Add Canvas
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8f998da8a8
commit
d60194c504
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@ -0,0 +1,36 @@
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using System;
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namespace Ooui
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{
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public class Canvas : Element
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{
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Context2d context2d = new Context2d ();
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int gotContext2d = 0;
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public Canvas ()
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: base ("canvas")
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{
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}
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public Context2d GetContext2d ()
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{
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if (System.Threading.Interlocked.CompareExchange (ref gotContext2d, 1, 0) == 0) {
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var mcall = Message.Call (Id, "getContext", "2d");
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mcall.ResultId = context2d.Id;
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Send (mcall);
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}
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return context2d;
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}
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protected override void SaveStateMessageIfNeeded (Message message)
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{
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switch (message.MessageType) {
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case MessageType.Call when message.Key == "getContext" && message.Value is Array a && a.Length == 1 && "2d".Equals (a.GetValue (0)):
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AddStateMessage (message);
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break;
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default:
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base.SaveStateMessageIfNeeded (message);
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break;
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}
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}
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}
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}
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@ -75,7 +75,10 @@ function msgCall (m) {
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}
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const f = node[m.k];
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if (debug) console.log ("Call", node, f, m.v);
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f.apply (node, m.v);
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const r = f.apply (node, m.v);
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if (typeof m.rid === 'string' || m.rid instanceof String) {
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nodes[m.rid] = r;
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}
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}
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function msgListen (m) {
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@ -0,0 +1,10 @@
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namespace Ooui
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{
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public class Context2d : EventTarget
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{
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public Context2d()
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: base ("context2d")
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{
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}
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}
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}
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@ -19,6 +19,9 @@ namespace Ooui
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[JsonProperty("v", NullValueHandling = NullValueHandling.Ignore)]
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public object Value = null;
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[JsonProperty("rid", NullValueHandling = NullValueHandling.Ignore)]
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public string ResultId = null;
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public static Message Call (string targetId, string method, params object[] args) => new Message {
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MessageType = MessageType.Call,
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TargetId = targetId,
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@ -0,0 +1,23 @@
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using System;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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using Ooui;
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namespace Tests
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{
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[TestClass]
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public class CanvasTests
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{
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[TestMethod]
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public void Context2dState ()
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{
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var c = new Canvas ();
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Assert.AreEqual (1, c.StateMessages.Count);
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var c2d = c.GetContext2d ();
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Assert.AreEqual (2, c.StateMessages.Count);
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var c2d2 = c.GetContext2d ();
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Assert.AreEqual (2, c.StateMessages.Count);
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Assert.AreEqual (c2d, c2d2);
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}
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}
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}
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