基于QT+c++实现的历史编辑器(支持历史搜索 & 关键字匹配)

#include "historymodel.h" #include <QMultiMap> HistoryModel::HistoryModel() { /** * @note historyData <QList> * 用于存储历史记录。 * 可自由填充，我这里直接手动填充了。 */ qsrand(uint(time(nullptr))); for (int i = 0; i < 20; ++i) { QString randStr; for (int j = 0; j < 10; ++j) { randStr += QString::number(qrand() % 10); } m_historyData.push_back(randStr); } m_data = m_historyData; } int HistoryModel::rowCount(const QModelIndex &parent) const { Q_UNUSED(parent); return m_data.count(); } int HistoryModel::columnCount(const QModelIndex &parent) const { Q_UNUSED(parent); return 1; } QVariant HistoryModel::data(const QModelIndex &index, int role) const { if (index.row() < 0 || index.row() >= m_data.count()) return QVariant(); switch (role) { case Qt::DisplayRole: return m_data.at(index.row()); default: break; } return QVariant(); } void HistoryModel::sortByKey(const QString &key) { if (key.isEmpty()) { beginResetModel(); m_data = m_historyData; endResetModel(); } else { QMultiMap<int, QString> temp; for (auto str : m_historyData) { int ret = str.indexOf(key); if (ret == -1) continue; else temp.insert(ret, str); } beginResetModel(); m_data.clear(); if (!temp.isEmpty()) { //也可 for range-based for (auto it = temp.begin(); it != temp.end(); it++) { m_data.push_back(it.value()); } } endResetModel(); } }