widget/src/beos/nsScreenManagerBeOS.cpp

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  37
  38 #include "nsScreenManagerBeOS.h"
  39 #include "nsScreenBeOS.h"
  40
  41
  42 nsScreenManagerBeOS :: nsScreenManagerBeOS ( )
  43 {
  44   // nothing else to do. I guess we could cache a bunch of information
  45   // here, but we want to ask the device at runtime in case anything
  46   // has changed.
  47 }
  48
  49
  50 nsScreenManagerBeOS :: ~nsScreenManagerBeOS()
  51 {
  52   // nothing to see here.
  53 }
  54
  55
  56 // addref, release, QI
  57 NS_IMPL_ISUPPORTS1(nsScreenManagerBeOS, nsIScreenManager)
  58
  59
  60 //
  61 // CreateNewScreenObject
  62 //
  63 // Utility routine. Creates a new screen object from the given device handle
  64 //
  65 // NOTE: For this "single-monitor" impl, we just always return the cached primary
  66 //        screen. This should change when a multi-monitor impl is done.
  67 //
  68 nsIScreen*
  69 nsScreenManagerBeOS :: CreateNewScreenObject (  )
  70 {
  71   nsIScreen* retval = nsnull;
  72   if ( !mCachedMainScreen )
  73     mCachedMainScreen = new nsScreenBeOS ( );
  74   NS_IF_ADDREF(retval = mCachedMainScreen.get());
  75
  76   return retval;
  77 }
  78
  79
  80 //
  81 // ScreenForRect
  82 //
  83 // Returns the screen that contains the rectangle. If the rect overlaps
  84 // multiple screens, it picks the screen with the greatest area of intersection.
  85 //
  86 // The coordinates are in pixels (not twips) and in screen coordinates.
  87 //
  88 NS_IMETHODIMP
  89 nsScreenManagerBeOS :: ScreenForRect ( PRInt32 /*inLeft*/, PRInt32 /*inTop*/, PRInt32 /*inWidth*/,
  90                                        PRInt32 /*inHeight*/, nsIScreen **outScreen )
  91 {
  92   GetPrimaryScreen ( outScreen );
  93   return NS_OK;
  94
  95 } // ScreenForRect
  96
  97
  98 //
  99 // GetPrimaryScreen
 100 //
 101 // The screen with the menubar/taskbar. This shouldn't be needed very
 102 // often.
 103 //
 104 NS_IMETHODIMP
 105 nsScreenManagerBeOS :: GetPrimaryScreen(nsIScreen * *aPrimaryScreen)
 106 {
 107   *aPrimaryScreen = CreateNewScreenObject();    // addrefs
 108   return NS_OK;
 109
 110 } // GetPrimaryScreen
 111
 112
 113 //
 114 // GetNumberOfScreens
 115 //
 116 // Returns how many physical screens are available.
 117 //
 118 NS_IMETHODIMP
 119 nsScreenManagerBeOS :: GetNumberOfScreens(PRUint32 *aNumberOfScreens)
 120 {
 121   *aNumberOfScreens = 1;
 122   return NS_OK;
 123
 124 } // GetNumberOfScreens
 125
 126 NS_IMETHODIMP
 127 nsScreenManagerBeOS :: ScreenForNativeWidget(void *nativeWidget, nsIScreen **aScreen)
 128 {
 129   return NS_ERROR_NOT_IMPLEMENTED;
 130 }