feat(graphs): add markers to graphs that appear on click

#118

app/src/main/java/org/nsh07/pomodoro/ui/statsScreen/TimeColumnChart.kt

@@ -1,20 +1,34 @@
 /*
  * Copyright (c) 2025 Nishant Mishra
  *
- * You should have received a copy of the GNU General Public License
+ * This file is part of Tomato - a minimalist pomodoro timer for Android.
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * Tomato is free software: you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tomato is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tomato.
+ * If not, see <https://www.gnu.org/licenses/>.
  */
 
 package org.nsh07.pomodoro.ui.statsScreen
 
 import androidx.compose.animation.core.AnimationSpec
+import androidx.compose.foundation.layout.height
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.MaterialTheme.colorScheme
 import androidx.compose.material3.MaterialTheme.motionScheme
+import androidx.compose.material3.MaterialTheme.typography
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
@@ -37,10 +51,16 @@ import com.patrykandpatrick.vico.core.cartesian.data.CartesianChartModelProducer
 import com.patrykandpatrick.vico.core.cartesian.data.CartesianValueFormatter
 import com.patrykandpatrick.vico.core.cartesian.data.columnSeries
 import com.patrykandpatrick.vico.core.cartesian.layer.ColumnCartesianLayer
+import com.patrykandpatrick.vico.core.cartesian.marker.ColumnCartesianLayerMarkerTarget
+import com.patrykandpatrick.vico.core.cartesian.marker.DefaultCartesianMarker
 import com.patrykandpatrick.vico.core.common.Fill
+import com.patrykandpatrick.vico.core.common.Insets
+import com.patrykandpatrick.vico.core.common.component.ShapeComponent
+import com.patrykandpatrick.vico.core.common.component.TextComponent
 import com.patrykandpatrick.vico.core.common.shape.CorneredShape
 import org.nsh07.pomodoro.ui.theme.TomatoTheme
 import org.nsh07.pomodoro.utils.millisecondsToHours
+import org.nsh07.pomodoro.utils.millisecondsToHoursMinutes
 import org.nsh07.pomodoro.utils.millisecondsToMinutes
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
@@ -58,6 +78,18 @@ fun TimeColumnChart(
             millisecondsToMinutes(value.toLong())
         }
     },
+    markerValueFormatter: DefaultCartesianMarker.ValueFormatter = DefaultCartesianMarker.ValueFormatter { _, targets ->
+        val first = targets.firstOrNull()
+        val value = if (first is ColumnCartesianLayerMarkerTarget) {
+            first.columns.sumOf { it.entry.y.toLong() }
+        } else 0L
+
+        if (value >= 60 * 60 * 1000) {
+            millisecondsToHoursMinutes(value)
+        } else {
+            millisecondsToMinutes(value)
+        }
+    },
     animationSpec: AnimationSpec<Float>? = motionScheme.slowEffectsSpec()
 ) {
     ProvideVicoTheme(rememberM3VicoTheme()) {
@@ -88,6 +120,20 @@ fun TimeColumnChart(
                         guideline = rememberLineComponent(Fill.Transparent),
                         valueFormatter = xValueFormatter
                     ),
+                    marker = DefaultCartesianMarker(
+                        TextComponent(
+                            color = colorScheme.surface.toArgb(),
+                            background = ShapeComponent(
+                                fill = fill(colorScheme.onSurface),
+                                shape = CorneredShape.Pill
+                            ),
+                            textSizeSp = typography.labelSmall.fontSize.value,
+                            lineHeightSp = typography.labelSmall.fontSize.value,
+                            padding = Insets(verticalDp = 4f, horizontalDp = 8f),
+                            margins = Insets(bottomDp = 2f)
+                        ),
+                        valueFormatter = markerValueFormatter
+                    ),
                     fadingEdges = FadingEdges()
                 ),
             modelProducer = modelProducer,
@@ -97,7 +143,7 @@ fun TimeColumnChart(
                 minZoom = Zoom.min(Zoom.Content, Zoom.fixed())
             ),
             animationSpec = animationSpec,
-            modifier = modifier,
+            modifier = modifier.height(224.dp),
         )
     }
 }

