/////////////////////////////////////////////////////////////////////////////
-// Name: common/dcbase.cpp
+// Name: src/common/dcbase.cpp
// Purpose: generic methods of the wxDC Class
// Author: Vadim Zeitlin
// Modified by:
// Created: 05/25/99
// RCS-ID: $Id$
-// Copyright: (c) wxWindows team
+// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// declarations
// ============================================================================
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "dcbase.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#endif
#include "wx/dc.h"
+#include "wx/dcclient.h"
+#include "wx/dcmemory.h"
+#include "wx/dcscreen.h"
+#include "wx/dcprint.h"
+#include "wx/prntbase.h"
+#include "wx/scopeguard.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/math.h"
+ #include "wx/module.h"
+ #include "wx/window.h"
+#endif
-#include <math.h>
+#ifdef __WXMSW__
+ #include "wx/msw/dcclient.h"
+ #include "wx/msw/dcmemory.h"
+ #include "wx/msw/dcscreen.h"
+#endif
-// bool wxDCBase::sm_cacheing = FALSE;
+#ifdef __WXGTK20__
+ #include "wx/gtk/dcclient.h"
+ #include "wx/gtk/dcmemory.h"
+ #include "wx/gtk/dcscreen.h"
+#elif defined(__WXGTK__)
+ #include "wx/gtk1/dcclient.h"
+ #include "wx/gtk1/dcmemory.h"
+ #include "wx/gtk1/dcscreen.h"
+#endif
-// ============================================================================
-// implementation
-// ============================================================================
+#ifdef __WXMAC__
+ #include "wx/osx/dcclient.h"
+ #include "wx/osx/dcmemory.h"
+ #include "wx/osx/dcscreen.h"
+#endif
+
+#ifdef __WXPM__
+ #include "wx/os2/dcclient.h"
+ #include "wx/os2/dcmemory.h"
+ #include "wx/os2/dcscreen.h"
+#endif
+
+#ifdef __WXCOCOA__
+ #include "wx/cocoa/dcclient.h"
+ #include "wx/cocoa/dcmemory.h"
+ #include "wx/cocoa/dcscreen.h"
+#endif
+
+#ifdef __WXMOTIF__
+ #include "wx/motif/dcclient.h"
+ #include "wx/motif/dcmemory.h"
+ #include "wx/motif/dcscreen.h"
+#endif
+
+#ifdef __WXX11__
+ #include "wx/x11/dcclient.h"
+ #include "wx/x11/dcmemory.h"
+ #include "wx/x11/dcscreen.h"
+#endif
+
+#ifdef __WXDFB__
+ #include "wx/dfb/dcclient.h"
+ #include "wx/dfb/dcmemory.h"
+ #include "wx/dfb/dcscreen.h"
+#endif
+
+#ifdef __WXPALMOS__
+ #include "wx/palmos/dcclient.h"
+ #include "wx/palmos/dcmemory.h"
+ #include "wx/palmos/dcscreen.h"
+#endif
+
+//----------------------------------------------------------------------------
+// wxDCFactory
+//----------------------------------------------------------------------------
+
+wxDCFactory *wxDCFactory::m_factory = NULL;
+
+void wxDCFactory::Set(wxDCFactory *factory)
+{
+ delete m_factory;
+
+ m_factory = factory;
+}
+
+wxDCFactory *wxDCFactory::Get()
+{
+ if ( !m_factory )
+ m_factory = new wxNativeDCFactory;
+
+ return m_factory;
+}
+
+class wxDCFactoryCleanupModule : public wxModule
+{
+public:
+ virtual bool OnInit() { return true; }
+ virtual void OnExit() { wxDCFactory::Set(NULL); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxDCFactoryCleanupModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxDCFactoryCleanupModule, wxModule)
+
+//-----------------------------------------------------------------------------
+// wxNativeDCFactory
+//-----------------------------------------------------------------------------
+
+wxDCImpl* wxNativeDCFactory::CreateWindowDC( wxWindowDC *owner, wxWindow *window )
+{
+ wxDCImpl * const impl = new wxWindowDCImpl( owner, window );
+ impl->InheritAttributes(window);
+ return impl;
+}
+
+wxDCImpl* wxNativeDCFactory::CreateClientDC( wxClientDC *owner, wxWindow *window )
+{
+ wxDCImpl * const impl = new wxClientDCImpl( owner, window );
+ impl->InheritAttributes(window);
+ return impl;
+}
+
+wxDCImpl* wxNativeDCFactory::CreatePaintDC( wxPaintDC *owner, wxWindow *window )
+{
+ wxDCImpl * const impl = new wxPaintDCImpl( owner, window );
+ impl->InheritAttributes(window);
+ return impl;
+}
+
+wxDCImpl* wxNativeDCFactory::CreateMemoryDC( wxMemoryDC *owner )
+{
+ return new wxMemoryDCImpl( owner );
+}
+
+wxDCImpl* wxNativeDCFactory::CreateMemoryDC(wxMemoryDC *owner, wxBitmap& bitmap)
+{
+ // the bitmap may be modified when it's selected into a memory DC so make
+ // sure changing this bitmap doesn't affect any other shallow copies of it
+ // (see wxMemoryDC::SelectObject())
+ //
+ // notice that we don't provide any ctor equivalent to SelectObjectAsSource
+ // method because this should be rarely needed and easy to work around by
+ // using the default ctor and calling SelectObjectAsSource itself
+ if ( bitmap.IsOk() )
+ bitmap.UnShare();
+
+ return new wxMemoryDCImpl(owner, bitmap);
+}
+
+wxDCImpl* wxNativeDCFactory::CreateMemoryDC( wxMemoryDC *owner, wxDC *dc )
+{
+ return new wxMemoryDCImpl( owner, dc );
+}
+
+wxDCImpl* wxNativeDCFactory::CreateScreenDC( wxScreenDC *owner )
+{
+ return new wxScreenDCImpl( owner );
+}
+
+#if wxUSE_PRINTING_ARCHITECTURE
+wxDCImpl *wxNativeDCFactory::CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data )
+{
+ wxPrintFactory *factory = wxPrintFactory::GetFactory();
+ return factory->CreatePrinterDCImpl( owner, data );
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// wxWindowDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxWindowDC, wxDC)
+
+wxWindowDC::wxWindowDC(wxWindow *win)
+ : wxDC(wxDCFactory::Get()->CreateWindowDC(this, win))
+{
+}
+
+//-----------------------------------------------------------------------------
+// wxClientDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxClientDC, wxWindowDC)
+
+wxClientDC::wxClientDC(wxWindow *win)
+ : wxWindowDC(wxDCFactory::Get()->CreateClientDC(this, win))
+{
+}
+
+//-----------------------------------------------------------------------------
+// wxMemoryDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
+
+wxMemoryDC::wxMemoryDC()
+ : wxDC(wxDCFactory::Get()->CreateMemoryDC(this))
+{
+}
+
+wxMemoryDC::wxMemoryDC(wxBitmap& bitmap)
+ : wxDC(wxDCFactory::Get()->CreateMemoryDC(this, bitmap))
+{
+}
+
+wxMemoryDC::wxMemoryDC(wxDC *dc)
+ : wxDC(wxDCFactory::Get()->CreateMemoryDC(this, dc))
+{
+}
+
+void wxMemoryDC::SelectObject(wxBitmap& bmp)
+{
+ if ( bmp.IsSameAs(GetSelectedBitmap()) )
+ {
+ // Nothing to do, this bitmap is already selected.
