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Add methods in EngineControl for blocking and unblocking signals 

Only intended to be used with the nested SignalBlocker class
This commit is contained in:
Tim Mayberry 2015-08-09 23:16:02 +10:00
parent 324b5ffbac
commit 1bd15bef6c
2 changed files with 108 additions and 13 deletions
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92
gtk2_ardour/engine_dialog.cc
View File

@ -98,6 +98,7 @@ EngineControl::EngineControl ()
, _desired_sample_rate (0)
, started_at_least_once (false)
, queue_device_changed (false)
, block_signals(0)
{
using namespace Notebook_Helpers;
vector<string> backend_names;
@ -310,22 +311,87 @@ EngineControl::EngineControl ()
}
void
EngineDialog::connect_changed_signals ()
EngineControl::connect_changed_signals ()
{
backend_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::backend_changed));
driver_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::driver_changed));
sample_rate_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::sample_rate_changed));
buffer_size_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::buffer_size_changed));
device_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::device_changed));
midi_option_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::midi_option_changed));
backend_combo_connection = backend_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::backend_changed));
driver_combo_connection = driver_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::driver_changed));
sample_rate_combo_connection = sample_rate_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::sample_rate_changed));
buffer_size_combo_connection = buffer_size_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::buffer_size_changed));
device_combo_connection = device_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::device_changed));
midi_option_combo_connection = midi_option_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::midi_option_changed));
input_device_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::input_device_changed));
output_device_combo.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::output_device_changed));
input_device_combo_connection = input_device_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::input_device_changed));
output_device_combo_connection = output_device_combo.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::output_device_changed));
input_latency.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::parameter_changed));
output_latency.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::parameter_changed));
input_channels.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::parameter_changed));
output_channels.signal_changed().connect (sigc::mem_fun (*this, &EngineControl::parameter_changed));
input_latency_connection = input_latency.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::parameter_changed));
output_latency_connection = output_latency.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::parameter_changed));
input_channels_connection = input_channels.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::parameter_changed));
output_channels_connection = output_channels.signal_changed ().connect (
sigc::mem_fun (*this, &EngineControl::parameter_changed));
}
void
EngineControl::block_changed_signals ()
{
if (block_signals++ == 0) {
backend_combo_connection.block ();
driver_combo_connection.block ();
sample_rate_combo_connection.block ();
buffer_size_combo_connection.block ();
device_combo_connection.block ();
input_device_combo_connection.block ();
output_device_combo_connection.block ();
midi_option_combo_connection.block ();
input_latency_connection.block ();
output_latency_connection.block ();
input_channels_connection.block ();
output_channels_connection.block ();
}
}
void
EngineControl::unblock_changed_signals ()
{
if (--block_signals == 0) {
backend_combo_connection.unblock ();
driver_combo_connection.unblock ();
sample_rate_combo_connection.unblock ();
buffer_size_combo_connection.unblock ();
device_combo_connection.unblock ();
input_device_combo_connection.unblock ();
output_device_combo_connection.unblock ();
midi_option_combo_connection.unblock ();
input_latency_connection.unblock ();
output_latency_connection.unblock ();
input_channels_connection.unblock ();
output_channels_connection.unblock ();
}
}
EngineControl::SignalBlocker::SignalBlocker (EngineControl& engine_control,
const std::string& reason)
: ec (engine_control)
, m_reason (reason)
{
DEBUG_ECONTROL (string_compose ("SignalBlocker: %1", m_reason));
ec.block_changed_signals ();
}
EngineControl::SignalBlocker::~SignalBlocker ()
{
DEBUG_ECONTROL (string_compose ("~SignalBlocker: %1", m_reason));
ec.unblock_changed_signals ();
}
void

29
gtk2_ardour/engine_dialog.h
View File

@ -246,6 +246,35 @@ class EngineControl : public ArdourDialog, public PBD::ScopedConnectionList {
void build_no_control_notebook ();
void connect_changed_signals ();
void block_changed_signals ();
void unblock_changed_signals ();
class SignalBlocker
{
public:
SignalBlocker (EngineControl& engine_control, const std::string& reason);
~SignalBlocker ();
private:
EngineControl& ec;
std::string m_reason;
};
uint32_t block_signals;
sigc::connection backend_combo_connection;
sigc::connection driver_combo_connection;
sigc::connection sample_rate_combo_connection;
sigc::connection buffer_size_combo_connection;
sigc::connection device_combo_connection;
sigc::connection input_device_combo_connection;
sigc::connection output_device_combo_connection;
sigc::connection midi_option_combo_connection;
sigc::connection input_latency_connection;
sigc::connection output_latency_connection;
sigc::connection input_channels_connection;
sigc::connection output_channels_connection;
void on_show ();
void on_response (int);