List UI control

src/yugecin/opsudance/ui/ItemList.java

@@ -0,0 +1,128 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2016 yugecin
+ *
+ * opsu!dance 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu! 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 opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package yugecin.opsudance.ui;
+
+import itdelatrisu.opsu.ui.Fonts;
+import itdelatrisu.opsu.ui.UI;
+import org.newdawn.slick.Color;
+import org.newdawn.slick.GameContainer;
+import org.newdawn.slick.Graphics;
+import org.newdawn.slick.Input;
+import org.newdawn.slick.state.StateBasedGame;
+
+import java.util.Observer;
+
+public class ItemList {
+
+	private int x;
+	private int y;
+	private int width;
+	private int height;
+
+	private int start;
+
+	private Object[] items;
+	private Observer observer;
+
+	private boolean visible;
+
+	public void init(GameContainer container) {
+		x = container.getWidth() / 6;
+		y = 0;
+		width = x * 4;
+		height = container.getHeight();
+	}
+
+	public void setItems(Object[] items) {
+		this.items = items;
+	}
+
+	public void setClickListener(Observer o) {
+		observer = o;
+	}
+
+	public boolean isVisible() {
+		return visible;
+	}
+
+	public void show() {
+		visible = true;
+	}
+
+	public void render(GameContainer container, StateBasedGame game, Graphics g) {
+		g.setColor(Color.black);
+		g.fillRect(x, y, width, height);
+		int y = this.y + 5;
+		for (int i = start, m = items.length; i < m; i++) {
+			if (container.getInput().getMouseX() >= x && container.getInput().getMouseX() < x + width) {
+				if (container.getInput().getMouseY() >= y && container.getInput().getMouseY() < y + Fonts.MEDIUM.getLineHeight() + 5) {
+					g.setColor(new Color(0x11A9FF));
+					g.fillRect(x, y, width, Fonts.MEDIUM.getLineHeight() + 5);
+				}
+			}
+			Fonts.MEDIUM.drawString(x + 5, y + 2, items[i].toString(), Color.white);
+			y += Fonts.MEDIUM.getLineHeight() + 5;
+			if (y >= height - Fonts.MEDIUM.getLineHeight()) {
+				break;
+			}
+		}
+	}
+
+	public void mousePressed(int button, int x, int y) {
+		if (UI.getBackButton().contains(x, y)) {
+			visible = false;
+		}
+		if (x < this.x || x > this.x + width) {
+			visible = false;
+			return;
+		}
+		if (button != 0) {
+			return;
+		}
+		if (y < 5) {
+			return;
+		}
+		y -= 5;
+		int index = y / (Fonts.MEDIUM.getLineHeight() + 5);
+		index -= start;
+		if (index >= 0 && index < items.length) {
+			observer.update(null, index);
+			visible = false;
+		}
+	}
+
+	public void mouseDragged(int oldx, int oldy, int x, int y) {
+
+	}
+
+	public void mouseWheelMoved(int delta) {
+		if (delta > 0) {
+			start = Math.max(0, start - 1);
+		} else {
+			start = Math.min(items.length - 1, start + 1);
+		}
+	}
+
+	public void keyPressed(int key, char c) {
+		if (key == Input.KEY_ESCAPE) {
+			visible = false;
+		}
+	}
+
+}