+ return;
+ }
+
+ // make sure that the given wxBitmap is not sharing its data with other
+ // wxBitmap instances as its contents will be modified by any drawing
+ // operation done on this DC
+ if (bmp.IsOk())
+ bmp.UnShare();
+
+ GetImpl()->DoSelect(bmp);
+}
+
+void wxMemoryDC::SelectObjectAsSource(const wxBitmap& bmp)
+{
+ GetImpl()->DoSelect(bmp);
+}
+
+const wxBitmap& wxMemoryDC::GetSelectedBitmap() const
+{
+ return GetImpl()->GetSelectedBitmap();
+}
+
+wxBitmap& wxMemoryDC::GetSelectedBitmap()
+{
+ return GetImpl()->GetSelectedBitmap();
+}
+
+
+//-----------------------------------------------------------------------------
+// wxPaintDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxPaintDC, wxClientDC)
+
+wxPaintDC::wxPaintDC(wxWindow *win)
+ : wxClientDC(wxDCFactory::Get()->CreatePaintDC(this, win))
+{
+}
+
+//-----------------------------------------------------------------------------
+// wxScreenDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
+
+wxScreenDC::wxScreenDC()
+ : wxDC(wxDCFactory::Get()->CreateScreenDC(this))
+{
+}
+
+//-----------------------------------------------------------------------------
+// wxPrinterDC
+//-----------------------------------------------------------------------------
+
+#if wxUSE_PRINTING_ARCHITECTURE
+
+IMPLEMENT_DYNAMIC_CLASS(wxPrinterDC, wxDC)
+
+wxPrinterDC::wxPrinterDC()
+ : wxDC(wxDCFactory::Get()->CreatePrinterDC(this, wxPrintData()))
+{
+}
+
+wxPrinterDC::wxPrinterDC(const wxPrintData& data)
+ : wxDC(wxDCFactory::Get()->CreatePrinterDC(this, data))
+{
+}
+
+wxRect wxPrinterDC::GetPaperRect() const
+{
+ return GetImpl()->GetPaperRect();
+}
+
+int wxPrinterDC::GetResolution() const
+{
+ return GetImpl()->GetResolution();
+}
+
+#endif // wxUSE_PRINTING_ARCHITECTURE
+
+//-----------------------------------------------------------------------------
+// wxDCImpl
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxDCImpl, wxObject)
+
+wxDCImpl::wxDCImpl( wxDC *owner )
+ : m_window(NULL)
+ , m_colour(wxColourDisplay())
+ , m_ok(true)
+ , m_clipping(false)
+ , m_isInteractive(0)
+ , m_isBBoxValid(false)
+ , m_logicalOriginX(0), m_logicalOriginY(0)
+ , m_deviceOriginX(0), m_deviceOriginY(0)
+ , m_deviceLocalOriginX(0), m_deviceLocalOriginY(0)
+ , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
+ , m_userScaleX(1.0), m_userScaleY(1.0)
+ , m_scaleX(1.0), m_scaleY(1.0)
+ , m_signX(1), m_signY(1)
+ , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
+ , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0)
+ , m_logicalFunction(wxCOPY)
+ , m_backgroundMode(wxBRUSHSTYLE_TRANSPARENT)
+ , m_mappingMode(wxMM_TEXT)
+ , m_pen()
+ , m_brush()
+ , m_backgroundBrush()
+ , m_textForegroundColour(*wxBLACK)
+ , m_textBackgroundColour(*wxWHITE)
+ , m_font()
+#if wxUSE_PALETTE
+ , m_palette()
+ , m_hasCustomPalette(false)
+#endif // wxUSE_PALETTE
+{
+ m_owner = owner;
+
+ m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
+ (double)wxGetDisplaySizeMM().GetWidth();
+ m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
+ (double)wxGetDisplaySizeMM().GetHeight();
+
+ ResetBoundingBox();
+ ResetClipping();
+}
+
+wxDCImpl::~wxDCImpl()
+{
+}
// ----------------------------------------------------------------------------
-// special symbols
+// coordinate conversions and transforms
// ----------------------------------------------------------------------------
-void wxDCBase::DoDrawCheckMark(wxCoord x1, wxCoord y1,
+wxCoord wxDCImpl::DeviceToLogicalX(wxCoord x) const
+{
+ return wxRound( (double)((x - m_deviceOriginX - m_deviceLocalOriginX) * m_signX) / m_scaleX ) + m_logicalOriginX ;
+}
+
+wxCoord wxDCImpl::DeviceToLogicalY(wxCoord y) const
+{
+ return wxRound( (double)((y - m_deviceOriginY - m_deviceLocalOriginY) * m_signY) / m_scaleY ) + m_logicalOriginY ;
+}
+
+wxCoord wxDCImpl::DeviceToLogicalXRel(wxCoord x) const
+{
+ return wxRound((double)(x) / m_scaleX);
+}
+
+wxCoord wxDCImpl::DeviceToLogicalYRel(wxCoord y) const
+{
+ return wxRound((double)(y) / m_scaleY);
+}
+
+wxCoord wxDCImpl::LogicalToDeviceX(wxCoord x) const
+{
+ return wxRound( (double)((x - m_logicalOriginX) * m_signX) * m_scaleX) + m_deviceOriginX + m_deviceLocalOriginX;
+}
+
+wxCoord wxDCImpl::LogicalToDeviceY(wxCoord y) const
+{
+ return wxRound( (double)((y - m_logicalOriginY) * m_signY) * m_scaleY) + m_deviceOriginY + m_deviceLocalOriginY;
+}
+
+wxCoord wxDCImpl::LogicalToDeviceXRel(wxCoord x) const
+{
+ return wxRound((double)(x) * m_scaleX);
+}
+
+wxCoord wxDCImpl::LogicalToDeviceYRel(wxCoord y) const
+{
+ return wxRound((double)(y) * m_scaleY);
+}
+
+void wxDCImpl::ComputeScaleAndOrigin()
+{
+ m_scaleX = m_logicalScaleX * m_userScaleX;
+ m_scaleY = m_logicalScaleY * m_userScaleY;
+}
+
+void wxDCImpl::SetMapMode( wxMappingMode mode )
+{
+ switch (mode)
+ {
+ case wxMM_TWIPS:
+ SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
+ break;
+ case wxMM_POINTS:
+ SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
+ break;
+ case wxMM_METRIC:
+ SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
+ break;
+ case wxMM_LOMETRIC:
+ SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
+ break;
+ default:
+ case wxMM_TEXT:
+ SetLogicalScale( 1.0, 1.0 );
+ break;
+ }
+ m_mappingMode = mode;
+}
+
+void wxDCImpl::SetUserScale( double x, double y )
+{
+ // allow negative ? -> no
+ m_userScaleX = x;
+ m_userScaleY = y;
+ ComputeScaleAndOrigin();
+}
+
+void wxDCImpl::SetLogicalScale( double x, double y )
+{
+ // allow negative ?
