feat: Continue work on Chart

LICENSE

@@ -1,21 +1,661 @@
-MIT License
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
 
-Copyright (c) 2022 Florian Bouillon
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

app/build.gradle

@@ -142,8 +142,8 @@ dependencies {
     implementation 'com.github.HackPlan:AndroidCharts:1.0.4'
 
     // Hilt
-    implementation 'com.google.dagger:hilt-android:2.42'
+    implementation 'com.google.dagger:hilt-android:2.43'
-    kapt 'com.google.dagger:hilt-compiler:2.42'
+    kapt 'com.google.dagger:hilt-compiler:2.43'
 
     // Google Fit
     implementation "com.google.android.gms:play-services-fitness:21.1.0"

app/src/main/AndroidManifest.xml

@@ -46,7 +46,7 @@
 
         <!-- Activity for error handling -->
         <activity android:name=".ui.ErrorActivity"
-            android:theme="@style/Theme.OpenHealth.NoActionBar"
+            android:theme="@style/Theme.OpenHealth"
         android:exported="false" />
 
         <service

app/src/main/java/com/dzeio/openhealth/ui/MainActivity.kt

@@ -5,12 +5,14 @@ import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.content.Context
 import android.content.Intent
+import android.content.res.Configuration
 import android.os.Build
 import android.os.Bundle
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuItem
+import androidx.core.view.WindowCompat
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
@@ -25,6 +27,7 @@ import com.dzeio.openhealth.databinding.ActivityMainBinding
 import com.dzeio.openhealth.interfaces.NotificationChannels
 import com.dzeio.openhealth.services.OpenHealthService
 import com.dzeio.openhealth.workers.WaterReminderWorker
+import com.google.android.material.color.MaterialColors
 import dagger.hilt.android.AndroidEntryPoint
 
 @AndroidEntryPoint
@@ -52,6 +55,30 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
 
         setSupportActionBar(binding.toolbar)
 
+        window.navigationBarColor = MaterialColors.getColor(
+            window.decorView,
+            com.google.android.material.R.attr.colorSecondaryContainer
+        )
+        window.statusBarColor = MaterialColors.getColor(
+            window.decorView,
+            com.google.android.material.R.attr.colorSecondaryContainer
+        )
+
+        when (this.resources.configuration.uiMode.and(Configuration.UI_MODE_NIGHT_MASK)) {
+            Configuration.UI_MODE_NIGHT_YES -> {
+                WindowCompat.getInsetsController(window, window.decorView).apply {
+                    isAppearanceLightNavigationBars = true
+                    isAppearanceLightStatusBars = false
+                }
+            }
+            Configuration.UI_MODE_NIGHT_NO, Configuration.UI_MODE_NIGHT_UNDEFINED -> {
+                WindowCompat.getInsetsController(window, window.decorView).apply {
+                    isAppearanceLightNavigationBars = false
+                    isAppearanceLightStatusBars = true
+                }
+            }
+        }
+
         val navHostFragment =
             supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
 

app/src/main/java/com/dzeio/openhealth/ui/steps/StepsHomeFragment.kt

@@ -4,12 +4,10 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.core.widget.NestedScrollView
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.dzeio.charts.Entry
 import com.dzeio.charts.series.BarSerie
 import com.dzeio.openhealth.Application
-import com.dzeio.openhealth.R
 import com.dzeio.openhealth.adapters.StepsAdapter
 import com.dzeio.openhealth.core.BaseFragment
 import com.dzeio.openhealth.databinding.FragmentStepsHomeBinding
@@ -59,24 +57,44 @@ class StepsHomeFragment :
         viewModel.items.observe(viewLifecycleOwner) { list ->
             adapter.set(list)
 
-            chart.debug = true
+//            chart.debug = true
 
             chart.xAxis.entriesDisplayed = 10
 //            chart.numberOfLabels = 2
 
 //            chart.animation.enabled = false
             chart.animation.refreshRate = 60
-            chart.animation.duration = 500
+            chart.animation.duration = 300
+
+            chart.scroller.zoomEnabled = false
 
