《鼠标移动时的背景透明文字不透明的实时提示框效果实现》用win32完美的实现出来了,并且做了详细的解释,请你仔细看看。在这里我就不多说了,直接贴出MFC的代码:
void C提示框Dlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // 用于绘制的设备上下文
SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);
// 使图标在工作区矩形中居中
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// 绘制图标
dc.DrawIcon(x, y, m_hIcon);
}
else
{
PAINTSTRUCT ps;
CDC *pDC=BeginPaint(&ps);
GetClientRect(&rectClient);
pDC->SelectObject(CreatePen(PS_SOLID,0,RGB(120,120,120)));
for(int i=0; i<rectClient.Width(); i+=50)
{
pDC->MoveTo(i,0);
pDC->LineTo(i,rectClient.bottom);
}
for(int j=0; j<rectClient.Height();j+=50)
{
pDC->MoveTo(0,j);
pDC->LineTo(rectClient.right,j);
}
DeleteObject(pDC->SelectObject(GetStockObject(WHITE_PEN)));
if(!IsFirst)
{
pDC->SetBkColor(RGB(255,244,10));
wsprintf(msg,_T(" %d,%d "),ptNew.x,ptNew.y);
pDC->SetTextColor(RGB(0,0,0));
pDC->TextOutW(ptNew.x+15,ptNew.y+10,msg);
}
else
{
IsFirst=false;
}
EndPaint(&ps);
CDialogEx::OnPaint();
}
}
void C提示框Dlg::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
ptNew.x=point.x;
ptNew.y=point.y;
CDC *pDC=GetDC();
pDC->SelectObject(GetStockObject(WHITE_BRUSH));
pDC->SelectObject(GetStockObject(NULL_PEN));
pDC->Ellipse(ptOld.x,ptOld.y,ptOld.x+100,ptOld.y+35);
pDC->SelectObject(CreateSolidBrush(RGB(255,150,10)));
pDC->SelectObject(GetStockObject(NULL_PEN));
pDC->Ellipse(ptNew.x,ptNew.y,ptNew.x+100,ptNew.y+35);
DeleteObject(pDC->SelectObject(GetStockObject(WHITE_BRUSH)));
ptOld.x=ptNew.x;
ptOld.y=ptNew.y;
Invalidate(FALSE);
SetTimer(1,500,NULL);
ReleaseDC(pDC);
CDialogEx::OnMouseMove(nFlags, point);
}
void C提示框Dlg::OnTimer(UINT_PTR nIDEvent)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
CDC *pDC=GetDC();
pDC->SelectObject(GetStockObject(WHITE_BRUSH));
pDC->SelectObject(GetStockObject(NULL_PEN));
pDC->Ellipse(ptOld.x,ptOld.y,ptOld.x+100,ptOld.y+35);
pDC->SelectObject(CreatePen(PS_SOLID,0,RGB(120,120,120)));
for(int i=0; i<rectClient.Width(); i+=50)
{
pDC->MoveTo(i,0);
pDC->LineTo(i,rectClient.bottom);
}
for(int j=0; j<rectClient.Height();j+=50)
{
pDC->MoveTo(0,j);
pDC->LineTo(rectClient.right,j);
}
ReleaseDC(pDC);
CDialogEx::OnTimer(nIDEvent);
}
代码实现: