13
0
livetrax/libs/gtkmm2ext/fastmeter.cc

292 lines
6.7 KiB
C++
Raw Normal View History

/*
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 ();
}