高手请帮看一下,我的程序运行没错误,为什么显示不出来网格呢,我忽略那里了
void CWANGDlg::OnPaint()
{CPaintDC dc(this);}在头文件中添加成员变量:
CDC *pDC; //屏幕绘图设备
int m_High; //绘图起点
int m_Low; //绘图终点
int m_lCount[1024]; //数据存储数组
int m_now; //记录波形当前点
int m_time;
添加一个成员函数DrawWave(CDC *pDC)添加代码如下:void CMYDlg::DrawWave(CDC *pDC)
{
int i;int m_left,m_top,m_right,m_bottom;
int m_Interval = (m_High - m_Low)/10;
if (m_Interval < 1) m_Interval = 1;
// 获取绘制坐标的文本框
CWnd* pWnd = GetDlgItem(IDC_COORD);
pWnd->GetClientRect(&rect);pDC->Rectangle(&rect);
m_left = rect.left+10;
m_top = rect.top+10;
m_right = rect.right-10;
m_bottom = rect.bottom-20;
int m_IntervalPan = (m_right - m_left)/11;
if (m_IntervalPan < 1 ) m_IntervalPan =1;
// 创建画笔对象
CPen* pPenRed = new CPen;
// 红色画笔
pPenRed->CreatePen(PS_SOLID,1,RGB(255,0,0));
// 创建画笔对象
CPen* pPenBlue = new CPen; CPen* pPenGreen = new CPen;
// 蓝色画笔
pPenBlue->CreatePen(PS_SOLID,1,RGB(0,0, 255));
// 创建画笔对象CPen* pPenGreen = new CPen;
// 绿色画笔
pPenGreen->CreatePen(PS_DOT,1,RGB(0,255,0));
// 选中当前红色画笔,并保存以前的画笔
CGdiObject* pOldPen = pDC->SelectObject(pPenRed);
// 绘制坐标轴pDC->MoveTo(m_left,m_top);
// 垂直轴
pDC->LineTo(m_left,m_bottom);
// 水平轴
pDC->LineTo(m_right,m_bottom);
// 写X轴刻度值
for(i=0;i<10;i++){//
//str.Format(_T("%d"),m_Min+i*m_Interval);
str.Format(_T("%d"),m_Low+i*m_Interval);
pDC->TextOut(m_left+i*m_IntervalPan,m_bottom+3,str);}//
// str.Format(_T("%d"),m_Max);
str.Format(_T("%d"),m_High);
pDC->TextOut(m_left+10*m_IntervalPan,m_bottom+3,str);
// 绘制X轴刻度
for (i = m_left; i < m_right-20; i += 5){if ((i & 1) == 0)
{// 10的倍数
pDC->MoveTo(i + 10, m_bottom);
pDC->LineTo(i + 10, m_bottom+4);}
else{// 10的倍数
pDC->MoveTo(i + 10, m_bottom);pDC->LineTo(i + 10, m_bottom+2);}
}// 绘制Y轴箭头
pDC->MoveTo(m_right-5,m_bottom-5);
pDC->LineTo(m_right,m_bottom);
pDC->LineTo(m_right-5,m_bottom+5);
// 绘制X轴箭头
pDC->MoveTo(m_left-5,m_top+5);
pDC->LineTo(m_left,m_top);
pDC->LineTo(m_left+5,m_top+5);
// 绘制Y轴网格 选择绿色画笔
pDC->SelectObject(pPenGreen);
//
int iTemp = (m_bottom - m_top)/5;
for (i = 1 ;i <= 5 ;i++){pDC->MoveTo(m_left,m_bottom - i*iTemp);
pDC->LineTo(m_right,m_bottom - i*iTemp);}
// 恢复以前的画笔
pDC->SelectObject(pOldPen);delete pPenRed;
delete pPenBlue;
delete pPenGreen;
return;
}
void CWANGDlg::OnPaint()
{CPaintDC dc(this);}在头文件中添加成员变量:
CDC *pDC; //屏幕绘图设备
int m_High; //绘图起点
int m_Low; //绘图终点
int m_lCount[1024]; //数据存储数组
int m_now; //记录波形当前点
int m_time;
添加一个成员函数DrawWave(CDC *pDC)添加代码如下:void CMYDlg::DrawWave(CDC *pDC)
{
int i;int m_left,m_top,m_right,m_bottom;
int m_Interval = (m_High - m_Low)/10;
if (m_Interval < 1) m_Interval = 1;
// 获取绘制坐标的文本框
CWnd* pWnd = GetDlgItem(IDC_COORD);
pWnd->GetClientRect(&rect);pDC->Rectangle(&rect);
m_left = rect.left+10;
m_top = rect.top+10;
m_right = rect.right-10;
m_bottom = rect.bottom-20;
int m_IntervalPan = (m_right - m_left)/11;
if (m_IntervalPan < 1 ) m_IntervalPan =1;
// 创建画笔对象
CPen* pPenRed = new CPen;
// 红色画笔
pPenRed->CreatePen(PS_SOLID,1,RGB(255,0,0));
// 创建画笔对象
CPen* pPenBlue = new CPen; CPen* pPenGreen = new CPen;
// 蓝色画笔
pPenBlue->CreatePen(PS_SOLID,1,RGB(0,0, 255));
// 创建画笔对象CPen* pPenGreen = new CPen;
// 绿色画笔
pPenGreen->CreatePen(PS_DOT,1,RGB(0,255,0));
// 选中当前红色画笔,并保存以前的画笔
CGdiObject* pOldPen = pDC->SelectObject(pPenRed);
// 绘制坐标轴pDC->MoveTo(m_left,m_top);
// 垂直轴
pDC->LineTo(m_left,m_bottom);
// 水平轴
pDC->LineTo(m_right,m_bottom);
// 写X轴刻度值
for(i=0;i<10;i++){//
//str.Format(_T("%d"),m_Min+i*m_Interval);
str.Format(_T("%d"),m_Low+i*m_Interval);
pDC->TextOut(m_left+i*m_IntervalPan,m_bottom+3,str);}//
// str.Format(_T("%d"),m_Max);
str.Format(_T("%d"),m_High);
pDC->TextOut(m_left+10*m_IntervalPan,m_bottom+3,str);
// 绘制X轴刻度
for (i = m_left; i < m_right-20; i += 5){if ((i & 1) == 0)
{// 10的倍数
pDC->MoveTo(i + 10, m_bottom);
pDC->LineTo(i + 10, m_bottom+4);}
else{// 10的倍数
pDC->MoveTo(i + 10, m_bottom);pDC->LineTo(i + 10, m_bottom+2);}
}// 绘制Y轴箭头
pDC->MoveTo(m_right-5,m_bottom-5);
pDC->LineTo(m_right,m_bottom);
pDC->LineTo(m_right-5,m_bottom+5);
// 绘制X轴箭头
pDC->MoveTo(m_left-5,m_top+5);
pDC->LineTo(m_left,m_top);
pDC->LineTo(m_left+5,m_top+5);
// 绘制Y轴网格 选择绿色画笔
pDC->SelectObject(pPenGreen);
//
int iTemp = (m_bottom - m_top)/5;
for (i = 1 ;i <= 5 ;i++){pDC->MoveTo(m_left,m_bottom - i*iTemp);
pDC->LineTo(m_right,m_bottom - i*iTemp);}
// 恢复以前的画笔
pDC->SelectObject(pOldPen);delete pPenRed;
delete pPenBlue;
delete pPenGreen;
return;
}
0x5f48f63指令引用的0xcccccdc内存,该内存不能为read
要终止程序请单击确定
.....
这是怎么情况啊
你怎么做的?void CWANGDlg::OnPaint()
{
CPaintDC dc(this);
DrawWave(&dc);
}
http://blog.csdn.net/xianglitian/article/details/6100767
void CMyDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
...
dc.DrawIcon(x, y, m_hIcon);
}
else
{ CPaintDC dc(this);
下面都是我程序了
....
...
CDialog::OnPaint();
}
怎么会弹出指令框 0x5f48f63指令引用的0xcccccdc内存,该内存不能为read
要终止程序请单击确定
void CMyDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
...
dc.DrawIcon(x, y, m_hIcon);
}
else
{ CPaintDC dc(this);
下面都是我程序了
....
...
//CDialog::OnPaint(); //注释掉
}
{
CPaintDC dc(this); 这设置断点,刚运行出现对话框:Unhandled exception in CMyDlg.exe
0XC00000 Access Uio... 什么意思啊
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
...
dc.DrawIcon(x, y, m_hIcon);
}
else
{ CPaintDC dc(this);
下面都是我程序了
....
...
//CDialog::OnPaint(); //注释掉
}
我确定CWnd* pWnd = GetDlgItem(IDC_COORD);这里的IDC_COORD控件在对话框CWANGDlg上
我把断点放在这: else
{ CPaintDC dc(this); 刚执行就弹出对话框说:
Unhandled exception in CMyDlg.exe
0XC00000 Access Uio...