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diff --git a/cinelerra-5.1/cinelerra/preferencesthread.h b/cinelerra-5.1/cinelerra/preferencesthread.h
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+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ *
+ * This program 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 program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef PREFERENCESTHREAD_H
+#define PREFERENCESTHREAD_H
+
+#include "bcdialog.h"
+#include "edl.inc"
+#include "guicast.h"
+#include "mutex.inc"
+#include "mwindow.inc"
+#include "preferences.inc"
+#include "preferencesthread.inc"
+
+
+class PreferencesMenuitem : public BC_MenuItem
+{
+public:
+	PreferencesMenuitem(MWindow *mwindow);
+	~PreferencesMenuitem();
+
+	int handle_event();
+
+	MWindow *mwindow;
+	PreferencesThread *thread;
+};
+
+class PreferencesThread : public BC_DialogThread
+{
+public:
+	PreferencesThread(MWindow *mwindow);
+	~PreferencesThread();
+
+	BC_Window* new_gui();
+	void handle_close_event(int result);
+// update rendering rates
+	void update_rates();
+// update playback rate
+	int update_framerate();
+	int apply_settings();
+	const char* category_to_text(int category);
+	int text_to_category(const char *category);
+
+	int current_dialog;
+	int thread_running;
+	int redraw_indexes;
+	int redraw_meters;
+	int redraw_times;
+	int redraw_overlays;
+	int rerender;
+	int close_assets;
+	int reload_plugins;
+	PreferencesWindow *window;
+	MWindow *mwindow;
+// Copy of mwindow preferences
+	Preferences *preferences;
+	EDL *edl;
+
+// Categories
+#define CATEGORIES 6
+	enum
+	{
+		PLAYBACK_A,
+		PLAYBACK_B,
+		RECORD,
+		PERFORMANCE,
+		INTERFACE,
+		ABOUT
+	};
+};
+
+class PreferencesDialog : public BC_SubWindow
+{
+public:
+	PreferencesDialog(MWindow *mwindow, PreferencesWindow *pwindow);
+	virtual ~PreferencesDialog();
+
+	virtual void create_objects() {}
+// update playback rate
+	virtual int draw_framerate(int flush) { return 0; }
+// update rendering rates
+	virtual void update_rates() {}
+	virtual int show_window(int flush) { return BC_SubWindow::show_window(flush); }
+
+	PreferencesWindow *pwindow;
+	MWindow *mwindow;
+	Preferences *preferences;
+};
+
+class PreferencesCategory;
+class PreferencesButton;
+
+class PreferencesWindow : public BC_Window
+{
+public:
+	PreferencesWindow(MWindow *mwindow,
+		PreferencesThread *thread,
+		int x,
+		int y);
+	~PreferencesWindow();
+
+	void create_objects();
+	int delete_current_dialog();
+	int set_current_dialog(int number);
+	int update_framerate();
+	void update_rates();
+	void show_dialog() { dialog->show_window(0); }
+	MWindow *mwindow;
+	PreferencesThread *thread;
+	ArrayList<BC_ListBoxItem*> categories;
+	PreferencesCategory *category;
+	PreferencesButton *category_button[CATEGORIES];
+
+private:
+	PreferencesDialog *dialog;
+};
+
+class PreferencesButton : public BC_GenericButton
+{
+public:
+	PreferencesButton(MWindow *mwindow,
+		PreferencesThread *thread,
+		int x,
+		int y,
+		int category,
+		const char *text,
+		VFrame **images);
+
+	int handle_event();
+
+	MWindow *mwindow;
+	PreferencesThread *thread;
+	int category;
+};
+
+class PreferencesCategory : public BC_PopupTextBox
+{
+public:
+	PreferencesCategory(MWindow *mwindow, PreferencesThread *thread, int x, int y);
+	~PreferencesCategory();
+	int handle_event();
+	MWindow *mwindow;
+	PreferencesThread *thread;
+};
+
+class PreferencesApply : public BC_GenericButton
+{
+public:
+	PreferencesApply(MWindow *mwindow, PreferencesThread *thread);
+	int handle_event();
+	MWindow *mwindow;
+	PreferencesThread *thread;
+};
+
+class PreferencesOK : public BC_GenericButton
+{
+public:
+	PreferencesOK(MWindow *mwindow, PreferencesThread *thread);
+	int keypress_event();
+	int handle_event();
+	MWindow *mwindow;
+	PreferencesThread *thread;
+};
+
+class PreferencesCancel : public BC_GenericButton
+{
+public:
+	PreferencesCancel(MWindow *mwindow, PreferencesThread *thread);
+	int keypress_event();
+	int handle_event();
+	MWindow *mwindow;
+	PreferencesThread *thread;
+};
+
+
+#endif