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add showRowNumber property to DataGrid

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Mahdi Hosseini 2018-11-21 14:34:25 +03:30 committed by GitHub
parent d97d848cc6
commit 0bb9c67ff0
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1 changed files with 74 additions and 2 deletions
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76
HandyControl/Controls/Attach/DataGridAttach.cs
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@ -1,6 +1,10 @@
using System.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
namespace HandyControl.Controls
{
@ -206,5 +210,73 @@ namespace HandyControl.Controls
}
}
}
public static DependencyProperty ShowRowNumberProperty = DependencyProperty.RegisterAttached("ShowRowNumber", typeof(bool), typeof(DataGridAttach), new FrameworkPropertyMetadata(false, OnShowRowNumberChanged));
public static bool GetShowRowNumber(DependencyObject target)
{
return (bool)target.GetValue(ShowRowNumberProperty);
}
public static void SetShowRowNumber(DependencyObject target, bool value)
{
target.SetValue(ShowRowNumberProperty, value);
}
private static void OnShowRowNumberChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
{
DataGrid dataGrid = target as DataGrid;
if ((bool)e.NewValue == true)
{
EventHandler<DataGridRowEventArgs> loadedRowHandler = null;
loadedRowHandler = (object sender, DataGridRowEventArgs ea) =>
{
if (GetShowRowNumber(dataGrid) == false)
{
dataGrid.LoadingRow -= loadedRowHandler;
return;
}
ea.Row.Header = ea.Row.GetIndex() + 1;
};
dataGrid.LoadingRow += loadedRowHandler;
ItemsChangedEventHandler itemsChangedHandler = null;
itemsChangedHandler = (object sender, ItemsChangedEventArgs ea) =>
{
if (GetShowRowNumber(dataGrid) == false)
{
dataGrid.ItemContainerGenerator.ItemsChanged -= itemsChangedHandler;
return;
}
GetVisualChildCollection<DataGridRow>(dataGrid).
ForEach(d => d.Header = d.GetIndex());
};
dataGrid.ItemContainerGenerator.ItemsChanged += itemsChangedHandler;
}
}
private static List<T> GetVisualChildCollection<T>(object parent) where T : Visual
{
List<T> visualCollection = new List<T>();
GetVisualChildCollection(parent as DependencyObject, visualCollection);
return visualCollection;
}
private static void GetVisualChildCollection<T>(DependencyObject parent, List<T> visualCollection) where T : Visual
{
int count = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < count; i++)
{
DependencyObject child = VisualTreeHelper.GetChild(parent, i);
if (child is T)
{
visualCollection.Add(child as T);
}
if (child != null)
{
GetVisualChildCollection(child, visualCollection);
}
}
}
}
}
}