cursor update

engine/screens/inventory.go

@@ -31,11 +31,12 @@ type displayItem struct {
 type preparedList []displayItem
 
 func (p *preparedList) Prepare(is *InventoryScreen) {
+
 	//fixme add item class sorting
-	//fixme text instead of list to rpint and use printinside()
+
 	bp := items.Controller.GetComponent(is.who, ecs.BackpackComponent).(items.Backpack)
 	is.prepared = make([]displayItem, len(bp.GetItems()))
-	//todo prepare item list
+	//prepare item list
 	for i, ent := range bp.GetItems() {
 		namec := items.Controller.GetComponent(ent, ecs.Named{}.Type()).(ecs.Named)
 		is.prepared[i] = displayItem{
@@ -75,6 +76,36 @@ func (is *InventoryScreen) HandleInput(input string) {
 		return
 	}
 	switch input {
+	case "Up":
+		is.cursor = is.cursor - 1
+		if is.cursor < 0 {
+			is.cursor = 0
+		}
+		if is.cursor < is.offset {
+			is.offset = is.offset - 1
+			if is.offset < 0 {
+				is.offset = 0
+			}
+		}
+		break
+	case "Down":
+		is.cursor = is.cursor + 1
+		if is.cursor >= len(is.prepared) {
+			is.cursor = len(is.prepared) - 1
+		}
+		if is.cursor > is.offset {
+			is.offset = is.offset + 1
+			if is.offset*is.pageSize > len(is.prepared) {
+				is.offset = len(is.prepared) / is.pageSize
+			}
+		}
+		break
+	case "Left":
+		is.prepared[is.cursor].Selected = false
+		break
+	case "Right":
+		is.prepared[is.cursor].Selected = true
+		break
 	case "PageUp":
 		is.offset = is.offset - 1
 		if is.offset < 0 {
@@ -114,12 +145,13 @@ func (is *InventoryScreen) InventoryRender() {
 	_, 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
+	is.pageSize = itemField.H - 2
 
 	if (len(is.prepared) > 0) {
 
 		for i := is.offset; i < itemField.H; i++ {
 			if i < len(is.prepared) {
-				selectedColor := "blue"
+				selectedColor := "white"
 				selectedDash := "-"
 				if is.prepared[i].Selected {
 					selectedColor = "green"