From 3065771b2c50a409d904b830f4232655023b4b12 Mon Sep 17 00:00:00 2001
From: "chunmao.guo" <chunmao.guo@bambulab.com>
Date: Mon, 6 Feb 2023 10:47:53 +0800
Subject: [PATCH] FIX: [STUDIO-1746] transparent background for images of
 swtich button

Change-Id: I30012a756242816a69099d211bea444bebc4277d
(cherry picked from commit b1efb320cc4290406001994d45b0ef182d6cce30)
---
 src/slic3r/GUI/Widgets/SwitchButton.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/slic3r/GUI/Widgets/SwitchButton.cpp b/src/slic3r/GUI/Widgets/SwitchButton.cpp
index a0b03ced59..3dc182032f 100644
--- a/src/slic3r/GUI/Widgets/SwitchButton.cpp
+++ b/src/slic3r/GUI/Widgets/SwitchButton.cpp
@@ -100,10 +100,18 @@ void SwitchButton::Rescale()
 		}
 		for (int i = 0; i < 2; ++i) {
 			wxMemoryDC memdc(&dc);
+#ifdef __WXMSW__
 			wxBitmap bmp(trackSize.x, trackSize.y);
 			memdc.SelectObject(bmp);
 			memdc.SetBackground(wxBrush(GetBackgroundColour()));
 			memdc.Clear();
+#else
+            wxImage image(trackSize);
+            image.InitAlpha();
+            memset(image.GetAlpha(), 0, trackSize.GetWidth() * trackSize.GetHeight());
+            wxBitmap bmp(std::move(image));
+            memdc.SelectObject(bmp);
+#endif
             memdc.SetFont(dc.GetFont());
 			auto state = i == 0 ? StateColor::Enabled : (StateColor::Checked | StateColor::Enabled);
             {