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gt_label.go
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gt_label.go
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package gt_label
import (
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/widget"
"github.com/google/uuid"
"image/color"
)
type GTLabel struct {
widget.BaseWidget
Id string
Text string
TextColor color.Color
Size fyne.Size
}
// NewGTLabel 请使用这种方式初始化,直接用结构体初始化不会产生 Id 等扩展字段
func NewGTLabel(text string, size fyne.Size, textColor color.Color) *GTLabel {
alabel := >Label{
Text: text,
TextColor: textColor,
}
alabel.Id = uuid.New().String()
alabel.Resize(size)
alabel.ExtendBaseWidget(alabel)
return alabel
}
func (l *GTLabel) CreateRenderer() fyne.WidgetRenderer {
text := canvas.NewText(l.Text, l.TextColor)
text.Alignment = fyne.TextAlignCenter
return >LabelRenderer{label: l, text: text, objects: []fyne.CanvasObject{text}}
}
type gtLabelRenderer struct {
label *GTLabel
text *canvas.Text
objects []fyne.CanvasObject
}
func (r *gtLabelRenderer) Layout(size fyne.Size) {
r.text.Resize(size)
}
func (r *gtLabelRenderer) MinSize() fyne.Size {
return r.label.Size // 返回自定义大小
}
func (r *gtLabelRenderer) Refresh() {
r.text.Text = r.label.Text
r.text.Color = r.label.TextColor
r.text.Refresh()
}
func (r *gtLabelRenderer) Objects() []fyne.CanvasObject {
return r.objects
}
func (r *gtLabelRenderer) Destroy() {}