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#if UNITY_EDITOR
using System;
using System.Reflection;
using UnityEditor;
using UnityEngine;
public static class WindowHelper
{
private class R_EditorWindow
{
private EditorWindow m_instance;
private System.Type m_type;
public R_EditorWindow( EditorWindow instance )
{
m_instance = instance;
m_type = instance.GetType();
}
public object Parent
{
get
{
var field = m_type.GetField( "m_Parent", BindingFlags.Instance | BindingFlags.NonPublic );
return field.GetValue( m_instance );
}
}
public object Docked
{
get
{
var property = m_type.GetProperty( "docked", BindingFlags.Instance | BindingFlags.NonPublic );
return property.GetValue( m_instance, null );
}
}
}
private class R_DockArea
{
private object m_instance;
private System.Type m_type;
public R_DockArea( object instance )
{
m_instance = instance;
m_type = instance.GetType();
}
public object Window
{
get
{
var property = m_type.GetProperty( "window", BindingFlags.Instance | BindingFlags.Public );
return property.GetValue( m_instance, null );
}
}
public object ActualView
{
get
{
var field = m_type.GetField( "m_ActualView", BindingFlags.Instance | BindingFlags.NonPublic );
return field.GetValue( m_instance );
}
}
public object OriginalDragSource
{
set
{
var field = m_type.GetField( "s_OriginalDragSource", BindingFlags.Static | BindingFlags.NonPublic );
field.SetValue( null, value );
}
}
public void AddTab( EditorWindow pane )
{
#if UNITY_2018_3_OR_NEWER
var method = m_type.GetMethod( "AddTab", BindingFlags.Instance | BindingFlags.Public, null, new System.Type[] { typeof( EditorWindow ), typeof( bool ) }, null );
method.Invoke( m_instance, new object[] { pane, true } );
#else
var method = m_type.GetMethod( "AddTab", BindingFlags.Instance | BindingFlags.Public, null, new System.Type[] { typeof( EditorWindow ) }, null );
method.Invoke( m_instance, new object[] { pane } );
#endif
}
public void RemoveTab( EditorWindow pane )
{
var method = m_type.GetMethod( "RemoveTab", BindingFlags.Instance | BindingFlags.Public, null, new System.Type[] { typeof( EditorWindow ) }, null );
method.Invoke( m_instance, new object[] { pane } );
}
}
private class R_ContainerWindow
{
private object m_instance;
private System.Type m_type;
public R_ContainerWindow( object instance )
{
m_instance = instance;
m_type = instance.GetType();
}
public object RootSplitView
{
get
{
var property = m_type.GetProperty( "rootSplitView", BindingFlags.Instance | BindingFlags.Public );
return property.GetValue( m_instance, null );
}
}
public object RootView
{
get
{
var property = m_type.GetProperty( "rootView", BindingFlags.Instance | BindingFlags.Public );
return property.GetValue( m_instance, null );
}
}
public object WindowPtr
{
get
{
var all = m_type.GetNestedTypes();
foreach( var item in all )
{
Debug.Log( item.Name );
}
var property = m_type.GetField( "m_WindowPtr", BindingFlags.Instance | BindingFlags.NonPublic );
return property.GetValue( m_instance );
}
}
}
private class R_SplitView
{
private object m_instance;
private System.Type m_type;
public R_SplitView( object instance )
{
m_instance = instance;
m_type = instance.GetType();
}
public object DragOver( EditorWindow child, Vector2 screenPoint )
{
var method = m_type.GetMethod( "DragOver", BindingFlags.Instance | BindingFlags.Public );
return method.Invoke( m_instance, new object[] { child, screenPoint } );
}
public void PerformDrop( EditorWindow child, object dropInfo, Vector2 screenPoint )
{
var method = m_type.GetMethod( "PerformDrop", BindingFlags.Instance | BindingFlags.Public );
method.Invoke( m_instance, new object[] { child, dropInfo, screenPoint } );
}
}
public enum DockPosition
{
Left,
Top,
Right,
Bottom
}
public static bool IsDocked( this EditorWindow wnd )
{
var parent = new R_EditorWindow( wnd );
return (bool)parent.Docked;
}
public static void Undock( this EditorWindow wnd )
{
var parent = new R_EditorWindow( wnd );
var dockArea = new R_DockArea( parent.Parent );
dockArea.RemoveTab( wnd );
wnd.Show( true );
}
public static void RemoveTab( this EditorWindow wnd )
{
var parent = new R_EditorWindow( wnd );
var dockArea = new R_DockArea( parent.Parent );
dockArea.RemoveTab( wnd );
}
/// <summary>
/// Docks the second window to the first window at the given position
/// </summary>
public static void Dock( this EditorWindow wnd, EditorWindow other, DockPosition position )
{
var mousePosition = GetFakeMousePosition( wnd, position );
var parent = new R_EditorWindow( wnd );
var child = new R_EditorWindow( other );
var dockArea = new R_DockArea( parent.Parent );
var containerWindow = new R_ContainerWindow( dockArea.Window );
var splitView = new R_SplitView( containerWindow.RootSplitView );
var dropInfo = splitView.DragOver( other, mousePosition );
dockArea.OriginalDragSource = child.Parent;
splitView.PerformDrop( other, dropInfo, mousePosition );
}
/// <summary>
/// Adds the the second window as a tab at the end of the first window tab list
/// </summary>
/// <param name="existingWindow"></param>
/// <param name="newWindow"></param>
public static void AddTab( this EditorWindow existingWindow, EditorWindow newWindow )
{
var parent = new R_EditorWindow( existingWindow );
var child = new R_EditorWindow( newWindow );
var dockArea = new R_DockArea( parent.Parent );
dockArea.OriginalDragSource = child.Parent;
dockArea.AddTab( newWindow );
}
private static Vector2 GetFakeMousePosition( EditorWindow wnd, DockPosition position )
{
Vector2 mousePosition = Vector2.zero;
// The 20 is required to make the docking work.
// Smaller values might not work when faking the mouse position.
switch ( position )
{
case DockPosition.Left:
mousePosition = new Vector2( 20, wnd.position.size.y / 2 );
break;
case DockPosition.Top:
mousePosition = new Vector2( wnd.position.size.x / 2, 20 );
break;
case DockPosition.Right:
mousePosition = new Vector2( wnd.position.size.x - 20, wnd.position.size.y / 2 );
break;
case DockPosition.Bottom:
mousePosition = new Vector2( wnd.position.size.x / 2, wnd.position.size.y - 20 );
break;
}
return GUIUtility.GUIToScreenPoint( mousePosition );
}
}
#endif
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