include/wx/wizard.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/wizard.h
   3 // Purpose:     wxWizard class: a GUI control presenting the user with a
   4 //              sequence of dialogs which allows to simply perform some task
   5 // Author:      Vadim Zeitlin (partly based on work by Ron Kuris and Kevin B.
   6 //              Smith)
   7 // Modified by: Robert Cavanaugh
   8 //              Added capability to use .WXR resource files in Wizard pages
   9 //              Added wxWIZARD_HELP event
  10 //              Robert Vazan (sizers)
  11 // Created:     15.08.99
  12 // RCS-ID:      $Id$
  13 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  14 // Licence:     wxWindows licence
  15 ///////////////////////////////////////////////////////////////////////////////
  16
  17 #ifndef _WX_WIZARD_H_
  18 #define _WX_WIZARD_H_
  19
  20 #include "wx/defs.h"
  21
  22 #if wxUSE_WIZARDDLG
  23
  24 // ----------------------------------------------------------------------------
  25 // headers and other simple declarations
  26 // ----------------------------------------------------------------------------
  27
  28 #include "wx/dialog.h"      // the base class
  29 #include "wx/panel.h"       // ditto
  30 #include "wx/event.h"       // wxEVT_XXX constants
  31 #include "wx/bitmap.h"
  32
  33 // Extended style to specify a help button
  34 #define wxWIZARD_EX_HELPBUTTON   0x00000010
  35
  36 // Placement flags
  37 #define wxWIZARD_VALIGN_TOP       0x01
  38 #define wxWIZARD_VALIGN_CENTRE    0x02
  39 #define wxWIZARD_VALIGN_BOTTOM    0x04
  40 #define wxWIZARD_HALIGN_LEFT      0x08
  41 #define wxWIZARD_HALIGN_CENTRE    0x10
  42 #define wxWIZARD_HALIGN_RIGHT     0x20
  43 #define wxWIZARD_TILE             0x40
  44
  45 // forward declarations
  46 class WXDLLIMPEXP_FWD_ADV wxWizard;
  47
  48 // ----------------------------------------------------------------------------
  49 // wxWizardPage is one of the wizards screen: it must know what are the
  50 // following and preceding pages (which may be NULL for the first/last page).
  51 //
  52 // Other than GetNext/Prev() functions, wxWizardPage is just a panel and may be
  53 // used as such (i.e. controls may be placed directly on it &c).
  54 // ----------------------------------------------------------------------------
  55
  56 class WXDLLIMPEXP_ADV wxWizardPage : public wxPanel
  57 {
  58 public:
  59     wxWizardPage() { Init(); }
  60
  61     // ctor accepts an optional bitmap which will be used for this page instead
  62     // of the default one for this wizard (should be of the same size). Notice
  63     // that no other parameters are needed because the wizard will resize and
  64     // reposition the page anyhow
  65     wxWizardPage(wxWizard *parent,
  66                  const wxBitmap& bitmap = wxNullBitmap);
  67
  68     bool Create(wxWizard *parent,
  69                 const wxBitmap& bitmap = wxNullBitmap);
  70
  71     // these functions are used by the wizard to show another page when the
  72     // user chooses "Back" or "Next" button
  73     virtual wxWizardPage *GetPrev() const = 0;
  74     virtual wxWizardPage *GetNext() const = 0;
  75
  76     // default GetBitmap() will just return m_bitmap which is ok in 99% of
  77     // cases - override this method if you want to create the bitmap to be used
  78     // dynamically or to do something even more fancy. It's ok to return
  79     // wxNullBitmap from here - the default one will be used then.
  80     virtual wxBitmap GetBitmap() const { return m_bitmap; }
  81
  82 #if wxUSE_VALIDATORS
  83     // Override the base functions to allow a validator to be assigned to this page.
  84     virtual bool TransferDataToWindow()
  85     {
  86         return GetValidator() ? GetValidator()->TransferToWindow()
  87                               : wxPanel::TransferDataToWindow();
  88     }
  89
  90     virtual bool TransferDataFromWindow()
  91     {
  92         return GetValidator() ? GetValidator()->TransferFromWindow()
  93                               : wxPanel::TransferDataFromWindow();
  94     }
  95
  96     virtual bool Validate()
  97     {
  98         return GetValidator() ? GetValidator()->Validate(this)
  99                               : wxPanel::Validate();
 100     }
 101 #endif // wxUSE_VALIDATORS
 102
 103 protected:
 104     // common part of ctors:
 105     void Init();
 106
 107     wxBitmap m_bitmap;
 108
 109 private:
 110     DECLARE_DYNAMIC_CLASS_NO_COPY(wxWizardPage)
 111 };
 112
 113 // ----------------------------------------------------------------------------
 114 // wxWizardPageSimple just returns the pointers given to the ctor and is useful
 115 // to create a simple wizard where the order of pages never changes.
 116 //
 117 // OTOH, it is also possible to dynamicly decide which page to return (i.e.
