82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package buttons
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import (
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"image/color"
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"git.vezzani.net/ben/games/common/elements/v1/blocks"
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"git.vezzani.net/ben/games/common/elements/v1/mouse"
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"git.vezzani.net/ben/games/common/ux/v1"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/text"
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"golang.org/x/image/font"
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)
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func New(ops ...OptFunc) *Button {
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b := Button{
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Block: blocks.Block{},
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font: ux.FontFace,
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color: ux.FontColor,
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}
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for op := range ops {
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ops[op](&b)
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}
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return &b
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}
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type Button struct {
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blocks.Block
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label string
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font font.Face
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color color.Color
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onClick func(ms mouse.State)
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onMouseDown func(ms mouse.State)
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onMouseUp func(ms mouse.State)
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}
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func (b *Button) Draw(screen *ebiten.Image) {
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b.Block.Draw(screen)
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b.drawLabel(screen)
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}
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func (b *Button) drawLabel(screen *ebiten.Image) {
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if b.label != "" {
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strBounds, _ := font.BoundString(b.font, b.label)
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textWidth := strBounds.Max.X - strBounds.Min.X
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textHeight := strBounds.Max.Y - strBounds.Min.Y
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bnd := b.Bounds()
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tx := bnd.Min.X + (bnd.Width / 2) - (textWidth / 2).Round()
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ty := bnd.Min.Y + (bnd.Height / 2) - (textHeight / 2).Round()
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text.Draw(screen, b.label, b.font, tx, ty, b.color)
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}
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}
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func (b *Button) HandleMouseEvent(ms mouse.State) bool {
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bnd := b.Bounds()
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if !bnd.Contains(ms.Point()) {
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return false
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}
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switch {
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case b.onClick != nil && (ms.RightClicked || ms.LeftClicked):
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b.onClick(ms)
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return true
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case b.onMouseUp != nil && (ms.RightChanged && !ms.RightDown || ms.LeftChanged && !ms.LeftDown):
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b.onMouseUp(ms)
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return true
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case b.onMouseDown != nil && (ms.RightChanged && ms.RightDown || ms.LeftChanged && ms.LeftDown):
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b.onMouseDown(ms)
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return true
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}
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return false
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}
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