292 lines
6.7 KiB
C++
292 lines
6.7 KiB
C++
/*
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Copyright (C) 2003 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <iostream>
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#include <cmath>
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#include <algorithm>
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#include <gdkmm/rectangle.h>
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#include <gtkmm2ext/fastmeter.h>
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#include <gtkmm/style.h>
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using namespace Gtk;
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using namespace Gtkmm2ext;
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using namespace std;
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Glib::RefPtr<Gdk::Pixmap> *FastMeter::v_pixmap = 0;
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Glib::RefPtr<Gdk::Bitmap> *FastMeter::v_mask = 0;
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gint FastMeter::v_pixheight = 0;
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gint FastMeter::v_pixwidth = 0;
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Glib::RefPtr<Gdk::Pixmap> *FastMeter::h_pixmap = 0;
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Glib::RefPtr<Gdk::Bitmap> *FastMeter::h_mask = 0;
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gint FastMeter::h_pixheight = 0;
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gint FastMeter::h_pixwidth = 0;
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FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o)
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{
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orientation = o;
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hold_cnt = hold;
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hold_state = 0;
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current_peak = 0;
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current_level = 0;
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current_user_level = -100.0f;
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set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
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pixrect.set_x(0);
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pixrect.set_y(0);
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if (orientation == Vertical) {
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pixrect.set_width(min (v_pixwidth, (gint) dimen));
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pixrect.set_height(v_pixheight);
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} else {
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pixrect.set_width(h_pixwidth);
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pixrect.set_height(min (h_pixheight, (gint) dimen));
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}
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request_width = pixrect.get_width();
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request_height= pixrect.get_height();
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backing = 0;
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}
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FastMeter::~FastMeter ()
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{
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if (backing) {
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(*backing)->unreference();
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}
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}
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void
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FastMeter::set_vertical_xpm (const char **xpm)
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{
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if (v_pixmap == 0) {
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gint w, h;
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*v_pixmap = Gdk::Pixmap::create_from_xpm(Gdk::Colormap::get_system(), *v_mask, xpm);
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(*v_pixmap)->get_size(w, h);
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v_pixheight = h;
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v_pixwidth = w;
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}
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}
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void
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FastMeter::set_horizontal_xpm (const char **xpm)
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{
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if (h_pixmap == 0) {
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gint w, h;
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*h_pixmap = Gdk::Pixmap::create_from_xpm(Gdk::Colormap::get_system(), *h_mask, xpm);
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(*h_pixmap)->get_size(w, h);
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h_pixheight = h;
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h_pixwidth = w;
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}
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}
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void
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FastMeter::set_hold_count (long val)
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{
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if (val < 1) {
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val = 1;
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}
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hold_cnt = val;
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hold_state = 0;
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current_peak = 0;
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queue_draw ();
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}
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void
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FastMeter::on_size_request (GtkRequisition* req)
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{
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req->width = request_width;
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req->height = request_height;
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}
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bool
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FastMeter::on_expose_event (GdkEventExpose* ev)
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{
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if (orientation == Vertical) {
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return vertical_expose (ev);
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} else {
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return horizontal_expose (ev);
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}
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}
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bool
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FastMeter::vertical_expose (GdkEventExpose* ev)
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{
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Gdk::Rectangle intersect;
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gint top_of_meter;
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bool blit = false;
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bool intersecting = false;
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top_of_meter = (gint) floor (v_pixheight * current_level);
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pixrect.set_height(v_pixheight - top_of_meter); /* bottom of background */
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if (backing == 0) {
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*backing = Gdk::Pixmap::create (get_window(), get_width(), get_height());
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}
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intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
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if (intersecting) {
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/* paint the background (black). */
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(*backing)->draw_rectangle(get_style()->get_black_gc(), true, intersect.get_x(), intersect.get_y(), intersect.get_width(), intersect.get_height());
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blit = true;
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}
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pixrect.set_height(top_of_meter);
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intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
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if (intersecting) {
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/* draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
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*/
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(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *v_pixmap,
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intersect.get_x(), v_pixheight - top_of_meter,
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intersect.get_x(), v_pixheight - top_of_meter,
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intersect.get_width(), intersect.get_height());
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blit = true;
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}
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/* draw peak bar */
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if (hold_state) {
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(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *v_pixmap,
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intersect.get_x(), v_pixheight - (gint) floor (v_pixheight * current_peak),
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intersect.get_x(), v_pixheight - (gint) floor (v_pixheight * current_peak),
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intersect.get_width(), 3);
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}
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/* bilt to on-screen drawable */
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if (blit) {
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Glib::RefPtr<Gdk::Window> win (get_window());
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win->draw_drawable(get_style()->get_fg_gc(get_state()), *backing,
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ev->area.x, ev->area.y,
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ev->area.x, ev->area.y,
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ev->area.width, ev->area.height);
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}
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return true;
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}
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bool
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FastMeter::horizontal_expose (GdkEventExpose* ev)
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{
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Gdk::Rectangle intersect;
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bool intersecting = false;
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gint right_of_meter;
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bool blit = false;
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right_of_meter = (gint) floor (h_pixwidth * current_level);
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pixrect.set_x(right_of_meter);
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pixrect.set_y(0);
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pixrect.set_width(h_pixwidth - right_of_meter);
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if (backing == 0) {
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*backing = Gdk::Pixmap::create(get_window(), get_width(), get_height());
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}
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intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
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if (intersecting) {
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/* paint the background (black). */
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(*backing)->draw_rectangle(get_style()->get_black_gc(), true,
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intersect.get_x(), intersect.get_y(),
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intersect.get_width(), intersect.get_height());
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blit = true;
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}
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pixrect.set_x(0);
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pixrect.set_width(right_of_meter);
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intersect = pixrect.intersect(Glib::wrap(&ev->area), intersecting);
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if (intersecting) {
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/* draw the part of the meter image that we need.
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*/
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(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *h_pixmap,
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intersect.get_x(), intersect.get_y(),
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intersect.get_x(), intersect.get_y(),
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intersect.get_width(), intersect.get_height());
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blit = true;
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}
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/* draw peak bar */
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if (hold_state) {
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(*backing)->draw_drawable(get_style()->get_fg_gc(get_state()), *h_pixmap,
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right_of_meter, intersect.get_y(),
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right_of_meter, intersect.get_y(),
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3, intersect.get_height());
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}
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/* bilt to on-screen drawable */
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if (blit) {
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Glib::RefPtr<Gdk::Window> win(get_window());
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win->draw_drawable(get_style()->get_fg_gc(get_state()), *backing,
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ev->area.x, ev->area.y,
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ev->area.x, ev->area.y,
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ev->area.width, ev->area.height);
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}
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return true;
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}
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void
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FastMeter::set (float lvl, float usrlvl)
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{
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current_level = lvl;
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current_user_level = usrlvl;
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if (lvl > current_peak) {
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current_peak = lvl;
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hold_state = hold_cnt;
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}
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if (hold_state > 0) {
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if (--hold_state == 0) {
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current_peak = lvl;
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}
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}
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queue_draw ();
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}
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void
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FastMeter::clear ()
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{
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current_level = 0;
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current_peak = 0;
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hold_state = 0;
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queue_draw ();
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}
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