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tomo-old/elements/spacer.go

83 lines
2.2 KiB
Go

package elements
import "git.tebibyte.media/sashakoshka/tomo"
import "git.tebibyte.media/sashakoshka/tomo/canvas"
import "git.tebibyte.media/sashakoshka/tomo/default/theme"
import "git.tebibyte.media/sashakoshka/tomo/default/config"
// Spacer can be used to put space between two elements..
type Spacer struct {
entity tomo.Entity
line bool
config config.Wrapped
theme theme.Wrapped
}
// NewSpacer creates a new spacer. If line is set to true, the spacer will be
// filled with a line color, and if compressed to its minimum width or height,
// will appear as a line.
func NewSpacer (line bool) (element *Spacer) {
element = &Spacer { line: line }
element.entity = tomo.NewEntity(element)
element.theme.Case = tomo.C("tomo", "spacer")
element.updateMinimumSize()
return
}
// Entity returns this element's entity.
func (element *Spacer) Entity () tomo.Entity {
return element.entity
}
// Draw causes the element to draw to the specified destination canvas.
func (element *Spacer) Draw (destination canvas.Canvas) {
bounds := element.entity.Bounds()
if element.line {
pattern := element.theme.Pattern (
tomo.PatternLine,
tomo.State { })
pattern.Draw(destination, bounds)
} else {
pattern := element.theme.Pattern (
tomo.PatternBackground,
tomo.State { })
pattern.Draw(destination, bounds)
}
}
/// SetLine sets whether or not the spacer will appear as a colored line.
func (element *Spacer) SetLine (line bool) {
if element.line == line { return }
element.line = line
element.updateMinimumSize()
element.entity.Invalidate()
}
// SetTheme sets the element's theme.
func (element *Spacer) SetTheme (new tomo.Theme) {
if new == element.theme.Theme { return }
element.theme.Theme = new
element.entity.Invalidate()
}
// SetConfig sets the element's configuration.
func (element *Spacer) SetConfig (new tomo.Config) {
if new == element.config.Config { return }
element.config.Config = new
element.entity.Invalidate()
}
func (element *Spacer) updateMinimumSize () {
if element.line {
padding := element.theme.Padding(tomo.PatternLine)
element.entity.SetMinimumSize (
padding.Horizontal(),
padding.Vertical())
} else {
element.entity.SetMinimumSize(1, 1)
}
}