Qt之通用QAbstractTableModel数据框架

通用QAbstractTableModel数据框架ModelData

我们在使用Model/View框架的时候的时候总是需要根据不同的需求设计不同的数据Model。其实Table的数据其实就相当于一个二维的集合，所以我设计了如下的通用格式

环境

Qt5.6.2+Vs2013

代码

首先是对表格的单元格进行抽象
QMyTableModelItem.h

#include 
#includeq

class QMyTableModelItem
{
public:
	QMyTableModelItem(int row, int col);
	~QMyTableModelItem();

	//设置参数
	void setItemData(const QVariant& data, int role = Qt::DisplayRole);

	//获取参数
	QVariant data(int role = Qt::DisplayRole);

private:
	int x_row;				//行
	int x_col;				//列

	//key: role
	QMap x_roleData;
};

QMyTableModelItem.cpp

#include "QMyTableModelItem.h"

QMyTableModelItem::QMyTableModelItem(int row, int col)
	: x_row(row)
	, x_col(col)
{
	x_roleData.clear();
}

QMyTableModelItem::~QMyTableModelItem()
{
	x_roleData.clear();
}

void QMyTableModelItem::setItemData(const QVariant& data, int role /*= Qt::DisplayRole*/)
{
	auto _iter = x_roleData.find(role);

	if (_iter != x_roleData.end())
	{
		//存在
		_iter.value() = data;
	}
	else
	{
		x_roleData.insert(role, data);
	}
}

QVariant QMyTableModelItem::data(int role /*= Qt::DisplayRole*/)
{
	auto _iter = x_roleData.find(role);

	if (_iter != x_roleData.end())
	{
		//存在
		return _iter.value();
	}
	
	return QVariant();
}

其次建立表格模型
QMyTableModelData.h

#include  

#include "QMyTableModelItem.h"

class QMyTableModelData : public QObject
{
	Q_OBJECT

public:
	explicit QMyTableModelData(QObject *parent = nullptr);
	~QMyTableModelData();

	//设置模型参数
	void setModelData(int row, int col, const QVariant& data, int role = Qt::DisplayRole);

	//获取参数
	QVariant data(int row, int col, int role = Qt::DisplayRole);

	//函数
	int rowCount() const;
	
	//列数
	int columnCount() const;

private:
	int x_rowCnt;				//行数
	int x_colCnt;				//列数

	//QPair //row, col
	QMap, QMyTableModelItem> x_modelDatas;
};

QMyTableModelData.cpp

#include "QMyTableModelData.h"

QMyTableModelData::QMyTableModelData(QObject *parent)
	: QObject(parent)
{
	x_rowCnt = x_colCnt = 0;

	x_modelDatas.clear();

}

QMyTableModelData::~QMyTableModelData()
{
	x_modelDatas.clear();
}

void QMyTableModelData::setModelData(int row, int col, const QVariant& data, int role /*= Qt::DisplayRole*/)
{
	if (x_rowCnt <= row)
	{
		x_rowCnt = row + 1;
	}

	if (x_colCnt <= col)
	{
		x_colCnt = col + 1;
	}

	QPair _pair(row, col);

	auto _iter = x_modelDatas.find(_pair);

	if (_iter != x_modelDatas.end())
	{
		//存在
		QMyTableModelItem& _item = _iter.value();
		
		_item.setItemData(data, role);
	}
	else
	{
		//不存在
		QMyTableModelItem _item(row, col);

		_item.setItemData(data, role);

		x_modelDatas.insert(_pair, _item);
	}
}

QVariant QMyTableModelData::data(int row, int col, int role /*= Qt::DisplayRole*/)
{
	QPair _pair(row, col);

	auto _iter = x_modelDatas.find(_pair);

	if (_iter != x_modelDatas.end())
	{
		//存在
		QMyTableModelItem _item = _iter.value();

		return _item.data(role);
	}

	return QVariant();
}

int QMyTableModelData::rowCount() const
{
	return x_rowCnt;
}

int QMyTableModelData::columnCount() const
{
	return x_colCnt;
}

这样可以用QMyTableModelData类作为Model的数据存储，进行Model/View编写

使用

	x_pModelData = new QMyTableModelData(this);
	x_pModelData->setModelData(0, 0, 1);
	x_pModelData->setModelData(0, 0, true, Wsd::CheckRole);
	x_pModelData->setModelData(0, 0, QVariant(Qt::AlignCenter), Qt::TextAlignmentRole);
	x_pModelData->setModelData(0, 1, QString::fromLocal8Bit("张三"));
	x_pModelData->setModelData(0, 1, QColor(Qt::red), Qt::ForegroundRole);
	x_pModelData->setModelData(0, 2, 16);

	x_pModelData->setModelData(1, 0, 2);
	x_pModelData->setModelData(1, 0, QVariant(Qt::AlignCenter), Qt::TextAlignmentRole);
	x_pModelData->setModelData(1, 1, QString::fromLocal8Bit("李四"));
	x_pModelData->setModelData(1, 2, 16);

然后在自己的model类中使用

QVariant QCustomTableModel::data(const QModelIndex &index, int role /*= Qt::DisplayRole*/) const
{
	if (!index.isValid())
	{
		return QVariant();
	}

	return x_pModelData->data(index.row(), index.column(), role);
}

效果