145 lines
3.3 KiB
Go
145 lines
3.3 KiB
Go
package etk
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import (
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"image"
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"image/color"
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"sync"
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"code.rocket9labs.com/tslocum/etk/messeji"
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"github.com/hajimehoshi/ebiten/v2"
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"golang.org/x/image/font"
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)
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// Button is a clickable button.
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type Button struct {
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*Box
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field *messeji.TextField
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borderSize int
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borderTop color.RGBA
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borderRight color.RGBA
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borderBottom color.RGBA
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borderLeft color.RGBA
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onSelected func() error
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}
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// NewButton returns a new Button widget.
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func NewButton(label string, onSelected func() error) *Button {
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textColor := Style.ButtonTextColor
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if textColor.A == 0 {
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textColor = Style.TextColorDark
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}
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f := newText()
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f.SetText(label)
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f.SetForegroundColor(textColor)
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f.SetHorizontal(messeji.AlignCenter)
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f.SetVertical(messeji.AlignCenter)
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f.SetScrollBarVisible(false)
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return &Button{
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Box: NewBox(),
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field: f,
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onSelected: onSelected,
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borderSize: Scale(Style.BorderSize),
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borderTop: Style.BorderColorTop,
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borderRight: Style.BorderColorRight,
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borderBottom: Style.BorderColorBottom,
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borderLeft: Style.BorderColorLeft,
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}
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}
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// SetRect sets the position and size of the Button.
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func (b *Button) SetRect(r image.Rectangle) {
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b.Box.rect = r
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b.field.SetRect(r)
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for _, w := range b.children {
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w.SetRect(r)
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}
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}
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// SetBorderSize sets the size of the border around the button.
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func (b *Button) SetBorderSize(size int) {
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b.Lock()
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defer b.Unlock()
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b.borderSize = size
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}
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// SetBorderColors sets the color of the top, right, bottom and left border.
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func (b *Button) SetBorderColors(top color.RGBA, right color.RGBA, bottom color.RGBA, left color.RGBA) {
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b.Lock()
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defer b.Unlock()
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b.borderTop = top
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b.borderRight = right
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b.borderBottom = bottom
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b.borderLeft = left
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}
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// Text returns the content of the text buffer.
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func (b *Button) Text() string {
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b.Lock()
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defer b.Unlock()
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return b.field.Text()
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}
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// SetText sets the text in the field.
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func (b *Button) SetText(text string) {
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b.Lock()
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defer b.Unlock()
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b.field.SetText(text)
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}
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// SetFont sets the font face of the text within the field.
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func (b *Button) SetFont(face font.Face, mutex *sync.Mutex) {
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b.Lock()
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defer b.Unlock()
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b.field.SetFont(face, mutex)
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}
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// HandleKeyboard is called when a keyboard event occurs.
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func (b *Button) HandleKeyboard(ebiten.Key, rune) (handled bool, err error) {
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return false, nil
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}
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// HandleMouse is called when a mouse event occurs.
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func (b *Button) HandleMouse(cursor image.Point, pressed bool, clicked bool) (handled bool, err error) {
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if !clicked {
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return true, nil
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}
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b.Lock()
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onSelected := b.onSelected
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if onSelected == nil {
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b.Unlock()
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return true, nil
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}
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b.Unlock()
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return true, onSelected()
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}
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// Draw draws the button on the screen.
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func (b *Button) Draw(screen *ebiten.Image) error {
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r := b.rect
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// Draw background.
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screen.SubImage(r).(*ebiten.Image).Fill(Style.ButtonBgColor)
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// Draw label.
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b.field.Draw(screen)
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// Draw border.
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if b.borderSize != 0 {
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screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Min.X+b.borderSize, r.Max.Y)).(*ebiten.Image).Fill(b.borderLeft)
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screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Max.X, r.Min.Y+b.borderSize)).(*ebiten.Image).Fill(b.borderTop)
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screen.SubImage(image.Rect(r.Max.X-b.borderSize, r.Min.Y, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderRight)
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screen.SubImage(image.Rect(r.Min.X, r.Max.Y-b.borderSize, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderBottom)
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}
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return nil
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}
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