X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0e320a79f187558effb04d92020b470372bbe456..e1811a014bf84a353e46607ce9f5e48393a2e236:/src/os2/dcclient.cpp diff --git a/src/os2/dcclient.cpp b/src/os2/dcclient.cpp index 925d9609ee..75ffabc6ff 100644 --- a/src/os2/dcclient.cpp +++ b/src/os2/dcclient.cpp @@ -1,635 +1,260 @@ ///////////////////////////////////////////////////////////////////////////// // Name: dcclient.cpp // Purpose: wxClientDC class -// Author: AUTHOR +// Author: Julian Smart // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ -// Copyright: (c) AUTHOR -// Licence: wxWindows licence +// Copyright: (c) Julian Smart and Markus Holzem +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dcclient.h" -#endif - -#include "wx/dcclient.h" -#include "wx/dcmemory.h" -#include "wx/region.h" -#include - -//----------------------------------------------------------------------------- -// constants -//----------------------------------------------------------------------------- +// =========================================================================== +// declarations +// =========================================================================== -#define RAD2DEG 57.2957795131 +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- -//----------------------------------------------------------------------------- -// wxPaintDC -//----------------------------------------------------------------------------- - -#if !USE_SHARED_LIBRARY -IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) -IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) -IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC) +#ifdef __GNUG__ + #pragma implementation "dcclient.h" #endif -/* - * wxWindowDC - */ - -wxWindowDC::wxWindowDC(void) -{ -}; - -wxWindowDC::wxWindowDC( wxWindow *window ) -{ -}; - -wxWindowDC::~wxWindowDC(void) -{ -}; - -void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1), - const wxColour& WXUNUSED(col), int WXUNUSED(style) ) -{ -}; - -bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const -{ - return FALSE; -}; - -void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 ) -{ - if (!Ok()) return; - -}; - -void wxWindowDC::CrossHair( long x, long y ) -{ - if (!Ok()) return; - -}; - -void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc ) -{ - if (!Ok()) return; - - long xx1 = XLOG2DEV(x1); - long yy1 = YLOG2DEV(y1); - long xx2 = XLOG2DEV(x2); - long yy2 = YLOG2DEV(y2); - long xxc = XLOG2DEV((long)xc); - long yyc = YLOG2DEV((long)yc); - double dx = xx1 - xxc; - double dy = yy1 - yyc; - double radius = sqrt(dx*dx+dy*dy); - long r = (long)radius; - double radius1, radius2; - - if (xx1 == xx2 && yy1 == yy2) - { - radius1 = 0.0; - radius2 = 360.0; - } - else - if (radius == 0.0) - { - radius1 = radius2 = 0.0; - } - else - { - radius1 = (xx1 - xxc == 0) ? - (yy1 - yyc < 0) ? 90.0 : -90.0 : - -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG; - radius2 = (xx2 - xxc == 0) ? - (yy2 - yyc < 0) ? 90.0 : -90.0 : - -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG; - }; - long alpha1 = long(radius1 * 64.0); - long alpha2 = long((radius2 - radius1) * 64.0); - while (alpha2 <= 0) alpha2 += 360*64; - while (alpha1 > 360*64) alpha1 -= 360*64; - - if (m_brush.GetStyle() != wxTRANSPARENT) {}; - - if (m_pen.GetStyle() != wxTRANSPARENT) {}; - -}; - -void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea ) -{ - if (!Ok()) return; - - long xx = XLOG2DEV(x); - long yy = YLOG2DEV(y); - long ww = m_signX * XLOG2DEVREL(width); - long hh = m_signY * YLOG2DEVREL(height); - - // CMB: handle -ve width and/or height - if (ww < 0) { ww = -ww; xx = xx - ww; } - if (hh < 0) { hh = -hh; yy = yy - hh; } - - long start = long(sa * 64.0); - long end = long(ea * 64.0); - if (m_brush.GetStyle() != wxTRANSPARENT) {}; - - if (m_pen.GetStyle() != wxTRANSPARENT) {}; -}; +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" -void wxWindowDC::DrawPoint( long x, long y ) -{ - if (!Ok()) return; - - if (m_pen.GetStyle() != wxTRANSPARENT) {}; -}; - -void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset ) -{ - if (!Ok()) return; - - if (m_pen.GetStyle() == wxTRANSPARENT) return; - - for (int i = 0; i < n-1; i++) - { - long x1 = XLOG2DEV(points[i].x + xoffset); - long x2 = XLOG2DEV(points[i+1].x + xoffset); - long y1 = YLOG2DEV(points[i].y + yoffset); // oh, what a waste - long y2 = YLOG2DEV(points[i+1].y + yoffset); - }; -}; - -void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset ) -{ - if (!Ok()) return; - - if (m_pen.GetStyle() == wxTRANSPARENT) return; - - wxNode *node = points->First(); - while (node->Next()) - { - wxPoint *point = (wxPoint*)node->Data(); - wxPoint *npoint = (wxPoint*)node->Next()->Data(); - long x1 = XLOG2DEV(point->x + xoffset); - long x2 = XLOG2DEV(npoint->x + xoffset); - long y1 = YLOG2DEV(point->y + yoffset); // and again... - long y2 = YLOG2DEV(npoint->y + yoffset); - node = node->Next(); - }; -}; - -void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[], - long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) ) -{ - if (!Ok()) return; -}; - -void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset), - long WXUNUSED(yoffset), int WXUNUSED(fillStyle) ) -{ - if (!Ok()) return; -}; - -void wxWindowDC::DrawRectangle( long x, long y, long width, long height ) -{ - if (!Ok()) return; - - long xx = XLOG2DEV(x); - long yy = YLOG2DEV(y); - long ww = m_signX * XLOG2DEVREL(width); - long hh = m_signY * YLOG2DEVREL(height); - - // CMB: draw nothing if transformed w or h is 0 - if (ww == 0 || hh == 0) return; - - // CMB: handle -ve width and/or height - if (ww < 0) { ww = -ww; xx = xx - ww; } - if (hh < 0) { hh = -hh; yy = yy - hh; } - - if (m_brush.GetStyle() != wxTRANSPARENT) {}; - - if (m_pen.GetStyle() != wxTRANSPARENT) {}; -}; - -void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius ) -{ - if (!Ok()) return; - - if (radius < 0.0) radius = - radius * ((width < height) ? width : height); - - long xx = XLOG2DEV(x); - long yy = YLOG2DEV(y); - long ww = m_signX * XLOG2DEVREL(width); - long hh = m_signY * YLOG2DEVREL(height); - long rr = XLOG2DEVREL((long)radius); - - // CMB: handle -ve width and/or height - if (ww < 0) { ww = -ww; xx = xx - ww; } - if (hh < 0) { hh = -hh; yy = yy - hh; } - - // CMB: if radius is zero use DrawRectangle() instead to avoid - // X drawing errors with small radii - if (rr == 0) - { - DrawRectangle( x, y, width, height ); - return; - } - - // CMB: draw nothing if transformed w or h is 0 - if (ww == 0 || hh == 0) return; - - // CMB: adjust size if outline is drawn otherwise the result is - // 1 pixel too wide and high - if (m_pen.GetStyle() != wxTRANSPARENT) - { - ww--; - hh--; - } +#ifdef __BORLANDC__ + #pragma hdrstop +#endif - // CMB: ensure dd is not larger than rectangle otherwise we - // get an hour glass shape - long dd = 2 * rr; - if (dd > ww) dd = ww; - if (dd > hh) dd = hh; - rr = dd / 2; +#include "wx/string.h" +#include "wx/log.h" +#include "wx/window.h" - if (m_brush.GetStyle() != wxTRANSPARENT) - { - }; - - if (m_pen.GetStyle() != wxTRANSPARENT) - { - }; -}; +#include "wx/msw/private.h" -void wxWindowDC::DrawEllipse( long x, long y, long width, long height ) -{ - if (!Ok()) return; - - long xx = XLOG2DEV(x); - long yy = YLOG2DEV(y); - long ww = m_signX * XLOG2DEVREL(width); - long hh = m_signY * YLOG2DEVREL(height); - - // CMB: handle -ve width and/or height - if (ww < 0) { ww = -ww; xx = xx - ww; } - if (hh < 0) { hh = -hh; yy = yy - hh; } - - if (m_brush.GetStyle() != wxTRANSPARENT) {}; - - if (m_pen.GetStyle() != wxTRANSPARENT) {}; -}; - -bool wxWindowDC::CanDrawBitmap(void) const -{ - return TRUE; -}; +#include "wx/dcclient.h" -void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask ) -{ - if (!Ok()) return; - - if (!icon.Ok()) return; - - int xx = XLOG2DEV(x); - int yy = YLOG2DEV(y); - -}; +// ---------------------------------------------------------------------------- +// array/list types +// ---------------------------------------------------------------------------- -bool wxWindowDC::Blit( long xdest, long ydest, long width, long height, - wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) ) +struct WXDLLEXPORT wxPaintDCInfo { - if (!Ok()) return