src/cocoa/display.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/cocoa/display.mm
   3 // Purpose:     Cocoa implementation of wxDisplay class
   4 // Author:      Ryan Norton
   5 // Modified by:
   6 // Created:     2004-10-03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Ryan Norton
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_DISPLAY
  20
  21 #include "wx/display.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/dynarray.h"
  25     #include "wx/string.h"
  26     #include "wx/gdicmn.h"
  27 #endif
  28
  29 #include "wx/display_impl.h"
  30
  31 #import <Foundation/Foundation.h>
  32
  33 // ----------------------------------------------------------------------------
  34 // display classes implementation
  35 // ----------------------------------------------------------------------------
  36
  37 class wxDisplayImplMacOSX : public wxDisplayImpl
  38 {
  39 public:
  40     wxDisplayImplMacOSX(unsigned n, CGDirectDisplayID id_)
  41         : wxDisplayImpl(n),
  42           m_id(id_)
  43     {
  44     }
  45
  46     virtual wxRect GetGeometry() const;
  47     virtual wxString GetName() const { return wxString(); }
  48
  49     virtual wxArrayVideoModes GetModes(const wxVideoMode& mode) const;
  50     virtual wxVideoMode GetCurrentMode() const;
  51     virtual bool ChangeMode(const wxVideoMode& mode);
  52
  53 private:
  54     CGDirectDisplayID m_id;
  55
  56     wxDECLARE_NO_COPY_CLASS(wxDisplayImplMacOSX);
  57 };
  58
  59 class wxDisplayFactoryMacOSX : public wxDisplayFactory
  60 {
  61 public:
  62     wxDisplayFactoryMacOSX() { }
  63
  64     virtual wxDisplayImpl *CreateDisplay(unsigned n);
  65     virtual unsigned GetCount();
  66     virtual int GetFromPoint(const wxPoint& pt);
  67
  68 protected:
  69     wxDECLARE_NO_COPY_CLASS(wxDisplayFactoryMacOSX);
  70 };
  71
  72 // ============================================================================
  73 // wxDisplayFactoryMacOSX implementation
  74 // ============================================================================
  75
  76 unsigned wxDisplayFactoryMacOSX::GetCount()
  77 {
  78     CGDisplayCount count;
  79     CGDisplayErr err = CGGetActiveDisplayList(0, NULL, &count);
  80     wxCHECK_MSG( err != CGDisplayNoErr, 0, "CGGetActiveDisplayList() failed" );
  81
  82     return count;
  83 }
  84
  85 int wxDisplayFactoryMacOSX::GetFromPoint(const wxPoint& p)
  86 {
  87     CGPoint thePoint = {(float)p.x, (float)p.y};
  88     CGDirectDisplayID theID;
  89     CGDisplayCount theCount;
  90     CGDisplayErr err = CGGetDisplaysWithPoint(thePoint, 1, &theID, &theCount);
  91     wxASSERT(err == CGDisplayNoErr);
  92
  93     int nWhich = wxNOT_FOUND;
  94
  95     if (theCount)
  96     {
  97         theCount = GetCount();
  98         CGDirectDisplayID* theIDs = new CGDirectDisplayID[theCount];
  99         err = CGGetActiveDisplayList(theCount, theIDs, &theCount);
 100         wxASSERT(err == CGDisplayNoErr);
 101
 102         for (nWhich = 0; nWhich < (int) theCount; ++nWhich)
 103         {
 104             if (theIDs[nWhich] == theID)
 105                 break;
 106         }
 107
 108         delete [] theIDs;
 109
 110         if (nWhich == (int) theCount)
 111         {
 112             wxFAIL_MSG(wxT("Failed to find display in display list"));
 113             nWhich = wxNOT_FOUND;
 114         }
 115     }
 116
 117     return nWhich;
 118 }
 119
 120 wxDisplayImpl *wxDisplayFactoryMacOSX::CreateDisplay(unsigned n)
 121 {
 122     CGDisplayCount theCount = GetCount();
 123     CGDirectDisplayID* theIDs = new CGDirectDisplayID[theCount];
 124
