1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.gesture.cts; 17 18 import android.gesture.GesturePoint; 19 import android.gesture.GestureStroke; 20 import android.graphics.Path; 21 import android.graphics.RectF; 22 23 import java.util.ArrayList; 24 25 import junit.framework.Assert; 26 27 /** 28 * Helper class that generates a simple line GestureStroke, and provides common methods 29 * to validate values calculated from it. 30 */ 31 class LineGestureStrokeHelper { 32 33 // point constants for 45 degree line gesture 34 // points have identical x and y coordinates 35 final static float LINE_START_POINT = 0; 36 final static int START_TIMESTAMP = 0; 37 final static float LINE_END_POINT = 20; 38 final static float LINE_MIDWAY_POINT = LINE_END_POINT/2; 39 final static float LINE_QUARTER_POINT = LINE_MIDWAY_POINT/2; 40 final static int END_TIMESTAMP = 1; 41 final static float LINE_ANGLE = 45; 42 43 /** 44 * Creates a standard straight line gesture starting from the {@link LINE_START_POINT} and 45 * {@link LINE_END_POINT} 46 */ 47 GestureStroke createLineGesture() { 48 return createGestureStroke( 49 new GesturePoint(LINE_START_POINT, LINE_START_POINT, START_TIMESTAMP), 50 new GesturePoint(LINE_END_POINT, LINE_END_POINT, END_TIMESTAMP)); 51 } 52 53 /** 54 * Helper method to assert expected values for a path derived from createLineGesture 55 * 56 * @throws {@link junit.framework.AssertionFailedError} if linePath attributes differs from 57 * expected values 58 */ 59 void assertLineBoundingBox(Path linePath) { 60 Assert.assertFalse(linePath.isEmpty()); 61 RectF bounds = new RectF(); 62 linePath.computeBounds(bounds, true); 63 // TODO: is it a compatability requirement that these numbers be consistent? 64 // expect a square bounding box, starting at LINE_START_POINT and bounded by 65 // LINE_MIDWAY_POINT 66 Assert.assertEquals(LINE_MIDWAY_POINT, bounds.bottom); 67 Assert.assertEquals(LINE_START_POINT, bounds.left); 68 Assert.assertEquals(LINE_MIDWAY_POINT, bounds.right); 69 Assert.assertEquals(LINE_START_POINT, bounds.top); 70 } 71 72 /** 73 * Helper method to assert expected values for a bounds derived from createLineGesture 74 * 75 * @throws AssertionFailedError if linePath attributes differs from expected values 76 */ 77 void assertLineBoundingBox(RectF bounds) { 78 // expect a square bounding box, starting at LINE_START_POINT and bounded by 79 // LINE_END_POINT 80 Assert.assertEquals(LINE_END_POINT, bounds.bottom); 81 Assert.assertEquals(LINE_START_POINT, bounds.left); 82 Assert.assertEquals(LINE_END_POINT, bounds.right); 83 Assert.assertEquals(LINE_START_POINT, bounds.top); 84 } 85 86 /** 87 * Helper method for creating a gesture stroke 88 */ 89 GestureStroke createGestureStroke(GesturePoint... points) { 90 ArrayList<GesturePoint> list = new ArrayList<GesturePoint>(points.length); 91 for (GesturePoint point : points) { 92 list.add(point); 93 } 94 return new GestureStroke(list); 95 } 96 } 97
