Adding samples.

ueforth/examples/boxes.fs

@@ -0,0 +1,57 @@
+#! /usr/bin/env ueforth
+\ Copyright 2022 Bradley D. Nelson
+\
+\ Licensed under the Apache License, Version 2.0 (the "License");
+\ you may not use this file except in compliance with the License.
+\ You may obtain a copy of the License at
+\
+\     http://www.apache.org/licenses/LICENSE-2.0
+\
+\ Unless required by applicable law or agreed to in writing, software
+\ distributed under the License is distributed on an "AS IS" BASIS,
+\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+\ See the License for the specific language governing permissions and
+\ limitations under the License.
+
+grf
+
+-1 -1 window
+
+$ff0000 constant red
+$ffff00 constant yellow
+$00ff00 constant green
+$0000ff constant blue
+$000000 constant black
+$ffffff constant white
+$cccccc constant gray
+$777777 constant dark-gray
+
+: run
+  begin
+    poll
+    IDLE event = if
+      black to color 0 0 width height box
+      g{
+        vertical-flip
+        640 480 viewport
+        gray to color
+        0 0 640 480 box
+        dark-gray to color
+        0 0 400 300 box
+        g{
+          mouse-x mouse-y screen>g translate
+          LEFT-BUTTON pressed? if
+            g{ -100 -100 translate  red to color     -50 -50 100 100 box }g
+            g{ 100 -100 translate   yellow to color  -50 -50 100 100 box }g
+            g{ -100 100 translate   green to color   -50 -50 100 100 box }g
+            g{ 100 100 translate    blue to color    -50 -50 100 100 box }g
+          then
+          g{ white to color   -50 -50 100 100 box }g
+        }g
+      }g
+      flip
+    then
+  event FINISHED = until
+  bye
+;
+run

ueforth/examples/min_grf.fs

@@ -0,0 +1,38 @@
+#! /usr/bin/env ueforth
+\ Copyright 2022 Bradley D. Nelson
+\
+\ Licensed under the Apache License, Version 2.0 (the "License");
+\ you may not use this file except in compliance with the License.
+\ You may obtain a copy of the License at
+\
+\     http://www.apache.org/licenses/LICENSE-2.0
+\
+\ Unless required by applicable law or agreed to in writing, software
+\ distributed under the License is distributed on an "AS IS" BASIS,
+\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+\ See the License for the specific language governing permissions and
+\ limitations under the License.
+
+grf
+
+-1 -1 window
+
+$ff0000 constant red
+$ffff00 constant yellow
+$000000 constant black
+
+: draw
+  black to color  0 0 width height box
+  yellow to color  0 0 width 2/ height 2/ box
+  red to color    mouse-x mouse-y width 10 / height 10 / box
+  flip
+;
+
+: run
+  begin
+    poll
+    IDLE event = if draw then
+  event FINISHED = until
+  bye
+;
+run