SetLayoutTests.cs 22 KB

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  1. namespace Terminal.Gui.LayoutTests;
  2. public class SetLayoutTests
  3. {
  4. [Fact]
  5. public void Add_Does_Not_Call_Layout ()
  6. {
  7. var superView = new View { Id = "superView" };
  8. var view = new View { Id = "view" };
  9. var layoutStartedRaised = false;
  10. var layoutCompleteRaised = false;
  11. superView.SubViewLayout += (sender, e) => layoutStartedRaised = true;
  12. superView.SubViewsLaidOut += (sender, e) => layoutCompleteRaised = true;
  13. superView.Add (view);
  14. Assert.False (layoutStartedRaised);
  15. Assert.False (layoutCompleteRaised);
  16. superView.Remove (view);
  17. superView.Add (view);
  18. Assert.False (layoutStartedRaised);
  19. Assert.False (layoutCompleteRaised);
  20. }
  21. [Fact]
  22. public void Change_Height_or_Width_MakesComputed ()
  23. {
  24. var v = new View { Frame = Rectangle.Empty };
  25. v.Height = Dim.Fill ();
  26. v.Width = Dim.Fill ();
  27. v.Dispose ();
  28. }
  29. [Fact]
  30. public void Change_X_or_Y_Absolute ()
  31. {
  32. var frame = new Rectangle (1, 2, 3, 4);
  33. var newFrame = new Rectangle (10, 20, 3, 4);
  34. var v = new View { Frame = frame };
  35. v.X = newFrame.X;
  36. v.Y = newFrame.Y;
  37. v.Layout ();
  38. Assert.Equal (newFrame, v.Frame);
  39. Assert.Equal (
  40. new (0, 0, newFrame.Width, newFrame.Height),
  41. v.Viewport
  42. ); // With Absolute Viewport *is* deterministic before Layout
  43. Assert.Equal ($"Absolute({newFrame.X})", v.X.ToString ());
  44. Assert.Equal ($"Absolute({newFrame.Y})", v.Y.ToString ());
  45. Assert.Equal (Dim.Absolute (3), v.Width);
  46. Assert.Equal (Dim.Absolute (4), v.Height);
  47. v.Dispose ();
  48. }
  49. [Fact]
  50. public void Change_X_or_Y_MakesComputed ()
  51. {
  52. var v = new View { Frame = Rectangle.Empty };
  53. v.X = Pos.Center ();
  54. v.Y = Pos.Center ();
  55. v.Dispose ();
  56. }
  57. [Fact]
  58. public void Change_X_Y_Height_Width_Absolute ()
  59. {
  60. var v = new View { Frame = Rectangle.Empty };
  61. v.X = 1;
  62. v.Y = 2;
  63. v.Height = 3;
  64. v.Width = 4;
  65. v.Dispose ();
  66. v = new () { Frame = Rectangle.Empty };
  67. v.X = Pos.Center ();
  68. v.Y = Pos.Center ();
  69. v.Width = Dim.Fill ();
  70. v.Height = Dim.Fill ();
  71. v.Dispose ();
  72. v = new () { Frame = Rectangle.Empty };
  73. v.X = Pos.Center ();
  74. v.Y = Pos.Center ();
  75. v.Width = Dim.Fill ();
  76. v.Height = Dim.Fill ();
  77. v.X = 1;
  78. v.Dispose ();
  79. v = new () { Frame = Rectangle.Empty };
  80. v.X = Pos.Center ();
  81. v.Y = Pos.Center ();
  82. v.Width = Dim.Fill ();
  83. v.Height = Dim.Fill ();
  84. v.Y = 2;
  85. v.Dispose ();
  86. v = new () { Frame = Rectangle.Empty };
  87. v.X = Pos.Center ();
  88. v.Y = Pos.Center ();
  89. v.Width = Dim.Fill ();
  90. v.Height = Dim.Fill ();
  91. v.Width = 3;
  92. v.Dispose ();
  93. v = new () { Frame = Rectangle.Empty };
  94. v.X = Pos.Center ();
  95. v.Y = Pos.Center ();
  96. v.Width = Dim.Fill ();
  97. v.Height = Dim.Fill ();
  98. v.Height = 3;
  99. v.Dispose ();
  100. v = new () { Frame = Rectangle.Empty };
  101. v.X = Pos.Center ();
  102. v.Y = Pos.Center ();
  103. v.Width = Dim.Fill ();
  104. v.Height = Dim.Fill ();
  105. v.X = 1;
  106. v.Y = 2;
  107. v.Height = 3;
  108. v.Width = 4;
  109. v.Dispose ();
  110. }
  111. [Fact]
  112. public void Constructor ()
  113. {
  114. var v = new View ();
  115. v.Dispose ();
  116. var frame = Rectangle.Empty;
  117. v = new () { Frame = frame };
  118. v.Layout ();
  119. Assert.Equal (frame, v.Frame);
  120. Assert.Equal (
  121. new (0, 0, frame.Width, frame.Height),
  122. v.Viewport
  123. ); // With Absolute Viewport *is* deterministic before Layout
  124. Assert.Equal (Pos.Absolute (0), v.X);
  125. Assert.Equal (Pos.Absolute (0), v.Y);
  126. Assert.Equal (Dim.Absolute (0), v.Width);
  127. Assert.Equal (Dim.Absolute (0), v.Height);
  128. v.Dispose ();
  129. frame = new (1, 2, 3, 4);
  130. v = new () { Frame = frame };
  131. v.Layout ();
  132. Assert.Equal (frame, v.Frame);
  133. Assert.Equal (
  134. new (0, 0, frame.Width, frame.Height),
  135. v.Viewport
  136. ); // With Absolute Viewport *is* deterministic before Layout
  137. Assert.Equal (Pos.Absolute (1), v.X);
  138. Assert.Equal (Pos.Absolute (2), v.Y);
  139. Assert.Equal (Dim.Absolute (3), v.Width);
  140. Assert.Equal (Dim.Absolute (4), v.Height);
  141. v.Dispose ();
  142. v = new () { Frame = frame, Text = "v" };
  143. v.Layout ();
  144. Assert.Equal (frame, v.Frame);
  145. Assert.Equal (
  146. new (0, 0, frame.Width, frame.Height),
  147. v.Viewport
  148. ); // With Absolute Viewport *is* deterministic before Layout
  149. Assert.Equal (Pos.Absolute (1), v.X);
  150. Assert.Equal (Pos.Absolute (2), v.Y);
  151. Assert.Equal (Dim.Absolute (3), v.Width);
  152. Assert.Equal (Dim.Absolute (4), v.Height);
  153. v.Dispose ();
  154. v = new () { X = frame.X, Y = frame.Y, Text = "v" };
  155. v.Layout ();
  156. Assert.Equal (new (frame.X, frame.Y, 0, 0), v.Frame);
  157. Assert.Equal (new (0, 0, 0, 0), v.Viewport); // With Absolute Viewport *is* deterministic before Layout
  158. Assert.Equal (Pos.Absolute (1), v.X);
  159. Assert.Equal (Pos.Absolute (2), v.Y);
  160. Assert.Equal (Dim.Absolute (0), v.Width);
  161. Assert.Equal (Dim.Absolute (0), v.Height);
  162. v.Dispose ();
  163. v = new ();
  164. v.Layout ();
  165. Assert.Equal (new (0, 0, 0, 0), v.Frame);
  166. Assert.Equal (new (0, 0, 0, 0), v.Viewport); // With Absolute Viewport *is* deterministic before Layout
  167. Assert.Equal (Pos.Absolute (0), v.X);
  168. Assert.Equal (Pos.Absolute (0), v.Y);
  169. Assert.Equal (Dim.Absolute (0), v.Width);
  170. Assert.Equal (Dim.Absolute (0), v.Height);
  171. v.Dispose ();
  172. v = new () { X = frame.X, Y = frame.Y, Width = frame.Width, Height = frame.Height };
  173. v.Layout ();
  174. Assert.Equal (new (frame.X, frame.Y, 3, 4), v.Frame);
  175. Assert.Equal (new (0, 0, 3, 4), v.Viewport); // With Absolute Viewport *is* deterministic before Layout
  176. Assert.Equal (Pos.Absolute (1), v.X);
  177. Assert.Equal (Pos.Absolute (2), v.Y);
  178. Assert.Equal (Dim.Absolute (3), v.Width);
