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_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 #include "wx/utils.h"
  25
  26
  27 // more readable flags for Start():
  28
  29 // generate notifications periodically until the timer is stopped (default)
  30 #define wxTIMER_CONTINUOUS false
  31
  32 // only send the notification once and then stop the timer
  33 #define wxTIMER_ONE_SHOT true
  34
  35 class WXDLLIMPEXP_FWD_BASE wxTimerImpl;
  36 class WXDLLIMPEXP_FWD_BASE wxTimerEvent;
  37
  38 // timer event type
  39 wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_BASE, wxEVT_TIMER, wxTimerEvent)
  40
  41 // the interface of wxTimer class
  42 class WXDLLIMPEXP_BASE wxTimer : public wxEvtHandler
  43 {
  44 public:
  45     // ctors and initializers
  46     // ----------------------
  47
  48     // default: if you don't call SetOwner(), your only chance to get timer
  49     // notifications is to override Notify() in the derived class
  50     wxTimer()
  51     {
  52         Init();
  53         SetOwner(this);
  54     }
  55
  56     // ctor which allows to avoid having to override Notify() in the derived
  57     // class: the owner will get timer notifications which can be handled with
  58     // EVT_TIMER
  59     wxTimer(wxEvtHandler *owner, int timerid = wxID_ANY)
  60     {
  61         Init();
  62         SetOwner(owner, timerid);
  63     }
  64
  65     // same as ctor above
  66     void SetOwner(wxEvtHandler *owner, int timerid = wxID_ANY);
  67
  68     virtual ~wxTimer();
  69
  70
  71     // working with the timer
  72     // ----------------------
  73
  74     // NB: Start() and Stop() are not supposed to be overridden, they are only
  75     //     virtual for historical reasons, only Notify() can be overridden
  76
  77     // start the timer: if milliseconds == -1, use the same value as for the
  78     // last Start()
  79     //
  80     // it is now valid to call Start() multiple times: this just restarts the
  81     // timer if it is already running
  82     virtual bool Start(int milliseconds = -1, bool oneShot = false);
  83
  84     // stop the timer, does nothing if the timer is not running
  85     virtual void Stop();
  86
  87     // override this in your wxTimer-derived class if you want to process timer
  88     // messages in it, use non default ctor or SetOwner() otherwise
  89     virtual void Notify();
  90
  91
  92     // accessors
  93     // ---------
  94
  95     // get the object notified about the timer events
  96     wxEvtHandler *GetOwner() const;
  97
  98     // return true if the timer is running
  99     bool IsRunning() const;
 100
 101     // return the timer ID
 102     int GetId() const;
 103
 104     // get the (last) timer interval in milliseconds
 105     int GetInterval() const;
 106
 107     // return true if the timer is one shot
 108     bool IsOneShot() const;
 109
 110 protected:
 111     // common part of all ctors
 112     void Init();
 113
 114     wxTimerImpl *m_impl;
 115
 116     DECLARE_NO_COPY_CLASS(wxTimer)
 117 };
 118
 119 // ----------------------------------------------------------------------------
 120 // wxTimerRunner: starts the timer in its ctor, stops in the dtor
 121 // ----------------------------------------------------------------------------
 122
 123 class WXDLLIMPEXP_BASE wxTimerRunner
 124 {
 125 public:
 126     wxTimerRunner(wxTimer& timer) : m_timer(timer) { }
 127     wxTimerRunner(wxTimer& timer, int milli, bool oneShot = false)
 128         : m_timer(timer)
 129     {
 130         m_timer.Start(milli, oneShot);
 131     }
 132
 133     void Start(int milli, bool oneShot = false)
 134     {
 135         m_timer.Start(milli, oneShot);
 136     }
 137
 138     ~wxTimerRunner()
 139     {
 140         if ( m_timer.IsRunning() )
 141         {
 142             m_timer.Stop();
 143         }
 144     }
 145
 146 private:
 147     wxTimer& m_timer;
 148
 149     DECLARE_NO_COPY_CLASS(wxTimerRunner)
 150 };
 151
 152 // ----------------------------------------------------------------------------
 153 // wxTimerEvent
 154 // ----------------------------------------------------------------------------
 155
 156 class WXDLLIMPEXP_BASE wxTimerEvent : public wxEvent
 157 {
 158 public:
 159     wxTimerEvent()
 160         : wxEvent(wxID_ANY, wxEVT_TIMER) { m_timer=NULL; }
 161
 162     wxTimerEvent(wxTimer& timer)
 163         : wxEvent(timer.GetId(), wxEVT_TIMER),
 164           m_timer(&timer)
 165     {
 166         SetEventObject(timer.GetOwner());
 167     }
 168
 169     // accessors
 170     int GetInterval() const { return m_timer->GetInterval(); }
 171     wxTimer& GetTimer() const { return *m_timer; }
 172
 173     // implement the base class pure virtual
 174     virtual wxEvent *Clone() const { return new wxTimerEvent(*this); }
 175     virtual wxEventCategory GetEventCategory() const { return wxEVT_CATEGORY_TIMER; }
 176
 177 private:
 178     wxTimer* m_timer;
 179
 180     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxTimerEvent)
 181 };
 182
 183 typedef void (wxEvtHandler::*wxTimerEventFunction)(wxTimerEvent&);
 184
 185 #define wxTimerEventHandler(func) \
 186     wxEVENT_HANDLER_CAST(wxTimerEventFunction, func)
 187
 188 #define EVT_TIMER(timerid, func) \
 189     wx__DECLARE_EVT1(wxEVT_TIMER, timerid, wxTimerEventHandler(func))
 190
 191 #endif // wxUSE_TIMER
 192
 193 #endif // _WX_TIMER_H_BASE_