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( wxWindowDC* 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( wxWindowDC* dc)
 136 {
 137     wxDCImpl *impl = dc->GetImpl();
 138     wxWindowDCImpl *win_impl = wxDynamicCast(impl,wxWindowDCImpl);
 139     if (win_impl)
 140     {
 141         win_impl->SetGraphicsContext( wxGraphicsContext::CreateFromNative( m_overlayContext ) );
 142         wxSize size = dc->GetSize() ;
 143         dc->SetClippingRegion( 0 , 0 , size.x , size.y ) ;
 144     }
 145 }
 146
 147 void wxOverlayImpl::EndDrawing( wxWindowDC* dc)
 148 {
 149     wxDCImpl *impl = dc->GetImpl();
 150     wxWindowDCImpl *win_impl = wxDynamicCast(impl,wxWindowDCImpl);
 151     if (win_impl)
 152         win_impl->SetGraphicsContext(NULL);
 153
 154     CGContextFlush( m_overlayContext );
 155 }
 156
 157 void wxOverlayImpl::Clear(wxWindowDC* WXUNUSED(dc))
 158 {
 159     wxASSERT_MSG( IsOk() , _("You cannot Clear an overlay that is not inited") );
 160     CGRect box  = CGRectMake( m_x - 1, m_y - 1 , m_width + 2 , m_height + 2 );
 161     CGContextClearRect( m_overlayContext, box );
 162 }
 163
 164 void wxOverlayImpl::Reset()
 165 {
 166     if ( m_overlayContext )
 167     {
 168 #ifndef __LP64__
 169         OSStatus err = QDEndCGContext(GetWindowPort(m_overlayWindow), &m_overlayContext);
 170         wxASSERT_MSG(  err == noErr , _("Couldn't end the context on the overlay window") );
 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