  179. Assert.Equal (Dim.Absolute (4), v.Height);
  180. v.Dispose ();
  181. }
  182. /// <summary>This is an intentionally obtuse test. See https://github.com/gui-cs/Terminal.Gui/issues/2461</summary>
  183. [Fact]
  184. public void Does_Not_Throw_If_Nested_SubViews_Ref_Topmost_SuperView ()
  185. {
  186. var t = new View { Width = 80, Height = 25, Text = "top" };
  187. var w = new Window
  188. {
  189. Width = Dim.Width (t) - 2, // 78
  190. Height = Dim.Height (t) - 2 // 23
  191. };
  192. var f = new FrameView ();
  193. var v1 = new View
  194. {
  195. Width = Dim.Width (w) - 2, // 76
  196. Height = Dim.Height (w) - 2 // 21
  197. };
  198. var v2 = new View
  199. {
  200. Width = Dim.Width (v1) - 2, // 74
  201. Height = Dim.Height (v1) - 2 // 19
  202. };
  203. f.Width = Dim.Width (t) - Dim.Width (w) + 4; // 80 - 74 = 6
  204. f.Height = Dim.Height (t) - Dim.Height (w) + 4; // 25 - 19 = 6
  205. f.Add (v1, v2);
  206. w.Add (f);
  207. t.Add (w);
  208. t.BeginInit ();
  209. t.EndInit ();
  210. // f references t and w here; t is f's super-superview and w is f's superview. This is supported!
  211. Exception exception = Record.Exception (() => t.Layout ());
  212. Assert.Null (exception);
  213. Assert.Equal (80, t.Frame.Width);
  214. Assert.Equal (25, t.Frame.Height);
  215. Assert.Equal (78, w.Frame.Width);
  216. Assert.Equal (23, w.Frame.Height);
  217. Assert.Equal (6, f.Frame.Width);
  218. Assert.Equal (6, f.Frame.Height);
  219. Assert.Equal (76, v1.Frame.Width);
  220. Assert.Equal (21, v1.Frame.Height);
  221. Assert.Equal (74, v2.Frame.Width);
  222. Assert.Equal (19, v2.Frame.Height);
  223. t.Dispose ();
  224. }
  225. [Fact]
  226. public void LayoutSubViews ()
  227. {
  228. var superRect = new Rectangle (0, 0, 100, 100);
  229. var super = new View { Frame = superRect, Text = "super" };
  230. var v1 = new View { X = 0, Y = 0, Width = 10, Height = 10 };
  231. var v2 = new View { X = 10, Y = 10, Width = 10, Height = 10 };
  232. super.Add (v1, v2);
  233. super.LayoutSubViews ();
  234. Assert.Equal (new (0, 0, 10, 10), v1.Frame);
  235. Assert.Equal (new (10, 10, 10, 10), v2.Frame);
  236. super.Dispose ();
  237. }
  238. [Fact]
  239. public void LayoutSubViews_Honors_IsLayoutNeeded ()
  240. {
  241. // No adornment subviews
  242. var superView = new View ();
  243. var view = new View ();
  244. var layoutStartedCount = 0;
  245. var layoutCompleteCount = 0;
  246. var borderLayoutStartedCount = 0;
  247. var borderLayoutCompleteCount = 0;
  248. view.SubViewLayout += (sender, e) => layoutStartedCount++;
  249. view.SubViewsLaidOut += (sender, e) => layoutCompleteCount++;
  250. view.Border.SubViewLayout += (sender, e) => borderLayoutStartedCount++;
  251. view.Border.SubViewsLaidOut += (sender, e) => borderLayoutCompleteCount++;
  252. superView.Add (view);
  253. superView.LayoutSubViews ();
  254. Assert.Equal (0, borderLayoutStartedCount);
  255. Assert.Equal (0, borderLayoutCompleteCount);
  256. Assert.Equal (1, layoutStartedCount);
  257. Assert.Equal (1, layoutCompleteCount);
  258. superView.LayoutSubViews ();
  259. Assert.Equal (0, borderLayoutStartedCount);
