Initial revision

git-svn-id: svn://localhost/trunk/ardour2@4 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 291 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/fastmeter.cc b/libs/gtkmm2ext/fastmeter.cc
new file mode 100644
index 0000000000..3eff07e915
--- /dev/null
+++ b/libs/gtkmm2ext/fastmeter.cc
@@ -0,0 +1,291 @@
+/*
+    Copyright (C) 2003 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.
+
+    $Id$
+*/
+
+#include <iostream>
+#include <cmath>
+#include <algorithm>
+#include <gdkmm/rectangle.h>
+#include <gtkmm2ext/fastmeter.h>
+#include <gtkmm/style.h>
+
+using namespace Gtk;
+using namespace Gtkmm2ext;
+using namespace std;
+
+Glib::RefPtr<Gdk::Pixmap> *FastMeter::v_pixmap = 0;
+Glib::RefPtr<Gdk::Bitmap> *FastMeter::v_mask = 0;
+gint       FastMeter::v_pixheight = 0;
+gint       FastMeter::v_pixwidth = 0;
+
+Glib::RefPtr<Gdk::Pixmap> *FastMeter::h_pixmap = 0;
+Glib::RefPtr<Gdk::Bitmap> *FastMeter::h_mask = 0;
+gint       FastMeter::h_pixheight = 0;
+gint       FastMeter::h_pixwidth = 0;
+
+FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o)
+{
+	orientation = o;
+	hold_cnt = hold;
+	hold_state = 0;
+	current_peak = 0;
+	current_level = 0;
+	current_user_level = -100.0f;
+	
+	set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
+	
+	pixrect.set_x(0);
+	pixrect.set_y(0);
+
+	if (orientation == Vertical) {
+		pixrect.set_width(min (v_pixwidth, (gint) dimen));
+		pixrect.set_height(v_pixheight);
+	} else {
+		pixrect.set_width(h_pixwidth);
+		pixrect.set_height(min (h_pixheight, (gint) dimen));
+	}
+
+	request_width = pixrect.get_width();
+	request_height= pixrect.get_height();
+
+	backing = 0;
+}
+
+FastMeter::~FastMeter ()
+{
+	if (backing) {
+		(*backing)->unreference();
+	}
+}
+
+void
+FastMeter::set_vertical_xpm (const char **xpm)
+{
+	if (v_pixmap == 0) {
+		gint w, h;
+		
+		*v_pixmap = Gdk::Pixmap::create_from_xpm(Gdk::Colormap::get_system(), *v_mask, xpm);
+
+		(*v_pixmap)->get_size(w, h);
+		
+		v_pixheight = h;
+		v_pixwidth = w;
+	}
+}
+
+void
+FastMeter::set_horizontal_xpm (const char **xpm)
+{
+	if (h_pixmap == 0) {
+		gint w, h;
+		
+		*h_pixmap = Gdk::Pixmap::create_from_xpm(Gdk::Colormap::get_system(), *h_mask, xpm);
+
+		(*h_pixmap)->get_size(w, h);
+		
+		h_pixheight = h;
+		h_pixwidth = w;
+	}
+}
+
+void
+FastMeter::set_hold_count (long val)
+{
+	if (val < 1) {
+		val = 1;
+	}
+	
+	hold_cnt = val;
+	hold_state = 0;
+	current_peak = 0;
+	
+	queue_draw ();
+}
+
+void
+FastMeter::on_size_request (GtkRequisition* req)
+{
+	req->width = request_width;
+	req->height = request_height;
+}
+
+bool
+FastMeter::on_expose_event (GdkEventExpose* ev)
+{
+	if (orientation == Vertical) {
+		return vertical_expose (ev);
+	} else {
+		return horizontal_expose (ev);
+	}
+}
+
+bool
+FastMeter::vertical_expose (GdkEventExpose* ev)
+{
+	Gdk::Rectangle intersect;
+	gint top_of_meter;
+	bool blit = false;
+	bool intersecting = false;
+
+	top_of_meter = (gint) floor (v_pixheight * current_level);
+	pixrect.set_height(v_pixheight - top_of_meter); /* bottom of background */
+
+	if (backing == 0) {
+		*backing = Gdk::Pixmap::create (get_window(), get_width(), get_height());
+	}
+
+	intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
+	if (intersecting) {	
+
+		/* paint the background (black). */
