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EditorWindow.OnFocus()

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Description

Called when the window gets keyboard focus.

See Also: OnLostFocus.


Preview your camera in orthographic mode when you select the window.

// Simple script that lets you preview your main camera in
// Orthographic view when selected.

using UnityEngine;
using UnityEditor;

public class ExampleClass : EditorWindow
{
    RenderTexture renderTexture;
    Camera camera;

    [MenuItem("Examples/Orthographic Previewer")]
    static void Init()
    {
        ExampleClass window =
            (ExampleClass)EditorWindow.GetWindow(typeof(ExampleClass), true, "My Empty Window");
        window.Show();
    }

    void OnEnable()
    {
        int w = (int)this.position.width;
        int h = (int)this.position.height;

        renderTexture = new RenderTexture(w, h, 32, RenderTextureFormat.ARGB32);
        camera = Camera.main;
    }

    void OnInspectorUpdate()
    {
        this.Repaint();
    }

    void OnGUI()
    {
        if (GUILayout.Button("Close"))
        {
            camera.orthographic = false;
            this.Close();
        }
        if (renderTexture != null)
        {
            float w = this.position.width;
            float h = this.position.height;
            GUI.DrawTexture(new Rect(0.0f, 50.0f, w, h), renderTexture);
        }
    }

    void OnFocus()
    {
        Selection.activeTransform = camera.transform;
        camera.orthographic = true;
    }

    void Update()
    {
        if (camera != null)
        {
            camera.targetTexture = renderTexture;
            camera.Render();
            camera.targetTexture = null;
        }

        int w = (int)this.position.width;
        int h = (int)this.position.height;
        if (renderTexture.width != w || renderTexture.height != h)
        {
            renderTexture = new RenderTexture(w, h, 32, RenderTextureFormat.ARGB32);
        }
    }

    void OnLostFocus()
    {
        camera.orthographic = false;
    }
}

Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.

Copyright © 2020 Unity Technologies. Publication Date: 2020-06-05.
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