具有自定义项目和自定义项目小部件的QListView/QListWidget

问题描述

我正在编写PyQt应用程序，但在创建自定义列表视图时遇到了一些麻烦.我希望列表包含任意小部件(特别是一个自定义小部件).我该怎么办?

I'm writing a PyQt application and am having some trouble creating a custom list view. I'd like the list to contain arbitrary widgets (one custom widget in particular). How would I go about this?

似乎替代方法是创建一个包装在滚动条中的表或网格视图.但是，我希望能够利用模型/视图方法以及嵌套(树视图)支持内置句柄的优势.

It seems that the alternative would be to create a table or grid view wrapped in a scrollbar. However, I'd like to be able to take advantage of the model/view approach as well as the nesting (tree-view) support the built-ins handle.

为澄清起见，自定义窗口小部件是交互式的(包含按钮)，因此该解决方案需要的不仅仅是绘制窗口小部件.

To clarify, the custom widgets are interactive (contain buttons), so the solution requires more than painting a widget.

推荐答案

我认为您需要继承 QItemDelegate .

此代码摘自Qt的示例(torrent应用程序).

This code is taken from Qt's examples, the torrent application.

class TorrentViewDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    inline TorrentViewDelegate(MainWindow *mainWindow) : QItemDelegate(mainWindow) {}

    inline void paint(QPainter *painter, const QStyleOptionViewItem &option,
                      const QModelIndex &index ) const
    {
        if (index.column() != 2) {
            QItemDelegate::paint(painter, option, index);
            return;
        }

        // Set up a QStyleOptionProgressBar to precisely mimic the
        // environment of a progress bar.
        QStyleOptionProgressBar progressBarOption;
        progressBarOption.state = QStyle::State_Enabled;
        progressBarOption.direction = QApplication::layoutDirection();
        progressBarOption.rect = option.rect;
        progressBarOption.fontMetrics = QApplication::fontMetrics();
        progressBarOption.minimum = 0;
        progressBarOption.maximum = 100;
        progressBarOption.textAlignment = Qt::AlignCenter;
        progressBarOption.textVisible = true;

        // Set the progress and text values of the style option.
        int progress = qobject_cast<MainWindow *>(parent())->clientForRow(index.row())->progress();
        progressBarOption.progress = progress < 0 ? 0 : progress;
        progressBarOption.text = QString().sprintf("%d%%", progressBarOption.progress);

        // Draw the progress bar onto the view.
        QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter);
    }
};

基本上可以看到，它检查要绘制的列是否具有特定索引，如果是，则它绘制进度条.我认为您可以对其进行一些调整，而不是使用QStyleOption，而可以使用自己的小部件.

Basically as you can see it checks if the column to be painted is of a specific index, if so it paints a progress bar. I think you could tweak it a little and instead of using a QStyleOption you could use your own widget.

不要忘记使用 setItemDelegate .

在调查您的问题时，我偶然发现了此线程，它详细说明了如何使用QItemDelegate绘制自定义窗口小部件，我相信它具有您可能需要的所有信息.

While investigating your question I've stumbled upon this thread, which elaborates how to paint a custom widget using a QItemDelegate, I believe it has all the info you might need.

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