wpf 如何更改 MahApps.Metro 对话框内容模板宽度？
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How to change MahApps.Metro dialog content template width?
提问by user2042930
I would like to change the base template of the MahApps.Metrodialogs (or create a new dialog type), because I would like to show them in a narrow login window. Right now almost all the second words in the message are in a new row, but there are nice big spaces on the right and the left side, which I would like to reduce.
我想更改MahApps.Metro对话框的基本模板（或创建新的对话框类型），因为我想在狭窄的登录窗口中显示它们。现在消息中几乎所有的第二个单词都在一个新的行中，但左右两侧有很大的空格，我想减少。
I've found in BaseMetroDialog.xamlthat the message dialog is divided into three parts vertically: 25%space on left side, 50%for the content and 25%space on the right side. I would like to change these numbers.
我发现BaseMetroDialog.xaml消息对话框垂直分为三个部分：左侧25% 的空间，内容的50%和右侧的25% 的空间。我想更改这些数字。
But how could I change the control template of BaseMetroWindowwith my new one?
但是我怎么能用我的新控制模板来改变BaseMetroWindow呢？
回答by punker76
Just create your own style that overrides the dialog Template(and add the DialogShownStoryboardtoo).
只需创建自己的样式来覆盖对话框Template（并添加DialogShownStoryboard）。
<Style TargetType="{x:Type Dialog:BaseMetroDialog}"
x:Key="NewCustomDialogStyle"
BasedOn="{StaticResource {x:Type Dialog:BaseMetroDialog}}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Dialog:BaseMetroDialog}">
<ControlTemplate.Resources>
<Storyboard x:Key="DialogShownStoryboard">
<DoubleAnimation AccelerationRatio=".9"
BeginTime="0:0:0"
Duration="0:0:0.2"
Storyboard.TargetProperty="Opacity"
To="1" />
</Storyboard>
</ControlTemplate.Resources>
<Grid Background="{TemplateBinding Background}">
<Border FocusVisualStyle="{x:Null}"
Focusable="False">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<ContentPresenter Grid.Row="0"
Content="{TemplateBinding DialogTop}" />
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10*" />
<ColumnDefinition Width="80*" />
<ColumnDefinition Width="10*" />
</Grid.ColumnDefinitions>
<!-- Content area -->
<Grid Grid.Column="1"
Margin="0 10 0 0">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0"
FontSize="{DynamicResource DialogTitleFontSize}"
Foreground="{TemplateBinding Foreground}"
Text="{TemplateBinding Title}"
TextWrapping="Wrap" />
<ContentPresenter Grid.Row="1"
Content="{TemplateBinding Content}" />
</Grid>
</Grid>
<ContentPresenter Grid.Row="2"
Content="{TemplateBinding DialogBottom}" />
</Grid>
</Border>
</Grid>
<ControlTemplate.Triggers>
<EventTrigger RoutedEvent="Loaded">
<EventTrigger.Actions>
<BeginStoryboard Storyboard="{StaticResource DialogShownStoryboard}" />
</EventTrigger.Actions>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
The namespace here is
这里的命名空间是
xmlns:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
Now use this custom style e.g. for a custom dialog
现在使用此自定义样式，例如自定义对话框
<Dialog:CustomDialog x:Key="CustomDialogTest"
Style="{StaticResource NewCustomDialogStyle}"
Title="This dialog allows arbitrary content. It will close in 5 seconds."
x:Name="CustomTestDialog">
<StackPanel>
<TextBlock Height="30"
Text="This dialog allows arbitrary content. You have to close it yourself by clicking the close button below."
TextWrapping="Wrap"
Foreground="{DynamicResource AccentColorBrush}" />
<Button Content="Close Me!" />
</StackPanel>
</Dialog:CustomDialog>
Screenshot from main demo
主演示截图
Update
更新
With the latest version of MahApps.Metro it's now possible to change e.g. the MessageDialogstyle globally.
使用最新版本的 MahApps.Metro，现在可以更改例如MessageDialog全局样式。
<Style TargetType="{x:Type Dialog:MessageDialog}"
x:Key="NewCustomMessageDialogStyle"
BasedOn="{StaticResource {x:Type Dialog:BaseMetroDialog}}">
<Setter Property="Template">
<!-- the custom template for e.g. MessageDialog -->
</Setter>
</Style>
<Style TargetType="{x:Type Dialog:MessageDialog}" BasedOn="{StaticResource NewCustomMessageDialogStyle}" />
Hope that helps!
