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livetrax/libs/gtkmm2ext/fastmeter.cc

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/*
Copyright (C) 2003-2006 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.
$Id$
*/
#include <iostream>
#include <cmath>
#include <algorithm>
#include <gdkmm/rectangle.h>
#include <gtkmm2ext/fastmeter.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm/style.h>
using namespace Gtk;
using namespace Gdk;
using namespace Glib;
using namespace Gtkmm2ext;
using namespace std;
string FastMeter::v_image_path;
string FastMeter::h_image_path;
RefPtr<Pixbuf> FastMeter::v_pixbuf;
gint FastMeter::v_pixheight = 0;
gint FastMeter::v_pixwidth = 0;
RefPtr<Pixbuf> FastMeter::h_pixbuf;
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 (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK);
pixrect.x = 0;
pixrect.y = 0;
if (!v_image_path.empty() && v_pixbuf == 0) {
v_pixbuf = Pixbuf::create_from_file (v_image_path);
v_pixheight = v_pixbuf->get_height();
v_pixwidth = v_pixbuf->get_width();
}
if (!h_image_path.empty() && h_pixbuf == 0) {
h_pixbuf = Pixbuf::create_from_file (h_image_path);
h_pixheight = h_pixbuf->get_height();
h_pixwidth = h_pixbuf->get_width();
}
if (orientation == Vertical) {
pixrect.width = min (v_pixwidth, (gint) dimen);
pixrect.height = v_pixheight;
} else {
pixrect.width = h_pixwidth;
pixrect.height = min (h_pixheight, (gint) dimen);
}
request_width = pixrect.width;
request_height= pixrect.height;
}
FastMeter::~FastMeter ()
{
}
void
FastMeter::set_vertical_xpm (std::string path)
{
v_image_path = path;
}
void
FastMeter::set_horizontal_xpm (std::string path)
{
h_image_path = path;
}
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)
{
gint top_of_meter;
GdkRectangle intersection;
GdkRectangle background;
top_of_meter = (gint) floor (v_pixheight * current_level);
pixrect.height = top_of_meter;
background.x = 0;
background.y = 0;
background.width = pixrect.width;
background.height = v_pixheight - top_of_meter;
if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
get_window()->draw_rectangle (get_style()->get_black_gc(), true,
intersection.x, intersection.y,
intersection.width, intersection.height);
}
if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
/* draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
*/
get_window()->draw_pixbuf(get_style()->get_fg_gc(get_state()), v_pixbuf,
intersection.x, v_pixheight - top_of_meter,
intersection.x, v_pixheight - top_of_meter,
intersection.width, intersection.height,
Gdk::RGB_DITHER_NONE, 0, 0);
}
/* draw peak bar */
if (hold_state) {
get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), v_pixbuf,
intersection.x, v_pixheight - (gint) floor (v_pixheight * current_peak),
intersection.x, v_pixheight - (gint) floor (v_pixheight * current_peak),
intersection.width, 3,
Gdk::RGB_DITHER_NONE, 0, 0);
}
return true;
}
bool
FastMeter::horizontal_expose (GdkEventExpose* ev)
{
GdkRectangle intersection;
gint right_of_meter;
right_of_meter = (gint) floor (h_pixwidth * current_level);
pixrect.width = right_of_meter;
if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
/* draw the part of the meter image that we need.
*/
get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), h_pixbuf,
intersection.x, intersection.y,
intersection.x, intersection.y,
intersection.width, intersection.height,
Gdk::RGB_DITHER_NONE, 0, 0);
}
/* draw peak bar */
if (hold_state) {
get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), h_pixbuf,
right_of_meter, intersection.y,
right_of_meter, intersection.y,
3, intersection.height,
Gdk::RGB_DITHER_NONE, 0, 0);
}
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 ();
}