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lightning-sunbird  0.9+nobinonly
nsScreenManagerBeOS.cpp
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00037 
00038 #include "nsScreenManagerBeOS.h"
00039 #include "nsScreenBeOS.h"
00040 
00041 
00042 nsScreenManagerBeOS :: nsScreenManagerBeOS ( )
00043 {
00044   // nothing else to do. I guess we could cache a bunch of information
00045   // here, but we want to ask the device at runtime in case anything
00046   // has changed.
00047 }
00048 
00049 
00050 nsScreenManagerBeOS :: ~nsScreenManagerBeOS()
00051 {
00052   // nothing to see here.
00053 }
00054 
00055 
00056 // addref, release, QI
00057 NS_IMPL_ISUPPORTS1(nsScreenManagerBeOS, nsIScreenManager)
00058 
00059 
00060 //
00061 // CreateNewScreenObject
00062 //
00063 // Utility routine. Creates a new screen object from the given device handle
00064 //
00065 // NOTE: For this "single-monitor" impl, we just always return the cached primary
00066 //        screen. This should change when a multi-monitor impl is done.
00067 //
00068 nsIScreen* 
00069 nsScreenManagerBeOS :: CreateNewScreenObject (  )
00070 {
00071   nsIScreen* retval = nsnull;
00072   if ( !mCachedMainScreen )
00073     mCachedMainScreen = new nsScreenBeOS ( );
00074   NS_IF_ADDREF(retval = mCachedMainScreen.get());
00075   
00076   return retval;
00077 }
00078 
00079 
00080 //
00081 // ScreenForRect 
00082 //
00083 // Returns the screen that contains the rectangle. If the rect overlaps
00084 // multiple screens, it picks the screen with the greatest area of intersection.
00085 //
00086 // The coordinates are in pixels (not twips) and in screen coordinates.
00087 //
00088 NS_IMETHODIMP
00089 nsScreenManagerBeOS :: ScreenForRect ( PRInt32 /*inLeft*/, PRInt32 /*inTop*/, PRInt32 /*inWidth*/,
00090                                        PRInt32 /*inHeight*/, nsIScreen **outScreen )
00091 {
00092   GetPrimaryScreen ( outScreen );
00093   return NS_OK;
00094     
00095 } // ScreenForRect
00096 
00097 
00098 //
00099 // GetPrimaryScreen
00100 //
00101 // The screen with the menubar/taskbar. This shouldn't be needed very
00102 // often.
00103 //
00104 NS_IMETHODIMP 
00105 nsScreenManagerBeOS :: GetPrimaryScreen(nsIScreen * *aPrimaryScreen) 
00106 {
00107   *aPrimaryScreen = CreateNewScreenObject();    // addrefs  
00108   return NS_OK;
00109   
00110 } // GetPrimaryScreen
00111 
00112 
00113 //
00114 // GetNumberOfScreens
00115 //
00116 // Returns how many physical screens are available.
00117 //
00118 NS_IMETHODIMP
00119 nsScreenManagerBeOS :: GetNumberOfScreens(PRUint32 *aNumberOfScreens)
00120 {
00121   *aNumberOfScreens = 1;
00122   return NS_OK;
00123   
00124 } // GetNumberOfScreens
00125