From 4b553e8fce75afd0ad0df2e752edafe739db44dc Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Fri, 19 Mar 2021 14:46:09 +1100
Subject: Add Surface::PixelDivisions which detects 'retina' displays that use
 multiple display pixels per logical pixel. Likely will only return >1 for
 Apple displays. Can be used for finer placement of elements.

---
 qt/ScintillaEditBase/PlatQt.cpp | 6 ++++++
 qt/ScintillaEditBase/PlatQt.h   | 1 +
 2 files changed, 7 insertions(+)

(limited to 'qt')

diff --git a/qt/ScintillaEditBase/PlatQt.cpp b/qt/ScintillaEditBase/PlatQt.cpp
index b7d0e3a53..1b8f75c02 100644
--- a/qt/ScintillaEditBase/PlatQt.cpp
+++ b/qt/ScintillaEditBase/PlatQt.cpp
@@ -263,6 +263,12 @@ int SurfaceImpl::LogPixelsY()
 	return device->logicalDpiY();
 }
 
+int SurfaceImpl::PixelDivisions()
+{
+	// Qt uses device pixels.
+	return 1;
+}
+
 int SurfaceImpl::DeviceHeightFont(int points)
 {
 	return points;
diff --git a/qt/ScintillaEditBase/PlatQt.h b/qt/ScintillaEditBase/PlatQt.h
index ae0994b32..7b43e0b02 100644
--- a/qt/ScintillaEditBase/PlatQt.h
+++ b/qt/ScintillaEditBase/PlatQt.h
@@ -94,6 +94,7 @@ public:
 	bool Initialised() override;
 	void PenColour(ColourDesired fore) override;
 	int LogPixelsY() override;
+	int PixelDivisions() override;
 	int DeviceHeightFont(int points) override;
 	void MoveTo(int x_, int y_) override;
 	void LineTo(int x_, int y_) override;
-- 
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