请教如何用STATIC控件在对话框中实现单行跑马灯的效果?

Question

如题,小弟分不多,大家帮帮忙

Answer 1

SetTimer定时MoveWindow移动Static控件，注意控件ID不要用IDC_STATIC。

Answer 2

SetTimer
{
  STATIC.MoveWindow();
}

Answer 3

时间匆忙，简单写了一个demo，你自己继续往下写
基本思路就是扩展CStatic自绘，
在CStatic初始化的时候，将文字在MemDC上绘出一个BITMAP位图，然后开个定时器，根据走马灯的位置偏移写到CStatic的DC上去。
class CMarquee : public CStatic
{
DECLARE_DYNAMIC(CMarquee)public:
CMarquee();
virtual ~CMarquee();
protected:
HBITMAP m_hBmp;
SIZE m_size;
HDC m_hMemDC;
int m_position;
protected:
DECLARE_MESSAGE_MAP()
public:
void start();
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
afx_msg void OnPaint();
afx_msg void OnTimer(UINT_PTR nIDEvent);
};
// Marquee.cpp : 实现文件
//#include "stdafx.h"
#include "t_marquee.h"
#include "Marquee.h"
// CMarqueeIMPLEMENT_DYNAMIC(CMarquee, CStatic)CMarquee::CMarquee()
{
m_hMemDC = 0;
m_hBmp = 0;
m_position = 0;
}CMarquee::~CMarquee()
{
if(m_hBmp)
{
::DeleteObject(m_hBmp);
m_hBmp = 0;
}
if(m_hMemDC)
{
::DeleteDC(m_hMemDC);
m_hMemDC = 0;
}
}
BEGIN_MESSAGE_MAP(CMarquee, CStatic)
ON_WM_ERASEBKGND()
ON_WM_PAINT()
ON_WM_TIMER()
END_MESSAGE_MAP()// CMarquee 消息处理程序BOOL CMarquee::OnEraseBkgnd(CDC* pDC)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值 return CStatic::OnEraseBkgnd(pDC);
}void CMarquee::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CStatic::OnPaint()
CRect rc;
GetClientRect(rc);
::FillRect(dc.m_hDC,rc,::GetSysColorBrush(COLOR_3DFACE));
if(m_hMemDC)
{
int width = this->m_size.cx;
if(this->m_position+width>rc.Width())
width = rc.Width()-this->m_position;
::BitBlt(dc.m_hDC,m_position,0,width,m_size.cy,m_hMemDC,0,0,SRCCOPY);
int idle = this->m_size.cx-width;
if(idle>0)
{//如果已经到了区域末端，需裁剪尾部，显示到最前端，这样就有走马灯的效果了
::BitBlt(dc.m_hDC,0,0,idle,m_size.cy,m_hMemDC,this->m_size-idle,0,SRCCOPY);
}
}
}void CMarquee::start()
{
CRect rc;
GetClientRect(rc); HDC hDC = ::GetDC(this->GetSafeHwnd());
CString txt;
this->GetWindowText(txt);
m_hMemDC = ::CreateCompatibleDC(NULL);
::SetBkMode(m_hMemDC,TRANSPARENT);
::GetTextExtentPoint(m_hMemDC,txt,txt.GetLength(),&m_size);
m_hBmp = ::CreateCompatibleBitmap(hDC,m_size.cx,m_size.cy);
::SelectObject(m_hMemDC,m_hBmp);
::FillRect(m_hMemDC,CRect(0,0,m_size.cx,m_size.cy),::GetSysColorBrush(COLOR_3DFACE));
::TextOut(m_hMemDC,0,0,txt,txt.GetLength());
this->Invalidate();
this->SetTimer(1,200,0);
}void CMarquee::OnTimer(UINT_PTR nIDEvent)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
m_position+=5;
CRect rc;
this->GetClientRect(rc);
if(m_position>=rc.Width())
m_position = 0;
this->Invalidate();
CStatic::OnTimer(nIDEvent);
}
但是走马效果有一点问题，估计是位图裁剪没裁剪好，你可以继续往下改，反正大概思路不会错的
外部调用CMarquee::start()即开始走马灯