etk/button.go

221 lines
5.6 KiB
Go
Raw Normal View History

2022-06-08 23:35:42 +00:00
package etk
import (
"image"
2024-01-23 08:53:47 +00:00
"image/color"
2022-06-08 23:35:42 +00:00
2024-01-16 21:00:20 +00:00
"code.rocket9labs.com/tslocum/etk/messeji"
2022-06-08 23:35:42 +00:00
"github.com/hajimehoshi/ebiten/v2"
"golang.org/x/image/font"
"golang.org/x/image/font/sfnt"
2022-06-08 23:35:42 +00:00
)
2023-10-29 06:04:32 +00:00
// Button is a clickable button.
2022-06-08 23:35:42 +00:00
type Button struct {
*Box
2024-01-23 20:39:08 +00:00
field *messeji.TextField
textFont *sfnt.Font
textSize int
textAutoSize int
2024-01-23 20:39:08 +00:00
borderSize int
2024-01-23 08:53:47 +00:00
borderTop color.RGBA
borderRight color.RGBA
borderBottom color.RGBA
borderLeft color.RGBA
onSelected func() error
2024-01-29 04:44:19 +00:00
pressed bool
2022-06-08 23:35:42 +00:00
}
2023-10-29 06:04:32 +00:00
// NewButton returns a new Button widget.
2022-07-07 21:53:14 +00:00
func NewButton(label string, onSelected func() error) *Button {
2022-06-08 23:35:42 +00:00
textColor := Style.ButtonTextColor
if textColor.A == 0 {
2022-07-07 21:53:14 +00:00
textColor = Style.TextColorDark
2022-06-08 23:35:42 +00:00
}
2024-01-23 20:39:08 +00:00
f := newText()
f.SetText(label)
f.SetForegroundColor(textColor)
f.SetHorizontal(messeji.AlignCenter)
f.SetVertical(messeji.AlignCenter)
f.SetScrollBarVisible(false)
2022-06-08 23:35:42 +00:00
2024-01-29 04:44:19 +00:00
b := &Button{
2024-01-23 08:53:47 +00:00
Box: NewBox(),
2024-01-23 20:39:08 +00:00
field: f,
textFont: Style.TextFont,
textSize: Scale(Style.TextSize),
2024-01-23 08:53:47 +00:00
onSelected: onSelected,
2024-01-23 20:39:08 +00:00
borderSize: Scale(Style.BorderSize),
2024-01-23 08:53:47 +00:00
borderTop: Style.BorderColorTop,
borderRight: Style.BorderColorRight,
borderBottom: Style.BorderColorBottom,
borderLeft: Style.BorderColorLeft,
2022-06-08 23:35:42 +00:00
}
2024-01-29 04:44:19 +00:00
b.SetBackground(Style.ButtonBgColor)
b.resizeFont()
2024-01-29 04:44:19 +00:00
return b
2022-06-08 23:35:42 +00:00
}
2023-10-29 06:04:32 +00:00
// SetRect sets the position and size of the Button.
2022-06-08 23:35:42 +00:00
func (b *Button) SetRect(r image.Rectangle) {
b.Box.rect = r
2024-01-23 20:39:08 +00:00
b.field.SetRect(r)
b.resizeFont()
2023-11-08 22:11:36 +00:00
for _, w := range b.children {
w.SetRect(r)
}
2022-06-08 23:35:42 +00:00
}
2024-01-24 07:56:05 +00:00
// SetBorderSize sets the size of the border around the button.
func (b *Button) SetBorderSize(size int) {
b.Lock()
defer b.Unlock()
b.borderSize = size
}
// SetBorderColors sets the color of the top, right, bottom and left border.
func (b *Button) SetBorderColors(top color.RGBA, right color.RGBA, bottom color.RGBA, left color.RGBA) {
2024-01-23 08:53:47 +00:00
b.Lock()
defer b.Unlock()
b.borderTop = top
b.borderRight = right
b.borderBottom = bottom
b.borderLeft = left
}
2024-01-23 20:39:08 +00:00
// Text returns the content of the text buffer.
func (b *Button) Text() string {
b.Lock()
defer b.Unlock()
return b.field.Text()
}
// SetText sets the text in the field.
func (b *Button) SetText(text string) {
b.Lock()
defer b.Unlock()
b.field.SetText(text)
b.resizeFont()
2024-01-23 20:39:08 +00:00
}
// SetFont sets the font and text size of button label. Scaling is not applied.
