// MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
#define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
+// ----------------------------------------------------------------------------
+// macros for logical <-> device coords conversion
+// ----------------------------------------------------------------------------
+
+/*
+ We currently let Windows do all the translations itself so these macros are
+ not really needed (any more) but keep them to enhance readability of the
+ code by allowing to see where are the logical and where are the device
+ coordinates used.
+ */
+
+// logical to device
+#define XLOG2DEV(x) (x)
+#define YLOG2DEV(y) (y)
+
+// device to logical
+#define XDEV2LOG(x) (x)
+#define YDEV2LOG(y) (y)
+
// ---------------------------------------------------------------------------
// private functions
// ---------------------------------------------------------------------------
wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
{
- if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE )
+ const wxBrush& brush = dc.GetBrush();
+ if ( brush.Ok() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
{
HDC hdc = GetHdcOf(dc);
m_colFgOld = ::GetTextColor(hdc);
m_bOwnsDC = FALSE;
m_hDC = 0;
-
- m_windowExtX = VIEWPORT_EXTENT;
- m_windowExtY = VIEWPORT_EXTENT;
}
-
wxDC::~wxDC()
{
if ( m_hDC != 0 )
#endif
RECT rect;
- GetClipBox(GetHdc(), &rect);
+ ::GetClipBox(GetHdc(), &rect);
m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
}
-void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+void wxDC::SetClippingHrgn(WXHRGN hrgn)
{
+ wxCHECK_RET( hrgn, wxT("invalid clipping region") );
+
#ifdef __WXMICROWIN__
- if (!GetHDC()) return;
-#endif
+ if (!GetHdc()) return;
+#endif // __WXMICROWIN__
+
+ // note that we combine the new clipping region with the existing one: this
+ // is compatible with what the other ports do and is the documented
+ // behaviour now (starting with 2.3.3)
+#ifdef __WIN16__
+ RECT rectClip;
+ if ( !::GetClipBox(GetHdc(), &rectClip) )
+ return;
+
+ HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
+ HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
+ rectClip.right, rectClip.bottom);
+
+ if ( ::CombineRgn(hrgnDest, hrgnClipOld, (HRGN)hrgn, RGN_AND) != ERROR )
+ {
+ ::SelectClipRgn(GetHdc(), hrgnDest);
+ }
+
+ ::DeleteObject(hrgnClipOld);
+ ::DeleteObject(hrgnDest);
+#else // Win32
+ if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
+ {
+ wxLogLastError(_T("ExtSelectClipRgn"));
+
+ return;
+ }
+#endif // Win16/32
m_clipping = TRUE;
+ UpdateClipBox();
+}
+
+void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+{
// the region coords are always the device ones, so do the translation
// manually
//
}
else
{
- if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
- {
- wxLogLastError(_T("SelectClipRgn"));
- }
- DeleteObject(hrgn);
+ SetClippingHrgn((WXHRGN)hrgn);
- UpdateClipBox();
+ ::DeleteObject(hrgn);
}
}
void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
{
-#ifdef __WXMICROWIN__
- if (!GetHDC()) return;
-#endif
-
- wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
-
- m_clipping = TRUE;
-
-#ifdef __WIN16__
- SelectClipRgn(GetHdc(), GetHrgnOf(region));
-#else // Win32
- ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
-#endif // Win16/32
-
- UpdateClipBox();
+ SetClippingHrgn(region.GetHRGN());
}
void wxDC::DestroyClippingRegion()
if (m_clipping && m_hDC)
{
// TODO: this should restore the previous clipping region,
- // so that OnPaint processing works correctly, and the update clipping region
- // doesn't get destroyed after the first DestroyClippingRegion.
+ // so that OnPaint processing works correctly, and the update
+ // clipping region doesn't get destroyed after the first
+ // DestroyClippingRegion.
HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
- SelectClipRgn(GetHdc(), rgn);
- DeleteObject(rgn);
+ ::SelectClipRgn(GetHdc(), rgn);
+ ::DeleteObject(rgn);
}
m_clipping = FALSE;
(void) ::SetMapMode(GetHdc(), MM_TEXT);
- DWORD colour = GetBkColor(GetHdc());
- HBRUSH brush = CreateSolidBrush(colour);
- FillRect(GetHdc(), &rect, brush);
- DeleteObject(brush);
+ DWORD colour = ::GetBkColor(GetHdc());
+ HBRUSH brush = ::CreateSolidBrush(colour);
+ ::FillRect(GetHdc(), &rect, brush);
+ ::DeleteObject(brush);
+
+ int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
+ height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
::SetMapMode(GetHdc(), MM_ANISOTROPIC);
::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
- ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
+ ::SetWindowExtEx(GetHdc(), width, height, NULL);
::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
}
-void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
+bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
{
#ifdef __WXMICROWIN__
- if (!GetHDC()) return;
+ if (!GetHDC()) return FALSE;
#endif
- if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
+ bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
col.GetPixel(),
style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
- : FLOODFILLBORDER) )
+ : FLOODFILLBORDER) ) ;
+ if (!success)
{
// quoting from the MSDN docs:
//
}
CalcBoundingBox(x, y);
+
+ return success;
}
bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
(void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
(void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
- // Normalization: Windows doesn't draw the last point of the line.