 118 // depending on the user's choices) as the wizard sample shows - in order to do
 119 // this, you must derive from wxWizardPage directly.
 120 // ----------------------------------------------------------------------------
 121
 122 class WXDLLIMPEXP_ADV wxWizardPageSimple : public wxWizardPage
 123 {
 124 public:
 125     wxWizardPageSimple() { Init(); }
 126
 127     // ctor takes the previous and next pages
 128     wxWizardPageSimple(wxWizard *parent,
 129                        wxWizardPage *prev = NULL,
 130                        wxWizardPage *next = NULL,
 131                        const wxBitmap& bitmap = wxNullBitmap)
 132     {
 133         Create(parent, prev, next, bitmap);
 134     }
 135
 136     bool Create(wxWizard *parent = NULL, // let it be default ctor too
 137                 wxWizardPage *prev = NULL,
 138                 wxWizardPage *next = NULL,
 139                 const wxBitmap& bitmap = wxNullBitmap)
 140     {
 141         m_prev = prev;
 142         m_next = next;
 143         return wxWizardPage::Create(parent, bitmap);
 144     }
 145
 146     // the pointers may be also set later - but before starting the wizard
 147     void SetPrev(wxWizardPage *prev) { m_prev = prev; }
 148     void SetNext(wxWizardPage *next) { m_next = next; }
 149
 150     // Convenience functions to make the pages follow each other without having
 151     // to call their SetPrev() or SetNext() explicitly.
 152     wxWizardPageSimple& Chain(wxWizardPageSimple* next)
 153     {
 154         SetNext(next);
 155         next->SetPrev(this);
 156         return *next;
 157     }
 158
 159     static void Chain(wxWizardPageSimple *first, wxWizardPageSimple *second)
 160     {
 161         wxCHECK_RET( first && second,
 162                      wxT("NULL passed to wxWizardPageSimple::Chain") );
 163
 164         first->SetNext(second);
 165         second->SetPrev(first);
 166     }
 167
 168     // base class pure virtuals
 169     virtual wxWizardPage *GetPrev() const;
 170     virtual wxWizardPage *GetNext() const;
 171
 172 private:
 173     // common part of ctors:
 174     void Init()
 175     {
 176         m_prev = m_next = NULL;
 177     }
 178
 179     // pointers are private, the derived classes shouldn't mess with them -
 180     // just derive from wxWizardPage directly to implement different behaviour
 181     wxWizardPage *m_prev,
 182                  *m_next;
 183
 184     DECLARE_DYNAMIC_CLASS_NO_COPY(wxWizardPageSimple)
 185 };
 186
 187 // ----------------------------------------------------------------------------
 188 // wxWizard
 189 // ----------------------------------------------------------------------------
 190
 191 class WXDLLIMPEXP_ADV wxWizardBase : public wxDialog
 192 {
 193 public:
 194     /*
 195        The derived class (i.e. the real wxWizard) has a ctor and Create()
 196        function taking the following arguments:
 197
 198         wxWizard(wxWindow *parent,
 199                  int id = wxID_ANY,
 200                  const wxString& title = wxEmptyString,
 201                  const wxBitmap& bitmap = wxNullBitmap,
 202                  const wxPoint& pos = wxDefaultPosition,
 203                  long style = wxDEFAULT_DIALOG_STYLE);
 204     */
 205     wxWizardBase() { }
 206
 207     // executes the wizard starting from the given page, returns true if it was
 208     // successfully finished, false if user cancelled it
 209     virtual bool RunWizard(wxWizardPage *firstPage) = 0;
 210
 211     // get the current page (NULL if RunWizard() isn't running)
 212     virtual wxWizardPage *GetCurrentPage() const = 0;
 213
 214     // set the min size which should be available for the pages: a
 215     // wizard will take into account the size of the bitmap (if any)
 216     // itself and will never be less than some predefined fixed size
 217     virtual void SetPageSize(const wxSize& size) = 0;
 218
 219     // get the size available for the page
 220     virtual wxSize GetPageSize() const = 0;
 221
 222     // set the best size for the wizard, i.e. make it big enough to contain all
 223     // of the pages starting from the given one
 224     //
 225     // this function may be called several times and possible with different
 226     // pages in which case it will only increase the page size if needed (this
 227     // may be useful if not all pages are accessible from the first one by
 228     // default)
 229     virtual void FitToPage(const wxWizardPage *firstPage) = 0;
 230
 231     // Adding pages to page area sizer enlarges wizard
 232     virtual wxSizer *GetPageAreaSizer() const = 0;
 233
 234     // Set border around page area. Default is 0 if you add at least one
 235     // page to GetPageAreaSizer and 5 if you don't.
