src/mac/carbon/overlay.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/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     WindowRef window = (WindowRef) m_window->MacGetTopLevelWindowRef() ;
  64
  65     Point localwhere = { y, x };
  66     wxMacLocalToGlobal( window, &localwhere ) ;
  67
  68     bounds->top = localwhere.v+m_y;
  69     bounds->left = localwhere.h+m_x;
  70     bounds->bottom = localwhere.v+m_y+m_height;
  71     bounds->right = localwhere.h+m_x+m_width;
  72 }
  73
  74 OSStatus wxOverlayImpl::CreateOverlayWindow()
  75 {
  76     OSStatus err;
  77
  78     WindowAttributes overlayAttributes  = kWindowIgnoreClicksAttribute;
  79
  80     if ( m_window )
  81     {
  82         m_overlayParentWindow =(WindowRef) m_window->MacGetTopLevelWindowRef();
  83
  84         Rect bounds ;
  85         MacGetBounds(&bounds);
  86         err  = CreateNewWindow( kOverlayWindowClass, overlayAttributes, &bounds, &m_overlayWindow );
  87         if ( err == noErr )
  88         {
  89             SetWindowGroup( m_overlayWindow, GetWindowGroup(m_overlayParentWindow));    //  Put them in the same group so that their window layers are consistent
  90         }
  91     }
  92     else
  93     {
  94         m_overlayParentWindow = NULL ;
  95         CGRect cgbounds ;
  96         cgbounds = CGDisplayBounds(CGMainDisplayID());
  97         Rect bounds;
  98         bounds.top = (short)cgbounds.origin.y;
  99         bounds.left = (short)cgbounds.origin.x;
 100         bounds.bottom = (short)(bounds.top + cgbounds.size.height);
 101         bounds.right = (short)(bounds.left  + cgbounds.size.width);
 102         err  = CreateNewWindow( kOverlayWindowClass, overlayAttributes, &bounds, &m_overlayWindow );
 103     }
 104     ShowWindow(m_overlayWindow);
 105     return err;
 106 }
 107
 108 void wxOverlayImpl::Init( wxDC* dc, int x , int y , int width , int height )
 109 {
 110     wxASSERT_MSG( !IsOk() , _("You cannot Init an overlay twice") );
 111
 112     m_window = dc->GetWindow();
 113     m_x = x ;
 114     m_y = y ;
 115     if ( dc->IsKindOf( CLASSINFO( wxClientDC ) ))
 116     {
 117         wxPoint origin = m_window->GetClientAreaOrigin();
 118         m_x += origin.x;
 119         m_y += origin.y;
 120     }
 121     m_width = width ;
 122     m_height = height ;
 123
 124     OSStatus err = CreateOverlayWindow();
 125     wxASSERT_MSG(  err == noErr , _("Couldn't create the overlay window") );
 126 #ifndef __LP64__
 127     err = QDBeginCGContext(GetWindowPort(m_overlayWindow), &m_overlayContext);
 128 #endif
 129     CGContextTranslateCTM( m_overlayContext, 0, m_height );
 130     CGContextScaleCTM( m_overlayContext, 1, -1 );
 131     CGContextTranslateCTM( m_overlayContext, -m_x , -m_y );
 132     wxASSERT_MSG(  err == noErr , _("Couldn't init the context on the overlay window") );
 133 }
 134
 135 void wxOverlayImpl::BeginDrawing( wxDC* dc)
 136 {
 137     wxDCImpl *impl = dc->GetImpl();
 138     wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
 139     if (win_impl)
 140     {
 141         win_impl->SetGraphicsContext( wxGraphicsContext::CreateFromNative( m_overlayContext ) );
 142         dc->SetClippingRegion( m_x , m_y , m_width , m_height ) ;
 143     }
 144 }
 145
 146 void wxOverlayImpl::EndDrawing( wxDC* dc)
 147 {
 148     wxDCImpl *impl = dc->GetImpl();
 149     wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
 150     if (win_impl)
 151         win_impl->SetGraphicsContext(NULL);
 152
 153     CGContextFlush( m_overlayContext );
 154 }
 155
 156 void wxOverlayImpl::Clear(wxDC* WXUNUSED(dc))
 157 {
 158     wxASSERT_MSG( IsOk() , _("You cannot Clear an overlay that is not inited") );
 159     CGRect box  = CGRectMake( m_x - 1, m_y - 1 , m_width + 2 , m_height + 2 );
 160     CGContextClearRect( m_overlayContext, box );
 161 }
 162
 163 void wxOverlayImpl::Reset()
 164 {
 165     if ( m_overlayContext )
 166     {
 167 #ifndef __LP64__
 168         OSStatus err = QDEndCGContext(GetWindowPort(m_overlayWindow), &m_overlayContext);
 169         if ( err != noErr )
 170         {
 171             wxFAIL_MSG("Couldn't end the context on the overlay window");
 172         }
 173 #endif
 174         m_overlayContext = NULL ;
 175     }
 176
 177     // todo : don't dispose, only hide and reposition on next run
 178     if (m_overlayWindow)
 179     {
 180         DisposeWindow(m_overlayWindow);
 181         m_overlayWindow = NULL ;
 182     }
 183 }
 184
 185 #endif // wxHAS_NATIVE_OVERLAY