当重写WPF模板，我必须单独覆盖每个主题的模板？ [英] When overriding WPF templates do I have to override each theme's template separately?

问题描述

我没有要求改变WPF组合框的模板中的一小部分。

如果我走了月神主题现有模板的副本，使这一切工作正常最初的变化。但是，如果用户都有不同的主题，我的组合框保留它的自定义主题，（这显然是根据月亮），这样看起来不合时宜。

有没有办法覆盖只是部分的模板，所以大部分的模板仍然尊重窗口主题？

我注意到，模板的部件形成MWT命名空间的明确提到月神：

 的xmlns：MWT =...等等等等...... = presentationFramework.Luna
 

也许有一些办法让这个MWT命名空间指的是当前的主题，而不是具体的月亮呢？

还是我必须要为每个主题模板的自定义副本？如果MS创建了一个新的主题发生了什么，我会再有更新我的模板来支持它？

（位我改变只是涉及的TextBlock 时，组合框是关闭的。我不会改变下拉或者按钮显示。理想我只想覆盖 SelectionBoxItemTemplate 在组合框，但这是只读的，所以据我可以告诉我有覆盖整个控制模板进行任何更改。）

<子> [相关的问题，但没有答案：<一href="http://stackoverflow.com/questions/980055/adjust-a-control-template-and-still-respect-the-theme-of-the-os">Adjust控制模板，仍然尊重OS的主题？]

解决方案

  

有一点要记住的是，一旦   您创建的ControlTemplate你   控制，要更换整个   控件模板。

从：<一href="http://msdn.microsoft.com/en-us/library/ms745683.aspx">http://msdn.microsoft.com/en-us/library/ms745683.aspx

我从收集的没有，有没有办法更换模板的一部分。该模板被认为是一个单一的单元。但是，有很多方法可以自定义模板，允许通过的风格变化（可根据其他样式）。

如果MS使一个新的主题，那么你将不得不更新自己的自定义控制模板来实现一个相似的主题。记住，你替换，而不是增强了控件模板。

I have a requirement to change a very small part of the WPF ComboBox's template.

If I take a copy of the existing template for the Luna theme and make the change it all works fine initially. But if the user has a different theme, my ComboBox retains it's custom theme, (Which is obviously based on Luna) so looks out of place.

Is there any way of overriding just parts of a template so the majority of the template still respects the windows theme?

I notice that parts of the template define an mwt namespace with an explicit reference to Luna:

xmlns:mwt="...blah blah...=PresentationFramework.Luna"

perhaps there is some way to have this mwt namespace refer to the current theme rather than specifically the Luna one?

Or do I have to provide a custom copy of the template for each theme? And what happens if MS creates a new theme, will I then have to update my template to support it?

(The bit I am changing just relates to the TextBlock displayed when the combo box is closed. I'm not changing the dropdown or the button. Ideally I would just override the SelectionBoxItemTemplate on the ComboBox, but this is readonly, so as far as I can tell I have to override the whole control template to make any changes.)

_{[Related question, but no answers: Adjust a Control Template and still respect the Theme of the OS?]}

解决方案

One thing to keep in mind is that once you create a ControlTemplate for you control, you are replacing the entire ControlTemplate.

From: http://msdn.microsoft.com/en-us/library/ms745683.aspx

What I gather from that is no, there is no way to replace portions of a template. The template is considered a single unit. However, there may be ways to customize your template to allow changes via styles (which can be based on other styles).

If MS makes a new theme, then you will have to update your own custom control templates to implement a similar theme. Remember, you're replacing, not enhancing the control template.

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