Add RAII listener blocking utility

* Added for ToolPanel listener and Adjuster
* Follows style of ConnectionBlocker for sigc::connection

rtgui/guiutils.cc

@@ -25,6 +25,8 @@
 #include "rtimage.h"
 #include "rtscalable.h"
 #include "multilangmgr.h"
+#include "adjuster.h"
+#include "toolpanel.h"
 
 #include <assert.h>
 
@@ -77,6 +79,34 @@ void IdleRegister::destroy()
     mutex.unlock();
 }
 
+BlockAdjusterEvents::BlockAdjusterEvents(Adjuster* adjuster) : adj(adjuster)
+{
+    if (adj) {
+        adj->block(true);
+    }
+}
+
+BlockAdjusterEvents::~BlockAdjusterEvents()
+{
+    if (adj) {
+        adj->block(false);
+    }
+}
+
+DisableListener::DisableListener(ToolPanel* panelToDisable) : panel(panelToDisable)
+{
+    if (panel) {
+        panel->disableListener();
+    }
+}
+
+DisableListener::~DisableListener()
+{
+    if (panel) {
+        panel->enableListener();
+    }
+}
+
 Glib::ustring escapeHtmlChars(const Glib::ustring &src)
 {
 

rtgui/guiutils.h

@@ -45,7 +45,9 @@ struct CropParams;
 
 }
 
+class Adjuster;
 class RTImage;
+class ToolPanel;
 
 Glib::ustring escapeHtmlChars(const Glib::ustring &src);
 bool removeIfThere (Gtk::Container* cont, Gtk::Widget* w, bool increference = true);
@@ -161,6 +163,26 @@ private:
     bool wasBlocked;
 };
 
+class BlockAdjusterEvents
+{
+public:
+    explicit BlockAdjusterEvents(Adjuster* adjuster);
+    ~BlockAdjusterEvents();
+
+private:
+    Adjuster* adj;
+};
+
+class DisableListener
+{
+public:
+    explicit DisableListener(ToolPanel* panelToDisable);
+    ~DisableListener();
+
+private:
+    ToolPanel* panel;
+};
+
 /**
  * @brief Glue box to control visibility of the MyExpender's content ; also handle the frame around it
  */