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When using parentHWND option, keyboard input doesn't work

Discussion in 'Editor & General Support' started by Virtualware, Oct 29, 2014.

  1. Virtualware

    Virtualware

    Joined:
    Sep 17, 2012
    Posts:
    75
    I've been testing the new parentHWND command line option that appeared in 4.5.5p1 using the reference example provided in the documentation page, but when I tried to use Input.GetKey it never triggered. Input.GetMouseButton works correctly, but I couldn't get keyboard input to work. I've tested it in Windows 8.1 x64 and Windows 7 x64.
    I know is a very recent feature, but it looked great and I'd love to use it.
    Any advice?
     
    Virtualware, Oct 29, 2014
    #1

  2. jariRG

    jariRG

    Joined:
    May 9, 2013
    Posts:
    1
    I have the same problem, mouse input works fine, but no keyboard input at all.
    Did you find a solution or workaround for this?
    Any official statement about this? Is it a bug, or missing something from the initialization on opener side?
     
    jariRG, Dec 5, 2014
    #2

  3. Dave-Hampson

    Dave-Hampson

    Unity Technologies

    Joined:
    Jan 2, 2014
    Posts:
    150
    I think you need to send WM_ACTIVATE
     
    Dave-Hampson, Jan 12, 2015
    #3
    GilCat likes this.

  4. Tomas1856

    Tomas1856

    Unity Technologies

    Joined:
    Sep 21, 2012
    Posts:
    3,920
    Adding to Dave answer, here's the updated Form1.cs

    Code (CSharp):
    1. using System;
    2. using System.Collections.Generic;
    3. using System.ComponentModel;
    4. using System.Data;
    5. using System.Drawing;
    6. using System.Linq;
    7. using System.Runtime.InteropServices;
    8. using System.Text;
    9. using System.Threading;
    10. using System.Windows.Forms;
    11. using System.Diagnostics;
    12. using System.Windows.Forms.VisualStyles;
    13.  
    14. namespace Container
    15. {
    16.     public partial class Form1 : Form
    17.     {
    18.         [DllImport("User32.dll")]
    19.         static extern bool MoveWindow(IntPtr handle, int x, int y, int width, int height, bool redraw);
    20.  
    21.         internal delegate int WindowEnumProc(IntPtr hwnd, IntPtr lparam);
    22.         [DllImport("user32.dll")]
    23.         internal static extern bool EnumChildWindows(IntPtr hwnd, WindowEnumProc func, IntPtr lParam);
    24.  
    25.         [DllImport("user32.dll")]
    26.         static extern int SendMessage(IntPtr hWnd, int msg, int wParam, uint lParam);
    27.  
    28.         private Process process;
    29.         private IntPtr unityHWND = IntPtr.Zero;
    30.  
    31.         private const int WM_ACTIVATE = 0x0006;
    32.         private const int WA_ACTIVE = 1;
    33.  
    34.         public Form1()
    35.         {
    36.             InitializeComponent();
    37.  
    38.             try
    39.             {
    40.                 process = new Process();
    41.                 process.StartInfo.FileName = "Child.exe";
    42.                 process.StartInfo.Arguments = "-parentHWND " + panel1.Handle.ToInt32() + " " + Environment.CommandLine;
    43.                 process.StartInfo.UseShellExecute = true;
    44.                 process.StartInfo.CreateNoWindow = true;
    45.  
    46.                 process.Start();
    47.  
    48.                 process.WaitForInputIdle();
    49.                 // Doesn't work for some reason ?!
    50.                 //unityHWND = process.MainWindowHandle;
    51.                 EnumChildWindows(panel1.Handle, WindowEnum, IntPtr.Zero);
    52.  
    53.                 unityHWNDLabel.Text = "Unity HWND: 0x" + unityHWND.ToString("X8");
    54.             }
    55.             catch (Exception ex)
    56.             {
    57.                 MessageBox.Show(ex.Message + ".\nCheck if Container.exe is placed next to Child.exe.");
    58.             }
    59.  
    60.         }
    61.         private int WindowEnum(IntPtr hwnd, IntPtr lparam)
    62.         {
    63.             unityHWND = hwnd;
    64.             SendMessage(unityHWND, WM_ACTIVATE, WA_ACTIVE, 0);
    65.             return 0;
    66.         }
    67.  
    68.         private void panel1_Resize(object sender, EventArgs e)
    69.         {
    70.             MoveWindow(unityHWND, 0, 0, panel1.Width, panel1.Height, true);
    71.             SendMessage(unityHWND, WM_ACTIVATE, WA_ACTIVE, 0);
    72.         }
    73.  
    74.         // Close Unity application
    75.         private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    76.         {
    77.             try
    78.             {
    79.                 process.CloseMainWindow();
    80.  
    81.                 Thread.Sleep(1000);
    82.                 while (process.HasExited == false)
    83.                     process.Kill();
    84.             }
    85.             catch (Exception)
    86.             {
    87.                
    88.             }
    89.         }
    90.     }
    91. }
    92.  
     
    Tomas1856, Jan 12, 2015
    #4
    r618, wisockijunior, Razia Mahmood and 2 others like this.

  5. Razia Mahmood

    Razia Mahmood

    Joined:
    Feb 2, 2015
    Posts:
    2
    Can you plz guide me how to pass data to the embedded Unity Exe from the Host WPF Application ?
     
    Razia Mahmood, May 29, 2015
    #5

  6. wisockijunior

    wisockijunior

    Joined:
    Jul 14, 2015
    Posts:
    1
    wisockijunior, Sep 13, 2015
    #6

  7. unity_FkbuTsvygonPag

    unity_FkbuTsvygonPag

    Joined:
    Jul 16, 2019
    Posts:
    1
    I had similar issue, this was caused by the line
    Code (CSharp):
    1. unityHWND = process.MainWindowHandle;
    I dont know why I uncommented it. Removed the line, works well.
     
    unity_FkbuTsvygonPag, Jul 29, 2019
    #7

  8. leduc232

    leduc232

    Joined:
    Dec 14, 2022
    Posts:
    3
    Still looking for a solution for this with the new input system. If anyone have one.
     
    leduc232, Dec 21, 2022
    #8

  9. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

    Joined:
    Jul 25, 2013
    Posts:
    10,680
    Tautvydas-Zilys, Dec 22, 2022
    #9