Tag Archives: NGUI

Custom Inspector: Mixing custom drawer and default property drawers

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I’ve been playing around with ScriptableObjects and using them to define parameters for my Dialog display gameobject.  In previous instances, I’d just use constant strings and pass them to the function that creates and displays the dialog.  After reading about ScriptableObjects, I decided to give them a shot to build strings for the dialogs.

Everything was great, except for the inspector displaying long strings.  They just get truncated of the right side of the display.  The behavior exhibited by the NGUI UILabel inspector is much better, as any text to long to be displayed in the inspector is wrapped and the field is extended vertically.

I found the NGUI code in UILabelInspector that handles the displaying of strings across multiple lines, and took a copy to use in my own inspector.  Then I realized, with a custom inspector I have to display all the properties myself, and I didn’t want to (a) write a custom display for each property type, and (b) remember to extend the inspector anytime I modified my ScriptableObject class.

The second problem was solved by iterating over the SerializedProperties contained in the SerializedObject, while the first problem was solved by calling EditorGui.PropertyField on SerializedProperties I didn’t want to display myself.

I then added an exception for the ‘Script’ property, to make it non-editable.

This resulted in the code below:

public override void OnInspectorGUI()
{
	serializedObject.Update();
	SerializedProperty sp = serializedObject.GetIterator();
	if (!sp.NextVisible(true))
		sp = null;
	while (sp!=null)
	{
		if (sp.type == "string")
			DrawMultiLineString(sp.name);
		else
		{
			Rect position = EditorGUILayout.GetControlRect(GUILayout.Height(EditorGUI.GetPropertyHeight(sp)));
			if (sp.name == "m_Script")
			{
				EditorGUI.BeginDisabledGroup(true);
				EditorGUI.PropertyField(position, sp, new GUIContent(sp.displayName), true);
				EditorGUI.EndDisabledGroup();
			}
			else
				EditorGUI.PropertyField(position, sp, new GUIContent(sp.displayName), true);
		}
		if (!sp.NextVisible(true))
			sp = null;
	}
	serializedObject.ApplyModifiedProperties();
}

The call to DrawMultiLineString uses code directly from NGUI’s UILabelInspector, and is not available unless you have NGUI for Unity.

Non-breaking space in Unity3D/NGUI

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I was messing with some text line wrapping an an app today, and needed to stop NGUI inserting a line break between a number and a label in a long string.  Using the escape sequence ‘\u00A0’ did the trick.

return category + "\u00A0#" + indexInCategory;

Now the last word in the string category and the number preceded with a # stay on the same line!

Note: I read that pressing ALT-Space on the Mac will insert this character.  It may do that, but MonoDevelop/NGUI don’t seem to care.  The escape literal worked, the ALT-Space just acted like a regular space.

Note: To insert a non-breaking space in a XML document without using Document Entities, use the following:  

Unity3D Application.persistentDataPath is null on Android

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I’ve no idea why this is happening all of a sudden, but the static property Application.persistentDataPath is returning a zero length string and not the path to the storage folder on my Android devices.  From googling, I can see I’m not the only one with this problem.  It’s happening whether I build directly from Unity, or download it from the beta tab on Google Play.

I added the following method to my Android plugin JAR so at least I could move on and not get stuck:

    public static String PBgetFilePath(final Activity activity)
    {
        File path = activity.getApplicationContext().getFilesDir();
        Log.i(LOGTAG,"Internal FilesDir: " + path.getPath());
        return path.getPath();
    }

This returns the correct string and when I use it, I can read and write files as expected.  If persistentDataPath returns a null or a zero length string, then I call my java code and use the result.