

bool TreeComboBox::eventFilter(QObject* object, QEvent* event)
{
  if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonRelease)
  {
    QMouseEvent* m = static_cast<QMouseEvent*>(event); 
    QModelIndex index = view()->indexAt(m->pos());
    QRect vrect = view()->visualRect(index);

    if(event->type() == QEvent::MouseButtonPress  && 
      (model()->flags(index) & Qt::ItemIsUserCheckable) &&
      vrect.contains(m->pos()))
    {
// Your action here
      ToggleItem(index);
      UpdateSelectionString(); 
    }
    if (view()->rect().contains(m->pos()))
      skipNextHide = true;
  }
  return QComboBox::eventFilter(object, event);
}

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