  260. Assert.Equal (0, borderLayoutCompleteCount);
  261. Assert.Equal (1, layoutStartedCount);
  262. Assert.Equal (1, layoutCompleteCount);
  263. superView.SetNeedsLayout ();
  264. superView.LayoutSubViews ();
  265. Assert.Equal (0, borderLayoutStartedCount);
  266. Assert.Equal (0, borderLayoutCompleteCount);
  267. Assert.Equal (2, layoutStartedCount);
  268. Assert.Equal (2, layoutCompleteCount);
  269. // With Border subview
  270. view.Border.Add (new View ());
  271. superView.LayoutSubViews ();
  272. Assert.Equal (1, borderLayoutStartedCount);
  273. Assert.Equal (1, borderLayoutCompleteCount);
  274. Assert.Equal (3, layoutStartedCount);
  275. Assert.Equal (3, layoutCompleteCount);
  276. superView.LayoutSubViews ();
  277. Assert.Equal (1, borderLayoutStartedCount);
  278. Assert.Equal (1, borderLayoutCompleteCount);
  279. Assert.Equal (3, layoutStartedCount);
  280. Assert.Equal (3, layoutCompleteCount);
  281. superView.SetNeedsLayout ();
  282. superView.LayoutSubViews ();
  283. Assert.Equal (2, borderLayoutStartedCount);
  284. Assert.Equal (2, borderLayoutCompleteCount);
  285. Assert.Equal (4, layoutStartedCount);
  286. superView.Dispose ();
  287. }
  288. // Test OnLayoutStarted/OnLayoutComplete - ensure that they are called at right times
  289. [Fact]
  290. public void LayoutSubViews_LayoutStarted_Complete ()
  291. {
  292. var superView = new View ();
  293. var view = new View ();
  294. var layoutStartedCount = 0;
  295. var layoutCompleteCount = 0;
  296. var borderLayoutStartedCount = 0;
  297. var borderLayoutCompleteCount = 0;
  298. view.SubViewLayout += (sender, e) => layoutStartedCount++;
  299. view.SubViewsLaidOut += (sender, e) => layoutCompleteCount++;
  300. view.Border.SubViewLayout += (sender, e) => borderLayoutStartedCount++;
  301. view.Border.SubViewsLaidOut += (sender, e) => borderLayoutCompleteCount++;
  302. superView.Add (view);
  303. Assert.Equal (0, borderLayoutStartedCount);
  304. Assert.Equal (0, borderLayoutCompleteCount);
  305. Assert.Equal (0, layoutStartedCount);
  306. Assert.Equal (0, layoutCompleteCount);
  307. superView.BeginInit ();
  308. Assert.Equal (0, borderLayoutStartedCount);
  309. Assert.Equal (0, borderLayoutCompleteCount);
  310. Assert.Equal (0, layoutStartedCount);
  311. Assert.Equal (0, layoutCompleteCount);
  312. superView.EndInit ();
  313. Assert.Equal (1, borderLayoutStartedCount);
  314. Assert.Equal (1, borderLayoutCompleteCount);
  315. Assert.Equal (2, layoutStartedCount);
  316. Assert.Equal (2, layoutCompleteCount);
  317. superView.LayoutSubViews ();
  318. Assert.Equal (1, borderLayoutStartedCount);
  319. Assert.Equal (1, borderLayoutCompleteCount);
  320. Assert.Equal (3, layoutStartedCount);
  321. Assert.Equal (3, layoutCompleteCount);
  322. superView.SetNeedsLayout ();
  323. superView.LayoutSubViews ();
  324. Assert.Equal (1, borderLayoutStartedCount);
  325. Assert.Equal (1, borderLayoutCompleteCount);
  326. Assert.Equal (4, layoutStartedCount);
  327. Assert.Equal (4, layoutCompleteCount);
  328. superView.Dispose ();
  329. }
  330. [Fact]
