From ccf3addf5a63cee5090b0e23a0408a4d7db45124 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 10 Jun 2025 20:27:41 +0200
Subject: [PATCH] Add spacer widget to maintain size with GUI scaling

This is intended for the (Mixbus) Group Bar
---
 libs/widgets/ardour_spacer.cc        |  8 ++++++++
 libs/widgets/widgets/ardour_spacer.h | 23 +++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/libs/widgets/ardour_spacer.cc b/libs/widgets/ardour_spacer.cc
index ad5406a05b..6058c89646 100644
--- a/libs/widgets/ardour_spacer.cc
+++ b/libs/widgets/ardour_spacer.cc
@@ -21,6 +21,14 @@
 
 using namespace ArdourWidgets;
 
+ArdourScalingSpacer::ArdourScalingSpacer (int natural_width, int natural_height)
+	: CairoWidget ()
+	, _natural_width (natural_width)
+	, _natural_height (natural_height)
+{
+}
+
+
 ArdourVSpacer::ArdourVSpacer (float r)
 	: CairoWidget ()
 	, ratio (r)
diff --git a/libs/widgets/widgets/ardour_spacer.h b/libs/widgets/widgets/ardour_spacer.h
index 4b2f8b1f2a..7d078c6e97 100644
--- a/libs/widgets/widgets/ardour_spacer.h
+++ b/libs/widgets/widgets/ardour_spacer.h
@@ -29,6 +29,29 @@
 
 namespace ArdourWidgets {
 
+class LIBWIDGETS_API ArdourScalingSpacer : public CairoWidget
+{
+public:
+	ArdourScalingSpacer (int natural_width = 16, int natural_height = 16);
+
+protected:
+	void render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t*) {}
+
+	void on_size_request (Gtk::Requisition* req) {
+		if (_natural_width > 0) {
+			req->width = _natural_width * UIConfigurationBase::instance().get_ui_scale ();
+		}
+		if (_natural_height > 0) {
+			req->height = _natural_height * UIConfigurationBase::instance().get_ui_scale ();
+		}
+		CairoWidget::on_size_request (req);
+	}
+
+private:
+	int _natural_width;
+	int _natural_height;
+};
+
 class LIBWIDGETS_API ArdourVSpacer : public CairoWidget
 {
 public: