Animation overshoot: support negative values

src/gui/Base/HBox.qml

@@ -16,7 +16,7 @@ HFlickableColumnPage {
         running: true
         from: 0
         to: 1
-        overshoot: 3
+        overshoot: 2
     }
 
     Behavior on implicitWidth { HNumberAnimation {} }

src/gui/Base/HCheckBox.qml

@@ -52,7 +52,7 @@ CheckBox {
 
             Behavior on scale {
                 HNumberAnimation {
-                    overshoot: 4
+                    overshoot: 3
                     easing.type: Easing.InOutBack
                     factor: 0.5
                 }

src/gui/Base/HNumberAnimation.qml

@@ -4,10 +4,17 @@ import QtQuick 2.12
 
 NumberAnimation {
     property real factor: 1.0
-    property real overshoot: 1.0
+    property real overshoot: 0.0
 
 
-    duration: theme.animationDuration * Math.max(overshoot / 1.7, 1.0) * factor
-    easing.type: overshoot > 1 ? Easing.OutBack : Easing.Linear
+    duration:
+        theme.animationDuration *
+        Math.max((1 + Math.abs(overshoot)) / 1.7, 1.0) * factor
+
+    easing.type:
+        overshoot > 0 ? Easing.OutBack :
+        overshoot < 0 ? Easing.InBack :
+        Easing.Linear
+
     easing.overshoot: overshoot
 }

src/gui/Base/HPopup.qml

@@ -29,7 +29,7 @@ Popup {
     y: (parent.height - height) / 2
 
     enter: Transition {
-        HNumberAnimation { property: "scale"; from: 0; to: 1; overshoot: 4 }
+        HNumberAnimation { property: "scale"; from: 0; to: 1; overshoot: 3 }
     }
 
     exit: Transition {

src/gui/Base/HTabbedBox.qml

@@ -22,7 +22,7 @@ HPage {
         running: true
         from: 0
         to: 1
-        overshoot: 3
+        overshoot: 2
     }
 
     Behavior on implicitWidth { HNumberAnimation {} }

src/gui/Window.qml

@@ -94,6 +94,6 @@ ApplicationWindow {
         scale: py.ready ? 1 : 0.5
         source: py.ready ? (Qt.application.arguments[1] || "UI.qml") : ""
 
-        Behavior on scale { HNumberAnimation { overshoot: 5; factor: 1.2 } }
+        Behavior on scale { HNumberAnimation { overshoot: 3; factor: 1.2 } }
     }
 }