AttachedPropertiesContainer class

Static container for attached properties.

Inheritance hierarchy

SystemObject
Vishnu.WPF_UI.DependencyPropertiesAttachedPropertiesContainer

Namespace: Vishnu.WPF_UI.DependencyProperties
Assembly: Vishnu.WPF_UI (in Vishnu.WPF_UI.dll) Version: 1.0.0+df0404e911d6c38eaed3bb1bb1acfc482d417643

Syntax

C++

Copy

public static class AttachedPropertiesContainer

Public NotInheritable Class AttachedPropertiesContainer

public ref class AttachedPropertiesContainer abstract sealed

[<AbstractClassAttribute>]
[<SealedAttribute>]
type AttachedPropertiesContainer = class end

The AttachedPropertiesContainer Type exposes the following members.

Methods

	Name	Description of the
	GetHasParent	WPF getter for the HasParentProperty.
	GetLastNotNullLogical	WPF getter for the LastNotNullLogicalProperty.
	GetParentChildOrientation	WPF getter for the ParentChildOrientationProperty.
	SetHasParent	WPF setter for the HasParentProperty.
	SetLastNotNullLogical	WPF setter for the LastNotNullLogicalProperty.
	SetParentChildOrientation	WPF setter for the ParentChildOrientationProperty.

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Fields

	Name	Description of the
	HasParentProperty	In True, the node has a parent node, if False, it is the root.
	LastNotNullLogicalProperty	Attached property for a nullable Boolean for passing on the logical state of the checker assigned to the control (is used, for example, for dependent colouring (false=red, true=green) of a superordinate border in a ControlTemplate): After various failed attempts, the following procedure has proven to be the only viable solution has crystallised: a control superordinate to the ControlTemplate or DataTemplate is assigned the AttachedProperty "LastNotNullLogical": <Expander Name="Exp" Template="{StaticResource ExpanderStyleHeaderCentered}" ... attached:AttachedPropertiesContainer.LastNotNullLogical="{Binding LastNotNullLogical, diag:PresentationTraceSources.TraceLevel=High}" > The AttachedProperty "LastNotNullLogical" is directly linked to "LastNotNullLogical" from is bound to the DataContext, in this case "LogicalNodeViewModel". In the subordinate ControlTemplate, here <ControlTemplate TargetType="ToggleButton"> in LogicalTaskTreeControlStaticResourceDictionary.xaml, DataTriggers are passed to the higher-level Control with Path bound to the AttachedProperty "LastNotNullLogical": <DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Expander}}, Path=(attached:AttachedPropertiesContainer.LastNotNullLogical)}" Value="True"> <Setter Property = "Border.BorderBrush" TargetName="ToggleButtonBorder" Value="{StaticResource ItemBorderBrushGreen}" /> </DataTrigger> <DataTrigger Binding = "{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Expander}}, Path=(attached:AttachedPropertiesContainer.LastNotNullLogical)}" Value="False"> <Setter Property = "Border.BorderBrush" TargetName = "ToggleButtonBorder" Value = "{StaticResource ItemBorderBrushRed}" /> </ DataTrigger> Important note: other solution approaches failed at the latest when the tree orientation was switched.
	ParentChildOrientationProperty	Alignment of the child nodes, horizontal or vertical.

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Attached properties

	Name	Description of the
	HasParent	Attached property (bool). If true, the node has child nodes.
	LastNotNullLogical	Attached property for a nullable Boolean for passing on the logical state of the checker assigned to the control (is used, for example, for dependent colouring (false=red, true=green) of a superordinate border in a ControlTemplate): After various failed attempts, the following procedure has proven to be the only viable solution has crystallised: a control superordinate to the ControlTemplate or DataTemplate is assigned the AttachedProperty "LastNotNullLogical": <Expander Name="Exp" Template="{StaticResource ExpanderStyleHeaderCentered}" ... attached:AttachedPropertiesContainer.LastNotNullLogical="{Binding LastNotNullLogical, diag:PresentationTraceSources.TraceLevel=High}" > The AttachedProperty "LastNotNullLogical" is directly linked to "LastNotNullLogical" from is bound to the DataContext, in this case "LogicalNodeViewModel". In the subordinate ControlTemplate, here <ControlTemplate TargetType="ToggleButton"> in LogicalTaskTreeControlStaticResourceDictionary.xaml, DataTriggers are passed to the higher-level Control with Path bound to the AttachedProperty "LastNotNullLogical": <DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Expander}}, Path=(attached:AttachedPropertiesContainer.LastNotNullLogical)}" Value="True"> <Setter Property = "Border.BorderBrush" TargetName="ToggleButtonBorder" Value="{StaticResource ItemBorderBrushGreen}" /> </DataTrigger> <DataTrigger Binding = "{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Expander}}, Path=(attached:AttachedPropertiesContainer.LastNotNullLogical)}" Value="False"> <Setter Property = "Border.BorderBrush" TargetName = "ToggleButtonBorder" Value = "{StaticResource ItemBorderBrushRed}" /> </ DataTrigger> Important note: other solution approaches failed at the latest when the tree orientation was switched.
	ParentChildOrientation	Attached Property (Orientation), Horizontal or Vertical.

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Remarks

File: AttachedPropertiesContainer.cs Author: Erik Nagel 22/07/2013 Erik Nagel: created 28.11.2022 Erik Nagel: LastNotNullLogicalProperty.

Reference

Vishnu.WPF_UI.DependencyProperties namespace