From 56dc5211e711a2b8f4cc8017eac25255e1150686 Mon Sep 17 00:00:00 2001
From: 115ek <e.blosz@hotmail.de>
Date: Tue, 30 Jun 2020 12:24:47 +0200
Subject: [PATCH] TLW64: Support setting displaysettings

* 24h/12h clock
* metric/imperial units
---
 .../devices/tlw64/TLW64Constants.java         |  1 +
 .../service/devices/tlw64/TLW64Support.java   | 26 +++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/tlw64/TLW64Constants.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/tlw64/TLW64Constants.java
index be1d2e91e..26b12bc78 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/tlw64/TLW64Constants.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/tlw64/TLW64Constants.java
@@ -25,6 +25,7 @@ public final class TLW64Constants {
     public static final UUID UUID_CHARACTERISTIC_CONTROL = UUID.fromString("000033f1-0000-1000-8000-00805f9b34fb");
 
     // Command bytes
+    public static final byte CMD_DISPLAY_SETTINGS = (byte) 0xa0;
     public static final byte CMD_DATETIME = (byte) 0xa3;
     public static final byte CMD_ALARM = (byte) 0xab;
 
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/tlw64/TLW64Support.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/tlw64/TLW64Support.java
index d2667234a..54fcdee44 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/tlw64/TLW64Support.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/tlw64/TLW64Support.java
@@ -21,6 +21,7 @@ package nodomain.freeyourgadget.gadgetbridge.service.devices.tlw64;
 
 import android.bluetooth.BluetoothGattCharacteristic;
 import android.net.Uri;
+import android.text.format.DateFormat;
 import android.widget.Toast;
 
 import org.slf4j.Logger;
@@ -32,6 +33,9 @@ import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.UUID;
 
+import nodomain.freeyourgadget.gadgetbridge.GBApplication;
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.activities.SettingsActivity;
 import nodomain.freeyourgadget.gadgetbridge.devices.tlw64.TLW64Constants;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.Alarm;
@@ -67,6 +71,7 @@ public class TLW64Support extends AbstractBTLEDeviceSupport {
         ctrlCharacteristic = getCharacteristic(TLW64Constants.UUID_CHARACTERISTIC_CONTROL);
 
         setTime(builder);
+        setDisplaySettings(builder);
 
         builder.add(new SetDeviceStateAction(getDevice(), GBDevice.State.INITIALIZED, getContext()));
 
@@ -272,4 +277,25 @@ public class TLW64Support extends AbstractBTLEDeviceSupport {
         };
         transaction.write(ctrlCharacteristic, datetimeBytes);
     }
+
+    private void setDisplaySettings(TransactionBuilder transaction) {
+        byte[] displayBytes = new byte[]{
+                TLW64Constants.CMD_DISPLAY_SETTINGS,
+                0x00,   // 1 - display distance in kilometers, 2 - in miles
+                0x00    // 1 - display 24-hour clock, 2 - for 12-hour with AM/PM
+        };
+        String units = GBApplication.getPrefs().getString(SettingsActivity.PREF_MEASUREMENT_SYSTEM, getContext().getString(R.string.p_unit_metric));
+        if (units.equals(getContext().getString(R.string.p_unit_metric))) {
+            displayBytes[1] = 1;
+        } else {
+            displayBytes[1] = 2;
+        }
+        if (DateFormat.is24HourFormat(getContext())) {
+            displayBytes[2] = 1;
+        } else {
+            displayBytes[2] = 2;
+        }
+        transaction.write(ctrlCharacteristic, displayBytes);
+        return;
+    }
 }