accept only odd numbers for iconSize and zoom

containment/package/contents/ui/abilities/ParabolicEffect.qml

@@ -31,7 +31,8 @@ Ability.ParabolicEffectPrivate {
     factor.zoom: {
         var storedZoom = LatteCore.WindowSystem.compositingActive && animations.active ? ( 1 + (plasmoid.configuration.zoomLevel / 20) ) : 1;
         var maxSize = storedZoom * metrics.iconSize;
-        maxSize = Math.round(maxSize);
+        //! round to nearest odd number
+        maxSize = 2 * Math.round(Math.round(maxSize) / 2);
 
         //! this way we make sure that the iconSize at the maximum of its parabolic effect is an integer
         return (maxSize/metrics.iconSize);

containment/package/contents/ui/abilities/privates/MetricsPrivate.qml

@@ -35,14 +35,22 @@ AbilityHost.Metrics {
 
     //! private properties to avoid too many not needed animation calculations
     readonly property int _iconSize: autosizeEnabled && autosize.iconSize > 0 ? Math.min(autosize.iconSize, maxIconSize) : maxIconSize
-    readonly property int _maxIconSize: portionIconSize!==-1 ? portionIconSize : plasmoid.configuration.iconSize
+    readonly property int _maxIconSize: {
+        //! round to nearest odd number
+        var storedIconSize = 2 * Math.round(plasmoid.configuration.iconSize / 2)
+
+        return portionIconSize!==-1 ? portionIconSize : storedIconSize;
+    }
 
     //! Private Properties
     readonly property int portionIconSize: { //icon size based on screen height
         if ((plasmoid.configuration.proportionIconSize===-1) || !latteView)
             return -1;
 
-        return Math.max(16,Math.round(latteView.screenGeometry.height * plasmoid.configuration.proportionIconSize/100));
+        var basedOnScreenHeight = Math.max(16,Math.round(latteView.screenGeometry.height * plasmoid.configuration.proportionIconSize/100))
+
+        //! round to nearest odd number
+        return 2 * Math.round(basedOnScreenHeight/2);
     }
 
     readonly property bool autosizeEnabled: autosize !== undefined && autosize.isActive

shell/package/contents/configuration/pages/AppearanceConfig.qml

@@ -84,16 +84,17 @@ PlasmaComponents.Page {
                     LatteComponents.Slider {
                         id: appletsSizeSlider
                         Layout.fillWidth: true
-                        value: plasmoid.configuration.iconSize
+                        //!round to nearest odd number
+                        value: 2 * Math.round(plasmoid.configuration.iconSize / 2)
                         from: 16
                         to: 512
-                        stepSize: dialog.advancedLevel || (plasmoid.configuration.iconSize % 8 !== 0) || dialog.viewIsPanel ? 1 : 8
+                        stepSize: dialog.advancedLevel || (plasmoid.configuration.iconSize % 8 !== 0) || dialog.viewIsPanel ? 2 : 8
                         wheelEnabled: false
 
                         function updateIconSize() {
                             if (!pressed) {
-                                plasmoid.configuration.iconSize = value
-                                syncGeometry.restart()
+                                plasmoid.configuration.iconSize = value;
+                                syncGeometry.restart();
                             }
                         }