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[Qt]双击事件导致的问题

ds 2025/7/17 6:43:46

有如下代码

#include "mymodel.h"
#include <QDebug>myModel::myModel(QObject *parent) : QAbstractTableModel(parent)
{status << Qt::Unchecked << Qt::Unchecked << Qt::Unchecked;
}int myModel::rowCount(const QModelIndex &parent)const
{Q_UNUSED(parent);return 3;
}int myModel::columnCount(const QModelIndex &parent)const
{Q_UNUSED(parent);return 2;
}void myModel::setHeader(const QStringList &list)
{m_header = list;
}QVariant myModel::headerData(int section, Qt::Orientation orientation, int role) const
{if(role == Qt::DisplayRole){if(orientation == Qt::Horizontal){return m_header.at(section);}}return QVariant();
}QVariant myModel::data(const QModelIndex &index, int role)const
{if(role == Qt::DisplayRole){if(index.column() == 0){return QStringLiteral("%1号同学").arg(index.row() + 1);}if(index.column() == 1){return QStringLiteral("1000%1").arg(index.row() + 1);}}if(role == Qt::CheckStateRole){if(index.column() == 0){return status.at(index.row());}return QVariant();}return QVariant();
}Qt::ItemFlags myModel::flags(const QModelIndex &index) const
{if(!index.isValid()){return QAbstractItemModel::flags(index);}Qt::ItemFlags flags = QAbstractItemModel::flags(index);if(index.column() == 0){flags |= Qt::ItemIsUserCheckable;}return flags;
}bool myModel::setData(const QModelIndex &index, const QVariant &value, int role)
{if(!index.isValid()){return false;}if(role == Qt::CheckStateRole){if(index.column() == 0){status[index.row()] = value.toInt();emit dataChanged(index, index);return true;}}return false;
}

效果如下
在这里插入图片描述
额，效果不是很明显。但是当我快速点击鼠标左键时，发现checkbox的状态并没有立即修改，这是因为快速点击鼠标左键时，被识别成了双击事件，修改思路如下，创建一个类继承于QStyledItemDelegate，然后重写 bool QStyledItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index) 这个方法，当遇到双击事件时，单独处理即可。代码如下

#include "MyStyledItemDelegate.h"
#include <QEvent>MyStyledItemDelegate::MyStyledItemDelegate(QObject *parent) : QStyledItemDelegate(parent)
{}bool MyStyledItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{if(event->type() == QEvent::MouseButtonDblClick && index.column() == 0){model->setData(index, index.data(Qt::CheckStateRole).toInt() == Qt::Checked ? Qt::Unchecked : Qt::Checked ,Qt::CheckStateRole);return true;}else{return QStyledItemDelegate::editorEvent(event, model, option, index);}
}