rendering items, pick up, iventory re-make in progress to aloow item drop/wear/whatever

engine/screens/inventory.go

@@ -1,11 +1,99 @@
 package screens
 
-type InventoryScreen struct {
+import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+	"strings"
+)
 
+type InventoryScreen struct {
+	*MenuScreen
+	items []ecs.Entity
+	
+	cursor int
+	offset int
+	pageSize int
 }
 
-func (ts *InventoryScreen) UseEcs() bool {return true}
-func (ts *InventoryScreen) Enter() {}
-func (ts *InventoryScreen) HandleInput(input string) {}
-func (ts *InventoryScreen) Exit() {}
-func (ts *InventoryScreen) Render() {}
+func (is *InventoryScreen) MakeInverntory() *InventoryScreen {
+	is.drawFunc = is.InventoryRender
+	is.inputFunc = is.HandleInput
+	return is
+}
+
+func (is *InventoryScreen) SetItems(items []ecs.Entity) *InventoryScreen {
+	is.items = items
+	return is
+}
+
+func (is *InventoryScreen) HandleInput(input string) {
+	switch input {
+	case "PageUp":
+		is.offset = is.offset - 1
+		if is.offset < 0 {
+			is.offset = 0
+		}
+		break
+	case "PageDown":
+		is.offset = is.offset + 1
+		if is.offset > len(is.items)-1 {
+			is.offset = len(is.items) - 1
+		}
+		break
+	case "enter":
+		//select current under cursor
+		break;
+	case "a","b","c","d","e","f","g","h","i","j","k","l":
+		//selct by letter
+		break;
+	case "Escape":
+		fallthrough
+	case "Space":
+		is.scm.SetScreen(is.scm.PreviousScreen)
+		break
+	}
+}
+
+
+
+func (is *InventoryScreen) InventoryRender() {
+	menuLayer := is.mw.GetLayer("menu")
+	menuLayer.ClearRect(is.Rect)
+	bgLayer := is.mw.GetLayer("menubg")
+	bgLayer.ClearRect(is.Rect)
+	bgLayer.WithColor(is.bgColor).NewWindow(is.Rect).Splash()
+	menuLayer.WithColor(is.fgColor).NewWindow(is.Rect).DoubleBordered(is.title)
+	menuLayer.Print(is.X+(is.W/2)-7, is.Y+is.H-1, "╡"+"[color=green]Space[/color] to close"+"╞")
+	footerHeight := 0
+	if is.footer != "" {
+		_, footerHeight = menuLayer.PrintInside(is.Rect, is.footer, 9)
+		footerHeight = footerHeight + 2
+	}
+	_, headerHeight := menuLayer.PrintInside(is.Rect, is.header, blt.TK_ALIGN_LEFT)
+	itemField := types.Rect{is.X, is.Y + headerHeight + 1, is.W, is.H - headerHeight - footerHeight}
+	_ = itemField
+	var ilw, ilh int
+	if (len(is.items) > 0) {
+		//fixme itemfield object, scroller, inputhandler, current selected item
+		menuItems := make([]string, 0)
+		for i := is.offset; i < len(is.items); i++ {
+			if string(is.items[i].(string)) != "" {
+				menuItems = append(menuItems, is.items[i].(string))
+			}
+		}
+		ilw, ilh = menuLayer.PrintInside(itemField, strings.Join(menuItems, "\n"), blt.TK_ALIGN_LEFT)
+	}
+	if ilh < len(is.items) {
+		is.drawScrollBar(menuLayer, itemField)
+	}
+	if ilw > itemField.W-4 {
+		fmt.Printf("Excess width of item names found! Need h-scroll of certain names")
+	}
+}
+
+
+//func (ms *InventoryScreen) UseEcs() bool {return true}
+//func (ms *InventoryScreen) Enter()       {}
+
+//func (ms *InventoryScreen) Exit()   {}
+//func (ms *InventoryScreen) Render() {}