Add progress chart to statistics page showing score progression over time

app/build.gradle.kts

@@ -83,6 +83,9 @@ dependencies {
     implementation("androidx.navigation:navigation-fragment-ktx:2.7.6")
     implementation("androidx.navigation:navigation-ui-ktx:2.7.6")
 
+    // MPAndroidChart for progress visualization
+    implementation("com.github.PhilJay:MPAndroidChart:v3.1.0")
+
     // Room
     implementation("androidx.room:room-runtime:2.6.1")
     implementation("androidx.room:room-ktx:2.6.1")

app/src/main/java/com/accidentalproductions/tetristats/data/ScalingFactors.kt

@@ -16,7 +16,9 @@ object ScalingFactors {
             "Tetris DS" to RangeScalingFactor(3.0, 3.3, 4.5),
             "Tetris Effect" to RangeScalingFactor(2.5, 3.8, 4.5),
             "Rosy Retrospection DX" to RangeScalingFactor(4.0, 1.5, 1.8),
-            "Apotris" to RangeScalingFactor(1.8, 3.8, 4.4)
+            "Apotris" to RangeScalingFactor(1.8, 3.8, 4.4),
+            "Modretro Tetris" to RangeScalingFactor(2.0, 2.5, 3.0),
+            "Tetris Mobile" to RangeScalingFactor(2.2, 2.8, 3.5)
         ),
         "Game Boy Tetris" to mapOf(
             "NES Tetris" to 1.33,
@@ -24,7 +26,9 @@ object ScalingFactors {
             "Tetris DS" to RangeScalingFactor(4.0, 2.0, 2.0),
             "Tetris Effect" to RangeScalingFactor(4.0, 2.3, 2.3),
             "Rosy Retrospection DX" to 1.1,
-            "Apotris" to RangeScalingFactor(1.33, 1.33, 2.33)
+            "Apotris" to RangeScalingFactor(1.33, 1.33, 2.33),
+            "Modretro Tetris" to RangeScalingFactor(1.5, 1.8, 2.0),
+            "Tetris Mobile" to RangeScalingFactor(1.6, 1.9, 2.1)
         ),
         "Tetris DX" to mapOf(
             "NES Tetris" to 1.33,
@@ -32,7 +36,9 @@ object ScalingFactors {
             "Tetris DS" to RangeScalingFactor(4.0, 2.0, 2.0),
             "Tetris Effect" to RangeScalingFactor(4.0, 2.3, 2.3),
             "Rosy Retrospection DX" to 1.1,
-            "Apotris" to RangeScalingFactor(1.33, 1.33, 2.33)
+            "Apotris" to RangeScalingFactor(1.33, 1.33, 2.33),
+            "Modretro Tetris" to RangeScalingFactor(1.5, 1.8, 2.0),
+            "Tetris Mobile" to RangeScalingFactor(1.6, 1.9, 2.1)
         ),
         "Tetris DS" to mapOf(
             "NES Tetris" to RangeScalingFactor(0.33, 0.3, 0.22),
@@ -40,7 +46,9 @@ object ScalingFactors {
             "Tetris DX" to RangeScalingFactor(0.25, 0.5, 0.5),
             "Tetris Effect" to RangeScalingFactor(0.83, 0.91, 1.0),
             "Rosy Retrospection DX" to RangeScalingFactor(0.25, 0.91, 0.67),
-            "Apotris" to RangeScalingFactor(0.33, 0.67, 0.9)
+            "Apotris" to RangeScalingFactor(0.33, 0.67, 0.9),
+            "Modretro Tetris" to RangeScalingFactor(0.4, 0.5, 0.6),
+            "Tetris Mobile" to RangeScalingFactor(0.45, 0.55, 0.65)
         ),
         "Tetris Effect" to mapOf(
             "NES Tetris" to RangeScalingFactor(0.4, 0.26, 0.22),
