/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tools.perflib.vmtrace.viz;
import junit.framework.TestCase;
import java.awt.*;
public class ZoomPanInteractorTest extends TestCase {
private ZoomPanInteractor mZoomPanInteractor;
Point src = new Point();
Point dst = new Point();
@Override
protected void setUp() throws Exception {
mZoomPanInteractor = new ZoomPanInteractor();
}
public void testTranslation() {
mZoomPanInteractor.translateBy(10, -20);
src.setLocation(1, 2);
mZoomPanInteractor.getTransform().transform(src, dst);
assertEquals(11, dst.x);
assertEquals(-18, dst.y);
}
public void testScaleByOrigin() {
mZoomPanInteractor.zoomBy(4, 5, new Point(0, 0));
src.setLocation(2, 3);
mZoomPanInteractor.getTransform().transform(src, dst);
assertEquals(2 * 4, dst.x);
assertEquals(3 * 5, dst.y);
}
public void testScaleByLocation() {
mZoomPanInteractor.zoomBy(4, 5, new Point(20, 0));
src.setLocation(1, 5);
mZoomPanInteractor.getTransform().transform(src, dst);
// Zooming 4 times from 20 => origin is now at (-4 * 20 + 20) = -60
// So x = 1 => -60 + 1*4 = -56
assertEquals(-56, dst.x);
// No translation for y, just zoom
assertEquals(5 * 5, dst.y);
}
}