[LyX/master] Adjust selection color of delimiter icons

[Juergen Spitzmueller]

commit fa56a5eb98d8568b036d66b391735181d6c451a0
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Sun Feb 7 12:32:11 2021 +0100

    Adjust selection color of delimiter icons
---
 src/frontends/qt/GuiDelimiter.cpp |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/frontends/qt/GuiDelimiter.cpp b/src/frontends/qt/GuiDelimiter.cpp
index 9043974..5b23804 100644
--- a/src/frontends/qt/GuiDelimiter.cpp
+++ b/src/frontends/qt/GuiDelimiter.cpp
@@ -90,21 +90,27 @@ struct MathSymbol {
 };
 
 
-QPixmap getSelectedPixmap(QPixmap pixmap)
+QPixmap getSelectedPixmap(QPixmap pixmap, QSize const icon_size)
 {
 	QPalette palette = QPalette();
 	QColor text_color = (guiApp->isInDarkMode())
 			? palette.color(QPalette::Active, QPalette::WindowText)
 			: Qt::black;
 	QColor highlight_color = palette.color(QPalette::Active, QPalette::HighlightedText);
+	QColor highlight_bg = palette.color(QPalette::Active, QPalette::Highlight);
 
 	// create a layer with black text turned to QPalette::HighlightedText
 	QPixmap hl_overlay(pixmap.size());
 	hl_overlay.fill(highlight_color);
 	hl_overlay.setMask(pixmap.createMaskFromColor(text_color, Qt::MaskOutColor));
 
+	// Create highlighted background
+	QPixmap hl_background(icon_size);
+	hl_background.fill(highlight_bg);
+
 	// put layers on top of existing pixmap
 	QPainter painter(&pixmap);
+	painter.drawPixmap(pixmap.rect(), hl_background);
 	painter.drawPixmap(pixmap.rect(), hl_overlay);
 
 	return pixmap;
@@ -240,7 +246,7 @@ GuiDelimiter::GuiDelimiter(GuiView & lv)
 		// get pixmap with bullets
 		QPixmap pixmap = getPixmap("images/math/", toqstr(ms.icon), "svgz,png");
 		QIcon icon(pixmap);
-		icon.addPixmap(getSelectedPixmap(pixmap), QIcon::Selected);
+		icon.addPixmap(getSelectedPixmap(pixmap, icon_size), QIcon::Selected);
 		QListWidgetItem * lwi = new QListWidgetItem(icon, QString());
 		setDelimiterName(lwi, delim);
 		left_list_items_[ms.unicode] = lwi;