Demonstrates how to undo/redo Zoom and Pan (Zoom History) by using the ZoomHistoryManager.

• The ZoomHistoryManager is attached to the chart via the SciChartSurface.ZoomHistoryManager property.
• All zoom, pan operations then become tracked, and you can Undo or Redo zoom via the ZoomHistoryManager.Undo and ZoomHistoryManager.Redo methods.
• In MVVM Applications, you can also bind to and execute the ZoomHistoryManager.UndoCommand and ZoomHistoryManager.RedoCommand.

// SimpleUndoRedoView.xaml

<UserControl x:Class="SciChart.Examples.Examples.ZoomHistory.SimpleUndoRedoView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:ext="http://schemas.abtsoftware.co.uk/scichart/exampleExternals"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:s="http://schemas.abtsoftware.co.uk/scichart"
             Loaded="LineChartExampleView_OnLoaded"
             d:DesignHeight="400"
             d:DesignWidth="600"
             mc:Ignorable="d">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <!--  The SciChartInteractionToolbar adds zoom, pan, zoom extents and rotate functionality  -->
        <!--  to the chart and is included for example purposes.  -->
        <!--  If you wish to know how to zoom and pan a chart then do a search for Zoom Pan in the Examples suite!  -->
        <ext:SciChartInteractionToolbar TargetSurface="{Binding ElementName=SciChart}">

            <Button Command="{Binding ElementName=SciChart,
                                      Path=ZoomHistoryManager.UndoCommand}"
                    Content="UN"
                    FontSize="11"
                    Padding="0"
                    Style="{StaticResource DefaultButtonStyle}"
                    ToolTipService.ToolTip="UNDO Zoom" />

            <Button Command="{Binding ElementName=SciChart,
                                      Path=ZoomHistoryManager.RedoCommand}"
                    Content="RE"
                    FontSize="11"
                    Padding="0"
                    Style="{StaticResource DefaultButtonStyle}"
                    ToolTipService.ToolTip="REDO Zoom" />
            
        </ext:SciChartInteractionToolbar>

        <!--  Create the chart surface  -->
        <s:SciChartSurface Name="SciChart"
                           Grid.Column="1"
                           BorderThickness="0"
                           Padding="0">

            <!--  Declare RenderableSeries  -->
            <s:SciChartSurface.RenderableSeries>
                <s:FastLineRenderableSeries x:Name="LineRenderSeries"
                                            Stroke="#FF99EE99"
                                            StrokeThickness="2"
                                            XAxisId="XId"
                                            YAxisId="YId" />
            </s:SciChartSurface.RenderableSeries>

            <!--  Create an X Axis with Growby  -->
            <s:SciChartSurface.XAxis>
                <s:NumericAxis DrawMajorBands="True"
                               FlipCoordinates="True"
                               GrowBy="0.1, 0.1"
                               Id="XId"
                               ScientificNotation="None"
                               TextFormatting="#.############" />
            </s:SciChartSurface.XAxis>

            <!--  Create a Y Axis with Growby. Optional bands give a cool look and feel for minimal performance impact  -->
            <s:SciChartSurface.YAxis>
                <s:NumericAxis DrawMajorBands="True" Id="YId" />
            </s:SciChartSurface.YAxis>

            <s:SciChartSurface.ChartModifier>
                <s:ModifierGroup>
                    <s:MouseWheelZoomModifier/>
                    <s:XAxisDragModifier/>
                    <s:YAxisDragModifier/>
                </s:ModifierGroup>
            </s:SciChartSurface.ChartModifier>
            
        </s:SciChartSurface>

    </Grid>
</UserControl>

// SimpleUndoRedoView.xaml.cs

// *************************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//  
// Web: http://www.scichart.com
//   Support: support@scichart.com
//   Sales:   sales@scichart.com
// 
// SimpleUndoRedoView.xaml.cs is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use. 
// 
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied. 
// *************************************************************************************
using System.Windows;
using System.Windows.Controls;
using SciChart.Charting.HistoryManagers;
using SciChart.Charting.Model.DataSeries;
using SciChart.Examples.ExternalDependencies.Data;

namespace SciChart.Examples.Examples.ZoomHistory
{
    public partial class SimpleUndoRedoView : UserControl
    {
        public SimpleUndoRedoView()
        {
            InitializeComponent();
        }

        private void LineChartExampleView_OnLoaded(object sender, RoutedEventArgs e)
        {
            SciChart.ZoomHistoryManager = new ZoomHistoryManager();

            // Create a DataSeries of type X=double, Y=double
            var dataSeries = new XyDataSeries<double, double>();

            LineRenderSeries.DataSeries = dataSeries;

            var data = DataManager.Instance.GetFourierSeries(1.0, 0.1);

            // Append data to series. SciChart automatically redraws
            dataSeries.Append(data.XData, data.YData);

            SciChart.ZoomExtents();
        }
    }
}

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