根据子属性设置表单MinWidth和MinHeight [英] Set form MinWidth and MinHeight based on child property

问题描述

我正在使用MVVM模式在WPF中编写应用程序.在我的应用程序中，我有一个IPopupWindowService，我用它来创建一个弹出对话框窗口.

I'm writing an application in WPF using the MVVM pattern. In my application I've got an IPopupWindowService which I use to create a popup dialog window.

要在弹出窗口中显示ViewModel，您需要执行以下操作:

So to show a ViewModel in a popup window you'd do something like this:

var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
var popupService = container.Resolve<IPopupWindowService>();
var myViewModel = container.Resolve<IMyViewModel>();
popupService.Show((ViewModelBase)myViewModel);

这一切都很好.我想做的是能够将View上的MinHeight和MinWidth设置为绑定到myViewModel，并让弹出窗口使用这些设置，以便用户不能使窗口小于其内容所允许的范围. .在用户缩小窗口的那一刻，内容停止调整大小，但窗口没有调整大小.

This is all well and good. What I want to do is be able to set the MinHeight and MinWidth on the View bound to myViewModel and have the popup window use those settings so that a user cannot make the window smaller than its contents will allow. At the moment when the user shrinks the window the contents stops resizing but the window doesn't.

我将View映射到ResourceDictionarys中的ViewModel上是这样的:

I map my Views to my ViewModels in ResourceDictionarys like so:

<DataTemplate DataType="{x:Type ViewModels:MyViewModel}">
     <Views:MyView />
</DataTemplate>

我的弹出视图如下:

<Window x:Class="TheCompany.Cubit.Shell.Views.PopupWindowView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        SizeToContent="WidthAndHeight"
        WindowStartupLocation="CenterOwner">
<DockPanel x:Name="panelContent">
    <StackPanel HorizontalAlignment="Right" DockPanel.Dock="Bottom" Orientation="Horizontal" Visibility="{Binding RelativeSource={RelativeSource AncestorType=Window},Path=ButtonPanelVisibility}">
        <Button Width="75" IsDefault="True" x:Uid="ViewDialog_AcceptButton" Click="OnAcceptButtonClick" Margin="4">OK</Button>
        <Button Width="75" IsCancel="True" x:Uid="ViewDialog_CancelButton" Click="OnCancelButtonClick" Margin="0,4,4,4">Cancel</Button>
    </StackPanel>
    <ContentPresenter Content="{Binding}" />
</DockPanel>

推荐答案

您可以在ViewModel上定义MinHeight和MinWidth属性，并使用数据绑定将View绑定到XAML中的那些属性:

You can define MinHeight and MinWidth properties on your ViewModel and use databinding to bind the View to those properties in XAML:

<...
    MinHeight="{Binding Path=MinHeight}"
    MinWidth="{Binding Path=MinWidth}"
.../>

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