launcher: fix wallpaper preview colours

Also disable transparency action (not impled and won't be in the near future)

modules/launcher/Actions.qml

@@ -42,6 +42,7 @@ Singleton {
             name: qsTr("Transparency")
             desc: qsTr("Change shell transparency")
             icon: "opacity"
+            disabled: true
 
             function onClicked(list: AppList): void {
                 root.autocomplete(list, "transparency");

modules/launcher/Content.qml

@@ -81,6 +81,8 @@ Item {
                 const currentItem = list.currentList?.currentItem;
                 if (currentItem) {
                     if (list.showWallpapers) {
+                        if (currentItem.modelData.path !== Wallpapers.actualCurrent)
+                            Wallpapers.previewColourLock = true;
                         Wallpapers.setWallpaper(currentItem.modelData.path);
                         root.visibilities.launcher = false;
                     } else if (text.startsWith(Config.launcher.actionPrefix)) {

services/Colours.qml

@@ -12,7 +12,6 @@ Singleton {
     readonly property list<string> colourNames: ["rosewater", "flamingo", "pink", "mauve", "red", "maroon", "peach", "yellow", "green", "teal", "sky", "sapphire", "blue", "lavender"]
 
     property bool showPreview
-    property bool endPreviewOnNextChange
     property bool light
     readonly property Colours palette: showPreview ? preview : current
     readonly property Colours current: Colours {}
@@ -45,11 +44,6 @@ Singleton {
             if (colours.hasOwnProperty(propName))
                 colours[propName] = `#${colour}`;
         }
-
-        if (!isPreview || (isPreview && endPreviewOnNextChange)) {
-            showPreview = false;
-            endPreviewOnNextChange = false;
-        }
     }
 
     function setMode(mode: string): void {

services/Wallpapers.qml

@@ -18,6 +18,7 @@ Singleton {
     readonly property string current: showPreview ? previewPath : actualCurrent
     property string previewPath
     property string actualCurrent
+    property bool previewColourLock
 
     readonly property list<var> preppedWalls: list.map(w => ({
                 name: Fuzzy.prepare(w.name),
@@ -35,8 +36,7 @@ Singleton {
 
     function setWallpaper(path: string): void {
         actualCurrent = path;
-        setWall.path = path;
-        setWall.startDetached();
+        Quickshell.execDetached(["caelestia", "wallpaper", "-f", path]);
     }
 
     function preview(path: string): void {
@@ -47,7 +47,8 @@ Singleton {
 
     function stopPreview(): void {
         showPreview = false;
-        Colours.endPreviewOnNextChange = true;
+        if (!previewColourLock)
+            Colours.showPreview = false;
     }
 
     reloadableId: "wallpapers"
@@ -72,7 +73,10 @@ Singleton {
         path: root.currentNamePath
         watchChanges: true
         onFileChanged: reload()
-        onLoaded: root.actualCurrent = text().trim()
+        onLoaded: {
+            root.actualCurrent = text().trim();
+            root.previewColourLock = false;
+        }
     }
 
     Process {
@@ -87,14 +91,6 @@ Singleton {
         }
     }
 
-    Process {
-        id: setWall
-
-        property string path
-
-        command: ["caelestia", "wallpaper", "-f", path]
-    }
-
     Process {
         running: true
         command: ["find", root.path, "-type", "d", "-path", '*/.*', "-prune", "-o", "-not", "-name", '.*', "-type", "f", "-print"]