FALSE; - - // CMB 20/5/98: add blitting of bitmaps - if (source->IsKindOf(CLASSINFO(wxMemoryDC))) - { - wxMemoryDC* srcDC = (wxMemoryDC*)source; - /* - GdkBitmap* bmap = srcDC->m_selected.GetBitmap(); - if (bmap) + wxPaintDCInfo(wxWindow *win, wxDC *dc) { - gdk_draw_bitmap ( - m_window, - m_textGC, - bmap, - source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc), - XLOG2DEV(xdest), YLOG2DEV(ydest), - source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height) - ); - return TRUE; + hwnd = win->GetHWND(); + hdc = dc->GetHDC(); + count = 1; } - */ - } - return TRUE; + WXHWND hwnd; // window for this DC + WXHDC hdc; // the DC handle + size_t count; // usage count }; -void wxWindowDC::DrawText( const wxString &text, long x, long y, bool -WXUNUSED(use16) ) -{ - if (!Ok()) return; +#include "wx/arrimpl.cpp" -}; +WX_DEFINE_OBJARRAY(wxArrayDCInfo); +// ---------------------------------------------------------------------------- +// macros +// ---------------------------------------------------------------------------- +#if !USE_SHARED_LIBRARY + IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) + IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) + IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC) +#endif -bool wxWindowDC::CanGetTextExtent(void) const -{ - return TRUE; -}; +// ---------------------------------------------------------------------------- +// global variables +// ---------------------------------------------------------------------------- -void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height, - long *WXUNUSED(descent), long *WXUNUSED(externalLeading), - wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) ) -{ - if (!Ok()) return; - -}; +static PAINTSTRUCT g_paintStruct; -long wxWindowDC::GetCharWidth(void) -{ - if (!Ok()) return 0; - return 0; -}; +#ifdef __WXDEBUG__ + // a global variable which we check to verify that wxPaintDC are only + // created in resopnse to WM_PAINT message - doing this from elsewhere is a + // common programming error among wxWindows programmers and might lead to + // very subtle and difficult to debug refresh/repaint bugs. + int g_isPainting = 0; +#endif // __WXDEBUG__ -long wxWindowDC::GetCharHeight(void) -{ - if (!Ok()) return 0; - return 0; -}; +// =========================================================================== +// implementation +// =========================================================================== -void wxWindowDC::Clear(void) -{ - if (!Ok()) return; - -}; +// ---------------------------------------------------------------------------- +// wxWindowDC +// ---------------------------------------------------------------------------- -void wxWindowDC::SetFont( const wxFont &font ) +wxWindowDC::wxWindowDC() { - if (!Ok()) return; - - m_font = font; -}; + m_canvas = NULL; +} -void wxWindowDC::SetPen( const wxPen &pen ) +wxWindowDC::wxWindowDC(wxWindow *the_canvas) { - if (!Ok()) return; + m_canvas = the_canvas; + m_hDC = (WXHDC) ::WinOpenWindowDC(GetWinHwnd(the_canvas) ); + m_hDCCount++; - if (m_pen == pen) return; - - m_pen = pen; - - if (!m_pen.Ok()) return; -}; - -void wxWindowDC::SetBrush( const wxBrush &brush ) -{ - if (!Ok()) return; - - if (m_brush == brush) return; - - m_brush = brush; - - if (!m_brush.Ok()) return; - -}; + SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID)); +} -void wxWindowDC::SetBackground( const wxBrush &brush ) +wxWindowDC::~wxWindowDC() { - if (!Ok()) return; - - if (m_backgroundBrush == brush) return; - - m_backgroundBrush = brush; - - if (!m_backgroundBrush.Ok()) return; - -}; + if (m_canvas && m_hDC) + { + SelectOldObjects(m_hDC); -void wxWindowDC::SetLogicalFunction( int function ) -{ - if (m_logicalFunction == function) return; -}; + // + // In PM one does not explicitly close or release an open WindowDC + // They automatically close with the window, unless explicitly detached + // + m_hDC = 0; + } -void wxWindowDC::SetTextForeground( const wxColour &col ) -{ - if (!Ok()) return; - - if (m_textForegroundColour == col) return; - - m_textForegroundColour = col; - if (!m_textForegroundColour.Ok()) return; -}; + m_hDCCount--; +} -void wxWindowDC::SetTextBackground( const wxColour &col ) -{ - if (!Ok()) return; - - if (m_textBackgroundColour == col) return; - - m_textBackgroundColour = col; - if (!m_textBackgroundColour.Ok()) return; -}; +// ---------------------------------------------------------------------------- +// wxClientDC +// ---------------------------------------------------------------------------- -void wxWindowDC::SetBackgroundMode( int mode ) +wxClientDC::wxClientDC() { - m_backgroundMode = mode; - - if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT) - { - } -}; + m_canvas = NULL; +} -void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) ) +wxClientDC::wxClientDC(wxWindow *the_canvas) { -}; + m_canvas = the_canvas; + m_hDC = (WXHDC) ::GetDC(GetWinHwnd(the_canvas)); -void wxWindowDC::SetClippingRegion( long x, long y, long width, long height ) -{ - wxDC::SetClippingRegion( x, y, width, height ); + // the background mode is only used for text background + // and is set in DrawText() to OPAQUE as required, other- + // wise always TRANSPARENT, RR + ::SetBkMode( GetHdc(), TRANSPARENT ); - // TODO - -}; + SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID)); +} -void wxWindowDC::SetClippingRegion( const wxRegion& region ) +wxClientDC::~wxClientDC() { - wxRect box = region.GetBox(); + if ( m_canvas && GetHdc() ) + { + SelectOldObjects(m_hDC); - wxDC::SetClippingRegion( box.x, box.y, box.width, box.height ); + ::ReleaseDC(GetWinHwnd(m_canvas), GetHdc()); + m_hDC = 0; + } +} - // TODO +// ---------------------------------------------------------------------------- +// wxPaintDC +// ---------------------------------------------------------------------------- + +// VZ: initial implementation (by JACS) only remembered the last wxPaintDC +// created and tried to reuse - this was supposed to take care of a +// situation when a derived class OnPaint() calls base class OnPaint() +// because in this case ::BeginPaint() shouldn't be called second time. +// +// I'm not sure how useful this is, however we must remember the HWND +// associated with the last HDC as well - otherwise we may (and will!) try +// to reuse the HDC for another HWND which is a nice recipe for disaster. +// +// So we store a list of windows for which we already have the DC and not +// just one single hDC. This seems to work, but I'm really not sure about +// the usefullness of the whole idea - IMHO it's much better to not call +// base class OnPaint() at all, or, if we really want to allow it, add a +// "wxPaintDC *" parameter to wxPaintEvent which should be used if it's +// !NULL instead of creating a new DC. + +wxArrayDCInfo wxPaintDC::ms_cache; + +wxPaintDC::wxPaintDC() +{ + m_canvas = NULL; + m_hDC = 0; } -void wxWindowDC::DestroyClippingRegion(void) +wxPaintDC::wxPaintDC(wxWindow *canvas) { - wxDC::DestroyClippingRegion(); - -}; - -// ----------------------------------- spline code ---------------------------------------- - -void wx_quadratic_spline(double a1, double b1, double a2, double b2, - double a3, double b3, double a4, double b4); -void wx_clear_stack(void); -int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3, - double *y3, double *x4, double *y4); -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(wxDC *dc); - -wxList wx_spline_point_list; - -#define half(z1, z2) ((z1+z2)/2.0) -#define THRESHOLD 5 + wxCHECK_RET( canvas, _T("NULL canvas in wxPaintDC ctor") ); -/* iterative version */ +#ifdef __WXDEBUG__ + if ( g_isPainting <= 0 ) + { + wxFAIL_MSG( _T("wxPaintDC may be created only in EVT_PAINT handler!") ); -void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4, - double b4) -{ - register double xmid, ymid; - double x1, y1, x2, y2, x3, y3, x4, y4; - - wx_clear_stack(); - wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4); - - while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) { - xmid = (double)half(x2, x3); - ymid = (double)half(y2, y3); - if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD && - fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) { - wx_spline_add_point( x1, y1 ); - wx_spline_add_point( xmid, ymid ); - } else { - wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3), - (double)half(x3, x4), (double)half(y3, y4), x4, y4); - wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2), - (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid); - } + return; } -} - -/* utilities used by spline drawing routines */ - -typedef struct wx_spline_stack_struct { - double x1, y1, x2, y2, x3, y3, x4, y4; -} Stack; +#endif // __WXDEBUG__ -#define SPLINE_STACK_DEPTH 20 -static Stack wx_spline_stack[SPLINE_STACK_DEPTH]; -static Stack *wx_stack_top; -static int wx_stack_count; + m_canvas = canvas; -void wx_clear_stack(void) -{ - wx_stack_top = wx_spline_stack; - wx_stack_count = 0; -} - -void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) -{ - wx_stack_top->x1 = x1; - wx_stack_top->y1 = y1; - wx_stack_top->x2 = x2; - wx_stack_top->y2 = y2; - wx_stack_top->x3 = x3; - wx_stack_top->y3 = y3; - wx_stack_top->x4 = x4; - wx_stack_top->y4 = y4; - wx_stack_top++; - wx_stack_count++; -} + // do we have a DC for this window in the cache? + wxPaintDCInfo *info = FindInCache(); + if ( info ) + { + m_hDC = info->hdc; + info->count++; + } + else // not in cache, create a new one + { + m_hDC = (WXHDC)::BeginPaint(GetWinHwnd(m_canvas), &g_paintStruct); + ms_cache.Add(new wxPaintDCInfo(m_canvas, this)); + } -int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, - double *x3, double *y3, double *x4, double *y4) -{ - if (wx_stack_count == 0) - return (0); - wx_stack_top--; - wx_stack_count--; - *x1 = wx_stack_top->x1; - *y1 = wx_stack_top->y1; - *x2 = wx_stack_top->x2; - *y2 = wx_stack_top->y2; - *x3 = wx_stack_top->x3; - *y3 = wx_stack_top->y3; - *x4 = wx_stack_top->x4; - *y4 = wx_stack_top->y4; - return (1); -} + // the background mode is only used for text background + // and is set in DrawText() to OPAQUE as required, other- + // wise always TRANSPARENT, RR + ::SetBkMode( GetHdc(), TRANSPARENT ); -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; + SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID)); } -static void wx_spline_draw_point_array(wxDC *dc) +wxPaintDC::~wxPaintDC() { - dc->DrawLines(&wx_spline_point_list, 0, 0 ); - wxNode *node = wx_spline_point_list.First(); - while (node) - { - wxPoint *point = (wxPoint *)node->Data(); - delete point; - delete node; - node = wx_spline_point_list.First(); - } -} - -void wxWindowDC::DrawSpline( wxList *points ) -{ - wxPoint *p; - double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4; - double x1, y1, x2, y2; + if ( m_hDC ) + { + SelectOldObjects(m_hDC); - wxNode *node = points->First(); - p = (wxPoint *)node->Data(); + size_t index; + wxPaintDCInfo *info = FindInCache(&index); - x1 = p->x; - y1 = p->y; + wxCHECK_RET( info, _T("existing DC should have a cache entry") ); - node = node->Next(); - p = (wxPoint *)node->Data(); + if ( !--info->count ) + { + ::EndPaint(GetWinHwnd(m_canvas), &g_paintStruct); - x2 = p->x; - y2 = p->y; - cx1 = (double)((x1 + x2) / 2); - cy1 = (double)((y1 + y2) / 2); - cx2 = (double)((cx1 + x2) / 2); - cy2 = (double)((cy1 + y2) / 2); + ms_cache.Remove(index); + } + //else: cached DC entry is still in use - wx_spline_add_point(x1, y1); + // prevent the base class dtor from ReleaseDC()ing it again + m_hDC = 0; + } +} - while ((node = node->Next()) != NULL) +wxPaintDCInfo *wxPaintDC::FindInCache(size_t *index) const +{ + wxPaintDCInfo *info = NULL; + size_t nCache = ms_cache.GetCount(); + for ( size_t n = 0; n < nCache; n++ ) { - p = (wxPoint *)node->Data(); - x1 = x2; - y1 = y2; - x2 = p->x; - y2 = p->y; - cx4 = (double)(x1 + x2) / 2; - cy4 = (double)(y1 + y2) / 2; - cx3 = (double)(x1 + cx4) / 2; - cy3 = (double)(y1 + cy4) / 2; - - wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4); - - cx1 = cx4; - cy1 = cy4; - cx2 = (double)(cx1 + x2) / 2; - cy2 = (double)(cy1 + y2) / 2; + info = &ms_cache[n]; + if ( info->hwnd == m_canvas->GetHWND() ) + { + if ( index ) + *index = n; + break; + } } - wx_spline_add_point( cx1, cy1 ); - wx_spline_add_point( x2, y2 ); - - wx_spline_draw_point_array( this ); -}; + return info; +}