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ardour/gtk2_ardour/gain_meter.cc

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/*
Copyright (C) 2002 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.
*/
#include <limits.h>
#include <ardour/io.h>
#include <ardour/route.h>
#include <ardour/route_group.h>
#include <ardour/session.h>
#include <ardour/session_route.h>
#include <ardour/dB.h>
#include <gtkmm/style.h>
#include <gdkmm/color.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/fastmeter.h>
#include <gtkmm2ext/stop_signal.h>
#include <gtkmm2ext/barcontroller.h>
#include <gtkmm2ext/gtk_ui.h>
#include <midi++/manager.h>
#include <pbd/fastlog.h>
#include "ardour_ui.h"
#include "gain_meter.h"
#include "utils.h"
#include "logmeter.h"
#include "gui_thread.h"
#include "keyboard.h"
#include "public_editor.h"
#include <ardour/session.h>
#include <ardour/route.h>
#include <ardour/meter.h>
#include "i18n.h"
using namespace ARDOUR;
using namespace PBD;
using namespace Gtkmm2ext;
using namespace Gtk;
using namespace sigc;
using namespace std;
sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
void
GainMeter::setup_slider_pix ()
{
if ((slider = ::get_icon ("fader_belt")) == 0) {
throw failed_constructor();
}
}
GainMeterBase::GainMeterBase (Session& s,
const Glib::RefPtr<Gdk::Pixbuf>& pix,
bool horizontal)
: _session (s),
// 0.781787 is the value needed for gain to be set to 0.
gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1),
gain_automation_style_button (""),
gain_automation_state_button ("")
{
using namespace Menu_Helpers;
ignore_toggle = false;
meter_menu = 0;
next_release_selects = false;
style_changed = true;
_width = Wide;
if (horizontal) {
gain_slider = manage (new HSliderController (pix,
&gain_adjustment,
false));
} else {
gain_slider = manage (new VSliderController (pix,
&gain_adjustment,
false));
}
level_meter = new LevelMeter(_session);
gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
gain_slider->set_name ("GainFader");
gain_display.set_name ("MixerStripGainDisplay");
gain_display.set_has_frame (false);
set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
gain_display.signal_activate().connect (mem_fun (*this, &GainMeter::gain_activated));
gain_display.signal_focus_in_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
gain_display.signal_focus_out_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
peak_display.set_name ("MixerStripPeakDisplay");
// peak_display.set_has_frame (false);
// peak_display.set_editable (false);
set_size_request_to_display_given_text (peak_display, "-80.g", 2, 6); /* note the descender */
max_peak = minus_infinity();
peak_display.set_label (_("-inf"));
peak_display.unset_flags (Gtk::CAN_FOCUS);
gain_automation_style_button.set_name ("MixerAutomationModeButton");
gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
gain_automation_state_button.set_size_request(15, 15);
gain_automation_style_button.set_size_request(15, 15);
gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
gain_astate_menu.set_name ("ArdourContextMenu");
gain_astyle_menu.set_name ("ArdourContextMenu");
gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeterBase::gain_adjusted));
peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeterBase::peak_button_release), false);
gain_display.signal_key_press_event().connect (mem_fun(*this, &GainMeterBase::gain_key_press), false);
ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_peak_display));
ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_group_peak_display));
UI::instance()->theme_changed.connect (mem_fun(*this, &GainMeterBase::on_theme_changed));
ColorsChanged.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), false));
DPIReset.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), true));
}
GainMeterBase::~GainMeterBase ()
{
delete meter_menu;
delete level_meter;
}
void
GainMeterBase::set_io (boost::shared_ptr<IO> io)
{
connections.clear ();
_io = io;
level_meter->set_io (_io);
gain_slider->set_controllable (_io->gain_control());
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
if (!r->is_hidden()) {
using namespace Menu_Helpers;
gain_astate_menu.items().clear ();
gain_astate_menu.items().push_back (MenuElem (_("Manual"),
bind (mem_fun (*_io, &IO::set_parameter_automation_state),
Evoral::Parameter(GainAutomation), (AutoState) Off)));
gain_astate_menu.items().push_back (MenuElem (_("Play"),
bind (mem_fun (*_io, &IO::set_parameter_automation_state),
Evoral::Parameter(GainAutomation), (AutoState) Play)));
gain_astate_menu.items().push_back (MenuElem (_("Write"),
bind (mem_fun (*_io, &IO::set_parameter_automation_state),
Evoral::Parameter(GainAutomation), (AutoState) Write)));
gain_astate_menu.items().push_back (MenuElem (_("Touch"),
bind (mem_fun (*_io, &IO::set_parameter_automation_state),
Evoral::Parameter(GainAutomation), (AutoState) Touch)));