+ m_logicalScaleX = x;
+ m_logicalScaleY = y;
+ ComputeScaleAndOrigin();
+}
+
+void wxDCImpl::SetLogicalOrigin( wxCoord x, wxCoord y )
+{
+ m_logicalOriginX = x * m_signX;
+ m_logicalOriginY = y * m_signY;
+ ComputeScaleAndOrigin();
+}
+
+void wxDCImpl::SetDeviceOrigin( wxCoord x, wxCoord y )
+{
+ m_deviceOriginX = x;
+ m_deviceOriginY = y;
+ ComputeScaleAndOrigin();
+}
+
+void wxDCImpl::SetDeviceLocalOrigin( wxCoord x, wxCoord y )
+{
+ m_deviceLocalOriginX = x;
+ m_deviceLocalOriginY = y;
+ ComputeScaleAndOrigin();
+}
+
+void wxDCImpl::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
+{
+ // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
+ // wxWidgets 2.9: no longer override it
+ m_signX = (xLeftRight ? 1 : -1);
+ m_signY = (yBottomUp ? -1 : 1);
+ ComputeScaleAndOrigin();
+}
+
+
+// Each element of the widths array will be the width of the string up to and
+// including the corresponding character in text. This is the generic
+// implementation, the port-specific classes should do this with native APIs
+// if available and if faster. Note: pango_layout_index_to_pos is much slower
+// than calling GetTextExtent!!
+
+#define FWC_SIZE 256
+
+class FontWidthCache
+{
+public:
+ FontWidthCache() : m_scaleX(1), m_widths(NULL) { }
+ ~FontWidthCache() { delete []m_widths; }
+
+ void Reset()
+ {
+ if (!m_widths)
+ m_widths = new int[FWC_SIZE];
+
+ memset(m_widths, 0, sizeof(int)*FWC_SIZE);
+ }
+
+ wxFont m_font;
+ double m_scaleX;
+ int *m_widths;
+};
+
+static FontWidthCache s_fontWidthCache;
+
+bool wxDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+{
+ int totalWidth = 0;
+
+ const size_t len = text.length();
+ widths.Empty();
+ widths.Add(0, len);
+
+ // reset the cache if font or horizontal scale have changed
+ if ( !s_fontWidthCache.m_widths ||
+ !wxIsSameDouble(s_fontWidthCache.m_scaleX, m_scaleX) ||
+ (s_fontWidthCache.m_font != GetFont()) )
+ {
+ s_fontWidthCache.Reset();
+ s_fontWidthCache.m_font = GetFont();
+ s_fontWidthCache.m_scaleX = m_scaleX;
+ }
+
+ // Calculate the position of each character based on the widths of
+ // the previous characters
+ int w, h;
+ for ( size_t i = 0; i < len; i++ )
+ {
+ const wxChar c = text[i];
+ unsigned int c_int = (unsigned int)c;
+
+ if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
+ {
+ w = s_fontWidthCache.m_widths[c_int];
+ }
+ else
+ {
+ DoGetTextExtent(c, &w, &h);
+ if (c_int < FWC_SIZE)
+ s_fontWidthCache.m_widths[c_int] = w;
+ }
+
+ totalWidth += w;
+ widths[i] = totalWidth;
+ }
+
+ return true;
+}
+
+void wxDCImpl::GetMultiLineTextExtent(const wxString& text,
+ wxCoord *x,
+ wxCoord *y,
+ wxCoord *h,
+ const wxFont *font) const
+{
+ wxCoord widthTextMax = 0, widthLine,
+ heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
+
+ wxString curLine;
+ for ( wxString::const_iterator pc = text.begin(); ; ++pc )
+ {
+ if ( pc == text.end() || *pc == wxT('\n') )
+ {
+ if ( curLine.empty() )
+ {
+ // we can't use GetTextExtent - it will return 0 for both width
+ // and height and an empty line should count in height
+ // calculation
+
+ // assume that this line has the same height as the previous
+ // one
+ if ( !heightLineDefault )
+ heightLineDefault = heightLine;
+
+ if ( !heightLineDefault )
+ {
+ // but we don't know it yet - choose something reasonable
+ DoGetTextExtent(wxT("W"), NULL, &heightLineDefault,
+ NULL, NULL, font);
+ }
+
+ heightTextTotal += heightLineDefault;
+ }
+ else
+ {
+ DoGetTextExtent(curLine, &widthLine, &heightLine,
+ NULL, NULL, font);
+ if ( widthLine > widthTextMax )
+ widthTextMax = widthLine;
+ heightTextTotal += heightLine;
+ }
+
+ if ( pc == text.end() )
+ {
+ break;
+ }
+ else // '\n'
+ {
+ curLine.clear();
+ }
+ }
+ else
+ {
+ curLine += *pc;
+ }
+ }
+
+ if ( x )
+ *x = widthTextMax;
+ if ( y )
+ *y = heightTextTotal;
+ if ( h )
+ *h = heightLine;
+}
+
+void wxDCImpl::DoDrawCheckMark(wxCoord x1, wxCoord y1,
wxCoord width, wxCoord height)
{
- wxCHECK_RET( Ok(), wxT("invalid window dc") );
+ wxCHECK_RET( IsOk(), wxT("invalid window dc") );
wxCoord x2 = x1 + width,
y2 = y1 + height;
- // this is to yield width of 3 for width == height == 10
- SetPen(wxPen(GetTextForeground(), (width + height + 1) / 7, wxSOLID));
+ // the pen width is calibrated to give 3 for width == height == 10
+ wxDCPenChanger pen( *m_owner, wxPen(GetTextForeground(), (width + height + 1)/7));
// we're drawing a scaled version of wx/generic/tick.xpm here
wxCoord x3 = x1 + (4*width) / 10, // x of the tick bottom
CalcBoundingBox(x2, y2);
}
-// ----------------------------------------------------------------------------
-// line/polygons
-// ----------------------------------------------------------------------------
+bool
+wxDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
+ wxCoord dstWidth, wxCoord dstHeight,
+ wxDC *source,
+ wxCoord xsrc, wxCoord ysrc,
+ wxCoord srcWidth, wxCoord srcHeight,
+ wxRasterOperationMode rop,
+ bool useMask,
+ wxCoord xsrcMask,
+ wxCoord ysrcMask)
