3rdpartylibs/fastreports.wpf/FastReport.WPF/Design/PageDesigners/Dialog/DialogPageDesigner.WPF.cs

using FastReport.Forms;
using System.Windows.Forms;

namespace FastReport.Design.PageDesigners.Dialog
{
    partial class DialogPageDesigner
    {
        private void UpdatePageFormLocation()
        {
            if (DialogPage == null)
                return;

            // avoid "bad form owner" bug
            System.Windows.Window designerForm = System.Windows.Window.GetWindow(Designer.control);
            if (designerForm == null || !designerForm.IsVisible)
                return;

            BaseForm form = DialogPage.Form;
            form.StartPosition = FormStartPosition.Manual;
            // locate the form on the bottom of the designer's screen. This will autoscale the form
            // according to the designer's dpi; also the form will not be visible on undo operations.
            Screen sc = Screen.FromControl(designerForm);
            form.MoveWindow(sc.WorkingArea.Left, sc.WorkingArea.Bottom, designerForm);
            form.Show();
            form.SendToBack();
            DialogPage.ResetFormBitmap();

            Focus();
        }

        private void HidePageForm()
        {
            if (DialogPage == null)
                return;

            DialogPage.Form.Hide();
        }
    }
}