Popup.cs bombing-out on me.

Unity Engine
1

Hi,

I just tried to use the Popup.cs (put into standard assets/scripts folder) along with the PopupListUsageExample.js but it kept crashing unity.

I made a scene from scratch with only an empty game object and the example script attached. It’s still just crashing unity when I try to click the button/menu (no dropdown).

anyone know what’s wrong?

(I have no other code in the scene)

2

Can you post your code. It will us help you. :smiley:

3

I’m using the code straight from the wiki. I changed GUIContent text and added an Application.OpenURL.

using UnityEngine;


public class Popup {
    static int popupListHash = "PopupList".GetHashCode();
   
    public static bool List (Rect position, ref bool showList, ref int listEntry, GUIContent buttonContent, GUIContent[] listContent,
                             GUIStyle listStyle) {
        return List(position, ref showList, ref listEntry, buttonContent, listContent, "button", "box", listStyle);
    }
   
    public static bool List (Rect position, ref bool showList, ref int listEntry, GUIContent buttonContent, GUIContent[] listContent,
                             GUIStyle buttonStyle, GUIStyle boxStyle, GUIStyle listStyle) {
        int controlID = GUIUtility.GetControlID(popupListHash, FocusType.Passive);
        bool done = false;
        switch (Event.current.GetTypeForControl(controlID)) {
            case EventType.mouseDown:
                if (position.Contains(Event.current.mousePosition)) {
                    GUIUtility.hotControl = controlID;
                    showList = true;
                }
                break;
            case EventType.mouseUp:
                if (showList) {
                    done = true;
                }
                break;
        }
       
        GUI.Label(position, buttonContent, buttonStyle);
        if (showList) {
            Rect listRect = new Rect(position.x, position.y, position.width, listStyle.CalcHeight(listContent[0], 1.0f)*listContent.Length);
            GUI.Box(listRect, "", boxStyle);
            listEntry = GUI.SelectionGrid(listRect, listEntry, listContent, 1, listStyle);
        }
        if (done) {
            showList = false;
        }
        return done;
    }
}

and the example code

private var showList = false;

private var listEntry = 0;
private var list : GUIContent[];
private var listStyle : GUIStyle;
private var picked = false;

function Start () {
    // Make some content for the popup list
    list = new GUIContent[5];
    list[0] = new GUIContent("ROTATE: LMB");
    list[1] = new GUIContent("ZOOM: SHIFT + LMB");
    list[2] = new GUIContent("SELECT:  DBL-CLICK");
    list[3] = new GUIContent("RESET: DBL-CLICK");

    // Make a GUIStyle that has a solid white hover/onHover background to indicate highlighted items
    listStyle = new GUIStyle();
    listStyle.normal.textColor = Color.white;
    var tex = new Texture2D(2, 2);
    listStyle.hover.background = tex;
    listStyle.onHover.background = tex;
    listStyle.padding.left = listStyle.padding.right = listStyle.padding.top = listStyle.padding.bottom = 4;
	

}

function OnGUI () {
    if (Popup.List (Rect(50, 100, 100, 20), showList, listEntry, GUIContent("Navigation"), list, listStyle)) {
        picked = true;
    }
    if (picked) {
        GUI.Label (Rect(50, 70, 400, 20), "You picked " + list[listEntry].text + "!");
    }
	
	if (GUI.Button(Rect(800,40,20,20),"I"))
	{
	//Application.OpenURL ();
	}
	
}
4

Ugh. I think it’s because I deleted one of the menu options, so the 5th element of the declared list array isn’t defined. Though Unity crashes instead of giving an error.

5

What happens if you put back the deleted line? Does it still crash?

6

No. It’s working fine now. Thanks.