samples/clipboard/clipboard.cpp

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