             chart.xAxis.labels.color = MaterialColors.getColor(
                 requireView(),
                 com.google.android.material.R.attr.colorOnBackground
             )
+
             chart.xAxis.labels.size = 32f
-            chart.yAxis.color = MaterialColors.getColor(
+            chart.yAxis.apply {
-                requireView(),
+                color = MaterialColors.getColor(
-                com.google.android.material.R.attr.colorPrimary
+                    requireView(),
-            )
+                    com.google.android.material.R.attr.colorPrimary
+                )
+                textPaint.color = MaterialColors.getColor(
+                    requireView(),
+                    com.google.android.material.R.attr.colorOnBackground
+                )
+                linePaint.color = MaterialColors.getColor(
+                    requireView(),
+                    com.google.android.material.R.attr.colorOutline
+                )
+                onValueFormat = onValueFormat@{ value, short ->
+                    if (short) {
+                        return@onValueFormat value.toInt().toString()
+                    } else {
+                        return@onValueFormat "${value.toInt()} steps"
+                    }
+                }
+            }
 
             serie.datas = list.reversed().map {
                 return@map Entry(it.timestamp.toDouble(), it.value.toFloat())
@@ -95,5 +113,21 @@ class StepsHomeFragment :
 
             chart.refresh()
         }
+
+//        val scrollView = requireActivity().findViewById<NestedScrollView>(R.id.scrollView)
+//        var scrollEnabled = false
+//        scrollView.setOnTouchListener { view, _ ->
+//            view.performClick()
+//            if (scrollEnabled) {
+//            } else {
+//                return@setOnTouchListener !scrollEnabled
+//            }
+//            return@setOnTouchListener true
+//        }
+
+//        binding.chart.setOnToggleScroll {
+//            Log.d(TAG, it.toString())
+//            scrollEnabled = it
+//        }
     }
 }

app/src/main/res/drawable/layer_list_splash_screen.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
-<!--    <item android:drawable="?colorPrimary" />-->
+    <item android:drawable="?attr/backgroundColor"  />
     <item
         android:width="133dp"
         android:gravity="center">

app/src/main/res/drawable/vector_logo_background.xml

@@ -4,8 +4,8 @@
     android:height="512dp"
     android:viewportWidth="512"
     android:viewportHeight="512"
-    android:tint="#FFFFFF">
+    android:tint="?attr/backgroundColor">
     <path
         android:pathData="M0,0h512v512h-512z"
-        android:fillColor="#FF000000"/>
+        android:tint="#FF000000"/>
 </vector>

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

@@ -65,12 +65,4 @@
         app:layout_constraintRight_toRightOf="parent"
         app:menu="@menu/bottom_menu" />
 
-    <androidx.constraintlayout.widget.Guideline
-        android:id="@+id/guideline2"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:orientation="vertical"
-        app:layout_constraintGuide_begin="20dp" />
-
-
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values-night/themes.xml

@@ -1,17 +1,3 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
+<resources>
-    <!-- Base application theme. -->
+    <style name="Theme.OpenHealth" parent="Theme.Material3.DynamicColors.DayNight" />
-    <style name="Theme.OpenHealth" parent="Theme.Material3.DynamicColors.DayNight">
-<!--        &lt;!&ndash; Primary brand color. &ndash;&gt;-->
-<!--        <item name="colorPrimary">@color/purple_200</item>-->
-<!--        <item name="colorPrimaryVariant">@color/purple_700</item>-->
-<!--        <item name="colorOnPrimary">@color/black</item>-->
-<!--        &lt;!&ndash; Secondary brand color. &ndash;&gt;-->
-<!--        <item name="colorSecondary">@color/teal_200</item>-->
-<!--        <item name="colorSecondaryVariant">@color/teal_200</item>-->
-<!--        <item name="colorOnSecondary">@color/black</item>-->
-<!--        &lt;!&ndash; Status bar color. &ndash;&gt;-->
-<!--        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>-->
-<!--        &lt;!&ndash; Customize your theme here. &ndash;&gt;-->
-
-    </style>
 </resources>

app/src/main/res/values/themes.xml

@@ -1,10 +1,13 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
+<resources>
 
-    <style name="Theme.OpenHealth" parent="Theme.Material3.DayNight.NoActionBar" />
+    <style name="Theme.OpenHealth" parent="Theme.Material3.DayNight.NoActionBar">
+        <item name="android:navigationBarColor">@android:color/transparent</item>
+    </style>
 
     <style name="Theme.OpenHealth.NoActionBar" parent="Theme.OpenHealth">
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
     </style>
 
