Added bar notifications.

Currently used in main menu music buttons.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/Utils.java

@@ -116,6 +116,15 @@ public class Utils {
 	/** Volume display elapsed time. */
 	private static int volumeDisplay = -1;
 
+	/** The current bar notification string. */
+	private static String barNotif;
+
+	/** The current bar notification timer. */
+	private static int barNotifTimer = -1;
+
+	/** Duration, in milliseconds, to display bar notifications. */
+	private static final int BAR_NOTIFICATION_TIME = 1250;
+
 	/** Set of all Unicode strings already loaded. */
 	private static HashSet<String> loadedGlyphs = new HashSet<String>();
 
@@ -694,6 +703,56 @@ public class Utils {
 		FONT_SMALL.drawString(x + textMarginX, y, text, Color.white);
 	}
 
+	/**
+	 * Submits a bar notification for drawing.
+	 * Must be called with {@link #drawBarNotification(Graphics)}.
+	 * @param s the notification string
+	 */
+	public static void sendBarNotification(String s) {
+		if (s != null) {
+			barNotif = s;
+			barNotifTimer = 0;
+		}
+	}
+
+	/**
+	 * Updates the bar notification by a delta interval.
+	 * @param delta the delta interval since the last call
+	 */
+	public static void updateBarNotification(int delta) {
+		if (barNotifTimer > -1 && barNotifTimer < BAR_NOTIFICATION_TIME) {
+			barNotifTimer += delta;
+			if (barNotifTimer > BAR_NOTIFICATION_TIME)
+				barNotifTimer = BAR_NOTIFICATION_TIME;
+		}
+	}
+
+	/**
+	 * Draws the notification sent from {@link #sendBarNotification(String)}.
+	 * @param g the graphics context
+	 */
+	public static void drawBarNotification(Graphics g) {
+		if (barNotifTimer == -1 || barNotifTimer >= BAR_NOTIFICATION_TIME)
+			return;
+
+		float alpha = 1f;
+		if (barNotifTimer >= BAR_NOTIFICATION_TIME * 0.9f)
+			alpha -= 1 - ((BAR_NOTIFICATION_TIME - barNotifTimer) / (BAR_NOTIFICATION_TIME * 0.1f));
+		int midX = container.getWidth() / 2, midY = container.getHeight() / 2;
+		float barHeight = FONT_LARGE.getLineHeight() * (1f + 0.6f * Math.min(barNotifTimer * 15f / BAR_NOTIFICATION_TIME, 1f));
+		float oldAlphaB = Utils.COLOR_BLACK_ALPHA.a, oldAlphaW = Utils.COLOR_WHITE_ALPHA.a;
+		Utils.COLOR_BLACK_ALPHA.a *= alpha;
+		Utils.COLOR_WHITE_ALPHA.a = alpha;
+		g.setColor(Utils.COLOR_BLACK_ALPHA);
+		g.fillRect(0, midY - barHeight / 2f, container.getWidth(), barHeight);
+		FONT_LARGE.drawString(
+				midX - FONT_LARGE.getWidth(barNotif) / 2f,
+				midY - FONT_LARGE.getLineHeight() / 2.2f,
+				barNotif, Utils.COLOR_WHITE_ALPHA);
+		Utils.COLOR_BLACK_ALPHA.a = oldAlphaB;
+		Utils.COLOR_WHITE_ALPHA.a = oldAlphaW;
+	}
+
 	/**
 	 * Takes a screenshot.
 	 * @author http://wiki.lwjgl.org/index.php?title=Taking_Screen_Shots

src/itdelatrisu/opsu/states/MainMenu.java

@@ -256,6 +256,7 @@ public class MainMenu extends BasicGameState {
 				new SimpleDateFormat("h:mm a").format(new Date())),
 				marginX, height - marginY - lineHeight);
 
+		Utils.drawBarNotification(g);
 		Utils.drawVolume(g);
 		Utils.drawFPS();
 		Utils.drawCursor();
@@ -276,6 +277,7 @@ public class MainMenu extends BasicGameState {
 			throws SlickException {
 		Utils.updateCursor(delta);
 		Utils.updateVolumeDisplay(delta);
+		Utils.updateBarNotification(delta);
 		int mouseX = input.getMouseX(), mouseY = input.getMouseY();
 		logo.hoverUpdate(delta, mouseX, mouseY, 0.25f);
 		playButton.hoverUpdate(delta, mouseX, mouseY, 0.25f);
@@ -388,10 +390,13 @@ public class MainMenu extends BasicGameState {
 
 		// music button actions
 		if (musicPlay.contains(x, y)) {
-			if (MusicController.isPlaying())
+			if (MusicController.isPlaying()) {
 				MusicController.pause();
-			else if (!MusicController.isTrackLoading())
+				Utils.sendBarNotification("Pause");
+			} else if (!MusicController.isTrackLoading()) {
 				MusicController.resume();
+				Utils.sendBarNotification("Play");
+			}
 		} else if (musicNext.contains(x, y)) {
 			boolean isTheme = MusicController.isThemePlaying();
 			SongMenu menu = (SongMenu) game.getState(Opsu.STATE_SONGMENU);
@@ -404,6 +409,7 @@ public class MainMenu extends BasicGameState {
 			}
 			if (Options.isDynamicBackgroundEnabled() && !sameAudio && !MusicController.isThemePlaying())
 				bgAlpha = 0f;
+			Utils.sendBarNotification(">> Next");
 		} else if (musicPrevious.contains(x, y)) {
 			if (!previous.isEmpty()) {
 				SongMenu menu = (SongMenu) game.getState(Opsu.STATE_SONGMENU);
@@ -412,6 +418,7 @@ public class MainMenu extends BasicGameState {
 					bgAlpha = 0f;
 			} else
 				MusicController.setPosition(0);
+			Utils.sendBarNotification("<< Previous");
 		}
 
 		// downloads button actions