feat: Add information for value of 1 for conversions

Signed-off-by: Myzel394 <50424412+Myzel394@users.noreply.github.com>

feature/converter/src/main/java/app/myzel394/numberhub/feature/converter/ConverterScreen.kt

@@ -106,6 +106,7 @@ import app.myzel394.numberhub.feature.converter.components.BaseCalculationSummar
 import app.myzel394.numberhub.feature.converter.components.DefaultKeyboard
 import app.myzel394.numberhub.feature.converter.components.NumberBaseKeyboard
 import app.myzel394.numberhub.feature.converter.components.UnitSelectionButton
+import app.myzel394.numberhub.feature.converter.components.ValueOneSummary
 import java.math.BigDecimal
 import java.util.Locale
 import kotlin.math.absoluteValue
@@ -331,6 +332,20 @@ private fun Default(
     }
     var focusedOnInput1 by rememberSaveable { mutableStateOf(true) }
 
+    val density = LocalDensity.current
+    val dragState = remember {
+        AnchoredDraggableState(
+            initialValue = DragState.CLOSED,
+            anchors = DraggableAnchors {
+                DragState.CLOSED at 0f
+                DragState.OPEN at with(density) { -60.dp.toPx() }
+            },
+            positionalThreshold = { 0f },
+            velocityThreshold = { 0f },
+            animationSpec = tween(easing = LinearEasing, durationMillis = 50),
+        )
+    }
+
     LaunchedEffect(connection) {
         if ((connection == ConnectionState.Available) and (uiState.result is ConverterResult.Error)) {
             val unitFrom = uiState.unitFrom
@@ -351,7 +366,13 @@ private fun Default(
     PortraitLandscape(
         modifier = modifier.fillMaxSize(),
         content1 = { contentModifier ->
-            ColumnWithConstraints(modifier = contentModifier) { boxWithConstraintsScope ->
+            ColumnWithConstraints(
+                modifier = contentModifier
+                    .anchoredDraggable(
+                        state = dragState,
+                        orientation = Orientation.Vertical,
+                    ),
+            ) { boxWithConstraintsScope ->
                 val textFieldModifier = Modifier
                     .fillMaxWidth()
                     .weight(2f)
@@ -472,6 +493,16 @@ private fun Default(
                     ),
                 )
 
+                ValueOneSummary(
+                    modifier = with(density) {
+                        Modifier
+                            .fillMaxWidth()
+                            .height(dragState.offset.absoluteValue.toDp())
+                            .horizontalScroll(rememberScrollState())
+                    },
+                    uiState = uiState,
+                )
+
                 Spacer(modifier = Modifier.height(boxWithConstraintsScope.maxHeight * 0.03f))
 
                 UnitSelectionButtons(

feature/converter/src/main/java/app/myzel394/numberhub/feature/converter/components/ValueOneSummary.kt

@@ -0,0 +1,74 @@
+package app.myzel394.numberhub.feature.converter.components
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import app.myzel394.numberhub.data.common.format
+import app.myzel394.numberhub.feature.converter.UnitConverterUIState
+import java.math.BigDecimal
+
+@Composable
+internal fun ValueOneSummary(
+    modifier: Modifier = Modifier,
+    uiState: UnitConverterUIState.Default,
+) {
+    val unitFromLabel = LocalContext.current.getString(uiState.unitFrom.displayName)
+    val unitToLabel = LocalContext.current.getString(uiState.unitTo.displayName)
+    val value = uiState.unitFrom.convert(uiState.unitTo, BigDecimal(1))
+        .format(uiState.scale, uiState.outputFormat)
+
+    val fontStyle = MaterialTheme.typography.headlineSmall
+
+    Row(
+        modifier = modifier,
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.End,
+    ) {
+        Text(
+            1.toString(),
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.primary,
+        )
+
+        Text(
+            " ",
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        Text(
+            unitFromLabel,
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.tertiary,
+        )
+
+        Text(
+            " = ",
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        Text(
+            value,
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.primary,
+        )
+
+        Text(
+            " ",
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        Text(
+            unitToLabel,
+            style = fontStyle,
+            color = MaterialTheme.colorScheme.tertiary,
+        )
+    }
+}