149 lines
4.4 KiB
C++
149 lines
4.4 KiB
C++
#ifndef _DATA_COLUMN_
|
||
#define _DATA_COLUMN_
|
||
|
||
#define INSENSETIVE
|
||
#include <iostream>
|
||
#include <QString>
|
||
#include <QDebug>
|
||
#include "UtilityGlobal.h"
|
||
#include <QDateTime>
|
||
using namespace std;
|
||
|
||
class DataTable;
|
||
|
||
/* 定义：表示 DataTable 或DataRow中的列的架构
|
||
DataColumn是用于创建 架构DataTable的基本构建基块。 通过将一个或多个 DataColumn 对象添加到 来 DataColumnCollection生成架构。
|
||
可通过Value()获取值Value(param)设置值
|
||
也可通过=设置值 */
|
||
template <typename T>
|
||
class UTILITY_API TDataColumn
|
||
{
|
||
public:
|
||
TDataColumn() : _column_name(QString()), _caption(QString()){};
|
||
TDataColumn(const QString& column_name) : _column_name(column_name), _caption(QString()){};
|
||
TDataColumn(const QString& column_name, QVariant::Type column_type) : _column_name(column_name), _type(column_type){};
|
||
virtual ~TDataColumn(){};
|
||
|
||
public:
|
||
void Caption(const QString& caption) { _caption = caption; } //设置列的标题
|
||
QString Caption() const { return _caption.size() ? _caption : _column_name; } //获取列的标题
|
||
void ColumnName(const QString& column_name) { _column_name = column_name; } //设置 DataColumnCollection 中的列的名称
|
||
QString ColumnName() const { return _column_name; } //获取 DataColumnCollection 中的列的名称
|
||
void Value(const T& value) { _value = value; } //获取值
|
||
T Value() const { return _value; } //设置值
|
||
void Table(DataTable* p_table){ _table = p_table; } //设置列所属的 DataTable
|
||
DataTable* Table() const { return _table; } //获取列所属的 DataTable
|
||
QVariant::Type DataType() const { return _type;} //获取存储在列中的数据的类型
|
||
void DataType(QVariant::Type column_type) { _type = column_type;} //设置存储在列中的数据的类型
|
||
|
||
protected:
|
||
QString _column_name; //列名
|
||
QString _caption; //列的标题
|
||
T _value = T(); //值
|
||
QVariant::Type _type; //列的数据类型
|
||
DataTable* _table = nullptr; //列所属DataTable
|
||
};
|
||
|
||
//template class UTILITY_API TDataColumn<QString>;
|
||
//template class UTILITY_API TDataColumn<std::string>;
|
||
template class UTILITY_API TDataColumn<QVariant>; // 经测试，QVariant没有精度问题
|
||
|
||
class UTILITY_API DataColumn : public TDataColumn<QVariant>
|
||
{
|
||
friend class DataColumnCollection;
|
||
friend class DataTable;
|
||
|
||
public:
|
||
DataColumn() : TDataColumn<QVariant>(){};
|
||
explicit DataColumn(const QString& column_name) : TDataColumn<QVariant>(column_name) {}
|
||
DataColumn(const QString& column_name, QVariant::Type column_type) : TDataColumn<QVariant>(column_name, column_type) {}
|
||
~DataColumn() { };
|
||
|
||
QString toString()
|
||
{
|
||
if(this->Value().isNull())
|
||
{
|
||
return "";
|
||
}
|
||
|
||
if (this->DataType() == QVariant::DateTime)
|
||
{
|
||
return this->Value().toDateTime().toString("yyyy-MM-dd");
|
||
}
|
||
else
|
||
{
|
||
return this->Value().toString();
|
||
}
|
||
|
||
|
||
}
|
||
int toInt()
|
||
{
|
||
if(this->Value().isNull())
|
||
{
|
||
return 0;
|
||
}
|
||
return this->Value().toInt();
|
||
}
|
||
double toDouble()
|
||
{
|
||
if(this->Value().isNull())
|
||
{
|
||
return 0;
|
||
}
|
||
return this->Value().toDouble();
|
||
}
|
||
|
||
bool toBool()
|
||
{
|
||
if(this->Value().isNull())
|
||
{
|
||
return false;
|
||
}
|
||
return this->Value().toBool();
|
||
}
|
||
DataColumn(const DataColumn& data_column) { *this = data_column; }
|
||
DataColumn &operator=(const DataColumn& data_column)
|
||
{
|
||
_column_name = data_column._column_name;
|
||
_caption = data_column._caption;
|
||
_value = data_column._value;
|
||
_table = data_column._table;
|
||
_type = data_column._type;
|
||
return *this;
|
||
}
|
||
DataColumn &operator=(const QVariant& value) { //可使用=给value赋值
|
||
_value = value;
|
||
return *this;
|
||
}
|
||
|
||
};
|
||
|
||
//备用代码： QString 版本
|
||
/* class UTILITY_API DataColumn : public TDataColumn<QString>
|
||
{
|
||
public:
|
||
friend class DataColumnCollection;
|
||
friend class DataTable;
|
||
DataColumn() : TDataColumn<QString>(){};
|
||
~DataColumn(){ qDebug() << "delete!"; };
|
||
DataColumn(const DataColumn& data_column){ *this = data_column; }
|
||
DataColumn &operator=(const DataColumn& data_column)
|
||
{
|
||
_column_name = data_column._column_name;
|
||
_caption = data_column._caption;
|
||
_value = data_column._value;
|
||
_table = data_column._table;
|
||
return *this;
|
||
}
|
||
DataColumn(const QString& column_name) : TDataColumn<QString>(column_name){}
|
||
void Show()
|
||
{
|
||
qDebug() << "columnName:" << _column_name << ",caption:" << Caption() << ",value:" << _value ;
|
||
}
|
||
|
||
};
|
||
*/
|
||
|
||
#endif
|