  331. public void LayoutSubViews_No_SuperView ()
  332. {
  333. var root = new View ();
  334. var first = new View
  335. {
  336. Id = "first",
  337. X = 1,
  338. Y = 2,
  339. Height = 3,
  340. Width = 4
  341. };
  342. root.Add (first);
  343. var second = new View { Id = "second" };
  344. root.Add (second);
  345. second.X = Pos.Right (first) + 1;
  346. root.LayoutSubViews ();
  347. Assert.Equal (6, second.Frame.X);
  348. root.Dispose ();
  349. first.Dispose ();
  350. second.Dispose ();
  351. }
  352. [Fact]
  353. public void LayoutSubViews_Raises_LayoutStarted_LayoutComplete ()
  354. {
  355. var superView = new View { Id = "superView" };
  356. var layoutStartedRaised = 0;
  357. var layoutCompleteRaised = 0;
  358. superView.SubViewLayout += (sender, e) => layoutStartedRaised++;
  359. superView.SubViewsLaidOut += (sender, e) => layoutCompleteRaised++;
  360. superView.SetNeedsLayout ();
  361. superView.LayoutSubViews ();
  362. Assert.Equal (1, layoutStartedRaised);
  363. Assert.Equal (1, layoutCompleteRaised);
  364. superView.BeginInit ();
  365. superView.EndInit ();
  366. superView.LayoutSubViews ();
  367. Assert.Equal (3, layoutStartedRaised);
  368. Assert.Equal (3, layoutCompleteRaised);
  369. }
  370. [Fact]
  371. public void LayoutSubViews_RootHas_SuperView ()
  372. {
  373. var top = new View ();
  374. var root = new View ();
  375. top.Add (root);
  376. var first = new View
  377. {
  378. Id = "first",
  379. X = 1,
  380. Y = 2,
  381. Height = 3,
  382. Width = 4
  383. };
  384. root.Add (first);
  385. var second = new View { Id = "second" };
  386. root.Add (second);
  387. second.X = Pos.Right (first) + 1;
  388. root.LayoutSubViews ();
  389. Assert.Equal (6, second.Frame.X);
  390. root.Dispose ();
  391. top.Dispose ();
  392. first.Dispose ();
  393. second.Dispose ();
  394. }
  395. [Fact]
  396. public void LayoutSubViews_Uses_ContentSize ()
  397. {
  398. var superView = new View
  399. {
  400. Width = 5,
  401. Height = 5
  402. };
  403. superView.SetContentSize (new (10, 10));
  404. var view = new View
  405. {
  406. X = Pos.Center ()
  407. };
  408. superView.Add (view);
  409. superView.LayoutSubViews ();
  410. Assert.Equal (5, view.Frame.X);
  411. superView.Dispose ();
  412. }
  413. [Fact]
  414. public void LayoutSubViews_ViewThatRefsSubView_Throws ()
  415. {
  416. var root = new View ();
  417. var super = new View ();
  418. root.Add (super);
  419. var sub = new View ();
  420. super.Add (sub);
  421. super.Width = Dim.Width (sub);
  422. Assert.Throws<LayoutException> (() => root.Layout ());
  423. root.Dispose ();
  424. super.Dispose ();
  425. }
  426. /// <summary>
  427. /// This tests the special case in LayoutSubViews. See https://github.com/gui-cs/Terminal.Gui/issues/2461
  428. /// </summary>
  429. [Fact]
  430. public void Nested_SubViews_Ref_Topmost_SuperView ()
  431. {
  432. var superView = new View { Width = 80, Height = 25, Text = "superView" };
  433. var subView1 = new View
  434. {
  435. Id = "subView1 - refs superView",
  436. Width = Dim.Width (superView) - 2, // 78
  437. Height = Dim.Height (superView) - 2 // 23
