Improved animations (#907)

* Smoother countdown and new menu and in-game animations

- Countdown digits pop in and fade out each second, with a ring of dots showing the remaining part of the second
- Medley countdown uses a smoothed timer and no longer stutters
- Rating popups scale in from below and drift upwards while fading out
- Player scores pulse briefly at the end of a line
- Pause menu fades and scales in and out
- Buttons and select slides pulse briefly when they get selected
- Shared easing functions and a draw transform for animations

* Retrigger CI

VocaluxeLib/Menu/CButton.cs

@@ -15,6 +15,7 @@
 // along with Vocaluxe. If not, see <http://www.gnu.org/licenses/>.
 #endregion
 
+using System;
 using System.Diagnostics;
 using System.Xml.Serialization;
 using VocaluxeLib.Draw;
@@ -74,10 +75,17 @@ namespace VocaluxeLib.Menu
             }
         }
 
+        private readonly Stopwatch _SelectTimer = new Stopwatch();
+
         public override bool Selected
         {
             set
             {
+                if (value && !base.Selected)
+                {
+                    _SelectTimer.Restart();
+                }
+
                 base.Selected = value;
                 Text.Selected = value;
             }
@@ -171,6 +179,38 @@ namespace VocaluxeLib.Menu
         }
 
         public void Draw()
+        {
+            var scale = _GetSelectionScale();
+            if (scale > 1f)
+            {
+                CBase.Drawing.PushTransform(scale, Rect.X + Rect.W / 2f, Rect.Y + Rect.H / 2f, 0f, 1f);
+                _DrawButton();
+                CBase.Drawing.PopTransform();
+            }
+            else
+            {
+                _DrawButton();
+            }
+        }
+
+        private float _GetSelectionScale()
+        {
+            if (!Selected || !_Selectable || !_SelectTimer.IsRunning || CBase.Settings.GetProgramState() == EProgramState.EditTheme)
+            {
+                return 1f;
+            }
+
+            var progress = _SelectTimer.ElapsedMilliseconds / 450f;
+            if (progress >= 1f)
+            {
+                _SelectTimer.Stop();
+                return 1f;
+            }
+
+            return 1f + 0.025f * (float)Math.Sin(Math.PI * progress);
+        }
+
+        private void _DrawButton()
         {
             if (!Visible && CBase.Settings.GetProgramState() != EProgramState.EditTheme)
             {

VocaluxeLib/Menu/CRatingPopup.cs

@@ -1,4 +1,5 @@
-using System.Xml.Serialization;
+using System;
+using System.Xml.Serialization;
 using VocaluxeLib.Draw;
 
 namespace VocaluxeLib.Menu
@@ -29,6 +30,8 @@ namespace VocaluxeLib.Menu
         public bool ThemeLoaded { get; private set; }
         public CText Text;
         public float Alpha = 1;
+        public float Scale = 1;
+        public float OffsetY;
         public SColorF Color;
 
         public CRatingPopup(int partyModeId)
@@ -65,12 +68,37 @@ namespace VocaluxeLib.Menu
             color.A = Alpha;
             Text.Color.A = Alpha;
 
+            var w = Rect.W * Scale;
+            var h = Rect.H * Scale;
+            var x = Rect.X + (Rect.W - w) / 2f;
+            var y = Rect.Y + (Rect.H - h) / 2f + OffsetY;
+
             if (_TextureRatingPopup != null)
             {
-                CBase.Drawing.DrawTexture(_TextureRatingPopup, Rect, color, false);
+                CBase.Drawing.DrawTexture(_TextureRatingPopup, new SRectF(x, y, w, h, Rect.Z), color, false);
             }
 
-            Text.DrawRelative(Rect.X, Rect.Y);
+            if (Math.Abs(Scale - 1f) < 0.001f)
+            {
+                Text.DrawRelative(x, y);
+                return;
+            }
+
+            var textX = Text.X;
+            var textY = Text.Y;
+            var textW = Text.W;
+            var fontHeight = Text.Font.Height;
+
+            Text.X = textX * Scale;
+            Text.Y = textY * Scale;
+            Text.W = textW * Scale;
+            Text.Font.Height = fontHeight * Scale;
+            Text.DrawRelative(x, y);
+
+            Text.X = textX;
+            Text.Y = textY;
+            Text.W = textW;
+            Text.Font.Height = fontHeight;
         }
 
         public object GetTheme()

VocaluxeLib/Menu/CSelectSlide.cs

@@ -144,10 +144,17 @@ namespace VocaluxeLib.Menu
             }
         }
 
+        private readonly Stopwatch _SelectTimer = new Stopwatch();
+
         public override bool Selected
         {
             set
             {
+                if (value && !base.Selected)
+                {
+                    _SelectTimer.Restart();
+                }
+
                 base.Selected = value;
 
                 if (!value)
@@ -582,6 +589,38 @@ namespace VocaluxeLib.Menu
         }
 
         public void Draw()
+        {
+            var scale = _GetSelectionScale();
+            if (scale > 1f)
+            {
+                CBase.Drawing.PushTransform(scale, Rect.X + Rect.W / 2f, Rect.Y + Rect.H / 2f, 0f, 1f);
+                _DrawSelectSlide();
+                CBase.Drawing.PopTransform();
+            }
+            else
+            {
+                _DrawSelectSlide();
+            }
+        }
+
+        private float _GetSelectionScale()
+        {
+            if (!Selected || !_SelectTimer.IsRunning || CBase.Settings.GetProgramState() == EProgramState.EditTheme)
+            {
+                return 1f;
+            }
+
+            var progress = _SelectTimer.ElapsedMilliseconds / 450f;
+            if (progress >= 1f)
+            {
+                _SelectTimer.Stop();
+                return 1f;
+            }
+
+            return 1f + 0.025f * (float)Math.Sin(Math.PI * progress);
+        }
+
+        private void _DrawSelectSlide()
         {
             if (!Visible && CBase.Settings.GetProgramState() != EProgramState.EditTheme)
             {