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