From dd83812b29634135fa7c9533b478834f52901a9b Mon Sep 17 00:00:00 2001
From: Andreas Ringlstetter <Ext3h@users.noreply.github.com>
Date: Mon, 16 Feb 2026 21:51:40 +0100
Subject: [PATCH] Toogle visibility of custom title bar based on fullscreen
 state (#814)

---
 src/FloatingDockContainer.cpp        |  6 ++++++
 src/linux/FloatingWidgetTitleBar.cpp | 14 ++++++++++++++
 src/linux/FloatingWidgetTitleBar.h   |  1 +
 3 files changed, 21 insertions(+)

diff --git a/src/FloatingDockContainer.cpp b/src/FloatingDockContainer.cpp
index 967aefa..fd4efe3 100644
--- a/src/FloatingDockContainer.cpp
+++ b/src/FloatingDockContainer.cpp
@@ -850,6 +850,12 @@ void CFloatingDockContainer::changeEvent(QEvent *event)
 				this->showMaximized();
 			}
 		}
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
+        if (d->TitleBar)
+        {
+            d->TitleBar->setVisible(!(isFloating() && isFullScreen()));
+        }
+#endif
 		break;
 
 	default:
diff --git a/src/linux/FloatingWidgetTitleBar.cpp b/src/linux/FloatingWidgetTitleBar.cpp
index 00e6fcd..77a631d 100644
--- a/src/linux/FloatingWidgetTitleBar.cpp
+++ b/src/linux/FloatingWidgetTitleBar.cpp
@@ -238,6 +238,20 @@ void CFloatingWidgetTitleBar::mouseDoubleClickEvent(QMouseEvent *event)
     }
 }
 
+//============================================================================
+QSize CFloatingWidgetTitleBar::sizeHint() const
+{
+    if (isVisible())
+    {
+        return QFrame::sizeHint();
+    }
+    else
+    {
+        // Allow titlebar to collapse when set invisible.
+        return QSize();
+    }
+}
+
 
 //============================================================================
 void CFloatingWidgetTitleBar::setMaximizedIcon(bool maximized)
diff --git a/src/linux/FloatingWidgetTitleBar.h b/src/linux/FloatingWidgetTitleBar.h
index ad6904f..4a6ceda 100644
--- a/src/linux/FloatingWidgetTitleBar.h
+++ b/src/linux/FloatingWidgetTitleBar.h
@@ -59,6 +59,7 @@ protected:
 	virtual void mouseReleaseEvent(QMouseEvent *ev) override;
 	virtual void mouseMoveEvent(QMouseEvent *ev) override;
     virtual void mouseDoubleClickEvent(QMouseEvent *event) override;
+    virtual QSize sizeHint() const override;
 
     void setMaximizeIcon(const QIcon& Icon);
     QIcon maximizeIcon() const;