move engine to engines/easy_ebitengine

konstructor/engines/easy_ebitengine/screen.menu.go

@@ -0,0 +1,35 @@
+package easy_ebitengine
+
+import (
+	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/text"
+)
+
+func (e *Engine) MenuUpdate() {
+	menu := e.Domain.GetMenu(e.KContext.ScreenValue)
+
+	if e.UpPressed() && menu.CurrentSelected != 0 {
+		menu.CurrentSelected--
+	}
+
+	if e.DownPressed() && menu.CurrentSelected != len(menu.MenuItems)-1 {
+		menu.CurrentSelected++
+	}
+
+	if e.Action0Pressed() {
+		menu.MenuItems[menu.CurrentSelected].Handler()
+	}
+
+	e.Domain.SetMenu(e.KContext.ScreenValue, menu)
+}
+
+func (e *Engine) MenuDraw(screen *ebiten.Image) {
+	menu := e.Domain.GetMenu(e.KContext.ScreenValue)
+	face := menu.Layout.MenuItemFont.GetFontFace()
+
+	for i, menu_item := range menu.MenuItems {
+		color := menu.GetMenuItemColor(i)
+		offset := int(menu.Layout.MenuItemFont.Size) * (i + 1)
+		text.Draw(screen, menu_item.Label+"\n", face, 8, offset, color)
+	}
+}