希望有帮助！
回答by Hugh
It took me a little while to work this out but for fellow newbies like me, here is my fully documented solution to creating customised dialog boxes using mahapps and MVVM. There are probably aspects which could be improved but this is what worked for me.
我花了一点时间来解决这个问题，但对于像我这样的新手，这里是我使用 mahapps 和 MVVM 创建自定义对话框的完整记录的解决方案。可能有可以改进的方面，但这对我有用。
Declare your dialog resource dictionary in the App.xaml so it is available globally
在 App.xaml 中声明您的对话资源字典，以便全局可用
App.xaml
应用程序.xaml
<Application x:Class="MyAppName.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MyAppName"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
>
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary>
<ResourceDictionary Source="DialogResource.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
The resource dictionary contains the template replacement code for the custom dialog
资源字典包含自定义对话框的模板替换代码
DialogResource.xaml
对话框资源.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MyAppName.MyResources"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
>
<!== Override default template for Mahapps custom dialog -->
<Style TargetType="{x:Type Dialog:BaseMetroDialog}"
x:Key="NewCustomDialogStyle"
BasedOn="{StaticResource {x:Type Dialog:BaseMetroDialog}}">
<Setter Property="Template">
<!-- Custom template xaml code goes here -- see above StackOverflow answer from Punker76 --->
</Setter>
</Style>
</ResourceDictionary>
Create a WPF window called UserInputDialog then replace allxaml code with customdialog xaml. Im using Caliburn Micro syntax to bind the buttons to the underlay dialog viewmodel (cal:Message.Attach=). In the case of dialog xaml code I need to manually specify the button bindings as for some reason with Caliburn Micro it is not automatic like in the main view model.
创建一个名为 UserInputDialog 的 WPF 窗口，然后用 customdialog xaml替换所有xaml 代码。我使用 Caliburn Micro 语法将按钮绑定到底层对话框视图模型 (cal:Message.Attach=)。在对话框 xaml 代码的情况下，我需要手动指定按钮绑定，因为出于某种原因，Caliburn Micro 不像在主视图模型中那样是自动的。
UserInputDialog.xaml
用户输入对话框.xaml
<Dialog:CustomDialog
x:Name="MyUserInputDialog"
x:Class="MyAppName.UserInputDialog"
Style="{StaticResource NewCustomDialogStyle}"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:cal="http://www.caliburnproject.org"
xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
>
<!-- , diag:PresentationTraceSources.TraceLevel=High -->
<StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center" >
<Label HorizontalAlignment="Center" Margin="10" Content="{Binding MessageText}" />
<TextBox x:Name="tbInput"
Width="200"
Margin="10"
Content="{Binding UserInput}"
HorizontalAlignment="Center"
KeyDown="tbInput_KeyDown"
/>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="10,20" >
<Button x:Name="butOK"
Content="OK"
Width="80"
Margin="10,0"
HorizontalAlignment="Center"
cal:Message.Attach="butOK"
/>
<Button x:Name="butCancel"
Content="Cancel"
Width="80"
Margin="10,0"
HorizontalAlignment="Center"
cal:Message.Attach="butCancel"
/>
</StackPanel>
</StackPanel>
</Dialog:CustomDialog>
And the code-behind for UserInputDialog:
以及 UserInputDialog 的代码隐藏：
UserInputDialog.xaml.cs
用户输入对话框.xaml.cs
using MahApps.Metro.Controls.Dialogs;
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace MyAppName
{
public partial class UserInputDialog : CustomDialog
{
public UserInputDialog()
{
InitializeComponent();
MinWidth = 300;
MinHeight = 300;
Loaded += Dialog_Loaded;
}
private void Dialog_Loaded(Object sender, RoutedEventArgs e)
{
tbInput.Focus();
}
private void tbInput_KeyDown(object sender, KeyEventArgs e)
{
//Not strictly MVVM but prefer the simplicity of using code-behind for this
switch (e.Key)
{
case Key.Enter:
if(this.DataContext != null) (dynamic)this.DataContext.butOK();
break;
case Key.Escape:
if(this.DataContext != null) (dynamic)this.DataContext.butCancel();
break;
}
}
}
}
Create viewmodel class specifically for the user input dialog
专门为用户输入对话框创建视图模型类
UserInputViewModel.cs
用户输入视图模型.cs
using System;
using System.Windows.Input;
using Caliburn.Micro;
using MyAppName.Models;
using System.Security;
