///////////////////////////////////////////////////////////////////////////// // Name: dcclient.cpp // Purpose: wxClientDC class // Author: AUTHOR // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) AUTHOR // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifdef __GNUG__ #pragma implementation "dcclient.h" #endif #include "wx/dcclient.h" #include "wx/dcmemory.h" #include "wx/region.h" #include //----------------------------------------------------------------------------- // constants //----------------------------------------------------------------------------- #define RAD2DEG 57.2957795131 //----------------------------------------------------------------------------- // wxPaintDC //----------------------------------------------------------------------------- #if !USE_SHARED_LIBRARY IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC) #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) {}; }; 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--; } // 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; if (m_brush.GetStyle() != wxTRANSPARENT) { }; if (m_pen.GetStyle() != wxTRANSPARENT) { }; }; 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; }; 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); }; bool wxWindowDC::Blit( long xdest, long ydest, long width, long height, wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) ) { 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) { 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; } */ } return TRUE; }; void wxWindowDC::DrawText( const wxString &text, long x, long y, bool WXUNUSED(use16) ) { if (!Ok()) return; }; bool wxWindowDC::CanGetTextExtent(void) const { return TRUE; }; 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; }; long wxWindowDC::GetCharWidth(void) { if (!Ok()) return 0; return 0; }; long wxWindowDC::GetCharHeight(void) { if (!Ok()) return 0; return 0; }; void wxWindowDC::Clear(void) { if (!Ok()) return; }; void wxWindowDC::SetFont( const wxFont &font ) { if (!Ok()) return; m_font = font; }; void wxWindowDC::SetPen( const wxPen &pen ) { if (!Ok()) return; 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; }; void wxWindowDC::SetBackground( const wxBrush &brush ) { if (!Ok()) return; if (m_backgroundBrush == brush) return; m_backgroundBrush = brush; if (!m_backgroundBrush.Ok()) return; }; void wxWindowDC::SetLogicalFunction( int function ) { if (m_logicalFunction == function) return; }; void wxWindowDC::SetTextForeground( const wxColour &col ) { if (!Ok()) return; if (m_textForegroundColour == col) return; m_textForegroundColour = col; if (!m_textForegroundColour.Ok()) return; }; void wxWindowDC::SetTextBackground( const wxColour &col ) { if (!Ok()) return; if (m_textBackgroundColour == col) return; m_textBackgroundColour = col; if (!m_textBackgroundColour.Ok()) return; }; void wxWindowDC::SetBackgroundMode( int mode ) { m_backgroundMode = mode; if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT) { } }; void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) ) { }; void wxWindowDC::SetClippingRegion( long x, long y, long width, long height ) { wxDC::SetClippingRegion( x, y, width, height ); // TODO }; void wxWindowDC::SetClippingRegion( const wxRegion& region ) { wxRect box = region.GetBox(); wxDC::SetClippingRegion( box.x, box.y, box.width, box.height ); // TODO } void wxWindowDC::DestroyClippingRegion(void) { 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 /* iterative version */ 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); } } } /* utilities used by spline drawing routines */ typedef struct wx_spline_stack_struct { double x1, y1, x2, y2, x3, y3, x4, y4; } Stack; #define SPLINE_STACK_DEPTH 20 static Stack wx_spline_stack[SPLINE_STACK_DEPTH]; static Stack *wx_stack_top; static int wx_stack_count; 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++; } 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); } 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; } static void wx_spline_draw_point_array(wxDC *dc) { 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; wxNode *node = points->First(); p = (wxPoint *)node->Data(); x1 = p->x; y1 = p->y; node = node->Next(); p = (wxPoint *)node->Data(); 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); wx_spline_add_point(x1, y1); while ((node = node->Next()) != NULL) { 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; } wx_spline_add_point( cx1, cy1 ); wx_spline_add_point( x2, y2 ); wx_spline_draw_point_array( this ); };