Rename hudbar to hotbar; Use DOM references for hotbar

[dragonblocks.git] / engine / hotbar.js

diff --git a/engine/hotbar.js b/engine/hotbar.js
new file mode 100644 (file)
index 0000000..755e03a
--- /dev/null
+++ b/engine/hotbar.js
@@ -0,0 +1,125 @@
+/*
+ * hotbar.js
+ *
+ * Copyright 2020 Elias Fleckenstein <eliasfleckenstein@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ *
+ */
+
+dragonblocks.Hotbar = class
+{
+       constructor(inventory, slots)
+       {
+               this.inventory = inventory;
+               this.slots = slots;
+
+               this.selectedSlot = 0;
+
+               this.display = document.body.insertBefore(document.createElement("div"), dragonblocks.mapDisplay.element.nextSibling);
+               this.display.style.position = "fixed";
+               this.display.style.bottom = "5px";
+               this.display.style.height = "60px";
+               this.display.style.width = "445px";
+
+               dblib.center(this.display);
+
+               this.slotDisplays = [];
+
+               for (let i = 0; i < this.slots; i++) {
+                       let slotDisplay = this.display.appendChild(document.createElement("div"));
+                       slotDisplay.style.position = "absolute";
+                       slotDisplay.style.top = "3px";
+                       slotDisplay.style.left = i * 53 + "px";
+                       slotDisplay.style.width = "50px";
+                       slotDisplay.style.height = "50px";
+                       slotDisplay.style.boxShadow = "0 0 0 3px #C5C5C5";
+
+                       let slotCountDisplay = slotDisplay.appendChild(document.createElement("span"));
+                       slotCountDisplay.style.position = "absolute";
+                       slotCountDisplay.style.right = "5px";
+                       slotCountDisplay.style.bottom = "5px";
+                       slotCountDisplay.style.color = "white";
+
+                       this.slotDisplays[i] = {slotDisplay, slotCountDisplay};
+               }
+
+               this.selectorDisplay = this.display.appendChild(document.createElement("div"));
+               this.selectorDisplay.style.position = "absolute";
+               this.selectorDisplay.style.top = "3px";
+               this.selectorDisplay.style.width = "50px";
+               this.selectorDisplay.style.height = "50px";
+               this.selectorDisplay.style.boxShadow = "0 0 0 5px #999999";
+
+               this.itemnameDisplay = this.display.appendChild(document.createElement("span"));
+               this.itemnameDisplay.style.position = "absolute";
+               this.itemnameDisplay.style.bottom = "60px";
+               this.itemnameDisplay.style.color = "white";
+               this.itemnameDisplay.style.fontSize = "20px";
+
+               this.update();
+       }
+
+       nextItem()
+       {
+               if (++this.selectedSlot == this.slots)
+                       this.selectedSlot = 0;
+
+               this.update();
+       }
+
+       previousItem()
+       {
+               if (--this.selectedSlot == -1)
+                       this.selectedSlot = this.slots - 1;
+
+               this.update();
+       }
+
+       select(i)
+       {
+               this.selectedSlot = i;
+               this.update();
+       }
+
+       update()
+       {
+               for (let i = 0; i < this.slots; i++) {
+                       let itemstack = this.inventory.getSlot(i);
+                       let {slotDisplay, slotCountDisplay} = this.slotDisplays[i];
+
+                       slotDisplay.style.background = itemstack.item && dragonblocks.getTexture(itemstack.toItem().texture);
+                       if (! slotDisplay.style.backgroundColor || slotDisplay.style.backgroundColor == "initial")
+                               slotDisplay.style.backgroundColor = "rgba(0, 0, 0, 0.3)";
+                       slotDisplay.style.backgroundSize = "cover";
+
+                       slotCountDisplay.innerHTML = (itemstack.count <= 1) ? "" : itemstack.count;
+
+                       if (i == this.selectedSlot) {
+                               this.selectorDisplay.style.left = slotDisplay.style.left;
+
+                               this.itemnameDisplay.innerHTML = itemstack.item ? itemstack.toItem().desc : "";
+                               dblib.center(this.itemnameDisplay);
+                       }
+               }
+       }
+
+       getSelectedItem()
+       {
+               return this.inventory.getSlot(this.selectedSlot);
+       }
+};