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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
// Package bargraph provides a simple plotting widget.
package bargraph
import (
"github.com/gcla/gowid"
"github.com/gcla/gowid/widgets/columns"
"github.com/gcla/gowid/widgets/fill"
"github.com/gcla/gowid/widgets/overlay"
"github.com/gcla/gowid/widgets/pile"
)
//======================================================================
type IBarGraph interface {
GetData() [][]int
GetAttrs() []gowid.IColor
GetMax() int
}
type IWidget interface {
gowid.IWidget
IBarGraph
}
type Widget struct {
Data [][]int
Max int
Attrs []gowid.IColor
gowid.RejectUserInput
gowid.NotSelectable
}
func New(atts []gowid.IColor) *Widget {
res := &Widget{}
res.Data = make([][]int, 0)
res.Max = 0
res.Attrs = atts
var _ gowid.IWidget = res
return res
}
func (w *Widget) String() string {
return "bargraph"
}
func (w *Widget) GetData() [][]int {
return w.Data
}
func (w *Widget) SetData(l [][]int, max int, app gowid.IApp) {
w.Data = l
w.Max = max
}
func (w *Widget) GetAttrs() []gowid.IColor {
return w.Attrs
}
func (w *Widget) GetMax() int {
return w.Max
}
func (w *Widget) RenderSize(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.IRenderBox {
return RenderSize(w, size, focus, app)
}
func (w *Widget) Render(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.ICanvas {
return Render(w, size, focus, app)
}
//''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
func RenderSize(w gowid.IWidget, size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.IRenderBox {
return gowid.CalculateRenderSizeFallback(w, size, focus, app)
}
func Render(w IBarGraph, size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.ICanvas {
_, ok := size.(gowid.IRenderBox)
if !ok {
panic(gowid.WidgetSizeError{Widget: w, Size: size, Required: "gowid.IRenderBox"})
}
weight1 := gowid.RenderWithWeight{1}
bgTCellColor := gowid.IColorToTCell(w.GetAttrs()[0], gowid.ColorDefault, app.GetColorMode())
// TODO - check case when data is empty
dataIdxLimit := 0
if len(w.GetData()) > 0 {
dataIdxLimit = len(w.GetData()[0])
}
dataWidgets := make([]*columns.Widget, dataIdxLimit)
for dataIdx := 0; dataIdx < dataIdxLimit; dataIdx++ {
cols := make([]gowid.IContainerWidget, len(w.GetData()))
for i, d := range w.GetData() {
datum := d[dataIdx]
dataTCellColor := gowid.IColorToTCell(w.GetAttrs()[(i%(len(w.GetAttrs())-1))+1], gowid.ColorDefault, app.GetColorMode())
bar := pile.New([]gowid.IContainerWidget{
&gowid.ContainerWidget{
fill.NewSolidFromCell(
gowid.Cell{},
),
gowid.RenderWithWeight{w.GetMax() - datum},
},
// Use fg as background because I'm using spaces
&gowid.ContainerWidget{
fill.NewSolidFromCell(
gowid.MakeCell(
' ',
gowid.ColorNone,
dataTCellColor,
gowid.StyleNone),
),
gowid.RenderWithWeight{datum}},
})
cols[i] = &gowid.ContainerWidget{bar, weight1}
}
dataWidgets[dataIdx] = columns.New(cols)
}
var res gowid.IWidget = fill.NewSolidFromCell(
gowid.MakeCell(
' ',
gowid.ColorNone,
bgTCellColor,
gowid.StyleNone),
)
for _, dataWidget := range dataWidgets {
res = overlay.New(
dataWidget,
res,
gowid.VAlignMiddle{}, gowid.RenderWithRatio{R: 1.0},
gowid.HAlignMiddle{}, gowid.RenderWithRatio{R: 1.0},
)
}
return res.Render(size, focus, app)
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End:
|
