remove demo game

ui.cursor.go

@@ -0,0 +1,37 @@
+package pncdsl
+
+import (
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/vector"
+)
+
+// Cursor renders the mouse cursor. When the player has an inventory item
+// selected, the item's sprite is drawn at the cursor instead of the
+// default crosshair. Registered last so it draws on top.
+type Cursor struct {
+	Name string
+}
+
+func (c *Cursor) GetName() string { return c.Name }
+func (c *Cursor) Tick(ctx *UICtx) {}
+
+func (c *Cursor) Draw(dst *ebiten.Image, ctx *UICtx) {
+	g := ctx.Game
+	x, y := g.Input.Pos()
+	if sel := g.Inventory.Selected(); sel != "" {
+		if it, ok := g.ItemManager.Get(sel); ok {
+			img := g.loaded.image(g.AssetManager, it.Sprite)
+			sw, sh := img.Bounds().Dx(), img.Bounds().Dy()
+			if sw > 0 && sh > 0 && !g.loaded.isPlaceholder(it.Sprite) {
+				op := &ebiten.DrawImageOptions{}
+				op.GeoM.Scale(16/float64(sw), 16/float64(sh))
+				op.GeoM.Translate(float64(x-8), float64(y-8))
+				dst.DrawImage(img, op)
+				return
+			}
+		}
+	}
+	col := g.Theme().CursorColor
+	vector.StrokeLine(dst, float32(x-3), float32(y), float32(x+4), float32(y), 1, col, false)
+	vector.StrokeLine(dst, float32(x), float32(y-3), float32(x), float32(y+4), 1, col, false)
+}