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 #ifndef WX_PRECOMP
  22    #include "wx/dynarray.h"
  23 #endif
  24
  25 #include "wx/display.h"
  26 #include "wx/display_impl.h"
  27 #include "wx/gdicmn.h"
  28 #include "wx/string.h"
  29
  30 #import <Foundation/Foundation.h>
  31
  32 // ----------------------------------------------------------------------------
  33 // display classes implementation
  34 // ----------------------------------------------------------------------------
  35
  36 class wxDisplayImplMacOSX : public wxDisplayImpl
  37 {
  38 public:
  39     wxDisplayImplMacOSX(size_t n, CGDirectDisplayID id_)
  40         : wxDisplayImpl(n),
  41           m_id(id_)
  42     {
  43     }
  44
  45     virtual wxRect GetGeometry() const;
  46     virtual wxString GetName() const { return wxString(); }
  47
  48     virtual wxArrayVideoModes GetModes(const wxVideoMode& mode) const;
  49     virtual wxVideoMode GetCurrentMode() const;
  50     virtual bool ChangeMode(const wxVideoMode& mode);
  51
  52 private:
  53     CGDirectDisplayID m_id;
  54
  55     DECLARE_NO_COPY_CLASS(wxDisplayImplMacOSX)
  56 };
  57
  58 class wxDisplayFactoryMacOSX : public wxDisplayFactory
  59 {
  60 public:
  61     wxDisplayFactoryMacOSX() { }
  62
  63     virtual wxDisplayImpl *CreateDisplay(size_t n);
  64     virtual size_t GetCount();
  65     virtual int GetFromPoint(const wxPoint& pt);
  66
  67 protected:
  68     DECLARE_NO_COPY_CLASS(wxDisplayFactoryMacOSX)
  69 };
  70
  71 // ============================================================================
  72 // wxDisplayFactoryMacOSX implementation
  73 // ============================================================================
  74
  75 size_t wxDisplayFactoryMacOSX::GetCount()
  76 {
  77     CGDisplayCount count;
  78 #ifdef __WXDEBUG__
  79     CGDisplayErr err =
  80 #endif
  81     CGGetActiveDisplayList(0, NULL, &count);
  82
  83     wxASSERT(err == CGDisplayNoErr);
  84
  85     return count;
  86 }
  87
  88 int wxDisplayFactoryMacOSX::GetFromPoint(const wxPoint& p)
  89 {
  90     CGPoint thePoint = {(float)p.x, (float)p.y};
  91     CGDirectDisplayID theID;
  92     CGDisplayCount theCount;
  93     CGDisplayErr err = CGGetDisplaysWithPoint(thePoint, 1, &theID, &theCount);
  94     wxASSERT(err == CGDisplayNoErr);
  95
  96     int nWhich = wxNOT_FOUND;
  97
  98     if (theCount)
  99     {
 100         theCount = GetCount();
 101         CGDirectDisplayID* theIDs = new CGDirectDisplayID[theCount];
 102         err = CGGetActiveDisplayList(theCount, theIDs, &theCount);
 103         wxASSERT(err == CGDisplayNoErr);
 104
 105         for (nWhich = 0; nWhich < (int) theCount; ++nWhich)
 106         {
 107             if (theIDs[nWhich] == theID)
 108                 break;
 109         }
 110
 111         delete [] theIDs;
 112
 113         if (nWhich == (int) theCount)
 114         {
 115             wxFAIL_MSG(wxT("Failed to find display in display list"));
 116             nWhich = wxNOT_FOUND;
 117         }
 118     }
 119
 120     return nWhich;
 121 }
 122
 123 wxDisplayImpl *wxDisplayFactoryMacOSX::CreateDisplay(size_t n)
 124 {
 125     CGDisplayCount theCount = GetCount();
 126     CGDirectDisplayID* theIDs = new CGDirectDisplayID[theCount];
 127
 128 #ifdef __WXDEBUG__
 129     CGDisplayErr err =
 130 #endif
 131     CGGetActiveDisplayList(theCount, theIDs, &theCount);
 132
 133     wxASSERT( err == CGDisplayNoErr );
 134     wxASSERT( n < theCount );
