ScottPlot.NET
Custom Right-Click Menu - ScottPlot FAQ
How to add a custom right-click menu to ScottPlot user controls

User controls have a RightClicked event handler you can add a custom event to. This event could open a context menu, but it could also perform other actions.

Windows Forms

To customize ScottPlot’s right-click menu, unsubscribe from the default right-click event add add your own event method to be called whenever the user right-clicks the plot.

Download this example from GitHub

public Form1()
{
    InitializeComponent();
    
    // unsubscribe from the default right-click menu event
    formsPlot1.RightClicked -= formsPlot1.DefaultRightClickEvent;
    
    // add a custom right-click action
    formsPlot1.RightClicked += CustomRightClickEvent;
}

private void CustomRightClickEvent(object sender, EventArgs e)
{
    ContextMenuStrip customMenu = new ContextMenuStrip();
    customMenu.Items.Add(new ToolStripMenuItem("Add Sine Wave", null, new EventHandler(AddSine)));
    customMenu.Items.Add(new ToolStripMenuItem("Clear Plot", null, new EventHandler(ClearPlot)));
    customMenu.Show(Cursor.Position);
}

private void AddSine(object sender, EventArgs e)
{
    Random rand = new Random();
    double[] data = ScottPlot.DataGen.Sin(51, phase: rand.NextDouble() * 1000);
    formsPlot1.Plot.AddSignal(data);
    formsPlot1.Plot.AxisAuto();
    formsPlot1.Render();
}

private void ClearPlot(object sender, EventArgs e)
{
    formsPlot1.Plot.Clear();
    formsPlot1.Plot.AxisAuto();
    formsPlot1.Render();
}

WPF

To customize ScottPlot’s right-click menu, unsubscribe from the default right-click event add add your own event method to be called whenever the user right-clicks the plot.

Download this example from GitHub

public MainWindow()
{
    InitializeComponent();

    // unsubscribe from the default right-click menu event
    WpfPlot1.RightClicked -= WpfPlot1.DefaultRightClickEvent;

    // add a custom right-click action
    WpfPlot1.RightClicked += DeployCustomMenu;
}

private void DeployCustomMenu(object sender, EventArgs e)
{
    MenuItem addSinMenuItem = new MenuItem() { Header = "Add Sine Wave" };
    addSinMenuItem.Click += AddSine;

    MenuItem clearPlotMenuItem = new MenuItem() { Header = "Clear Plot" };
    clearPlotMenuItem.Click += ClearPlot;

    ContextMenu rightClickMenu = new ContextMenu();
    rightClickMenu.Items.Add(addSinMenuItem);
    rightClickMenu.Items.Add(clearPlotMenuItem);

    rightClickMenu.IsOpen = true;
}

private void AddSine(object sender, RoutedEventArgs e)
{
    Random rand = new Random();
    double[] data = ScottPlot.DataGen.Sin(51, phase: rand.NextDouble() * 1000);
    WpfPlot1.Plot.AddSignal(data);
    WpfPlot1.Plot.AxisAuto();
}

private void ClearPlot(object sender, RoutedEventArgs e)
{
    WpfPlot1.Plot.Clear();
    WpfPlot1.Plot.AxisAuto();
}

Console Applications

Console applications can create a ScottPlot.Plot and launch it in a GUI using the ScottPlot.FormsPlotViewer. The following code demonstrates how to interact with the right-click menu in the pop-up interactive plot viewer.

This code disables the default right-click menu, but a custom right-click menu can be enabled by mimicing the WinForms example above.

// create a plot
ScottPlot.Plot plt = new();
plt.AddSignal(ScottPlot.DataGen.Sin(51));
plt.AddSignal(ScottPlot.DataGen.Cos(51));

// launch the plot in a pop-up plot viewer
ScottPlot.FormsPlotViewer viewer = new(plt);

// disable the default right-click menu event
viewer.formsPlot1.RightClicked -= viewer.formsPlot1.DefaultRightClickEvent;

viewer.ShowDialog();