add cpu module with /proc/stat collector, visible grid cells, dark background, and fullscreen dashboard

panels/cpu/cpu_collector.gd

@@ -0,0 +1,51 @@
+extends RefCounted
+class_name CpuCollector
+
+
+var _previous_total: int = 0
+var _previous_idle: int = 0
+var _has_previous: bool = false
+
+
+func collect() -> float:
+    var stats: PackedStringArray = _read_stats()
+    if stats.is_empty():
+        return 0.0
+
+    var total: int = 0
+    var idle: int = 0
+
+    for i in range(1, stats.size()):
+        var val: int = stats[i].to_int()
+        total += val
+        if i == 4:  # idle is the 4th token (index 4)
+            idle = val
+
+    if not _has_previous:
+        _previous_total = total
+        _previous_idle = idle
+        _has_previous = true
+        return 0.0
+
+    var total_delta: int = total - _previous_total
+    var idle_delta: int = idle - _previous_idle
+
+    _previous_total = total
+    _previous_idle = idle
+
+    if total_delta == 0:
+        return 0.0
+
+    return 100.0 * (1.0 - float(idle_delta) / float(total_delta))
+
+
+func _read_stats() -> PackedStringArray:
+    var file := FileAccess.open("/proc/stat", FileAccess.READ)
+    if file == null:
+        return PackedStringArray()
+
+    var line: String = file.get_line()
+    if not line.begins_with("cpu "):
+        return PackedStringArray()
+
+    return line.split(" ", false)

panels/cpu/cpu_module.gd

@@ -0,0 +1,49 @@
+extends ModuleBase
+class_name CpuModule
+
+
+@onready var title_label: Label = %Title
+@onready var label: Label = %Label
+@onready var progress: ProgressBar = %ProgressBar
+
+var _collector: CpuCollector
+
+
+func initialize() -> void:
+    module_title = "CPU"
+    _collector = CpuCollector.new()
+    _style()
+
+
+func refresh(data: Dictionary) -> void:
+    var usage: float = _collector.collect()
+    if usage < 0.0:
+        return
+
+    var pct: int = roundi(usage)
+    label.text = "%d%%" % pct
+    progress.value = pct
+
+
+func _style() -> void:
+    title_label.add_theme_color_override("font_color", Color(0.7, 0.7, 0.8, 1.0))
+
+    label.add_theme_color_override("font_color", Color(0.9, 0.9, 1.0, 1.0))
+    label.add_theme_font_size_override("font_size", 48)
+
+    var fg := StyleBoxFlat.new()
+    fg.bg_color = Color(0.2, 0.5, 0.8, 1.0)
+    fg.corner_radius_top_left = 4
+    fg.corner_radius_top_right = 4
+    fg.corner_radius_bottom_right = 4
+    fg.corner_radius_bottom_left = 4
+
+    var bg := StyleBoxFlat.new()
+    bg.bg_color = Color(0.1, 0.1, 0.14, 1.0)
+    bg.corner_radius_top_left = 4
+    bg.corner_radius_top_right = 4
+    bg.corner_radius_bottom_right = 4
+    bg.corner_radius_bottom_left = 4
+
+    progress.add_theme_stylebox_override("fill", fg)
+    progress.add_theme_stylebox_override("background", bg)

panels/cpu/cpu_module.tscn

@@ -0,0 +1,40 @@
+[gd_scene format=3 uid="uid://bq3bs2hb4r7fb"]
+
+[ext_resource type="Script" path="res://panels/cpu/cpu_module.gd" id="1"]
+
+[node name="CpuModule" type="PanelContainer"]
+anchors_preset = 0
+script = ExtResource("1")
+
+[node name="MarginContainer" type="MarginContainer" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+theme_constant_overrides/margin_left = 12
+theme_constant_overrides/margin_top = 12
+theme_constant_overrides/margin_right = 12
+theme_constant_overrides/margin_bottom = 12
+
+[node name="VBoxContainer" type="VBoxContainer" parent="MarginContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+
+[node name="Title" type="Label" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
+text = "CPU"
+
+[node name="Spacer" type="Control" parent="MarginContainer/VBoxContainer"]
+size_flags_vertical = 3
+
+[node name="Label" type="Label" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
+horizontal_alignment = 1
+size_flags_horizontal = 4
+
+[node name="ProgressBar" type="ProgressBar" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
+size_flags_horizontal = 4
+max_value = 100.0
+value = 0.0
+show_percentage = false