annoyance

app/src/main/java/com/mirenkov/ktheightmap/Config.kt

@@ -2,11 +2,7 @@ package com.mirenkov.ktheightmap
 
 class Config {
     companion object {
-        private var INSTANCE: Config = Config()
-        fun getInstance(): Config {
-            synchronized(this) {
-                return INSTANCE
-            }
-        }
+        const val MAP_START_OFFSET_X = -646.65625F
+        const val MAP_START_OFFSET_Y = -1157.2814F
     }
 }

app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt

@@ -6,6 +6,7 @@ import androidx.compose.foundation.gestures.detectDragGestures
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
@@ -17,6 +18,7 @@ import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.graphics.drawscope.DrawScope
 import androidx.compose.ui.graphics.drawscope.Stroke
 import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.ParagraphStyle
@@ -27,9 +29,12 @@ import androidx.compose.ui.text.drawText
 import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.withStyle
+import com.mirenkov.ktheightmap.Config.Companion.MAP_START_OFFSET_X
+import com.mirenkov.ktheightmap.Config.Companion.MAP_START_OFFSET_Y
 import com.mirenkov.ktheightmap.parser.KhmParser
 import kotlin.math.absoluteValue
 import kotlin.math.floor
+import kotlin.math.min
 import kotlin.math.pow
 import kotlin.math.sqrt
 
@@ -43,15 +48,20 @@ fun MapCanvas(
     modifier: Modifier = Modifier
 ) {
     val ctx = LocalContext.current
-    var offsetX by rememberSaveable { viewModel.mapOffsetX }
-    var offsetY by rememberSaveable { viewModel.mapOffsetY }
-    val scale by rememberSaveable { viewModel.scale }
+    var offsetX by remember { viewModel.mapOffsetX }
+    var offsetY by remember { viewModel.mapOffsetY }
+    val scale by remember { viewModel.scale }
     val textMeasurer = rememberTextMeasurer()
-    val debug by rememberSaveable { viewModel.debug }
-    var pointRequested by rememberSaveable { viewModel.pointRequested }
-    var pointLat by rememberSaveable { viewModel.rememberedPointLat }
-    var pointLon by rememberSaveable { viewModel.rememberedPointLon }
-    var pointHeight by rememberSaveable { viewModel.rememberedPointHeight }
+    val debug by remember { viewModel.debug }
+    var pointRequested by remember { viewModel.pointRequested }
+    var pointLat by remember { viewModel.rememberedPointLat }
+    var pointLon by remember { viewModel.rememberedPointLon }
+    var pointHeight by remember { viewModel.rememberedPointHeight }
+    var lastOrientation by rememberSaveable { viewModel.lastOrientation }
+    val orientationChanged = LocalConfiguration.current.orientation != lastOrientation
+    if (orientationChanged) {
+        lastOrientation = LocalConfiguration.current.orientation
+    }
     Canvas(
         modifier = modifier.fillMaxSize()
             .pointerInput(Unit) {
@@ -61,9 +71,15 @@ fun MapCanvas(
                 }
             }
     ) {
-        if (viewModel.halvedOffsetX == null) {
+        if (viewModel.halvedOffsetX == null || orientationChanged) {
             viewModel.halvedOffsetX = size.width / 2
             viewModel.halvedOffsetY = size.height / 2
+            if (orientationChanged) {
+                offsetX -= viewModel.halvedOffsetY!!
+                offsetX += viewModel.halvedOffsetX!!
+                offsetY -= viewModel.halvedOffsetX!!
+                offsetY += viewModel.halvedOffsetY!!
+            }
         }
         val halvedX = viewModel.halvedOffsetX!!
         val halvedY = viewModel.halvedOffsetY!!
@@ -241,7 +257,7 @@ fun DrawScope.drawPointInfo(
     val latDiff = lat - pointLat
     val lonDiff = lon - pointLon
     val distance = sqrt((latDiff).pow(2) + (lonDiff).pow(2))
-    val valuesCount = floor(distance / valueDistance).toInt()
+    val valuesCount = min(floor(distance / valueDistance).toInt(),1000)
     val array: Array<Pair<Float, Float>> = Array(valuesCount) { step ->
         val interCoef = 1F - step.toFloat() / valuesCount
         Pair(lon - lonDiff * interCoef, lat - latDiff * interCoef)

app/src/main/java/com/mirenkov/ktheightmap/TileContainer.kt

@@ -11,7 +11,7 @@ class TileContainer(private val vm: TileViewModel, private val coroutineScope: C
     private var endX = 0
     private var endY = 0
 
-    private var level = 1
+    private var level = 2
 
     fun getLevel(): Int = level
 

app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt

@@ -1,11 +1,14 @@
 package com.mirenkov.ktheightmap
 
 import android.app.Application
+import android.content.res.Configuration
 import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import com.mirenkov.ktheightmap.Config.Companion.MAP_START_OFFSET_X
+import com.mirenkov.ktheightmap.Config.Companion.MAP_START_OFFSET_Y
 
 class TileViewModel(application: Application): ViewModel() {
     val repository: TileRepository
@@ -16,8 +19,8 @@ class TileViewModel(application: Application): ViewModel() {
     var latitudeText = mutableStateOf(TextFieldValue(""))
     var longitudeText = mutableStateOf(TextFieldValue(""))
 
-    val mapOffsetX = mutableFloatStateOf(-646.65625F)
-    val mapOffsetY = mutableFloatStateOf(-1157.2814F)
+    val mapOffsetX = mutableFloatStateOf(MAP_START_OFFSET_X)
+    val mapOffsetY = mutableFloatStateOf(MAP_START_OFFSET_Y)
     val scale = mutableFloatStateOf(2F)
     var maxLevel = mutableIntStateOf(2)
 
@@ -28,6 +31,8 @@ class TileViewModel(application: Application): ViewModel() {
     var rememberedPointLat = mutableFloatStateOf(0F)
     var rememberedPointHeight = mutableIntStateOf(0)
 
+    var lastOrientation = mutableIntStateOf(Configuration.ORIENTATION_PORTRAIT)
+
     init {
         val tileDb = TileDB.getInstance(application)
         val tileDao = tileDb.tileDao()