     <style name="ShapeAppearance.OpenHealth.Corner.Medium" parent="">

charts/build.gradle

@@ -7,25 +7,49 @@ android {
     compileSdk 32
 
     defaultConfig {
+        // Android 5 Lollipop
         minSdk 21
+
+        // Android 12
         targetSdk 32
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        consumerProguardFiles "consumer-rules.pro"
+
+        // Languages
+        def locales = ["en", "fr"]
+
+        buildConfigField "String[]", "LOCALES", "new String[]{\""+locales.join("\",\"")+"\"}"
+        resConfigs locales
     }
 
     buildTypes {
+
         release {
-            minifyEnabled false
+            // Slimmer version
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
+
+        debug {
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            debuggable true
+
+            // make it debuggable
+            renderscriptDebuggable true
+
+            // Optimization Level
+            renderscriptOptimLevel 0
+        }
     }
+
+    // Compile using JAVA 8
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_6
+        targetCompatibility JavaVersion.VERSION_1_8
     }
+
     kotlinOptions {
-        jvmTarget = '1.6'
+        jvmTarget = '1.8'
     }
 }
 

charts/src/main/java/com/dzeio/charts/ChartView.kt

@@ -27,7 +27,7 @@ class ChartView @JvmOverloads constructor(context: Context?, attrs: AttributeSet
 
     val xAxis = XAxis<Float>()
 
-    val yAxis = YAxis<Float>()
+    val yAxis = YAxis<Float>(this)
 
     val animation = Animation()
 
@@ -90,7 +90,7 @@ class ChartView @JvmOverloads constructor(context: Context?, attrs: AttributeSet
         rectF.set(
             padding,
             padding,
-            measuredWidth - padding - yAxis.getWidth(longestSerie().toFloat()) - padding,
+            measuredWidth - padding - yAxis.getWidth() - padding,
             height - padding
         )
 
@@ -104,16 +104,21 @@ class ChartView @JvmOverloads constructor(context: Context?, attrs: AttributeSet
     }
 
     override fun onDraw(canvas: Canvas) {
+
+        if (yAxis.legendEnabled) {
+            yAxis.display(canvas, measuredWidth, height)
+        }
+
         for (serie in series) {
             serie.displayData(canvas, rectF)
         }
-        canvas.drawRect(
+//        canvas.drawRect(
-            measuredWidth - padding - yAxis.getWidth(longestSerie().toFloat()),
+//            measuredWidth - padding - yAxis.getWidth(),
-            0f,
+//            0f,
-            measuredWidth - padding,
+//            measuredWidth - padding,
-            height - padding,
+//            height - padding,
-            fgPaint
+//            fgPaint
-        )
+//        )
         super.onDraw(canvas)
     }
 
@@ -133,7 +138,7 @@ class ChartView @JvmOverloads constructor(context: Context?, attrs: AttributeSet
 //        )
         return min(
             max(0f, xAxis.baseOffset + movementOffset).toInt(),
-            longestSerie() - getDisplayedEntries()
+            max(0, getCalculatedMax() - getDisplayedEntries())
         )
     }
 
@@ -142,11 +147,20 @@ class ChartView @JvmOverloads constructor(context: Context?, attrs: AttributeSet
         return max(0, xAxis.entriesDisplayed + ((zoom - 100) * 10).toInt())
     }
 
-    private fun longestSerie(): Int {
+    fun getCalculatedMax(): Int {
         var size = 0
         for (serie in series) {
             if (serie.datas.size > size) size = serie.datas.size
         }
         return size
     }
+
+    fun getXMax(displayedOnly: Boolean = false): Float {
+        var max = 0f
+        for (serie in series) {
+            val res = serie.getYMax(displayedOnly)
+            if (max < res) max = res
+        }
+        return max
+    }
 }

charts/src/main/java/com/dzeio/charts/XAxisLabels.kt

@@ -16,6 +16,7 @@ class XAxisLabels {
             it.isAntiAlias = true
             it.color = color
             it.textSize = size
+            it.isFakeBoldText = true
             it.textAlign = Paint.Align.CENTER
         }
     }

charts/src/main/java/com/dzeio/charts/axis/YAxis.kt

@@ -1,30 +1,74 @@
 package com.dzeio.charts.axis
 
+import android.graphics.Canvas
 import android.graphics.Color
 import android.graphics.Paint
 import android.graphics.Rect
 import androidx.annotation.ColorInt
+import com.dzeio.charts.ChartView
+import com.dzeio.charts.utils.drawDottedLine
 
-class YAxis<T> {
+class YAxis<T>(
+    private val chartView: ChartView
+) {
     var max: T? = null
     var min: T? = null
 
