Manually set ControlID to built-in controls ?

Questions & Answers
1

Is there a way to manually set a controlID to one of Unity’s built-in controls (i.e. Buttons, text fields, etc) ?

I am writing a custom control that behave like a normal label when not focused and switch to a text field when I detect a mouse click. Problem is, if I use GUI/EditorGUI.TextField(…), they internally set GUIUtility.hotControl and I lose my custom control’s focus.

My code looks like this for now :

public static string EditableLabel(Rect position, string label)
{
    int controlId = GUIUtility.GetControlID(GUIHashes.EditableLabel, FocusType.Keyboard, position);
    EditorGUIUtility.AddCursorRect(position, MouseCursor.Text, controlId);
    GUI.SetNextControlName("EditableLabel");
    switch(Event.current.GetTypeForControl(controlId))
    {
        case EventType.Repaint:
    		if(GUIUtility.hotControl == controlId)
    			label = GUI.TextArea(position, label);
    		else
    			GUI.Label(position, label, Styles.LabelBoldItalicStyle);
    		break;
    	case EventType.MouseDown :
    		if(Event.current.button == 0 && position.Contains(Event.current.mousePosition))
    		{
    			GUIUtility.hotControl = controlId;
    			EditorGUI.FocusTextInControl("EditableLabel");
    		}
    		break;
    	case EventType.MouseUp:
    		if(Event.current.button == 0 && GUIUtility.hotControl == controlId)
    		{
    			GUIUtility.hotControl = 0;
    			GUIUtility.keyboardControl = 0;
    		}
    		break;
    }
    return label;
}

I’m making tools right now and the lack of IMGUI solid documention is seriously hindering…

2

So far, I prefer the technique of accessing GUI.DoTextField(…) through reflection, and mimic GUI.TextField(…) with the appropriate changes.

Just checking: you’re using ILSpy to analyze UnityEngine.dll and UnityEditor.dll, right? It’s super handy in these situations.

Here’s some code I found with ILSpy.

// UnityEngine.GUI
public static string TextField(Rect position, string text, int maxLength, GUIStyle style)
{
	GUIContent gUIContent = GUIContent.Temp(text);
	GUI.DoTextField(position, GUIUtility.GetControlID(FocusType.Keyboard, position), gUIContent, false, maxLength, style);
	return gUIContent.text;
}