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