Toast manager center alignment support (#374)

* Make ToastManager.updateToastsPositions and member variables protected (#374) * Add support for 'center' alignments in ToastManager (#374) * Update TestToasts to include top/bottom center alignment options (#374) * Change log updated with ToastManager changes related to (#374)
kotcrab · Dec 10, 2022 · 4bf70db · 4bf70db
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Showing 3 changed files with 23 additions and 14 deletions.
diff --git a/ui/CHANGES.md b/ui/CHANGES.md
@@ -1,6 +1,7 @@
 #### Version: 1.5.1-SNAPSHOT (libGDX 1.11.0)
-
 - Updated to libGDX 1.11.0
+- **Changed**: [#374](https://github.com/kotcrab/vis-ui/issues/374) - `ToastManager` now supports 'center' horizontal alignment for 'top' and 'bottom' alignments.
+  - Also `ToastManager.updateToastsPositions` and `ToastManager` member variables are now protected, allowing further customization of the toast positions.
 
 #### Version: 1.5.0 (libGDX 1.10.0)
 - Updated to libGDX 1.10.0

diff --git a/ui/src/main/java/com/kotcrab/vis/ui/util/ToastManager.java b/ui/src/main/java/com/kotcrab/vis/ui/util/ToastManager.java
@@ -48,15 +48,15 @@
 public class ToastManager {
 	public static final int UNTIL_CLOSED = -1;
 
-	private final Group root;
+	protected final Group root;
 
-	private int screenPaddingX = 20;
-	private int screenPaddingY = 20;
-	private int messagePadding = 5;
-	private int alignment = Align.topRight;
+	protected int screenPaddingX = 20;
+	protected int screenPaddingY = 20;
+	protected int messagePadding = 5;
+	protected int alignment = Align.topRight;
 
-	private Array<Toast> toasts = new Array<Toast>();
-	private ObjectMap<Toast, Timer.Task> timersTasks = new ObjectMap<Toast, Timer.Task>();
+	protected Array<Toast> toasts = new Array<Toast>();
+	protected ObjectMap<Toast, Timer.Task> timersTasks = new ObjectMap<Toast, Timer.Task>();
 
 	/** Toast manager will create own group to host toasts and put it into the stage root. */
 	public ToastManager (Stage stage) {
@@ -186,16 +186,18 @@ public void toFront () {
 		root.toFront();
 	}
 
-	private void updateToastsPositions () {
+	protected void updateToastsPositions () {
 		boolean bottom = (alignment & Align.bottom) != 0;
 		boolean left = (alignment & Align.left) != 0;
+		boolean center = (alignment & Align.center) != 0;
 		float y = bottom ? screenPaddingY : root.getHeight() - screenPaddingY;
 
 		for (Toast toast : toasts) {
 			Table table = toast.getMainTable();
-			table.setPosition(
-					left ? screenPaddingX : root.getWidth() - table.getWidth() - screenPaddingX,
-					bottom ? y : y - table.getHeight());
+			float x = left ? screenPaddingX
+					: center ? (root.getWidth() - table.getWidth() - screenPaddingX) / 2f
+					: /*right*/ root.getWidth() - table.getWidth() - screenPaddingX;
+			table.setPosition(x, bottom ? y : y - table.getHeight());
 
 			y += (table.getHeight() + messagePadding) * (bottom ? 1 : -1);
 		}

diff --git a/ui/src/test/java/com/kotcrab/vis/ui/test/manual/TestToasts.java b/ui/src/test/java/com/kotcrab/vis/ui/test/manual/TestToasts.java
@@ -49,7 +49,7 @@ public void resize () {
 		});
 
 		final VisSelectBox<String> alignment = new VisSelectBox<String>();
-		alignment.setItems("top left", "top right", "bottom left", "bottom right");
+		alignment.setItems("top left", "top right", "top center", "bottom left", "bottom right", "bottom center");
 		alignment.setSelectedIndex(1);
 		alignment.addListener(new ChangeListener() {
 			@Override
@@ -63,11 +63,17 @@ public void changed (ChangeEvent event, Actor actor) {
 						toastManager.setAlignment(Align.topRight);
 						break;
 					case 2:
-						toastManager.setAlignment(Align.bottomLeft);
+						toastManager.setAlignment(Align.top | Align.center);
 						break;
 					case 3:
+						toastManager.setAlignment(Align.bottomLeft);
+						break;
+					case 4:
 						toastManager.setAlignment(Align.bottomRight);
 						break;
+					case 5:
+						toastManager.setAlignment(Align.bottom | Align.center);
+						break;
 				}
 			}
 		});