From 618e6f3feea3abc6edb382cc12ac3a9278b25af8 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Tue, 26 Oct 2021 13:45:38 +0200
Subject: [PATCH] pgui: Fix slider thumb entering dragging state on button
 press

This caused updating the slider while a button is pressed and the mouse is held over the thumb not to work.

Fixes #1188
---
 panda/src/pgui/pgSliderBar.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/panda/src/pgui/pgSliderBar.cxx b/panda/src/pgui/pgSliderBar.cxx
index e666d2a496..d423549ccb 100644
--- a/panda/src/pgui/pgSliderBar.cxx
+++ b/panda/src/pgui/pgSliderBar.cxx
@@ -605,8 +605,10 @@ item_press(PGItem *item, const MouseWatcherParameter &param) {
       ClockObject::get_global_clock()->get_frame_time() + scroll_initial_delay;
 
   } else if (item == _thumb_button) {
-    _scroll_button_held = nullptr;
-    begin_drag();
+    if (((PGButton *)item)->has_click_button(param.get_button())) {
+      _scroll_button_held = nullptr;
+      begin_drag();
+    }
   }
 }