Piano: Add nice scale factor to WaveWidget

Author: https://github.com/willmcpherson2
Commit: 255edcb525
Pull-request: https://github.com/SerenityOS/serenity/pull/1204
Reviewed-by: https://github.com/awesomekling ✅

Applications/Piano/WaveWidget.cpp

@@ -45,6 +45,8 @@ WaveWidget::~WaveWidget()
 
 int WaveWidget::sample_to_y(int sample) const
 {
+    constexpr int nice_scale_factor = 4;
+    sample *= nice_scale_factor;
     constexpr double sample_max = std::numeric_limits<i16>::max();
     double percentage = sample / sample_max;
     double portion_of_half_height = percentage * ((frame_inner_rect().height() - 1) / 2.0);