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package ui
import (
"fmt"
"image/color"
"math"
"github.com/hajimehoshi/ebiten/v2"
"muhq.space/muhqs-game/go/assets"
"muhq.space/muhqs-game/go/game"
"muhq.space/muhqs-game/go/log"
)
type CardGrid struct {
WidgetBase
cards game.PileOfCards
columns, rows int
scale float64
cardWidth, cardHeight float64
xOffset, yOffset int
highlights map[*game.Card]color.Color
grid *ebiten.Image
gridCards int
}
func NewCardGrid(x, y, width, height int, scale float64, cards game.PileOfCards) *CardGrid {
w := &CardGrid{
WidgetBase: NewWidgetBase(x, y, width, height),
cards: cards,
scale: scale,
highlights: make(map[*game.Card]color.Color),
}
w.renderImpl = func() *ebiten.Image { return w.render() }
return w
}
func (w *CardGrid) Columns(columns int) *CardGrid {
if w.rows != 0 {
log.Panicf("CardGrid can not have fixed columns and rows")
}
w.columns = columns
return w
}
func (w *CardGrid) Rows(rows int) *CardGrid {
if w.columns != 0 {
log.Panicf("CardGrid can not have fixed columns and rows")
}
w.rows = rows
return w
}
func (w *CardGrid) render() *ebiten.Image {
img := ebiten.NewImage(w.Width, w.Height)
cards := w.cards.Cards()
nCards := len(cards)
if nCards == 0 {
return img
}
if nCards != w.gridCards {
if w.cardWidth == 0 && w.cardHeight == 0 {
cardImg := assets.GetCard(w.cards.Cards()[0].Path(), "en")
b := cardImg.Bounds()
// Fit the row height to the widgets height
if w.rows == 1 && w.scale == -1 {
w.scale = float64(w.Height) / float64(b.Dy())
}
w.cardWidth = float64(b.Dx()) * w.scale
w.cardHeight = float64(b.Dy()) * w.scale
}
var width, height int
if w.rows != 0 {
width = int(math.Ceil(float64(nCards)/float64(w.rows)) * w.cardWidth)
height = int(float64(w.rows) * w.cardHeight)
} else if w.columns != 0 {
width = int(float64(w.columns) * w.cardWidth)
height = int(math.Ceil(float64(nCards)/float64(w.columns)) * w.cardHeight)
} else {
log.Panicf("CardGrid must have have fixed columns or rows")
}
w.gridCards = nCards
w.grid = ebiten.NewImage(width, height)
log.Debug(fmt.Sprintf("create grid %d, %d\n", width, height))
// TODO: support big card grids
xOffset, yOffset := 0.0, 0.0
for i, card := range cards {
cardImg := assets.GetCard(card.Path(), "en")
if cardImg == nil {
log.Panicf("No image found for %s", card.Path())
}
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(w.scale, w.scale)
op.GeoM.Translate(xOffset, yOffset)
if c, found := w.highlights[card]; found {
op.ColorScale.ScaleWithColor(c)
}
w.grid.DrawImage(cardImg, op)
columns := w.columns
if columns == 0 {
columns = nCards / w.rows
}
if i != 0 && i%columns == columns-1 {
xOffset = 0.0
yOffset += w.cardHeight
} else {
xOffset += w.cardWidth
}
}
}
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(w.xOffset), float64(w.yOffset))
img.DrawImage(w.grid, op)
return img
}
func (w *CardGrid) FindObjectAt(_x, _y int) any {
if !w.Contains(_x, _y) || w.grid == nil {
return nil
}
x, y := _x-w.X-w.xOffset, _y-w.Y-w.yOffset
gridBounds := w.grid.Bounds()
if x > gridBounds.Dx() || y > gridBounds.Dy() {
return nil
}
column := int(float64(x) / w.cardWidth)
row := int(float64(y) / w.cardHeight)
var i int
if w.rows != 0 {
i = row*w.cards.Size()/w.rows + column
} else {
i = row*w.columns + column
}
if i >= w.cards.Size() {
return nil
}
return w.cards.Cards()[i]
}
func (w *CardGrid) forceRedrawGrid() {
// Reset the grid card count to force grid to be redrawn containing highlight changes
w.gridCards = 0
w.ForceRedraw()
}
func (w *CardGrid) setHighlights(cards []*game.Card, col color.Color) {
highlights := make(map[*game.Card]color.Color)
for _, c := range cards {
highlights[c] = col
}
w.highlights = highlights
w.forceRedrawGrid()
}
func (w *CardGrid) HighlightCard(card *game.Card, color color.Color) {
w.setHighlights([]*game.Card{card}, color)
}
func (w *CardGrid) AddHighlightCard(card *game.Card, color color.Color) {
log.Debug("Add card highlight", "card", card.Name, "pointer", fmt.Sprintf("%p@", card), "color", color)
w.highlights[card] = color
w.forceRedrawGrid()
}
func (w *CardGrid) ClearHighlights() {
w.setHighlights([]*game.Card{}, nil)
}
func (*CardGrid) IsScrollable() bool { return true }
func (w *CardGrid) Scroll(x, y int) {
w.xOffset += x * 10
if w.xOffset > 0 {
w.xOffset = 0
}
w.yOffset += y * 10
if w.yOffset > 0 {
w.yOffset = 0
}
gridBounds := w.grid.Bounds()
if w.xOffset < -gridBounds.Dx()+w.Width {
w.xOffset = -gridBounds.Dx() + w.Width
}
if w.yOffset < -gridBounds.Dy()+w.Height {
w.yOffset = -gridBounds.Dy() + w.Height
}
w.ForceRedraw()
}
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