+{
+ wxCHECK_MSG( srcWidth && srcHeight && dstWidth && dstHeight, false,
+ wxT("invalid blit size") );
+
+ // emulate the stretching by modifying the DC scale
+ double xscale = (double)srcWidth/dstWidth,
+ yscale = (double)srcHeight/dstHeight;
+
+ double xscaleOld, yscaleOld;
+ GetUserScale(&xscaleOld, &yscaleOld);
+ SetUserScale(xscaleOld/xscale, yscaleOld/yscale);
-void wxDCBase::DrawLines(const wxList *list, wxCoord xoffset, wxCoord yoffset)
+ bool rc = DoBlit(wxCoord(xdest*xscale), wxCoord(ydest*yscale),
+ wxCoord(dstWidth*xscale), wxCoord(dstHeight*yscale),
+ source,
+ xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
+
+ SetUserScale(xscaleOld, yscaleOld);
+
+ return rc;
+}
+
+void wxDCImpl::DrawLines(const wxPointList *list, wxCoord xoffset, wxCoord yoffset)
{
int n = list->GetCount();
wxPoint *points = new wxPoint[n];
int i = 0;
- for ( wxList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
+ for ( wxPointList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
{
- wxPoint *point = (wxPoint *)node->GetData();
+ wxPoint *point = node->GetData();
points[i].x = point->x;
points[i].y = point->y;
}
delete [] points;
}
-
-void wxDCBase::DrawPolygon(const wxList *list,
+void wxDCImpl::DrawPolygon(const wxPointList *list,
wxCoord xoffset, wxCoord yoffset,
- int fillStyle)
+ wxPolygonFillMode fillStyle)
{
int n = list->GetCount();
wxPoint *points = new wxPoint[n];
int i = 0;
- for ( wxList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
+ for ( wxPointList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
{
- wxPoint *point = (wxPoint *)node->GetData();
+ wxPoint *point = node->GetData();
points[i].x = point->x;
points[i].y = point->y;
}
delete [] points;
}
-// ----------------------------------------------------------------------------
-// splines
-// ----------------------------------------------------------------------------
-
-#if wxUSE_SPLINES
-
-// TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?)
-void wxDCBase::DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3)
+void
+wxDCImpl::DoDrawPolyPolygon(int n,
+ int count[],
+ wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset,
+ wxPolygonFillMode fillStyle)
{
- wxList point_list;
-
- wxPoint *point1 = new wxPoint;
- point1->x = x1; point1->y = y1;
- point_list.Append((wxObject*)point1);
+ if ( n == 1 )
+ {
+ DoDrawPolygon(count[0], points, xoffset, yoffset, fillStyle);
+ return;
+ }
- wxPoint *point2 = new wxPoint;
- point2->x = x2; point2->y = y2;
- point_list.Append((wxObject*)point2);
+ int i, j, lastOfs;
+ wxPoint* pts;
- wxPoint *point3 = new wxPoint;
- point3->x = x3; point3->y = y3;
- point_list.Append((wxObject*)point3);
+ for (i = j = lastOfs = 0; i < n; i++)
+ {
+ lastOfs = j;
+ j += count[i];
+ }
+ pts = new wxPoint[j+n-1];
+ for (i = 0; i < j; i++)
+ pts[i] = points[i];
+ for (i = 2; i <= n; i++)
+ {
+ lastOfs -= count[n-i];
+ pts[j++] = pts[lastOfs];
+ }
- DrawSpline(&point_list);
+ {
+ wxDCPenChanger setTransp(*m_owner, *wxTRANSPARENT_PEN);
+ DoDrawPolygon(j, pts, xoffset, yoffset, fillStyle);
+ }
- for( wxList::compatibility_iterator node = point_list.GetFirst(); node; node = node->GetNext() )
+ for (i = j = 0; i < n; i++)
{
- wxPoint *p = (wxPoint *)node->GetData();
- delete p;
+ DoDrawLines(count[i], pts+j, xoffset, yoffset);
+ j += count[i];
}
+ delete[] pts;
}
-void wxDCBase::DrawSpline(int n, wxPoint points[])
+#if wxUSE_SPLINES
+
+void wxDCImpl::DrawSpline(wxCoord x1, wxCoord y1,
+ wxCoord x2, wxCoord y2,
+ wxCoord x3, wxCoord y3)
{
- wxList list;
- for (int i =0; i < n; i++)
- {
- list.Append((wxObject*)&points[i]);
- }
+ wxPoint points[] = { wxPoint(x1, y1), wxPoint(x2, y2), wxPoint(x3, y3) };
+ DrawSpline(WXSIZEOF(points), points);
+}
+
+void wxDCImpl::DrawSpline(int n, wxPoint points[])
+{
+ wxPointList list;
+ for ( int i = 0; i < n; i++ )
+ list.Append(&points[i]);
DrawSpline(&list);
}
void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
double x4, double y4);
static bool wx_spline_add_point(double x, double y);
-static void wx_spline_draw_point_array(wxDCBase *dc);
+static void wx_spline_draw_point_array(wxDC *dc);
-wxList wx_spline_point_list;
+static wxPointList wx_spline_point_list;
#define half(z1, z2) ((z1+z2)/2.0)
#define THRESHOLD 5
static bool wx_spline_add_point(double x, double y)
{
- wxPoint *point = new wxPoint ;
- point->x = (int) x;
- point->y = (int) y;
- wx_spline_point_list.Append((wxObject*)point);
- return TRUE;
+ wxPoint *point = new wxPoint( wxRound(x), wxRound(y) );
+ wx_spline_point_list.Append(point );
+ return true;
}
-static void wx_spline_draw_point_array(wxDCBase *dc)
+static void wx_spline_draw_point_array(wxDC *dc)
{
- dc->DrawLines(&wx_spline_point_list, 0, 0 );
- wxList::compatibility_iterator node = wx_spline_point_list.GetFirst();
- while (node)
- {
- wxPoint *point = (wxPoint *)node->GetData();
- delete point;
- wx_spline_point_list.Erase(node);
- node = wx_spline_point_list.GetFirst();