+    /**
+     * Number of labels displayed on the sidebar
+     */
+    var labelCount: Int = 4
+
     @ColorInt
     var color = Color.parseColor("#FC496D")
 
-    var paint: Paint = Paint().also {
+    var textPaint: Paint = Paint().also {
         it.isAntiAlias = true
         it.color = color
         it.textSize = 30f
-        it.textAlign = Paint.Align.CENTER
+        it.textAlign = Paint.Align.RIGHT
+    }
+
+    var linePaint = Paint().apply {
+        isAntiAlias = true
     }
 
     var legendEnabled = true
 
     private val rect: Rect = Rect()
 
-    fun getWidth(max: Float): Int {
+    fun getWidth(): Int {
-        paint.getTextBounds(max.toString(), 0, max.toString().length, rect)
+        var maxWidth = 0
-        return rect.width()
+        val max = chartView.getXMax(true)
+        val vIncrement = max / labelCount
+        for (i in 0 until labelCount) {
+            val text = onValueFormat(vIncrement * (labelCount - i), true)
+            textPaint.getTextBounds(text, 0, text.length, rect)
+            if (rect.width() > maxWidth) maxWidth = rect.width()
+        }
+        return maxWidth + chartView.padding.toInt()
     }
+
+    /**
+     * Function to display the YAxis sidebar on the right
+     *
+     * it migh also display content over the Graph
+     */
+    fun display(canvas: Canvas, width: Int, height: Int) {
+        val max = chartView.getXMax(true)
+        val increment = (height - chartView.padding * 2) / labelCount
+        val vIncrement = max / labelCount
+        for (i in 0 until labelCount) {
+            val text = onValueFormat(vIncrement * (labelCount - i), true)
+            textPaint.getTextBounds(text, 0, text.length, rect)
+            val posY = increment * i.toFloat()
+            canvas.drawDottedLine(0f, posY + chartView.padding, width - rect.width().toFloat() - chartView.padding, posY, 40f, linePaint)
+            canvas.drawText(text,
+                width.toFloat() - chartView.padding, posY + chartView.padding, textPaint)
+//            canvas.drawDottedLine(0f, posY, measuredWidth.toFloat(), posY, 10f, linePaint)
+        }
+    }
+
+    var onValueFormat: (value: Float, shortVersion: Boolean) -> String = { it, _ -> it.toString() }
+
 }

charts/src/main/java/com/dzeio/charts/components/ChartScroll.kt

@@ -7,6 +7,16 @@ import android.view.View
 
 class ChartScroll(view: View) {
 
+    /**
+     * Enabled the zoom/unzoom of datas
+     */
+    var zoomEnabled = true
+
+    /**
+     * Enable the horizontal scroll feature
+     */
+    var scrollEnabled = true
+
     // The ‘active pointer’ is the one currently moving our object.
     private var activePointerId = INVALID_POINTER_ID
 
@@ -60,7 +70,10 @@ class ChartScroll(view: View) {
      * Code mostly stolen from https://developer.android.com/training/gestures/scale#drag
      */
     fun onTouchEvent(ev: MotionEvent): Boolean {
-        scaleGestureDetector.onTouchEvent(ev)
+
+        if (zoomEnabled) {
+            scaleGestureDetector.onTouchEvent(ev)
+        }
 
         when (ev.actionMasked) {
             MotionEvent.ACTION_DOWN -> {
@@ -86,7 +99,9 @@ class ChartScroll(view: View) {
                 posX += x - lastTouchX
                 posY += y - lastTouchY
 
-                onChartMoved?.invoke(-posX, posY)
+                if (scrollEnabled) {
+                    onChartMoved?.invoke(-posX, posY)
+                }
 
                 // Remember this touch position for the next move event
                 lastTouchX = x

charts/src/main/java/com/dzeio/charts/components/Sidebar.kt

@@ -1,15 +0,0 @@
-package com.dzeio.charts.components
-
-import android.graphics.RectF
-
-class Sidebar {
-
-    var enabled = true
-
-    private val rect: RectF = RectF()
-
-    fun refresh(max: Float) {
-
-    }
-
-}

charts/src/main/java/com/dzeio/charts/series/BarSerie.kt

@@ -2,6 +2,7 @@ package com.dzeio.charts.series
 
 import android.graphics.Canvas
 import android.graphics.Paint
+import android.graphics.Rect
 import android.graphics.RectF
 import android.util.Log
 import kotlin.math.max
@@ -23,6 +24,8 @@ class BarSerie : SerieAbstract() {
 
