ThemeManager.h

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// Copyright 2015 - 2026, GIBIS-UNIFESP and the wiRedPanda contributors
// SPDX-License-Identifier: GPL-3.0-or-later

 
#pragma once
 
#include <QColor>
#include <QObject>
#include <QPalette>
 
#include "App/Core/Application.h"

enum class Theme { Light, Dark, System };

class ThemeAttributes
{
public:
    // --- Theme Setup ---

    void setTheme(const Theme theme);
 
    // --- Members: Scene Colors ---
 
    QColor m_sceneBgBrush;
    QColor m_sceneBgDots;
 
    // --- Members: Selection Colors ---
 
    QColor m_selectionBrush;
    QColor m_selectionPen;
 
    // --- Members: Label Colors ---
 
    QColor m_graphicElementLabelColor;
 
    // --- Members: Connection Colors ---
 
    QColor m_connectionUnknown;
    QColor m_connectionInactive;
    QColor m_connectionActive;
    QColor m_connectionError = QColor(Qt::red);
    QColor m_connectionSelected;
 
    // --- Members: Port Brush Colors ---
 
    QColor m_portUnknownBrush;
    QColor m_portInactiveBrush;
    QColor m_portActiveBrush;
    QColor m_portErrorBrush;
 
    // --- Members: Port Pen Colors ---
 
    QColor m_portUnknownPen;
    QColor m_portInactivePen;
    QColor m_portActivePen;
    QColor m_portErrorPen;
 
    // --- Members: Port Hover ---
 
    QColor m_portHoverPort;
 
    // --- Members: Port Hover Label ---
 
    QColor m_portHoverLabelBg;
    QColor m_portHoverLabelText;
};

class ThemeManager : public QObject
{
    Q_OBJECT
 
public:
    static ThemeManager &instance()
    {
        static ThemeManager instance;
        return instance;
    }

    static QString themePath();

    static Theme theme();

    static const ThemeAttributes &attributes();
 
    // --- Theme Management ---

    static void setTheme(const Theme theme);

    static Theme effectiveTheme();
 
signals:
    // --- Signals ---

    void themeChanged();
 
private:
    // --- Lifecycle ---
 
    explicit ThemeManager(QObject *parent = nullptr);

    static Theme resolveSystemTheme();

    void onSystemColorSchemeChanged();
 
    // --- Members ---
 
    Theme m_theme = Theme::System;
    ThemeAttributes m_attributes;
};