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tomo-old/elements/basic/checkbox.go

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package basicElements
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import "image"
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import "git.tebibyte.media/sashakoshka/tomo/input"
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import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/config"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/elements/core"
// Checkbox is a toggle-able checkbox with a label.
type Checkbox struct {
*core.Core
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*core.FocusableCore
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core core.CoreControl
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focusableControl core.FocusableCoreControl
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drawer artist.TextDrawer
pressed bool
checked bool
text string
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config config.Wrapped
theme theme.Wrapped
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onToggle func ()
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}
// NewCheckbox creates a new cbeckbox with the specified label text.
func NewCheckbox (text string, checked bool) (element *Checkbox) {
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element = &Checkbox { checked: checked }
element.theme.Case = theme.C("basic", "checkbox")
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element.Core, element.core = core.NewCore(element.draw)
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element.FocusableCore,
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element.focusableControl = core.NewFocusableCore(element.redo)
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element.SetText(text)
return
}
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func (element *Checkbox) HandleMouseDown (x, y int, button input.Button) {
if !element.Enabled() { return }
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element.Focus()
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element.pressed = true
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
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}
}
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func (element *Checkbox) HandleMouseUp (x, y int, button input.Button) {
if button != input.ButtonLeft || !element.pressed { return }
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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()
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}
if within && element.onToggle != nil {
element.onToggle()
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}
}
func (element *Checkbox) HandleMouseMove (x, y int) { }
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func (element *Checkbox) HandleMouseScroll (x, y int, deltaX, deltaY float64) { }
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func (element *Checkbox) HandleKeyDown (key input.Key, modifiers input.Modifiers) {
if key == input.KeyEnter {
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element.pressed = true
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
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}
}
}
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func (element *Checkbox) HandleKeyUp (key input.Key, modifiers input.Modifiers) {
if key == input.KeyEnter && element.pressed {
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element.pressed = false
element.checked = !element.checked
if element.core.HasImage() {
element.draw()
element.core.DamageAll()
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}
if element.onToggle != nil {
element.onToggle()
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}
}
}
// OnToggle sets the function to be called when the checkbox is toggled.
func (element *Checkbox) OnToggle (callback func ()) {
element.onToggle = callback
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}
// 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) {
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element.focusableControl.SetEnabled(enabled)
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}
// 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))
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element.updateMinimumSize()
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if element.core.HasImage () {
element.draw()
element.core.DamageAll()
}
}
// SetTheme sets the element's theme.
func (element *Checkbox) SetTheme (new theme.Theme) {
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if new == element.theme.Theme { return }
element.theme.Theme = new
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element.drawer.SetFace (element.theme.FontFace (
theme.FontStyleRegular,
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theme.FontSizeNormal))
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element.updateMinimumSize()
element.redo()
}
// SetConfig sets the element's configuration.
func (element *Checkbox) SetConfig (new config.Config) {
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if new == element.config.Config { return }
element.config.Config = new
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element.updateMinimumSize()
element.redo()
}
func (element *Checkbox) updateMinimumSize () {
textBounds := element.drawer.LayoutBounds()
if element.text == "" {
element.core.SetMinimumSize(textBounds.Dy(), textBounds.Dy())
} else {
element.core.SetMinimumSize (
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textBounds.Dy() + element.config.Padding() + textBounds.Dx(),
textBounds.Dy())
}
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}
func (element *Checkbox) redo () {
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if element.core.HasImage () {
element.draw()
element.core.DamageAll()
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}
}
func (element *Checkbox) draw () {
bounds := element.Bounds()
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boxBounds := image.Rect(0, 0, bounds.Dy(), bounds.Dy()).Add(bounds.Min)
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state := theme.PatternState {
Disabled: !element.Enabled(),
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Focused: element.Focused(),
Pressed: element.pressed,
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On: element.checked,
}
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backgroundPattern := element.theme.Pattern (
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theme.PatternBackground, state)
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artist.FillRectangle(element, backgroundPattern, bounds)
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pattern := element.theme.Pattern(theme.PatternButton, state)
artist.FillRectangle(element, pattern, boxBounds)
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textBounds := element.drawer.LayoutBounds()
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offset := bounds.Min.Add(image.Point {
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X: bounds.Dy() + element.config.Padding(),
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})
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offset.Y -= textBounds.Min.Y
offset.X -= textBounds.Min.X
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foreground := element.theme.Pattern(theme.PatternForeground, state)
element.drawer.Draw(element, foreground, offset)
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}