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tomo-old/elements/basic/progressbar.go

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package basic
import "image"
import "git.tebibyte.media/sashakoshka/tomo/theme"
import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/elements/core"
// ProgressBar displays a visual indication of how far along a task is.
type ProgressBar struct {
*core.Core
core core.CoreControl
progress float64
}
// NewProgressBar creates a new progress bar displaying the given progress
// level.
func NewProgressBar (progress float64) (element *ProgressBar) {
element = &ProgressBar { progress: progress }
element.Core, element.core = core.NewCore(element)
element.core.SetMinimumSize(theme.Padding() * 2, theme.Padding() * 2)
return
}
// Resize resizes the progress bar.
func (element *ProgressBar) Resize (width, height int) {
element.core.AllocateCanvas(width, height)
element.draw()
return
}
// SetProgress sets the progress level of the bar.
func (element *ProgressBar) SetProgress (progress float64) {
if progress == element.progress { return }
element.progress = progress
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
}
}
func (element *ProgressBar) draw () {
bounds := element.core.Bounds()
artist.FillRectangle (
element.core,
theme.SunkenPattern(),
bounds)
meterBounds := image.Rect (
bounds.Min.X + 2, bounds.Min.Y + 2,
bounds.Min.X - 1 + int(float64(bounds.Dx()) * element.progress),
bounds.Dy() - 1)
artist.FillRectangle (
element.core,
theme.AccentPattern(),
meterBounds)
}