Show tooltips with the error messages.

src/plugins/glsleditor/glsleditorplugin.cpp

@@ -33,6 +33,7 @@
 #include "glsleditorfactory.h"
 #include "glslcodecompletion.h"
 #include "glslfilewizard.h"
+#include "glslhoverhandler.h"
 
 #include <coreplugin/icore.h>
 #include <coreplugin/coreconstants.h>
@@ -104,6 +105,8 @@ bool GLSLEditorPlugin::initialize(const QStringList & /*arguments*/, QString *er
 //    m_modelManager = new ModelManager(this);
 //    addAutoReleasedObject(m_modelManager);
 
+    addAutoReleasedObject(new GLSLHoverHandler(this));
+
     Core::Context context(GLSLEditor::Constants::C_GLSLEDITOR_ID);
 
     m_editor = new GLSLEditorFactory(this);