 236     virtual void SetBorder(int border) = 0;
 237
 238     // the methods below may be overridden by the derived classes to provide
 239     // custom logic for determining the pages order
 240
 241     virtual bool HasNextPage(wxWizardPage *page)
 242         { return page->GetNext() != NULL; }
 243
 244     virtual bool HasPrevPage(wxWizardPage *page)
 245         { return page->GetPrev() != NULL; }
 246
 247     /// Override these functions to stop InitDialog from calling TransferDataToWindow
 248     /// for _all_ pages when the wizard starts. Instead 'ShowPage' will call
 249     /// TransferDataToWindow for the first page only.
 250     bool TransferDataToWindow() { return true; }
 251     bool TransferDataFromWindow() { return true; }
 252     bool Validate() { return true; }
 253
 254 private:
 255     wxDECLARE_NO_COPY_CLASS(wxWizardBase);
 256 };
 257
 258 // include the real class declaration
 259 #include "wx/generic/wizard.h"
 260
 261 // ----------------------------------------------------------------------------
 262 // wxWizardEvent class represents an event generated by the wizard: this event
 263 // is first sent to the page itself and, if not processed there, goes up the
 264 // window hierarchy as usual
 265 // ----------------------------------------------------------------------------
 266
 267 class WXDLLIMPEXP_ADV wxWizardEvent : public wxNotifyEvent
 268 {
 269 public:
 270     wxWizardEvent(wxEventType type = wxEVT_NULL,
 271                   int id = wxID_ANY,
 272                   bool direction = true,
 273                   wxWizardPage* page = NULL);
 274
 275     // for EVT_WIZARD_PAGE_CHANGING, return true if we're going forward or
 276     // false otherwise and for EVT_WIZARD_PAGE_CHANGED return true if we came
 277     // from the previous page and false if we returned from the next one
 278     // (this function doesn't make sense for CANCEL events)
 279     bool GetDirection() const { return m_direction; }
 280
 281     wxWizardPage*   GetPage() const { return m_page; }
 282
 283     virtual wxEvent *Clone() const { return new wxWizardEvent(*this); }
 284
 285 private:
 286     bool m_direction;
 287     wxWizardPage*    m_page;
 288
 289     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxWizardEvent)
 290 };
 291
 292 // ----------------------------------------------------------------------------
 293 // macros for handling wxWizardEvents
 294 // ----------------------------------------------------------------------------
 295
 296 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_PAGE_CHANGED, wxWizardEvent );
 297 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_PAGE_CHANGING, wxWizardEvent );
 298 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_CANCEL, wxWizardEvent );
 299 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_HELP, wxWizardEvent );
 300 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_FINISHED, wxWizardEvent );
 301 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_PAGE_SHOWN, wxWizardEvent );
 302 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_ADV, wxEVT_WIZARD_BEFORE_PAGE_CHANGED, wxWizardEvent );
 303
 304 typedef void (wxEvtHandler::*wxWizardEventFunction)(wxWizardEvent&);
 305
 306 #define wxWizardEventHandler(func) \
 307     wxEVENT_HANDLER_CAST(wxWizardEventFunction, func)
 308
 309 #define wx__DECLARE_WIZARDEVT(evt, id, fn) \
 310     wx__DECLARE_EVT1(wxEVT_WIZARD_ ## evt, id, wxWizardEventHandler(fn))
 311
 312 // notifies that the page has just been changed (can't be vetoed)
 313 #define EVT_WIZARD_PAGE_CHANGED(id, fn) wx__DECLARE_WIZARDEVT(PAGE_CHANGED, id, fn)
 314
 315 // the user pressed "<Back" or "Next>" button and the page is going to be
 316 // changed - unless the event handler vetoes the event
 317 #define EVT_WIZARD_PAGE_CHANGING(id, fn) wx__DECLARE_WIZARDEVT(PAGE_CHANGING, id, fn)
 318
 319 // Called before GetNext/GetPrev is called, so that the handler can change state that will be
 320 // used when GetNext/GetPrev is called. PAGE_CHANGING is called too late to influence GetNext/GetPrev.
 321 #define EVT_WIZARD_BEFORE_PAGE_CHANGED(id, fn) wx__DECLARE_WIZARDEVT(BEFORE_PAGE_CHANGED, id, fn)
 322
 323 // the user pressed "Cancel" button and the wizard is going to be dismissed -
 324 // unless the event handler vetoes the event
 325 #define EVT_WIZARD_CANCEL(id, fn) wx__DECLARE_WIZARDEVT(CANCEL, id, fn)
 326
 327 // the user pressed "Finish" button and the wizard is going to be dismissed -
 328 #define EVT_WIZARD_FINISHED(id, fn) wx__DECLARE_WIZARDEVT(FINISHED, id, fn)
 329
 330 // the user pressed "Help" button
 331 #define EVT_WIZARD_HELP(id, fn) wx__DECLARE_WIZARDEVT(HELP, id, fn)
 332
 333 // the page was just shown and laid out
 334 #define EVT_WIZARD_PAGE_SHOWN(id, fn) wx__DECLARE_WIZARDEVT(PAGE_SHOWN, id, fn)
 335
 336 #endif // wxUSE_WIZARDDLG
 337
 338 #endif // _WX_WIZARD_H_