LibGUI: Add an "exclusive" property to GAbstractButtons.

This makes checkable buttons exclusive with other checkable buttons in the
same parent widget. Basically like radio buttons. This should probably be
used to implement GRadioButton once it's a bit more mature.

1 files changed, 2 insertions, 0 deletions

diff --git a/LibGUI/GButton.cpp b/LibGUI/GButton.cpp
index 21b9f39043..6528131215 100644
--- a/LibGUI/GButton.cpp
+++ b/LibGUI/GButton.cpp
@@ -60,6 +60,8 @@ void GButton::click()
 {
     if (!is_enabled())
         return;
+    if (is_checkable())
+        set_checked(!is_checked());
     if (on_click)
         on_click(*this);
 }