src/osx/carbon/overlay.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/overlay.cpp
   3 // Purpose:     common wxOverlay code
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-20
   7 // Copyright:   (c) wxWidgets team
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #include "wx/overlay.h"
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/dcclient.h"
  30 #endif
  31
  32 #include "wx/private/overlay.h"
  33
  34 #ifdef wxHAS_NATIVE_OVERLAY
  35
  36 // ============================================================================
  37 // implementation
  38 // ============================================================================
  39
  40 wxOverlayImpl::wxOverlayImpl()
  41 {
  42     m_window = NULL ;
  43     m_overlayContext = NULL ;
  44     m_overlayWindow = NULL ;
  45 }
  46
  47 wxOverlayImpl::~wxOverlayImpl()
  48 {
  49     Reset();
  50 }
  51
  52 bool wxOverlayImpl::IsOk()
  53 {
  54     return m_overlayWindow != NULL ;
  55 }
  56
  57 void wxOverlayImpl::MacGetBounds( Rect *bounds )
  58 {
  59     int x, y;
  60     x=y=0;
  61     m_window->MacWindowToRootWindow( &x , &y ) ;
  62     wxNonOwnedWindow* tlw = m_window->MacGetTopLevelWindow();
  63     tlw->GetNonOwnedPeer()->WindowToScreen( &x, &y );
  64
  65     bounds->top = y+m_y;
  66     bounds->left = x+m_x;
  67     bounds->bottom = y+m_y+m_height;
  68     bounds->right = x+m_x+m_width;
  69 }
  70
  71 OSStatus wxOverlayImpl::CreateOverlayWindow()
  72 {
  73     OSStatus err;
  74
  75     WindowAttributes overlayAttributes  = kWindowIgnoreClicksAttribute;
  76
  77     if ( m_window )
  78     {
  79         m_overlayParentWindow =(WindowRef) m_window->MacGetTopLevelWindowRef();
  80
  81         Rect bounds ;
  82         MacGetBounds(&bounds);
  83         err  = CreateNewWindow( kOverlayWindowClass, overlayAttributes, &bounds, &m_overlayWindow );
  84         if ( err == noErr )
  85         {
  86             SetWindowGroup( m_overlayWindow, GetWindowGroup(m_overlayParentWindow));    //  Put them in the same group so that their window layers are consistent
  87         }
  88     }
  89     else
  90     {
  91         m_overlayParentWindow = NULL ;
  92         CGRect cgbounds ;
  93         cgbounds = CGDisplayBounds(CGMainDisplayID());
  94         Rect bounds;
  95         bounds.top = (short)cgbounds.origin.y;
  96         bounds.left = (short)cgbounds.origin.x;
  97         bounds.bottom = (short)(bounds.top + cgbounds.size.height);
  98         bounds.right = (short)(bounds.left  + cgbounds.size.width);
  99         err  = CreateNewWindow( kOverlayWindowClass, overlayAttributes, &bounds, &m_overlayWindow );
 100     }
 101     ShowWindow(m_overlayWindow);
 102     return err;
 103 }
 104
 105 void wxOverlayImpl::Init( wxDC* dc, int x , int y , int width , int height )
 106 {
 107     wxASSERT_MSG( !IsOk() , _("You cannot Init an overlay twice") );
 108
 109     m_window = dc->GetWindow();
 110     m_x = x ;
 111     m_y = y ;
 112     if ( dc->IsKindOf( CLASSINFO( wxClientDC ) ))
 113     {
 114         wxPoint origin = m_window->GetClientAreaOrigin();
 115         m_x += origin.x;
 116         m_y += origin.y;
 117     }
 118     m_width = width ;
 119     m_height = height ;
 120
 121     OSStatus err = CreateOverlayWindow();
 122     wxASSERT_MSG(  err == noErr , _("Couldn't create the overlay window") );
 123 #ifndef __LP64__
 124     err = QDBeginCGContext(GetWindowPort(m_overlayWindow), &m_overlayContext);
 125 #endif
 126     CGContextTranslateCTM( m_overlayContext, 0, m_height );
 127     CGContextScaleCTM( m_overlayContext, 1, -1 );
 128     CGContextTranslateCTM( m_overlayContext, -m_x , -m_y );
 129     wxASSERT_MSG(  err == noErr , _("Couldn't init the context on the overlay window") );
 130 }
 131
 132 void wxOverlayImpl::BeginDrawing( wxDC* dc)
 133 {
 134     wxDCImpl *impl = dc->GetImpl();
 135     wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
 136     if (win_impl)
 137     {
 138         win_impl->SetGraphicsContext( wxGraphicsContext::CreateFromNative( m_overlayContext ) );
 139         dc->SetClippingRegion( m_x , m_y , m_width , m_height ) ;
 140     }
 141 }
 142
 143 void wxOverlayImpl::EndDrawing( wxDC* dc)
 144 {
 145     wxDCImpl *impl = dc->GetImpl();
 146     wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
 147     if (win_impl)
 148         win_impl->SetGraphicsContext(NULL);
 149
 150     CGContextFlush( m_overlayContext );
 151 }
 152
 153 void wxOverlayImpl::Clear(wxDC* WXUNUSED(dc))
 154 {
 155     wxASSERT_MSG( IsOk() , _("You cannot Clear an overlay that is not inited") );
 156     CGRect box  = CGRectMake( m_x - 1, m_y - 1 , m_width + 2 , m_height + 2 );
 157     CGContextClearRect( m_overlayContext, box );
 158 }
 159
 160 void wxOverlayImpl::Reset()
 161 {
 162     if ( m_overlayContext )
 163     {
 164 #ifndef __LP64__
 165         OSStatus err = QDEndCGContext(GetWindowPort(m_overlayWindow), &m_overlayContext);
 166         if ( err != noErr )
 167         {
 168             wxFAIL_MSG("Couldn't end the context on the overlay window");
 169         }
 170 #endif
 171         m_overlayContext = NULL ;
 172     }
 173
 174     // todo : don't dispose, only hide and reposition on next run
 175     if (m_overlayWindow)
 176     {
 177         DisposeWindow(m_overlayWindow);
 178         m_overlayWindow = NULL ;
 179     }
 180 }
 181
 182 #endif // wxHAS_NATIVE_OVERLAY