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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.
// A demonstration of gowid's overlay and fill widgets.
package main
import (
"github.com/gcla/gowid"
"github.com/gcla/gowid/examples"
"github.com/gcla/gowid/gwutil"
"github.com/gcla/gowid/widgets/fill"
"github.com/gcla/gowid/widgets/overlay"
"github.com/gcla/gowid/widgets/styled"
tcell "github.com/gdamore/tcell/v2"
log "github.com/sirupsen/logrus"
)
//======================================================================
var ov *overlay.Widget
var ovh, ovw int = 50, 50
//======================================================================
type handler struct{}
func (h handler) UnhandledInput(app gowid.IApp, ev interface{}) bool {
handled := false
if evk, ok := ev.(*tcell.EventKey); ok {
handled = true
if evk.Key() == tcell.KeyCtrlC || evk.Key() == tcell.KeyEsc || evk.Rune() == 'q' || evk.Rune() == 'Q' {
app.Quit()
} else if evk.Key() == tcell.KeyUp {
ovh = gwutil.Min(100, ovh+1)
ov.SetHeight(gowid.RenderWithRatio{R: float64(ovh) / 100.0}, app)
} else if evk.Key() == tcell.KeyDown {
ovh = gwutil.Max(0, ovh-1)
ov.SetHeight(gowid.RenderWithRatio{R: float64(ovh) / 100.0}, app)
} else if evk.Key() == tcell.KeyRight {
ovw = gwutil.Min(100, ovw+1)
ov.SetWidth(gowid.RenderWithRatio{R: float64(ovw) / 100.0}, app)
} else if evk.Key() == tcell.KeyLeft {
ovw = gwutil.Max(0, ovw-1)
ov.SetWidth(gowid.RenderWithRatio{R: float64(ovw) / 100.0}, app)
} else {
handled = false
}
}
return handled
}
//======================================================================
func main() {
f := examples.RedirectLogger("overlay1.log")
defer f.Close()
palette := gowid.Palette{
"red": gowid.MakePaletteEntry(gowid.ColorDefault, gowid.ColorRed),
}
top := styled.New(fill.New(' '), gowid.MakePaletteRef("red"))
bottom := fill.New(' ')
ov = overlay.New(top, bottom,
gowid.VAlignMiddle{}, gowid.RenderWithRatio{R: 0.5},
gowid.HAlignMiddle{}, gowid.RenderWithRatio{R: 0.5})
app, err := gowid.NewApp(gowid.AppArgs{
View: ov,
Palette: &palette,
Log: log.StandardLogger(),
})
examples.ExitOnErr(err)
app.MainLoop(handler{})
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End:
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