connections.push_back (gain_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
connections.push_back (gain_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
connections.push_back (r->gain_control()->alist()->automation_state_changed.connect (mem_fun(*this, &GainMeter::gain_automation_state_changed)));
connections.push_back (r->gain_control()->alist()->automation_style_changed.connect (mem_fun(*this, &GainMeter::gain_automation_style_changed)));
gain_automation_state_changed ();
}
}
connections.push_back (_io->gain_control()->Changed.connect (mem_fun(*this, &GainMeterBase::gain_changed)));
gain_changed ();
show_gain ();
update_gain_sensitive ();
}
void
GainMeterBase::hide_all_meters ()
{
level_meter->hide_meters();
}
void
GainMeter::hide_all_meters ()
{
bool remove_metric_area = false;
GainMeterBase::hide_all_meters ();
if (remove_metric_area) {
if (meter_metric_area.get_parent()) {
level_meter->remove (meter_metric_area);
}
}
}
void
GainMeterBase::setup_meters (int len)
{
level_meter->setup_meters(len, 5);
}
void
GainMeter::setup_meters (int len)
{
if (!meter_metric_area.get_parent()) {
level_meter->pack_end (meter_metric_area, false, false);
meter_metric_area.show_all ();
}
GainMeterBase::setup_meters (len);
}
bool
GainMeterBase::gain_key_press (GdkEventKey* ev)
{
if (key_is_legal_for_numeric_entry (ev->keyval)) {
/* drop through to normal handling */
return false;
}
/* illegal key for gain entry */
return true;
}
bool
GainMeterBase::peak_button_release (GdkEventButton* ev)
{
/* reset peak label */
if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
ResetAllPeakDisplays ();
} else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
ResetGroupPeakDisplays (r->mix_group());
}
} else {
reset_peak_display ();
}
return true;
}
void
GainMeterBase::reset_peak_display ()
{
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
r->peak_meter().reset_max();
}
level_meter->clear_meters();
max_peak = -INFINITY;
peak_display.set_label (_("-Inf"));
peak_display.set_name ("MixerStripPeakDisplay");
}
void
GainMeterBase::reset_group_peak_display (RouteGroup* group)
{
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
if (group == r->mix_group()) {
reset_peak_display ();
}
}
}
void
GainMeterBase::popup_meter_menu (GdkEventButton *ev)
{
using namespace Menu_Helpers;
if (meter_menu == 0) {
meter_menu = new Gtk::Menu;
MenuList& items = meter_menu->items();
items.push_back (MenuElem ("-inf .. +0dBFS"));
items.push_back (MenuElem ("-10dB .. +0dBFS"));
items.push_back (MenuElem ("-4 .. +0dBFS"));
items.push_back (SeparatorElem());
items.push_back (MenuElem ("-inf .. -2dBFS"));
items.push_back (MenuElem ("-10dB .. -2dBFS"));
items.push_back (MenuElem ("-4 .. -2dBFS"));
}
meter_menu->popup (1, ev->time);
}
bool
GainMeterBase::gain_focused (GdkEventFocus* ev)
{
if (ev->in) {
gain_display.select_region (0, -1);
} else {
gain_display.select_region (0, 0);
}
return false;
}
void
GainMeterBase::gain_activated ()
{
float f;
if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
/* clamp to displayable values */
f = min (f, 6.0f);
_io->gain_control()->set_value (dB_to_coefficient(f));
if (gain_display.has_focus()) {
PublicEditor::instance().reset_focus();
}
}
}
void
GainMeterBase::show_gain ()
{
char buf[32];
float v = gain_adjustment.get_value();
if (v == 0.0) {
strcpy (buf, _("-inf"));
} else {
snprintf (buf, 32, "%.1f", coefficient_to_dB (slider_position_to_gain (v)));
}
gain_display.set_text (buf);
}
void
GainMeterBase::gain_adjusted ()
{
if (!ignore_toggle) {
_io->gain_control()->set_value (slider_position_to_gain (gain_adjustment.get_value()));
}
show_gain ();
}
void
GainMeterBase::effective_gain_display ()
{
gfloat value = gain_to_slider_position (_io->effective_gain());
if (gain_adjustment.get_value() != value) {
ignore_toggle = true;
gain_adjustment.set_value (value);
ignore_toggle = false;
}
}
void
GainMeterBase::gain_changed ()
{
Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeterBase::effective_gain_display));
}
void
GainMeterBase::set_meter_strip_name (const char * name)
{
meter_metric_area.set_name (name);
}
void
GainMeterBase::set_fader_name (const char * name)
{
gain_slider->set_name (name);
}
void
GainMeterBase::update_gain_sensitive ()
{
static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (
!(_io->gain_control()->alist()->automation_state() & Play));
}
static MeterPoint
next_meter_point (MeterPoint mp)
{
switch (mp) {
case MeterInput:
return MeterPreFader;
break;
case MeterPreFader:
return MeterPostFader;
break;
case MeterPostFader:
return MeterInput;
break;
}
/*NOTREACHED*/
return MeterInput;
}
gint
GainMeterBase::meter_press(GdkEventButton* ev)
{
boost::shared_ptr<Route> _route;
wait_for_release = false;
if ((_route = boost::dynamic_pointer_cast<Route>(_io)) == 0) {
return FALSE;
}
if (!ignore_toggle) {
if (Keyboard::is_context_menu_event (ev)) {
// no menu at this time.