app/src/main/java/org/nsh07/pomodoro/ui/statsScreen/TimeLineChart.kt

@@ -1,15 +1,28 @@
 /*
  * Copyright (c) 2025 Nishant Mishra
  *
- * You should have received a copy of the GNU General Public License
+ * This file is part of Tomato - a minimalist pomodoro timer for Android.
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * Tomato is free software: you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tomato is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tomato.
+ * If not, see <https://www.gnu.org/licenses/>.
  */
 
 package org.nsh07.pomodoro.ui.statsScreen
 
 import androidx.compose.animation.core.AnimationSpec
+import androidx.compose.foundation.layout.height
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.MaterialTheme.colorScheme
 import androidx.compose.material3.MaterialTheme.motionScheme
+import androidx.compose.material3.MaterialTheme.typography
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
@@ -41,10 +54,17 @@ import com.patrykandpatrick.vico.core.cartesian.data.CartesianValueFormatter
 import com.patrykandpatrick.vico.core.cartesian.data.lineSeries
 import com.patrykandpatrick.vico.core.cartesian.layer.LineCartesianLayer
 import com.patrykandpatrick.vico.core.cartesian.layer.LineCartesianLayer.LineFill.Companion.single
+import com.patrykandpatrick.vico.core.cartesian.marker.DefaultCartesianMarker
+import com.patrykandpatrick.vico.core.cartesian.marker.LineCartesianLayerMarkerTarget
 import com.patrykandpatrick.vico.core.common.Fill
+import com.patrykandpatrick.vico.core.common.Insets
+import com.patrykandpatrick.vico.core.common.component.ShapeComponent
+import com.patrykandpatrick.vico.core.common.component.TextComponent
 import com.patrykandpatrick.vico.core.common.shader.ShaderProvider
+import com.patrykandpatrick.vico.core.common.shape.CorneredShape
 import org.nsh07.pomodoro.ui.theme.TomatoTheme
 import org.nsh07.pomodoro.utils.millisecondsToHours
+import org.nsh07.pomodoro.utils.millisecondsToHoursMinutes
 import org.nsh07.pomodoro.utils.millisecondsToMinutes
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
@@ -62,6 +82,18 @@ fun TimeLineChart(
             millisecondsToMinutes(value.toLong())
         }
     },
+    markerValueFormatter: DefaultCartesianMarker.ValueFormatter = DefaultCartesianMarker.ValueFormatter { _, targets ->
+        val first = targets.firstOrNull()
+        val value = if (first is LineCartesianLayerMarkerTarget) {
+            first.points.sumOf { it.entry.y.toLong() }
+        } else 0L
+
+        if (value >= 60 * 60 * 1000) {
+            millisecondsToHoursMinutes(value)
+        } else {
+            millisecondsToMinutes(value)
+        }
+    },
     animationSpec: AnimationSpec<Float>? = motionScheme.slowEffectsSpec()
 ) {
     ProvideVicoTheme(rememberM3VicoTheme()) {
@@ -102,6 +134,20 @@ fun TimeLineChart(
                         guideline = rememberLineComponent(Fill.Transparent),
                         valueFormatter = xValueFormatter
                     ),
+                    marker = DefaultCartesianMarker(
+                        TextComponent(
+                            color = colorScheme.surface.toArgb(),
+                            background = ShapeComponent(
+                                fill = fill(colorScheme.onSurface),
+                                shape = CorneredShape.Pill
+                            ),
+                            textSizeSp = typography.labelSmall.fontSize.value,
+                            lineHeightSp = typography.labelSmall.fontSize.value,
+                            padding = Insets(verticalDp = 4f, horizontalDp = 8f),
+                            margins = Insets(bottomDp = 2f)
+                        ),
+                        valueFormatter = markerValueFormatter
+                    ),
                     fadingEdges = FadingEdges()
                 ),
             modelProducer = modelProducer,
@@ -111,7 +157,7 @@ fun TimeLineChart(
                 minZoom = Zoom.min(Zoom.Content, Zoom.fixed())
             ),
             animationSpec = animationSpec,
-            modifier = modifier,
+            modifier = modifier.height(224.dp),
         )
     }
 }