  438. };
  439. superView.Add (subView1);
  440. var subView1OfSubView1 = new View
  441. {
  442. Id = "subView1OfSubView1 - refs superView",
  443. Width = Dim.Width (superView) - 4, // 76
  444. Height = Dim.Height (superView) - 4 // 21
  445. };
  446. subView1.Add (subView1OfSubView1);
  447. superView.Layout ();
  448. Assert.Equal (80, superView.Frame.Width);
  449. Assert.Equal (25, superView.Frame.Height);
  450. Assert.Equal (78, subView1.Frame.Width);
  451. Assert.Equal (23, subView1.Frame.Height);
  452. //Assert.Equal (76, subView2.Frame.Width);
  453. //Assert.Equal (21, subView2.Frame.Height);
  454. Assert.Equal (76, subView1OfSubView1.Frame.Width);
  455. Assert.Equal (21, subView1OfSubView1.Frame.Height);
  456. superView.Dispose ();
  457. }
  458. [Fact]
  459. public void Set_Height_DimAbsolute_Layout_Is_Implicit ()
  460. {
  461. var v = new View ();
  462. v.Height = 1;
  463. Assert.False (v.NeedsLayout);
  464. Assert.Equal (1, v.Frame.Height);
  465. v.Height = 2;
  466. Assert.False (v.NeedsLayout);
  467. Assert.Equal (2, v.Frame.Height);
  468. v.Height = Dim.Absolute (3);
  469. Assert.False (v.NeedsLayout);
  470. Assert.Equal (3, v.Frame.Height);
  471. v.Height = Dim.Absolute (3) + 1;
  472. Assert.False (v.NeedsLayout);
  473. Assert.Equal (4, v.Frame.Height);
  474. v.Height = 1 + Dim.Absolute (1) + 1;
  475. Assert.False (v.NeedsLayout);
  476. Assert.Equal (3, v.Frame.Height);
  477. }
  478. [Fact]
  479. public void Set_Height_Non_DimAbsolute_Explicit_Layout_Required ()
  480. {
  481. var v = new View ();
  482. v.Height = Dim.Auto ();
  483. Assert.True (v.NeedsLayout);
  484. Assert.Equal (0, v.Frame.Height);
  485. v.Height = Dim.Percent (50);
  486. Assert.True (v.NeedsLayout);
  487. Assert.Equal (0, v.Frame.Height);
  488. v.Height = Dim.Fill ();
  489. Assert.True (v.NeedsLayout);
  490. Assert.Equal (0, v.Frame.Height);
  491. v.Height = Dim.Func (() => 10);
  492. Assert.True (v.NeedsLayout);
  493. Assert.Equal (0, v.Frame.Height);
  494. v.Height = Dim.Height (new ());
  495. Assert.True (v.NeedsLayout);
  496. Assert.Equal (0, v.Frame.Height);
  497. }
  498. [Fact]
  499. public void Set_Width_DimAbsolute_Layout_Is_Implicit ()
  500. {
  501. var v = new View ();
  502. v.Width = 1;
  503. Assert.False (v.NeedsLayout);
  504. Assert.Equal (1, v.Frame.Width);
  505. v.Width = 2;
  506. Assert.False (v.NeedsLayout);
  507. Assert.Equal (2, v.Frame.Width);
  508. v.Width = Dim.Absolute (3);
  509. Assert.False (v.NeedsLayout);
  510. Assert.Equal (3, v.Frame.Width);
  511. v.Width = Dim.Absolute (3) + 1;
  512. Assert.False (v.NeedsLayout);
  513. Assert.Equal (4, v.Frame.Width);
  514. v.Width = 1 + Dim.Absolute (1) + 1;
  515. Assert.False (v.NeedsLayout);
  516. Assert.Equal (3, v.Frame.Width);
  517. }
  518. [Fact]
  519. public void Set_Width_Non_DimAbsolute_Explicit_Layout_Required ()
  520. {
  521. var v = new View ();
  522. v.Width = Dim.Auto ();
  523. Assert.True (v.NeedsLayout);
  524. Assert.Equal (0, v.Frame.Width);
  525. v.Width = Dim.Percent (50);
  526. Assert.True (v.NeedsLayout);
