bool FileIO::Open(const char* filename, uint flg)
{
Close();
strncpy(path, filename, MAX_PATH);
DWORD access = (flg & readonly ? 0 : GENERIC_WRITE) | GENERIC_READ;
DWORD share = (flg & readonly) ? FILE_SHARE_READ : 0;
DWORD creation = flg & create ? CREATE_ALWAYS : OPEN_EXISTING;
hfile = CreateFile(filename, access, share, 0, creation, 0, 0);
flags = (flg & readonly) | (hfile == INVALID_HANDLE_VALUE ? 0 : open);
if (!(flags & open))
{
switch (GetLastError())
{
case ERROR_FILE_NOT_FOUND:
error = file_not_found;
break;
case ERROR_SHARING_VIOLATION:
error = sharing_violation;
break;
default:
error = unknown;
break;
}
}
SetLogicalOrigin(0);
return !!(flags & open);
}
void CLCDScrollingText::ResetUpdate(void)
{
m_eState = STATE_START_DELAY;
m_dwEllapsedTime = 0;
m_dwLastUpdate = GetTickCount();
m_nScrollingDistance = -1;
m_fTotalDistance = 0;
SetLeftMargin(0);
SetLogicalOrigin(0, 0);
CLCDText::ResetUpdate();
}
bool FileIO::CreateNew(const char* filename)
{
Close();
strncpy(path, filename, _MAXPATH);
fp = fopen(filename, "wb");
if (!fp) return false;
SetLogicalOrigin(0);
return !!(flags & open);
}
bool FileIO::Open(const char* filename, uint flg)
{
Close();
strncpy(path, filename, _MAXPATH);
fp = fopen(filename, "rb");
if (!fp) return false;
SetLogicalOrigin(0);
return true;
}
bool FileIO::CreateNew(const char* filename)
{
Close();
strncpy(path, filename, MAX_PATH);
DWORD access = GENERIC_WRITE | GENERIC_READ;
DWORD share = 0;
DWORD creation = CREATE_NEW;
hfile = CreateFile(filename, access, share, 0, creation, 0, 0);
flags = (hfile == INVALID_HANDLE_VALUE ? 0 : open);
SetLogicalOrigin(0);
return !!(flags & open);
}
bool FileIO::Reopen(uint flg)
{
if (!(flags & open)) return false;
if ((flags & readonly) && (flg & create)) return false;
if (flags & readonly) flg |= readonly;
Close();
DWORD access = (flg & readonly ? 0 : GENERIC_WRITE) | GENERIC_READ;
DWORD share = flg & readonly ? FILE_SHARE_READ : 0;
DWORD creation = flg & create ? CREATE_ALWAYS : OPEN_EXISTING;
hfile = CreateFile(path, access, share, 0, creation, 0, 0);
flags = (flg & readonly) | (hfile == INVALID_HANDLE_VALUE ? 0 : open);
SetLogicalOrigin(0);
return !!(flags & open);
}
void CLCDScrollingText::OnDraw(CLCDGfxBase &rGfx)
{
if (!m_nTextLength)
{
return;
}
// calculate the scrolling distance
if (-1 == m_nScrollingDistance)
{
CLCDText::OnDraw(rGfx);
if (SCROLL_VERT == m_eScrollDir)
{
// determine how far we have to travel until scrolling stops
m_nScrollingDistance = ((GetHeight()) >= GetVExtent().cy) ?
0 : (GetVExtent().cy - GetHeight());
SetLogicalSize(GetVExtent().cx, GetVExtent().cy);
}
else
{
// determine how far we have to travel until scrolling stops
m_nScrollingDistance = ((GetWidth()) >= GetHExtent().cx) ?
0 : (GetHExtent().cx - GetWidth());
SetLogicalSize(max(GetSize().cx, GetHExtent().cx), GetHExtent().cy);
}
}
switch(m_eState)
{
case STATE_START_DELAY:
if (m_dwEllapsedTime > m_dwStartDelay)
{
m_eState = STATE_SCROLL;
m_dwEllapsedTime = 0;
m_dwLastUpdate = GetTickCount();
}
break;
case STATE_END_DELAY:
if (m_dwEllapsedTime > m_dwEndDelay)
{
if (m_bRepeat)
{
ResetUpdate();
break;
}
m_dwEllapsedTime = 0;
m_dwLastUpdate = GetTickCount();
m_eState = STATE_DONE;
}
break;
case STATE_SCROLL:
{
// TODO: add some anti-aliasing on the movement
// how much time has ellapsed?
// given the speed, what is the total displacement?
float fDistance = (float)(m_dwSpeed * m_dwEllapsedTime) / 1000.0f;
m_fTotalDistance += fDistance;
// we dont want the total distnace exceed our scrolling distance
int nTotalOffset = min((int)m_fTotalDistance, m_nScrollingDistance);
if (SCROLL_VERT == m_eScrollDir)
{
SetLogicalOrigin(GetLogicalOrigin().x, -1 * nTotalOffset);
}
else
{
SetLogicalOrigin(-1 * nTotalOffset, GetLogicalOrigin().y);
}
m_dwLastUpdate = GetTickCount();
if (nTotalOffset == m_nScrollingDistance)
{
m_eState = STATE_END_DELAY;
}
}
break;
case STATE_DONE:
break;
default:
break;
}
CLCDText::OnDraw(rGfx);
}
