13 files changed, 140 insertions, 0 deletions
diff --git a/MakeIcon.sh b/MakeIcon.sh
new file mode 100755
index 0000000..2446873
--- /dev/null
+++ b/MakeIcon.sh
@@ -0,0 +1,12 @@
+INK=/Applications/Inkscape.app/Contents/MacOS/inkscape
+
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png -w 16 -h 16 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png -w 32 -h 32 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png -w 32 -h 32 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png -w 64 -h 64 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png -w 128 -h 128 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png -w 256 -h 256 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png -w 256 -h 256 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png -w 512 -h 512 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png -w 512 -h 512 SpriteEdIcon.svg
+$INK --export-filename=SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png -w 1024 -h 1024 SpriteEdIcon.svg
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
index 7b432b1..1db583b 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
index 6802108..b4d9088 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
index bbde225..eeb0547 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
index 6d68a93..9b91e57 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
index 6802108..b4d9088 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
index 6f1d2cc..b793618 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
index 6d68a93..9b91e57 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
index 5248646..44c0196 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
index 6f1d2cc..b793618 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
index 2ceaf28..3a32e2c 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
diff --git a/SpriteEd/Util.cs b/SpriteEd/Util.cs
index 4bba750..cca9c47 100644
--- a/SpriteEd/Util.cs
+++ b/SpriteEd/Util.cs
@@ -16,6 +16,7 @@
 //
 using System;
 using System.IO;
+using AppKit;
 
 namespace SpriteEd
 {
@@ -76,5 +77,22 @@ namespace SpriteEd
         {
             return s.ReadByte() == 255;
         }
+
+        /// <summary>
+        /// Display an error alert.
+        /// </summary>
+        /// <param name="title">The title for the alert.</param>
+        /// <param name="message">The message for the alert.</param>
+        public static void DisplayAlert(string title, string message)
+        {
+            NSAlert alert = new NSAlert()
+            {
+                AlertStyle = NSAlertStyle.Critical,
+                InformativeText = message,
+                MessageText = title
+            };
+
+            alert.RunModal();
+        }
     }
 }
diff --git a/SpriteEdIcon.svg b/SpriteEdIcon.svg
new file mode 100644
index 0000000..228badc
--- /dev/null
+++ b/SpriteEdIcon.svg
@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1024"
+   height="1024"
+   viewBox="0 0 270.93333 270.93333"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="SpriteEdIcon.svg"
+   inkscape:version="1.0 (4035a4f, 2020-05-01)"
+   inkscape:export-filename="/Users/ianc/src/SpriteEd/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png"
+   inkscape:export-xdpi="1.5"
+   inkscape:export-ydpi="1.5">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.98994949"
+     inkscape:cx="308.59885"
+     inkscape:cy="569.88877"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer2"
+     inkscape:document-rotation="0"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="2560"
+     inkscape:window-height="1315"
+     inkscape:window-x="0"
+     inkscape:window-y="23"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Pacman"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       d="M 231.43365,229.31625 A 131.36298,131.49661 0 0 1 48.87053,230.80794 131.36298,131.49661 0 0 1 41.134277,48.217157 131.36298,131.49661 0 0 1 223.16796,34.229669 l -83.7869,101.275981 z"
+       sodipodi:arc-type="slice"
+       sodipodi:end="5.404063"
+       sodipodi:start="0.79434821"
+       sodipodi:ry="131.49661"
+       sodipodi:rx="131.36298"
+       sodipodi:cy="135.50565"
+       sodipodi:cx="139.38106"
+       sodipodi:type="arc"
+       id="path322"
+       style="fill:#ffff00;stroke:#ffff00;stroke-width:0.264583" />
+  </g>
+  <g
+     inkscape:label="Pencil"
+     id="layer2"
+     inkscape:groupmode="layer">
+    <rect
+       transform="rotate(-32.531264)"
+       y="183.11769"
+       x="88.145966"
+       height="131.49661"
+       width="26.459681"
+       id="rect325"
+       style="fill:#ff2a2a;stroke:#ff2a2a;stroke-width:0.264583" />
+    <rect
+       transform="rotate(-32.531264)"
+       y="182.85042"
+       x="103.64758"
+       height="131.76387"
+       width="10.958076"
+       id="rect327"
+       style="fill:#ff8080;stroke:#ff8080;stroke-width:0.264583" />
+    <path
+       transform="matrix(0.75732312,-0.48304916,0.53419532,0.83750987,8.9202476,79.989091)"
+       inkscape:transform-center-y="0.023902119"
+       inkscape:transform-center-x="-3.2818732"
+       d="m 137.64382,111.4514 7.32147,-12.779681 7.32147,-12.779679 7.4068,12.730421 7.40679,12.730419 -14.72827,0.0493 z"
+       inkscape:randomized="0"
+       inkscape:rounded="0"
+       inkscape:flatsided="false"
+       sodipodi:arg2="3.661847"
+       sodipodi:arg1="2.6146494"
+       sodipodi:r2="8.5034142"
+       sodipodi:r1="17.006828"
+       sodipodi:cy="102.89877"
+       sodipodi:cx="152.34364"
+       sodipodi:sides="3"
+       id="path329"
+       style="fill:#000000;stroke:#999999;stroke-width:0.264583"
+       sodipodi:type="star" />
+  </g>
+</svg>