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tomo-old/elements/basic/checkbox.go
2023-02-27 17:00:28 -05:00

193 lines
5.0 KiB
Go

package basicElements
import "image"
import "git.tebibyte.media/sashakoshka/tomo/input"
import "git.tebibyte.media/sashakoshka/tomo/theme"
import "git.tebibyte.media/sashakoshka/tomo/config"
import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/textdraw"
import "git.tebibyte.media/sashakoshka/tomo/elements/core"
// Checkbox is a toggle-able checkbox with a label.
type Checkbox struct {
*core.Core
*core.FocusableCore
core core.CoreControl
focusableControl core.FocusableCoreControl
drawer textdraw.Drawer
pressed bool
checked bool
text string
config config.Wrapped
theme theme.Wrapped
onToggle func ()
}
// NewCheckbox creates a new cbeckbox with the specified label text.
func NewCheckbox (text string, checked bool) (element *Checkbox) {
element = &Checkbox { checked: checked }
element.theme.Case = theme.C("basic", "checkbox")
element.Core, element.core = core.NewCore(element.draw)
element.FocusableCore,
element.focusableControl = core.NewFocusableCore(element.redo)
element.SetText(text)
return
}
func (element *Checkbox) HandleMouseDown (x, y int, button input.Button) {
if !element.Enabled() { return }
element.Focus()
element.pressed = true
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
}
}
func (element *Checkbox) HandleMouseUp (x, y int, button input.Button) {
if button != input.ButtonLeft || !element.pressed { return }
element.pressed = false
within := image.Point { x, y }.
In(element.Bounds())
if within {
element.checked = !element.checked
}
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
}
if within && element.onToggle != nil {
element.onToggle()
}
}
func (element *Checkbox) HandleMouseMove (x, y int) { }
func (element *Checkbox) HandleMouseScroll (x, y int, deltaX, deltaY float64) { }
func (element *Checkbox) HandleKeyDown (key input.Key, modifiers input.Modifiers) {
if key == input.KeyEnter {
element.pressed = true
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
}
}
}
func (element *Checkbox) HandleKeyUp (key input.Key, modifiers input.Modifiers) {
if key == input.KeyEnter && element.pressed {
element.pressed = false
element.checked = !element.checked
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
}
if element.onToggle != nil {
element.onToggle()
}
}
}
// OnToggle sets the function to be called when the checkbox is toggled.
func (element *Checkbox) OnToggle (callback func ()) {
element.onToggle = callback
}
// Value reports whether or not the checkbox is currently checked.
func (element *Checkbox) Value () (checked bool) {
return element.checked
}
// SetEnabled sets whether this checkbox can be toggled or not.
func (element *Checkbox) SetEnabled (enabled bool) {
element.focusableControl.SetEnabled(enabled)
}
// SetText sets the checkbox's label text.
func (element *Checkbox) SetText (text string) {
if element.text == text { return }
element.text = text
element.drawer.SetText([]rune(text))
element.updateMinimumSize()
if element.core.HasImage () {
element.draw()
element.core.DamageAll()
}
}
// SetTheme sets the element's theme.
func (element *Checkbox) SetTheme (new theme.Theme) {
if new == element.theme.Theme { return }
element.theme.Theme = new
element.drawer.SetFace (element.theme.FontFace (
theme.FontStyleRegular,
theme.FontSizeNormal))
element.updateMinimumSize()
element.redo()
}
// SetConfig sets the element's configuration.
func (element *Checkbox) SetConfig (new config.Config) {
if new == element.config.Config { return }
element.config.Config = new
element.updateMinimumSize()
element.redo()
}
func (element *Checkbox) updateMinimumSize () {
textBounds := element.drawer.LayoutBounds()
if element.text == "" {
element.core.SetMinimumSize(textBounds.Dy(), textBounds.Dy())
} else {
margin := element.theme.Margin(theme.PatternBackground)
element.core.SetMinimumSize (
textBounds.Dy() + margin.X + textBounds.Dx(),
textBounds.Dy())
}
}
func (element *Checkbox) redo () {
if element.core.HasImage () {
element.draw()
element.core.DamageAll()
}
}
func (element *Checkbox) draw () {
bounds := element.Bounds()
boxBounds := image.Rect(0, 0, bounds.Dy(), bounds.Dy()).Add(bounds.Min)
state := theme.State {
Disabled: !element.Enabled(),
Focused: element.Focused(),
Pressed: element.pressed,
On: element.checked,
}
backgroundPattern := element.theme.Pattern (
theme.PatternBackground, state)
backgroundPattern.Draw(element.core, bounds)
pattern := element.theme.Pattern(theme.PatternButton, state)
artist.DrawBounds(element.core, pattern, boxBounds)
textBounds := element.drawer.LayoutBounds()
margin := element.theme.Margin(theme.PatternBackground)
offset := bounds.Min.Add(image.Point {
X: bounds.Dy() + margin.X,
})
offset.Y -= textBounds.Min.Y
offset.X -= textBounds.Min.X
foreground := element.theme.Color(theme.ColorForeground, state)
element.drawer.Draw(element.core, foreground, offset)
}