2022-06-08 23:35:42 +00:00
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package etk
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import (
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"image"
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"image/color"
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2024-01-16 21:00:20 +00:00
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"code.rocket9labs.com/tslocum/etk/messeji"
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2022-06-08 23:35:42 +00:00
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"github.com/hajimehoshi/ebiten/v2"
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)
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2023-10-29 06:04:32 +00:00
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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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Label *messeji.TextField
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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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2023-11-08 01:37:51 +00:00
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l := messeji.NewTextField(Style.TextFont, Style.TextFontMutex)
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l.SetText(label)
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l.SetForegroundColor(textColor)
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l.SetBackgroundColor(transparent)
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l.SetHorizontal(messeji.AlignCenter)
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l.SetVertical(messeji.AlignCenter)
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l.SetScrollBarVisible(false)
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return &Button{
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Box: NewBox(),
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Label: l,
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onSelected: onSelected,
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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.Label.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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// SetBorderColor sets the color of the top, right, bottom and left border.
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func (b *Button) SetBorderColor(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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// 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.Label.Draw(screen)
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// Draw border.
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const borderSize = 4
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screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Min.X+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+borderSize)).(*ebiten.Image).Fill(b.borderTop)
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screen.SubImage(image.Rect(r.Max.X-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-borderSize, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderBottom)
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return nil
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}
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