samples/clipboard/clipboard.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipboard.cpp
   3 // Purpose:     clipboard wxWidgets sample
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx/wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #ifdef __BORLANDC__
  14     #pragma hdrstop
  15 #endif
  16
  17 // for all others, include the necessary headers (this file is usually all you
  18 // need because it includes almost all "standard" wxWidgets headers)
  19 #ifndef WX_PRECOMP
  20     #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/clipbrd.h"
  24
  25 #ifndef wxHAS_IMAGES_IN_RESOURCES
  26     #include "../sample.xpm"
  27 #endif
  28
  29
  30 #define USE_ASYNCHRONOUS_CLIPBOARD_REQUEST  0
  31
  32 class MyApp : public wxApp
  33 {
  34 public:
  35     virtual bool OnInit();
  36 };
  37
  38 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
  39 enum AsyncRequestState
  40 {
  41    Idle,
  42    Waiting,
  43    Finished
  44 };
  45 #endif
  46
  47 class MyFrame : public wxFrame
  48 {
  49 public:
  50     MyFrame(const wxString& title);
  51
  52     void OnQuit(wxCommandEvent&event);
  53     void OnAbout(wxCommandEvent&event);
  54     void OnWriteClipboardContents(wxCommandEvent&event);
  55     void OnUpdateUI(wxUpdateUIEvent&event);
  56 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
  57     void OnClipboardChange(wxClipboardEvent&event);
  58 #endif
  59
  60 private:
  61     wxTextCtrl        *m_textctrl;
  62 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
  63     AsyncRequestState  m_request;
  64     bool               m_clipboardSupportsText;
  65 #endif
  66
  67     DECLARE_EVENT_TABLE()
  68 };
  69
  70 enum
  71 {
  72     ID_Quit   = wxID_EXIT,
  73     ID_About  = wxID_ABOUT,
  74     ID_Write  = 100,
  75     ID_Text   = 101
  76 };
  77
  78 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  79     EVT_MENU(ID_Quit,  MyFrame::OnQuit)
  80     EVT_MENU(ID_About, MyFrame::OnAbout)
  81     EVT_BUTTON(ID_Write, MyFrame::OnWriteClipboardContents)
  82     EVT_UPDATE_UI(ID_Write, MyFrame::OnUpdateUI)
  83 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
  84     EVT_CLIPBOARD_CHANGED(MyFrame::OnClipboardChange)
  85 #endif
  86 END_EVENT_TABLE()
  87
  88 IMPLEMENT_APP(MyApp)
  89
  90 bool MyApp::OnInit()
  91 {
  92     if ( !wxApp::OnInit() )
  93         return false;
  94
  95     MyFrame *frame = new MyFrame("wxClipboard sample");
  96     frame->Show(true);
  97
  98     return true;
  99 }
 100
 101 MyFrame::MyFrame(const wxString& title)
 102        : wxFrame(NULL, wxID_ANY, title)
 103 {
 104     // set the frame icon
 105     SetIcon(wxICON(sample));
 106
 107 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
 108     m_request = Idle;
 109     m_clipboardSupportsText = false;
 110 #endif
 111
 112 #if wxUSE_MENUS
 113     // create a menu bar
 114     wxMenu *fileMenu = new wxMenu;
 115
 116     // the "About" item should be in the help menu
 117     wxMenu *helpMenu = new wxMenu;
 118     helpMenu->Append(ID_About, "&About\tF1", "Show about dialog");
 119
 120     fileMenu->Append(ID_Quit, "E&xit\tAlt-X", "Quit this program");
 121
 122     // now append the freshly created menu to the menu bar...
 123     wxMenuBar *menuBar = new wxMenuBar();
 124     menuBar->Append(fileMenu, "&File");
 125     menuBar->Append(helpMenu, "&Help");
 126
 127     // ... and attach this menu bar to the frame
 128     SetMenuBar(menuBar);
 129 #endif // wxUSE_MENUS
 130
 131     wxPanel *panel = new wxPanel( this, -1 );
 132
 133     wxBoxSizer *main_sizer = new wxBoxSizer( wxVERTICAL );
 134     main_sizer->Add( new wxButton( panel, ID_Write, "Get clipboard text" ), 0, wxALL, 5 );
 135     m_textctrl = new wxTextCtrl( panel, ID_Text, "", wxDefaultPosition,
 136       wxDefaultSize, wxTE_MULTILINE );
 137     main_sizer->Add( m_textctrl, 1, wxGROW );
 138     panel->SetSizer( main_sizer );
 139 }
 140
 141 void MyFrame::OnWriteClipboardContents(wxCommandEvent& WXUNUSED(event))
 142 {
 143    if (wxTheClipboard->Open())
 144    {
 145         if (wxTheClipboard->IsSupported( wxDF_UNICODETEXT ))
 146         {
 147             wxTextDataObject data;
 148             wxTheClipboard->GetData( data );
 149             m_textctrl->Clear();
 150             m_textctrl->SetValue( data.GetText() );
 151
 152         }
 153         wxTheClipboard->Close();
 154    }
 155 }
 156
 157 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
 158 void MyFrame::OnClipboardChange(wxClipboardEvent&event)
 159 {
 160     m_clipboardSupportsText = event.SupportsFormat( wxDF_UNICODETEXT );
 161     m_request = Finished;
 162 }
 163 #endif
 164
 165 void MyFrame::OnUpdateUI(wxUpdateUIEvent&event)
 166 {
 167 #if USE_ASYNCHRONOUS_CLIPBOARD_REQUEST
 168     if (m_request == Idle)
 169     {
 170         if (!wxTheClipboard->IsSupportedAsync( this ))
 171         {
 172             // request failed, try again later
 173             event.Enable( m_clipboardSupportsText ); // not yet known, assume last value
 174             return;
 175         }
 176         m_request = Waiting;
 177         event.Enable( m_clipboardSupportsText ); // not yet known, assume last value
 178     }
 179     else if (m_request == Waiting)
 180     {
 181         event.Enable( m_clipboardSupportsText ); // not yet known, assume last value
 182     }
 183     else if (m_request == Finished)
 184     {
 185         event.Enable( m_clipboardSupportsText );
 186         m_request = Idle;
 187     }
 188 #else
 189     event.Enable( wxTheClipboard->IsSupported( wxDF_UNICODETEXT ) );
 190 #endif
 191 }
 192
 193 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 194 {
 195     // true is to force the frame to close
 196     Close(true);
 197 }
 198
 199 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 200 {
 201     wxMessageBox("Clipboard sample", "About clipboard", wxOK|wxICON_INFORMATION, this);
 202 }
 203
 204