From 8826dca1066361b474139bcc5aeed2e3a5246ed0 Mon Sep 17 00:00:00 2001
From: Matthias Melcher <github@matthiasm.com>
Date: Thu, 5 Jan 2023 13:51:30 +0100
Subject: Add close buttons for individual tabs in Fl_Tabs (#628)

Add close buttons for Fl_Tabs
Introducing callback reasons
FLUID shows all FL_WHEN_... options
Adding Fl_Tabs overflow types
Improved test/tabs to show new features
---
 src/Fl_Button.cxx | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

(limited to 'src/Fl_Button.cxx')

diff --git a/src/Fl_Button.cxx b/src/Fl_Button.cxx
index 1651d08f5..dec92d483 100644
--- a/src/Fl_Button.cxx
+++ b/src/Fl_Button.cxx
@@ -100,12 +100,12 @@ int Fl_Button::handle(int event) {
       value_ = newval;
       set_changed();
       redraw();
-      if (when() & FL_WHEN_CHANGED) do_callback();
+      if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
     }
     return 1;
   case FL_RELEASE:
     if (value_ == oldval) {
-      if (when() & FL_WHEN_NOT_CHANGED) do_callback();
+      if (when() & FL_WHEN_NOT_CHANGED) do_callback(FL_REASON_SELECTED);
       return 1;
     }
     set_changed();
@@ -116,11 +116,11 @@ int Fl_Button::handle(int event) {
       set_changed();
       if (when() & FL_WHEN_CHANGED) {
         Fl_Widget_Tracker wp(this);
-        do_callback();
+        do_callback(FL_REASON_CHANGED);
         if (wp.deleted()) return 1;
       }
     }
-    if (when() & FL_WHEN_RELEASE) do_callback();
+    if (when() & FL_WHEN_RELEASE) do_callback(FL_REASON_RELEASED);
     return 1;
   case FL_SHORTCUT:
     if (!(shortcut() ?
@@ -150,16 +150,16 @@ int Fl_Button::handle(int event) {
       if (type() == FL_RADIO_BUTTON) {
         if (!value_) {
           setonly();
-          if (when() & FL_WHEN_CHANGED) do_callback();
+          if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
         }
       } else if (type() == FL_TOGGLE_BUTTON) {
         value(!value());
-        if (when() & FL_WHEN_CHANGED) do_callback();
+        if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
       } else {
         simulate_key_action();
       }
       if (wp.deleted()) return 1;
-      if (when() & FL_WHEN_RELEASE) do_callback();
+      if (when() & FL_WHEN_RELEASE) do_callback(FL_REASON_RELEASED);
       return 1;
     }
     /* FALLTHROUGH */
@@ -206,6 +206,11 @@ void Fl_Button::key_release_timeout(void *d)
 
   Derived classes may handle this differently.
 
+  A button may reequest callbacks with \p whne() \p FL_WHEN_CHANGED,
+  \p FL_WHEN_NOT_CHANGED, and \p FL_WHEN_RELEASE, triggering the callback
+  reasons \p FL_REASON_CHANGED, \p FL_REASON_SELECTED,
+  and \p FL_REASON_DESELECTED.
+
   \param[in] X, Y, W, H position and size of the widget
   \param[in] L widget label, default is no label
  */
-- 
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