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win/rfb_win32/SDisplayCorePolling.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.
+ */
+
+// -=- SDisplayCorePolling.h
+//
+// SDisplayCore implementation that simply polls the screen, in sections,
+// in order to detect changes.  This Core will signal the SDisplay's
+// updateEvent regularly, causing it to call the Core back to propagate
+// changes to the VNC Server.
+
+
+#ifndef __RFB_SDISPLAY_CORE_POLLING_H__
+#define __RFB_SDISPLAY_CORE_POLLING_H__
+
+#include <rfb_win32/SDisplay.h>
+#include <rfb_win32/IntervalTimer.h>
+#include <rfb_win32/WMWindowCopyRect.h>
+
+namespace rfb {
+  namespace win32 {
+
+    class SDisplayCorePolling : public SDisplayCore, protected MsgWindow {
+    public:
+      SDisplayCorePolling(SDisplay* display, UpdateTracker* ut, int pollIntervalMs=50);
+      ~SDisplayCorePolling();
+
+      // - Called by SDisplay to inform Core of the screen size
+      virtual void setScreenRect(const Rect& screenRect_);
+
+      // - Called by SDisplay to flush updates to the specified tracker
+      virtual void flushUpdates();
+
+      virtual const char* methodName() const { return "Polling"; }
+
+    protected:
+      // - MsgWindow overrides
+      //   processMessage is used to service the cursor & polling timers
+      virtual LRESULT processMessage(UINT msg, WPARAM wParam, LPARAM lParam);
+
+      // - Hooking subcomponents used to track the desktop state
+      WMCopyRect copyrect;
+
+      // - Background full screen polling fields
+      IntervalTimer pollTimer;
+      static const unsigned int pollTimerId;
+      Rect screenRect;
+      int pollInterval;
+      int pollNextY;
+      int pollIncrementY;
+      bool pollNextStrip;
+
+      // - Handle back to the owning SDisplay, and to the UpdateTracker to flush to
+      SDisplay* display;
+      UpdateTracker* updateTracker;
+    };
+
+  };
+};
+
+#endif