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// Copyright 2018 The Walk Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package walk
import (
"strings"
)
type NumberLabel struct {
static
decimals int
decimalsChangedPublisher EventPublisher
suffix string
suffixChangedPublisher EventPublisher
value float64
valueChangedPublisher EventPublisher
}
func NewNumberLabel(parent Container) (*NumberLabel, error) {
nl := new(NumberLabel)
if err := nl.init(nl, parent); err != nil {
return nil, err
}
nl.SetTextAlignment(AlignFar)
if _, err := nl.updateText(); err != nil {
return nil, err
}
nl.MustRegisterProperty("Decimals", NewProperty(
func() interface{} {
return nl.Decimals()
},
func(v interface{}) error {
return nl.SetDecimals(assertIntOr(v, 0))
},
nl.decimalsChangedPublisher.Event()))
nl.MustRegisterProperty("Suffix", NewProperty(
func() interface{} {
return nl.Suffix()
},
func(v interface{}) error {
return nl.SetSuffix(assertStringOr(v, ""))
},
nl.suffixChangedPublisher.Event()))
nl.MustRegisterProperty("Value", NewProperty(
func() interface{} {
return nl.Value()
},
func(v interface{}) error {
return nl.SetValue(assertFloat64Or(v, 0.0))
},
nl.valueChangedPublisher.Event()))
return nl, nil
}
func (nl *NumberLabel) asStatic() *static {
return &nl.static
}
func (nl *NumberLabel) TextAlignment() Alignment1D {
return nl.textAlignment1D()
}
func (nl *NumberLabel) SetTextAlignment(alignment Alignment1D) error {
if alignment == AlignDefault {
alignment = AlignFar
}
return nl.setTextAlignment1D(alignment)
}
func (nl *NumberLabel) Decimals() int {
return nl.decimals
}
func (nl *NumberLabel) SetDecimals(decimals int) error {
if decimals == nl.decimals {
return nil
}
old := nl.decimals
nl.decimals = decimals
if _, err := nl.updateText(); err != nil {
nl.decimals = old
return err
}
nl.decimalsChangedPublisher.Publish()
return nil
}
func (nl *NumberLabel) Suffix() string {
return nl.suffix
}
func (nl *NumberLabel) SetSuffix(suffix string) error {
if suffix == nl.suffix {
return nil
}
old := nl.suffix
nl.suffix = suffix
if _, err := nl.updateText(); err != nil {
nl.suffix = old
return err
}
nl.suffixChangedPublisher.Publish()
return nil
}
func (nl *NumberLabel) Value() float64 {
return nl.value
}
func (nl *NumberLabel) SetValue(value float64) error {
if value == nl.value {
return nil
}
old := nl.value
nl.value = value
if _, err := nl.updateText(); err != nil {
nl.value = old
return err
}
nl.valueChangedPublisher.Publish()
return nil
}
func (nl *NumberLabel) updateText() (changed bool, err error) {
var sb strings.Builder
sb.WriteString(FormatFloatGrouped(nl.value, nl.decimals))
if nl.suffix != "" {
sb.WriteString(nl.suffix)
}
return nl.setText(sb.String())
}
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