- // But apparently neither does GTK+, so we take it out again.
-// (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
-
CalcBoundingBox(x1, y1);
CalcBoundingBox(x2, y2);
}
{
HDC cdc = GetHdc();
HDC hdcMem = ::CreateCompatibleDC(GetHdc());
- HBITMAP hOldBitmap = ::SelectObject(hdcMem, GetHbitmapOf(bmp));
+ HGDIOBJ hOldBitmap = ::SelectObject(hdcMem, GetHbitmapOf(bmp));
#if wxUSE_PALETTE
wxPalette *pal = bmp.GetPalette();
if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
{
- oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(pal), FALSE);
+ oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(*pal), FALSE);
::RealizePalette(hdcMem);
}
#endif // wxUSE_PALETTE
::SelectPalette(hdcMem, oldPal, FALSE);
#endif // wxUSE_PALETTE
- ::SelectObject(hdcMem, hOldBitmap);
+ ::SelectObject(hdcMem, hOldBitmap);
::DeleteDC(hdcMem);
}
wxPalette *pal = bmp.GetPalette();
if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
{
- oldPal = ::SelectPalette(memdc, GetHpaletteOf(pal), FALSE);
+ oldPal = ::SelectPalette(memdc, GetHpaletteOf(*pal), FALSE);
::RealizePalette(memdc);
}
#endif // wxUSE_PALETTE
- HBITMAP hOldBitmap = ::SelectObject( memdc, hbitmap );
+ HGDIOBJ hOldBitmap = ::SelectObject( memdc, hbitmap );
::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
#if wxUSE_PALETTE
#if wxUSE_PALETTE
-void wxDC::SetPalette(const wxPalette& palette)
+void wxDC::DoSelectPalette(bool realize)
{
#ifdef __WXMICROWIN__
if (!GetHDC()) return;
m_oldPalette = 0;
}
- m_palette = palette;
-
- if (!m_palette.Ok())
+ if ( m_palette.Ok() )
{
- // Setting a NULL colourmap is a way of restoring
- // the original colourmap
- if (m_oldPalette)
- {
- ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE);
- m_oldPalette = 0;
- }
+ HPALETTE oldPal = ::SelectPalette(GetHdc(),
+ GetHpaletteOf(m_palette),
+ FALSE);
+ if (!m_oldPalette)
+ m_oldPalette = (WXHPALETTE) oldPal;
- return;
+ if (realize)
+ ::RealizePalette(GetHdc());
}
+}
- if (m_palette.Ok() && m_palette.GetHPALETTE())
+void wxDC::SetPalette(const wxPalette& palette)
+{
+ if ( palette.Ok() )
{
- HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), FALSE);
- if (!m_oldPalette)
- m_oldPalette = (WXHPALETTE) oldPal;
+ m_palette = palette;
+ DoSelectPalette(TRUE);
+ }
+}
+
+void wxDC::InitializePalette()
+{
+ if ( wxDisplayDepth() <= 8 )
+ {
+ // look for any window or parent that has a custom palette. If any has
+ // one then we need to use it in drawing operations
+ wxWindow *win = m_canvas->GetAncestorWithCustomPalette();
- ::RealizePalette(GetHdc());
+ m_hasCustomPalette = win && win->HasCustomPalette();
+ if ( m_hasCustomPalette )
+ {
+ m_palette = win->GetPalette();
+
+ // turn on MSW translation for this palette
+ DoSelectPalette();
+ }
}
}
if ( stipple && stipple->Ok() )
{
#ifdef __WIN32__
- ::SetBrushOrgEx(GetHdc(),
+ ::SetBrushOrgEx(GetHdc(),
m_deviceOriginX % stipple->GetWidth(),
m_deviceOriginY % stipple->GetHeight(),
NULL); // don't need previous brush origin
#else
- ::SetBrushOrg(GetHdc(),
+ ::SetBrushOrg(GetHdc(),
m_deviceOriginX % stipple->GetWidth(),
m_deviceOriginY % stipple->GetHeight());
#endif
// SetBackgroundColour now only refers to text background
// and m_backgroundMode is used there
-
-/*
- if (m_backgroundMode == wxTRANSPARENT)
- ::SetBkMode(GetHdc(), TRANSPARENT);
- else
- ::SetBkMode(GetHdc(), OPAQUE);
- Last change: AC 29 Jan 101 8:54 pm
-*/
}
void wxDC::SetLogicalFunction(int function)
GetTextMetrics(GetHdc(), &lpTextMetric);
- return YDEV2LOGREL(lpTextMetric.tmHeight);
