1///////////////////////////////////////////////////////////////////////////// 2// Name: dc.cpp 3// Purpose: 4// Author: Robert Roebling 5// RCS-ID: $Id: dc.cpp 35650 2005-09-23 12:56:45Z MR $ 6// Copyright: (c) 1998 Robert Roebling 7// Licence: wxWindows licence 8///////////////////////////////////////////////////////////////////////////// 9 10// For compilers that support precompilation, includes "wx.h". 11#include "wx/wxprec.h" 12 13#include "wx/dc.h" 14 15#include <gdk/gdk.h> 16#include <gtk/gtk.h> 17 18//----------------------------------------------------------------------------- 19// wxDC 20//----------------------------------------------------------------------------- 21 22IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase) 23 24wxDC::wxDC() 25{ 26 m_ok = FALSE; 27 28 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() / 29 (double)wxGetDisplaySizeMM().GetWidth(); 30 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() / 31 (double)wxGetDisplaySizeMM().GetHeight(); 32 33 m_needComputeScaleX = FALSE; /* not used yet */ 34 m_needComputeScaleY = FALSE; /* not used yet */ 35 36 m_logicalFunction = wxCOPY; 37 38 m_pen = *wxBLACK_PEN; 39 m_font = *wxNORMAL_FONT; 40 m_brush = *wxWHITE_BRUSH; 41} 42 43void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) 44{ 45 m_clipping = TRUE; 46 m_clipX1 = x; 47 m_clipY1 = y; 48 m_clipX2 = x + width; 49 m_clipY2 = y + height; 50} 51 52// --------------------------------------------------------------------------- 53// get DC capabilities 54// --------------------------------------------------------------------------- 55 56void wxDC::DoGetSizeMM( int* width, int* height ) const 57{ 58 int w = 0; 59 int h = 0; 60 GetSize( &w, &h ); 61 if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) ); 62 if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) ); 63} 64 65// Resolution in pixels per logical inch 66wxSize wxDC::GetPPI() const 67{ 68 // TODO (should probably be pure virtual) 69 return wxSize(0, 0); 70} 71 72// --------------------------------------------------------------------------- 73// set various DC parameters 74// --------------------------------------------------------------------------- 75 76void wxDC::ComputeScaleAndOrigin() 77{ 78 m_scaleX = m_logicalScaleX * m_userScaleX; 79 m_scaleY = m_logicalScaleY * m_userScaleY; 80} 81 82void wxDC::SetMapMode( int mode ) 83{ 84 switch (mode) 85 { 86 case wxMM_TWIPS: 87 SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y ); 88 break; 89 case wxMM_POINTS: 90 SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y ); 91 break; 92 case wxMM_METRIC: 93 SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y ); 94 break; 95 case wxMM_LOMETRIC: 96 SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 ); 97 break; 98 default: 99 case wxMM_TEXT: 100 SetLogicalScale( 1.0, 1.0 ); 101 break; 102 } 103 m_mappingMode = mode; 104 105/* we don't do this mega optimisation 106 if (mode != wxMM_TEXT) 107 { 108 m_needComputeScaleX = TRUE; 109 m_needComputeScaleY = TRUE; 110 } 111*/ 112} 113 114void wxDC::SetUserScale( double x, double y ) 115{ 116 // allow negative ? -> no 117 m_userScaleX = x; 118 m_userScaleY = y; 119 ComputeScaleAndOrigin(); 120} 121 122void wxDC::SetLogicalScale( double x, double y ) 123{ 124 // allow negative ? 125 m_logicalScaleX = x; 126 m_logicalScaleY = y; 127 ComputeScaleAndOrigin(); 128} 129 130void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y ) 131{ 132 m_logicalOriginX = x * m_signX; // is this still correct ? 133 m_logicalOriginY = y * m_signY; 134 ComputeScaleAndOrigin(); 135} 136 137void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y ) 138{ 139 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there 140 m_deviceOriginX = x; 141 m_deviceOriginY = y; 142 ComputeScaleAndOrigin(); 143} 144 145void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp ) 146{ 147 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there 148 m_signX = (xLeftRight ? 1 : -1); 149 m_signY = (yBottomUp ? -1 : 1); 150 ComputeScaleAndOrigin(); 151} 152 153// --------------------------------------------------------------------------- 154// coordinates transformations 155// --------------------------------------------------------------------------- 156 157wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const 158{ 159 return ((wxDC *)this)->XDEV2LOG(x); 160} 161 162wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const 163{ 164 return ((wxDC *)this)->YDEV2LOG(y); 165} 166 167wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const 168{ 169 return ((wxDC *)this)->XDEV2LOGREL(x); 170} 171 172wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const 173{ 174 return ((wxDC *)this)->YDEV2LOGREL(y); 175} 176 177wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const 178{ 179 return ((wxDC *)this)->XLOG2DEV(x); 180} 181 182wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const 183{ 184 return ((wxDC *)this)->YLOG2DEV(y); 185} 186 187wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const 188{ 189 return ((wxDC *)this)->XLOG2DEVREL(x); 190} 191 192wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const 193{ 194 return ((wxDC *)this)->YLOG2DEVREL(y); 195} 196 197