- }
+ dc->DrawLines(&wx_spline_point_list, 0, 0 );
+ wxPointList::compatibility_iterator node = wx_spline_point_list.GetFirst();
+ while (node)
+ {
+ wxPoint *point = node->GetData();
+ delete point;
+ wx_spline_point_list.Erase(node);
+ node = wx_spline_point_list.GetFirst();
+ }
}
-void wxDCBase::DoDrawSpline( wxList *points )
+void wxDCImpl::DoDrawSpline( const wxPointList *points )
{
- wxCHECK_RET( Ok(), wxT("invalid window dc") );
+ wxCHECK_RET( IsOk(), wxT("invalid window dc") );
wxPoint *p;
double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
double x1, y1, x2, y2;
- wxList::compatibility_iterator node = points->GetFirst();
+ wxPointList::compatibility_iterator node = points->GetFirst();
+ if (!node)
+ // empty list
+ return;
+
p = (wxPoint *)node->GetData();
x1 = p->x;
y1 = p->y;
node = node->GetNext();
- p = (wxPoint *)node->GetData();
+ p = node->GetData();
x2 = p->x;
y2 = p->y;
wx_spline_add_point(x1, y1);
while ((node = node->GetNext())
-#if !wxUSE_STL
+#if !wxUSE_STD_CONTAINERS
!= NULL
-#endif // !wxUSE_STL
+#endif // !wxUSE_STD_CONTAINERS
)
{
- p = (wxPoint *)node->GetData();
+ p = node->GetData();
x1 = x2;
y1 = y2;
x2 = p->x;
wx_spline_add_point( cx1, cy1 );
wx_spline_add_point( x2, y2 );
- wx_spline_draw_point_array( this );
+ wx_spline_draw_point_array( m_owner );
}
#endif // wxUSE_SPLINES
-// ----------------------------------------------------------------------------
-// enhanced text drawing
-// ----------------------------------------------------------------------------
-void wxDCBase::GetMultiLineTextExtent(const wxString& text,
- wxCoord *x,
- wxCoord *y,
- wxCoord *h,
- wxFont *font)
-{
- wxCoord widthTextMax = 0, widthLine,
- heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
- wxString curLine;
- for ( const wxChar *pc = text; ; pc++ )
+void wxDCImpl::DoGradientFillLinear(const wxRect& rect,
+ const wxColour& initialColour,
+ const wxColour& destColour,
+ wxDirection nDirection)
+{
+ // save old pen
+ wxPen oldPen = m_pen;
+ wxBrush oldBrush = m_brush;
+
+ wxUint8 nR1 = initialColour.Red();
+ wxUint8 nG1 = initialColour.Green();
+ wxUint8 nB1 = initialColour.Blue();
+ wxUint8 nR2 = destColour.Red();
+ wxUint8 nG2 = destColour.Green();
+ wxUint8 nB2 = destColour.Blue();
+ wxUint8 nR, nG, nB;
+
+ if ( nDirection == wxEAST || nDirection == wxWEST )
{
- if ( *pc == _T('\n') || *pc == _T('\0') )
+ wxInt32 x = rect.GetWidth();
+ wxInt32 w = x; // width of area to shade
+ wxInt32 xDelta = w/256; // height of one shade bend
+ if (xDelta < 1)
+ xDelta = 1;
+
+ while (x >= xDelta)
{
- if ( curLine.empty() )
- {
- // we can't use GetTextExtent - it will return 0 for both width
- // and height and an empty line should count in height
- // calculation
+ x -= xDelta;
+ if (nR1 > nR2)
+ nR = nR1 - (nR1-nR2)*(w-x)/w;
+ else
+ nR = nR1 + (nR2-nR1)*(w-x)/w;
- // assume that this line has the same height as the previous
- // one
- if ( !heightLineDefault )
- heightLineDefault = heightLine;
+ if (nG1 > nG2)
+ nG = nG1 - (nG1-nG2)*(w-x)/w;
+ else
+ nG = nG1 + (nG2-nG1)*(w-x)/w;
- if ( !heightLineDefault )
- {
- // but we don't know it yet - choose something reasonable
- GetTextExtent(_T("W"), NULL, &heightLineDefault,
- NULL, NULL, font);
- }
+ if (nB1 > nB2)
+ nB = nB1 - (nB1-nB2)*(w-x)/w;
+ else
+ nB = nB1 + (nB2-nB1)*(w-x)/w;
+
+ wxColour colour(nR,nG,nB);
+ SetPen(wxPen(colour, 1, wxPENSTYLE_SOLID));
+ SetBrush(wxBrush(colour));
+ if(nDirection == wxEAST)
+ DoDrawRectangle(rect.GetRight()-x-xDelta+1, rect.GetTop(),
+ xDelta, rect.GetHeight());
+ else //nDirection == wxWEST
+ DoDrawRectangle(rect.GetLeft()+x, rect.GetTop(),
+ xDelta, rect.GetHeight());
+ }
+ }
+ else // nDirection == wxNORTH || nDirection == wxSOUTH
+ {
+ wxInt32 y = rect.GetHeight();
+ wxInt32 w = y; // height of area to shade
+ wxInt32 yDelta = w/255; // height of one shade bend
+ if (yDelta < 1)
+ yDelta = 1;
- heightTextTotal += heightLineDefault;
- }
+ while (y > 0)
+ {
+ y -= yDelta;
+ if (nR1 > nR2)
+ nR = nR1 - (nR1-nR2)*(w-y)/w;
else
- {
- GetTextExtent(curLine, &widthLine, &heightLine,
- NULL, NULL, font);
- if ( widthLine > widthTextMax )
- widthTextMax = widthLine;
- heightTextTotal += heightLine;
- }
+ nR = nR1 + (nR2-nR1)*(w-y)/w;
- if ( *pc == _T('\n') )
- {
- curLine.clear();
- }
+ if (nG1 > nG2)
+ nG = nG1 - (nG1-nG2)*(w-y)/w;
else
- {
- // the end of string
- break;
- }
+ nG = nG1 + (nG2-nG1)*(w-y)/w;
+
+ if (nB1 > nB2)
+ nB = nB1 - (nB1-nB2)*(w-y)/w;
+ else
+ nB = nB1 + (nB2-nB1)*(w-y)/w;
+
+ wxColour colour(nR,nG,nB);
+ SetPen(wxPen(colour, 1, wxPENSTYLE_SOLID));
+ SetBrush(wxBrush(colour));
+ if(nDirection == wxNORTH)
+ DoDrawRectangle(rect.GetLeft(), rect.GetTop()+y,
+ rect.GetWidth(), yDelta);
+ else //nDirection == wxSOUTH
+ DoDrawRectangle(rect.GetLeft(), rect.GetBottom()-y-yDelta+1,
+ rect.GetWidth(), yDelta);
}
- else
+ }
+
+ SetPen(oldPen);
+ SetBrush(oldBrush);
+}
+
+void wxDCImpl::DoGradientFillConcentric(const wxRect& rect,
