include/wx/univ/menu.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/univ/menu.h
   3 // Purpose:     wxMenu and wxMenuBar classes for wxUniversal
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05.05.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_UNIV_MENU_H_
  13 #define _WX_UNIV_MENU_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "univmenu.h"
  17 #endif
  18
  19 #if wxUSE_ACCEL
  20     #include "wx/accel.h"
  21 #endif // wxUSE_ACCEL
  22
  23 #include "wx/dynarray.h"
  24
  25 // fwd declarations
  26 class WXDLLEXPORT wxMenuInfo;
  27 WX_DECLARE_EXPORTED_OBJARRAY(wxMenuInfo, wxMenuInfoArray);
  28
  29 class WXDLLEXPORT wxMenuGeometryInfo;
  30 class WXDLLEXPORT wxPopupMenuWindow;
  31 class WXDLLEXPORT wxRenderer;
  32
  33 // ----------------------------------------------------------------------------
  34 // wxMenu
  35 // ----------------------------------------------------------------------------
  36
  37 class WXDLLEXPORT wxMenu : public wxMenuBase
  38 {
  39 public:
  40     // ctors and dtor
  41     wxMenu(const wxString& title, long style = 0)
  42         : wxMenuBase(title, style) { Init(); }
  43
  44     wxMenu(long style = 0) : wxMenuBase(style) { Init(); }
  45
  46     virtual ~wxMenu();
  47
  48     // called by wxMenuItem when an item of this menu changes
  49     void RefreshItem(wxMenuItem *item);
  50
  51     // does the menu have any items?
  52     bool IsEmpty() const { return !GetMenuItems().GetFirst(); }
  53
  54     // show this menu at the given position (in screen coords) and optionally
  55     // select its first item
  56     void Popup(const wxPoint& pos, const wxSize& size,
  57                bool selectFirst = TRUE);
  58
  59     // dismiss the menu
  60     void Dismiss();
  61
  62     // override the base class methods to connect/disconnect event handlers
  63     virtual void Attach(wxMenuBarBase *menubar);
  64     virtual void Detach();
  65
  66     // implementation only from here
  67
  68     // do as if this item were clicked, return TRUE if the resulting event was
  69     // processed, FALSE otherwise
  70     bool ClickItem(wxMenuItem *item);
  71
  72     // process the key event, return TRUE if done
  73     bool ProcessKeyDown(int key);
  74
  75 #if wxUSE_ACCEL
  76     // find the item for the given accel and generate an event if found
  77     bool ProcessAccelEvent(const wxKeyEvent& event);
  78 #endif // wxUSE_ACCEL
  79
  80 protected:
  81     // implement base class virtuals
  82     virtual bool DoAppend(wxMenuItem *item);
  83     virtual bool DoInsert(size_t pos, wxMenuItem *item);
  84     virtual wxMenuItem *DoRemove(wxMenuItem *item);
  85
  86     // common part of DoAppend and DoInsert
  87     void OnItemAdded(wxMenuItem *item);
  88
  89     // called by wxPopupMenuWindow when the window is hidden
  90     void OnDismiss(bool dismissParent);
  91
  92     // return true if the menu is currently shown on screen
  93     bool IsShown() const;
  94
  95     // get the menu geometry info
  96     const wxMenuGeometryInfo& GetGeometryInfo() const;
  97
  98     // forget old menu geometry info
  99     void InvalidateGeometryInfo();
 100
 101     // return either the menubar or the invoking window, normally never NULL
 102     wxWindow *GetRootWindow() const;
 103
 104     // get the renderer we use for drawing: either the one of the menu bar or
 105     // the one of the window if we're a popup menu
 106     wxRenderer *GetRenderer() const;
 107
 108 #if wxUSE_ACCEL
 109     // add/remove accel for the given menu item
 110     void AddAccelFor(wxMenuItem *item);
 111     void RemoveAccelFor(wxMenuItem *item);
 112 #endif // wxUSE_ACCEL
 113
 114 private:
 115     // common part of all ctors
 116     void Init();
 117
 118     // terminate the current radio group, if any
 119     void EndRadioGroup();
 120
 121     // the exact menu geometry is defined by a struct derived from this one
 122     // which is opaque and defined by the renderer
 123     wxMenuGeometryInfo *m_geometry;
 124
 125     // the menu shown on screen or NULL if not currently shown
 126     wxPopupMenuWindow *m_popupMenu;
 127
 128 #if wxUSE_ACCEL
 129     // the accel table for this menu
 130     wxAcceleratorTable m_accelTable;
 131 #endif // wxUSE_ACCEL
 132
 133     // the position of the first item in the current radio group or -1
 134     int m_startRadioGroup;
 135
 136     // it calls out OnDismiss()
 137     friend class wxPopupMenuWindow;
 138     DECLARE_DYNAMIC_CLASS(wxMenu)
 139 };
 140
 141 // ----------------------------------------------------------------------------
 142 // wxMenuBar
 143 // ----------------------------------------------------------------------------
 144