     var previousRefresh = 0
 
+    private val r = Rect()
+
     override fun onUpdate(): Boolean {
         var needNewFrame = false
         for (i in targetPercentList.indices) {
@@ -31,7 +34,7 @@ class BarSerie : SerieAbstract() {
                 targetPercentList[i],
                 percentList[i],
                 0f,
-                0.01f
+                0.00f
             )
 
             if (value != percentList[i]) {
@@ -113,27 +116,33 @@ class BarSerie : SerieAbstract() {
     }
 
     override fun displayData(canvas: Canvas, rect: RectF) {
-        val barWidth = rect.width() / view.getDisplayedEntries() - spacing
+        val barWidth = (rect.width() - view.padding * 2) / view.getDisplayedEntries() - spacing
 
         if (percentList.isNotEmpty()) {
             // draw each rectangles
             for (i in 1..percentList.size) {
 //                Log.d(TAG, percentList[i - 1].toString())
-                val left = rect.left + spacing * i + barWidth * (i - 1).toFloat()
+                val left = rect.left + spacing * i + barWidth * (i - 1).toFloat() + view.padding
 //                Log.d(TAG, "$spacing, $i, $barWidth = $left")
                 val right = rect.left + (spacing + barWidth) * i.toFloat()
-                val bottom = rect.top + rect.height()
+                val bottom = rect.top + rect.height() - view.padding
-                val top = (bottom - rect.top) * percentList[i - 1]
+                val top = (bottom - rect.top) * percentList[i - 1] + view.padding
 
                 // create rounded rect
                 canvas.drawRoundRect(left, top, right, bottom, 8f, 8f, fgPaint)
                 // remove the bottom corners DUH
                 canvas.drawRect(left, max(top, bottom - 8f), right, bottom, fgPaint)
-                if (view.debug) {
+                val targetTop = (bottom - rect.top) * targetPercentList[i - 1]
+
+                val text = view.yAxis.onValueFormat(getMax() - getMax() * targetPercentList[i - 1], true)
+                view.xAxis.labels.build().getTextBounds(text, 0, text.length, r)
+                val doDisplayIn = r.width() + 10f < barWidth && bottom - targetTop > r.height() + 40f
+                if (view.debug || !doDisplayIn || (doDisplayIn && bottom - top > r.height() + 40f)) {
+                    val y = if (doDisplayIn) top + r.height() + 20f else top - r.height()
                     canvas.drawText(
-                        (getMax() - getMax() * targetPercentList[i - 1]).toString(),
+                        text,
                         left + (right - left) / 2,
-                        top + (bottom - top) / 2,
+                        y,
                         view.xAxis.labels.build()
                     )
                 }

charts/src/main/java/com/dzeio/charts/series/SerieAbstract.kt

@@ -4,6 +4,7 @@ import android.graphics.Canvas
 import android.graphics.RectF
 import com.dzeio.charts.ChartView
 import com.dzeio.charts.Entry
+import kotlin.math.min
 
 abstract class SerieAbstract {
 
@@ -11,6 +12,18 @@ abstract class SerieAbstract {
 
     lateinit var view: ChartView
 
+    fun getYMax(displayedOnly: Boolean = false): Float {
+        var max = 0f
+        var localDatas = if (displayedOnly) datas.subList(
+            view.getXOffset(),
+            min(view.getXOffset() + view.getDisplayedEntries(), datas.size)
+        ) else datas
+        for (data in localDatas) {
+            if (max < data.y) max= data.y
+        }
+        return max
+    }
+
     /**
      * Animation updates
      */

charts/src/main/java/com/dzeio/charts/views/BarChartView.kt.old

@@ -2,15 +2,16 @@ package com.dzeio.charts.views
 
 import android.content.Context
 import android.graphics.Canvas
+import android.graphics.Color
 import android.graphics.Paint
 import android.graphics.Rect
-import android.graphics.RectF
 import android.util.AttributeSet
 import android.view.View
 import com.dzeio.charts.Animation
 import com.dzeio.charts.Entry
 import com.dzeio.charts.axis.XAxis
 import com.dzeio.charts.axis.YAxis
+import com.dzeio.charts.utils.drawDottedLine
 import kotlin.math.abs
 import kotlin.math.max
 import kotlin.math.min
@@ -60,7 +61,13 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
         it.isAntiAlias = true
         it.color = yAxis.color
     }
-    private val rect: RectF = RectF()
+
+    private var linePaint = Paint().apply {
+        color = Color.parseColor("#123456")
+        strokeWidth = 6f
+    }
+
+    private val rect: Rect = Rect()
 
     private var bottomTextDescent = 0
     private var bottomTextHeight = 0
@@ -101,9 +108,11 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
 
     var list: ArrayList<Entry> = arrayListOf()
 