+ const wxColour& initialColour,
+ const wxColour& destColour,
+ const wxPoint& circleCenter)
+{
+ // save the old pen and ensure it is restored on exit
+ const wxPen penOrig = m_pen;
+ wxON_BLOCK_EXIT_SET(m_pen, penOrig);
+
+ wxUint8 nR1 = destColour.Red();
+ wxUint8 nG1 = destColour.Green();
+ wxUint8 nB1 = destColour.Blue();
+ wxUint8 nR2 = initialColour.Red();
+ wxUint8 nG2 = initialColour.Green();
+ wxUint8 nB2 = initialColour.Blue();
+ wxUint8 nR, nG, nB;
+
+
+ //Radius
+ double cx = rect.GetWidth() / 2;
+ double cy = rect.GetHeight() / 2;
+ double dRadius;
+ if (cx < cy)
+ dRadius = cx;
+ else
+ dRadius = cy;
+
+ //Offset of circle
+ double ptX, ptY;
+ ptX = circleCenter.x;
+ ptY = circleCenter.y;
+ double nCircleOffX = ptX - cx;
+ double nCircleOffY = ptY - cy;
+
+ double dGradient;
+ double dx, dy;
+
+ for ( wxInt32 x = 0; x < rect.GetWidth(); x++ )
+ {
+ for ( wxInt32 y = 0; y < rect.GetHeight(); y++ )
{
- curLine += *pc;
+ //get color difference
+ dx = x;
+ dy = y;
+
+ dGradient = ((dRadius - sqrt( (dx - cx - nCircleOffX) * (dx - cx - nCircleOffX)
+ +(dy - cy - nCircleOffY) * (dy - cy - nCircleOffY)
+ )
+ ) * 100
+ ) / dRadius;
+
+ //normalize Gradient
+ if (dGradient < 0)
+ dGradient = 0.0;
+
+ //get dest colors
+ nR = (wxUint8)(nR1 + ((nR2 - nR1) * dGradient / 100));
+ nG = (wxUint8)(nG1 + ((nG2 - nG1) * dGradient / 100));
+ nB = (wxUint8)(nB1 + ((nB2 - nB1) * dGradient / 100));
+
+ //set the pixel
+ SetPen(wxColour(nR,nG,nB));
+ DoDrawPoint(x + rect.GetLeft(), y + rect.GetTop());
}
}
+}
- if ( x )
- *x = widthTextMax;
- if ( y )
- *y = heightTextTotal;
- if ( h )
- *h = heightLine;
+void wxDCImpl::InheritAttributes(wxWindow *win)
+{
+ wxCHECK_RET( win, "window can't be NULL" );
+
+ SetFont(win->GetFont());
+ SetTextForeground(win->GetForegroundColour());
+ SetTextBackground(win->GetBackgroundColour());
+ SetBackground(win->GetBackgroundColour());
+ SetLayoutDirection(win->GetLayoutDirection());
}
-void wxDCBase::DrawLabel(const wxString& text,
+void wxDCImpl::DoGetFontMetrics(int *height,
+ int *ascent,
+ int *descent,
+ int *internalLeading,
+ int *externalLeading,
+ int *averageWidth) const
+{
+ // Average width is typically the same as width of 'x'.
+ wxCoord h, d;
+ DoGetTextExtent("x", averageWidth, &h, &d, externalLeading);
+
+ if ( height )
+ *height = h;
+ if ( ascent )
+ *ascent = h - d;
+ if ( descent )
+ *descent = d;
+ if ( internalLeading )
+ *internalLeading = 0;
+}
+
+//-----------------------------------------------------------------------------
+// wxDC
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
+
+void wxDC::CopyAttributes(const wxDC& dc)
+{
+ SetFont(dc.GetFont());
+ SetTextForeground(dc.GetTextForeground());
+ SetTextBackground(dc.GetTextBackground());
+ SetBackground(dc.GetBackground());
+ SetLayoutDirection(dc.GetLayoutDirection());
+}
+
+void wxDC::DrawLabel(const wxString& text,
const wxBitmap& bitmap,
const wxRect& rect,
int alignment,
GetMultiLineTextExtent(text, &widthText, &heightText, &heightLine);
wxCoord width, height;
- if ( bitmap.Ok() )
+ if ( bitmap.IsOk() )
{
width = widthText + bitmap.GetWidth();
height = bitmap.GetHeight();
wxCoord x0 = x,
y0 = y,
width0 = width;
- if ( bitmap.Ok() )
+ if ( bitmap.IsOk() )
{
- DrawBitmap(bitmap, x, y, TRUE /* use mask */);
+ DrawBitmap(bitmap, x, y, true /* use mask */);
wxCoord offset = bitmap.GetWidth() + 4;
x += offset;
yUnderscore = 0;
// split the string into lines and draw each of them separately
+ //
+ // NB: while wxDC::DrawText() on some platforms supports drawing multi-line
+ // strings natively, this is not the case for all of them, notably not
+ // wxMSW which uses this function for multi-line texts, so we may only
+ // call DrawText() for single-line strings from here to avoid infinite
+ // recursion.
wxString curLine;
- for ( const wxChar *pc = text; ; pc++ )
+ for ( wxString::const_iterator pc = text.begin(); ; ++pc )
{
- if ( *pc == _T('\n') || *pc == _T('\0') )
+ if ( pc == text.end() || *pc == '\n' )
{
int xRealStart = x; // init it here to avoid compielr warnings
endUnderscore += xRealStart;
}
- if ( *pc == _T('\0') )
+ if ( pc == text.end() )
break;
curLine.clear();
}
else // not end of line
{
- if ( pc - text.c_str() == indexAccel )
+ if ( pc - text.begin() == indexAccel )
{
// remeber to draw underscore here
GetTextExtent(curLine, &startUnderscore, NULL);
if ( startUnderscore != endUnderscore )
{
// it should be of the same colour as text
- SetPen(wxPen(GetTextForeground(), 0, wxSOLID));
+ SetPen(wxPen(GetTextForeground(), 0, wxPENSTYLE_SOLID));
- yUnderscore--;
+ // This adjustment is relatively arbitrary: we need to draw the
+ // underline slightly higher to avoid overflowing the character cell
+ // but whether we should do it 1, 2 or 3 pixels higher is not clear.
+ //
+ // The currently used value seems to be compatible with native MSW
+ // behaviour, i.e. it results in the same appearance of the owner-drawn
+ // and normal labels.
