include/wx/ownerdrw.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        ownerdrw.h
   3 // Purpose:     interface for owner-drawn GUI elements
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     11.11.97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _OWNERDRW_H
  13 #define   _OWNERDRW_H
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_OWNER_DRAWN
  18
  19 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  20     #pragma interface "ownerdrw.h"
  21 #endif
  22
  23 #include "wx/bitmap.h"
  24 #include "wx/colour.h"
  25 #include "wx/font.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // wxOwnerDrawn - a mix-in base class, derive from it to implement owner-drawn
  29 //                behaviour
  30 //
  31 // wxOwnerDrawn supports drawing of an item with non standard font, color and
  32 // also supports 3 bitmaps: either a checked/unchecked bitmap for a checkable
  33 // element or one unchangeable bitmap otherwise.
  34 // ----------------------------------------------------------------------------
  35
  36 class WXDLLEXPORT wxOwnerDrawn
  37 {
  38 public:
  39   // ctor & dtor
  40   wxOwnerDrawn(const wxString& str = wxEmptyString,
  41                bool bCheckable = false,
  42                bool bMenuItem = false); // FIXME kludge for colors
  43   virtual ~wxOwnerDrawn();
  44
  45   // fix appearance
  46   void SetFont(const wxFont& font)
  47       { m_font = font; m_bOwnerDrawn = true; }
  48
  49   wxFont& GetFont() const { return (wxFont &)m_font; }
  50
  51   void SetTextColour(const wxColour& colText)
  52       { m_colText = colText; m_bOwnerDrawn = true; }
  53
  54   wxColour& GetTextColour() const { return (wxColour&) m_colText; }
  55
  56   void SetBackgroundColour(const wxColour& colBack)
  57       { m_colBack = colBack; m_bOwnerDrawn = true; }
  58
  59   wxColour& GetBackgroundColour() const
  60       { return (wxColour&) m_colBack ; }
  61
  62   void SetBitmaps(const wxBitmap& bmpChecked,
  63                   const wxBitmap& bmpUnchecked = wxNullBitmap)
  64       { m_bmpChecked = bmpChecked;
  65         m_bmpUnchecked = bmpUnchecked;
  66         m_bOwnerDrawn = true; }
  67
  68   void SetBitmap(const wxBitmap& bmpChecked)
  69       { m_bmpChecked = bmpChecked;
  70         m_bOwnerDrawn = true; }
  71
  72   void SetDisabledBitmap( const wxBitmap& bmpDisabled )
  73       { m_bmpDisabled = bmpDisabled;
  74         m_bOwnerDrawn = true; }
  75
  76   const wxBitmap& GetBitmap(bool bChecked = true) const
  77       { return (bChecked ? m_bmpChecked : m_bmpUnchecked); }
  78
  79   const wxBitmap& GetDisabledBitmap() const
  80       { return m_bmpDisabled; }
  81
  82   // the height of the menu checkmark (or bitmap) is determined by the font
  83   // for the current item, but the width should be always the same (for the
  84   // items to be aligned), so by default it's taken to be the same as for
  85   // the last item (and default width for the first one).
  86   //
  87   // NB: default is too small for bitmaps, but ok for checkmarks.
  88   void SetMarginWidth(int nWidth)
  89   {
  90       ms_nLastMarginWidth = m_nMarginWidth = (size_t) nWidth;
  91       if ( ((size_t) nWidth) != ms_nDefaultMarginWidth )
  92           m_bOwnerDrawn = true;
  93   }
  94
  95   int GetMarginWidth() const { return (int) m_nMarginWidth; }
  96   static int GetDefaultMarginWidth() { return (int) ms_nDefaultMarginWidth; }
  97
  98   // accessors
  99   void SetName(const wxString& strName)  { m_strName = strName; }
 100   const wxString& GetName() const { return m_strName;    }
 101   void SetCheckable(bool checkable) { m_bCheckable = checkable; }
 102   bool IsCheckable() const { return m_bCheckable; }
 103
 104   // this is for menu items only: accel string is drawn right aligned after the
 105   // menu item if not empty
 106   void SetAccelString(const wxString& strAccel) { m_strAccel = strAccel; }
 107
 108   // this function might seem strange, but if it returns false it means that
 109   // no non-standard attribute are set, so there is no need for this control
 110   // to be owner-drawn. Moreover, you can force owner-drawn to false if you
 111   // want to change, say, the color for the item but only if it is owner-drawn
 112   // (see wxMenuItem::wxMenuItem for example)
 113   bool IsOwnerDrawn() const { return m_bOwnerDrawn;   }
 114
 115   // switch on/off owner-drawing the item
 116   void SetOwnerDrawn(bool ownerDrawn = true) { m_bOwnerDrawn = ownerDrawn; }
 117   void ResetOwnerDrawn() { m_bOwnerDrawn = false;  }
 118
 119 public:
 120   // constants used in OnDrawItem
 121   // (they have the same values as corresponding Win32 constants)
 122   enum wxODAction
 123   {
 124     wxODDrawAll       = 0x0001,   // redraw entire control
 125     wxODSelectChanged = 0x0002,   // selection changed (see Status.Select)
 126     wxODFocusChanged  = 0x0004    // keyboard focus changed (see Status.Focus)
 127   };
 128
 129   enum wxODStatus
 130   {
 131     wxODSelected  = 0x0001,         // control is currently selected
 132     wxODGrayed    = 0x0002,         // item is to be grayed
 133     wxODDisabled  = 0x0004,         // item is to be drawn as disabled
 134     wxODChecked   = 0x0008,         // item is to be checked
 135     wxODHasFocus  = 0x0010,         // item has the keyboard focus
 136     wxODDefault   = 0x0020,         // item is the default item
 137     wxODHidePrefix= 0x0100          // hide keyboard cues (w2k and xp only)
 138   };
 139
 140   // virtual functions to implement drawing (return true if processed)
 141   virtual bool OnMeasureItem(size_t *pwidth, size_t *pheight);
 142   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
 143
 144 protected:
 145   // return true if this is a menu item
 146   bool IsMenuItem() const;
 147
 148   // get the font to use, whether m_font is set or not
 149   wxFont GetFontToUse() const;
 150
 151
 152   wxString  m_strName,      // label for a manu item
 153             m_strAccel;     // the accel string ("Ctrl-F17") if any
 154
 155 private:
 156   static size_t ms_nDefaultMarginWidth; // menu check mark width
 157   static size_t ms_nLastMarginWidth;    // handy for aligning all items
 158
 159   bool      m_bCheckable,   // used only for menu or check listbox items
 160             m_bOwnerDrawn;  // true if something is non standard
 161
 162   wxFont    m_font;         // font to use for drawing
 163   wxColour  m_colText,      // color ----"---"---"----
 164             m_colBack;      // background color
 165   wxBitmap  m_bmpChecked,   // bitmap to put near the item
 166             m_bmpUnchecked, // (checked is used also for 'uncheckable' items)
 167             m_bmpDisabled;
 168
 169   size_t    m_nHeight,      // font height
 170             m_nMinHeight,   // minimum height, as determined by user's system settings
 171             m_nMarginWidth; // space occupied by bitmap to the left of the item
 172 };
 173
 174 #endif // wxUSE_OWNER_DRAWN
 175
 176 #endif
 177   // _OWNERDRW_H