Mark the current argument.

src/libs/glsl/glsltypes.cpp

@@ -362,7 +362,13 @@ bool Struct::isLessThan(const Type *other) const
     return false;
 }
 
+
 QString Function::toString() const
+{
+    return prettyPrint(-1);
+}
+
+QString Function::prettyPrint(int currentArgument) const
 {
     QString proto;
     proto += _returnType->toString();
@@ -372,10 +378,14 @@ QString Function::toString() const
     for (int i = 0; i < _arguments.size(); ++i) {
         if (i != 0)
             proto += QLatin1String(", ");
+        if (currentArgument == i)
+            proto += QLatin1String("<b>");
         Argument *arg = _arguments.at(i);
         proto += arg->type()->toString();
         proto += QLatin1Char(' ');
         proto += arg->name();
+        if (currentArgument == i)
+            proto += QLatin1String("</b>");
     }
     proto += QLatin1Char(')');
     return proto;

src/libs/glsl/glsltypes.h

@@ -225,6 +225,7 @@ public:
     Argument *argumentAt(int index) const;
 
     // as Type
+    QString prettyPrint(int currentArgument) const;
     virtual QString toString() const;
     virtual const Function *asFunctionType() const { return this; }
     virtual bool isEqualTo(const Type *other) const;

src/plugins/glsleditor/glslcodecompletion.cpp

@@ -469,7 +469,7 @@ bool FunctionArgumentWidget::eventFilter(QObject *obj, QEvent *e)
 
 void FunctionArgumentWidget::updateHintText()
 {
-    setText(currentFunction()->toString());
+    setText(currentFunction()->prettyPrint(m_currentarg));
 
     m_numberLabel->setText(tr("%1 of %2").arg(m_current + 1).arg(m_items.size()));