+ yUnderscore -= 2;
DrawLine(startUnderscore, yUnderscore, endUnderscore, yUnderscore);
}
CalcBoundingBox(x0, y0);
CalcBoundingBox(x0 + width0, y0 + height);
}
+
+#if WXWIN_COMPATIBILITY_2_8
+ // for compatibility with the old code when wxCoord was long everywhere
+void wxDC::GetTextExtent(const wxString& string,
+ long *x, long *y,
+ long *descent,
+ long *externalLeading,
+ const wxFont *theFont) const
+ {
+ wxCoord x2, y2, descent2, externalLeading2;
+ m_pimpl->DoGetTextExtent(string, &x2, &y2,
+ &descent2, &externalLeading2,
+ theFont);
+ if ( x )
+ *x = x2;
+ if ( y )
+ *y = y2;
+ if ( descent )
+ *descent = descent2;
+ if ( externalLeading )
+ *externalLeading = externalLeading2;
+ }
+
+void wxDC::GetLogicalOrigin(long *x, long *y) const
+ {
+ wxCoord x2, y2;
+ m_pimpl->DoGetLogicalOrigin(&x2, &y2);
+ if ( x )
+ *x = x2;
+ if ( y )
+ *y = y2;
+ }
+
+void wxDC::GetDeviceOrigin(long *x, long *y) const
+ {
+ wxCoord x2, y2;
+ m_pimpl->DoGetDeviceOrigin(&x2, &y2);
+ if ( x )
+ *x = x2;
+ if ( y )
+ *y = y2;
+ }
+
+void wxDC::GetClippingBox(long *x, long *y, long *w, long *h) const
+ {
+ wxCoord xx,yy,ww,hh;
+ m_pimpl->DoGetClippingBox(&xx, &yy, &ww, &hh);
+ if (x) *x = xx;
+ if (y) *y = yy;
+ if (w) *w = ww;
+ if (h) *h = hh;
+ }
+
+void wxDC::DrawObject(wxDrawObject* drawobject)
+{
+ drawobject->Draw(*this);
+ CalcBoundingBox(drawobject->MinX(),drawobject->MinY());
+ CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
+}
+
+#endif // WXWIN_COMPATIBILITY_2_8
+
+/*
+Notes for wxWidgets DrawEllipticArcRot(...)
+
+wxDCBase::DrawEllipticArcRot(...) draws a rotated elliptic arc or an ellipse.
+It uses wxDCBase::CalculateEllipticPoints(...) and wxDCBase::Rotate(...),
+which are also new.
+
+All methods are generic, so they can be implemented in wxDCBase.
+DoDrawEllipticArcRot(...) is virtual, so it can be called from deeper
+methods like (WinCE) wxDC::DoDrawArc(...).
+
+CalculateEllipticPoints(...) fills a given list of wxPoints with some points
+of an elliptic arc. The algorithm is pixel-based: In every row (in flat
+parts) or every column (in steep parts) only one pixel is calculated.
+Trigonometric calculation (sin, cos, tan, atan) is only done if the
+starting angle is not equal to the ending angle. The calculation of the
+pixels is done using simple arithmetic only and should perform not too
+bad even on devices without floating point processor. I didn't test this yet.
+
+Rotate(...) rotates a list of point pixel-based, you will see rounding errors.
+For instance: an ellipse rotated 180 degrees is drawn
+slightly different from the original.
+
+The points are then moved to an array and used to draw a polyline and/or polygon
+(with center added, the pie).
+The result looks quite similar to the native ellipse, only e few pixels differ.
+
+The performance on a desktop system (Athlon 1800, WinXP) is about 7 times
+slower as DrawEllipse(...), which calls the native API.
+An rotated ellipse outside the clipping region takes nearly the same time,
+while an native ellipse outside takes nearly no time to draw.
+
+If you draw an arc with this new method, you will see the starting and ending angles
+are calculated properly.
+If you use DrawEllipticArc(...), you will see they are only correct for circles
+and not properly calculated for ellipses.
+
+Peter Lenhard
+p.lenhard@t-online.de
+*/
+
+#ifdef __WXWINCE__
+void wxDCImpl::DoDrawEllipticArcRot( wxCoord x, wxCoord y,
+ wxCoord w, wxCoord h,
+ double sa, double ea, double angle )
+{
+ wxPointList list;
+
+ CalculateEllipticPoints( &list, x, y, w, h, sa, ea );
+ Rotate( &list, angle, wxPoint( x+w/2, y+h/2 ) );
+
+ // Add center (for polygon/pie)
+ list.Append( new wxPoint( x+w/2, y+h/2 ) );
+
+ // copy list into array and delete list elements
+ int n = list.GetCount();
+ wxPoint *points = new wxPoint[n];
+ int i = 0;
+ wxPointList::compatibility_iterator node;
+ for ( node = list.GetFirst(); node; node = node->GetNext(), i++ )
+ {
+ wxPoint *point = node->GetData();
+ points[i].x = point->x;
+ points[i].y = point->y;
+ delete point;
+ }
+
+ // first draw the pie without pen, if necessary
+ if( GetBrush() != *wxTRANSPARENT_BRUSH )
+ {
+ wxPen tempPen( GetPen() );
+ SetPen( *wxTRANSPARENT_PEN );
+ DoDrawPolygon( n, points, 0, 0 );
+ SetPen( tempPen );
+ }
+
+ // then draw the arc without brush, if necessary
+ if( GetPen() != *wxTRANSPARENT_PEN )
+ {
+ // without center
+ DoDrawLines( n-1, points, 0, 0 );
+ }
+
+ delete [] points;
+
+} // DrawEllipticArcRot
+
+void wxDCImpl::Rotate( wxPointList* points, double angle, wxPoint center )
+{
+ if( angle != 0.0 )
+ {
+ double pi(M_PI);
+ double dSinA = -sin(angle*2.0*pi/360.0);
+ double dCosA = cos(angle*2.0*pi/360.0);
+ wxPointList::compatibility_iterator node;
+ for ( node = points->GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint* point = node->GetData();
+
+ // transform coordinates, if necessary
+ if( center.x ) point->x -= center.x;
+ if( center.y ) point->y -= center.y;
+
+ // calculate rotation, rounding simply by implicit cast to integer
+ int xTemp = point->x * dCosA - point->y * dSinA;
+ point->y = point->x * dSinA + point->y * dCosA;
+ point->x = xTemp;
+
+ // back transform coordinates, if necessary
+ if( center.x ) point->x += center.x;
+ if( center.y ) point->y += center.y;
+ }
+ }
+}
+
+void wxDCImpl::CalculateEllipticPoints( wxPointList* points,
+ wxCoord xStart, wxCoord yStart,
+ wxCoord w, wxCoord h,
+ double sa, double ea )
+{
+ double pi = M_PI;
+ double sar = 0;
+ double ear = 0;
+ int xsa = 0;
+ int ysa = 0;
+ int xea = 0;
+ int yea = 0;
+ int sq = 0;
+ int eq = 0;
+ bool bUseAngles = false;
