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/*
Copyright (C) 2006 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 __gtkmm2ext_pixfader_h__
#define __gtkmm2ext_pixfader_h__
#include <cmath>
#include <stdint.h>
#include "gtkmm2ext/cairo_widget.h"
#include <gtkmm/adjustment.h>
#include <gdkmm.h>
#include "gtkmm2ext/visibility.h"
namespace Gtkmm2ext {
class LIBGTKMM2EXT_API PixFader : public CairoWidget
{
public:
PixFader (Gtk::Adjustment& adjustment, int orientation, int span, int girth);
virtual ~PixFader ();
static void flush_pattern_cache();
sigc::signal<void> StartGesture;
sigc::signal<void> StopGesture;
sigc::signal<void> OnExpose;
void set_default_value (float);
void set_text (const std::string&, bool centered = true, bool expose = true);
enum Tweaks {
NoShowUnityLine = 0x1,
NoButtonForward = 0x2,
NoVerticalScroll = 0x4,
};
Tweaks tweaks() const { return _tweaks; }
void set_tweaks (Tweaks);
protected:
void on_size_request (GtkRequisition*);
void on_size_allocate (Gtk::Allocation& alloc);
void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
bool on_grab_broken_event (GdkEventGrabBroken*);
bool on_button_press_event (GdkEventButton*);
bool on_button_release_event (GdkEventButton*);
bool on_motion_notify_event (GdkEventMotion*);
bool on_scroll_event (GdkEventScroll* ev);
bool on_enter_notify_event (GdkEventCrossing* ev);
bool on_leave_notify_event (GdkEventCrossing* ev);
void on_state_changed (Gtk::StateType);
void on_style_changed (const Glib::RefPtr<Gtk::Style>&);
enum Orientation {
VERT,
HORIZ,
};
private:
Glib::RefPtr<Pango::Layout> _layout;
std::string _text;
Tweaks _tweaks;
Gtk::Adjustment& _adjustment;
int _text_width;
int _text_height;
int _span, _girth;
int _min_span, _min_girth;
int _orien;
cairo_pattern_t* _pattern;
bool _hovering;
GdkWindow* _grab_window;
double _grab_loc;
double _grab_start;
bool _dragging;
float _default_value;
int _unity_loc;
bool _centered_text;
sigc::connection _parent_style_change;
Widget * _current_parent;
Gdk::Color get_parent_bg ();
void create_patterns();
void adjustment_changed ();
void set_adjustment_from_event (GdkEventButton *);
void update_unity_position ();
int display_span ();
struct FaderImage {
cairo_pattern_t* pattern;
double fr;
double fg;
double fb;
double br;
double bg;
double bb;
int width;
int height;
FaderImage (cairo_pattern_t* p,
double afr, double afg, double afb,
double abr, double abg, double abb,
int w, int h)
: pattern (p)
, fr (afr)
, fg (afg)
, fb (afb)
, br (abr)
, bg (abg)
, bb (abb)
, width (w)
, height (h)
{}
bool matches (double afr, double afg, double afb,
double abr, double abg, double abb,
int w, int h) {
return width == w &&
height == h &&
afr == fr &&
afg == fg &&
afb == fb &&
abr == br &&
abg == bg &&
abb == bb;
}
};
static std::list<FaderImage*> _patterns;
static cairo_pattern_t* find_pattern (double afr, double afg, double afb,
double abr, double abg, double abb,
int w, int h);
};
} /* namespace */
#endif /* __gtkmm2ext_pixfader_h__ */
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