add resize examples as per STR3433

add example code for creating images for resize.dox
based on Article #415: How does resizing work?
https://www.fltk.org/articles.php?L415

see also https://www.fltk.org/str.php?L3433

1 files changed, 50 insertions, 0 deletions

diff --git a/test/resize-arrows.h b/test/resize-arrows.h
new file mode 100644
index 000000000..2ef73019b
--- /dev/null
+++ b/test/resize-arrows.h
@@ -0,0 +1,50 @@
+//
+// Resize example for use in the Fast Light Tool Kit (FLTK) documentation.
+//
+//     See Article #415: How does resizing work?
+//     https://www.fltk.org/articles.php?L415
+//
+// Copyright 1998-2020 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#ifndef RESIZE_ARROWS_H
+#define RESIZE_ARROWS_H
+
+#include <FL/Fl.H>
+#include <FL/Fl_Box.H>
+
+/** Harrow is an Fl_Box with a horizontal arrow drawn across the middle.
+
+    The arrow is drawn in black on a white background.
+    By default, the box has no border, and the label is below the box.
+ */
+class Harrow : public Fl_Box {
+public:
+  Harrow(int X, int Y, int W, int H, const char *T = 0);
+
+  void draw();
+};
+
+/** Varrow is an Fl_Box with a vertical arrow drawn down the middle.
+
+    The arrow is drawn in black on a white background.
+    By default, the box has no border, and the label is to the right of the box.
+ */
+class Varrow : public Fl_Box {
+public:
+  Varrow(int X, int Y, int W, int H, const char *T = 0);
+
+  void draw();
+};
+
+#endif // RESIZE_ARROWS_H