void CFilePreviewCtrl::DrawTextLine(HDC hdc, DWORD nLineNo)
{
CRect rcClient;
GetClientRect(&rcClient);
DWORD dwOffset = 0;
DWORD dwLength = 0;
{
CAutoLock lock(&m_csLock);
dwOffset = m_aTextLines[nLineNo];
if(nLineNo==m_uNumLines-1)
dwLength = (DWORD)m_fm.GetSize() - dwOffset;
else
dwLength = m_aTextLines[nLineNo+1]-dwOffset-1;
}
if(dwLength==0)
return;
//get data from our file mapping
LPBYTE ptr = m_fm.CreateView(dwOffset, dwLength);
//draw this line to the screen
CRect rcText;
rcText.left = -(int)(m_nHScrollPos * m_xChar);
rcText.top = (nLineNo - m_nVScrollPos) * m_yChar;
rcText.right = rcClient.right;
rcText.bottom = rcText.top + m_yChar;
DRAWTEXTPARAMS params;
memset(¶ms, 0, sizeof(DRAWTEXTPARAMS));
params.cbSize = sizeof(DRAWTEXTPARAMS);
params.iTabLength = m_xChar*m_cchTabLength;
DWORD dwFlags = DT_LEFT|DT_TOP|DT_SINGLELINE|DT_NOPREFIX|DT_EXPANDTABS;
if(m_TextEncoding==ENC_UTF8)
{
// Decode line
strconv_t strconv;
LPCWSTR szLine = strconv.utf82w((char*)ptr, dwLength-1);
DrawTextExW(hdc, (LPWSTR)szLine, -1, &rcText, dwFlags, ¶ms);
}
else if(m_TextEncoding==ENC_UTF16_LE)
{
DrawTextExW(hdc, (WCHAR*)ptr, dwLength/2-1, &rcText,
dwFlags, ¶ms);
}
else if(m_TextEncoding==ENC_UTF16_BE)
{
// Decode line
strconv_t strconv;
LPCWSTR szLine = strconv.w2w_be((WCHAR*)ptr, dwLength/2-1);
DrawTextExW(hdc, (LPWSTR)szLine, -1, &rcText, dwFlags, ¶ms);
}
else // ASCII
{
DrawTextExA(hdc, (char*)ptr, dwLength-1, &rcText,
dwFlags, ¶ms);
}
}
/***********************************************************************
* DrawTextExA (USER32.@)
*
* If DT_MODIFYSTRING is specified then there must be room for up to
* 4 extra characters. We take great care about just how much modified
* string we return.
*/
INT WINAPI DrawTextExA( HDC hdc, LPSTR str, INT count,
LPRECT rect, UINT flags, LPDRAWTEXTPARAMS dtp )
{
WCHAR *wstr;
WCHAR *p;
INT ret = 0;
int i;
DWORD wcount;
DWORD wmax;
DWORD amax;
UINT cp;
if (!count) return 0;
if( !str || ((count == -1) && !(count = strlen(str))))
{
if( flags & DT_CALCRECT)
{
rect->right = rect->left;
rect->bottom = rect->top;
}
return 0;
}
cp = GdiGetCodePage( hdc );
wcount = MultiByteToWideChar( cp, 0, str, count, NULL, 0 );
wmax = wcount;
amax = count;
if (flags & DT_MODIFYSTRING)
{
wmax += 4;
amax += 4;
}
wstr = HeapAlloc(GetProcessHeap(), 0, wmax * sizeof(WCHAR));
if (wstr)
{
MultiByteToWideChar( cp, 0, str, count, wstr, wcount );
if (flags & DT_MODIFYSTRING)
for (i=4, p=wstr+wcount; i--; p++) *p=0xFFFE;
/* Initialise the extra characters so that we can see which ones
* change. U+FFFE is guaranteed to be not a unicode character and
* so will not be generated by DrawTextEx itself.
*/
ret = DrawTextExW( hdc, wstr, wcount, rect, flags, dtp );
if (flags & DT_MODIFYSTRING)
{
/* Unfortunately the returned string may contain multiple \0s
* and so we need to measure it ourselves.
