Plot OC-pO2 graph for SCR dives

This commit allows plotting the OC-equivalent pO2 graph for PSCR
dives. This happens in both the cases where there is no external
O2-monitoring AND when there is external pO2 monitoring. The
calculations are only done for PSCR dives and is achieved as
follows:

1) Within plot-info create a pressure-t called OC_pO2 in
   profile.h and populate this variable with the open-circuit
   pO2 values in profile.c.
2) Create a new partialPressureGasItem ocpo2GasItem in
   profilewidget2.h and, in profilewidget2.cpp, initialise it
   to read the plot-info OC_pO2 values and enable its
   display by using the setVisible method. The
   diveplotdatamodel was also touched in order to achieve
   this.
3) Create a pref button that controls the display of OC-pO2 for SCR dives
4) Change the colour of the OC-pO2 grpah to orange
5) Change the connection of the crr_OC_pO2 signal to be appropriate
6) rename the OC_pO2 attribute to scr_OC-pO2

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>

1 files changed, 18 insertions, 0 deletions

diff --git a/core/subsurface-qt/SettingsObjectWrapper.cpp b/core/subsurface-qt/SettingsObjectWrapper.cpp
index cd1054b97..aaa907759 100644
--- a/core/subsurface-qt/SettingsObjectWrapper.cpp
+++ b/core/subsurface-qt/SettingsObjectWrapper.cpp
@@ -392,6 +392,11 @@ bool TechnicalDetailsSettings::rulerGraph() const
 	return prefs.rulergraph;
 }
 
+bool TechnicalDetailsSettings::showSCROCpO2() const
+{
+	return prefs.show_scr_ocpo2;
+}
+
 bool TechnicalDetailsSettings::showCCRSetpoint() const
 {
 	return prefs.show_ccr_setpoint;
@@ -667,6 +672,18 @@ void TechnicalDetailsSettings::setShowCCRSetpoint(bool value)
 	emit showCCRSetpointChanged(value);
 }
 
+void TechnicalDetailsSettings::setShowSCROCpO2(bool value)
+{
+	if (value == prefs.show_scr_ocpo2)
+		return;
+
+	QSettings s;
+	s.beginGroup(group);
+	s.setValue("show_scr_ocpo2", value);
+	prefs.show_scr_ocpo2 = value;
+	emit showSCROCpO2Changed(value);
+}
+
 void TechnicalDetailsSettings::setShowCCRSensors(bool value)
 {
 	if (value == prefs.show_ccr_sensors)
@@ -2222,6 +2239,7 @@ void SettingsObjectWrapper::load()
 	GET_BOOL("gf_low_at_maxdepth", gf_low_at_maxdepth);
 	GET_BOOL("show_ccr_setpoint",show_ccr_setpoint);
 	GET_BOOL("show_ccr_sensors",show_ccr_sensors);
+	GET_BOOL("show_scr_ocpo2",show_scr_ocpo2);
 	GET_BOOL("zoomed_plot", zoomed_plot);
 	set_gf(prefs.gflow, prefs.gfhigh);
 	set_vpmb_conservatism(prefs.vpmb_conservatism);