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Fixed GetIcon to keep up with return type change on all other platforms.
[wxWidgets.git] / src / gtk1 / dc.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: dc.cpp
3// Purpose:
4// Author: Robert Roebling
6f65e337 5// RCS-ID: $Id$
6c9a19aa 6// Copyright: (c) 1998 Robert Roebling
65571936 7// Licence: wxWindows licence
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8/////////////////////////////////////////////////////////////////////////////
9
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10// For compilers that support precompilation, includes "wx.h".
11#include "wx/wxprec.h"
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12
13#include "wx/dc.h"
14
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15#include <gdk/gdk.h>
16#include <gtk/gtk.h>
83624f79 17
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18//-----------------------------------------------------------------------------
19// wxDC
20//-----------------------------------------------------------------------------
21
a23fd0e1 22IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
c801d85f 23
4bc67cc5 24wxDC::wxDC()
c801d85f 25{
4bc67cc5 26 m_ok = FALSE;
a23fd0e1 27
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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();
a23fd0e1 32
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33 m_needComputeScaleX = FALSE; /* not used yet */
34 m_needComputeScaleY = FALSE; /* not used yet */
c801d85f 35
4bc67cc5 36 m_logicalFunction = wxCOPY;
a23fd0e1 37
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38 m_pen = *wxBLACK_PEN;
39 m_font = *wxNORMAL_FONT;
41bf0eb3 40 m_brush = *wxWHITE_BRUSH;
ff7b1510 41}
c801d85f 42
72cdf4c9 43void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
c801d85f 44{
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45 m_clipping = TRUE;
46 m_clipX1 = x;
47 m_clipY1 = y;
48 m_clipX2 = x + width;
49 m_clipY2 = y + height;
ff7b1510 50}
c801d85f 51
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52// ---------------------------------------------------------------------------
53// get DC capabilities
54// ---------------------------------------------------------------------------
c801d85f 55
a23fd0e1 56void wxDC::DoGetSizeMM( int* width, int* height ) const
c801d85f 57{
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58 int w = 0;
59 int h = 0;
60 GetSize( &w, &h );
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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) );
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63}
64
65// Resolution in pixels per logical inch
a23fd0e1 66wxSize wxDC::GetPPI() const
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67{
68 // TODO (should probably be pure virtual)
69 return wxSize(0, 0);
ff7b1510 70}
c801d85f 71
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72// ---------------------------------------------------------------------------
73// set various DC parameters
74// ---------------------------------------------------------------------------
c801d85f 75
a23fd0e1 76void wxDC::ComputeScaleAndOrigin()
c801d85f 77{
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78 m_scaleX = m_logicalScaleX * m_userScaleX;
79 m_scaleY = m_logicalScaleY * m_userScaleY;
ff7b1510 80}
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81
82void wxDC::SetMapMode( int mode )
83{
a23fd0e1 84 switch (mode)
4bc67cc5 85 {
e3065973 86 case wxMM_TWIPS:
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87 SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
88 break;
e3065973 89 case wxMM_POINTS:
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90 SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
91 break;
e3065973 92 case wxMM_METRIC:
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93 SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
94 break;
e3065973 95 case wxMM_LOMETRIC:
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96 SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
97 break;
98 default:
e3065973 99 case wxMM_TEXT:
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100 SetLogicalScale( 1.0, 1.0 );
101 break;
102 }
b9857632 103 m_mappingMode = mode;
e2bcbdfb 104
4bc67cc5 105/* we don't do this mega optimisation
e3065973 106 if (mode != wxMM_TEXT)
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107 {
108 m_needComputeScaleX = TRUE;
109 m_needComputeScaleY = TRUE;
110 }
111*/
ff7b1510 112}
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113
114void wxDC::SetUserScale( double x, double y )
115{
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116 // allow negative ? -> no
117 m_userScaleX = x;
118 m_userScaleY = y;
119 ComputeScaleAndOrigin();
ff7b1510 120}
c801d85f 121
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122void wxDC::SetLogicalScale( double x, double y )
123{
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124 // allow negative ?
125 m_logicalScaleX = x;
126 m_logicalScaleY = y;
127 ComputeScaleAndOrigin();
ff7b1510 128}
c801d85f 129
72cdf4c9 130void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
c801d85f 131{
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132 m_logicalOriginX = x * m_signX; // is this still correct ?
133 m_logicalOriginY = y * m_signY;
134 ComputeScaleAndOrigin();
ff7b1510 135}
c801d85f 136
72cdf4c9 137void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
c801d85f 138{
4bc67cc5 139 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
a23fd0e1 140 m_deviceOriginX = x;
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141 m_deviceOriginY = y;
142 ComputeScaleAndOrigin();
ff7b1510 143}
c801d85f 144
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145void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
146{
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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();
ff7b1510 151}
c801d85f 152
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153// ---------------------------------------------------------------------------
154// coordinates transformations
155// ---------------------------------------------------------------------------
156
72cdf4c9 157wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
c801d85f 158{
b0e0d661 159 return ((wxDC *)this)->XDEV2LOG(x);
ff7b1510 160}
c801d85f 161
72cdf4c9 162wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
c801d85f 163{
b0e0d661 164 return ((wxDC *)this)->YDEV2LOG(y);
ff7b1510 165}
c801d85f 166
72cdf4c9 167wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
c801d85f 168{
b0e0d661 169 return ((wxDC *)this)->XDEV2LOGREL(x);
ff7b1510 170}
c801d85f 171
72cdf4c9 172wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
c801d85f 173{
b0e0d661 174 return ((wxDC *)this)->YDEV2LOGREL(y);
ff7b1510 175}
c801d85f 176
72cdf4c9 177wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
c801d85f 178{
b0e0d661 179 return ((wxDC *)this)->XLOG2DEV(x);
ff7b1510 180}
c801d85f 181
72cdf4c9 182wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
c801d85f 183{
b0e0d661 184 return ((wxDC *)this)->YLOG2DEV(y);
ff7b1510 185}
c801d85f 186
72cdf4c9 187wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
c801d85f 188{
b0e0d661 189 return ((wxDC *)this)->XLOG2DEVREL(x);
ff7b1510 190}
c801d85f 191
72cdf4c9 192wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
c801d85f 193{
b0e0d661 194 return ((wxDC *)this)->YLOG2DEVREL(y);
ff7b1510 195}
c801d85f 196