mirror of https://github.com/anoshenko/rui.git
328 lines
9.7 KiB
Go
328 lines
9.7 KiB
Go
package rui
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import (
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"strings"
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)
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// CheckboxChangedEvent is the constant for "checkbox-event" property tag.
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//
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// Used by `Checkbox`.
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// Event occurs when the checkbox becomes checked/unchecked.
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//
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// General listener format:
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//
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// func(checkbox rui.Checkbox, checked bool)
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//
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// where:
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// - checkbox - Interface of a checkbox which generated this event,
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// - checked - Checkbox state.
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//
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// Allowed listener formats:
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//
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// func(checkbox rui.Checkbox)
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// func(checked bool)
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// func()
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const CheckboxChangedEvent PropertyName = "checkbox-event"
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// Checkbox represent a Checkbox view
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type Checkbox interface {
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ViewsContainer
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}
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type checkboxData struct {
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viewsContainerData
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}
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// NewCheckbox create new Checkbox object and return it
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func NewCheckbox(session Session, params Params) Checkbox {
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view := new(checkboxData)
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view.init(session)
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setInitParams(view, params)
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return view
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}
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func newCheckbox(session Session) View {
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return new(checkboxData)
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}
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func (button *checkboxData) init(session Session) {
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button.viewsContainerData.init(session)
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button.tag = "Checkbox"
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button.systemClass = "ruiGridLayout ruiCheckbox"
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button.set = button.setFunc
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button.remove = button.removeFunc
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button.changed = button.propertyChanged
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button.setRaw(ClickEvent, []func(View, MouseEvent){checkboxClickListener})
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button.setRaw(KeyDownEvent, []func(View, KeyEvent){checkboxKeyListener})
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}
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func (button *checkboxData) Focusable() bool {
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return true
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}
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func (button *checkboxData) propertyChanged(tag PropertyName) {
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switch tag {
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case Checked:
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session := button.Session()
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checked := IsCheckboxChecked(button)
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if listeners := GetCheckboxChangedListeners(button); len(listeners) > 0 {
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for _, listener := range listeners {
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listener(button, checked)
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}
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}
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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checkboxHtml(button, buffer, checked)
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session.updateInnerHTML(button.htmlID()+"checkbox", buffer.String())
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case CheckboxHorizontalAlign, CheckboxVerticalAlign:
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htmlID := button.htmlID()
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session := button.Session()
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updateCSSStyle(htmlID, session)
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updateInnerHTML(htmlID, session)
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case VerticalAlign:
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button.Session().updateCSSProperty(button.htmlID()+"content", "align-items", checkboxVerticalAlignCSS(button))
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case HorizontalAlign:
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button.Session().updateCSSProperty(button.htmlID()+"content", "justify-items", checkboxHorizontalAlignCSS(button))
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case AccentColor:
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updateInnerHTML(button.htmlID(), button.Session())
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default:
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button.viewsContainerData.propertyChanged(tag)
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}
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}
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func (button *checkboxData) setFunc(tag PropertyName, value any) []PropertyName {
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switch tag {
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case ClickEvent:
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if listeners, ok := valueToOneArgEventListeners[View, MouseEvent](value); ok && listeners != nil {
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listeners = append(listeners, checkboxClickListener)
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button.setRaw(tag, listeners)
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return []PropertyName{tag}
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}
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return nil
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case KeyDownEvent:
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if listeners, ok := valueToOneArgEventListeners[View, KeyEvent](value); ok && listeners != nil {
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listeners = append(listeners, checkboxKeyListener)
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button.setRaw(tag, listeners)
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return []PropertyName{tag}
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}
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return nil
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case CheckboxChangedEvent:
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return setOneArgEventListener[Checkbox, bool](button, tag, value)
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case Checked:
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return setBoolProperty(button, Checked, value)
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case CellVerticalAlign, CellHorizontalAlign, CellWidth, CellHeight:
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ErrorLogF(`"%s" property is not compatible with the BoundsProperty`, string(tag))
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return nil
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}
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return button.viewsContainerData.setFunc(tag, value)
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}
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func (button *checkboxData) removeFunc(tag PropertyName) []PropertyName {
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switch tag {
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case ClickEvent:
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button.setRaw(ClickEvent, []func(View, MouseEvent){checkboxClickListener})
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return []PropertyName{ClickEvent}
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case KeyDownEvent:
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button.setRaw(KeyDownEvent, []func(View, KeyEvent){checkboxKeyListener})
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return []PropertyName{ClickEvent}
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}
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return button.viewsContainerData.removeFunc(tag)
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}
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/*
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func (button *checkboxData) changedCheckboxState(state bool) {
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for _, listener := range GetCheckboxChangedListeners(button) {
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listener(button, state)
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}
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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button.htmlCheckbox(buffer, state)
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button.Session().updateInnerHTML(button.htmlID()+"checkbox", buffer.String())
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}
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*/
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func checkboxClickListener(view View, _ MouseEvent) {
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view.Set(Checked, !IsCheckboxChecked(view))
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BlurView(view)
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}
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func checkboxKeyListener(view View, event KeyEvent) {
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switch event.Code {
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case "Enter", "Space":
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view.Set(Checked, !IsCheckboxChecked(view))
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}
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}