namespace MyAppName.ViewModels
{
public class UserInputViewModel : PropertyChangedBase
{
private readonly ICommand _closeCommand;
public string MessageText { get; set; } // Message displayed to user
public string UserInput { get; set; } // User input returned
public bool Cancel { get; set; } // Flagged true if user clicks cancel button
//Constructor
public UserInputViewModel(Action<UserInputViewModel> closeHandler)
{
Cancel = false;
_closeCommand = new SimpleCommand { ExecuteDelegate = o => closeHandler(this) };
}
public void butCancel()
{
Cancel = true;
_closeCommand.Execute(this);
}
public void butOK()
{
Cancel = false;
_closeCommand.Execute(this);
}
//-----------------
}
}
Create a separate ICommand class to pass in the external dialog close function via the dialog viewmodel constructor
创建一个单独的 ICommand 类，通过对话框视图模型构造函数传入外部对话框关闭函数
SimpleCommand.cs
简单命令.cs
using System;
using System.Windows.Input;
namespace MyAppName.Models
{
public class SimpleCommand : ICommand
{
public Predicate<object> CanExecuteDelegate { get; set; }
public Action<object> ExecuteDelegate { get; set; }
public bool CanExecute(object parameter)
{
if (CanExecuteDelegate != null)
return CanExecuteDelegate(parameter);
return true; // if there is no can execute default to true
}
public event EventHandler CanExecuteChanged
{
add { CommandManager.RequerySuggested += value; }
remove { CommandManager.RequerySuggested -= value; }
}
public void Execute(object parameter)
{
if (ExecuteDelegate != null)
ExecuteDelegate(parameter);
}
}
}
And finally here is the main view model code to display the customized dialog box and process the returned user input:-
最后这里是显示自定义对话框和处理返回的用户输入的主视图模型代码：-
MainViewModel.cs
主视图模型.cs
using MahApps.Metro.Controls.Dialogs;
namespace MyAppName.ViewModels
{
/// <summary>
/// The ViewModel for the application's main window.
/// </summary>
public class MainViewModel : PropertyChangedBase
{
private readonly IDialogCoordinator _dialogCoordinator;
//Constructor
public MainViewModel(IDialogCoordinator dialogCoordinator)
{
// Dialog coordinator provided by Mahapps framework
// Either passed into MainViewModel constructor to conform to MVVM:-
_dialogCoordinator = dialogCoordinator;
// or just initialise directly here
// _dialogCoordinator = new DialogCoordinator();
}
public async void GetUserInput()
{
var custom_dialog = new UserInputDialog();
custom_dialog.Height = 300;
custom_dialog.Width = 400;
var dialog_vm = new UserInputViewModel(async instance =>
{
await _dialogCoordinator.HideMetroDialogAsync(this, custom_dialog);
//instance --> dialog ViewModel
if (!(instance.Cancel || String.IsNullOrEmpty(instance.UserInput)) ProcessUserInput(instance.UserInput);
});
dialog_vm.MessageText = "Please type in your first name";
custom_dialog.DataContext = dialog_vm;
await _dialogCoordinator.ShowMetroDialogAsync(this, custom_dialog);
}
public ProcessUserInput(string input_message){
Console.WriteLine("Users firstname is " + input_message);
}
}
}
回答by Mikhail Tumashenko
Another solution is provided on bug tracker: don't use the Content property, use the DialogTop instead. For example:
错误跟踪器提供了另一种解决方案：不要使用 Content 属性，而是使用 DialogTop 。例如：
<dialogs:CustomDialog.DialogTop>
<StackPanel>
....
</StackPanel>
</dialogs:CustomDialog.DialogTop>
Put your custom content (e.g. StackPanel) inside DialogTop and you're done.
将您的自定义内容（例如 StackPanel）放入 DialogTop 中，您就完成了。
回答by ReeganLourduraj
Override metrodialog style and merge the resource to the Metro Window
覆盖 Metrodialog 样式并将资源合并到 Metro Window
<Style x:Key="newDialogStyle" BasedOn="{StaticResource MetroDialogStyle}"
TargetType="{x:Type Dialogs:BaseMetroDialog}">
<!-- ur design of Control Template -->
</Style>
<Dialogs:CustomDialog Style="{StaticResource newDialogStyle}" Title="Custom Dialog which is awaitable">
<StackPanel>
<TextBlock Height="30" Text="This dialog allows arbitrary content. You have to close it yourself by clicking the close button below."
TextWrapping="Wrap"
Foreground="{DynamicResource AccentColorBrush}" />
<Button Content="Close Me!"/>
</StackPanel>
</Dialogs:CustomDialog>
