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UI loses control when displaying message (error or warning)

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    #1

    UI loses control when displaying message (error or warning)

    I created 3 applications that performs the same processing: "Load a family in revit"

    #1 FormElementHost (windows form + usercontrol wpf elementhost) : (lose focus)
    #2 FormNoElementHost (windows form) : (not lose focus)
    #3 WindowWPF (Window) : (lose focus)

    Even if I use an ElementHost to host a usercontrol wpf in which there is a wpf button, the focus does not work in the windows form (case #1)

    Link of video with the 3 examples
    Link project visual studio (addin revit + family 2015/2016/2017)
    Link forum revit api


    1)FormElementHost (windows form + usercontrol wpf elementhost) : (lose focus)
    -Command:
    Code:
    [Transaction(TransactionMode.Manual)]
        public class FormElementHostCommand : IExternalCommand
        {
            public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
            {
                FormElementHost form = new FormElementHost(commandData);

                form.ShowDialog();

                return Result.Succeeded;
            }
        }
    -Form (System.Windows.Forms.Form) :
    Code:
    public partial class FormElementHost : Forms.Form
    {
        ExternalCommandData _commandData;

        public FormElementHost(ExternalCommandData commandData)
            : this()
        {
            _commandData = commandData;
        }

        public FormElementHost()
        {
            InitializeComponent();
            this.userControl11.ClickEvent += UserControl11_ClickEvent;
        }

        private void UserControl11_ClickEvent(object sender, EventArgs e)
        {
            Family family;
            string message;
            UtilsFamily.LoadFamily(_commandData.Application.ActiveUIDocument.Document, out family, out message);
        }
    }
    -UserControl WPF (System.Windows.Controls.UserControl) :
    Code:
    public partial class UserControl1 : UserControl
    {
        public event EventHandler ClickEvent;

        private void RaisesEventClick()
        {
            if (this.ClickEvent != null)
                this.ClickEvent(this, new EventArgs());
        }

        public UserControl1()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            RaisesEventClick();
        }
    }



    2)FormNoElementHost (windows form) : (not lose focus)
    -Command:
    Code:
    [Transaction(TransactionMode.Manual)]
    public class FormNoElementHostCommand : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            FormNoElementHost form = new FormNoElementHost(commandData);

            form.ShowDialog();

            return Result.Succeeded;
        }
    }
    -Form (System.Windows.Forms.Form) :
    Code:
    public partial class FormNoElementHost : Forms.Form
    {
        ExternalCommandData _commandData;

        public FormNoElementHost(ExternalCommandData commandData)
            : this()
        {
            _commandData = commandData;
        }

        public FormNoElementHost()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Family family;
            string message;
            UtilsFamily.LoadFamily(_commandData.Application.ActiveUIDocument.Document, out family, out message);
        }
    }



    3)WindowWPF (Window) : (lose focus)
    -Command :
    Code:
     [Transaction(TransactionMode.Manual)]
    public class WindowWPFCommand : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            WindowWPF  window = new WindowWPF(commandData);

            window.ShowDialog();

            return Result.Succeeded;
        }
    }

    -Window (System.Windows.Window) :
    Code:
    public partial class WindowWPF : Window
{
    ExternalCommandData _commandData;

    public WindowWPF(ExternalCommandData commandData)
        : this()
    {
        _commandData = commandData;
    }

    public WindowWPF()
    {
        InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        Family family;
        string message;
        UtilsFamily.LoadFamily(_commandData.Application.ActiveUIDocument.Document, out family, out message);
    }
}



    UtilsFamily :
    Code:
    public class UtilsFamily
    {
        public static bool LoadFamily(Document doc, out Family family, out string message)
        {
            family = null;
            message = null;

            // ask user to select a family file
            System.Windows.Forms.OpenFileDialog fileDlg = new System.Windows.Forms.OpenFileDialog();
            fileDlg.Filter = "Revit family (*.rfa)|*.rfa";
            fileDlg.Multiselect = false;
            if (fileDlg.ShowDialog() == System.Windows.Forms.DialogResult.Cancel)
                return false;

            using (Transaction tr = new Transaction(doc))
            {
                tr.Start("Load family");

                if (!doc.LoadFamily(fileDlg.FileName, new FamilyOption(), out family))
                {
                    message = "Could not load family !";
                    tr.RollBack();
                    return false;
                }

                tr.Commit();
            }
            return true;
        }
    }
    Tags: None
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