source: josm/trunk/test/unit/org/openstreetmap/josm/gui/MapViewStateTest.java @ 10867

Last change on this file since 10867 was 10867, checked in by Don-vip, 3 years ago

fix #13397 - segment did not display anymore middle plus signs (patch by michael2402) - regression of r10827 or r10824 - gsoc-core

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File size: 8.7 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui;
3
4import static org.junit.Assert.assertEquals;
5
6import java.awt.geom.AffineTransform;
7import java.awt.geom.Point2D;
8import java.util.Arrays;
9import java.util.function.Function;
10
11import org.junit.Before;
12import org.junit.BeforeClass;
13import org.junit.Test;
14import org.openstreetmap.josm.JOSMFixture;
15import org.openstreetmap.josm.Main;
16import org.openstreetmap.josm.data.coor.EastNorth;
17import org.openstreetmap.josm.data.coor.LatLon;
18import org.openstreetmap.josm.gui.MapViewState.MapViewPoint;
19import org.openstreetmap.josm.gui.MapViewState.MapViewRectangle;
20
21/**
22 * Test {@link MapViewState}
23 * @author Michael Zangl
24 */
25public class MapViewStateTest {
26
27    private static final int WIDTH = 301;
28    private static final int HEIGHT = 200;
29    private MapViewState state;
30
31    /**
32     * Setup test.
33     */
34    @BeforeClass
35    public static void setUpBeforeClass() {
36        JOSMFixture.createUnitTestFixture().init();
37    }
38
39    /**
40     * Create the default state.
41     */
42    @Before
43    public void setUp() {
44        state = MapViewState.createDefaultState(WIDTH, HEIGHT);
45    }
46
47    private void doTestGetCenter(Function<MapViewState, MapViewPoint> getter, Function<Integer, Double> divider) {
48        MapViewPoint center = getter.apply(state);
49        assertHasViewCoords(divider.apply(WIDTH), divider.apply(HEIGHT), center);
50
51        MapViewState newState = state.movedTo(center, new EastNorth(3, 4));
52
53        // state should not change, but new state should.
54        center = getter.apply(state);
55        assertHasViewCoords(divider.apply(WIDTH), divider.apply(HEIGHT), center);
56
57        center = getter.apply(newState);
58        assertEquals("east", 3, center.getEastNorth().east(), 0.01);
59        assertEquals("north", 4, center.getEastNorth().north(), 0.01);
60    }
61
62    /**
63     * Test {@link MapViewState#getCenter()} returns map view center.
64     */
65    @Test
66    public void testGetCenter() {
67        doTestGetCenter(s -> s.getCenter(), t -> t / 2d);
68    }
69
70    /**
71     * Test {@link MapViewState#getCenterAtPixel()} returns map view center.
72     */
73    @Test
74    public void testGetCenterAtPixel() {
75        doTestGetCenter(s -> s.getCenterAtPixel(), t -> (double) (t / 2));
76    }
77
78    private static void assertHasViewCoords(double x, double y, MapViewPoint center) {
79        assertEquals("x", x, center.getInViewX(), 0.01);
80        assertEquals("y", y, center.getInViewY(), 0.01);
81        assertEquals("x", x, center.getInView().getX(), 0.01);
82        assertEquals("y", y, center.getInView().getY(), 0.01);
83    }
84
85    /**
86     * Test {@link MapViewState#getForView(double, double)}
87     */
88    @Test
89    public void testGetForView() {
90        MapViewPoint corner = state.getForView(0, 0);
91        assertHasViewCoords(0, 0, corner);
92
93        MapViewPoint middle = state.getForView(120, 130);
94        assertHasViewCoords(120, 130, middle);
95
96        MapViewPoint fraction = state.getForView(0.12, 0.7);
97        assertHasViewCoords(0.12, 0.7, fraction);
98
99        MapViewPoint negative = state.getForView(-17, -30);
100        assertHasViewCoords(-17, -30, negative);
101    }
102
103    /**
104     * Test {@link MapViewState#getViewWidth()} and {@link MapViewState#getViewHeight()}
105     */
106    @Test
107    public void testGetViewSize() {
108        assertEquals(WIDTH, state.getViewWidth(), 0.01);
109        assertEquals(HEIGHT, state.getViewHeight(), 0.01);
110    }
111
112    /**
113     * Tests that all coordinate conversions for the point work.
114     */
115    @Test
116    public void testPointConversions() {
117        MapViewPoint p = state.getForView(WIDTH / 2d, HEIGHT / 2d);
118        assertHasViewCoords(WIDTH / 2d, HEIGHT / 2d, p);
119
120        EastNorth eastnorth = p.getEastNorth();
121        LatLon shouldLatLon = Main.getProjection().getWorldBoundsLatLon().getCenter();
122        EastNorth shouldEastNorth = Main.getProjection().latlon2eastNorth(shouldLatLon);
123        assertEquals("east", shouldEastNorth.east(), eastnorth.east(), 0.01);
124        assertEquals("north", shouldEastNorth.north(), eastnorth.north(), 0.01);
125        MapViewPoint reversed = state.getPointFor(shouldEastNorth);
126        assertHasViewCoords(WIDTH / 2d, HEIGHT / 2d, reversed);
127
128        LatLon latlon = p.getLatLon();
129        assertEquals("lat", shouldLatLon.lat(), latlon.lat(), 0.01);
