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