From ed52bc55df7a9f2bcc9f1149a82483c00a8107c2 Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Thu, 9 Apr 2026 18:00:35 +0100
Subject: [PATCH] Backport Qt implementation of calltips in Scintilla

* Taken from https://sourceforge.net/p/scintilla/code/ci/a82b87a88556f0bc23b7ff6
  f4bdfd5241ef44a62/ upstream
---
 .../qt/ScintillaEditBase/ScintillaQt.cpp      | 27 ++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/qrenderdoc/3rdparty/scintilla/qt/ScintillaEditBase/ScintillaQt.cpp b/qrenderdoc/3rdparty/scintilla/qt/ScintillaEditBase/ScintillaQt.cpp
index b872b1363..777f0dedf 100644
--- a/qrenderdoc/3rdparty/scintilla/qt/ScintillaEditBase/ScintillaQt.cpp
+++ b/qrenderdoc/3rdparty/scintilla/qt/ScintillaEditBase/ScintillaQt.cpp
@@ -616,11 +616,36 @@ void ScintillaQt::StartDrag()
 	SetDragPosition(SelectionPosition(invalidPosition));
 }
 
+class CallTipImpl : public QWidget {
+public:
+	CallTipImpl(CallTip *pct_)
+		: QWidget(nullptr, Qt::ToolTip),
+		  pct(pct_)
+	{
+		setWindowFlag(Qt::WindowTransparentForInput);
+	}
+
+	void paintEvent(QPaintEvent *) override
+	{
+		if (pct->inCallTipMode) {
+			Surface *surfaceWindow = Surface::Allocate(0);
+			surfaceWindow->Init(this);
+			surfaceWindow->SetUnicodeMode(SC_CP_UTF8 == pct->codePage);
+			surfaceWindow->SetDBCSMode(pct->codePage);
+			pct->PaintCT(surfaceWindow);
+			delete surfaceWindow;
+		}
+	}
+
+private:
+	CallTip *pct;
+};
+
 void ScintillaQt::CreateCallTipWindow(PRectangle rc)
 {
 
 	if (!ct.wCallTip.Created()) {
-		QWidget *pCallTip =  new QWidget(0, Qt::ToolTip);
+		QWidget *pCallTip = new CallTipImpl(&ct);
 		ct.wCallTip = pCallTip;
 		pCallTip->move(rc.left, rc.top);
 		pCallTip->resize(rc.Width(), rc.Height());