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win/rfb_win32/IntervalTimer.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- IntervalTimer.h
+//
+// Simple wrapper for standard Win32 timers
+
+#ifndef __RFB_WIN32_INTERVAL_TIMER_H__
+#define __RFB_WIN32_INTERVAL_TIMER_H__
+
+namespace rfb {
+
+  namespace win32 {
+
+    struct IntervalTimer {
+      IntervalTimer(HWND hwnd_, int id_)
+        : hwnd(hwnd_), id(id_), active(false) {
+      }
+      IntervalTimer() : hwnd(0), id(0), active(false) {
+      }
+      ~IntervalTimer() {
+        stop();
+      }
+
+      void start(int interval_) {
+        if (!active || interval_ != interval) {
+          interval = interval_;
+          if (!SetTimer(hwnd, id, interval, 0))
+            throw rdr::SystemException("SetTimer", GetLastError());
+          active = true;
+        }
+      }
+      void stop() {
+        if (active)
+          KillTimer(hwnd, id);
+        active = false;
+      }
+
+      void setHWND(HWND hwnd_) {hwnd=hwnd_;}
+      void setId(int id_) {id = id_;}
+      int getId() const {return id;}
+      bool isActive() const {return active;}
+
+    private:
+      HWND hwnd;
+      int id;
+      bool active;
+      int interval;
+    };
+
+  }; // win32
+
+}; // rfb
+
+#endif // __RFB_WIN32_INTERVAL_TIMER_H__