add memory usage module with collector, scene, and script

panels/memory/memory_collector.gd

@@ -0,0 +1,36 @@
+extends RefCounted
+class_name MemoryCollector
+
+
+func collect() -> float:
+	var meminfo := _read_meminfo()
+	if meminfo.is_empty():
+		return 0.0
+
+	var total := meminfo.get("MemTotal", 0)
+	var available := meminfo.get("MemAvailable", 0)
+
+	if total == 0:
+		return 0.0
+
+	return 100.0 * (1.0 - float(available) / float(total))
+
+
+func _read_meminfo() -> Dictionary:
+	var file := FileAccess.open("/proc/meminfo", FileAccess.READ)
+	if file == null:
+		return {}
+
+	var result: Dictionary = {}
+	while not file.eof_reached():
+		var line: String = file.get_line().strip_edges()
+		if line.is_empty():
+			continue
+		var parts := line.split(":", false)
+		if parts.size() < 2:
+			continue
+		var key := parts[0].strip_edges()
+		var val_str := parts[1].strip_edges().split(" ", false)[0]
+		result[key] = val_str.to_int()
+
+	return result

panels/memory/memory_module.gd

@@ -0,0 +1,49 @@
+extends ModuleBase
+class_name MemoryModule
+
+
+@onready var title_label: Label = %Title
+@onready var label: Label = %Label
+@onready var progress: ProgressBar = %ProgressBar
+
+var _collector: MemoryCollector
+
+
+func initialize() -> void:
+	module_title = "Memory"
+	_collector = MemoryCollector.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, 0.7, 0.4, 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/memory/memory_module.tscn

@@ -0,0 +1,40 @@
+[gd_scene format=3 uid="uid://d2d4uqrd2hh3d"]
+
+[ext_resource type="Script" path="res://panels/memory/memory_module.gd" id="1"]
+
+[node name="MemoryModule" 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 = "Memory"
+
+[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