*/
for (i=4, p=wstr+wcount; i-- && *p != 0xFFFE; p++) wcount++;
WideCharToMultiByte( cp, 0, wstr, wcount, str, amax, NULL, NULL );
}
HeapFree(GetProcessHeap(), 0, wstr);
}
return ret;
}
// TODO alter this so that only the visible columns are redrawn
// TODO this means rename controlSize to clientRect
static void drawItem(struct table *t, HDC dc, intptr_t i, LONG y, LONG height, RECT controlSize)
{
RECT rsel;
HBRUSH background;
int textColor;
WCHAR msg[100];
RECT headeritem;
intptr_t j;
LRESULT xoff;
IMAGELISTDRAWPARAMS ip;
// TODO verify these two
background = (HBRUSH) (COLOR_WINDOW + 1);
textColor = COLOR_WINDOWTEXT;
if (t->selected == i) {
// these are the colors wine uses (http://source.winehq.org/source/dlls/comctl32/listview.c)
// the two for unfocused are also suggested by http://stackoverflow.com/questions/10428710/windows-forms-inactive-highlight-color
background = (HBRUSH) (COLOR_HIGHLIGHT + 1);
textColor = COLOR_HIGHLIGHTTEXT;
if (GetFocus() != t->hwnd) {
background = (HBRUSH) (COLOR_BTNFACE + 1);
textColor = COLOR_BTNTEXT;
}
}
// first fill the selection rect
// note that this already only draws the visible area
rsel.left = controlSize.left;
rsel.top = y;
rsel.right = controlSize.right - controlSize.left;
rsel.bottom = y + height;
if (FillRect(dc, &rsel, background) == 0)
abort();
xoff = SendMessageW(t->header, HDM_GETBITMAPMARGIN, 0, 0);
// now adjust for horizontal scrolling
xoff -= t->hpos;
// now draw the cells
if (SetTextColor(dc, GetSysColor(textColor)) == CLR_INVALID)
abort();
if (SetBkMode(dc, TRANSPARENT) == 0)
abort();
for (j = 0; j < t->nColumns; j++) {
if (SendMessageW(t->header, HDM_GETITEMRECT, (WPARAM) j, (LPARAM) (&headeritem)) == 0)
abort();
switch (t->columnTypes[j]) {
case tableColumnText:
rsel.left = headeritem.left + xoff;
rsel.top = y;
rsel.right = headeritem.right;
rsel.bottom = y + height;
// TODO vertical center in case the height is less than the icon height?
if (DrawTextExW(dc, msg, wsprintf(msg, L"Item %d", i), &rsel, DT_END_ELLIPSIS | DT_LEFT | DT_NOPREFIX | DT_SINGLELINE, NULL) == 0)
abort();
break;
case tableColumnImage:
// TODO vertically center if image is smaller than text height
// TODO same for checkboxes
ZeroMemory(&ip, sizeof (IMAGELISTDRAWPARAMS));
ip.cbSize = sizeof (IMAGELISTDRAWPARAMS);
ip.himl = t->checkboxes;//t->imagelist;
ip.i = (i%8);//0;
ip.hdcDst = dc;
ip.x = headeritem.left + xoff;
ip.y = y;
ip.cx = 0; // draw whole image
ip.cy = 0;
ip.xBitmap = 0;
ip.yBitmap = 0;
ip.rgbBk = CLR_NONE;
ip.fStyle = ILD_NORMAL | ILD_SCALE; // TODO alpha-blend; ILD_DPISCALE?
// TODO ILS_ALPHA?
if (ImageList_DrawIndirect(&ip) == 0)
abort();
break;
case tableColumnCheckbox:
// TODO replace all this
rsel.left = headeritem.left + xoff;
rsel.top = y;
rsel.right = rsel.left + t->checkboxWidth;
rsel.bottom = rsel.top + t->checkboxHeight;
if (SetDCBrushColor(dc, RGB(255, 0, 0)) == CLR_INVALID)
abort();
if (FillRect(dc, &rsel, GetStockObject(DC_BRUSH)) == 0)
abort();
break;
}
if (t->selected == i && t->focusedColumn == j) {
rsel.left = headeritem.left;
rsel.top = y;
rsel.right = headeritem.right;
rsel.bottom = y + height;
if (DrawFocusRect(dc, &rsel) == 0)
abort();
}
}
}