remove debugging output

[ardour.git] / gtk2_ardour / cairo_widget.h

diff --git a/gtk2_ardour/cairo_widget.h b/gtk2_ardour/cairo_widget.h
index 99f0d5d8c3302e6f1f392660d37124ac5488b6f1..e3ef7bafad9a930bf75246f67f1d578d2d393c7d 100644 (file)
--- a/gtk2_ardour/cairo_widget.h
+++ b/gtk2_ardour/cairo_widget.h
@@ -1,7 +1,30 @@
+/*
+    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
 {
@@ -11,17 +34,48 @@ public:
 
        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 ();
 
-       int _width; ///< pixmap width
-       int _height; ///< pixmap height
-       
-private:
-       bool _dirty;
-       GdkPixmap* _pixmap;
+       Gtkmm2ext::ActiveState _active_state;
+       Gtkmm2ext::VisualState _visual_state;
+       bool                   _need_bg;
 };
 
 #endif