include/wx/msgdlg.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msgdlg.h
   3 // Purpose:     common header and base class for wxMessageDialog
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_MSGDLG_H_BASE_
  13 #define _WX_MSGDLG_H_BASE_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_MSGDLG
  18
  19 #include "wx/dialog.h"
  20 #include "wx/stockitem.h"
  21
  22 extern WXDLLIMPEXP_DATA_CORE(const char) wxMessageBoxCaptionStr[];
  23
  24 // ----------------------------------------------------------------------------
  25 // wxMessageDialogBase: base class defining wxMessageDialog interface
  26 // ----------------------------------------------------------------------------
  27
  28 class WXDLLIMPEXP_CORE wxMessageDialogBase : public wxDialog
  29 {
  30 public:
  31     // helper class for SetXXXLabels() methods: it makes it possible to pass
  32     // either a stock id (wxID_CLOSE) or a string ("&Close") to them
  33     class ButtonLabel
  34     {
  35     public:
  36         // ctors are not explicit, objects of this class can be implicitly
  37         // constructed from either stock ids or strings
  38         ButtonLabel(int stockId)
  39             : m_stockId(stockId)
  40         {
  41             wxASSERT_MSG( wxIsStockID(stockId), "invalid stock id" );
  42         }
  43
  44         ButtonLabel(const wxString& label)
  45             : m_label(label), m_stockId(wxID_NONE)
  46         {
  47         }
  48
  49         ButtonLabel(const char *label)
  50             : m_label(label), m_stockId(wxID_NONE)
  51         {
  52         }
  53
  54         ButtonLabel(const wchar_t *label)
  55             : m_label(label), m_stockId(wxID_NONE)
  56         {
  57         }
  58
  59         ButtonLabel(const wxCStrData& label)
  60             : m_label(label), m_stockId(wxID_NONE)
  61         {
  62         }
  63
  64         // default copy ctor and dtor are ok
  65
  66         // get the string label, whether it was originally specified directly
  67         // or as a stock id -- this is only useful for platforms without native
  68         // stock items id support
  69         wxString GetAsString() const
  70         {
  71             return m_stockId == wxID_NONE
  72                     ? m_label
  73                     : wxGetStockLabel(m_stockId, wxSTOCK_FOR_BUTTON);
  74         }
  75
  76         // return the stock id or wxID_NONE if this is not a stock label
  77         int GetStockId() const { return m_stockId; }
  78
  79     private:
  80         // the label if explicitly given or empty if this is a stock item
  81         const wxString m_label;
  82
  83         // the stock item id or wxID_NONE if m_label should be used
  84         const int m_stockId;
  85     };
  86
  87     // ctors
  88     wxMessageDialogBase() { m_dialogStyle = 0; }
  89     wxMessageDialogBase(wxWindow *parent,
  90                         const wxString& message,
  91                         const wxString& caption,
  92                         long style)
  93         : m_message(message),
  94           m_caption(caption)
  95     {
  96         m_parent = parent;
  97         SetMessageDialogStyle(style);
  98     }
  99
 100     // virtual dtor for the base class
 101     virtual ~wxMessageDialogBase() { }
 102
 103     wxString GetCaption() const { return m_caption; }
 104
 105     virtual void SetMessage(const wxString& message)
 106     {
 107         m_message = message;
 108     }
 109
 110     wxString GetMessage() const { return m_message; }
 111
 112     void SetExtendedMessage(const wxString& extendedMessage)
 113     {
 114         m_extendedMessage = extendedMessage;
 115     }
 116
 117     wxString GetExtendedMessage() const { return m_extendedMessage; }
 118
 119     // change the dialog style flag
 120     void SetMessageDialogStyle(long style)
 121     {
 122         wxASSERT_MSG( ((style & wxYES_NO) == wxYES_NO) || !(style & wxYES_NO),
 123                       "wxYES and wxNO may only be used together" );
 124
 125         wxASSERT_MSG( !(style & wxYES) || !(style & wxOK),
 126                       "wxOK and wxYES/wxNO can't be used together" );
 127
 128         // It is common to specify just the icon, without wxOK, in the existing
 129         // code, especially one written by Windows programmers as MB_OK is 0
 130         // and so they're used to omitting wxOK. Don't complain about it but
 131         // just add wxOK implicitly for compatibility.
 132         if ( !(style & wxYES) && !(style & wxOK) )
 133             style |= wxOK;
 134
 135         wxASSERT_MSG( (style & wxID_OK) != wxID_OK,
 136                       "wxMessageBox: Did you mean wxOK (and not wxID_OK)?" );
 137
 138         wxASSERT_MSG( !(style & wxNO_DEFAULT) || (style & wxNO),
 139                       "wxNO_DEFAULT is invalid without wxNO" );
 140
 141         wxASSERT_MSG( !(style & wxCANCEL_DEFAULT) || (style & wxCANCEL),
 142                       "wxCANCEL_DEFAULT is invalid without wxCANCEL" );
 143
 144         wxASSERT_MSG( !(style & wxCANCEL_DEFAULT) || !(style & wxNO_DEFAULT),
 145                       "only one default button can be specified" );
 146
 147         m_dialogStyle = style;
 148     }
 149
 150     long GetMessageDialogStyle() const { return m_dialogStyle; }
 151
 152     // customization of the message box buttons
 153     virtual bool SetYesNoLabels(const ButtonLabel& yes,const ButtonLabel& no)
 154     {
 155         DoSetCustomLabel(m_yes, yes);
 156         DoSetCustomLabel(m_no, no);
 157         return true;
 158     }
 159
 160     virtual bool SetYesNoCancelLabels(const ButtonLabel& yes,
 161                                       const ButtonLabel& no,
 162                                       const ButtonLabel& cancel)
 163     {
 164         DoSetCustomLabel(m_yes, yes);
 165         DoSetCustomLabel(m_no, no);
 166         DoSetCustomLabel(m_cancel, cancel);
 167         return true;
 168     }
 169
 170     virtual bool SetOKLabel(const ButtonLabel& ok)
 171     {
 172         DoSetCustomLabel(m_ok, ok);
 173         return true;
 174     }
 175
 176     virtual bool SetOKCancelLabels(const ButtonLabel& ok,
 177                                    const ButtonLabel& cancel)
 178     {
 179         DoSetCustomLabel(m_ok, ok);
 180         DoSetCustomLabel(m_cancel, cancel);
 181         return true;
 182     }
 183
 184     virtual bool SetHelpLabel(const ButtonLabel& help)
 185     {
 186         DoSetCustomLabel(m_help, help);
 187         return true;
 188     }
 189
 190     // test if any custom labels were set
 191     bool HasCustomLabels() const
 192     {
 193         return !(m_ok.empty() && m_cancel.empty() && m_help.empty() &&
 194                  m_yes.empty() && m_no.empty());
 195     }
 196
 197     // these functions return the label to be used for the button which is
 198     // either a custom label explicitly set by the user or the default label,
 199     // i.e. they always return a valid string
 200     wxString GetYesLabel() const
 201         { return m_yes.empty() ? GetDefaultYesLabel() : m_yes; }
 202     wxString GetNoLabel() const
 203         { return m_no.empty() ? GetDefaultNoLabel() : m_no; }
 204     wxString GetOKLabel() const
 205         { return m_ok.empty() ? GetDefaultOKLabel() : m_ok; }
 206     wxString GetCancelLabel() const
 207         { return m_cancel.empty() ? GetDefaultCancelLabel() : m_cancel; }
 208     wxString GetHelpLabel() const
 209         { return m_help.empty() ? GetDefaultHelpLabel() : m_help; }
 210
 211     // based on message dialog style, returns exactly one of: wxICON_NONE,
 212     // wxICON_ERROR, wxICON_WARNING, wxICON_QUESTION, wxICON_INFORMATION
 213     long GetEffectiveIcon() const
 214     {
 215         if ( m_dialogStyle & wxICON_NONE )
 216             return wxICON_NONE;
 217         else if ( m_dialogStyle & wxICON_ERROR )
 218             return wxICON_ERROR;
 219         else if ( m_dialogStyle & wxICON_WARNING )
 220             return wxICON_WARNING;
 221         else if ( m_dialogStyle & wxICON_QUESTION )
 222             return wxICON_QUESTION;
 223         else if ( m_dialogStyle & wxICON_INFORMATION )
 224             return wxICON_INFORMATION;
 225         else if ( m_dialogStyle & wxYES )
 226             return wxICON_QUESTION;
 227         else
 228             return wxICON_INFORMATION;
 229     }
 230
 231 protected:
 232     // for the platforms not supporting separate main and extended messages
