99 lines
3.6 KiB
C#
99 lines
3.6 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Media;
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namespace ExtendedGrid.Classes
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{
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internal sealed class FindControls
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{
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public static T FindParent<T>(DependencyObject child) where T : DependencyObject
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{
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//get parent item
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var parentObject = VisualTreeHelper.GetParent(child);
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//we've reached the end of the tree
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if (parentObject == null) return null;
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//check if the parent matches the type we're looking for
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var parent = parentObject as T;
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return parent ?? FindParent<T>(parentObject);
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}
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public static T FindChild<T>(DependencyObject parent, string childName) where T : DependencyObject
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{
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// Confirm parent and childName are valid.
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if (parent == null) return null;
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T foundChild = null;
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var childrenCount = VisualTreeHelper.GetChildrenCount(parent);
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for (var i = 0; i < childrenCount; i++)
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{
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var child = VisualTreeHelper.GetChild(parent, i);
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// If the child is not of the request child type child
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var childType = child as T;
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if (childType == null)
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{
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// recursively drill down the tree
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foundChild = FindChild<T>(child, childName);
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// If the child is found, break so we do not overwrite the found child.
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if (foundChild != null) break;
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}
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else if (!string.IsNullOrEmpty(childName))
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{
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var frameworkElement = child as FrameworkElement;
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// If the child's name is set for search
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if (frameworkElement != null && frameworkElement.Name == childName)
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{
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// if the child's name is of the request name
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foundChild = (T)child;
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break;
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}
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}
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else
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{
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// child element found.
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foundChild = (T)child;
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break;
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}
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}
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return foundChild;
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}
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public static DataGridColumnHeader GetColumnHeaderFromColumn(DataGridColumn column,DataGrid grid)
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{
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// dataGrid is the name of your DataGrid. In this case Name="dataGrid"
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var columnHeaders = GetVisualChildCollection<DataGridColumnHeader>(grid);
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return columnHeaders.FirstOrDefault(columnHeader => columnHeader.Column == column);
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}
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public static List<T> GetVisualChildCollection<T>(object parent) where T : Visual
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{
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var visualCollection = new List<T>();
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GetVisualChildCollection(parent as DependencyObject, visualCollection);
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return visualCollection;
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}
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private static void GetVisualChildCollection<T>(DependencyObject parent, List<T> visualCollection) where T : Visual
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{
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int count = VisualTreeHelper.GetChildrenCount(parent);
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for (int i = 0; i < count; i++)
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{
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DependencyObject child = VisualTreeHelper.GetChild(parent, i);
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if (child is T)
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{
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visualCollection.Add(child as T);
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}
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else if (child != null)
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{
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GetVisualChildCollection(child, visualCollection);
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}
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}
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}
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}
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}
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