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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: gtk/timer.cpp | |
3 | // Purpose: wxTimer implementation | |
4 | // Author: Robert Roebling | |
5 | // Id: $Id$ | |
6 | // Copyright: (c) 1998 Robert Roebling | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | ||
11 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) | |
12 | #pragma implementation "timer.h" | |
13 | #endif | |
14 | ||
15 | // For compilers that support precompilation, includes "wx.h". | |
16 | #include "wx/wxprec.h" | |
17 | ||
18 | #if wxUSE_TIMER | |
19 | ||
20 | #include "wx/timer.h" | |
21 | ||
22 | #include "gtk/gtk.h" | |
23 | ||
24 | // ---------------------------------------------------------------------------- | |
25 | // wxTimer | |
26 | // ---------------------------------------------------------------------------- | |
27 | ||
28 | IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject) | |
29 | ||
30 | extern "C" gint timeout_callback( gpointer data ) | |
31 | { | |
32 | wxTimer *timer = (wxTimer*)data; | |
33 | ||
34 | // Don't change the order of anything in this callback! | |
35 | ||
36 | if (timer->IsOneShot()) | |
37 | { | |
38 | // This sets m_tag to -1 | |
39 | timer->Stop(); | |
40 | } | |
41 | ||
42 | // When getting called from GDK's timer handler we | |
43 | // are no longer within GDK's grab on the GUI | |
44 | // thread so we must lock it here ourselves. | |
45 | gdk_threads_enter(); | |
46 | ||
47 | timer->Notify(); | |
48 | ||
49 | // Release lock again. | |
50 | gdk_threads_leave(); | |
51 | ||
52 | if (timer->IsOneShot()) | |
53 | return FALSE; | |
54 | ||
55 | return TRUE; | |
56 | } | |
57 | ||
58 | void wxTimer::Init() | |
59 | { | |
60 | m_tag = -1; | |
61 | m_milli = 1000; | |
62 | } | |
63 | ||
64 | wxTimer::~wxTimer() | |
65 | { | |
66 | wxTimer::Stop(); | |
67 | } | |
68 | ||
69 | bool wxTimer::Start( int millisecs, bool oneShot ) | |
70 | { | |
71 | (void)wxTimerBase::Start(millisecs, oneShot); | |
72 | ||
73 | if (m_tag != -1) | |
74 | gtk_timeout_remove( m_tag ); | |
75 | ||
76 | m_tag = gtk_timeout_add( m_milli, timeout_callback, this ); | |
77 | ||
78 | return TRUE; | |
79 | } | |
80 | ||
81 | void wxTimer::Stop() | |
82 | { | |
83 | if (m_tag != -1) | |
84 | { | |
85 | gtk_timeout_remove( m_tag ); | |
86 | m_tag = -1; | |
87 | } | |
88 | } | |
89 | ||
90 | #endif // wxUSE_TIMER | |
91 |