Unfloat: Add documentation for new classes

Change-Id: Id7c8d5eb7f865db5db82beffe96dab605d8ae36f
Reviewed-on: https://gerrit.libreoffice.org/65941Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Tested-by: Tamás Zolnai <tamas.zolnai@collabora.com>

sw/source/uibase/inc/FloatingTableButton.hxx

@@ -13,6 +13,16 @@
 #include "FrameControl.hxx"
 #include <vcl/menubtn.hxx>
 
+
+/** Class for unfloat table button
+ *
+ * This unfloat button is used to convert a floating table into a simple writer table embedded to the text body.
+ * This unfloat oparation is useful typically for documents imported from MSO file formats containing
+ * multi-page floating tables. In case of a multi-page table the text frame cuts off the table because
+ * the frame can't span across multiple pages. With unfloating we can get a multi-page table without
+ * floating properties.
+ *
+ */
 class FloatingTableButton : public SwFrameMenuButtonBase
 {
     OUString m_sLabel;

sw/source/uibase/inc/HeaderFooterWin.hxx

@@ -15,6 +15,10 @@
 #include <vcl/timer.hxx>
 #include <drawinglayer/primitive2d/baseprimitive2d.hxx>
 
+/**
+ *  Button painter helper class used to paint a runtime button positioned to a writer frame.
+ *  See header/footer button.
+ */
 class SwFrameButtonPainter
 {
 public: