headers/private/interface/MenuWindow.h

   1 /*
   2  * Copyright 2001-2009, Haiku, Inc.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Marc Flerackers (mflerackers@androme.be)
   7  *              Stefano Ceccherini (burton666@libero.it)
   8  */
   9 #ifndef MENU_WINDOW_H
  10 #define MENU_WINDOW_H
  11
  12
  13 #include <Window.h>
  14
  15 class BMenu;
  16
  17
  18 namespace BPrivate {
  19
  20 class BMenuFrame;
  21 class BMenuScroller;
  22
  23
  24 class BMenuWindow : public BWindow {
  25 public:
  26                                                         BMenuWindow(const char* name);
  27         virtual                                 ~BMenuWindow();
  28
  29         virtual void                    DispatchMessage(BMessage* message,
  30                                                                 BHandler* handler);
  31
  32                         void                    AttachMenu(BMenu* menu);
  33                         void                    DetachMenu();
  34
  35                         void                    AttachScrollers();
  36                         void                    DetachScrollers();
  37
  38                         void                    SetSmallStep(float step);
  39                         void                    GetSteps(float* _smallStep, float* _largeStep) const;
  40                         bool                    HasScrollers() const;
  41                         bool                    CheckForScrolling(const BPoint& cursor);
  42                         bool                    TryScrollBy(const float& step);
  43                         bool                    TryScrollTo(const float& where);
  44
  45 private:
  46                         bool                    _Scroll(const BPoint& cursor);
  47                         void                    _ScrollBy(const float& step);
  48
  49                         BMenu*                  fMenu;
  50                         BMenuFrame*             fMenuFrame;
  51                         BMenuScroller*  fUpperScroller;
  52                         BMenuScroller*  fLowerScroller;
  53
  54                         float                   fScrollStep;
  55                         float                   fValue;
  56                         float                   fLimit;
  57 };
  58
  59 }       // namespace BPrivate
  60
  61 #endif  // MENU_WINDOW_H