From 0c2d5998ff2430bc6f556c297471b84f12df9411 Mon Sep 17 00:00:00 2001
From: Damocles <damocles@darkest.space>
Date: Sun, 12 Apr 2026 18:11:30 +0200
Subject: [PATCH] backlight: hover slider panel, remove osd dependency

---
 modules/Backlight.qml | 156 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 152 insertions(+), 4 deletions(-)

diff --git a/modules/Backlight.qml b/modules/Backlight.qml
index 6d562b8..be98a29 100644
--- a/modules/Backlight.qml
+++ b/modules/Backlight.qml
@@ -1,6 +1,7 @@
 import QtQuick
 import Quickshell
 import Quickshell.Io
+import Quickshell.Wayland
 import "." as M
 
 M.BarSection {
@@ -8,11 +9,11 @@ M.BarSection {
     spacing: M.Theme.moduleSpacing
     opacity: M.Modules.backlight.enable && percent > 0 ? 1 : 0
     visible: opacity > 0
-    tooltip: "Brightness: " + root.percent + "%"
+    tooltip: ""
 
     property int percent: 0
-    onPercentChanged: if (percent > 0)
-        M.OsdState.show(percent / 100, "\uF185", root.mapToGlobal(root.width / 2, 0).x - (QsWindow.window?.screen?.x ?? 0), QsWindow.window?.screen ?? null)
+    property bool _panelHovered: false
+    readonly property bool _showPanel: root._hovered || _panelHovered
 
     Process {
         id: adjProc
@@ -28,7 +29,11 @@ M.BarSection {
         adjProc.running = true;
     }
 
-    // Detect backlight device dynamically
+    function setPercent(pct) {
+        adjProc.cmd = "light -S " + Math.round(Math.max(0, Math.min(100, pct)));
+        adjProc.running = true;
+    }
+
     property string _blDev: ""
     Process {
         id: detectBl
@@ -77,4 +82,147 @@ M.BarSection {
     WheelHandler {
         onWheel: event => root.adjust(event.angleDelta.y)
     }
+
+    PanelWindow {
+        id: panel
+
+        screen: QsWindow.window?.screen ?? null
+        visible: _winVisible
+        color: "transparent"
+
+        property bool _winVisible: false
+
+        WlrLayershell.layer: WlrLayer.Overlay
+        WlrLayershell.exclusiveZone: 0
+        WlrLayershell.namespace: "nova-backlight"
+
+        anchors.top: true
+        anchors.left: true
+
+        margins.top: 0
+        margins.left: Math.max(0, Math.min(
+            Math.round(root.mapToGlobal(root.width / 2, 0).x - (QsWindow.window?.screen?.x ?? 0) - implicitWidth / 2),
+            (panel.screen?.width ?? 1920) - implicitWidth
+        ))
+
+        implicitWidth: panelContent.width
+        implicitHeight: panelContent.height
+
+        Connections {
+            target: root
+            function on_ShowPanelChanged() {
+                if (root._showPanel) {
+                    panel._winVisible = true;
+                    hideAnim.stop();
+                    showAnim.start();
+                } else {
+                    showAnim.stop();
+                    hideAnim.start();
+                }
+            }
+        }
+
+        ParallelAnimation {
+            id: showAnim
+            NumberAnimation { target: panelContent; property: "opacity"; to: 1; duration: 120; easing.type: Easing.OutCubic }
+            NumberAnimation { target: panelContent; property: "y"; to: 0; duration: 150; easing.type: Easing.OutCubic }
+        }
+
+        ParallelAnimation {
+            id: hideAnim
+            NumberAnimation { target: panelContent; property: "opacity"; to: 0; duration: 150; easing.type: Easing.InCubic }
+            NumberAnimation { target: panelContent; property: "y"; to: -panelContent.height; duration: 150; easing.type: Easing.InCubic }
+            onFinished: panel._winVisible = false
+        }
+
+        MouseArea {
+            anchors.fill: parent
+            hoverEnabled: true
+            onContainsMouseChanged: root._panelHovered = containsMouse
+        }
+
+        Rectangle {
+            x: panelContent.x
+            y: panelContent.y
+            width: panelContent.width
+            height: panelContent.height
+            color: M.Theme.base01
+            opacity: panelContent.opacity * Math.max(M.Theme.barOpacity, 0.85)
+            topLeftRadius: 0
+            topRightRadius: 0
+            bottomLeftRadius: M.Theme.radius
+            bottomRightRadius: M.Theme.radius
+        }
+
+        Column {
+            id: panelContent
+            width: 200
+            opacity: 0
+            y: -height
+
+            Item {
+                width: parent.width
+                height: 36
+
+                Text {
+                    id: blIcon
+                    anchors.left: parent.left
+                    anchors.leftMargin: 12
+                    anchors.verticalCenter: parent.verticalCenter
+                    text: "\uF185"
+                    color: M.Theme.base0A
+                    font.pixelSize: M.Theme.fontSize + 2
+                    font.family: M.Theme.iconFontFamily
+                }
+
+                Item {
+                    id: slider
+                    anchors.left: blIcon.right
+                    anchors.leftMargin: 8
+                    anchors.right: blLabel.left
+                    anchors.rightMargin: 8
+                    anchors.verticalCenter: parent.verticalCenter
+                    height: 6
+
+                    Rectangle {
+                        anchors.fill: parent
+                        color: M.Theme.base02
+                        radius: 3
+                    }
+
+                    Rectangle {
+                        width: parent.width * root.percent / 100
+                        height: parent.height
+                        color: M.Theme.base0A
+                        radius: 3
+
+                        Behavior on width { NumberAnimation { duration: 80 } }
+                    }
+
+                    MouseArea {
+                        anchors.fill: parent
+                        anchors.margins: -6
+                        cursorShape: Qt.PointingHandCursor
+                        onPressed: mouse => _set(mouse)
+                        onPositionChanged: mouse => { if (pressed) _set(mouse); }
+                        function _set(mouse) {
+                            root.setPercent(mouse.x / slider.width * 100);
+                        }
+                    }
+                }
+
+                Text {
+                    id: blLabel
+                    anchors.right: parent.right
+                    anchors.rightMargin: 12
+                    anchors.verticalCenter: parent.verticalCenter
+                    text: root.percent + "%"
+                    color: M.Theme.base05
+                    font.pixelSize: M.Theme.fontSize
+                    font.family: M.Theme.fontFamily
+                    width: 30
+                }
+            }
+        }
+    }
 }