| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dc.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // RCS-ID: $Id$ |
| 6 | // Copyright: (c) 1998 Robert Roebling, Markus Holzem |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | |
| 11 | #ifdef __GNUG__ |
| 12 | #pragma implementation "dc.h" |
| 13 | #endif |
| 14 | |
| 15 | #include "wx/dc.h" |
| 16 | |
| 17 | #include <gdk/gdk.h> |
| 18 | #include <gtk/gtk.h> |
| 19 | |
| 20 | //----------------------------------------------------------------------------- |
| 21 | // constants |
| 22 | //----------------------------------------------------------------------------- |
| 23 | |
| 24 | #define mm2inches 0.0393700787402 |
| 25 | #define inches2mm 25.4 |
| 26 | #define mm2twips 56.6929133859 |
| 27 | #define twips2mm 0.0176388888889 |
| 28 | #define mm2pt 2.83464566929 |
| 29 | #define pt2mm 0.352777777778 |
| 30 | |
| 31 | //----------------------------------------------------------------------------- |
| 32 | // wxDC |
| 33 | //----------------------------------------------------------------------------- |
| 34 | |
| 35 | IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase) |
| 36 | |
| 37 | wxDC::wxDC() |
| 38 | { |
| 39 | m_ok = FALSE; |
| 40 | |
| 41 | m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() / |
| 42 | (double)wxGetDisplaySizeMM().GetWidth(); |
| 43 | m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() / |
| 44 | (double)wxGetDisplaySizeMM().GetHeight(); |
| 45 | |
| 46 | m_needComputeScaleX = FALSE; /* not used yet */ |
| 47 | m_needComputeScaleY = FALSE; /* not used yet */ |
| 48 | |
| 49 | m_logicalFunction = wxCOPY; |
| 50 | |
| 51 | m_pen = *wxBLACK_PEN; |
| 52 | m_font = *wxNORMAL_FONT; |
| 53 | m_brush = *wxWHITE_BRUSH; |
| 54 | } |
| 55 | |
| 56 | void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 57 | { |
| 58 | m_clipping = TRUE; |
| 59 | m_clipX1 = x; |
| 60 | m_clipY1 = y; |
| 61 | m_clipX2 = x + width; |
| 62 | m_clipY2 = y + height; |
| 63 | } |
| 64 | |
| 65 | void wxDC::DestroyClippingRegion() |
| 66 | { |
| 67 | m_clipping = FALSE; |
| 68 | } |
| 69 | |
| 70 | // --------------------------------------------------------------------------- |
| 71 | // get DC capabilities |
| 72 | // --------------------------------------------------------------------------- |
| 73 | |
| 74 | void wxDC::DoGetSizeMM( int* width, int* height ) const |
| 75 | { |
| 76 | int w = 0; |
| 77 | int h = 0; |
| 78 | GetSize( &w, &h ); |
| 79 | if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) ); |
| 80 | if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) ); |
| 81 | } |
| 82 | |
| 83 | // Resolution in pixels per logical inch |
| 84 | wxSize wxDC::GetPPI() const |
| 85 | { |
| 86 | // TODO (should probably be pure virtual) |
| 87 | return wxSize(0, 0); |
| 88 | } |
| 89 | |
| 90 | // --------------------------------------------------------------------------- |
| 91 | // set various DC parameters |
| 92 | // --------------------------------------------------------------------------- |
| 93 | |
| 94 | void wxDC::ComputeScaleAndOrigin() |
| 95 | { |
| 96 | m_scaleX = m_logicalScaleX * m_userScaleX; |
| 97 | m_scaleY = m_logicalScaleY * m_userScaleY; |
| 98 | } |
| 99 | |
| 100 | void wxDC::SetMapMode( int mode ) |
| 101 | { |
| 102 | switch (mode) |
| 103 | { |
| 104 | case wxMM_TWIPS: |
| 105 | SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y ); |
| 106 | break; |
| 107 | case wxMM_POINTS: |
| 108 | SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y ); |
| 109 | break; |
| 110 | case wxMM_METRIC: |
| 111 | SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y ); |
| 112 | break; |
| 113 | case wxMM_LOMETRIC: |
| 114 | SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 ); |
| 115 | break; |
| 116 | default: |
| 117 | case wxMM_TEXT: |
| 118 | SetLogicalScale( 1.0, 1.0 ); |
| 119 | break; |
| 120 | } |
| 121 | m_mappingMode = mode; |
| 122 | |
| 123 | /* we don't do this mega optimisation |
| 124 | if (mode != wxMM_TEXT) |
| 125 | { |
| 126 | m_needComputeScaleX = TRUE; |
| 127 | m_needComputeScaleY = TRUE; |
| 128 | } |
| 129 | */ |
| 130 | } |
| 131 | |
| 132 | void wxDC::SetUserScale( double x, double y ) |
| 133 | { |
| 134 | // allow negative ? -> no |
| 135 | m_userScaleX = x; |
| 136 | m_userScaleY = y; |
| 137 | ComputeScaleAndOrigin(); |
| 138 | } |
| 139 | |
| 140 | void wxDC::SetLogicalScale( double x, double y ) |
| 141 | { |
| 142 | // allow negative ? |
| 143 | m_logicalScaleX = x; |
| 144 | m_logicalScaleY = y; |
| 145 | ComputeScaleAndOrigin(); |
| 146 | } |
| 147 | |
| 148 | void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y ) |
| 149 | { |
| 150 | m_logicalOriginX = x * m_signX; // is this still correct ? |
| 151 | m_logicalOriginY = y * m_signY; |
| 152 | ComputeScaleAndOrigin(); |
| 153 | } |
| 154 | |
| 155 | void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y ) |
| 156 | { |
| 157 | // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there |
| 158 | m_deviceOriginX = x; |
| 159 | m_deviceOriginY = y; |
| 160 | ComputeScaleAndOrigin(); |
| 161 | } |
| 162 | |
| 163 | void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp ) |
| 164 | { |
| 165 | // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there |
| 166 | m_signX = (xLeftRight ? 1 : -1); |
| 167 | m_signY = (yBottomUp ? -1 : 1); |
| 168 | ComputeScaleAndOrigin(); |
| 169 | } |
| 170 | |
| 171 | // --------------------------------------------------------------------------- |
| 172 | // coordinates transformations |
| 173 | // --------------------------------------------------------------------------- |
| 174 | |
| 175 | wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const |
| 176 | { |
| 177 | return ((wxDC *)this)->XDEV2LOG(x); |
| 178 | } |
| 179 | |
| 180 | wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const |
| 181 | { |
| 182 | return ((wxDC *)this)->YDEV2LOG(y); |
| 183 | } |
| 184 | |
| 185 | wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const |
| 186 | { |
| 187 | return ((wxDC *)this)->XDEV2LOGREL(x); |
| 188 | } |
| 189 | |
| 190 | wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const |
| 191 | { |
| 192 | return ((wxDC *)this)->YDEV2LOGREL(y); |
| 193 | } |
| 194 | |
| 195 | wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const |
| 196 | { |
| 197 | return ((wxDC *)this)->XLOG2DEV(x); |
| 198 | } |
| 199 | |
| 200 | wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const |
| 201 | { |
| 202 | return ((wxDC *)this)->YLOG2DEV(y); |
| 203 | } |
| 204 | |
| 205 | wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const |
| 206 | { |
| 207 | return ((wxDC *)this)->XLOG2DEVREL(x); |
| 208 | } |
| 209 | |
| 210 | wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const |
| 211 | { |
| 212 | return ((wxDC *)this)->YLOG2DEVREL(y); |
| 213 | } |
| 214 | |