所以我刚刚开始涉足 pyRevit 中的 WPF。我尝试像这样实现pyrevit.forms.WPFWindow 类：

# -*- coding: UTF-8 -*-
"""
Third-Party software credits:
pyRevit: repository at https://github.com/eirannejad/pyRevit
"""

import System, clr, json, sys
clr.AddReference("System.Windows.Forms")
clr.AddReference('IronPython.Wpf')
import wpf
from Autodesk.Revit.DB import *
from pyrevit import revit, script, forms

class FactorySettings(forms.WPFWindow):

    def __init__(self):
        forms.WPFWindow.__init__(self, script.get_bundle_file('settings.xaml'))

    def something_click(self, A, B):
        plantings = FilteredElementCollector(revit.doc) \
            .WhereElementIsElementType() \
            .OfCategory(BuiltInCategory.OST_Planting)

ui = FactorySettings()
ui.show()

这是我的 xaml：

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:Collections="clr-namespace:System.Collections;assembly=mscorlib"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
        mc:Ignorable="d"
        ShowInTaskbar="False" ResizeMode="CanResize"
        WindowStartupLocation="CenterScreen"
        HorizontalContentAlignment="Center"
        Title="Set worksets" Width="300" SizeToContent="Height"
        >
    <StackPanel Margin="0,0,0,0" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
        <Button Content="Do something" Name="something" Click="something_click"/>
    </StackPanel>

</Window>

这将打开一个非模式窗口，因为def show(self, modal=False):类函数。 对我来说问题是即使我的点击功能只调用FilteredElementCollector对象，Revit 崩溃。如果我做ui.show(modal=True)它会起作用，但我无法在 Revit UI 中执行任何操作。 我真正想要的是这样做：

def something_click(self, A, B):
    if self.PHfamSymbol != None:
         with forms.WarningBar(title='Place an instance of the placeholder object.'):
            revit.uidoc.PromptForFamilyInstancePlacement(self.PHfamSymbol)

这是行不通的，因为焦点仍然在 UI 上。 我试过这个：

def something_click(self, A, B):
    if self.PHfamSymbol != None:
        self.Close()
         with forms.WarningBar(title='Place an instance of the placeholder object.'):
            try:
                revit.uidoc.PromptForFamilyInstancePlacement(self.PHfamSymbol)
            except:
                pass

这可行，但完成后我需要创建一个新的 UI 实例。 pyRevit 是否有可能拥有非模态 UI？

你需要使用一个外部事件 https://www.revitapidocs.com/2020/05089477-4612-35b2-81a2-89c4f44370ea.htm在非模态窗口中与 Revit 进行交互。你有很多样本pyRevitMEP https://github.com/CyrilWaechter/pyRevitMEP。我制造了一个可重用的类在这里 https://github.com/CyrilWaechter/pyRevitMEP/blob/master/lib/pyrevitmep/event.py。我在许多 pyRevitMEP 脚本中使用它，例如元素三维旋转 https://github.com/CyrilWaechter/pyRevitMEP/tree/master/pyRevitMEP.tab/Modify.panel/Element3DRotation.pushbutton。你也可以看看我的旧博客[Revit API] pyRevit 中的简单无模式表单（外部事件处理程序） https://pythoncvc.net/?p=247帖子引用了更多资源并有更多评论。

Sample

script

"""
Copyright (c) 2017 Cyril Waechter
Python scripts for Autodesk Revit

This file is part of pypevitmep repository at https://github.com/CyrilWaechter/pypevitmep

pypevitmep is an extension for pyRevit. It contain free set of scripts for Autodesk Revit:
you can redistribute it and/or modify it under the terms of the GNU General Public License
version 3, as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

See this link for a copy of the GNU General Public License protecting this package.
https://github.com/CyrilWaechter/pypevitmep/blob/master/LICENSE
"""
from Autodesk.Revit.UI import IExternalEventHandler, ExternalEvent
from Autodesk.Revit.DB import Transaction
from Autodesk.Revit.Exceptions import InvalidOperationException
import rpw
from pyrevit.forms import WPFWindow
doc = rpw.revit.doc
uidoc = rpw.revit.uidoc

__doc__ = "A simple modeless form sample"
__title__ = "Modeless Form"
__author__ = "Cyril Waechter"
__persistentengine__ = True

# Simple function we want to run
def delete_elements():
    with rpw.db.Transaction("Delete selection"):
        for elid in uidoc.Selection.GetElementIds():
            doc.Delete(elid)

# Create a subclass of IExternalEventHandler
class SimpleEventHandler(IExternalEventHandler):
    """
    Simple IExternalEventHandler sample
    """

    # __init__ is used to make function from outside of the class to be executed by the handler. \
    # Instructions could be simply written under Execute method only
    def __init__(self, do_this):
        self.do_this = do_this

    # Execute method run in Revit API environment.
    def Execute(self, uiapp):
        try:
            self.do_this()
        except InvalidOperationException:
            # If you don't catch this exeption Revit may crash.
            print "InvalidOperationException catched"

    def GetName(self):
        return "simple function executed by an IExternalEventHandler in a Form"


# Now we need to make an instance of this handler. Moreover, it shows that the same class could be used to for
# different functions using different handler class instances
simple_event_handler = SimpleEventHandler(delete_elements)
# We now need to create the ExternalEvent
ext_event = ExternalEvent.Create(simple_event_handler)

# A simple WPF form used to call the ExternalEvent
class ModelessForm(WPFWindow):
    """
    Simple modeless form sample
    """

    def __init__(self, xaml_file_name):
        WPFWindow.__init__(self, xaml_file_name)
        self.simple_text.Text = "Hello World"
        self.Show()

    def delete_click(self, sender, e):
        # This Raise() method launch a signal to Revit to tell him you want to do something in the API context
        ext_event.Raise()

# Let's launch our beautiful and useful form !
modeless_form = ModelessForm("ModelessForm.xaml")

xaml文件

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Delete things:" Height="150" Width="300" ShowInTaskbar="False" Topmost="True"
        WindowStartupLocation="CenterScreen" ScrollViewer.VerticalScrollBarVisibility="Disabled" HorizontalContentAlignment="Center">
    <StackPanel Margin="20" HorizontalAlignment="Stretch">
        <TextBlock x:Name="simple_text" Text="" Grid.Column="0" HorizontalAlignment="Center" FontWeight="Bold"/>
        <Button Content="Delete selected elements" Height="30" Margin="10,10" Click="delete_click"/>
    </StackPanel>
</Window>