+ if( w<0 ) w = -w;
+ if( h<0 ) h = -h;
+ // half-axes
+ wxCoord a = w/2;
+ wxCoord b = h/2;
+ // decrement 1 pixel if ellipse is smaller than 2*a, 2*b
+ int decrX = 0;
+ if( 2*a == w ) decrX = 1;
+ int decrY = 0;
+ if( 2*b == h ) decrY = 1;
+ // center
+ wxCoord xCenter = xStart + a;
+ wxCoord yCenter = yStart + b;
+ // calculate data for start and end, if necessary
+ if( sa != ea )
+ {
+ bUseAngles = true;
+ // normalisation of angles
+ while( sa<0 ) sa += 360;
+ while( ea<0 ) ea += 360;
+ while( sa>=360 ) sa -= 360;
+ while( ea>=360 ) ea -= 360;
+ // calculate quadrant numbers
+ if( sa > 270 ) sq = 3;
+ else if( sa > 180 ) sq = 2;
+ else if( sa > 90 ) sq = 1;
+ if( ea > 270 ) eq = 3;
+ else if( ea > 180 ) eq = 2;
+ else if( ea > 90 ) eq = 1;
+ sar = sa * pi / 180.0;
+ ear = ea * pi / 180.0;
+ // correct angle circle -> ellipse
+ sar = atan( -a/(double)b * tan( sar ) );
+ if ( sq == 1 || sq == 2 ) sar += pi;
+ ear = atan( -a/(double)b * tan( ear ) );
+ if ( eq == 1 || eq == 2 ) ear += pi;
+ // coordinates of points
+ xsa = xCenter + a * cos( sar );
+ if( sq == 0 || sq == 3 ) xsa -= decrX;
+ ysa = yCenter + b * sin( sar );
+ if( sq == 2 || sq == 3 ) ysa -= decrY;
+ xea = xCenter + a * cos( ear );
+ if( eq == 0 || eq == 3 ) xea -= decrX;
+ yea = yCenter + b * sin( ear );
+ if( eq == 2 || eq == 3 ) yea -= decrY;
+ } // if iUseAngles
+ // calculate c1 = b^2, c2 = b^2/a^2 with a = w/2, b = h/2
+ double c1 = b * b;
+ double c2 = 2.0 / w;
+ c2 *= c2;
+ c2 *= c1;
+ wxCoord x = 0;
+ wxCoord y = b;
+ long x2 = 1;
+ long y2 = y*y;
+ long y2_old = 0;
+ long y_old = 0;
+ // Lists for quadrant 1 to 4
+ wxPointList pointsarray[4];
+ // Calculate points for first quadrant and set in all quadrants
+ for( x = 0; x <= a; ++x )
+ {
+ x2 = x2+x+x-1;
+ y2_old = y2;
+ y_old = y;
+ bool bNewPoint = false;
+ while( y2 > c1 - c2 * x2 && y > 0 )
+ {
+ bNewPoint = true;
+ y2 = y2-y-y+1;
+ --y;
+ }
+ // old y now too big: set point with old y, old x
+ if( bNewPoint && x>1)
+ {
+ int x1 = x - 1;
+ // remove points on the same line
+ pointsarray[0].Insert( new wxPoint( xCenter + x1 - decrX, yCenter - y_old ) );
+ pointsarray[1].Append( new wxPoint( xCenter - x1, yCenter - y_old ) );
+ pointsarray[2].Insert( new wxPoint( xCenter - x1, yCenter + y_old - decrY ) );
+ pointsarray[3].Append( new wxPoint( xCenter + x1 - decrX, yCenter + y_old - decrY ) );
+ } // set point
+ } // calculate point
+
+ // Starting and/or ending points for the quadrants, first quadrant gets both.
+ pointsarray[0].Insert( new wxPoint( xCenter + a - decrX, yCenter ) );
+ pointsarray[0].Append( new wxPoint( xCenter, yCenter - b ) );
+ pointsarray[1].Append( new wxPoint( xCenter - a, yCenter ) );
+ pointsarray[2].Append( new wxPoint( xCenter, yCenter + b - decrY ) );
+ pointsarray[3].Append( new wxPoint( xCenter + a - decrX, yCenter ) );
+
+ // copy quadrants in original list
+ if( bUseAngles )
+ {
+ // Copy the right part of the points in the lists
+ // and delete the wxPoints, because they do not leave this method.
+ points->Append( new wxPoint( xsa, ysa ) );
+ int q = sq;
+ bool bStarted = false;
+ bool bReady = false;
+ bool bForceTurn = ( sq == eq && sa > ea );
+ while( !bReady )
+ {
+ wxPointList::compatibility_iterator node;
+ for( node = pointsarray[q].GetFirst(); node; node = node->GetNext() )
+ {
+ // once: go to starting point in start quadrant
+ if( !bStarted &&
+ (
+ node->GetData()->x < xsa+1 && q <= 1
+ ||
+ node->GetData()->x > xsa-1 && q >= 2
+ )
+ )
+ {
+ bStarted = true;
+ }
+
+ // copy point, if not at ending point
+ if( bStarted )
+ {
+ if( q != eq || bForceTurn
+ ||
+ ( (wxPoint*) node->GetData() )->x > xea+1 && q <= 1
+ ||
+ ( (wxPoint*) node->GetData() )->x < xea-1 && q >= 2
+ )
+ {
+ // copy point
+ wxPoint* pPoint = new wxPoint( *(node->GetData()) );
+ points->Append( pPoint );
+ }
+ else if( q == eq && !bForceTurn || node->GetData()->x == xea)
+ {
+ bReady = true;
+ }
+ }
+ } // for node
+ ++q;
+ if( q > 3 ) q = 0;
+ bForceTurn = false;
+ bStarted = true;
+ } // while not bReady
+ points->Append( new wxPoint( xea, yea ) );
+
+ // delete points
+ for( q = 0; q < 4; ++q )
+ {
+ wxPointList::compatibility_iterator node;
+ for( node = pointsarray[q].GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint *p = node->GetData();
+ delete p;
+ }
+ }
+ }
+ else
+ {
+ wxPointList::compatibility_iterator node;
+ // copy whole ellipse, wxPoints will be deleted outside
+ for( node = pointsarray[0].GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint *p = node->GetData();
+ points->Append( p );
+ }
+ for( node = pointsarray[1].GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint *p = node->GetData();
+ points->Append( p );
+ }
+ for( node = pointsarray[2].GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint *p = node->GetData();
+ points->Append( p );
+ }
+ for( node = pointsarray[3].GetFirst(); node; node = node->GetNext() )
+ {
+ wxPoint *p = node->GetData();
+ points->Append( p );
+ }
+ } // not iUseAngles
+} // CalculateEllipticPoints
+
+#endif // __WXWINCE__
+
+float wxDCImpl::GetFontPointSizeAdjustment(float dpi)
+{
+ // wxMSW has long-standing bug where wxFont point size is interpreted as
+ // "pixel size corresponding to given point size *on screen*". In other
+ // words, on a typical 600dpi printer and a typical 96dpi screen, fonts
+ // are ~6 times smaller when printing. Unfortunately, this bug is so severe
+ // that *all* printing code has to account for it and consequently, other
+ // ports need to emulate this bug too:
+ const wxSize screenPPI = wxGetDisplayPPI();
+ return float(screenPPI.y) / dpi;
+}
projects / wxWidgets.git / blobdiff