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, 2 insertions, 0 deletions

diff --git a/desktop-widgets/preferences/preferences_graph.cpp b/desktop-widgets/preferences/preferences_graph.cpp
index ccc9aee65..91cd773d8 100644
--- a/desktop-widgets/preferences/preferences_graph.cpp
+++ b/desktop-widgets/preferences/preferences_graph.cpp
@@ -40,6 +40,7 @@ void PreferencesGraph::refreshSettings()
 	ui->vpmb_conservatism->setValue(prefs.vpmb_conservatism);
 	ui->show_ccr_setpoint->setChecked(prefs.show_ccr_setpoint);
 	ui->show_ccr_sensors->setChecked(prefs.show_ccr_sensors);
+	ui->show_scr_ocpo2->setChecked(prefs.show_scr_ocpo2);
 	ui->defaultSetpoint->setValue((double)prefs.defaultsetpoint / 1000.0);
 	ui->psro2rate->setValue(prefs.o2consumption / 1000.0);
 	ui->pscrfactor->setValue(lrint(1000.0 / prefs.pscr_ratio));
@@ -71,6 +72,7 @@ void PreferencesGraph::syncSettings()
 	tech->setVpmbConservatism(ui->vpmb_conservatism->value());
 	tech->setShowCCRSetpoint(ui->show_ccr_setpoint->isChecked());
 	tech->setShowCCRSensors(ui->show_ccr_sensors->isChecked());
+	tech->setShowSCROCpO2(ui->show_scr_ocpo2->isChecked());
 	tech->setDisplayUnusedTanks(ui->display_unused_tanks->isChecked());
 	tech->setShowAverageDepth(ui->show_average_depth->isChecked());
 	tech->setShowIcd(ui->show_icd->isChecked());