move CairoWidget into gtkmm2ext, add CairoPacker, made the time info box use CairoPacker, make the info status "bar" use CairoPacker

git-svn-id: svn://localhost/ardour2/branches/3.0@10933 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 81 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/gtkmm2ext/cairo_widget.h b/libs/gtkmm2ext/gtkmm2ext/cairo_widget.h
new file mode 100644
index 0000000000..e3ef7bafad
--- /dev/null
+++ b/libs/gtkmm2ext/gtkmm2ext/cairo_widget.h
@@ -0,0 +1,81 @@
+/*
+    Copyright (C) 2009 Paul Davis
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __gtk2_ardour_cairo_widget_h__
+#define __gtk2_ardour_cairo_widget_h__
+
+#include <gtkmm/eventbox.h>
+#include "gtkmm2ext/widget_state.h"
+
+/** A parent class for widgets that are rendered using Cairo.
+ */
+
+class CairoWidget : public Gtk::EventBox
+{
+public:
+	CairoWidget ();
+	virtual ~CairoWidget ();
+
+	void set_dirty ();
+
+	Gtkmm2ext::ActiveState active_state() const { return _active_state; }
+	Gtkmm2ext::VisualState visual_state() const { return _visual_state; }
+	
+	/* derived widgets can override these two to catch 
+	   changes in active & visual state
+	*/
+	
+	virtual void set_active_state (Gtkmm2ext::ActiveState);
+	virtual void set_visual_state (Gtkmm2ext::VisualState);
+
+	void unset_active_state () { set_active_state (Gtkmm2ext::ActiveState (0)); }
+	void unset_visual_state () { set_visual_state (Gtkmm2ext::VisualState (0)); }
+
+	/* this is an API simplification for widgets
+	   that only use the Active and Normal active states.
+	*/
+	void set_active (bool);
+	bool get_active () { return active_state() != Gtkmm2ext::ActiveState (0); }
+
+	/* widgets can be told to only draw their "foreground, and thus leave
+	   in place whatever background is drawn by their parent. the default
+	   is that the widget will fill its event window with the background
+	   color of the parent container.
+	*/
+
+	void set_draw_background (bool yn);
+
+	sigc::signal<void> StateChanged;
+
+	static void provide_background_for_cairo_widget (Gtk::Widget& w, const Gdk::Color& bg);
+
+protected:
+	/** Render the widget to the given Cairo context */
+	virtual void render (cairo_t *) = 0;
+	virtual bool on_expose_event (GdkEventExpose *);
+	void on_size_allocate (Gtk::Allocation &);
+	void on_state_changed (Gtk::StateType);
+	Gdk::Color get_parent_bg ();
+
+	Gtkmm2ext::ActiveState _active_state;
+	Gtkmm2ext::VisualState _visual_state;
+	bool                   _need_bg;
+};
+
+#endif