2 files changed, 26 insertions, 0 deletions
diff --git a/qt/ScintillaEditBase/PlatQt.cpp b/qt/ScintillaEditBase/PlatQt.cpp
index 26890e4b7..1f4c3fb05 100644
--- a/qt/ScintillaEditBase/PlatQt.cpp
+++ b/qt/ScintillaEditBase/PlatQt.cpp
@@ -349,6 +349,26 @@ void SurfaceImpl::AlphaRectangle(PRectangle rc,
 	GetPainter()->drawRoundedRect(rect, radius, radius);
 }
 
+void SurfaceImpl::GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) {
+	QRectF rect = QRectFFromPRect(rc);
+	QLinearGradient linearGradient;
+	switch (options) {
+	case GradientOptions::leftToRight:
+		linearGradient = QLinearGradient(rc.left, rc.top, rc.right, rc.top);
+		break;
+	case GradientOptions::topToBottom:
+	default:
+		linearGradient = QLinearGradient(rc.left, rc.top, rc.left, rc.bottom);
+		break;
+	}
+	linearGradient.setSpread(QGradient::RepeatSpread);
+	for (const ColourStop &stop : stops) {
+		linearGradient.setColorAt(stop.position, QColorFromColourAlpha(stop.colour));
+	}
+	QBrush brush = QBrush(linearGradient);
+	GetPainter()->fillRect(rect, brush);
+}
+
 static std::vector<unsigned char> ImageByteSwapped(int width, int height, const unsigned char *pixelsImage)
 {
 	// Input is RGBA, but Format_ARGB32 is BGRA, so swap the red bytes and blue bytes
diff --git a/qt/ScintillaEditBase/PlatQt.h b/qt/ScintillaEditBase/PlatQt.h
index ed51cf598..345538bb0 100644
--- a/qt/ScintillaEditBase/PlatQt.h
+++ b/qt/ScintillaEditBase/PlatQt.h
@@ -32,6 +32,11 @@ inline QColor QColorFromCA(ColourDesired ca)
 	return QColor(c & 0xff, (c >> 8) & 0xff, (c >> 16) & 0xff);
 }
 
+inline QColor QColorFromColourAlpha(ColourAlpha ca)
+{
+	return QColor(ca.GetRed(), ca.GetGreen(), ca.GetBlue(), ca.GetAlpha());
+}
+
 inline QRect QRectFromPRect(PRectangle pr)
 {
 	return QRect(pr.left, pr.top, pr.Width(), pr.Height());
@@ -92,6 +97,7 @@ public:
 		ColourDesired back) override;
 	void AlphaRectangle(PRectangle rc, int cornerSize, ColourDesired fill,
 		int alphaFill, ColourDesired outline, int alphaOutline, int flags) override;
+	void GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) override;
 	void DrawRGBAImage(PRectangle rc, int width, int height,
 		const unsigned char *pixelsImage) override;
 	void Ellipse(PRectangle rc, ColourDesired fore,