include/wx/clipbrd.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/clipbrd.h
   3 // Purpose:     wxClipboad class and clipboard functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets Team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_CLIPBRD_H_BASE_
  13 #define _WX_CLIPBRD_H_BASE_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_CLIPBOARD
  18
  19
  20 #include "wx/event.h"
  21 #include "wx/chartype.h"
  22 #include "wx/vector.h"
  23
  24 class WXDLLIMPEXP_FWD_CORE wxDataFormat;
  25 class WXDLLIMPEXP_FWD_CORE wxDataObject;
  26 class WXDLLIMPEXP_FWD_CORE wxClipboard;
  27
  28 // ----------------------------------------------------------------------------
  29 // wxClipboard represents the system clipboard. Normally, you should use
  30 // wxTheClipboard which is a global pointer to the (unique) clipboard.
  31 //
  32 // Clipboard can be used to copy data to/paste data from. It works together
  33 // with wxDataObject.
  34 // ----------------------------------------------------------------------------
  35
  36 class WXDLLIMPEXP_CORE wxClipboardBase : public wxObject
  37 {
  38 public:
  39     wxClipboardBase() { m_usePrimary = false; }
  40
  41     // open the clipboard before Add/SetData() and GetData()
  42     virtual bool Open() = 0;
  43
  44     // close the clipboard after Add/SetData() and GetData()
  45     virtual void Close() = 0;
  46
  47     // query whether the clipboard is opened
  48     virtual bool IsOpened() const = 0;
  49
  50     // add to the clipboard data
  51     //
  52     // NB: the clipboard owns the pointer and will delete it, so data must be
  53     //     allocated on the heap
  54     virtual bool AddData( wxDataObject *data ) = 0;
  55
  56     // set the clipboard data, this is the same as Clear() followed by
  57     // AddData()
  58     virtual bool SetData( wxDataObject *data ) = 0;
  59
  60     // ask if data in correct format is available
  61     virtual bool IsSupported( const wxDataFormat& format ) = 0;
  62
  63     // ask if data in correct format is available
  64     virtual bool IsSupportedAsync( wxEvtHandler *sink );
  65
  66     // fill data with data on the clipboard (if available)
  67     virtual bool GetData( wxDataObject& data ) = 0;
  68
  69     // clears wxTheClipboard and the system's clipboard if possible
  70     virtual void Clear() = 0;
  71
  72     // flushes the clipboard: this means that the data which is currently on
  73     // clipboard will stay available even after the application exits (possibly
  74     // eating memory), otherwise the clipboard will be emptied on exit
  75     virtual bool Flush() { return false; }
  76
  77     // this allows to choose whether we work with CLIPBOARD (default) or
  78     // PRIMARY selection on X11-based systems
  79     //
  80     // on the other ones, working with primary selection does nothing: this
  81     // allows to write code which sets the primary selection when something is
  82     // selected without any ill effects (i.e. without overwriting the
  83     // clipboard which would be wrong on the platforms without X11 PRIMARY)
  84     virtual void UsePrimarySelection(bool usePrimary = false)
  85     {
  86         m_usePrimary = usePrimary;
  87     }
  88
  89     // return true if we're using primary selection
  90     bool IsUsingPrimarySelection() const { return m_usePrimary; }
  91
  92     // Returns global instance (wxTheClipboard) of the object:
  93     static wxClipboard *Get();
  94
  95
  96     // don't use this directly, it is public for compatibility with some ports
  97     // (wxX11, wxMotif, ...) only
  98     bool m_usePrimary;
  99 };
 100
 101 // ----------------------------------------------------------------------------
 102 // asynchronous clipboard event
 103 // ----------------------------------------------------------------------------
 104
 105 class WXDLLIMPEXP_CORE wxClipboardEvent : public wxEvent
 106 {
 107 public:
 108     wxClipboardEvent(wxEventType commandType = wxEVT_NULL)
 109         : wxEvent(0,commandType)
 110         { }
 111
 112     wxClipboardEvent(const wxClipboardEvent& event)
 113         : wxEvent(event),
 114           m_formats(event.m_formats)
 115         { }
 116
 117     bool SupportsFormat( const wxDataFormat &format ) const;
 118     void AddFormat( const wxDataFormat &format );
 119
 120     virtual wxEvent *Clone() const { return new wxClipboardEvent(*this); }
 121
 122 protected:
 123     wxVector<wxDataFormat> m_formats;
 124
 125 private:
 126     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxClipboardEvent)
 127 };
 128
 129 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_CLIPBOARD_CHANGED;
 130
 131 typedef void (wxEvtHandler::*wxClipboardEventFunction)(wxClipboardEvent&);
 132
 133 #define wxClipboardEventHandler(func) \
 134     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxClipboardEventFunction, &func)
 135
 136 #define EVT_CLIPBOARD_CHANGED(func) wx__DECLARE_EVT0(wxEVT_CLIPBOARD_CHANGED, wxClipboardEventHandler(func))
 137
 138 // ----------------------------------------------------------------------------
 139 // globals
 140 // ----------------------------------------------------------------------------
 141
 142 // The global clipboard object - backward compatible access macro:
 143 #define wxTheClipboard   (wxClipboard::Get())
 144
 145 // ----------------------------------------------------------------------------
 146 // include platform-specific class declaration
 147 // ----------------------------------------------------------------------------
 148
 149 #if defined(__WXMSW__)
 150     #include "wx/msw/clipbrd.h"
 151 #elif defined(__WXMOTIF__)
 152     #include "wx/motif/clipbrd.h"
 153 #elif defined(__WXGTK20__)
 154     #include "wx/gtk/clipbrd.h"
 155 #elif defined(__WXGTK__)
 156     #include "wx/gtk1/clipbrd.h"
 157 #elif defined(__WXX11__)
 158     #include "wx/x11/clipbrd.h"
 159 #elif defined(__WXMGL__)
 160     #include "wx/mgl/clipbrd.h"
 161 #elif defined(__WXMAC__)
 162     #include "wx/osx/clipbrd.h"
 163 #elif defined(__WXCOCOA__)
 164     #include "wx/cocoa/clipbrd.h"
 165 #elif defined(__WXPM__)
 166     #include "wx/os2/clipbrd.h"
 167 #endif
 168
 169 // ----------------------------------------------------------------------------
 170 // helpful class for opening the clipboard and automatically closing it
 171 // ----------------------------------------------------------------------------
 172
 173 class WXDLLIMPEXP_CORE wxClipboardLocker
 174 {
 175 public:
 176     wxClipboardLocker(wxClipboard *clipboard = (wxClipboard *)NULL)
 177     {
 178         m_clipboard = clipboard ? clipboard : wxTheClipboard;
 179         if ( m_clipboard )
 180         {
 181             m_clipboard->Open();
 182         }
 183     }
 184
 185     bool operator!() const { return !m_clipboard->IsOpened(); }
 186
 187     ~wxClipboardLocker()
 188     {
 189         if ( m_clipboard )
 190         {
 191             m_clipboard->Close();
 192         }
 193     }
 194
 195 private:
 196     wxClipboard *m_clipboard;
 197
 198     DECLARE_NO_COPY_CLASS(wxClipboardLocker)
 199 };
 200
 201 #endif // wxUSE_CLIPBOARD
 202
 203 #endif // _WX_CLIPBRD_H_BASE_