CODEWITHSUNDEEP
c#.netwinformschartsvisualization
teh_loraxx
teh_loraxx

Reputation: 1

Relative chart vs axes coordinates in WinForms Annotation Groups

I have a lot of annotations in a chart I need to keep track of. So I was trying to use Annotation Groups. I've been using the AnchorX property to anchor the annotations to data points, and it has worked fine for me. However, I get some really weird results when I try and use an annotation group.

I suspect it has something to do with relative vs axes coordinates, but the Microsoft documentation does a horrible job at explaining the difference between them.

Based on this answer, I managed to make the annotations actually show by setting the size and everything, but it still doesn't explain the coordinate system within the group.

AnnotationGroup group = new AnnotationGroup()
{
    AxisX = chart1.ChartAreas[0].AxisX,
    AxisY = chart1.ChartAreas[0].AxisY,
    ClipToChartArea = chart1.ChartAreas[0].Name,
    IsSizeAlwaysRelative = false,
    AnchorX = 50,
    AnchorY = 50,
    Width = 50,
    Height = 50
};
var textAnnotation = new TextAnnotation
{
    AnchorX = 50,
    AnchorY = 50,
    //Name = _phaseName,
    Text = "P",
    //Tag = phase,
    AllowTextEditing = true,
    Font = new System.Drawing.Font("Arial", 24),
    IsSizeAlwaysRelative = false,
    Alignment = ContentAlignment.MiddleCenter,
    ClipToChartArea = chart1.ChartAreas[0].Name,
    AllowAnchorMoving = true,
    Visible = true,
    IsMultiline = false
};
group.Annotations.Add(textAnnotation);
chart1.Annotations.Add(group);

I tried making a 100x100 chart and putting the group in the middle. Made the size of the group 50x50. Then putting the annotation in (50,50) I was hoping it would be in the middle of the group, but what I get is pretty inconsistent. I am really confused and don't understand if relative means pixel-based or if it's based on something else.

Thank you.

Upvotes: 0

Views: 20

Answers (0)

Related Questions