grid.cpp

比较简陋的数据库应用,唯一能看的就是对ODBC的封装...

#include "Grid.h"

GridInfo::GridInfo(int n)
{
	num = n;
	m_Info = new String[n];
}

GridInfo::~GridInfo()
{	
//	if (num != 1)
	delete [] m_Info;
//	m_Info = NULL;
}

Grid::Grid()
{
	gi = new GridInfo(1);
	gi->m_Info[0] = " ";

	height = minHeight = 1;
	width = minWidth = 1;
}

Grid::~Grid()
{
	delete gi;
//	gi = NULL;
}

void Grid::SetWidth(int nWidth)
{
	if (nWidth < minWidth)
		return;
	int i, begin, last;
	if (nWidth > width)
	{
		for (i = 0; i < height; i++)
		{
			last = (nWidth - width) / 2;
			begin = nWidth - width - last;
			gi->m_Info[i] = String(' ', begin) + gi->m_Info[i] + String(' ', last);
		}
	}
	else if (nWidth < width)
	{
		for (i = 0; i < height; i++)
		{
			last = (width - nWidth) / 2;
			begin = width - nWidth - last;
			last = width - last - 1;
			gi->m_Info[i] = gi->m_Info[i].getSub(begin, last);
		}
	}
	width = nWidth;
}

void Grid::SetHeight(int nHeight)
{
	if (nHeight < minHeight)
		return;
	int i, beg, last;
	GridInfo* temp;
	if (nHeight > height)
	{
		last = (nHeight - height) / 2;
		beg = nHeight - height - last;
		temp = new GridInfo(nHeight);
		for (i = 0; i < height; i++)
			temp->m_Info[i + beg] = gi->m_Info[i];
		for (i = 0; i < beg; i++)
			temp->m_Info[i] = String(' ', width);
		for (i = 0; i < last; i++)
			temp->m_Info[i + beg + height] = String(' ', width);
		delete gi;
		gi = temp;
	}
	else if (nHeight < height)
	{
		last = (height - nHeight) / 2;
		beg = height - nHeight - last;
		temp = new GridInfo(nHeight);
		for (i = 0; i < nHeight; i++)
			temp->m_Info[i] = gi->m_Info[i + beg];
		delete gi;
		gi = temp;
	}
	height = nHeight;
}

void Grid::SetGridInfo(const GridInfo *agi)
{
	int i, j;
	int begin, last;
	minWidth = 0;
	delete gi;
	gi = new GridInfo(agi->num);
	for (i = 0; i < gi->num; i++)
	{
		gi->m_Info[i] = agi->m_Info[i];
		if (minWidth < gi->m_Info[i].getlenth())
			minWidth = gi->m_Info[i].getlenth();
	}
	minHeight = gi->num;
	width = minWidth;
	height = minHeight;
	if (gi->num == 1 && gi->m_Info[0].getlenth() == 0)
	{
		gi->m_Info[0] = ' ';
		height = minHeight = 1;
		width = minWidth = 1;
	}
	for (i = 0; i < gi->num; i++)
	{
		j = gi->m_Info[i].getlenth();
		if (j < minWidth)
		{
			last = (minWidth - j) / 2;
			begin = minWidth - j - last;
			gi->m_Info[i] = String(' ', begin) + gi->m_Info[i] + String(' ', last);
		}
	}
}

int Grid::GetHeight() const
{
	return height;
}

int Grid::GetWidth() const
{
	return width;
}

GridInfo* Grid::GetInfo() const
{
	return gi;
}

/*
std::ostream& operator<<(std::ostream& out, const Grid& gr)
{
	for (int i = 0; i< gr.height; i++)
		out << gr.gi->m_Info[i] << std::endl;
	return out;
}
*/