include/wx/wizard.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 = (wxWizardPage *)NULL,
 130                        wxWizardPage *next = (wxWizardPage *)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 = (wxWizardPage *)NULL,
 138                 wxWizardPage *next = (wxWizardPage *)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     // a convenience function to make the pages follow each other
 151     static void Chain(wxWizardPageSimple *first, wxWizardPageSimple *second)
 152     {
 153         wxCHECK_RET( first && second,
 154                      wxT("NULL passed to wxWizardPageSimple::Chain") );
 155
 156         first->SetNext(second);
 157         second->SetPrev(first);
 158     }
 159
 160     // base class pure virtuals
 161     virtual wxWizardPage *GetPrev() const;
 162     virtual wxWizardPage *GetNext() const;
 163
 164 private:
 165     // common part of ctors:
 166     void Init()
 167     {
 168         m_prev = m_next = NULL;
 169     }
 170
 171     // pointers are private, the derived classes shouldn't mess with them -
 172     // just derive from wxWizardPage directly to implement different behaviour
 173     wxWizardPage *m_prev,
 174                  *m_next;
 175
 176     DECLARE_DYNAMIC_CLASS_NO_COPY(wxWizardPageSimple)
 177 };
 178
 179 // ----------------------------------------------------------------------------
 180 // wxWizard
 181 // ----------------------------------------------------------------------------
 182
 183 class WXDLLIMPEXP_ADV wxWizardBase : public wxDialog
 184 {
 185 public:
 186     /*
 187        The derived class (i.e. the real wxWizard) has a ctor and Create()
 188        function taking the following arguments:
 189
 190         wxWizard(wxWindow *parent,
 191                  int id = wxID_ANY,
 192                  const wxString& title = wxEmptyString,
 193                  const wxBitmap& bitmap = wxNullBitmap,
 194                  const wxPoint& pos = wxDefaultPosition,
 195                  long style = wxDEFAULT_DIALOG_STYLE);
 196     */
 197     wxWizardBase() { }
 198
 199     // executes the wizard starting from the given page, returns true if it was
 200     // successfully finished, false if user cancelled it
 201     virtual bool RunWizard(wxWizardPage *firstPage) = 0;
 202
 203     // get the current page (NULL if RunWizard() isn't running)
 204     virtual wxWizardPage *GetCurrentPage() const = 0;
 205
 206     // set the min size which should be available for the pages: a
 207     // wizard will take into account the size of the bitmap (if any)
 208     // itself and will never be less than some predefined fixed size
 209     virtual void SetPageSize(const wxSize& size) = 0;
 210
 211     // get the size available for the page
 212     virtual wxSize GetPageSize() const = 0;
 213
 214     // set the best size for the wizard, i.e. make it big enough to contain all
 215     // of the pages starting from the given one
 216     //
 217     // this function may be called several times and possible with different
 218     // pages in which case it will only increase the page size if needed (this
 219     // may be useful if not all pages are accessible from the first one by
 220     // default)
 221     virtual void FitToPage(const wxWizardPage *firstPage) = 0;
 222
 223     // Adding pages to page area sizer enlarges wizard
 224     virtual wxSizer *GetPageAreaSizer() const = 0;
 225
 226     // Set border around page area. Default is 0 if you add at least one
 227     // page to GetPageAreaSizer and 5 if you don't.
 228     virtual void SetBorder(int border) = 0;
 229
 230     // the methods below may be overridden by the derived classes to provide
 231     // custom logic for determining the pages order
 232
 233     virtual bool HasNextPage(wxWizardPage *page)
 234         { return page->GetNext() != NULL; }
 235
 236     virtual bool HasPrevPage(wxWizardPage *page)
 237         { return page->GetPrev() != NULL; }
 238
 239     /// Override these functions to stop InitDialog from calling TransferDataToWindow
 240     /// for _all_ pages when the wizard starts. Instead 'ShowPage' will call
 241     /// TransferDataToWindow for the first page only.
