diff -r c52d88ea020b -r 6cf690e042bd ui/winui/container.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/winui/container.cpp	Mon May 29 12:48:42 2023 +0200
@@ -0,0 +1,72 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2023 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "container.h"
+
+
+UiBoxContainer::UiBoxContainer(Grid grid, enum UiBoxContainerType type) {
+	this->grid = grid;
+	this->type = type;
+
+	// hbox needs one row def, vbox needs one col def
+	// all other col/row defs are created when elements are added
+	if (type == UI_CONTAINER_HBOX) {
+		RowDefinition rowdef = RowDefinition();
+		grid.RowDefinitions().Append(rowdef);
+	} else {
+		ColumnDefinition coldef = ColumnDefinition();
+		grid.ColumnDefinitions().Append(coldef);
+	}
+}
+
+void UiBoxContainer::Add(Control control, UiBool fill) {
+	GridLength gl;
+	if (fill) {
+		gl.Value = 1;
+		gl.GridUnitType = GridUnitType::Star;
+	}
+	else {
+		gl.Value = 0;
+		gl.GridUnitType = GridUnitType::Auto;
+	}
+	
+	if (type == UI_CONTAINER_HBOX) {
+		ColumnDefinition coldef = ColumnDefinition();
+		coldef.Width(gl);
+		grid.ColumnDefinitions().Append(coldef);
+		grid.SetColumn(control, grid.Children().Size());
+	} else {
+		RowDefinition rowdef = RowDefinition();
+		rowdef.Height(gl);
+		grid.RowDefinitions().Append(rowdef);
+		grid.SetRow(control, grid.Children().Size());
+	}
+
+	grid.Children().Append(control);
+}
+