Add ability to disable SequentialLayout wrapping.

include/ui/SequentialLayout.hpp

@@ -17,13 +17,18 @@ struct SequentialLayout : widget::Widget {
 		LEFT_ALIGNMENT,
 		CENTER_ALIGNMENT,
 		RIGHT_ALIGNMENT,
+
+		TOP_ALIGNMENT = LEFT_ALIGNMENT,
+		MIDDLE_ALIGNMENT = CENTER_ALIGNMENT,
+		BOTTOM_ALIGNMENT = RIGHT_ALIGNMENT,
 	};
 
 	Orientation orientation = HORIZONTAL_ORIENTATION;
 	Alignment alignment = LEFT_ALIGNMENT;
+	bool wrap = true;
 	/** Space between box bounds. */
 	math::Vec margin;
-	/** Space between adjacent elements. */
+	/** Space between adjacent elements, and adjacent lines if wrapped. */
 	math::Vec spacing;
 
 	void step() override;

src/ui/SequentialLayout.cpp

@@ -62,7 +62,7 @@ void SequentialLayout::step() {
 		}
 
 		// Should we wrap the widget now?
-		if (!row.empty() && rowWidth + X(child->box.size) > boundWidth) {
+		if (wrap && !row.empty() && rowWidth + X(child->box.size) > boundWidth) {
 			flushRow();
 			rowWidth = 0.0;
 		}