  527. Assert.Equal (0, v.Frame.Width);
  528. v.Width = Dim.Fill ();
  529. Assert.True (v.NeedsLayout);
  530. Assert.Equal (0, v.Frame.Width);
  531. v.Width = Dim.Func (() => 10);
  532. Assert.True (v.NeedsLayout);
  533. Assert.Equal (0, v.Frame.Width);
  534. v.Width = Dim.Width (new ());
  535. Assert.True (v.NeedsLayout);
  536. Assert.Equal (0, v.Frame.Width);
  537. }
  538. [Fact]
  539. public void Set_X_Non_PosAbsolute_Explicit_Layout_Required ()
  540. {
  541. var v = new View ();
  542. v.X = Pos.Center ();
  543. Assert.True (v.NeedsLayout);
  544. Assert.Equal (0, v.Frame.X);
  545. v.X = Pos.Percent (50);
  546. Assert.True (v.NeedsLayout);
  547. Assert.Equal (0, v.Frame.X);
  548. v.X = Pos.Align (Alignment.Center);
  549. Assert.True (v.NeedsLayout);
  550. Assert.Equal (0, v.Frame.X);
  551. v.X = Pos.Func (() => 10);
  552. Assert.True (v.NeedsLayout);
  553. Assert.Equal (0, v.Frame.X);
  554. v.X = Pos.AnchorEnd ();
  555. Assert.True (v.NeedsLayout);
  556. Assert.Equal (0, v.Frame.X);
  557. v.X = Pos.Top (new ());
  558. Assert.True (v.NeedsLayout);
  559. Assert.Equal (0, v.Frame.X);
  560. }
  561. [Fact]
  562. public void Set_X_PosAbsolute_Layout_Is_Implicit ()
  563. {
  564. var v = new View ();
  565. v.X = 1;
  566. Assert.False (v.NeedsLayout);
  567. Assert.Equal (1, v.Frame.X);
  568. v.X = 2;
  569. Assert.False (v.NeedsLayout);
  570. Assert.Equal (2, v.Frame.X);
  571. v.X = Pos.Absolute (3);
  572. Assert.False (v.NeedsLayout);
  573. Assert.Equal (3, v.Frame.X);
  574. v.X = Pos.Absolute (3) + 1;
  575. Assert.False (v.NeedsLayout);
  576. Assert.Equal (4, v.Frame.X);
  577. v.X = 1 + Pos.Absolute (1) + 1;
  578. Assert.False (v.NeedsLayout);
  579. Assert.Equal (3, v.Frame.X);
  580. }
  581. [Fact]
  582. public void Set_Y_Non_PosAbsolute_Explicit_Layout_Required ()
  583. {
  584. var v = new View ();
  585. v.Y = Pos.Center ();
  586. Assert.True (v.NeedsLayout);
  587. Assert.Equal (0, v.Frame.Y);
  588. v.Y = Pos.Percent (50);
  589. Assert.True (v.NeedsLayout);
  590. Assert.Equal (0, v.Frame.Y);
  591. v.Y = Pos.Align (Alignment.Center);
  592. Assert.True (v.NeedsLayout);
  593. Assert.Equal (0, v.Frame.Y);
  594. v.Y = Pos.Func (() => 10);
  595. Assert.True (v.NeedsLayout);
  596. Assert.Equal (0, v.Frame.Y);
  597. v.Y = Pos.AnchorEnd ();
  598. Assert.True (v.NeedsLayout);
  599. Assert.Equal (0, v.Frame.Y);
  600. v.Y = Pos.Top (new ());
  601. Assert.True (v.NeedsLayout);
  602. Assert.Equal (0, v.Frame.Y);
  603. }
  604. [Fact]
  605. public void Set_Y_PosAbsolute_Layout_Is_Implicit ()
  606. {
  607. var v = new View ();
  608. v.Y = 1;
  609. Assert.False (v.NeedsLayout);
  610. Assert.Equal (1, v.Frame.Y);
  611. v.Y = 2;
  612. Assert.False (v.NeedsLayout);
  613. Assert.Equal (2, v.Frame.Y);
  614. v.Y = Pos.Absolute (3);
  615. Assert.False (v.NeedsLayout);
  616. Assert.Equal (3, v.Frame.Y);
  617. v.Y = Pos.Absolute (3) + 1;
  618. Assert.False (v.NeedsLayout);
  619. Assert.Equal (4, v.Frame.Y);
  620. v.Y = 1 + Pos.Absolute (1) + 1;
  621. Assert.False (v.NeedsLayout);
  622. Assert.Equal (3, v.Frame.Y);
  623. }
  624. }