Add optional property XLim to Lines plot (#54)

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [[unpublished]](https://github.com/mlange-42/arche-pixel/compare/v0.9.0...main)
+
+### Features
+
+* Adds optional property `XLim` to `Lines` plot (#54)
+
 ## [[v0.9.0]](https://github.com/mlange-42/arche-pixel/compare/v0.8.1...v0.9.0)
 
 ### Features

plot/lines.go

@@ -25,6 +25,7 @@ type Lines struct {
 	Observer observer.Table // Observer providing a data series for lines.
 	X        string         // X column name. Optional. Defaults to row index.
 	Y        []string       // Y column names. Optional. Defaults to all but X column.
+	XLim     [2]float64     // X axis limits. Optional, default auto.
 	YLim     [2]float64     // Y axis limits. Optional, default auto.
 	Labels   Labels         // Labels for plot and axes. Optional.
 
@@ -101,6 +102,11 @@ func (l *Lines) Draw(w *ecs.World, win *opengl.Window) {
 		p.Y.Max = l.YLim[1]
 	}
 
+	if l.XLim[0] != 0 || l.XLim[1] != 0 {
+		p.X.Min = l.XLim[0]
+		p.Y.Max = l.XLim[1]
+	}
+
 	p.Legend = plot.NewLegend()
 	p.Legend.TextStyle.Font.Variant = "Mono"
 

plot/lines_test.go

@@ -52,6 +52,7 @@ func TestLines(t *testing.T) {
 	m.AddUISystem((&window.Window{}).
 		With(&plot.Lines{
 			Observer: &TableObserver{},
+			XLim:     [2]float64{0, 30},
 			YLim:     [2]float64{0.5, 0.6},
 		}))