src/common/clipcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/clipcmn.cpp
   3 // Purpose:     common (to all ports) wxClipboard functions
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     28.06.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   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 #if wxUSE_CLIPBOARD
  28
  29 #include "wx/clipbrd.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/dataobj.h"
  33     #include "wx/module.h"
  34 #endif
  35
  36 // ---------------------------------------------------------
  37 // wxClipboardEvent
  38 // ---------------------------------------------------------
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxClipboardEvent,wxEvent)
  41
  42 wxDEFINE_EVENT( wxEVT_CLIPBOARD_CHANGED, wxClipboardEvent )
  43
  44 // notice that ctors are defined here and not inline to avoid having to include
  45 // wx/dataobj.h from wx/clipbrd.h
  46 wxClipboardEvent::wxClipboardEvent(wxEventType evtType)
  47     : wxEvent(0, evtType)
  48 {
  49 }
  50
  51 wxClipboardEvent::wxClipboardEvent(const wxClipboardEvent& event)
  52     : wxEvent(event),
  53       m_formats(event.m_formats)
  54 {
  55 }
  56
  57 bool wxClipboardEvent::SupportsFormat( const wxDataFormat &format ) const
  58 {
  59 #ifdef __WXGTK20__
  60     // GTK has an asynchronous API which reports the supported formats one by
  61     // one. We may have to add X11 and Motif later.
  62     for (wxVector<wxDataFormat>::size_type n = 0; n < m_formats.size(); n++)
  63     {
  64         if (m_formats[n] == format)
  65             return true;
  66     }
  67
  68     return false;
  69 #else
  70     // All other ports just query the clipboard directly
  71     // from here
  72     wxClipboard* clipboard = (wxClipboard*) GetEventObject();
  73     return clipboard->IsSupported( format );
  74 #endif
  75 }
  76
  77 void wxClipboardEvent::AddFormat(const wxDataFormat& format)
  78 {
  79     m_formats.push_back( format );
  80 }
  81
  82 // ---------------------------------------------------------
  83 // wxClipboardBase
  84 // ---------------------------------------------------------
  85
  86 static wxClipboard *gs_clipboard = NULL;
  87
  88 /*static*/ wxClipboard *wxClipboardBase::Get()
  89 {
  90     if ( !gs_clipboard )
  91     {
  92         gs_clipboard = new wxClipboard;
  93     }
  94     return gs_clipboard;
  95 }
  96
  97 bool wxClipboardBase::IsSupportedAsync( wxEvtHandler *sink )
  98 {
  99     // We just imitate an asynchronous API on most platforms.
 100     // This method is overridden uner GTK.
 101     wxClipboardEvent *event = new wxClipboardEvent(wxEVT_CLIPBOARD_CHANGED);
 102     event->SetEventObject( this );
 103
 104     sink->QueueEvent( event );
 105
 106     return true;
 107 }
 108
 109
 110 // ----------------------------------------------------------------------------
 111 // wxClipboardModule: module responsible for destroying the global clipboard
 112 // object
 113 // ----------------------------------------------------------------------------
 114
 115 class wxClipboardModule : public wxModule
 116 {
 117 public:
 118     bool OnInit() { return true; }
 119     void OnExit() { wxDELETE(gs_clipboard); }
 120
 121 private:
 122     DECLARE_DYNAMIC_CLASS(wxClipboardModule)
 123 };
 124
 125 IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule, wxModule)
 126
 127 #endif // wxUSE_CLIPBOARD