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TreeDataGrid: Added Row Headers with FrozenColumnCount. #13

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TreeDataGrid: Added Row Headers with FrozenColumnCount. #13

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2 changes: 1 addition & 1 deletion TreeDataGrid/FlatTreeDataGridSample/FlatTreeDataGridSample.csproj
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Expand Up @@ -14,7 +14,7 @@

<ItemGroup>
<PackageReference Include="Avalonia" Version="$(AvaloniaVersion)" />
<PackageReference Include="Avalonia.Controls.TreeDataGrid" Version="11.2.0" />
<PackageReference Include="Avalonia.Controls.TreeDataGrid" Version="11.3.0-beta4" />
<PackageReference Include="Avalonia.Desktop" Version="$(AvaloniaVersion)" />
<PackageReference Include="Avalonia.Themes.Fluent" Version="$(AvaloniaVersion)" />
<PackageReference Include="Avalonia.Fonts.Inter" Version="$(AvaloniaVersion)" />
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7 changes: 7 additions & 0 deletions TreeDataGrid/FlatTreeDataGridSample/ViewModels/MainWindowViewModel.cs
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Expand Up @@ -2,6 +2,7 @@
using System.Linq;
using Avalonia.Controls;
using Avalonia.Controls.Models.TreeDataGrid;
using Avalonia.Controls.Selection;
using FlatTreeDataGridSample.Models;

namespace FlatTreeDataGridSample.ViewModels;
Expand All @@ -26,6 +27,11 @@ public MainWindowViewModel()
{
Columns =
{
// Define a row header column for row numbering. This can be made to be always
// visible when scrolling horizontally by setting FrozenColumnCount = 1 on the
// TreeDataGrid.
new RowHeaderColumn<Country>(),

// Define a read/write text column for the country name with text search enabled.
new TextColumn<Country, string>(
"Country",
Expand All @@ -52,6 +58,7 @@ public MainWindowViewModel()
}
};

Source.Selection = new TreeDataGridCellSelectionModel<Country>(Source);
MaxPopulation = _data.Max(x => x.Population);
}

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1 change: 1 addition & 0 deletions TreeDataGrid/FlatTreeDataGridSample/Views/MainWindow.axaml
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Expand Up @@ -18,6 +18,7 @@
Source="{Binding Source}"
AllowTriStateSorting="True"
AutoDragDropRows="True"
FrozenColumnCount="1"
CellPrepared="countries_CellPrepared"
CellClearing="countries_CellClearing">
<TreeDataGrid.Resources>
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2 changes: 2 additions & 0 deletions TreeDataGrid/FlatTreeDataGridSample/readme.md
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Expand Up @@ -10,6 +10,7 @@ This `FlatTreeDataGridSource` sets up a grid which displays a list of countries

### Column Configuration
- **Multiple Column Types**: The sample shows how to define different column types:
- A row header column for row numbers. Together with the `FrozenColumnCount` property, this keeps the row numbers visible during horizontal scrolling.
- Read/write text columns with the `Country` name column
- Template columns with custom cell and edit templates for the `Region` column
- Read-only text columns for data like `Population` and `Area`
Expand All @@ -26,6 +27,7 @@ This `FlatTreeDataGridSource` sets up a grid which displays a list of countries
- **Column Header Styling**: Custom styling for specific column headers (last column appears in bold)
- **Cell Styling**: Custom styling for specific cells (last column cells appear in bold)
- **Custom Templates**: Both display and edit templates for the Region column, including a ComboBox for selection
- **Frozen Columns**: Keeping certain columns fixed during horizontal scrolling by setting `TreeDataGrid.FrozenColumnCount`

### Data Binding
- Proper MVVM implementation showing how to bind a collection of domain objects (Countries) to the TreeDataGrid
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