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using RealTimeGraphX.EventArguments;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
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;
namespace RealTimeGraphX.WPF
{
/// <summary>
/// Represents a horizontal/vertical graph axis component.
/// </summary>
/// <seealso cref="RealTimeGraphX.WPF.WpfGraphComponentBase" />
public class WpfGraphAxisControl : WpfGraphComponentBase
{
private ItemsControl _items_control;
private WpfGraphAxisPanel _axisPanel;
/// <summary>
/// Initializes the <see cref="WpfGraphAxisControl"/> class.
/// </summary>
static WpfGraphAxisControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(WpfGraphAxisControl), new FrameworkPropertyMetadata(typeof(WpfGraphAxisControl)));
}
/// <summary>
/// Gets or sets the control orientation.
/// </summary>
public Orientation Orientation
{
get { return (Orientation)GetValue(OrientationProperty); }
set { SetValue(OrientationProperty, value); }
}
public static readonly DependencyProperty OrientationProperty =
DependencyProperty.Register("Orientation", typeof(Orientation), typeof(WpfGraphAxisControl), new PropertyMetadata(Orientation.Vertical));
/// <summary>
/// Gets or sets the tick item template.
/// </summary>
public DataTemplate ItemTemplate
{
get { return (DataTemplate)GetValue(ItemTemplateProperty); }
set { SetValue(ItemTemplateProperty, value); }
}
public static readonly DependencyProperty ItemTemplateProperty =
DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(WpfGraphAxisControl), new PropertyMetadata(null));
/// <summary>
/// Gets or sets the tick items.
/// </summary>
internal ObservableCollection<WpfGraphAxisTickData> Items
{
get { return (ObservableCollection<WpfGraphAxisTickData>)GetValue(ItemsProperty); }
set { SetValue(ItemsProperty, value); }
}
public static readonly DependencyProperty ItemsProperty =
DependencyProperty.Register("Items", typeof(ObservableCollection<WpfGraphAxisTickData>), typeof(WpfGraphAxisControl), new PropertyMetadata(null));
/// <summary>
/// Gets or sets the number of ticks to display on the control.
/// </summary>
public int Ticks
{
get { return (int)GetValue(TicksProperty); }
set { SetValue(TicksProperty, value); }
}
public static readonly DependencyProperty TicksProperty =
DependencyProperty.Register("Ticks", typeof(int), typeof(WpfGraphAxisControl), new PropertyMetadata(9, (d, e) => (d as WpfGraphAxisControl).OnTicksChanged()));
/// <summary>
/// Gets or sets the string format which is used to format the ticks value.
/// </summary>
public String StringFormat
{
get { return (String)GetValue(StringFormatProperty); }
set { SetValue(StringFormatProperty, value); }
}
public static readonly DependencyProperty StringFormatProperty =
DependencyProperty.Register("StringFormat", typeof(String), typeof(WpfGraphAxisControl), new PropertyMetadata(null));
/// <summary>
/// When overridden in a derived class, is invoked whenever application code or internal processes call <see cref="M:System.Windows.FrameworkElement.ApplyTemplate" />.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_items_control = GetTemplateChild("PART_ItemsControl") as ItemsControl;
_items_control.Loaded += (x, e) =>
{
ItemsPresenter itemsPresenter = GetVisualChild<ItemsPresenter>(_items_control);
_axisPanel = VisualTreeHelper.GetChild(itemsPresenter, 0) as WpfGraphAxisPanel;
};
OnTicksChanged();
}
private static T GetVisualChild<T>(DependencyObject parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
/// <summary>
/// Called when the <see cref="Ticks"/> property has changed.
/// </summary>
protected virtual void OnTicksChanged()
{
Items = new ObservableCollection<WpfGraphAxisTickData>(Enumerable.Range(0, Ticks).Select(x => new WpfGraphAxisTickData()));
Controller?.RequestVirtualRangeChange();
_axisPanel?.UpdatePanel();
}
protected override void OnControllerChanged(IGraphController oldController, IGraphController newController)
{
base.OnControllerChanged(oldController, newController);
if (newController != null)
{
newController.RequestVirtualRangeChange();
}
}
/// <summary>
/// Handles the <see cref="IGraphController.VirtualRangeChanged"/> event.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event arguments.</param>
protected override void OnVirtualRangeChanged(object sender, RangeChangedEventArgs e)
{
InvokeUI(() =>
{
if (Orientation == Orientation.Vertical)
{
if (Items != null)
{
var steps = e.MinimumY.CreateRange(e.MinimumY, e.MaximumY, Ticks).Reverse().ToList();
for (int i = 0; i < steps.Count; i++)
{
var tick_data = Items[i];
tick_data.Data = steps[i];
tick_data.DisplayText = tick_data.Data.ToString(StringFormat);
tick_data.IsFirst = i == 0;
tick_data.IsLast = i == steps.Count - 1;
tick_data.IsEven = i % 2 == 0;
}
}
}
else
{
if (Items != null)
{
var steps = e.MinimumX.CreateRange(e.MinimumX, e.MaximumX, Ticks).ToList();
for (int i = 0; i < steps.Count; i++)
{
var tick_data = Items[i];
tick_data.Data = steps[i];
tick_data.DisplayText = tick_data.Data.ToString(StringFormat);
tick_data.IsFirst = i == 0;
tick_data.IsLast = i == steps.Count - 1;
tick_data.IsEven = i % 2 == 0;
}
}
}
});
}
}
}
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