@@ -48,7 +56,9 @@ object ScalingFactors {
             "Tetris DX" to RangeScalingFactor(0.25, 0.43, 0.43),
             "Tetris DS" to RangeScalingFactor(1.2, 1.1, 1.0),
             "Rosy Retrospection DX" to RangeScalingFactor(0.25, 0.43, 0.57),
-            "Apotris" to RangeScalingFactor(0.33, 0.67, 0.85)
+            "Apotris" to RangeScalingFactor(0.33, 0.67, 0.85),
+            "Modretro Tetris" to RangeScalingFactor(0.45, 0.55, 0.65),
+            "Tetris Mobile" to RangeScalingFactor(0.5, 0.6, 0.7)
         ),
         "Rosy Retrospection DX" to mapOf(
             "NES Tetris" to RangeScalingFactor(0.25, 0.67, 0.57),
@@ -56,7 +66,9 @@ object ScalingFactors {
             "Tetris DX" to 0.91,
             "Tetris DS" to RangeScalingFactor(4.0, 1.5, 1.8),
             "Tetris Effect" to RangeScalingFactor(4.0, 2.3, 1.8),
-            "Apotris" to RangeScalingFactor(1.1, 0.67, 0.5)
+            "Apotris" to RangeScalingFactor(1.1, 0.67, 0.5),
+            "Modretro Tetris" to RangeScalingFactor(1.3, 1.5, 1.7),
+            "Tetris Mobile" to RangeScalingFactor(1.4, 1.6, 1.8)
         ),
         "Apotris" to mapOf(
             "NES Tetris" to RangeScalingFactor(0.56, 0.26, 0.23),
@@ -64,7 +76,29 @@ object ScalingFactors {
             "Tetris DX" to RangeScalingFactor(0.75, 0.75, 0.5),
             "Tetris DS" to RangeScalingFactor(3.0, 1.5, 1.0),
             "Tetris Effect" to RangeScalingFactor(3.0, 1.7, 1.2),
-            "Rosy Retrospection DX" to RangeScalingFactor(1.1, 0.67, 0.5)
+            "Rosy Retrospection DX" to RangeScalingFactor(1.1, 0.67, 0.5),
+            "Modretro Tetris" to RangeScalingFactor(1.2, 0.9, 0.7),
+            "Tetris Mobile" to RangeScalingFactor(1.3, 1.0, 0.8)
+        ),
+        "Modretro Tetris" to mapOf(
+            "NES Tetris" to RangeScalingFactor(0.5, 0.4, 0.33),
+            "Game Boy Tetris" to RangeScalingFactor(0.67, 0.56, 0.5),
+            "Tetris DX" to RangeScalingFactor(0.67, 0.56, 0.5),
+            "Tetris DS" to RangeScalingFactor(2.5, 2.0, 1.67),
+            "Tetris Effect" to RangeScalingFactor(2.22, 1.82, 1.54),
+            "Rosy Retrospection DX" to RangeScalingFactor(0.77, 0.67, 0.59),
+            "Apotris" to RangeScalingFactor(0.83, 1.11, 1.43),
+            "Tetris Mobile" to RangeScalingFactor(1.1, 1.1, 1.1)
+        ),
+        "Tetris Mobile" to mapOf(
+            "NES Tetris" to RangeScalingFactor(0.45, 0.36, 0.29),
+            "Game Boy Tetris" to RangeScalingFactor(0.63, 0.53, 0.48),
+            "Tetris DX" to RangeScalingFactor(0.63, 0.53, 0.48),
+            "Tetris DS" to RangeScalingFactor(2.22, 1.82, 1.54),
+            "Tetris Effect" to RangeScalingFactor(2.0, 1.67, 1.43),
+            "Rosy Retrospection DX" to RangeScalingFactor(0.71, 0.63, 0.56),
+            "Apotris" to RangeScalingFactor(0.77, 1.0, 1.25),
+            "Modretro Tetris" to RangeScalingFactor(0.91, 0.91, 0.91)
         )
     )
 

