qt 实现气泡聊天界面-Go服务器开发

要实现气泡聊天界面，你可以使用 Qt 的 QListView 和自定义的委托类来完成。下面是一个简单的示例代码：

#include <QApplication>
#include <QListView>
#include <QStandardItemModel>
#include <QStyledItemDelegate>
#include <QPainter>
class BubbleDelegate : public QStyledItemDelegate {
public:
    explicit BubbleDelegate(QObject* parent = nullptr) : QStyledItemDelegate(parent) {}
    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const override {
        QString text = index.data(Qt::DisplayRole).toString();
        bool isRightBubble = index.data(Qt::UserRole).toBool();
        // 设置字体和颜色
        QFont font = option.font;
        QColor textColor = option.palette.text().color();
        if (isRightBubble)
            textColor = QColor(255, 255, 255);  // 右侧气泡文字颜色为白色
        // 绘制气泡背景
        QRect bubbleRect = option.rect.adjusted(2, 2, -2, -2);
        if (isRightBubble)
            painter->setBrush(QColor(0, 120, 215));   // 右侧气泡背景颜色为蓝色
        else
            painter->setBrush(QColor(225, 225, 225)); // 左侧气泡背景颜色为灰色
        painter->drawRoundedRect(bubbleRect, 10, 10);
        // 绘制文字内容
        painter->setFont(font);
        painter->setPen(textColor);
        QRect textRect = bubbleRect.adjusted(10, 10, -10, -10);
        painter->drawText(textRect, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, text);
    }
    QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override {
        QString text = index.data(Qt::DisplayRole).toString();
        QFontMetrics metrics(option.font);
        QRect boundingRect = metrics.boundingRect(QRect(0, 0, 300, 0), Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, text);
        return QSize(boundingRect.width() + 20, boundingRect.height() + 20); // 调整大小以适应内容
    }
};
int main(int argc, char* argv[]) {
    QApplication app(argc, argv);
    QListView listView;
    QStandardItemModel model;
    BubbleDelegate delegate;
    listView.setModel(&model);
    listView.setItemDelegate(&delegate);
    // 添加左侧气泡项
    QList<QStandardItem*> leftItems;
    leftItems.append(new QStandardItem("Hello!"));
    leftItems.last()->setData(false, Qt::UserRole); // 左侧气泡标记为 false
    model.appendRow(leftItems);
     // 添加右侧气泡项
     QList<QStandardItem*> rightItems;
     rightItems.append(new QStandardItem("Hi there!"));
     rightItems.last()->setData(true, Qt::UserRole); // 右侧气泡标记为 true
     model.appendRow(rightItems);
     listView.show();
     return app.exec();
}