 233     // this function should be used to combine both of them in a single string
 234     wxString GetFullMessage() const
 235     {
 236         wxString msg = m_message;
 237         if ( !m_extendedMessage.empty() )
 238             msg << "\n\n" << m_extendedMessage;
 239
 240         return msg;
 241     }
 242
 243     wxString m_message,
 244              m_extendedMessage,
 245              m_caption;
 246     long m_dialogStyle;
 247
 248     // this function is called by our public SetXXXLabels() and should assign
 249     // the value to var with possibly some transformation (e.g. Cocoa version
 250     // currently uses this to remove any accelerators from the button strings
 251     // while GTK+ one handles stock items specifically here)
 252     virtual void DoSetCustomLabel(wxString& var, const ButtonLabel& label)
 253     {
 254         var = label.GetAsString();
 255     }
 256
 257     // these functions return the custom label or empty string and should be
 258     // used only in specific circumstances such as creating the buttons with
 259     // these labels (in which case it makes sense to only use a custom label if
 260     // it was really given and fall back on stock label otherwise), use the
 261     // Get{Yes,No,OK,Cancel}Label() methods above otherwise
 262     const wxString& GetCustomYesLabel() const { return m_yes; }
 263     const wxString& GetCustomNoLabel() const { return m_no; }
 264     const wxString& GetCustomOKLabel() const { return m_ok; }
 265     const wxString& GetCustomHelpLabel() const { return m_help; }
 266     const wxString& GetCustomCancelLabel() const { return m_cancel; }
 267
 268 private:
 269     // these functions may be overridden to provide different defaults for the
 270     // default button labels (this is used by wxGTK)
 271     virtual wxString GetDefaultYesLabel() const { return wxGetTranslation("Yes"); }
 272     virtual wxString GetDefaultNoLabel() const { return wxGetTranslation("No"); }
 273     virtual wxString GetDefaultOKLabel() const { return wxGetTranslation("OK"); }
 274     virtual wxString GetDefaultCancelLabel() const { return wxGetTranslation("Cancel"); }
 275     virtual wxString GetDefaultHelpLabel() const { return wxGetTranslation("Help"); }
 276
 277     // labels for the buttons, initially empty meaning that the defaults should
 278     // be used, use GetYes/No/OK/CancelLabel() to access them
 279     wxString m_yes,
 280              m_no,
 281              m_ok,
 282              m_cancel,
 283              m_help;
 284
 285     wxDECLARE_NO_COPY_CLASS(wxMessageDialogBase);
 286 };
 287
 288 #include "wx/generic/msgdlgg.h"
 289
 290 #if defined(__WX_COMPILING_MSGDLGG_CPP__) || \
 291     defined(__WXUNIVERSAL__) || defined(__WXGPE__) || \
 292     (defined(__WXGTK__) && !defined(__WXGTK20__))
 293
 294     #define wxMessageDialog wxGenericMessageDialog
 295 #elif defined(__WXCOCOA__)
 296     #include "wx/cocoa/msgdlg.h"
 297 #elif defined(__WXMSW__)
 298     #include "wx/msw/msgdlg.h"
 299 #elif defined(__WXMOTIF__)
 300     #include "wx/motif/msgdlg.h"
 301 #elif defined(__WXGTK20__)
 302     #include "wx/gtk/msgdlg.h"
 303 #elif defined(__WXMAC__)
 304     #include "wx/osx/msgdlg.h"
 305 #elif defined(__WXPM__)
 306     #include "wx/os2/msgdlg.h"
 307 #endif
 308
 309 // ----------------------------------------------------------------------------
 310 // wxMessageBox: the simplest way to use wxMessageDialog
 311 // ----------------------------------------------------------------------------
 312
 313 int WXDLLIMPEXP_CORE wxMessageBox(const wxString& message,
 314                              const wxString& caption = wxMessageBoxCaptionStr,
 315                              long style = wxOK | wxCENTRE,
 316                              wxWindow *parent = NULL,
 317                              int x = wxDefaultCoord, int y = wxDefaultCoord);
 318
 319 #endif // wxUSE_MSGDLG
 320
 321 #endif // _WX_MSGDLG_H_BASE_