+ return lpTextMetric.tmHeight;
}
wxCoord wxDC::GetCharWidth() const
GetTextMetrics(GetHdc(), &lpTextMetric);
- return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
+ return lpTextMetric.tmAveCharWidth;
}
void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
#ifdef __WXMICROWIN__
if (!GetHDC())
{
- if (x) *x = 0;
- if (y) *y = 0;
- if (descent) *descent = 0;
- if (externalLeading) *externalLeading = 0;
- return;
+ if (x) *x = 0;
+ if (y) *y = 0;
+ if (descent) *descent = 0;
+ if (externalLeading) *externalLeading = 0;
+ return;
}
-#endif
+#endif // __WXMICROWIN__
HFONT hfontOld;
if ( font )
GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
GetTextMetrics(GetHdc(), &tm);
- if (x) *x = XDEV2LOGREL(sizeRect.cx);
- if (y) *y = YDEV2LOGREL(sizeRect.cy);
- if (descent) *descent = tm.tmDescent;
- if (externalLeading) *externalLeading = tm.tmExternalLeading;
+ if (x)
+ *x = sizeRect.cx;
+ if (y)
+ *y = sizeRect.cy;
+ if (descent)
+ *descent = tm.tmDescent;
+ if (externalLeading)
+ *externalLeading = tm.tmExternalLeading;
if ( hfontOld )
{
m_mappingMode = mode;
- int pixel_width = 0;
- int pixel_height = 0;
- int mm_width = 0;
- int mm_height = 0;
-
- pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
- pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
- mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
- mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
-
- if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
+ if ( mode == wxMM_TEXT )
{
- return;
+ m_logicalScaleX =
+ m_logicalScaleY = 1.0;
}
-
- double mm2pixelsX = pixel_width/mm_width;
- double mm2pixelsY = pixel_height/mm_height;
-
- switch (mode)
+ else // need to do some calculations
{
- case wxMM_TWIPS:
- {
- m_logicalScaleX = (twips2mm * mm2pixelsX);
- m_logicalScaleY = (twips2mm * mm2pixelsY);
- break;
- }
- case wxMM_POINTS:
- {
- m_logicalScaleX = (pt2mm * mm2pixelsX);
- m_logicalScaleY = (pt2mm * mm2pixelsY);
- break;
- }
- case wxMM_METRIC:
- {
- m_logicalScaleX = mm2pixelsX;
- m_logicalScaleY = mm2pixelsY;
- break;
- }
- case wxMM_LOMETRIC:
+ int pixel_width = ::GetDeviceCaps(GetHdc(), HORZRES),
+ pixel_height = ::GetDeviceCaps(GetHdc(), VERTRES),
+ mm_width = ::GetDeviceCaps(GetHdc(), HORZSIZE),
+ mm_height = ::GetDeviceCaps(GetHdc(), VERTSIZE);
+
+ if ( (mm_width == 0) || (mm_height == 0) )
{
- m_logicalScaleX = (mm2pixelsX/10.0);
- m_logicalScaleY = (mm2pixelsY/10.0);
- break;
+ // we can't calculate mm2pixels[XY] then!
+ return;
}
- default:
- case wxMM_TEXT:
+
+ double mm2pixelsX = pixel_width / mm_width,
+ mm2pixelsY = pixel_height / mm_height;
+
+ switch (mode)
{
- m_logicalScaleX = 1.0;
- m_logicalScaleY = 1.0;
- break;
+ case wxMM_TWIPS:
+ m_logicalScaleX = twips2mm * mm2pixelsX;
+ m_logicalScaleY = twips2mm * mm2pixelsY;
+ break;
+
+ case wxMM_POINTS:
+ m_logicalScaleX = pt2mm * mm2pixelsX;
+ m_logicalScaleY = pt2mm * mm2pixelsY;
+ break;
+
+ case wxMM_METRIC:
+ m_logicalScaleX = mm2pixelsX;
+ m_logicalScaleY = mm2pixelsY;
+ break;
+
+ case wxMM_LOMETRIC:
+ m_logicalScaleX = mm2pixelsX / 10.0;
+ m_logicalScaleY = mm2pixelsY / 10.0;
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unknown mapping mode in SetMapMode") );
}
}
- if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
- ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
+ // VZ: it seems very wasteful to always use MM_ANISOTROPIC when in 99% of
+ // cases we could do with MM_TEXT and in the remaining 0.9% with
+ // MM_ISOTROPIC (TODO!)
+ ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
- SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
- m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
- m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
- ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
- ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
- ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
+ int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
+ height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
+
+ ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
+ ::SetWindowExtEx(GetHdc(), width, height, NULL);
+
+ ::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
+ ::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL);
}
void wxDC::SetUserScale(double x, double y)
if (!GetHDC()) return;
#endif
+ if ( x == m_userScaleX && y == m_userScaleY )
+ return;
+
m_userScaleX = x;
m_userScaleY = y;
if (!GetHDC()) return;
#endif
- m_signX = xLeftRight ? 1 : -1;
- m_signY = yBottomUp ? -1 : 1;
+ int signX = xLeftRight ? 1 : -1,
+ signY = yBottomUp ? -1 : 1;
- SetMapMode(m_mappingMode);
+ if ( signX != m_signX || signY != m_signY )
+ {
+ m_signX = signX;
+ m_signY = signY;
+
+ SetMapMode(m_mappingMode);
+ }
}
void wxDC::SetSystemScale(double x, double y)
if (!GetHDC()) return;
#endif
+ if ( x == m_scaleX && y == m_scaleY )
+ return;
+
m_scaleX = x;
m_scaleY = y;
if (!GetHDC()) return;
#endif
+ if ( x == m_logicalOriginX && y == m_logicalOriginY )
+ return;
+
m_logicalOriginX = x;
m_logicalOriginY = y;
if (!GetHDC()) return;
#endif
+ if ( x == m_deviceOriginX && y == m_deviceOriginY )
+ return;
+
m_deviceOriginX = x;
m_deviceOriginY = y;
wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
{
- double xRel = x - m_deviceOriginX;
- xRel /= m_logicalScaleX*m_userScaleX*m_signX*m_scaleX;
- return (wxCoord)(xRel + m_logicalOriginX);
+ return DeviceToLogicalXRel(x - m_deviceOriginX)*m_signX + m_logicalOriginX;
}
wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
{
- return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
+ // axis orientation is not taken into account for conversion of a distance
+ return (wxCoord)(x / (m_logicalScaleX*m_userScaleX*m_scaleX));
}
wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
{
- double yRel = y - m_deviceOriginY;
- yRel /= m_logicalScaleY*m_userScaleY*m_signY*m_scaleY;
- return (wxCoord)(yRel + m_logicalOriginY);
+ return DeviceToLogicalYRel(y - m_deviceOriginY)*m_signY + m_logicalOriginY;
}
wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
{
- return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
+ // axis orientation is not taken into account for conversion of a distance
+ return (wxCoord)( y / (m_logicalScaleY*m_userScaleY*m_scaleY));
}
wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
{
- return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
+ return LogicalToDeviceXRel(x - m_logicalOriginX)*m_signX + m_deviceOriginX;
}
wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
{
- return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
+ // axis orientation is not taken into account for conversion of a distance
+ return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_scaleX);
}
wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
{
- return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
+ return LogicalToDeviceYRel(y - m_logicalOriginY)*m_signY + m_deviceOriginY;
}
wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
{
- return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
+ // axis orientation is not taken into account for conversion of a distance
+ return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_scaleY);
}
// ---------------------------------------------------------------------------
dc_buffer = ::CreateCompatibleDC(GetHdc());
buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
#endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING
- HBITMAP hOldMaskBitmap = ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
- HBITMAP hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap);
+ HGDIOBJ hOldMaskBitmap = ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
+ HGDIOBJ hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap);
// copy dest to buffer
if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
if (!GetHDC()) return;
#endif
- if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
- if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
+ // if we implement it in terms of DoGetSize() instead of directly using the
+ // results returned by GetDeviceCaps(HORZ/VERTSIZE) as was done before, it
+ // will also work for wxWindowDC and wxClientDC even though their size is
+ // not the same as the total size of the screen
+ int wPixels, hPixels;
+ DoGetSize(&wPixels, &hPixels);
+
+ if ( w )
+ {
+ int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES);
+
+ wxCHECK_RET( wTotal, _T("0 width device?") );
+
+ *w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal;
+ }
+
+ if ( h )
+ {
+ int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES);
+
+ wxCHECK_RET( hTotal, _T("0 height device?") );
+
+ *h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal;
+ }
}
wxSize wxDC::GetPPI() const
projects / wxWidgets.git / blobdiff