Merge branch '22-compute-gradient-color-from-bar-height' into 'master'

Resolve "Compute gradient color from bar height"

Closes #22

See merge request !16

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.14
-app.versionCode=14
+app.versionName=0.0.15
+app.versionCode=15

fastlane/metadata/android/en-US/changelogs/15.txt

+Gradients uniformisation on bars of same charts.

fastlane/metadata/android/fr-FR/changelogs/15.txt

+Uniformisation des dégradés de couleur entre les barres du même graphique.

lib/ui/widgets/charts/custom_bar_chart.dart

@@ -55,7 +55,7 @@ class CustomBarChart extends StatelessWidget {
       required double value,
       required Color barColor,
       required double barWidth}) {
-    final gradient = this.getGradient(barColor);
+    final gradient = this.getGradient(barColor, value, this.getMaxCountsValue());
     final borderColor = barColor.darken(20);
 
     return BarChartGroupData(
@@ -75,10 +75,12 @@ class CustomBarChart extends StatelessWidget {
     );
   }
 
-  LinearGradient getGradient(Color baseColor) {
+  LinearGradient getGradient(Color baseColor, double value, double maxValue) {
+    double alignmentTopValue = value != 0.0 ? -2 * maxValue / value + 1 : 0;
+
     return LinearGradient(
-      begin: Alignment.topLeft,
-      end: Alignment(0.8, 1),
+      begin: Alignment(-1, alignmentTopValue),
+      end: Alignment(1, 1),
       colors: <Color>[
         baseColor.lighten(30),
         baseColor,

pubspec.yaml

@@ -3,7 +3,7 @@ description: Display scrobbles data and charts
 
 publish_to: 'none'
 
-version: 0.0.14+14
+version: 0.0.15+15
 
 environment:
   sdk: '^3.0.0'