} else {
if (Keyboard::is_button2_event(ev)) {
// Primary-button2 click is the midi binding click
// button2-click is "momentary"
if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
wait_for_release = true;
old_meter_point = _route->meter_point ();
}
}
if (ev->button == 1 || Keyboard::is_button2_event (ev)) {
if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
/* Primary+Tertiary-click applies change to all routes */
_session.begin_reversible_command (_("meter point change"));
Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
_session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
cmd->mark();
_session.add_command (cmd);
_session.commit_reversible_command ();
} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
/* Primary-click: solo mix group.
NOTE: Primary-button2 is MIDI learn.
*/
if (ev->button == 1) {
_session.begin_reversible_command (_("meter point change"));
Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
cmd->mark();
_session.add_command (cmd);
_session.commit_reversible_command ();
}
} else {
/* click: change just this route */
// XXX no undo yet
_route->set_meter_point (next_meter_point (_route->meter_point()), this);
}
}
}
}
return true;
}
gint
GainMeterBase::meter_release(GdkEventButton* ev)
{
if(!ignore_toggle){
if (wait_for_release){
wait_for_release = false;
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route>(_io)) != 0) {
set_meter_point (*r, old_meter_point);
}
}
}
return true;
}
void
GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
{
route.set_meter_point (mp, this);
}
void
GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
{
RouteGroup* mix_group;
if((mix_group = route.mix_group()) != 0){
mix_group->apply (&Route::set_meter_point, mp, this);
} else {
route.set_meter_point (mp, this);
}
}
void
GainMeterBase::meter_point_clicked ()
{
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
/* WHAT? */
}
}
gint
GainMeterBase::start_gain_touch (GdkEventButton* ev)
{
_io->gain_control()->alist()->start_touch ();
return FALSE;
}
gint
GainMeterBase::end_gain_touch (GdkEventButton* ev)
{
_io->gain_control()->alist()->stop_touch ();
return FALSE;
}
gint
GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
{
if (ev->type == GDK_BUTTON_RELEASE) {
return TRUE;
}
switch (ev->button) {
case 1:
gain_astate_menu.popup (1, ev->time);
break;
default:
break;
}
return TRUE;
}
gint
GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
{
if (ev->type == GDK_BUTTON_RELEASE) {
return TRUE;
}
switch (ev->button) {
case 1:
gain_astyle_menu.popup (1, ev->time);
break;
default:
break;
}
return TRUE;
}
string
GainMeterBase::astate_string (AutoState state)
{
return _astate_string (state, false);
}
string
GainMeterBase::short_astate_string (AutoState state)
{
return _astate_string (state, true);
}
string
GainMeterBase::_astate_string (AutoState state, bool shrt)
{
string sstr;
switch (state) {
case Off:
sstr = (shrt ? "M" : _("M"));
break;
case Play:
sstr = (shrt ? "P" : _("P"));
break;
case Touch:
sstr = (shrt ? "T" : _("T"));
break;
case Write:
sstr = (shrt ? "W" : _("W"));
break;
}
return sstr;
}
string
GainMeterBase::astyle_string (AutoStyle style)
{
return _astyle_string (style, false);
}
string
GainMeterBase::short_astyle_string (AutoStyle style)
{
return _astyle_string (style, true);
}
string
GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
{
if (style & Trim) {
return _("Trim");
} else {
/* XXX it might different in different languages */
return (shrt ? _("Abs") : _("Abs"));
}
}
void
GainMeterBase::gain_automation_style_changed ()
{
switch (_width) {
case Wide:
gain_automation_style_button.set_label (astyle_string(_io->gain_control()->alist()->automation_style()));
break;
case Narrow:
gain_automation_style_button.set_label (short_astyle_string(_io->gain_control()->alist()->automation_style()));
break;
}
}
void
GainMeterBase::gain_automation_state_changed ()
{
ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
bool x;
switch (_width) {
case Wide:
gain_automation_state_button.set_label (astate_string(_io->gain_control()->alist()->automation_state()));
break;
case Narrow:
gain_automation_state_button.set_label (short_astate_string(_io->gain_control()->alist()->automation_state()));
break;
}
x = (_io->gain_control()->alist()->automation_state() != Off);
if (gain_automation_state_button.get_active() != x) {
ignore_toggle = true;
gain_automation_state_button.set_active (x);
