Paul Davis
51ab5ccabf
git-svn-id: svn://localhost/ardour2/branches/3.0@10311 d708f5d6-7413-0410-9779-e7cbd77b26cf
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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Copyright (C) 2009 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __gtk2_ardour_cairo_widget_h__
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#define __gtk2_ardour_cairo_widget_h__
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#include <gtkmm/eventbox.h>
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/** A parent class for widgets that are made up of a pixmap rendered using Cairo.
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* The pixmap is painted to screen on GTK expose events, but the rendering
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* is only done after set_dirty() has been called.
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*/
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class CairoWidget : public Gtk::EventBox
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{
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public:
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CairoWidget ();
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virtual ~CairoWidget ();
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void set_dirty ();
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/* widget states: unlike GTK, these OR-together so that
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a widget can be both Active *and* Selected, rather than
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each one being orthogonal.
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*/
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enum State {
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Active = 0x1,
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Mid = 0x2,
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Selected = 0x4,
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Prelight = 0x8,
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Insensitive = 0x10,
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};
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State state() const { return _state; }
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virtual void set_state (State, bool);
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sigc::signal<void> StateChanged;
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protected:
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/** Render the widget to the given Cairo context */
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virtual void render (cairo_t *) = 0;
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virtual bool on_expose_event (GdkEventExpose *);
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void on_size_allocate (Gtk::Allocation &);
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Gdk::Color get_parent_bg ();
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int _width; ///< pixmap width
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int _height; ///< pixmap height
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State _state;
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private:
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bool _dirty; ///< true if the pixmap requires re-rendering
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GdkPixmap* _pixmap; ///< our pixmap
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};
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#endif
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