Implement the main menu for the ordoor binary

In this commit, we also remove code that doesn't properly belong in
view-menu

internal/ui/interface.go

@@ -20,6 +20,7 @@ import (
 // mind. The interface transparently scales them all to the current screen size
 // to compensate.
 type Interface struct {
+	Name    string
 	menu    *assetstore.Menu
 	static  []*assetstore.Sprite // Static elements in the interface
 	ticks   int
@@ -28,6 +29,8 @@ type Interface struct {
 
 func NewInterface(menu *assetstore.Menu) (*Interface, error) {
 	iface := &Interface{
+		Name: menu.Name,
+
 		menu: menu,
 	}
 
@@ -59,6 +62,10 @@ func (i *Interface) Update(screenX, screenY int) error {
 
 	// Iterate through all widgets, update mouse state
 	for _, widget := range i.widgets {
+		if widget.disabled {
+			continue // No activity for disabled widgets
+		}
+
 		mouseIsOver := mousePos.In(widget.Bounds)
 		widget.hovering(mouseIsOver)
 		widget.mouseButton(mouseIsOver && ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft))
@@ -188,11 +195,17 @@ func (i *Interface) widgetFromRecord(record *menus.Record) (*Widget, error) {
 		}
 		widget.hoverAnimation = hovers
 
-		sprite, err := i.menu.Sprite(record.Share + 1)
+		pressed, err := i.menu.Sprite(record.Share + 1)
 		if err != nil {
 			return nil, err
 		}
-		widget.mouseButtonDownImage = sprite.Image
+		widget.mouseButtonDownImage = pressed.Image
+
+		disabled, err := i.menu.Sprite(record.Share + 2)
+		if err != nil {
+			return nil, err
+		}
+		widget.disabledImage = disabled.Image
 	}
 
 	return widget, nil

internal/ui/widget.go

@@ -25,6 +25,9 @@ type Widget struct {
 	OnMouseClick func()
 	OnMouseUp    func()
 
+	disabled      bool
+	disabledImage *ebiten.Image
+
 	// These are expected to have the same dimensions as the Bounds
 	hoverAnimation []*ebiten.Image
 	hoverState     bool
@@ -39,6 +42,13 @@ type Widget struct {
 	sprite *assetstore.Sprite
 }
 
+func (w *Widget) Disable() {
+	w.hovering(false)
+	w.mouseButton(false)
+
+	w.disabled = true
+}
+
 func (w *Widget) hovering(value bool) {
 	if w.OnHoverEnter != nil && !w.hoverState && value {
 		w.OnHoverEnter()
@@ -72,6 +82,10 @@ func (w *Widget) mouseButton(value bool) {
 }
 
 func (w *Widget) Image(aniStep int) (*ebiten.Image, error) {
+	if w.disabled {
+		return w.disabledImage, nil
+	}
+
 	if w.hoverState && w.mouseButtonState {
 		return w.mouseButtonDownImage, nil
 	}