 145 class WXDLLEXPORT wxMenuBar : public wxMenuBarBase
 146 {
 147 public:
 148     // ctors and dtor
 149     wxMenuBar(long WXUNUSED(style) = 0) { Init(); }
 150     virtual ~wxMenuBar();
 151
 152     // implement base class virtuals
 153     virtual bool Append( wxMenu *menu, const wxString &title );
 154     virtual bool Insert(size_t pos, wxMenu *menu, const wxString& title);
 155     virtual wxMenu *Replace(size_t pos, wxMenu *menu, const wxString& title);
 156     virtual wxMenu *Remove(size_t pos);
 157
 158     virtual void EnableTop(size_t pos, bool enable);
 159     virtual bool IsEnabledTop(size_t pos) const;
 160
 161     virtual void SetLabelTop(size_t pos, const wxString& label);
 162     virtual wxString GetLabelTop(size_t pos) const;
 163
 164     virtual void Attach(wxFrame *frame);
 165     virtual void Detach();
 166
 167     // get the next item for the givan accel letter (used by wxFrame), return
 168     // -1 if none
 169     //
 170     // if unique is not NULL, filled with TRUE if there is only one item with
 171     // this accel, FALSE if two or more
 172     int FindNextItemForAccel(int idxStart,
 173                              int keycode,
 174                              bool *unique = NULL) const;
 175
 176     // called by wxFrame to set focus to or open the given menu
 177     void SelectMenu(size_t pos);
 178     void PopupMenu(size_t pos);
 179
 180 #if wxUSE_ACCEL
 181     // find the item for the given accel and generate an event if found
 182     bool ProcessAccelEvent(const wxKeyEvent& event);
 183 #endif // wxUSE_ACCEL
 184
 185     // called by wxMenu when it is dismissed
 186     void OnDismissMenu(bool dismissMenuBar = FALSE);
 187
 188 protected:
 189     // common part of all ctors
 190     void Init();
 191
 192     // event handlers
 193     void OnLeftDown(wxMouseEvent& event);
 194     void OnMouseMove(wxMouseEvent& event);
 195     void OnKeyDown(wxKeyEvent& event);
 196     void OnKillFocus(wxFocusEvent& event);
 197
 198     // process the mouse move event, return TRUE if we did, FALSE to continue
 199     // processing as usual
 200     //
 201     // the coordinates are client coordinates of menubar, convert if necessary
 202     bool ProcessMouseEvent(const wxPoint& pt);
 203
 204     // called when the menu bar loses mouse capture - it is not hidden unlike
 205     // menus, but it doesn't have modal status any longer
 206     void OnDismiss();
 207
 208     // draw the menubar
 209     virtual void DoDraw(wxControlRenderer *renderer);
 210
 211     // menubar geometry
 212     virtual wxSize DoGetBestClientSize() const;
 213
 214     // has the menubar been created already?
 215     bool IsCreated() const { return m_frameLast != NULL; }
 216
 217     // "fast" version of GetMenuCount()
 218     size_t GetCount() const { return m_menuInfos.GetCount(); }
 219
 220     // get the (total) width of the specified menu
 221     wxCoord GetItemWidth(size_t pos) const;
 222
 223     // get the rect of the item
 224     wxRect GetItemRect(size_t pos) const;
 225
 226     // get the menu from the given point or -1 if none
 227     int GetMenuFromPoint(const wxPoint& pos) const;
 228
 229     // refresh the given item
 230     void RefreshItem(size_t pos);
 231
 232     // refresh all items after this one (including it)
 233     void RefreshAllItemsAfter(size_t pos);
 234
 235     // hide the currently shown menu and show this one
 236     void DoSelectMenu(size_t pos);
 237
 238     // popup the currently selected menu
 239     void PopupCurrentMenu(bool selectFirst = TRUE);
 240
 241     // hide the currently selected menu
 242     void DismissMenu();
 243
 244     // do we show a menu currently?
 245     bool IsShowingMenu() const { return m_menuShown != 0; }
 246
 247     // we don't want to have focus except while selecting from menu
 248     void GiveAwayFocus();
 249
 250     // the array containing extra menu info we need
 251     wxMenuInfoArray m_menuInfos;
 252
 253     // the current item (only used when menubar has focus)
 254     int m_current;
 255
 256 private:
 257     // the last frame to which we were attached, NULL initially
 258     wxFrame *m_frameLast;
 259
 260     // the currently shown menu or NULL
 261     wxMenu *m_menuShown;
 262
 263     // should be showing the menu? this is subtly different from m_menuShown !=
 264     // NULL as the menu which should be shown may be disabled in which case we
 265     // don't show it - but will do as soon as the focus shifts to another menu
 266     bool m_shouldShowMenu;
 267
 268     // it calls out ProcessMouseEvent()
 269     friend class wxPopupMenuWindow;
 270
 271     DECLARE_EVENT_TABLE()
 272     DECLARE_DYNAMIC_CLASS(wxMenuBar)
 273 };
 274
 275 #endif // _WX_UNIV_MENU_H_