Make EQ Gui optional and seize updating the graph when the analysis is not visible (either via the toggle or window visibility).

git-svn-id: svn://localhost/ardour2/branches/3.0@3973 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 134 insertions, 0 deletions

diff --git a/gtk2_ardour/plugin_eq_gui.h b/gtk2_ardour/plugin_eq_gui.h
new file mode 100644
index 0000000000..e8fca786f0
--- /dev/null
+++ b/gtk2_ardour/plugin_eq_gui.h
@@ -0,0 +1,134 @@
+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sampo Savolainen
+
+    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 __ardour_plugin_eq_gui_h
+#define __ardour_plugin_eq_gui_h
+
+#include <ardour/buffer_set.h>
+#include <ardour/plugin_insert.h>
+#include <ardour/plugin.h>
+
+#include <gtkmm/table.h>
+#include <gtkmm/drawingarea.h>
+#include <gtkmm/combobox.h>
+#include <gtkmm/liststore.h>
+
+class FFT;
+
+class PluginEqGui : public Gtk::Table
+{
+	public:
+		PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert>);
+		~PluginEqGui();
+		
+	
+
+	private:
+		// Setup
+		void set_buffer_size(uint32_t);
+		void change_dB_scale();
+
+		// Analysis
+		void run_analysis();
+
+		// Drawing
+		virtual void on_hide();
+		virtual void on_show();
+
+		void stop_updating();
+		void start_updating();
+
+		void resize_analysis_area(Gtk::Allocation&);
+		void redraw_analysis_area();
+
+		void draw_analysis_scales(cairo_t *);
+		bool expose_analysis_area(GdkEventExpose *);
+
+		void draw_scales_power(Gtk::Widget *, cairo_t *);
+		void plot_amplitude(Gtk::Widget *,cairo_t *);
+
+		void draw_scales_phase(Gtk::Widget *,cairo_t *);
+		void plot_phase(Gtk::Widget *,cairo_t *);
+
+		// Helpers
+		bool timeout_callback();
+		void redraw_scales();
+
+
+		// Fields:
+
+		// analysis parameters
+		float _samplerate;
+
+		float _min_dB;
+		float _max_dB;
+		float _step_dB;
+
+
+		float _log_coeff;
+		float _log_max;
+
+		nframes_t _buffer_size;
+
+		// buffers		
+		ARDOUR::BufferSet _bufferset;
+
+
+		// dimensions
+		float _analysis_width;
+		float _analysis_height;
+
+		// My objects
+		FFT *_impulse_fft;
+		boost::shared_ptr<ARDOUR::Plugin> _plugin;
+
+		// gui objects
+		Gtk::DrawingArea *_analysis_area;
+		cairo_surface_t *_analysis_scale_surface;
+
+
+		// dB scale selection:
+		class dBSelectionColumns : public Gtk::TreeModel::ColumnRecord
+		{
+		  public:
+			dBSelectionColumns()
+				{ add(dBMin); add(dBMax); add(dBStep); add(name); }
+
+			Gtk::TreeModelColumn<float> dBMin;
+			Gtk::TreeModelColumn<float> dBMax;
+			Gtk::TreeModelColumn<float> dBStep;
+			Gtk::TreeModelColumn<Glib::ustring> name;
+		};
+
+		dBSelectionColumns dBColumns;
+
+		Gtk::ComboBox *dBScaleCombo;
+		Glib::RefPtr<Gtk::ListStore> dBScaleModel;
+
+		Gtk::CheckButton *_phase_button;
+
+		// signals and connections
+		sigc::connection _update_connection;
+		sigc::connection _window_unmap_connection;
+		sigc::connection _window_map_connection;
+};
+
+#endif
+