 242     bool TransferDataToWindow() { return true; }
 243     bool TransferDataFromWindow() { return true; }
 244     bool Validate() { return true; }
 245
 246 private:
 247     DECLARE_NO_COPY_CLASS(wxWizardBase)
 248 };
 249
 250 // include the real class declaration
 251 #include "wx/generic/wizard.h"
 252
 253 // ----------------------------------------------------------------------------
 254 // wxWizardEvent class represents an event generated by the wizard: this event
 255 // is first sent to the page itself and, if not processed there, goes up the
 256 // window hierarchy as usual
 257 // ----------------------------------------------------------------------------
 258
 259 class WXDLLIMPEXP_ADV wxWizardEvent : public wxNotifyEvent
 260 {
 261 public:
 262     wxWizardEvent(wxEventType type = wxEVT_NULL,
 263                   int id = wxID_ANY,
 264                   bool direction = true,
 265                   wxWizardPage* page = NULL);
 266
 267     // for EVT_WIZARD_PAGE_CHANGING, return true if we're going forward or
 268     // false otherwise and for EVT_WIZARD_PAGE_CHANGED return true if we came
 269     // from the previous page and false if we returned from the next one
 270     // (this function doesn't make sense for CANCEL events)
 271     bool GetDirection() const { return m_direction; }
 272
 273     wxWizardPage*   GetPage() const { return m_page; }
 274
 275     virtual wxEvent *Clone() const { return new wxWizardEvent(*this); }
 276
 277 private:
 278     bool m_direction;
 279     wxWizardPage*    m_page;
 280
 281     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxWizardEvent)
 282 };
 283
 284 // ----------------------------------------------------------------------------
 285 // macros for handling wxWizardEvents
 286 // ----------------------------------------------------------------------------
 287
 288 extern WXDLLIMPEXP_ADV const wxEventType wxEVT_WIZARD_PAGE_CHANGED;
 289 extern WXDLLIMPEXP_ADV const wxEventType wxEVT_WIZARD_PAGE_CHANGING;
 290 extern WXDLLIMPEXP_ADV const wxEventType wxEVT_WIZARD_CANCEL;
 291 extern WXDLLIMPEXP_ADV const wxEventType wxEVT_WIZARD_HELP;
 292 extern WXDLLIMPEXP_ADV const wxEventType wxEVT_WIZARD_FINISHED;
 293
 294 typedef void (wxEvtHandler::*wxWizardEventFunction)(wxWizardEvent&);
 295
 296 #define wxWizardEventHandler(func) \
 297     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxWizardEventFunction, &func)
 298
 299 #define wx__DECLARE_WIZARDEVT(evt, id, fn) \
 300     wx__DECLARE_EVT1(wxEVT_WIZARD_ ## evt, id, wxWizardEventHandler(fn))
 301
 302 // notifies that the page has just been changed (can't be vetoed)
 303 #define EVT_WIZARD_PAGE_CHANGED(id, fn) wx__DECLARE_WIZARDEVT(PAGE_CHANGED, id, fn)
 304
 305 // the user pressed "<Back" or "Next>" button and the page is going to be
 306 // changed - unless the event handler vetoes the event
 307 #define EVT_WIZARD_PAGE_CHANGING(id, fn) wx__DECLARE_WIZARDEVT(PAGE_CHANGING, id, fn)
 308
 309 // the user pressed "Cancel" button and the wizard is going to be dismissed -
 310 // unless the event handler vetoes the event
 311 #define EVT_WIZARD_CANCEL(id, fn) wx__DECLARE_WIZARDEVT(CANCEL, id, fn)
 312
 313 // the user pressed "Finish" button and the wizard is going to be dismissed -
 314 #define EVT_WIZARD_FINISHED(id, fn) wx__DECLARE_WIZARDEVT(FINISHED, id, fn)
 315
 316 // the user pressed "Help" button
 317 #define EVT_WIZARD_HELP(id, fn) wx__DECLARE_WIZARDEVT(HELP, id, fn)
 318
 319 #endif // wxUSE_WIZARDDLG
 320
 321 #endif // _WX_WIZARD_H_