Move inventorySelect to its own file

internal/ui/inventory_select.go

@@ -0,0 +1,64 @@
+package ui
+
+import (
+	"code.ur.gs/lupine/ordoor/internal/menus"
+)
+
+func init() {
+	registerBuilder(menus.TypeInventorySelect, ownedByMenu)
+}
+
+// An inventory select is a sort of radio button. If 2 share the same menu,
+// selecting one deselects the other. Otherwise, they act like checkboxes.
+//
+// TODO: wrap all the behaviour in a single struct to make it easier to drive
+type inventorySelect struct {
+	checkbox
+
+	parentPath string
+	others     []*inventorySelect
+}
+
+// Called from the menu, which fills "others" for us
+func registerInventorySelect(d *Driver, r *menus.Record) (*inventorySelect, error) {
+	sprites, err := d.menu.Sprites(r.Share, 3) // unchecked, checked, disabled
+	if err != nil {
+		return nil, err
+	}
+
+	element := &inventorySelect{
+		checkbox: checkbox{
+			button: button{
+				path:      r.Path(),
+				baseSpr:   sprites[0], // unchecked
+				clickSpr:  sprites[1], // checked
+				frozenSpr: sprites[2], // disabled
+				hoverImpl: hoverImpl{text: r.Text},
+			},
+
+			valueImpl: valueImpl{str: "0"},
+		},
+	}
+
+	d.clickables = append(d.clickables, element)
+	d.freezables = append(d.freezables, element)
+	d.hoverables = append(d.hoverables, element)
+	d.paintables = append(d.paintables, element)
+	d.valueables = append(d.valueables, element)
+
+	return element, nil
+}
+
+func (i *inventorySelect) registerMouseClick() {
+	// Do nothing if we're already selected
+	if i.value() == "1" {
+		return
+	}
+
+	// Turn us on, turn everyone else off
+	for _, other := range i.others {
+		other.setValue("0")
+	}
+
+	i.setValue("1")
+}