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rui/numberPicker.go

397 lines
10 KiB
Go

package rui
import (
"fmt"
"math"
"strconv"
"strings"
)
const (
NumberChangedEvent = "number-changed"
NumberPickerType = "number-picker-type"
NumberPickerMin = "number-picker-min"
NumberPickerMax = "number-picker-max"
NumberPickerStep = "number-picker-step"
NumberPickerValue = "number-picker-value"
)
const (
// NumberEditor - type of NumberPicker. NumberPicker is presented by editor
NumberEditor = 0
// NumberSlider - type of NumberPicker. NumberPicker is presented by slider
NumberSlider = 1
)
// NumberPicker - NumberPicker view
type NumberPicker interface {
View
}
type numberPickerData struct {
viewData
numberChangedListeners []func(NumberPicker, float64)
}
// NewNumberPicker create new NumberPicker object and return it
func NewNumberPicker(session Session, params Params) NumberPicker {
view := new(numberPickerData)
view.Init(session)
setInitParams(view, params)
return view
}
func newNumberPicker(session Session) View {
return NewNumberPicker(session, nil)
}
func (picker *numberPickerData) Init(session Session) {
picker.viewData.Init(session)
picker.tag = "NumberPicker"
picker.numberChangedListeners = []func(NumberPicker, float64){}
}
func (picker *numberPickerData) Focusable() bool {
return true
}
func (picker *numberPickerData) normalizeTag(tag string) string {
tag = strings.ToLower(tag)
switch tag {
case Type, Min, Max, Step, Value:
return "number-picker-" + tag
}
return tag
}
func (picker *numberPickerData) Remove(tag string) {
picker.remove(picker.normalizeTag(tag))
}
func (picker *numberPickerData) remove(tag string) {
switch tag {
case NumberChangedEvent:
if len(picker.numberChangedListeners) > 0 {
picker.numberChangedListeners = []func(NumberPicker, float64){}
picker.propertyChangedEvent(tag)
}
default:
picker.viewData.remove(tag)
picker.propertyChanged(tag)
}
}
func (picker *numberPickerData) Set(tag string, value interface{}) bool {
return picker.set(picker.normalizeTag(tag), value)
}
func (picker *numberPickerData) set(tag string, value interface{}) bool {
if value == nil {
picker.remove(tag)
return true
}
switch tag {
case NumberChangedEvent:
switch value := value.(type) {
case func(NumberPicker, float64):
picker.numberChangedListeners = []func(NumberPicker, float64){value}
case func(float64):
fn := func(view NumberPicker, newValue float64) {
value(newValue)
}
picker.numberChangedListeners = []func(NumberPicker, float64){fn}
case []func(NumberPicker, float64):
picker.numberChangedListeners = value
case []func(float64):
listeners := make([]func(NumberPicker, float64), len(value))
for i, val := range value {
if val == nil {
notCompatibleType(tag, val)
return false
}
listeners[i] = func(view NumberPicker, newValue float64) {
val(newValue)
}
}
picker.numberChangedListeners = listeners
case []interface{}:
listeners := make([]func(NumberPicker, float64), len(value))
for i, val := range value {
if val == nil {
notCompatibleType(tag, val)
return false
}
switch val := val.(type) {
case func(NumberPicker, float64):
listeners[i] = val
default:
notCompatibleType(tag, val)
return false
}
}
picker.numberChangedListeners = listeners
}
picker.propertyChangedEvent(tag)
return true
case NumberPickerValue:
oldValue := GetNumberPickerValue(picker, "")
min, max := GetNumberPickerMinMax(picker, "")
if picker.setFloatProperty(NumberPickerValue, value, min, max) {
if newValue := GetNumberPickerValue(picker, ""); oldValue != newValue {
if picker.created {
picker.session.runScript(fmt.Sprintf(`setInputValue('%s', '%f')`, picker.htmlID(), newValue))
}
for _, listener := range picker.numberChangedListeners {
listener(picker, newValue)
}
picker.propertyChangedEvent(tag)
}
return true
}
default:
if picker.viewData.set(tag, value) {
picker.propertyChanged(tag)
return true
}
}
return false
}
func (picker *numberPickerData) propertyChanged(tag string) {
if picker.created {
switch tag {
case NumberPickerType:
if GetNumberPickerType(picker, "") == NumberSlider {
updateProperty(picker.htmlID(), "type", "range", picker.session)
} else {
updateProperty(picker.htmlID(), "type", "number", picker.session)
}
case NumberPickerMin:
min, _ := GetNumberPickerMinMax(picker, "")
updateProperty(picker.htmlID(), Min, strconv.FormatFloat(min, 'f', -1, 32), picker.session)
case NumberPickerMax:
_, max := GetNumberPickerMinMax(picker, "")
updateProperty(picker.htmlID(), Max, strconv.FormatFloat(max, 'f', -1, 32), picker.session)
case NumberPickerStep:
if step := GetNumberPickerStep(picker, ""); step > 0 {
updateProperty(picker.htmlID(), Step, strconv.FormatFloat(step, 'f', -1, 32), picker.session)
} else {
updateProperty(picker.htmlID(), Step, "any", picker.session)
}
case NumberPickerValue:
value := GetNumberPickerValue(picker, "")
picker.session.runScript(fmt.Sprintf(`setInputValue('%s', '%f')`, picker.htmlID(), value))
