Added custom title bar & border color when focused

src/titlebar.h

@@ -0,0 +1,40 @@
+#pragma once
+#include "themes/theme.h"
+#include <QWidget>
+#include <QMenuBar>
+#include <QToolButton>
+#include <QLabel>
+#include <QHBoxLayout>
+
+namespace rcx {
+
+class TitleBarWidget : public QWidget {
+    Q_OBJECT
+public:
+    explicit TitleBarWidget(QWidget* parent = nullptr);
+
+    QMenuBar* menuBar() const { return m_menuBar; }
+    void setTitle(const QString& title);
+    void applyTheme(const Theme& theme);
+
+    void updateMaximizeIcon();
+
+protected:
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseDoubleClickEvent(QMouseEvent* event) override;
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    QMenuBar*    m_menuBar    = nullptr;
+    QLabel*      m_titleLabel = nullptr;
+    QToolButton* m_btnMin     = nullptr;
+    QToolButton* m_btnMax     = nullptr;
+    QToolButton* m_btnClose   = nullptr;
+
+    Theme m_theme;
+
+    QToolButton* makeChromeButton(const QString& iconPath);
+    void toggleMaximize();
+};
+
+} // namespace rcx