include/wx/ctrlsub.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/ctrlsub.h (read: "wxConTRoL with SUBitems")
   3 // Purpose:     wxControlWithItems interface
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     22.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_CTRLSUB_H_BASE_
  13 #define _WX_CTRLSUB_H_BASE_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_CONTROLS
  18
  19 #include "wx/control.h"      // base class
  20
  21 // ----------------------------------------------------------------------------
  22 // wxItemContainer defines an interface which is implemented by all controls
  23 // which have string subitems each of which may be selected.
  24 //
  25 // It is decomposed in wxItemContainerImmutable which omits all methods
  26 // adding/removing items and is used by wxRadioBox and wxItemContainer itself.
  27 //
  28 // Examples: wxListBox, wxCheckListBox, wxChoice and wxComboBox (which
  29 // implements an extended interface deriving from this one)
  30 // ----------------------------------------------------------------------------
  31
  32 class WXDLLEXPORT wxItemContainerImmutable
  33 {
  34 public:
  35     wxItemContainerImmutable() { }
  36     virtual ~wxItemContainerImmutable();
  37
  38     // accessing strings
  39     // -----------------
  40
  41     virtual unsigned int GetCount() const = 0;
  42     bool IsEmpty() const { return GetCount() == 0; }
  43
  44     virtual wxString GetString(unsigned int n) const = 0;
  45     wxArrayString GetStrings() const;
  46     virtual void SetString(unsigned int n, const wxString& s) = 0;
  47
  48     // finding string natively is either case sensitive or insensitive
  49     // but never both so fall back to this base version for not
  50     // supported search type
  51     virtual int FindString(const wxString& s, bool bCase = false) const
  52     {
  53         unsigned int count = GetCount();
  54
  55         for ( unsigned int i = 0; i < count ; ++i )
  56         {
  57             if (GetString(i).IsSameAs( s , bCase ))
  58                 return (int)i;
  59         }
  60
  61         return wxNOT_FOUND;
  62     }
  63
  64
  65     // selection
  66     // ---------
  67
  68     virtual void SetSelection(int n) = 0;
  69     virtual int GetSelection() const = 0;
  70
  71     // set selection to the specified string, return false if not found
  72     bool SetStringSelection(const wxString& s);
  73
  74     // return the selected string or empty string if none
  75     wxString GetStringSelection() const;
  76
  77     // this is the same as SetSelection( for single-selection controls but
  78     // reads better for multi-selection ones
  79     void Select(int n) { SetSelection(n); }
  80
  81
  82 protected:
  83
  84     // check that the index is valid
  85     inline bool IsValid(unsigned int n) const { return n < GetCount(); }
  86     inline bool IsValidInsert(unsigned int n) const { return n <= GetCount(); }
  87 };
  88
  89 class WXDLLEXPORT wxItemContainer : public wxItemContainerImmutable
  90 {
  91 public:
  92     wxItemContainer() { m_clientDataItemsType = wxClientData_None; }
  93     virtual ~wxItemContainer();
  94
  95     // adding items
  96     // ------------
  97
  98     int Append(const wxString& item)
  99         { return DoAppend(item); }
 100     int Append(const wxString& item, void *clientData)
 101         { int n = DoAppend(item); SetClientData(n, clientData); return n; }
 102     int Append(const wxString& item, wxClientData *clientData)
 103         { int n = DoAppend(item); SetClientObject(n, clientData); return n; }
 104
 105     // only for rtti needs (separate name)
 106     void AppendString( const wxString& item)
 107         { Append( item ); }
 108
 109     // append several items at once to the control
 110     void Append(const wxArrayString& strings);
 111
 112     int Insert(const wxString& item, unsigned int pos)
 113         { return DoInsert(item, pos); }
 114     int Insert(const wxString& item, unsigned int pos, void *clientData);
 115     int Insert(const wxString& item, unsigned int pos, wxClientData *clientData);
 116
 117     // deleting items
 118     // --------------
 119
 120     virtual void Clear() = 0;
 121     virtual void Delete(unsigned int n) = 0;
 122
 123     // misc
 124     // ----
 125
 126     // client data stuff
 127     void SetClientData(unsigned int n, void* clientData);
 128     void* GetClientData(unsigned int n) const;
 129
 130     void SetClientObject(unsigned int n, wxClientData* clientData);
