added ComboBox::showEditor() method

src/juce_appframework/gui/components/controls/juce_ComboBox.cpp

@@ -81,7 +81,7 @@ void ComboBox::setEditableText (const bool isEditable)
 
 bool ComboBox::isTextEditable() const throw()
 {
-    return label->isEditableOnDoubleClick() || label->isEditableOnSingleClick();
+    return label->isEditable();
 }
 
 void ComboBox::setJustificationType (const Justification& justification) throw()
@@ -376,6 +376,13 @@ void ComboBox::setText (const String& newText,
     repaint();
 }
 
+void ComboBox::showEditor()
+{
+    jassert (isTextEditable()); // you probably shouldn't do this to a non-editable combo box?
+
+    label->showEditor();
+}
+
 //==============================================================================
 void ComboBox::setTextWhenNothingSelected (const String& newMessage) throw()
 {

src/juce_appframework/gui/components/controls/juce_ComboBox.h

@@ -264,6 +264,13 @@ public:
     void setText (const String& newText,
                   const bool dontSendChangeMessage = false) throw();
 
+    /** Programmatically opens the text editor to allow the user to edit the current item.
+
+        This is the same effect as when the box is clicked-on.
+        @see Label::showEditor();
+    */
+    void showEditor();
+
     //==============================================================================
     /** Registers a listener that will be called when the box's content changes. */
     void addListener (ComboBoxListener* const listener) throw();