func (b *Button) SetFont(fnt *sfnt.Font, size int) {
2024-01-23 20:39:08 +00:00
b.Lock()
defer b.Unlock()
b.textFont, b.textSize = fnt, size
b.resizeFont()
}
func (b *Button) resizeFont() {
w, h := b.rect.Dx()-b.field.Padding()*2, b.rect.Dy()-b.field.Padding()*2
if w == 0 || h == 0 {
if b.textAutoSize == b.textSize {
return
}
b.textAutoSize = b.textSize
ff := FontFace(b.textFont, b.textSize)
b.field.SetFont(ff, fontMutex)
return
}
var autoSize int
var ff font.Face
for autoSize = b.textSize; autoSize > 0; autoSize-- {
ff = FontFace(b.textFont, autoSize)
bounds := BoundString(ff, b.field.Text())
if bounds.Dx() <= w && bounds.Dy() <= h {
break
}
}
if b.textAutoSize == autoSize {
return
}
b.field.SetFont(ff, fontMutex)
b.textAutoSize = autoSize
2024-01-23 20:39:08 +00:00
}
// SetHorizontal sets the horizontal alignment of the button label.
func (b *Button) SetHorizontal(h Alignment) {
b.Lock()
defer b.Unlock()
b.field.SetHorizontal(messeji.Alignment(h))
}
// SetVertical sets the vertical alignment of the button label.
2024-09-19 02:41:36 +00:00
func (b *Button) SetVertical(v Alignment) {
b.Lock()
defer b.Unlock()
2024-09-19 02:41:36 +00:00
b.field.SetVertical(messeji.Alignment(v))
}
2024-09-12 05:05:01 +00:00
// Cursor returns the cursor shape shown when a mouse cursor hovers over the
// widget, or -1 to let widgets beneath determine the cursor shape.
func (b *Button) Cursor() ebiten.CursorShapeType {
return ebiten.CursorShapePointer
}
2023-10-29 06:04:32 +00:00
// HandleKeyboard is called when a keyboard event occurs.
func (b *Button) HandleKeyboard(ebiten.Key, rune) (handled bool, err error) {
return false, nil
}
// HandleMouse is called when a mouse event occurs.
2022-07-07 21:53:14 +00:00
func (b *Button) HandleMouse(cursor image.Point, pressed bool, clicked bool) (handled bool, err error) {
if !clicked {
2024-01-29 04:44:19 +00:00
if b.pressed && !pressed {
2024-02-10 20:38:13 +00:00
b.Lock()
2024-01-29 04:44:19 +00:00
b.pressed = false
2024-02-10 20:38:13 +00:00
b.background = Style.ButtonBgColor
b.Unlock()
2024-01-29 04:44:19 +00:00
}
2022-07-07 21:53:14 +00:00
return true, nil
}
b.Lock()
2024-01-29 04:44:19 +00:00
b.pressed = true
b.background = color.RGBA{uint8(float64(Style.ButtonBgColor.R) * 0.95), uint8(float64(Style.ButtonBgColor.G) * 0.95), uint8(float64(Style.ButtonBgColor.B) * 0.95), 255}
2022-07-07 21:53:14 +00:00
onSelected := b.onSelected
if onSelected == nil {
b.Unlock()
return true, nil
}
b.Unlock()
return true, onSelected()
2022-06-08 23:35:42 +00:00
}
2023-10-29 06:04:32 +00:00
// Draw draws the button on the screen.
2022-06-08 23:35:42 +00:00
func (b *Button) Draw(screen *ebiten.Image) error {
2024-01-23 08:53:47 +00:00
r := b.rect
2022-06-08 23:35:42 +00:00
// Draw label.
2024-01-23 20:39:08 +00:00
b.field.Draw(screen)
2022-06-08 23:35:42 +00:00
// Draw border.
2024-01-24 07:56:05 +00:00
if b.borderSize != 0 {
2024-01-29 04:44:19 +00:00
if !b.pressed {
screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Min.X+b.borderSize, r.Max.Y)).(*ebiten.Image).Fill(b.borderLeft)
screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Max.X, r.Min.Y+b.borderSize)).(*ebiten.Image).Fill(b.borderTop)
screen.SubImage(image.Rect(r.Max.X-b.borderSize, r.Min.Y, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderRight)
screen.SubImage(image.Rect(r.Min.X, r.Max.Y-b.borderSize, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderBottom)
} else {
screen.SubImage(image.Rect(r.Max.X-b.borderSize, r.Min.Y, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderLeft)
screen.SubImage(image.Rect(r.Min.X, r.Max.Y-b.borderSize, r.Max.X, r.Max.Y)).(*ebiten.Image).Fill(b.borderTop)
screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Min.X+b.borderSize, r.Max.Y)).(*ebiten.Image).Fill(b.borderRight)
screen.SubImage(image.Rect(r.Min.X, r.Min.Y, r.Max.X, r.Min.Y+b.borderSize)).(*ebiten.Image).Fill(b.borderBottom)
}
2024-01-24 07:56:05 +00:00
}
2022-06-08 23:35:42 +00:00
return nil
}