app/src/main/java/com/accidentalproductions/tetristats/data/ScoreDao.kt

@@ -12,6 +12,9 @@ interface ScoreDao {
     @Query("SELECT * FROM scores WHERE gameVersion = :gameVersion")
     fun getScoresForGame(gameVersion: String): LiveData<List<Score>>
 
+    @Query("SELECT * FROM scores WHERE gameVersion = :gameVersion ORDER BY dateRecorded ASC")
+    fun getScoresForGameByDate(gameVersion: String): LiveData<List<Score>>
+
     @Query("SELECT DISTINCT gameVersion FROM scores")
     fun getGamesWithScores(): LiveData<List<String>>
 

app/src/main/java/com/accidentalproductions/tetristats/ui/entry/EntryFragment.kt

@@ -17,6 +17,9 @@ class EntryFragment : Fragment() {
     private val binding get() = _binding!!
     private val viewModel: EntryViewModel by viewModels { EntryViewModelFactory(requireActivity().application) }
     private lateinit var equivalentScoreAdapter: EquivalentScoreAdapter
+    
+    // Flag to track if we already showed the requirements toast
+    private var hasShownRequirementsToast = false
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -34,9 +37,71 @@ class EntryFragment : Fragment() {
         setupRecyclerView()
         setupSubmitButton()
         setupAutoAnalysis()
+    }
+    
+    override fun onResume() {
+        super.onResume()
+        // Refresh conversions when returning to this fragment
+        refreshConversions()
+    }
+    
+    /**
+     * Force refresh the conversions using the last submitted values
+     */
+    private fun refreshConversions() {
+        if (viewModel.showConversion.value == true) {
+            // If we have last submitted values, regenerate conversions
+            val game = viewModel.lastSubmittedGame.value
+            val score = viewModel.lastSubmittedScore.value
+            
+            if (game != null && score != null) {
+                viewModel.refreshEquivalentScores(game, score)
+                
+                // Make sure UI updates immediately by forcing an adapter refresh
+                viewModel.equivalentScores.value?.let { scores ->
+                    equivalentScoreAdapter.submitList(null)  // Clear first
+                    equivalentScoreAdapter.submitList(scores)  // Then add new list
+                }
+                
+                // Ensure card is visible
+                updateAnalysisCard()
+            }
+        }
+    }
+    
+    /**
+     * Update the analysis card visibility and contents based on current state
+     */
+    private fun updateAnalysisCard() {
+        if (viewModel.showConversion.value != true) {
+            binding.cardAnalysisResults.visibility = View.GONE
+            return
+        }
         
-        // Check if we should show conversions on startup
-        viewModel.checkConversionCriteria()
+        val game = viewModel.lastSubmittedGame.value
+        val score = viewModel.lastSubmittedScore.value
+        
+        if (game != null && score != null) {
+            // Get the list of games with scores
+            val playedGames = viewModel.gamesWithScores.value ?: listOf()
+            
+            // Make sure we don't show the source game in the equivalent dropdown
+            val filteredGames = playedGames.filter { it != game }
+            if (filteredGames.isNotEmpty()) {
+                binding.textViewOriginalScore.text = "Your $game score of ${"%,d".format(score)} is equivalent to:"
+                binding.cardAnalysisResults.visibility = View.VISIBLE
+                
+                val filteredAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_dropdown_item_1line, filteredGames)
+                binding.autoCompleteEquivalentGame.setAdapter(filteredAdapter)
+                
+                // Select first game by default
+                binding.autoCompleteEquivalentGame.setText(filteredGames[0], false)
+                viewModel.setSelectedEquivalentGame(filteredGames[0])
+            } else {
+                // If no other games to convert to, hide the card
+                binding.cardAnalysisResults.visibility = View.GONE
+            }
+        }
     }
 
     private fun setupGameVersionDropdown() {
@@ -47,7 +112,9 @@ class EntryFragment : Fragment() {
             "Tetris DS",
             "Tetris Effect",
             "Rosy Retrospection DX",
-            "Apotris"
+            "Apotris",
+            "Modretro Tetris",
+            "Tetris Mobile"
         )
         val adapter = ArrayAdapter(requireContext(), android.R.layout.simple_dropdown_item_1line, games)
         binding.autoCompleteGameVersion.setAdapter(adapter)
@@ -67,18 +134,12 @@ class EntryFragment : Fragment() {
         
         // Observe if we should show conversions
         viewModel.showConversion.observe(viewLifecycleOwner) { shouldShow ->
-            if (!shouldShow) {
-                // Hide analysis card if we don't meet criteria
+            // No need to show toast here - we'll do it only after score submission
+            if (shouldShow) {
+                // Update card when showConversion changes
+                updateAnalysisCard()
+            } else {
                 binding.cardAnalysisResults.visibility = View.GONE
-                
-                // Also show a message that not enough scores have been entered
-                if (viewModel.lastSubmittedGame.value != null) {
-                    Toast.makeText(
-                        context,
-                        "Enter at least 3 scores across 2 different games to see conversions",
-                        Toast.LENGTH_LONG
-                    ).show()
-                }
             }
         }
         