 131     wxClientData* GetClientObject(unsigned int n) const;
 132
 133     bool HasClientObjectData() const
 134         { return m_clientDataItemsType == wxClientData_Object; }
 135     bool HasClientUntypedData() const
 136         { return m_clientDataItemsType == wxClientData_Void; }
 137
 138 protected:
 139     virtual int DoAppend(const wxString& item) = 0;
 140     virtual int DoInsert(const wxString& item, unsigned int pos) = 0;
 141
 142     virtual void DoSetItemClientData(unsigned int n, void* clientData) = 0;
 143     virtual void* DoGetItemClientData(unsigned int n) const = 0;
 144     virtual void DoSetItemClientObject(unsigned int n, wxClientData* clientData) = 0;
 145     virtual wxClientData* DoGetItemClientObject(unsigned int n) const = 0;
 146
 147
 148     // the type of the client data for the items
 149     wxClientDataType m_clientDataItemsType;
 150 };
 151
 152 // this macro must (unfortunately) be used in any class deriving from both
 153 // wxItemContainer and wxControl because otherwise there is ambiguity when
 154 // calling GetClientXXX() functions -- the compiler can't choose between the
 155 // two versions
 156 #define wxCONTROL_ITEMCONTAINER_CLIENTDATAOBJECT_RECAST                    \
 157     void SetClientData(void *data)                                         \
 158         { wxEvtHandler::SetClientData(data); }                             \
 159     void *GetClientData() const                                            \
 160         { return wxEvtHandler::GetClientData(); }                          \
 161     void SetClientObject(wxClientData *data)                               \
 162         { wxEvtHandler::SetClientObject(data); }                           \
 163     wxClientData *GetClientObject() const                                  \
 164         { return wxEvtHandler::GetClientObject(); }                        \
 165     void SetClientData(unsigned int n, void* clientData)                   \
 166         { wxItemContainer::SetClientData(n, clientData); }                 \
 167     void* GetClientData(unsigned int n) const                              \
 168         { return wxItemContainer::GetClientData(n); }                      \
 169     void SetClientObject(unsigned int n, wxClientData* clientData)         \
 170         { wxItemContainer::SetClientObject(n, clientData); }               \
 171     wxClientData* GetClientObject(unsigned int n) const                    \
 172         { return wxItemContainer::GetClientObject(n); }
 173
 174 class WXDLLEXPORT wxControlWithItems : public wxControl, public wxItemContainer
 175 {
 176 public:
 177     wxControlWithItems() { }
 178     virtual ~wxControlWithItems();
 179
 180     // we have to redefine these functions here to avoid ambiguities in classes
 181     // deriving from us which would arise otherwise because both base classses
 182     // have the methods with the same names - hopefully, a smart compiler can
 183     // optimize away these simple inline wrappers so we don't suffer much from
 184     // this
 185     wxCONTROL_ITEMCONTAINER_CLIENTDATAOBJECT_RECAST
 186
 187     // usually the controls like list/combo boxes have their own background
 188     // colour
 189     virtual bool ShouldInheritColours() const { return false; }
 190
 191 protected:
 192     // we can't compute our best size before the items are added to the control
 193     // which is done after calling SetInitialBestSize() (it is called from the
 194     // base class ctor and the items are added in the derived class ctor), so
 195     // don't do anything at all here as our size will be changed later anyhow
 196     //
 197     // of course, all derived classes *must* call SetBestSize() from their
 198     // ctors for this to work!
 199     virtual void SetInitialBestSize(const wxSize& WXUNUSED(size)) { }
 200
 201     // fill in the client object or data field of the event as appropriate
 202     //
 203     // calls InitCommandEvent() and, if n != wxNOT_FOUND, also sets the per
 204     // item client data
 205     void InitCommandEventWithItems(wxCommandEvent& event, int n);
 206
 207 private:
 208     DECLARE_ABSTRACT_CLASS(wxControlWithItems)
 209     DECLARE_NO_COPY_CLASS(wxControlWithItems)
 210 };
 211
 212
 213 // ----------------------------------------------------------------------------
 214 // inline functions
 215 // ----------------------------------------------------------------------------
 216
 217 #endif // wxUSE_CONTROLS
 218
 219 #endif // _WX_CTRLSUB_H_BASE_