[chronojump] chronojumpLogo size/alpha changes depending on timer (avoiding problems on slow systems)

[Xavier de Blas <xaviblas src gnome org>]

commit eb7566610e530863f6e5d9176c1b82ea6db48d53
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Sep 4 18:03:54 2020 +0200

    chronojumpLogo size/alpha changes depending on timer (avoiding problems on slow systems)

 src/gui/app1/chronojumpLogo.cs | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)
---
diff --git a/src/gui/app1/chronojumpLogo.cs b/src/gui/app1/chronojumpLogo.cs
index 823ed6f0..2a2339b4 100644
--- a/src/gui/app1/chronojumpLogo.cs
+++ b/src/gui/app1/chronojumpLogo.cs
@@ -32,7 +32,9 @@ public class ChronojumpLogo
        private bool timer;
        private double alpha;
        private double size;
-       private Stopwatch stopwatch;
+       private Stopwatch stopwatch1;
+       private Stopwatch stopwatch2;
+       private Stopwatch stopwatch3;
 
        private Gtk.DrawingArea drawingarea;    //contains the animation
        private Gtk.Viewport viewport;          //contains the logo and version number
@@ -57,9 +59,14 @@ public class ChronojumpLogo
                timer = true;
                alpha = 1.0;
                size = 1.0;
-               stopwatch = new Stopwatch();
+               stopwatch1 = new Stopwatch();
+               stopwatch2 = new Stopwatch();
+               stopwatch3 = new Stopwatch();
 
                GLib.Timeout.Add(12, new GLib.TimeoutHandler(onTimer));
+               //GLib.Timeout.Add(30, new GLib.TimeoutHandler(onTimer));
+               stopwatch1.Start();
+
                LogB.Information("Chronojump logo constructor end");
        }
 
@@ -92,19 +99,24 @@ public class ChronojumpLogo
 
                bool showVersion = false;
                if (size <= 80)
-                       size += 0.6;
+                       //size += 0.6;
+                       size = stopwatch1.Elapsed.TotalMilliseconds / 20.0;
 
                if(size > 20)
                {
-                       alpha -= 0.01;
+                       //alpha -= 0.01;
+                       if(! stopwatch2.IsRunning)
+                               stopwatch2.Start();
+                       alpha = 1 - stopwatch2.Elapsed.TotalMilliseconds * 0.00083;
+
                        if(alpha < 0)
                        {
                                alpha = 0;
-                               stopwatch.Start();
+                               stopwatch3.Start();
                        }
                }
 
-               if (stopwatch.Elapsed.TotalMilliseconds >= 300)
+               if (stopwatch3.Elapsed.TotalMilliseconds >= 300)
                        timer = false;
 
                chronojumpLogo_showChronojump (cr, x, y);