From 8978488e66057d0935befabfe44b6c65660738b4 Mon Sep 17 00:00:00 2001 From: feiyangqingyun Date: Wed, 31 Mar 2021 15:58:26 +0800 Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B=E9=83=A8=E5=88=86=E4=BB=A3?= =?UTF-8?q?=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- dbpage/dbpage.cpp | 51 ++++++++++++++++++++++--------------- dbpage/dbpage.h | 17 ++++++++----- videowidget/videowidget.cpp | 10 ++++++++ videowidget/videowidget.h | 3 +++ 4 files changed, 53 insertions(+), 28 deletions(-) diff --git a/dbpage/dbpage.cpp b/dbpage/dbpage.cpp index cd6237c..fa70a91 100644 --- a/dbpage/dbpage.cpp +++ b/dbpage/dbpage.cpp @@ -13,7 +13,7 @@ QVariant SqlQueryModel::data(const QModelIndex &index, int role) const QVariant value = QSqlQueryModel::data(index, role); if (allCenter) { - if(role == Qt::TextAlignmentRole ) { + if (role == Qt::TextAlignmentRole) { value = Qt::AlignCenter; } } else { @@ -22,7 +22,7 @@ QVariant SqlQueryModel::data(const QModelIndex &index, int role) const bool existCenter = alignCenterColumn.contains(column); bool existRight = alignRightColumn.contains(column); - if(role == Qt::TextAlignmentRole) { + if (role == Qt::TextAlignmentRole) { if (existCenter) { value = Qt::AlignCenter; } @@ -37,9 +37,9 @@ QVariant SqlQueryModel::data(const QModelIndex &index, int role) const if (property("hoverRow").isValid()) { int row = property("hoverRow").toInt(); if (row == index.row()) { - if(role == Qt::BackgroundRole) { + if (role == Qt::BackgroundRole) { value = QColor(property("hoverBgColor").toString()); - } else if(role == Qt::TextColorRole) { + } else if (role == Qt::TextColorRole) { value = QColor(property("hoverTextColor").toString()); } } @@ -49,7 +49,7 @@ QVariant SqlQueryModel::data(const QModelIndex &index, int role) const if (property("hideColumn").isValid()) { int column = property("hideColumn").toInt(); if (column == index.column()) { - if(role == Qt::DisplayRole) { + if (role == Qt::DisplayRole) { QString letter = property("hideLetter").toString(); int start = property("hideStart").toInt(); int end = property("hideEnd").toInt(); @@ -144,8 +144,6 @@ DbPage *DbPage::Instance() DbPage::DbPage(QObject *parent) : QObject(parent) { startIndex = 0; - tempSql = ""; - sql = ""; queryModel = new SqlQueryModel; pageCurrent = 1; @@ -260,6 +258,24 @@ void DbPage::bindData(const QString &sql) emit receivePage(pageCurrent, pageCount, resultCount, resultCurrent); } +QString DbPage::getPageSql() +{ + //组织分页SQL语句,不同的数据库分页语句不一样 + QString sql = QString("select %1 from %2 %3 order by %4").arg(selectColumn).arg(tableName).arg(whereSql).arg(orderSql); + if (dbType == DbType_PostgreSQL || dbType == DbType_KingBase) { + sql = QString("%1 limit %3 offset %2;").arg(sql).arg(startIndex).arg(resultCurrent); + } else if (dbType == DbType_SqlServer) { + //取第m条到第n条记录：select top (n-m+1) id from tablename where id not in (select top m-1 id from tablename) + //sql = QString("select %1 from %2 %3 order by %4").arg(selectColumn).arg(tableName).arg(whereSql).arg(orderSql); + } else if (dbType == DbType_Oracle) { + //暂时没有找到好办法 + } else { + sql = QString("%1 limit %2,%3;").arg(sql).arg(startIndex).arg(resultCurrent); + } + + return sql; +} + void DbPage::slot_receiveCount(quint32 count, double msec) { if (labResult != 0) { @@ -294,10 +310,7 @@ void DbPage::slot_receiveCount(quint32 count, double msec) btnPre->setEnabled(true); } - tempSql = QString("select %1 from %2 %3 order by %4").arg(selectColumn).arg(tableName).arg(whereSql).arg(orderSql); - sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); //组织分页SQL语句 - - bindData(sql); + bindData(getPageSql()); } void DbPage::first() @@ -305,8 +318,7 @@ void DbPage::first() if (pageCount > 1) { startIndex = 0; pageCurrent = 1; - sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); - bindData(sql); + bindData(getPageSql()); btnLast->setEnabled(true); btnNext->setEnabled(true); } @@ -320,8 +332,7 @@ void DbPage::previous() if (pageCurrent > 1) { pageCurrent--; startIndex -= resultCurrent; - sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); - bindData(sql); + bindData(getPageSql()); btnLast->setEnabled(true); btnNext->setEnabled(true); } @@ -337,8 +348,7 @@ void DbPage::next() if (pageCurrent < pageCount) { pageCurrent++; startIndex += resultCurrent; - sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); - bindData(sql); + bindData(getPageSql()); btnFirst->setEnabled(true); btnPre->setEnabled(true); } @@ -354,8 +364,7 @@ void DbPage::last() if (pageCount > 0) { startIndex = (pageCount - 1) * resultCurrent; pageCurrent = pageCount; - sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); - bindData(sql); + bindData(getPageSql()); btnFirst->setEnabled(true); btnPre->setEnabled(true); } @@ -514,7 +523,7 @@ void DbPage::select() } //开始分页绑定数据前,计算好总数据量以及行数 - tempSql = QString("select count(%1) from %2 %3").arg(countName).arg(tableName).arg(whereSql); + QString sql = QString("select count(%1) from %2 %3").arg(countName).arg(tableName).arg(whereSql); //采用线程执行查询复合条件的记录行数 DbCountThread *dbCountThread = new DbCountThread(this); @@ -524,7 +533,7 @@ void DbPage::select() //设置数据库连接名称和查询语句,并启动线程 dbCountThread->setConnName(connName); - dbCountThread->setSql(tempSql); + dbCountThread->setSql(sql); //从5.10开始不支持数据库在线程中执行 #if (QT_VERSION <= QT_VERSION_CHECK(5,10,0)) dbCountThread->start(); diff --git a/dbpage/dbpage.h b/dbpage/dbpage.h index 4a26207..94f9d43 100644 --- a/dbpage/dbpage.h +++ b/dbpage/dbpage.h @@ -77,11 +77,14 @@ class DbPage : public QObject Q_OBJECT public: enum DbType { - DbType_Sqlite = 0, //sqlite数据库 - DbType_MySql = 1, //mysql数据库 - DbType_SqlServer = 3, //sqlserver数据库 - DbType_Access = 4, //access数据库 - DbType_PostgreSQL = 5 //postgresql数据库 + DbType_ODBC = 0, //odbc数据源 + DbType_Sqlite = 1, //sqlite数据库 + DbType_MySql = 2, //mysql数据库 + DbType_PostgreSQL = 3, //postgresql数据库 + DbType_SqlServer = 4, //sqlserver数据库 + DbType_Oracle = 5, //oracle数据库 + DbType_KingBase = 6, //人大金仓数据库 + DbType_Other = 255 //其他数据库 }; static DbPage *Instance(); @@ -97,8 +100,6 @@ private: static QScopedPointer self; int startIndex; //分页开始索引,每次翻页都变动 - QString tempSql; //临时SQL语句 - QString sql; //sql语句 SqlQueryModel *queryModel; //查询模型 QLabel *labPageCount; //总页数标签 @@ -143,6 +144,8 @@ private slots: private slots: //绑定sql语句到表格 void bindData(const QString &sql); + //生成分页sql语句 + QString getPageSql(); //收到记录行数 void slot_receiveCount(quint32 count, double msec); diff --git a/videowidget/videowidget.cpp b/videowidget/videowidget.cpp index 1c4af0c..dd30206 100644 --- a/videowidget/videowidget.cpp +++ b/videowidget/videowidget.cpp @@ -568,6 +568,16 @@ QList VideoWidget::getFaceRects() const return this->faceRects; } +QSize VideoWidget::sizeHint() const +{ + return QSize(400, 300); +} + +QSize VideoWidget::minimumSizeHint() const +{ + return QSize(40, 30); +} + void VideoWidget::updateImage(const QImage &image) { //拷贝图片有个好处,当处理器比较差的时候,图片不会产生断层,缺点是占用时间 diff --git a/videowidget/videowidget.h b/videowidget/videowidget.h index df6e3fd..6d7ba86 100644 --- a/videowidget/videowidget.h +++ b/videowidget/videowidget.h @@ -204,6 +204,9 @@ public: QColor getFaceColor() const; QList getFaceRects() const; + QSize sizeHint() const; + QSize minimumSizeHint() const; + private slots: //接收图像并绘制 void updateImage(const QImage &image);