+    private var fiftyPercent = 0f
+
     private var bottomTexts: ArrayList<String> = arrayListOf()
 
-    var previousRefresh = movementOffset
+    var previousOffset = getXOffset()
 
     fun refresh() {
         val r = Rect()
@@ -130,10 +139,13 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
             if (calculatedMax < 0) 0f else calculatedMax
         }
 
+        fiftyPercent = max / 2
+
         // make sure the target list
 //        Log.d(TAG, list.size.toString())
         targetPercentList = arrayListOf()
 
+//        Log.d(TAG, "List selected: ${getXOffset()} to ${getXOffset() + getDisplayedEntries() - 1}")
         for (item in list.subList(getXOffset(), getXOffset() + getDisplayedEntries())) {
             // // Process bottom texts
             val text = xAxis.onValueFormat(item.x)
@@ -160,15 +172,23 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
         }
 
         // post list
-        val movement = movementOffset - previousRefresh
+        val movement = getXOffset() - previousOffset
-        previousRefresh = movementOffset
+        previousOffset = getXOffset()
 //        Log.d(TAG, movement.toString())
         if (movement >= 1) {
-            percentList = percentList.subList(1, percentList.size).toCollection(ArrayList())
+            percentList = percentList.subList(min(movement, percentList.size), percentList.size).toCollection(
-            percentList.add(1f)
+                ArrayList()
+            )
+            for (i in 0 until movement) {
+                percentList.add(1f)
+            }
         } else if (movement <= -1) {
-            percentList = percentList.subList(0, percentList.size - 1).toCollection(ArrayList())
+            percentList = percentList.subList(0, percentList.size + movement).toCollection(
-            percentList.add(0, 1f)
+                ArrayList()
+            )
+            for (i in 0 until abs(movement)) {
+                percentList.add(0, 1f)
+            }
         }
         if (percentList.isEmpty() || percentList.size < targetPercentList.size) {
             val temp = targetPercentList.size - percentList.size
@@ -188,11 +208,32 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
             color = yAxis.color
         }
 
+        linePaint = Paint().apply {
+            color = yAxis.lineColor
+            strokeWidth = 4f
+        }
+
         removeCallbacks(animator)
         post(animator)
     }
 
+
     override fun onDraw(canvas: Canvas) {
+        val bottom = height - bottomTextHeight - textTopMargin.toFloat()
+
+        // draw sidebar and lines
+        val increment = bottom / yAxis.labelCount
+        val vIncrement = fiftyPercent * 2 / yAxis.labelCount
+        for (i in 0 until yAxis.labelCount) {
+            val text = (vIncrement * (yAxis.labelCount - i)).toString()
+            xAxis.labels.build().getTextBounds(text, 0, text.length, rect)
+            val posY = increment * i
+            canvas.drawDottedLine(0f, posY, measuredWidth.toFloat(), posY, 40f, linePaint)
+            canvas.drawText(text,
+                (measuredWidth - rect.width()).toFloat(), posY + rect.height() + 20f, xAxis.labels.build())
+//            canvas.drawDottedLine(0f, posY, measuredWidth.toFloat(), posY, 10f, linePaint)
+        }
+
         if (percentList.isNotEmpty()) {
             // draw each rectangles
             for (i in 1..percentList.size) {
@@ -200,7 +241,6 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
                 val left = spacing * i + barWidth * (i - 1).toFloat()
 //                Log.d(TAG, "$spacing, $i, $barWidth = $left")
                 val right = (spacing + barWidth) * i.toFloat()
-                val bottom = height - bottomTextHeight - textTopMargin.toFloat()
                 val top = bottom * percentList[i - 1]
 
                 // create rounded rect
@@ -227,7 +267,6 @@ class BarChartView @JvmOverloads constructor(context: Context?, attrs: Attribute
                 items += 1
             }
 
-            val rect = Rect()
 
 //            Log.i(TAG, "$size / max($numberOfLabels - 2, 2) = $items")
             for (s in bottomTexts) {