130        assertEquals("lon", shouldLatLon.lon(), latlon.lon(), 0.01);
131
132        MapViewPoint p2 = state.getPointFor(new EastNorth(2, 3));
133        assertEquals("east", 2, p2.getEastNorth().east(), 0.01);
134        assertEquals("north", 3, p2.getEastNorth().north(), 0.01);
135    }
136
137    /**
138     * Test {@link MapViewState#getAffineTransform()}
139     */
140    @Test
141    public void testGetAffineTransform() {
142        for (EastNorth en : Arrays.asList(new EastNorth(100, 100), new EastNorth(0, 0), new EastNorth(300, 200),
143                new EastNorth(-1, -2.5))) {
144            MapViewPoint should = state.getPointFor(en);
145            AffineTransform transform = state.getAffineTransform();
146            Point2D result = transform.transform(new Point2D.Double(en.getX(), en.getY()), null);
147
148            assertEquals("x", should.getInViewX(), result.getX(), 0.01);
149            assertEquals("y", should.getInViewY(), result.getY(), 0.01);
150        }
151    }
152
153    /**
154     * Test {@link MapViewState#OUTSIDE_BOTTOM} and similar constants.
155     */
156    @Test
157    public void testOutsideFlags() {
158        assertEquals(1, Integer.bitCount(MapViewState.OUTSIDE_BOTTOM));
159        assertEquals(1, Integer.bitCount(MapViewState.OUTSIDE_TOP));
160        assertEquals(1, Integer.bitCount(MapViewState.OUTSIDE_LEFT));
161        assertEquals(1, Integer.bitCount(MapViewState.OUTSIDE_RIGHT));
162        assertEquals(4, Integer.bitCount(MapViewState.OUTSIDE_BOTTOM | MapViewState.OUTSIDE_TOP
163                | MapViewState.OUTSIDE_LEFT | MapViewState.OUTSIDE_RIGHT));
164    }
165
166    /**
167     * Test {@link MapViewPoint#getOutsideRectangleFlags(MapViewRectangle)}
168     */
169    @Test
170    public void testPointGetOutsideRectangleFlags() {
171        MapViewRectangle rect = state.getForView(0, 0).rectTo(state.getForView(10, 10));
172        assertEquals(0, state.getForView(1, 1).getOutsideRectangleFlags(rect));
173        assertEquals(0, state.getForView(1, 5).getOutsideRectangleFlags(rect));
174        assertEquals(0, state.getForView(9, 1).getOutsideRectangleFlags(rect));
175        assertEquals(0, state.getForView(10 - 1e-10, 1e-10).getOutsideRectangleFlags(rect));
176        assertEquals(0, state.getForView(10 - 1e-10, 10 - 1e-10).getOutsideRectangleFlags(rect));
177
178
179        assertEquals(MapViewState.OUTSIDE_TOP, state.getForView(1, -11).getOutsideRectangleFlags(rect));
180        assertEquals(MapViewState.OUTSIDE_TOP, state.getForView(1, -1e20).getOutsideRectangleFlags(rect));
181
182        assertEquals(MapViewState.OUTSIDE_BOTTOM, state.getForView(1, 11).getOutsideRectangleFlags(rect));
183        assertEquals(MapViewState.OUTSIDE_BOTTOM, state.getForView(1, 1e20).getOutsideRectangleFlags(rect));
184
185        assertEquals(MapViewState.OUTSIDE_LEFT, state.getForView(-11, 1).getOutsideRectangleFlags(rect));
186        assertEquals(MapViewState.OUTSIDE_LEFT, state.getForView(-1e20, 1).getOutsideRectangleFlags(rect));
187        assertEquals(MapViewState.OUTSIDE_RIGHT, state.getForView(11, 1).getOutsideRectangleFlags(rect));
188        assertEquals(MapViewState.OUTSIDE_RIGHT, state.getForView(1e20, 1).getOutsideRectangleFlags(rect));
189
190        assertEquals(MapViewState.OUTSIDE_RIGHT | MapViewState.OUTSIDE_TOP, state.getForView(11, -11).getOutsideRectangleFlags(rect));
191        assertEquals(MapViewState.OUTSIDE_RIGHT | MapViewState.OUTSIDE_BOTTOM, state.getForView(11, 11).getOutsideRectangleFlags(rect));
192        assertEquals(MapViewState.OUTSIDE_LEFT | MapViewState.OUTSIDE_TOP, state.getForView(-11, -11).getOutsideRectangleFlags(rect));
193        assertEquals(MapViewState.OUTSIDE_LEFT | MapViewState.OUTSIDE_BOTTOM, state.getForView(-11, 11).getOutsideRectangleFlags(rect));
194    }
195
196    /**
197     * Test {@link MapViewPoint#oneNormInView(MapViewPoint)}
198     */
199    @Test
200    public void testPointOneNormInView() {
201        MapViewPoint p = state.getForView(5, 15);
202        assertEquals(0, p.oneNormInView(p), 1e-10);
203        assertEquals(6, p.oneNormInView(state.getForView(-1, 15)), 1e-10);
204        assertEquals(5, p.oneNormInView(state.getForView(5, 20)), 1e-10);
205        assertEquals(22, p.oneNormInView(state.getForView(-1, -1)), 1e-10);
206        assertEquals(40, p.oneNormInView(state.getForView(30, 30)), 1e-10);
207    }
208
209    /**
210     * Test {@link MapViewState.MapViewViewPoint#toString()} and {@link MapViewState.MapViewEastNorthPoint#toString()}
211     */
212    @Test
213    public void testToString() {
214        assertEquals("MapViewViewPoint [x=1.0, y=2.0]",
215                state.getForView(1, 2).toString());
216        assertEquals("MapViewEastNorthPoint [eastNorth=EastNorth[e=0.0, n=0.0]]",
217                state.getPointFor(new EastNorth(0, 0)).toString());
218    }
219}
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