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using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Tango.Core.Commands;
using Tango.Core.EventArguments;
namespace Tango.Touch.Controls
{
public class TouchAutoComplete : TouchInput
{
private TextBox _textBox;
private Popup _popup;
private TouchListBox _listbox;
public String Text
{
get { return (String)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
public static readonly DependencyProperty TextProperty =
DependencyProperty.Register("Text", typeof(String), typeof(TouchAutoComplete), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
public String Watermark
{
get { return (String)GetValue(WatermarkProperty); }
set { SetValue(WatermarkProperty, value); }
}
public static readonly DependencyProperty WatermarkProperty =
DependencyProperty.Register("Watermark", typeof(String), typeof(TouchAutoComplete), new PropertyMetadata(null));
public IList ItemsSource
{
get { return (IList)GetValue(ItemsSourceProperty); }
set { SetValue(ItemsSourceProperty, value); }
}
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(IList), typeof(TouchAutoComplete), new PropertyMetadata(null));
public IList EffectiveItemsSource
{
get { return (IList)GetValue(EffectiveItemsSourceProperty); }
private set { SetValue(EffectiveItemsSourceProperty, value); }
}
public static readonly DependencyProperty EffectiveItemsSourceProperty =
DependencyProperty.Register("EffectiveItemsSource", typeof(IList), typeof(TouchAutoComplete), new PropertyMetadata(null));
public IAutoCompleteProvider AutoCompleteProvider
{
get { return (IAutoCompleteProvider)GetValue(AutoCompleteProviderProperty); }
set { SetValue(AutoCompleteProviderProperty, value); }
}
public static readonly DependencyProperty AutoCompleteProviderProperty =
DependencyProperty.Register("AutoCompleteProvider", typeof(IAutoCompleteProvider), typeof(TouchAutoComplete), new PropertyMetadata(null));
public object SelectedItem
{
get { return (object)GetValue(SelectedItemProperty); }
set { SetValue(SelectedItemProperty, value); }
}
public static readonly DependencyProperty SelectedItemProperty =
DependencyProperty.Register("SelectedItem", typeof(object), typeof(TouchAutoComplete), new PropertyMetadata(null, (d, e) => (d as TouchAutoComplete).OnSelectedItemChanged()));
public String DisplayMemberPath
{
get { return (String)GetValue(DisplayMemberPathProperty); }
set { SetValue(DisplayMemberPathProperty, value); }
}
public static readonly DependencyProperty DisplayMemberPathProperty =
DependencyProperty.Register("DisplayMemberPath", typeof(String), typeof(TouchAutoComplete), new PropertyMetadata(null));
public DataTemplate ItemTemplate
{
get { return (DataTemplate)GetValue(ItemTemplateProperty); }
set { SetValue(ItemTemplateProperty, value); }
}
public static readonly DependencyProperty ItemTemplateProperty =
DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(TouchAutoComplete), new PropertyMetadata(null));
public RelayCommand ItemSelectedCommand
{
get { return (RelayCommand)GetValue(ItemSelectedCommandProperty); }
private set { SetValue(ItemSelectedCommandProperty, value); }
}
public static readonly DependencyProperty ItemSelectedCommandProperty =
DependencyProperty.Register("ItemSelectedCommand", typeof(RelayCommand), typeof(TouchAutoComplete), new PropertyMetadata(null));
public double PopupHeight
{
get { return (double)GetValue(PopupHeightProperty); }
set { SetValue(PopupHeightProperty, value); }
}
public static readonly DependencyProperty PopupHeightProperty =
DependencyProperty.Register("PopupHeight", typeof(double), typeof(TouchAutoComplete), new PropertyMetadata(200.0));
public TouchAutoComplete()
{
AutoCompleteProvider = new AutoCompleteProvider<Object>((obj, filter) => { return obj.ToString().ToLower().StartsWith(filter.ToLower()); });
ItemSelectedCommand = new RelayCommand(() => OnSelectedItemChanged());
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_textBox = GetTemplateChild("PART_TextBox") as TextBox;
_popup = GetTemplateChild("PART_Popup") as Popup;
_listbox = GetTemplateChild("PART_ListBox") as TouchListBox;
_popup.RegisterForMouseOrTouchDown(OnPopupMouseDown);
_textBox.PreviewKeyUp += _textBox_PreviewKeyUp;
_textBox.GotFocus += _textBox_GotFocus;
_textBox.LostFocus += _textBox_LostFocus;
OnSelectedItemChanged();
}
private void OnPopupMouseDown(object sender, MouseOrTouchEventArgs e)
{
e.Handled = true;
}
private void _textBox_LostFocus(object sender, RoutedEventArgs e)
{
_popup.IsOpen = false;
}
private void _textBox_GotFocus(object sender, RoutedEventArgs e)
{
if (Text != null)
{
_textBox.CaretIndex = _textBox.Text.Length;
}
}
private void _textBox_PreviewKeyUp(object sender, KeyEventArgs e)
{
if (AutoCompleteProvider != null && ItemsSource != null)
{
EffectiveItemsSource = AutoCompleteProvider.Filter(ItemsSource, Text);
if (EffectiveItemsSource.Count > 0)
{
_popup.IsOpen = true;
_listbox.ScrollViewer.ScrollToTop();
}
else
{
_popup.IsOpen = false;
}
}
}
private void OnSelectedItemChanged()
{
if (SelectedItem != null && _textBox != null)
{
Text = SelectedItem.GetPropertyValueByPath(DisplayMemberPath).ToString();
if (Text != null)
{
_textBox.CaretIndex = _textBox.Text.Length;
}
}
if (_popup != null)
{
_popup.IsOpen = false;
}
}
static TouchAutoComplete()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TouchAutoComplete), new FrameworkPropertyMetadata(typeof(TouchAutoComplete)));
}
}
}
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