WpfPlot ignores layout padding if defined during window initialization

Describe the bug Rendering a WPF plot includes an unnecessary and undesirable margin that cannot be removed (or at least I couldn’t find a way to remove it).

To Reproduce To reproduce the problem, create a WPF project and add a window with a single WpfPlot element like this:

<Window>
    <Grid>
         <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
         <WpfPlot x:Name="testWpfPlot" Padding="0"/>
    </Grid>
</Window>

Then, configure the plot to render some signal or any plottable and then remove the ticks and attempt to change layout to remove any additional padding or extra space around the figure.

testWpfPlot.plt.Clear(scatterPlots: true);
testWpfPlot.plt.PlotBar(xs: new double[100], ys: new double[100],    // can generate some random data and plot 
            barWidth: 2, 
            xOffset: -0.5, 
            fillColor: System.Drawing.Color.SlateGray,
            outlineWidth: 0,
            label: "test");
testWpfPlot.plt.Grid(xSpacing: 2);
testWpfPlot.plt.Style(ScottPlot.Style.Gray2);
testWpfPlot.plt.AxisAuto();
testWpfPlot.plt.Ticks(displayTickLabelsX: false, displayTickLabelsY: false, displayTicksX: false, displayTicksY: false);
testWpfPlot.plt.TightenLayout(padding: 0);
testWpfPlot.plt.Frame(false);

The expectation is that the plot would render using the full available space without leaving any additional space

Screenshots

[swharden]

@sopgenorth you may also find use in your plot’s Frameless() method

https://scottplot.net/cookbook/4.1/category/axis-and-ticks/#frameless-plots

[swharden]

Hi @sopgenorth

Is there a newer recommended way of achieving this same tight layout?

Indeed! Try calling your plot’s Layout() method. Pay close attention to each of the arguments, including padding.

I created issue #1841 with the goal of adding a cookbook section to make these features easier to discover 👍