From 34f0cb81fe8f6133c5d6d5c26af69486aa6d24ef Mon Sep 17 00:00:00 2001
From: dodoradio <dodoradio@outlook.com>
Date: Wed, 12 Jul 2023 20:28:18 +0100
Subject: Fix inverted altimeter behaviour and allow negative altimeter
 calibrations The altimeter was erroneously made to add to the sea level air
 pressure instead of subtracting from it, which resulted in inverted
 behaviour. This has now been fixed.

This also allows setting a negative altimeter offset
---
 src/Altimeter.qml    |  4 ++--
 src/SettingsPage.qml | 30 ++++++++++++++++++++++--------
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/src/Altimeter.qml b/src/Altimeter.qml
index ae71493..3ee11ac 100644
--- a/src/Altimeter.qml
+++ b/src/Altimeter.qml
@@ -44,13 +44,13 @@ Item {
         id: pressureText
         anchors.centerIn: parent
         horizontalAlignment: Text.AlignHCenter
-        text: Math.round(pressureSensor.reading.pressure/12 + altimeterOffset.value)
+        text: Math.round(-pressureSensor.reading.pressure/12 + altimeterOffset.value)
         font.pixelSize: parent.height / 4
     }
     ConfigurationValue {
         id: altimeterOffset
         key: "/org/asteroidos/sensors/altimeter-offset"
-        defaultValue: -8443
+        defaultValue: 8443
     }
     Label {
         anchors.horizontalCenter: parent.horizontalCenter
diff --git a/src/SettingsPage.qml b/src/SettingsPage.qml
index 4d36e7f..a0744a1 100644
--- a/src/SettingsPage.qml
+++ b/src/SettingsPage.qml
@@ -63,7 +63,7 @@ Item {
     ConfigurationValue {
         id: altimeterOffset
         key: "/org/asteroidos/sensors/altimeter-offset"
-        defaultValue: -8443
+        defaultValue: 8443
     }
     Component {
         id: barometerAdjustDialog
@@ -162,10 +162,18 @@ Item {
                 }
                 height: parent.height*0.6
 
+                CircularSpinner {
+                    id: signSelector
+                    height: parent.height
+                    width: parent.width/5
+                    model: 2
+                    showSeparator: false
+                    delegate: SpinnerDelegate { text: index ? "-" : "+" }
+                }
                 CircularSpinner {
                     id: thousandsSelector
                     height: parent.height
-                    width: parent.width/3
+                    width: parent.width/5
                     model: 10
                     showSeparator: false
                     delegate: SpinnerDelegate { text: index }
@@ -173,7 +181,7 @@ Item {
                 CircularSpinner {
                     id: hundredsSelector
                     height: parent.height
-                    width: parent.width/4
+                    width: parent.width/5
                     model: 10
                     showSeparator: false
                     delegate: SpinnerDelegate { text: index }
@@ -181,23 +189,26 @@ Item {
                 CircularSpinner {
                     id: tensSelector
                     height: parent.height
-                    width: parent.width/4
+                    width: parent.width/5
                     model: 10
                     delegate: SpinnerDelegate { text: index }
                 }
                 CircularSpinner {
                     id: onesSelector
                     height: parent.height
-                    width: parent.width/4
+                    width: parent.width/5
                     model: 10
-                    showSeparator: true
                     delegate: SpinnerDelegate { text: index }
                 }
             }
 
             Component.onCompleted: {
-                var currValue = Math.round(altimeterOffset.value + pressureSensor.reading.pressure/12);
+                var currValue = Math.round(altimeterOffset.value - pressureSensor.reading.pressure/12);
                 console.log(currValue)
+                if (currValue < 0) {
+                    currValue = -currValue
+                    signSelector.currentIndex = 1
+                }
                 thousandsSelector.currentIndex = Math.floor((currValue/1000))
                 hundredsSelector.currentIndex = Math.floor((currValue/100)%10)
                 tensSelector.currentIndex = Math.floor((currValue/10)%10)
@@ -214,7 +225,10 @@ Item {
 
                 onClicked: {
                     var newValue = thousandsSelector.currentIndex*1000 + hundredsSelector.currentIndex*100 + tensSelector.currentIndex*10 + onesSelector.currentIndex
-                    altimeterOffset.value = newValue - Math.round(pressureSensor.reading.pressure/12)
+                    if (signSelector.currentIndex) {
+                        newValue = -newValue
+                    }
+                    altimeterOffset.value = Math.round(pressureSensor.reading.pressure/12) + newValue
                     pageStack.pop(pageStack.currentLayer)
                 }
             }
-- 
cgit v1.2.3-70-g09d2