 135
 136     wxDisplayImplMacOSX *display = new wxDisplayImplMacOSX(n, theIDs[n]);
 137
 138     delete [] theIDs;
 139
 140     return display;
 141 }
 142
 143
 144 wxRect wxDisplayImplMacOSX::GetGeometry() const
 145 {
 146     CGRect theRect = CGDisplayBounds(m_id);
 147     return wxRect(  (int)theRect.origin.x,
 148                     (int)theRect.origin.y,
 149                     (int)theRect.size.width,
 150                     (int)theRect.size.height  ); //floats
 151 }
 152
 153 static int wxCFDictKeyToInt( CFDictionaryRef desc, CFStringRef key )
 154 {
 155     CFNumberRef value;
 156     int num = 0;
 157
 158     if ( (value = (CFNumberRef) CFDictionaryGetValue(desc, key)) == NULL )
 159         return 0;
 160     CFNumberGetValue(value, kCFNumberIntType, &num);
 161     return num;
 162 }
 163
 164 wxArrayVideoModes wxDisplayImplMacOSX::GetModes(const wxVideoMode& mode) const
 165 {
 166     wxArrayVideoModes Modes;
 167
 168     CFArrayRef theArray = CGDisplayAvailableModes(m_id);
 169
 170     for(CFIndex i = 0; i < CFArrayGetCount(theArray); ++i)
 171     {
 172         CFDictionaryRef theValue = (CFDictionaryRef) CFArrayGetValueAtIndex(theArray, i);
 173
 174         wxVideoMode theMode(wxCFDictKeyToInt(theValue, kCGDisplayWidth),
 175                             wxCFDictKeyToInt(theValue, kCGDisplayHeight),
 176                             wxCFDictKeyToInt(theValue, kCGDisplayBitsPerPixel),
 177                             wxCFDictKeyToInt(theValue, kCGDisplayRefreshRate));
 178
 179         if (theMode.Matches(mode))
 180             Modes.Add(theMode);
 181     }
 182
 183     return Modes;
 184 }
 185
 186 wxVideoMode wxDisplayImplMacOSX::GetCurrentMode() const
 187 {
 188     CFDictionaryRef theValue = CGDisplayCurrentMode (m_id);
 189
 190     return wxVideoMode(wxCFDictKeyToInt(theValue, kCGDisplayWidth),
 191                             wxCFDictKeyToInt(theValue, kCGDisplayHeight),
 192                             wxCFDictKeyToInt(theValue, kCGDisplayBitsPerPixel),
 193                             wxCFDictKeyToInt(theValue, kCGDisplayRefreshRate));
 194 }
 195
 196 bool wxDisplayImplMacOSX::ChangeMode(const wxVideoMode& mode)
 197 {
 198     //Changing to default mode (wxDefualtVideoMode) doesn't
 199     //work because we don't have access to the system's 'scrn'
 200     //resource which holds the user's mode which the system
 201     //will return to after this app is done
 202     boolean_t bExactMatch;
 203     CFDictionaryRef theCGMode = CGDisplayBestModeForParametersAndRefreshRate (
 204                                         m_id,
 205                                         (size_t)mode.bpp,
 206                                         (size_t)mode.w,
 207                                         (size_t)mode.h,
 208                                         (double)mode.refresh,
 209                                         &bExactMatch);
 210
 211     bool bOK = bExactMatch;
 212
 213     if(bOK)
 214         bOK = CGDisplaySwitchToMode(m_id, theCGMode) == CGDisplayNoErr;
 215
 216     return bOK;
 217 }
 218
 219 // ============================================================================
 220 // wxDisplay::CreateFactory()
 221 // ============================================================================
 222
 223 /* static */ wxDisplayFactory *wxDisplay::CreateFactory()
 224 {
 225     return new wxDisplayFactoryMacOSX;
 226 }
 227
 228 #endif // wxUSE_DISPLAY
 229