@@ -86,8 +147,8 @@ class EntryFragment : Fragment() {
         viewModel.gamesWithScores.observe(viewLifecycleOwner) { games ->
             // Setup the game dropdown for adding equivalents - only with played games
             if (games.isNotEmpty()) {
-                val adapter = ArrayAdapter(requireContext(), android.R.layout.simple_dropdown_item_1line, games)
-                binding.autoCompleteEquivalentGame.setAdapter(adapter)
+                // Update card when games list changes
+                updateAnalysisCard()
             }
         }
         
@@ -110,41 +171,22 @@ class EntryFragment : Fragment() {
         }
         
         // Observe last submitted score details
-        viewModel.lastSubmittedGame.observe(viewLifecycleOwner) { game ->
-            // Only continue if showConversion is true
-            if (viewModel.showConversion.value != true) return@observe
-            
-            viewModel.lastSubmittedScore.value?.let { score ->
-                binding.textViewOriginalScore.text = "Your $game score of ${"%,d".format(score)} is equivalent to:"
-                binding.cardAnalysisResults.visibility = View.VISIBLE
-                
-                // Get the list of games with scores
-                val playedGames = viewModel.gamesWithScores.value ?: listOf()
-                
-                // Make sure we don't show the source game in the equivalent dropdown
-                val filteredGames = playedGames.filter { it != game }
-                if (filteredGames.isNotEmpty()) {
-                    val filteredAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_dropdown_item_1line, filteredGames)
-                    binding.autoCompleteEquivalentGame.setAdapter(filteredAdapter)
-                    
-                    // Select first game by default
-                    binding.autoCompleteEquivalentGame.setText(filteredGames[0], false)
-                    viewModel.setSelectedEquivalentGame(filteredGames[0])
-                } else {
-                    // If no other games to convert to, hide the card
-                    binding.cardAnalysisResults.visibility = View.GONE
-                    Toast.makeText(
-                        context,
-                        "Add scores for other games to see conversions",
-                        Toast.LENGTH_LONG
-                    ).show()
-                }
-            }
+        viewModel.lastSubmittedGame.observe(viewLifecycleOwner) { _ ->
+            // Update the analysis card when last submitted game changes
+            updateAnalysisCard()
+        }
+        
+        // Observe last submitted score value
+        viewModel.lastSubmittedScore.observe(viewLifecycleOwner) { _ ->
+            // Update the analysis card when score changes
+            updateAnalysisCard()
         }
         
         // Observe equivalent scores
         viewModel.equivalentScores.observe(viewLifecycleOwner) { scores ->
             if (scores.isNotEmpty()) {
+                // Force a clean update by clearing first
+                equivalentScoreAdapter.submitList(null)
                 equivalentScoreAdapter.submitList(scores)
             } else if (viewModel.showConversion.value == true) {
                 // If we should be showing conversions but have no scores, probably no other games
@@ -171,8 +213,17 @@ class EntryFragment : Fragment() {
                 )
                 clearInputs()
                 
-                // Only scroll down if we're going to show conversions
-                if (viewModel.showConversion.value == true) {
+                // Force immediate refresh of conversions
+                if (viewModel.showConversion.value == false) {
+                    Toast.makeText(
+                        context,
+                        "Enter at least 3 scores across 2 different games to see conversions",
+                        Toast.LENGTH_LONG
+                    ).show()
+                } else {
+                    refreshConversions()
+                    
+                    // Scroll down to show the analysis results
                     binding.root.post {
                         binding.root.fullScroll(View.FOCUS_DOWN)
                     }

app/src/main/java/com/accidentalproductions/tetristats/ui/entry/EntryViewModel.kt

@@ -1,6 +1,7 @@
 package com.accidentalproductions.tetristats.ui.entry
 
 import android.app.Application
+import android.util.Log
 import androidx.lifecycle.*
 import com.accidentalproductions.tetristats.TetriStatsApplication
 import com.accidentalproductions.tetristats.data.Score
@@ -22,7 +23,9 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
         "Tetris DS",
         "Tetris Effect",
         "Rosy Retrospection DX",
-        "Apotris"
+        "Apotris",
+        "Modretro Tetris",
+        "Tetris Mobile"
     )
     
