1 /* 2 * Copyright (C) 2008 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 17 package android.text.method.cts; 18 19 20 import android.app.Activity; 21 import android.os.SystemClock; 22 import android.test.ActivityInstrumentationTestCase2; 23 import android.text.Layout; 24 import android.text.Spannable; 25 import android.text.SpannableString; 26 import android.text.TextPaint; 27 import android.text.method.Touch; 28 import android.util.DisplayMetrics; 29 import android.view.MotionEvent; 30 import android.widget.TextView; 31 32 public class TouchTest extends ActivityInstrumentationTestCase2<StubActivity> { 33 private Activity mActivity; 34 private static final String LONG_TEXT = "Scrolls the specified widget to the specified " + 35 "coordinates, except constrains the X scrolling position to the horizontal regions " + 36 "of the text that will be visible after scrolling to the specified Y position." + 37 "This is the description of the test."; 38 39 private boolean mReturnFromTouchEvent; 40 41 public TouchTest() { 42 super("com.android.cts.stub", StubActivity.class); 43 } 44 45 @Override 46 protected void setUp() throws Exception { 47 super.setUp(); 48 mActivity = getActivity(); 49 } 50 51 public void testScrollTo() throws Throwable { 52 final TextView tv = new TextView(mActivity); 53 runTestOnUiThread(new Runnable() { 54 public void run() { 55 mActivity.setContentView(tv); 56 tv.setSingleLine(true); 57 tv.setLines(2); 58 } 59 }); 60 getInstrumentation().waitForIdleSync(); 61 TextPaint paint = tv.getPaint(); 62 final Layout layout = tv.getLayout(); 63 64 runTestOnUiThread(new Runnable() { 65 public void run() { 66 tv.setText(LONG_TEXT); 67 } 68 }); 69 getInstrumentation().waitForIdleSync(); 70 71 // get the total length of string 72 final int width = getTextWidth(LONG_TEXT, paint); 73 74 runTestOnUiThread(new Runnable() { 75 public void run() { 76 Touch.scrollTo(tv, layout, width - tv.getWidth() - 1, 0); 77 } 78 }); 79 getInstrumentation().waitForIdleSync(); 80 assertEquals(width - tv.getWidth() - 1, tv.getScrollX()); 81 assertEquals(0, tv.getScrollY()); 82 83 // the X to which scroll is greater than the total length of string. 84 runTestOnUiThread(new Runnable() { 85 public void run() { 86 Touch.scrollTo(tv, layout, width + 100, 5); 87 } 88 }); 89 getInstrumentation().waitForIdleSync(); 90 assertEquals(width - tv.getWidth(), tv.getScrollX(), 1.0f); 91 assertEquals(5, tv.getScrollY()); 92 93 runTestOnUiThread(new Runnable() { 94 public void run() { 95 Touch.scrollTo(tv, layout, width - 10, 5); 96 } 97 }); 98 getInstrumentation().waitForIdleSync(); 99 assertEquals(width - tv.getWidth(), tv.getScrollX(), 1.0f); 100 assertEquals(5, tv.getScrollY()); 101 } 102 103 public void testOnTouchEvent() throws Throwable { 104 final TextView tv = new TextView(mActivity); 105 106 // Create a string that is wider than the screen. 107 DisplayMetrics metrics = mActivity.getResources().getDisplayMetrics(); 108 int screenWidth = metrics.widthPixels; 109 TextPaint paint = tv.getPaint(); 110 String text = LONG_TEXT; 111 int textWidth = Math.round(paint.measureText(text)); 112 while (textWidth < screenWidth) { 113 text += LONG_TEXT; 114 textWidth = Math.round(paint.measureText(text)); 115 } 116 117 // Drag the difference between the text width and the screen width. 118 int dragAmount = Math.min(screenWidth, textWidth - screenWidth); 119 assertTrue(dragAmount > 0); 120 final String finalText = text; 121 final SpannableString spannable = new SpannableString(finalText); 122 runTestOnUiThread(new Runnable() { 123 public void run() { 124 mActivity.setContentView(tv); 125 tv.setSingleLine(true); 126 tv.setText(finalText); 127 } 128 }); 129 getInstrumentation().waitForIdleSync(); 130 131 long downTime = SystemClock.uptimeMillis(); 132 long eventTime = SystemClock.uptimeMillis(); 133 final MotionEvent event1 = MotionEvent.obtain(downTime, eventTime, 134 MotionEvent.ACTION_DOWN, dragAmount, 0, 0); 135 final MotionEvent event2 = MotionEvent.obtain(downTime, eventTime, 136 MotionEvent.ACTION_MOVE, 0, 0, 0); 137 final MotionEvent event3 = MotionEvent.obtain(downTime, eventTime, 138 MotionEvent.ACTION_UP, 0, 0, 0); 139 assertEquals(0, tv.getScrollX()); 140 assertEquals(0, tv.getScrollY()); 141 mReturnFromTouchEvent = false; 142 runTestOnUiThread(new Runnable() { 143 public void run() { 144 mReturnFromTouchEvent = Touch.onTouchEvent(tv, spannable, event1); 145 } 146 }); 147 getInstrumentation().waitForIdleSync(); 148 assertTrue(mReturnFromTouchEvent); 149 // TextView has not been scrolled. 150 assertEquals(0, tv.getScrollX()); 151 assertEquals(0, tv.getScrollY()); 152 assertEquals(0, Touch.getInitialScrollX(tv, spannable)); 153 assertEquals(0, Touch.getInitialScrollY(tv, spannable)); 154 155 mReturnFromTouchEvent = false; 156 runTestOnUiThread(new Runnable() { 157 public void run() { 158 mReturnFromTouchEvent = Touch.onTouchEvent(tv, spannable, event2); 159 } 160 }); 161 getInstrumentation().waitForIdleSync(); 162 assertTrue(mReturnFromTouchEvent); 163 // TextView has been scrolled. 164 assertEquals(dragAmount, tv.getScrollX()); 165 assertEquals(0, tv.getScrollY()); 166 assertEquals(0, Touch.getInitialScrollX(tv, spannable)); 167 assertEquals(0, Touch.getInitialScrollY(tv, spannable)); 168 169 mReturnFromTouchEvent = false; 170 runTestOnUiThread(new Runnable() { 171 public void run() { 172 mReturnFromTouchEvent = Touch.onTouchEvent(tv, spannable, event3); 173 } 174 }); 175 getInstrumentation().waitForIdleSync(); 176 assertTrue(mReturnFromTouchEvent); 177 // TextView has not been scrolled. 178 assertEquals(dragAmount, tv.getScrollX()); 179 assertEquals(0, tv.getScrollY()); 180 assertEquals(-1, Touch.getInitialScrollX(tv, spannable)); 181 assertEquals(-1, Touch.getInitialScrollY(tv, spannable)); 182 } 183 184 private int getTextWidth(String str, TextPaint paint) { 185 float totalWidth = 0f; 186 float[] widths = new float[str.length()]; 187 paint.getTextWidths(str, widths); 188 for (float f : widths) { 189 totalWidth += f; 190 } 191 return (int) totalWidth; 192 } 193 } 194
