initial commit

pncdsl/dialog.box.go

@@ -0,0 +1,97 @@
+package pncdsl
+
+import (
+	"image/color"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/vector"
+)
+
+// dialogBox is the active-conversation UI: it shows the current node's
+// lines (one at a time, advanced on click) followed by the visible choices.
+type dialogBox struct {
+	dialogue   *Dialogue
+	node       *DialogueNode
+	lineIdx    int   // -1 = lines done, showing choices
+	choiceHits []Rectangle
+}
+
+func newDialogBox(d *Dialogue, n *DialogueNode) *dialogBox {
+	return &dialogBox{dialogue: d, node: n, lineIdx: 0}
+}
+
+// resolveChoices returns the list of choices currently visible to the player.
+func (db *dialogBox) resolveChoices(ctx *Ctx) []DialogueChoice {
+	out := make([]DialogueChoice, 0, len(db.node.Choices))
+	for _, c := range db.node.Choices {
+		if c.Show != nil && !c.Show.Eval(ctx) {
+			continue
+		}
+		if c.Once && ctx.Game.State.Talked(db.node.Name+":"+c.Text) > 0 {
+			continue
+		}
+		out = append(out, c)
+	}
+	return out
+}
+
+// handleClick advances the dialog state. Returns the picked choice (if any).
+func (db *dialogBox) handleClick(ctx *Ctx, p Point) (picked *DialogueChoice) {
+	if db.lineIdx >= 0 && db.lineIdx < len(db.node.Lines) {
+		db.lineIdx++
+		if db.lineIdx >= len(db.node.Lines) {
+			db.lineIdx = -1
+			db.choiceHits = nil
+		}
+		return nil
+	}
+	for i, r := range db.choiceHits {
+		if r.Contains(p) {
+			ch := db.resolveChoices(ctx)[i]
+			return &ch
+		}
+	}
+	return nil
+}
+
+func (db *dialogBox) currentLine() (DialogueLine, bool) {
+	if db.lineIdx >= 0 && db.lineIdx < len(db.node.Lines) {
+		return db.node.Lines[db.lineIdx], true
+	}
+	return DialogueLine{}, false
+}
+
+func (db *dialogBox) draw(dst *ebiten.Image, g *Game) {
+	// box across the bottom 60 px
+	vector.DrawFilledRect(dst, 0, 140, 320, 60, color.RGBA{15, 15, 25, 240}, false)
+	vector.StrokeRect(dst, 0, 140, 320, 60, 1, color.RGBA{80, 80, 110, 255}, false)
+
+	if ln, ok := db.currentLine(); ok {
+		speakerCol := color.RGBA{220, 220, 120, 255}
+		drawText(dst, ln.Speaker+":", 6, 142, speakerCol)
+		lines := wrapText(ln.Text, 300)
+		for i, l := range lines {
+			drawText(dst, l, 6, 158+i*14, color.White)
+		}
+		return
+	}
+
+	// choices
+	ctx := g.makeCtx()
+	choices := db.resolveChoices(ctx)
+	db.choiceHits = db.choiceHits[:0]
+	for i, c := range choices {
+		y := 144 + i*14
+		r := Rect(6, float64(y), 308, 13)
+		db.choiceHits = append(db.choiceHits, r)
+		mx, my := g.input.Pos()
+		hover := r.Contains(Point{X: float64(mx), Y: float64(my)})
+		bg := color.RGBA{30, 30, 45, 255}
+		if hover {
+			bg = color.RGBA{70, 70, 100, 255}
+		}
+		vector.DrawFilledRect(dst, float32(r.X), float32(r.Y), float32(r.W), float32(r.H), bg, false)
+		drawText(dst, c.Text, int(r.X)+2, int(r.Y)-1, color.White)
+		_ = i
+	}
+}