Implemented Row Details Support

[w-ahmad]

PR Summary

This pull request introduces row details functionality, refactors row layout handling, and replaces TableViewCellsPresenter with TableViewRowPresenter for better customization and maintainability.

New Properties

• RowDetailsVisibilityMode: Gets or sets the visibility mode of the row details.
• RowDetailsTemplate: Gets or sets the data template for the row details.
• RowDetailsTemplateSelector: Gets or sets the data template selector for the row details.
• AreRowDetailsFrozen: Gets or sets a value indicating whether the row details are frozen during horizontal scrolling.

Row Details Visibility Mode

• Collapsed: Row details are never displayed.
• Visible: Row details are always displayed for all rows.
• VisibleWhenSelected: Row details are displayed only for the selected row or rows.
• VisibleWhenExpanded: default Row details are displayed only when the user expands a row using the toggle button in the row header.

Breaking Change

• Renamed CellsPresenter to TableViewRowPresenter to manage row-specific layout, animations, and row details.

Example Usage

<tv:TableView ItemsSource="{Binding Items}"
              RowDetailsVisibilityMode="VisibleWhenExpanded">
    <tv:TableView.RowDetailsTemplate>
        <DataTemplate x:DataType="local:ExampleModel">
            <StackPanel Orientation="Horizontal"
                        Spacing="12">
                <PersonPicture ProfilePicture="{Binding Avatar}" />
                <StackPanel Spacing="8"
                            Margin="0,8">
                    <TextBlock>
                        <Run Text="Id:" FontWeight="Bold" />
                        <Run Text="{Binding Id}" />
                    </TextBlock>
                    <TextBlock>
                        <Run Text="FirstName:" FontWeight="Bold" />
                        <Run Text="{Binding FirstName}" />
                    </TextBlock>
                    <TextBlock>
                        <Run Text="LastName:" FontWeight="Bold" />
                        <Run Text="{Binding LastName}" />
                    </TextBlock>
                    <TextBlock>
                        <Run Text="Designation:" FontWeight="Bold" />
                        <Run Text="{Binding Designation}" />
                    </TextBlock>
                </StackPanel>
            </StackPanel>
        </DataTemplate>
    </tv:TableView.RowDetailsTemplate>
</tv:TableView>

Recording.2025-10-16.162829.mp4

[Copilot]

Pull Request Overview

Introduces row details support for TableView, refactors row layout from CellsPresenter to a new TableViewRowPresenter, and adds properties to control row details visibility and templating.

• Replace TableViewCellsPresenter with TableViewRowPresenter and update templates
• Add RowDetailsVisibilityMode, RowDetailsTemplate, and RowDetailsTemplateSelector
• Implement visual states and toggle button for expandable row details

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
src/VisualStates.cs	Adds visual state names/groups for row details and details button.
src/Themes/TableViewRowPresenter.xaml	New control template for row with header, cells, and details area, plus VisualStates.
src/Themes/TableViewRow.xaml	Switch item template root to custom ListViewItemPresenter; adjust MinHeight.
src/Themes/TableViewHeaderRow.xaml	Adjust corner button panel and grid lines; bind width to new CellsHorizontalOffset.
src/Themes/TableViewCellsPresenter.xaml	Remove legacy CellsPresenter template.
src/Themes/TableView.xaml	Use TableViewRowPresenter in item template; rename attached property usage.
src/Themes/Resources.xaml	Add row details resources and toggle button style with animated chevron.
src/Themes/Generic.xaml	Replace CellsPresenter resource with RowPresenter resource and style.
src/TableViewRowPresenter.cs	New control managing row header, cells, details layout, and states.
src/TableViewRowHeader.cs	Update sizing and gridline height logic.
src/TableViewRowDetailsVisibilityMode.cs	New enum for row details visibility control.
src/TableViewRow.cs	Integrate with RowPresenter, adjust selection visuals and layout.
src/TableViewHeaderRow.cs	Bind corner panel width to cell offset; refine gridline visibility logic.
src/TableViewCell.cs	Adjust measuring logic and gridline height calculation.
src/TableView.cs	Wire up new presenter, update helper usage, and row details/template propagation.
src/TableView.Properties.cs	Add DPs for row details and CellsHorizontalOffset, with change handlers.
src/Primitives/ListViewItemPresenter.cs	Custom presenter arranges TableViewRowPresenter height.
src/Helpers/AttachedPropertiesHelper.cs	Rename/relocate attached property helper for scrollbar spacing.

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