ignore_toggle = false;
}
update_gain_sensitive ();
/* start watching automation so that things move */
gain_watching.disconnect();
if (x) {
gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
}
}
void
GainMeterBase::update_meters()
{
char buf[32];
float mpeak = level_meter->update_meters();
if (mpeak > max_peak) {
max_peak = mpeak;
if (mpeak <= -200.0f) {
peak_display.set_label (_("-inf"));
} else {
snprintf (buf, sizeof(buf), "%.1f", mpeak);
peak_display.set_label (buf);
}
if (mpeak >= 0.0f) {
peak_display.set_name ("MixerStripPeakDisplayPeak");
}
}
}
void GainMeterBase::color_handler(bool dpi)
{
color_changed = true;
dpi_changed = (dpi) ? true : false;
setup_meters();
}
void
GainMeterBase::set_width (Width w, int len)
{
_width = w;
level_meter->setup_meters (len);
}
void
GainMeterBase::on_theme_changed()
{
style_changed = true;
}
GainMeter::GainMeter (Session& s)
: GainMeterBase (s, slider, false)
{
gain_display_box.set_homogeneous (true);
gain_display_box.set_spacing (2);
gain_display_box.pack_start (gain_display, true, true);
meter_metric_area.set_name ("AudioTrackMetrics");
set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
gain_automation_style_button.set_name ("MixerAutomationModeButton");
gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
gain_automation_state_button.set_size_request(15, 15);
gain_automation_style_button.set_size_request(15, 15);
HBox* fader_centering_box = manage (new HBox);
fader_centering_box->pack_start (*gain_slider, true, false);
fader_vbox = manage (new Gtk::VBox());
fader_vbox->set_spacing (0);
fader_vbox->pack_start (*fader_centering_box, false, false, 0);
hbox.set_spacing (2);
hbox.pack_start (*fader_vbox, true, true);
set_spacing (2);
pack_start (gain_display_box, Gtk::PACK_SHRINK);
pack_start (hbox, Gtk::PACK_SHRINK);
meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
}
void
GainMeter::set_io (boost::shared_ptr<IO> io)
{
if (level_meter->get_parent()) {
hbox.remove (*level_meter);
}
if (peak_display.get_parent()) {
gain_display_box.remove (peak_display);
}
if (gain_automation_state_button.get_parent()) {
fader_vbox->remove (gain_automation_state_button);
}
GainMeterBase::set_io (io);
boost::shared_ptr<Route> r;
if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
/*
if we have a non-hidden route (ie. we're not the click or the auditioner),
pack some route-dependent stuff.
*/
gain_display_box.pack_end (peak_display, true, true);
hbox.pack_end (*level_meter, true, true);
if (!r->is_hidden()) {
fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
}
}
}
int
GainMeter::get_gm_width ()
{
Gtk::Requisition sz;
hbox.size_request (sz);
return sz.width;
}
Glib::RefPtr<Gdk::Pixmap>
GainMeter::render_metrics (Gtk::Widget& w)
{
Glib::RefPtr<Gdk::Window> win (w.get_window());
Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
gint width, height;
int db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
char buf[32];
win->get_size (width, height);
Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
metric_pixmaps[w.get_name()] = pixmap;
pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
float fraction = log_meter (db_points[i]);
gint pos = height - (gint) floor (height * fraction);
snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
layout->set_text (buf);
/* we want logical extents, not ink extents here */
int width, height;
layout->get_pixel_size (width, height);
pixmap->draw_line (fg_gc, 0, pos, 4, pos);
pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);
}
return pixmap;
}
gint
GainMeter::meter_metrics_expose (GdkEventExpose *ev)
{
static Glib::RefPtr<Gtk::Style> meter_style;
if (style_changed) {
meter_style = meter_metric_area.get_style();
}
Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
Glib::RefPtr<Gdk::GC> bg_gc (meter_style->get_bg_gc (Gtk::STATE_INSENSITIVE));
GdkRectangle base_rect;
GdkRectangle draw_rect;
gint width, height;
win->get_size (width, height);
base_rect.width = width;
base_rect.height = height;
base_rect.x = 0;
base_rect.y = 0;
Glib::RefPtr<Gdk::Pixmap> pixmap;
std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
if (i == metric_pixmaps.end() || style_changed || dpi_changed) {
pixmap = render_metrics (meter_metric_area);
} else {
pixmap = i->second;
}
gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
style_changed = false;
return true;
}
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