for _, listener := range picker.numberChangedListeners {
listener(picker, value)
}
}
}
}
func (picker *numberPickerData) Get(tag string) interface{} {
return picker.get(picker.normalizeTag(tag))
}
func (picker *numberPickerData) get(tag string) interface{} {
switch tag {
case NumberChangedEvent:
return picker.numberChangedListeners
default:
return picker.viewData.get(tag)
}
}
func (picker *numberPickerData) htmlTag() string {
return "input"
}
func (picker *numberPickerData) htmlProperties(self View, buffer *strings.Builder) {
picker.viewData.htmlProperties(self, buffer)
if GetNumberPickerType(picker, "") == NumberSlider {
buffer.WriteString(` type="range"`)
} else {
buffer.WriteString(` type="number"`)
}
min, max := GetNumberPickerMinMax(picker, "")
if min != math.Inf(-1) {
buffer.WriteString(` min="`)
buffer.WriteString(strconv.FormatFloat(min, 'f', -1, 64))
buffer.WriteByte('"')
}
if max != math.Inf(1) {
buffer.WriteString(` max="`)
buffer.WriteString(strconv.FormatFloat(max, 'f', -1, 64))
buffer.WriteByte('"')
}
step := GetNumberPickerStep(picker, "")
if step != 0 {
buffer.WriteString(` step="`)
buffer.WriteString(strconv.FormatFloat(step, 'f', -1, 64))
buffer.WriteByte('"')
} else {
buffer.WriteString(` step="any"`)
}
buffer.WriteString(` value="`)
buffer.WriteString(strconv.FormatFloat(GetNumberPickerValue(picker, ""), 'f', -1, 64))
buffer.WriteByte('"')
buffer.WriteString(` oninput="editViewInputEvent(this)"`)
}
func (picker *numberPickerData) htmlDisabledProperties(self View, buffer *strings.Builder) {
if IsDisabled(self, "") {
buffer.WriteString(` disabled`)
}
picker.viewData.htmlDisabledProperties(self, buffer)
}
func (picker *numberPickerData) handleCommand(self View, command string, data DataObject) bool {
switch command {
case "textChanged":
if text, ok := data.PropertyValue("text"); ok {
if value, err := strconv.ParseFloat(text, 32); err == nil {
oldValue := GetNumberPickerValue(picker, "")
picker.properties[NumberPickerValue] = value
if value != oldValue {
for _, listener := range picker.numberChangedListeners {
listener(picker, value)
}
}
}
}
return true
}
return picker.viewData.handleCommand(self, command, data)
}
// GetNumberPickerType returns the type of NumberPicker subview. Valid values:
// NumberEditor (0) - NumberPicker is presented by editor (default type);
// NumberSlider (1) - NumberPicker is presented by slider.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetNumberPickerType(view View, subviewID string) int {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view == nil {
return 0
}
t, _ := enumStyledProperty(view, NumberPickerType, NumberEditor)
return t
}
// GetNumberPickerMinMax returns the min and max value of NumberPicker subview.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetNumberPickerMinMax(view View, subviewID string) (float64, float64) {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view != nil {
t, _ := enumStyledProperty(view, NumberPickerType, NumberEditor)
var defMin, defMax float64
if t == NumberSlider {
defMin = 0
defMax = 1
} else {
defMin = math.Inf(-1)
defMax = math.Inf(1)
}
min, ok := floatStyledProperty(view, NumberPickerMin, defMin)
if !ok {
min, _ = floatStyledProperty(view, Min, defMin)
}
max, ok := floatStyledProperty(view, NumberPickerMax, defMax)
if !ok {
max, _ = floatStyledProperty(view, Max, defMax)
}
if min > max {
return max, min
}
return min, max
}
return 0, 1
}
// GetNumberPickerStep returns the value changing step of NumberPicker subview.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetNumberPickerStep(view View, subviewID string) float64 {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view == nil {
return 0
}
result, ok := floatStyledProperty(view, NumberPickerStep, 0)
if !ok {
result, _ = floatStyledProperty(view, Step, 0)
}
_, max := GetNumberPickerMinMax(view, "")
if result > max {
return max
}
return result
}
// GetNumberPickerValue returns the value of NumberPicker subview.
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetNumberPickerValue(view View, subviewID string) float64 {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view == nil {
return 0
}
min, _ := GetNumberPickerMinMax(view, "")
result, ok := floatStyledProperty(view, NumberPickerValue, min)
if !ok {
result, _ = floatStyledProperty(view, Value, min)
}
return result
}
// GetNumberChangedListeners returns the NumberChangedListener list of an NumberPicker subview.
// If there are no listeners then the empty list is returned
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetNumberChangedListeners(view View, subviewID string) []func(NumberPicker, float64) {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view != nil {
if value := view.Get(NumberChangedEvent); value != nil {
if listeners, ok := value.([]func(NumberPicker, float64)); ok {
return listeners
}
}
}
return []func(NumberPicker, float64){}
}