GUILayout.MaxWidth

Description

Option passed to a control to specify a maximum width.

Maximum allowed width for a window.

    // Draws a window you can resize between 80px and 200px width
    // Just click the box inside the window and move your mouse
    private var windowRect : Rect = Rect (10, 10, 100, 100);
    private var scaling : boolean = false;

    function OnGUI () {
        windowRect = GUILayout.Window (0, windowRect, ScalingWindow, "resizeable",
                           GUILayout.MinWidth(80), GUILayout.MaxWidth(200));
    }

    function ScalingWindow (windowID : int) {
        GUILayout.Box("", GUILayout.Width(20), GUILayout.Height(20));
        if (Event.current.type == EventType.MouseUp) {
            scaling = false;
        }
        else if (Event.current.type == EventType.MouseDown &&
             GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition)) {
            scaling = true;
        }

        if (scaling) {
            windowRect = Rect (windowRect.x, windowRect.y,
                   windowRect.width + Event.current.delta.x, windowRect.height + Event.current.delta.y);
        }
    }

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    private Rect windowRect = new Rect(10, 10, 100, 100);
    private bool scaling = false;
    void OnGUI() {
        windowRect = GUILayout.Window(0, windowRect, ScalingWindow, "resizeable", GUILayout.MinWidth(80), GUILayout.MaxWidth(200));
    }
    void ScalingWindow(int windowID) {
        GUILayout.Box("", GUILayout.Width(20), GUILayout.Height(20));
        if (Event.current.type == EventType.MouseUp)
            scaling = false;
        else
            if (Event.current.type == EventType.MouseDown && GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition))
                scaling = true;
            
        if (scaling)
            windowRect = new Rect(windowRect.x, windowRect.y, windowRect.width + Event.current.delta.x, windowRect.height + Event.current.delta.y);
        
    }
}