+		(*backing)->draw_rectangle(get_style()->get_black_gc(), true, intersect.get_x(), intersect.get_y(), intersect.get_width(), intersect.get_height()); 
+		blit = true;
+	}
+	
+	pixrect.set_height(top_of_meter);
+
+        intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
+        if (intersecting) {
+		/* draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
+		 */
+
+		(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *v_pixmap, 
+					intersect.get_x(), v_pixheight - top_of_meter,
+					intersect.get_x(), v_pixheight - top_of_meter,
+					intersect.get_width(), intersect.get_height());
+		
+		blit = true;
+	}
+
+	/* draw peak bar */
+		
+	if (hold_state) {
+		(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *v_pixmap,
+				intersect.get_x(), v_pixheight - (gint) floor (v_pixheight * current_peak),
+				intersect.get_x(), v_pixheight - (gint) floor (v_pixheight * current_peak),
+				intersect.get_width(), 3);
+	}
+
+	/* bilt to on-screen drawable */
+
+	if (blit) {
+		Glib::RefPtr<Gdk::Window> win (get_window());
+		win->draw_drawable(get_style()->get_fg_gc(get_state()), *backing,
+				ev->area.x, ev->area.y,
+				ev->area.x, ev->area.y,
+				ev->area.width, ev->area.height);
+	}
+
+	return true;
+}
+
+bool
+FastMeter::horizontal_expose (GdkEventExpose* ev)
+{
+	Gdk::Rectangle intersect;
+	bool intersecting = false;
+	gint right_of_meter;
+	bool blit = false;
+
+	right_of_meter = (gint) floor (h_pixwidth * current_level);
+
+	pixrect.set_x(right_of_meter);
+	pixrect.set_y(0);
+	pixrect.set_width(h_pixwidth - right_of_meter); 
+	
+	if (backing == 0) {
+		*backing = Gdk::Pixmap::create(get_window(), get_width(), get_height());
+	}
+
+	intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
+	if (intersecting) {
+		/* paint the background (black). */
+		
+		(*backing)->draw_rectangle(get_style()->get_black_gc(), true,
+					intersect.get_x(), intersect.get_y(),
+					intersect.get_width(), intersect.get_height());
+		blit = true;
+	}
+	
+	pixrect.set_x(0);
+	pixrect.set_width(right_of_meter);
+
+	intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
+	if (intersecting) {
+		/* draw the part of the meter image that we need. 
+		 */
+
+		(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *h_pixmap,
+					intersect.get_x(), intersect.get_y(),
+					intersect.get_x(), intersect.get_y(),
+					intersect.get_width(), intersect.get_height());
+		
+		blit = true;
+	}
+
+	/* draw peak bar */
+		
+	if (hold_state) {
+		(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *h_pixmap,
+					right_of_meter, intersect.get_y(),
+					right_of_meter, intersect.get_y(),
+					3, intersect.get_height());
+	}
+
+	/* bilt to on-screen drawable */
+
+	if (blit) {
+		Glib::RefPtr<Gdk::Window> win(get_window());
+		win->draw_drawable(get_style()->get_fg_gc(get_state()), *backing,
+				ev->area.x, ev->area.y,
+				ev->area.x, ev->area.y,
+				ev->area.width, ev->area.height);
+	}
+
+	return true;
+}
+
+void
+FastMeter::set (float lvl, float usrlvl)
+{
+	current_level = lvl;
+	current_user_level = usrlvl;
+	
+	if (lvl > current_peak) {
+		current_peak = lvl;
+		hold_state = hold_cnt;
+	}
+	
+	if (hold_state > 0) {
+		if (--hold_state == 0) {
+			current_peak = lvl;
+		}
+	}
+
+	queue_draw ();
+}
+
+void
+FastMeter::clear ()
+{
+	current_level = 0;
+	current_peak = 0;
+	hold_state = 0;
+	queue_draw ();
+}