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func (button *checkboxData) cssStyle(self View, builder cssBuilder) {
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session := button.Session()
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vAlign := GetCheckboxVerticalAlign(button)
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hAlign := GetCheckboxHorizontalAlign(button)
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switch hAlign {
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case CenterAlign:
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if vAlign == BottomAlign {
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builder.add("grid-template-rows", "1fr auto")
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} else {
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builder.add("grid-template-rows", "auto 1fr")
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}
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case RightAlign:
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builder.add("grid-template-columns", "1fr auto")
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default:
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builder.add("grid-template-columns", "auto 1fr")
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}
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if gap, ok := sizeConstant(session, "ruiCheckboxGap"); ok && gap.Type != Auto && gap.Value > 0 {
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builder.add("gap", gap.cssString("0", session))
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}
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builder.add("align-items", "stretch")
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builder.add("justify-items", "stretch")
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button.viewsContainerData.cssStyle(self, builder)
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}
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func checkboxHtml(button View, buffer *strings.Builder, checked bool) (int, int) {
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//func (button *checkboxData) htmlCheckbox(buffer *strings.Builder, checked bool) (int, int) {
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vAlign := GetCheckboxVerticalAlign(button)
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hAlign := GetCheckboxHorizontalAlign(button)
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buffer.WriteString(`<div id="`)
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buffer.WriteString(button.htmlID())
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buffer.WriteString(`checkbox" style="display: grid;`)
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if hAlign == CenterAlign {
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buffer.WriteString(" justify-items: center; grid-column-start: 1; grid-column-end: 2;")
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if vAlign == BottomAlign {
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buffer.WriteString(" grid-row-start: 2; grid-row-end: 3;")
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} else {
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buffer.WriteString(" grid-row-start: 1; grid-row-end: 2;")
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}
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} else {
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if hAlign == RightAlign {
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buffer.WriteString(" grid-column-start: 2; grid-column-end: 3;")
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} else {
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buffer.WriteString(" grid-column-start: 1; grid-column-end: 2;")
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}
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buffer.WriteString(" grid-row-start: 1; grid-row-end: 2;")
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switch vAlign {
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case BottomAlign:
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buffer.WriteString(" align-items: end;")
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case CenterAlign:
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buffer.WriteString(" align-items: center;")
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default:
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buffer.WriteString(" align-items: start;")
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}
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}
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buffer.WriteString(`">`)
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accentColor := Color(0)
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if color := GetAccentColor(button, ""); color != 0 {
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accentColor = color
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}
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if checked {
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buffer.WriteString(button.Session().checkboxOnImage(accentColor))
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} else {
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buffer.WriteString(button.Session().checkboxOffImage(accentColor))
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}
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buffer.WriteString(`</div>`)
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return vAlign, hAlign
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}
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func (button *checkboxData) htmlSubviews(self View, buffer *strings.Builder) {
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vCheckboxAlign, hCheckboxAlign := checkboxHtml(button, buffer, IsCheckboxChecked(button))
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buffer.WriteString(`<div id="`)
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buffer.WriteString(button.htmlID())
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buffer.WriteString(`content" style="display: grid;`)
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if hCheckboxAlign == LeftAlign {
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buffer.WriteString(" grid-column-start: 2; grid-column-end: 3;")
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} else {
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buffer.WriteString(" grid-column-start: 1; grid-column-end: 2;")
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}
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if hCheckboxAlign == CenterAlign && vCheckboxAlign != BottomAlign {
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buffer.WriteString(" grid-row-start: 2; grid-row-end: 3;")
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} else {
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buffer.WriteString(" grid-row-start: 1; grid-row-end: 2;")
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}
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buffer.WriteString(" align-items: ")
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buffer.WriteString(checkboxVerticalAlignCSS(button))
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buffer.WriteRune(';')
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buffer.WriteString(" justify-items: ")
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buffer.WriteString(checkboxHorizontalAlignCSS(button))
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buffer.WriteRune(';')
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buffer.WriteString(`">`)
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button.viewsContainerData.htmlSubviews(self, buffer)
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buffer.WriteString(`</div>`)
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}
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func checkboxHorizontalAlignCSS(view View) string {
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align := GetHorizontalAlign(view)
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values := enumProperties[CellHorizontalAlign].cssValues
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if align >= 0 && align < len(values) {
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return values[align]
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}
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return values[0]
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}
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func checkboxVerticalAlignCSS(view View) string {
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align := GetVerticalAlign(view)
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values := enumProperties[CellVerticalAlign].cssValues
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if align >= 0 && align < len(values) {
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return values[align]
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}
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return values[0]
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}
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// IsCheckboxChecked returns true if the Checkbox is checked, false otherwise.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func IsCheckboxChecked(view View, subviewID ...string) bool {
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return boolStyledProperty(view, subviewID, Checked, false)
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}
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// GetCheckboxVerticalAlign return the vertical align of a Checkbox subview: TopAlign (0), BottomAlign (1), CenterAlign (2)
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// If the second argument (subviewID) is not specified or it is "" then a left position of the first argument (view) is returned
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func GetCheckboxVerticalAlign(view View, subviewID ...string) int {
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return enumStyledProperty(view, subviewID, CheckboxVerticalAlign, LeftAlign, false)
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}
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// GetCheckboxHorizontalAlign return the vertical align of a Checkbox subview: LeftAlign (0), RightAlign (1), CenterAlign (2)
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// If the second argument (subviewID) is not specified or it is "" then a left position of the first argument (view) is returned
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func GetCheckboxHorizontalAlign(view View, subviewID ...string) int {
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return enumStyledProperty(view, subviewID, CheckboxHorizontalAlign, TopAlign, false)
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}
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// GetCheckboxChangedListeners returns the CheckboxChangedListener list of an Checkbox subview.
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// If there are no listeners then the empty list is returned
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetCheckboxChangedListeners(view View, subviewID ...string) []func(Checkbox, bool) {
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return getOneArgEventListeners[Checkbox, bool](view, subviewID, CheckboxChangedEvent)
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}
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