     // Track user played games and score counts
@@ -42,6 +45,17 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
     val lastSubmittedGame: LiveData<String> = _lastSubmittedGame
     val lastSubmittedScore: LiveData<Int> = _lastSubmittedScore
     val showConversion: LiveData<Boolean> = _showConversion
+    
+    init {
+        // Set up observers to update conversion criteria whenever relevant data changes
+        gamesWithScores.observeForever { 
+            checkConversionCriteria() 
+        }
+        
+        totalScoreCount.observeForever {
+            checkConversionCriteria()
+        }
+    }
 
     fun getScoresForGame(gameVersion: String): LiveData<List<Score>> {
         return scoreDao.getScoresForGame(gameVersion)
@@ -55,12 +69,26 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
      * Check if we should show conversions based on score count and game count
      */
     fun checkConversionCriteria() {
-        viewModelScope.launch {
-            val scoreCount = totalScoreCount.value ?: 0
-            val gameCount = gamesWithScores.value?.size ?: 0
-            
-            // Only show conversions if there are at least 3 scores across at least 2 games
-            _showConversion.postValue(scoreCount >= 3 && gameCount >= 2)
+        val scoreCount = totalScoreCount.value ?: 0
+        val gameCount = gamesWithScores.value?.size ?: 0
+        
+        // Only show conversions if there are at least 3 scores across at least 2 games
+        val shouldShow = scoreCount >= 3 && gameCount >= 2
+        
+        // For debugging
+        Log.d("TetriStats", "Checking conversion criteria: scores=$scoreCount, games=$gameCount, shouldShow=$shouldShow")
+        
+        _showConversion.postValue(shouldShow)
+    }
+    
+    /**
+     * Force refresh the equivalent scores - use this to ensure UI has latest values
+     */
+    fun refreshEquivalentScores(fromGame: String, score: Int) {
+        // Only refresh if conversions should be showing
+        if (_showConversion.value == true) {
+            Log.d("TetriStats", "Refreshing equivalent scores for $fromGame score $score")
+            generateEquivalentScores(fromGame, score)
         }
     }
 
@@ -82,14 +110,14 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
             scoreDao.insert(newScore)
             
             // After inserting, update the last submitted values
-            _lastSubmittedGame.postValue(gameVersion)
-            _lastSubmittedScore.postValue(score)
+            _lastSubmittedGame.value = gameVersion  // Use immediate value change instead of postValue
+            _lastSubmittedScore.value = score      // Use immediate value change instead of postValue
             
-            // Check if we should show conversions
+            // Immediately check conversion criteria with current values
             checkConversionCriteria()
             
-            // Only generate equivalent scores if we meet the criteria
-            if (_showConversion.value == true) {
+            // Immediate refresh regardless if we just reached the criteria threshold
+            if (totalScoreCount.value ?: 0 >= 3 && (gamesWithScores.value?.size ?: 0) >= 2) {
                 generateEquivalentScores(gameVersion, score)
             }
         }
@@ -121,7 +149,8 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
         
-        _equivalentScores.postValue(equivalents)
+        // Use setValue for immediate update on main thread rather than postValue
+        _equivalentScores.value = equivalents
     }
     
     /**
@@ -141,6 +170,13 @@ class EntryViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
+    
+    override fun onCleared() {
+        super.onCleared()
+        // Remove our observers to prevent leaks
+        gamesWithScores.removeObserver { checkConversionCriteria() }
+        totalScoreCount.removeObserver { checkConversionCriteria() }
+    }
 }
 
 class EntryViewModelFactory(private val application: Application) : ViewModelProvider.Factory {

app/src/main/java/com/accidentalproductions/tetristats/ui/stats/StatsFragment.kt

@@ -1,5 +1,6 @@
 package com.accidentalproductions.tetristats.ui.stats
 
+import android.graphics.Color
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -8,7 +9,16 @@ import android.widget.ArrayAdapter
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.recyclerview.widget.LinearLayoutManager
+import com.accidentalproductions.tetristats.R
 import com.accidentalproductions.tetristats.databinding.FragmentStatsBinding
+import com.github.mikephil.charting.components.XAxis
+import com.github.mikephil.charting.data.Entry
+import com.github.mikephil.charting.data.LineData
+import com.github.mikephil.charting.data.LineDataSet
+import com.github.mikephil.charting.formatter.ValueFormatter
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
 
 class StatsFragment : Fragment() {
     private var _binding: FragmentStatsBinding? = null
@@ -30,6 +40,7 @@ class StatsFragment : Fragment() {
 
         setupRecyclerView()
         setupGameFilter()
+        setupProgressChart()
         observeStats()
     }
 
