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package cirsim_fyne
import (
"fmt"
"io"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/widget"
"github.com/wcharczuk/go-chart/v2"
"github.com/wcharczuk/go-chart/v2/drawing"
)
type node struct {
widget.BaseWidget
pos fyne.Position
voltageOverTime []float64
voltageRange chart.Range
chart *canvas.Image
}
func newNode(settings io.Reader, r chart.Range) *node {
var n node
_, err := fmt.Fscanf(settings, "%f %f\n", &n.pos.X, &n.pos.Y)
if err != nil {
return nil
}
n.voltageRange = r
return &n
}
func (n *node) renderChart(voltageOverTime []float64) {
graph := chart.Chart{
Width: chartWidth,
Height: chartHeight,
ColorPalette: &nodeColorPalette{},
XAxis: chart.HideXAxis(),
YAxis: chart.YAxis{
Style: chart.Hidden(),
Range: n.voltageRange,
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: chart.LinearRange(0, float64(len(voltageOverTime))-1),
YValues: voltageOverTime,
},
},
}
writer := &chart.ImageWriter{}
graph.Render(chart.PNG, writer)
img, _ := writer.Image()
n.chart = canvas.NewImageFromImage(img)
}
type nodeColorPalette struct{}
func (*nodeColorPalette) BackgroundColor() drawing.Color {
return drawing.ColorTransparent
}
func (*nodeColorPalette) BackgroundStrokeColor() drawing.Color {
return drawing.ColorTransparent
}
func (*nodeColorPalette) CanvasColor() drawing.Color {
return drawing.Color{
R: voltageCanvasR,
G: voltageCanvasG,
B: voltageCanvasB,
A: voltageCanvasA,
}
}
func (*nodeColorPalette) CanvasStrokeColor() drawing.Color {
return drawing.ColorTransparent
}
func (*nodeColorPalette) AxisStrokeColor() drawing.Color {
return drawing.ColorTransparent
}
func (*nodeColorPalette) TextColor() drawing.Color {
return drawing.ColorTransparent
}
func (*nodeColorPalette) GetSeriesColor(index int) drawing.Color {
return drawing.Color{R: voltageR, G: voltageG, B: voltageB, A: voltageA}
}
func (n *node) CreateRenderer() fyne.WidgetRenderer { return n }
func (n *node) Layout(s fyne.Size) {
n.chart.Resize(s)
n.chart.Move(fyne.NewPos(0, 0))
}
func (n *node) MinSize() fyne.Size { return n.chart.MinSize() }
func (n *node) Refresh() {}
func (n *node) Destroy() {}
func (n *node) Objects() []fyne.CanvasObject {
return []fyne.CanvasObject{n.chart}
}
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