 125     CGDisplayErr err = CGGetActiveDisplayList(theCount, theIDs, &theCount);
 126     wxCHECK_MSG( err != CGDisplayNoErr, NULL, "CGGetActiveDisplayList() failed" );
 127
 128     wxASSERT( n < theCount );
 129
 130     wxDisplayImplMacOSX *display = new wxDisplayImplMacOSX(n, theIDs[n]);
 131
 132     delete [] theIDs;
 133
 134     return display;
 135 }
 136
 137
 138 wxRect wxDisplayImplMacOSX::GetGeometry() const
 139 {
 140     CGRect theRect = CGDisplayBounds(m_id);
 141     return wxRect(  (int)theRect.origin.x,
 142                     (int)theRect.origin.y,
 143                     (int)theRect.size.width,
 144                     (int)theRect.size.height  ); //floats
 145 }
 146
 147 static int wxCFDictKeyToInt( CFDictionaryRef desc, CFStringRef key )
 148 {
 149     CFNumberRef value;
 150     int num = 0;
 151
 152     if ( (value = (CFNumberRef) CFDictionaryGetValue(desc, key)) == NULL )
 153         return 0;
 154     CFNumberGetValue(value, kCFNumberIntType, &num);
 155     return num;
 156 }
 157
 158 wxArrayVideoModes wxDisplayImplMacOSX::GetModes(const wxVideoMode& mode) const
 159 {
 160     wxArrayVideoModes Modes;
 161
 162     CFArrayRef theArray = CGDisplayAvailableModes(m_id);
 163
 164     for(CFIndex i = 0; i < CFArrayGetCount(theArray); ++i)
 165     {
 166         CFDictionaryRef theValue = (CFDictionaryRef) CFArrayGetValueAtIndex(theArray, i);
 167
 168         wxVideoMode theMode(wxCFDictKeyToInt(theValue, kCGDisplayWidth),
 169                             wxCFDictKeyToInt(theValue, kCGDisplayHeight),
 170                             wxCFDictKeyToInt(theValue, kCGDisplayBitsPerPixel),
 171                             wxCFDictKeyToInt(theValue, kCGDisplayRefreshRate));
 172
 173         if (theMode.Matches(mode))
 174             Modes.Add(theMode);
 175     }
 176
 177     return Modes;
 178 }
 179
 180 wxVideoMode wxDisplayImplMacOSX::GetCurrentMode() const
 181 {
 182     CFDictionaryRef theValue = CGDisplayCurrentMode (m_id);
 183
 184     return wxVideoMode(wxCFDictKeyToInt(theValue, kCGDisplayWidth),
 185                             wxCFDictKeyToInt(theValue, kCGDisplayHeight),
 186                             wxCFDictKeyToInt(theValue, kCGDisplayBitsPerPixel),
 187                             wxCFDictKeyToInt(theValue, kCGDisplayRefreshRate));
 188 }
 189
 190 bool wxDisplayImplMacOSX::ChangeMode(const wxVideoMode& mode)
 191 {
 192     //Changing to default mode (wxDefualtVideoMode) doesn't
 193     //work because we don't have access to the system's 'scrn'
 194     //resource which holds the user's mode which the system
 195     //will return to after this app is done
 196     boolean_t bExactMatch;
 197     CFDictionaryRef theCGMode = CGDisplayBestModeForParametersAndRefreshRate (
 198                                         m_id,
 199                                         (size_t)mode.bpp,
 200                                         (size_t)mode.w,
 201                                         (size_t)mode.h,
 202                                         (double)mode.refresh,
 203                                         &bExactMatch);
 204
 205     bool bOK = bExactMatch;
 206
 207     if(bOK)
 208         bOK = CGDisplaySwitchToMode(m_id, theCGMode) == CGDisplayNoErr;
 209
 210     return bOK;
 211 }
 212
 213 // ============================================================================
 214 // wxDisplay::CreateFactory()
 215 // ============================================================================
 216
 217 /* static */ wxDisplayFactory *wxDisplay::CreateFactory()
 218 {
 219     return new wxDisplayFactoryMacOSX;
 220 }
 221
 222 #endif // wxUSE_DISPLAY