@@ -52,6 +63,64 @@ class StatsFragment : Fragment() {
             viewModel.setSelectedGame(selectedGame)
         }
     }
+    
+    private fun setupProgressChart() {
+        with(binding.chartProgress) {
+            description.isEnabled = false
+            legend.isEnabled = true
+            setTouchEnabled(true)
+            setDrawGridBackground(false)
+            isDragEnabled = true
+            setScaleEnabled(true)
+            setPinchZoom(true)
+            
+            axisRight.isEnabled = false
+            
+            xAxis.position = XAxis.XAxisPosition.BOTTOM
+            xAxis.granularity = 1f
+            xAxis.setDrawGridLines(false)
+            
+            axisLeft.setDrawGridLines(true)
+            axisLeft.axisMinimum = 0f
+        }
+    }
+
+    private fun updateProgressChart(scores: List<Entry>, dates: List<Long>) {
+        if (scores.isEmpty()) {
+            binding.chartProgress.clear()
+            binding.chartProgress.invalidate()
+            return
+        }
+        
+        val dataSet = LineDataSet(scores, "Score Progress").apply {
+            mode = LineDataSet.Mode.CUBIC_BEZIER
+            color = resources.getColor(R.color.tetris_navy, null)
+            lineWidth = 2f
+            setDrawCircles(true)
+            setCircleColor(resources.getColor(R.color.tetris_navy, null))
+            circleRadius = 4f
+            setDrawValues(false)
+            highLightColor = Color.rgb(244, 117, 117)
+        }
+        
+        val lineData = LineData(dataSet)
+        binding.chartProgress.data = lineData
+        
+        // Format X-axis labels (dates)
+        val dateFormat = SimpleDateFormat("MM/dd", Locale.getDefault())
+        binding.chartProgress.xAxis.valueFormatter = object : ValueFormatter() {
+            override fun getFormattedValue(value: Float): String {
+                val index = value.toInt()
+                return if (index >= 0 && index < dates.size) {
+                    dateFormat.format(Date(dates[index]))
+                } else {
+                    ""
+                }
+            }
+        }
+        
+        binding.chartProgress.invalidate()
+    }
 
     private fun observeStats() {
         viewModel.filteredScores.observe(viewLifecycleOwner) { scores ->
@@ -65,6 +134,24 @@ class StatsFragment : Fragment() {
         viewModel.highScore.observe(viewLifecycleOwner) { highScore ->
             binding.textViewHighScore.text = "%,d".format(highScore)
         }
+        
+        viewModel.scoresByDate.observe(viewLifecycleOwner) { scores ->
+            // Convert scores to entries for the chart
+            if (scores.isNotEmpty()) {
+                val entries = mutableListOf<Entry>()
+                val dates = mutableListOf<Long>()
+                
+                scores.forEachIndexed { index, score ->
+                    entries.add(Entry(index.toFloat(), score.scoreValue.toFloat()))
+                    dates.add(score.dateRecorded)
+                }
+                
+                updateProgressChart(entries, dates)
+            } else {
+                binding.chartProgress.clear()
+                binding.chartProgress.invalidate()
+            }
+        }
     }
 
     override fun onDestroyView() {

app/src/main/java/com/accidentalproductions/tetristats/ui/stats/StatsViewModel.kt

@@ -18,6 +18,10 @@ class StatsViewModel(application: Application) : AndroidViewModel(application) {
         scoreDao.getScoresForGame(game)
     }
 
+    val scoresByDate: LiveData<List<Score>> = _selectedGame.switchMap { game ->
+        scoreDao.getScoresForGameByDate(game)
+    }
+
     val averageScore: LiveData<Double> = _selectedGame.switchMap { game ->
         scoreDao.getAverageScore(game)
     }

app/src/main/res/layout/fragment_stats.xml

@@ -31,6 +31,33 @@
                 android:inputType="none"/>
         </com.google.android.material.textfield.TextInputLayout>
 
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            app:cardCornerRadius="8dp"
+            app:cardElevation="4dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Progress Chart"
+                    android:textAppearance="?attr/textAppearanceSubtitle1" />
+
+                <com.github.mikephil.charting.charts.LineChart
+                    android:id="@+id/chartProgress"
+                    android:layout_width="match_parent"
+                    android:layout_height="200dp"
+                    android:layout_marginTop="8dp" />
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/recyclerViewScores"
             android:layout_width="match_parent"