Change to subforder project model.

limereport/lrgroupfunctions.h

@@ -0,0 +1,150 @@
+/***************************************************************************
+ *   This file is part of the Lime Report project                          *
+ *   Copyright (C) 2015 by Alexander Arin                                  *
+ *   arin_a@bk.ru                                                          *
+ *                                                                         *
+ **                   GNU General Public License Usage                    **
+ *                                                                         *
+ *   This library is free software: you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation, either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *                                                                         *
+ **                  GNU Lesser General Public License                    **
+ *                                                                         *
+ *   This library is free software: you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Lesser General Public License as        *
+ *   published by the Free Software Foundation, either version 3 of the    *
+ *   License, or (at your option) any later version.                       *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with this library.                                      *
+ *   If not, see <http://www.gnu.org/licenses/>.                           *
+ *                                                                         *
+ *   This library is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ ****************************************************************************/
+#ifndef LRGROUPFUNCTIONS_H
+#define LRGROUPFUNCTIONS_H
+
+#include <QString>
+#include <QVariant>
+#include <QVector>
+
+namespace LimeReport{
+
+class DataSourceManager;
+class BandDesignIntf;
+
+class GroupFunction : public QObject{
+    Q_OBJECT
+public:
+    enum DataType{Variable,Field,Srcipt,ContentItem};
+    GroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager);
+    bool isValid(){return m_isValid;}
+    void setInvalid(QString message){m_isValid=false,m_errorMessage=message;}
+    const QString& name(){return m_name;}
+    const QString& data(){return m_data;}
+    const QString& error(){return m_errorMessage;}
+    QVector<QVariant>& values(){return m_values;}
+    const QString& dataBandName(){return m_dataBandName;}
+    virtual QVariant calculate()=0;
+public slots:
+    void slotBandRendered(BandDesignIntf* band);
+protected:
+    void setName(const QString& value){m_name=value;}
+    QVariant addition(QVariant value1, QVariant value2);
+    QVariant subtraction(QVariant value1, QVariant value2);
+    QVariant division(QVariant value1, QVariant value2);
+    QVariant multiplication(QVariant value1, QVariant value2);
+private:
+    QString m_data;
+    QString m_name;
+    DataType m_dataType;
+    QString m_dataBandName;
+    QVector<QVariant> m_values;
+    DataSourceManager* m_dataManager;
+    bool m_isValid;
+    QString m_errorMessage;
+};
+
+class GroupFunctionCreator{
+public:
+    virtual GroupFunction* createFunction(const QString&, const QString&, DataSourceManager*)=0;
+    virtual ~GroupFunctionCreator(){}
+};
+
+class GroupFunctionFactory{
+public:
+    void registerFunctionCreator(const QString& functionName,GroupFunctionCreator* creator){
+        m_creators.insert(functionName,creator);
+    }
+    QList<QString> functionNames(){return m_creators.keys();}
+    GroupFunction* createGroupFunction(const QString& functionName, const QString& expression, const QString& dataBandName, DataSourceManager* dataManager);
+    ~GroupFunctionFactory();
+private:
+    QMap<QString,GroupFunctionCreator*> m_creators;
+};
+
+class CountGroupFunction :public GroupFunction{
+    Q_OBJECT
+public:
+    CountGroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager)
+        :GroupFunction(expression, dataBandName, dataManager){setName("COUNT");}
+protected:
+    virtual QVariant calculate(){return values().count();}
+};
+
+class SumGroupFunction :public GroupFunction{
+    Q_OBJECT
+public:
+    SumGroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager)
+        :GroupFunction(expression, dataBandName, dataManager){setName("SUM");}
+protected:
+    virtual QVariant calculate();
+};
+
+class AvgGroupFunction :public GroupFunction{
+    Q_OBJECT
+public:
+    AvgGroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager)
+        :GroupFunction(expression, dataBandName, dataManager){setName("AVG");}
+protected:
+    virtual QVariant calculate();
+};
+
+class MinGroupFunction :public GroupFunction{
+    Q_OBJECT
+public:
+    MinGroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager)
+        :GroupFunction(expression, dataBandName, dataManager){setName("MIN");}
+protected:
+    virtual QVariant calculate();
+};
+
+class MaxGroupFunction :public GroupFunction{
+    Q_OBJECT
+public:
+    MaxGroupFunction(const QString& expression, const QString& dataBandName, DataSourceManager *dataManager)
+        :GroupFunction(expression, dataBandName, dataManager){setName("MAX");}
+protected:
+    virtual QVariant calculate();
+};
+
+template <typename T>
+class ConstructorGroupFunctionCreator : public GroupFunctionCreator{
+    virtual GroupFunction* createFunction(const QString& expression, const QString &dataBandName, DataSourceManager* dataManager);
+};
+
+template< typename T >
+GroupFunction* ConstructorGroupFunctionCreator< T >::createFunction(const QString &expression, const QString &dataBandName, DataSourceManager *dataManager)
+{
+    return new T(expression, dataBandName, dataManager);
+}
+
+} //namespace LimeReport
+
+#endif // LRGROUPFUNCTIONS_H