具有自定义项目和自定义项目小部件的QListView/QListWidget [英] QListView/QListWidget with custom items and custom item widgets

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 .

QItemDelegate可用于提供 自定义显示功能和编辑器 用于基于以下项的项目视图的小部件 QAbstractItemView子类.用一个 为此目的的代表允许 显示和编辑机制 定制和独立开发 从模型和视图.

QItemDelegate can be used to provide custom display features and editor widgets for item views based on QAbstractItemView subclasses. Using a delegate for this purpose allows the display and editing mechanisms to be customized and developed independently from the model and view.

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.

不要忘记使用在调查您的问题时，我偶然发现了

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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