include/wx/timer.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/timer.h
   3 // Purpose:     wxTimer, wxStopWatch and global time-related functions
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin (wxTimerBase)
   6 //              Guillermo Rodriguez (global clean up)
   7 // Created:     04/01/98
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) Julian Smart
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_TIMER_H_BASE_
  14 #define _WX_TIMER_H_BASE_
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_GUI && wxUSE_TIMER
  19
  20 #include "wx/object.h"
  21 #include "wx/longlong.h"
  22 #include "wx/event.h"
  23 #include "wx/stopwatch.h" // for backwards compatibility
  24
  25
  26 // more readable flags for Start():
  27
  28 // generate notifications periodically until the timer is stopped (default)
  29 #define wxTIMER_CONTINUOUS false
  30
  31 // only send the notification once and then stop the timer
  32 #define wxTIMER_ONE_SHOT true
  33
  34 // the interface of wxTimer class
  35 class WXDLLEXPORT wxTimerBase : public wxEvtHandler
  36 {
  37 public:
  38     // ctors and initializers
  39     // ----------------------
  40
  41     // default: if you don't call SetOwner(), your only chance to get timer
  42     // notifications is to override Notify() in the derived class
  43     wxTimerBase()
  44         { Init(); SetOwner(this); }
  45
  46     // ctor which allows to avoid having to override Notify() in the derived
  47     // class: the owner will get timer notifications which can be handled with
  48     // EVT_TIMER
  49     wxTimerBase(wxEvtHandler *owner, int timerid = wxID_ANY)
  50         { Init(); SetOwner(owner, timerid); }
  51
  52     // same as ctor above
  53     void SetOwner(wxEvtHandler *owner, int timerid = wxID_ANY)
  54         { m_owner = owner; m_idTimer = timerid == wxID_ANY ? wxNewId() : timerid; }
  55     wxEvtHandler * GetOwner() const { return m_owner; }
  56
  57     virtual ~wxTimerBase();
  58
  59     // working with the timer
  60     // ----------------------
  61
  62     // start the timer: if milliseconds == -1, use the same value as for the
  63     // last Start()
  64     //
  65     // it is now valid to call Start() multiple times: this just restarts the
  66     // timer if it is already running
  67     virtual bool Start(int milliseconds = -1, bool oneShot = false);
  68
  69     // stop the timer
  70     virtual void Stop() = 0;
  71
  72     // override this in your wxTimer-derived class if you want to process timer
  73     // messages in it, use non default ctor or SetOwner() otherwise
  74     virtual void Notify();
  75
  76     // getting info
  77     // ------------
  78
  79     // return true if the timer is running
  80     virtual bool IsRunning() const = 0;
  81
  82     // return the timer ID
  83     int GetId() const { return m_idTimer; }
  84
  85     // get the (last) timer interval in milliseconds
  86     int GetInterval() const { return m_milli; }
  87
  88     // return true if the timer is one shot
  89     bool IsOneShot() const { return m_oneShot; }
  90
  91 protected:
  92     // common part of all ctors
  93     void Init()
  94         { m_owner = NULL; m_idTimer = wxID_ANY; m_milli = 0; m_oneShot = false; }
  95
  96     wxEvtHandler *m_owner;
  97     int     m_idTimer;
  98     int     m_milli;        // the timer interval
  99     bool    m_oneShot;      // true if one shot
 100
 101     DECLARE_NO_COPY_CLASS(wxTimerBase)
 102 };
 103
 104 // ----------------------------------------------------------------------------
 105 // wxTimer itself
 106 // ----------------------------------------------------------------------------
 107
 108 #if defined(__WXMSW__)
 109     #include "wx/msw/timer.h"
 110 #elif defined(__WXMOTIF__)
 111     #include "wx/motif/timer.h"
 112 #elif defined(__WXGTK20__)
 113     #include "wx/gtk/timer.h"
 114 #elif defined(__WXGTK__)
 115     #include "wx/gtk1/timer.h"
 116 #elif defined(__WXX11__) || defined(__WXMGL__) || defined(__WXDFB__)
 117     #include "wx/generic/timer.h"
 118 #elif defined (__WXCOCOA__)
 119     #include "wx/cocoa/timer.h"
 120 #elif defined(__WXMAC__)
 121     #include "wx/mac/timer.h"
 122 #elif defined(__WXPM__)
 123     #include "wx/os2/timer.h"
 124 #endif
 125
 126 // ----------------------------------------------------------------------------
 127 // wxTimerRunner: starts the timer in its ctor, stops in the dtor
 128 // ----------------------------------------------------------------------------
 129
 130 class WXDLLEXPORT wxTimerRunner
 131 {
 132 public:
 133     wxTimerRunner(wxTimer& timer) : m_timer(timer) { }
 134     wxTimerRunner(wxTimer& timer, int milli, bool oneShot = false)
 135         : m_timer(timer)
 136     {
 137         m_timer.Start(milli, oneShot);
 138     }
 139
 140     void Start(int milli, bool oneShot = false)
 141     {
 142         m_timer.Start(milli, oneShot);
 143     }
 144
 145     ~wxTimerRunner()
 146     {
 147         if ( m_timer.IsRunning() )
 148         {
 149             m_timer.Stop();
 150         }
 151     }
 152
 153 private:
 154     wxTimer& m_timer;
 155
 156     DECLARE_NO_COPY_CLASS(wxTimerRunner)
 157 };
 158
 159 // ----------------------------------------------------------------------------
 160 // wxTimerEvent
 161 // ----------------------------------------------------------------------------
 162
 163 class WXDLLEXPORT wxTimerEvent : public wxEvent
 164 {
 165 public:
 166     wxTimerEvent(int timerid = 0, int interval = 0) : wxEvent(timerid)
 167     {
 168         m_eventType = wxEVT_TIMER;
 169
 170         m_interval = interval;
 171     }
 172
 173     // accessors
 174     int GetInterval() const { return m_interval; }
 175
 176     // implement the base class pure virtual
 177     virtual wxEvent *Clone() const { return new wxTimerEvent(*this); }
 178
 179 private:
 180     int m_interval;
 181
 182     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxTimerEvent)
 183 };
 184
 185 typedef void (wxEvtHandler::*wxTimerEventFunction)(wxTimerEvent&);
 186
 187 #define wxTimerEventHandler(func) \
 188     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxTimerEventFunction, &func)
 189
 190 #define EVT_TIMER(timerid, func) \
 191     wx__DECLARE_EVT1(wxEVT_TIMER, timerid, wxTimerEventHandler(func))
 192
 193 #endif // wxUSE_GUI && wxUSE_TIMER
 194
 195 #endif
 196     // _WX_TIMER_H_BASE_