Added new widgets: YMenuBar, YItemSelector

[shundhammer]

This adds the new widgets that were added to libyui in recent months to the bindings:

• YMenuBar https://github.com/libyui/libyui/pull/169
• YItemSelector https://github.com/libyui/libyui/pull/152

This was requested by @anaselli so they can finally migrate from the MGAMenuBar to this new common YMenuBar.

Please notice that I don't know much about SWIG bindings; I just added lines that were similar to existing ones (YMenuButton).

Most of YMenuButton is now in a new base class YMenuWidget that is also inherited by YMenuBar, so both widgets share the parts that might be sensitive (addItem( YWidget *item_disown )).

YItemSelector is another YSelectionWidget that also heavily relies on its base class; I don't expect any trouble there.

---

@dmulder : I was told you are interested in this package from the SUSE side. Can you have a look at this PR?

[dmulder]

@shundhammer looks ok to me.

[shundhammer]

@dmulder : Thanks!

[anaselli]

You could also add this python example under swig/python/examples

[mvidner]

I have a build fix for the Travis failure...

[mvidner]

@shundhammer please cherry pick 2abc86f

(and if you in the future make PRs from a branch in the main repo instead of from your fork, I will be able to simply add the commit instead of bothering you to do it)

[mvidner]

@anaselli I have added your example, but it has not worked for me until I applied the fix below. The runtime error was

self.menubar.resolveShortcutConflicts()
AttributeError: 'YMenuBar' object has no attribute 'resolveShortcutConflicts'

and swig 4.0.2 was saying at compile time

/usr/include/yui/YMenuBar.h:50: Warning 401: Base class 'YMenuWidget' undefined.
/usr/include/yui/YMenuWidget.h:39: Warning 401: 'YMenuWidget' must be defined before it is used as a base class.

I wonder if you've seen this.

Fix:

diff --git a/swig/yui.i b/swig/yui.i
index b90a336..55b3878 100644
--- a/swig/yui.i
+++ b/swig/yui.i
@@ -66,10 +66,10 @@ SWIGEXPORT void Init__yui(void) {
 #include "yui/YMacro.h"
 #include "yui/YMacroPlayer.h"
 #include "yui/YMacroRecorder.h"
+#include "yui/YMenuWidget.h"
 #include "yui/YMenuBar.h"
 #include "yui/YMenuButton.h"
 #include "yui/YMenuItem.h"
-#include "yui/YMenuWidget.h"
 #include "yui/YMultiLineEdit.h"
 #include "yui/YMultiProgressMeter.h"
 #include "yui/YMultiSelectionBox.h"
@@ -224,10 +224,10 @@ class Exception;
 %include yui/YMacro.h
 %include yui/YMacroPlayer.h
 %include yui/YMacroRecorder.h
+%include yui/YMenuWidget.h
 %include yui/YMenuBar.h
 %include yui/YMenuButton.h
 %include yui/YMenuItem.h
-%include yui/YMenuWidget.h
 %include yui/YMultiLineEdit.h
 %include yui/YMultiProgressMeter.h
 %include yui/YMultiSelectionBox.h

[anaselli]

@mvidner yes i wrote for those missing entries in my review comments...