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Added in generic ViewModel

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This commit is contained in:
Clint Rutkas
2020-03-11 10:43:32 -07:00
committed by Lavius Motileng
parent e2c7941542
commit 3f5a54f9f1
43 changed files with 1305 additions and 23 deletions
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134
src/core/Microsoft.PowerToys.Settings.UI/Behaviors/NavigationViewHeaderBehavior.cs Normal file
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using Microsoft.PowerToys.Settings.UI.Services;
using Microsoft.Xaml.Interactivity;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using WinUI = Microsoft.UI.Xaml.Controls;
namespace Microsoft.PowerToys.Settings.UI.Behaviors
{
public class NavigationViewHeaderBehavior : Behavior<WinUI.NavigationView>
{
private static NavigationViewHeaderBehavior _current;
private Page _currentPage;
public DataTemplate DefaultHeaderTemplate { get; set; }
public object DefaultHeader
{
get { return GetValue(DefaultHeaderProperty); }
set { SetValue(DefaultHeaderProperty, value); }
}
public static readonly DependencyProperty DefaultHeaderProperty = DependencyProperty.Register("DefaultHeader", typeof(object), typeof(NavigationViewHeaderBehavior), new PropertyMetadata(null, (d, e) => _current.UpdateHeader()));
public static NavigationViewHeaderMode GetHeaderMode(Page item)
{
return (NavigationViewHeaderMode)item.GetValue(HeaderModeProperty);
}
public static void SetHeaderMode(Page item, NavigationViewHeaderMode value)
{
item.SetValue(HeaderModeProperty, value);
}
public static readonly DependencyProperty HeaderModeProperty =
DependencyProperty.RegisterAttached("HeaderMode", typeof(bool), typeof(NavigationViewHeaderBehavior), new PropertyMetadata(NavigationViewHeaderMode.Always, (d, e) => _current.UpdateHeader()));
public static object GetHeaderContext(Page item)
{
return item.GetValue(HeaderContextProperty);
}
public static void SetHeaderContext(Page item, object value)
{
item.SetValue(HeaderContextProperty, value);
}
public static readonly DependencyProperty HeaderContextProperty =
DependencyProperty.RegisterAttached("HeaderContext", typeof(object), typeof(NavigationViewHeaderBehavior), new PropertyMetadata(null, (d, e) => _current.UpdateHeader()));
public static DataTemplate GetHeaderTemplate(Page item)
{
return (DataTemplate)item.GetValue(HeaderTemplateProperty);
}
public static void SetHeaderTemplate(Page item, DataTemplate value)
{
item.SetValue(HeaderTemplateProperty, value);
}
public static readonly DependencyProperty HeaderTemplateProperty =
DependencyProperty.RegisterAttached("HeaderTemplate", typeof(DataTemplate), typeof(NavigationViewHeaderBehavior), new PropertyMetadata(null, (d, e) => _current.UpdateHeaderTemplate()));
protected override void OnAttached()
{
base.OnAttached();
_current = this;
NavigationService.Navigated += OnNavigated;
}
protected override void OnDetaching()
{
base.OnDetaching();
NavigationService.Navigated -= OnNavigated;
}
private void OnNavigated(object sender, NavigationEventArgs e)
{
var frame = sender as Frame;
if (frame.Content is Page page)
{
_currentPage = page;
UpdateHeader();
UpdateHeaderTemplate();
}
}
private void UpdateHeader()
{
if (_currentPage != null)
{
var headerMode = GetHeaderMode(_currentPage);
if (headerMode == NavigationViewHeaderMode.Never)
{
AssociatedObject.Header = null;
AssociatedObject.AlwaysShowHeader = false;
}
else
{
var headerFromPage = GetHeaderContext(_currentPage);
if (headerFromPage != null)
{
AssociatedObject.Header = headerFromPage;
}
else
{
AssociatedObject.Header = DefaultHeader;
}
if (headerMode == NavigationViewHeaderMode.Always)
{
AssociatedObject.AlwaysShowHeader = true;
}
else
{
AssociatedObject.AlwaysShowHeader = false;
}
}
}
}
private void UpdateHeaderTemplate()
{
if (_currentPage != null)
{
var headerTemplate = GetHeaderTemplate(_currentPage);
AssociatedObject.HeaderTemplate = headerTemplate ?? DefaultHeaderTemplate;
}
}
}
}

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src/core/Microsoft.PowerToys.Settings.UI/Behaviors/NavigationViewHeaderMode.cs Normal file
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namespace Microsoft.PowerToys.Settings.UI.Behaviors
{
public enum NavigationViewHeaderMode
{
Always,
Never,
Minimal
}
}