1635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project/* 206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * Copyright (C) 2010 Google Inc. All rights reserved. 30bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 4635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * Redistribution and use in source and binary forms, with or without 5635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * modification, are permitted provided that the following conditions are 6635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * met: 70bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 8635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * * Redistributions of source code must retain the above copyright 9635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * notice, this list of conditions and the following disclaimer. 10635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * * Redistributions in binary form must reproduce the above 11635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * copyright notice, this list of conditions and the following disclaimer 12635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * in the documentation and/or other materials provided with the 13635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * distribution. 14635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * * Neither the name of Google Inc. nor the names of its 15635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * contributors may be used to endorse or promote products derived from 16635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * this software without specific prior written permission. 170bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 18635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project */ 30635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 3106ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#ifndef DragScrollTimer_h 3206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#define DragScrollTimer_h 33635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 3406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#include "IntSize.h" 3506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#include "Timer.h" 3606ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#include "WebPoint.h" 37d0825bca7fe65beaee391d30da42e937db621564Steve Block 3806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsennamespace WebCore { class FrameView; } 39635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 4006ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsennamespace WebKit { 41635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 4206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen// 4306ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen// Encapsulating a timer and associated state management for 4406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen// scroll-on-drag behaviour. 4506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen// 4606ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsenclass DragScrollTimer { 4706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsenpublic: 4806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen DragScrollTimer(); 4906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen ~DragScrollTimer(); 50635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 5106ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen void fired(WebCore::Timer<DragScrollTimer>*) { update(); } 5206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen void triggerScroll(WebCore::FrameView*, const WebPoint&); 5306ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen void stop(); 5406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen 5506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsenprivate: 5606ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen void scroll(); 5706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen void update(); 5806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen WebCore::IntSize scrollDistanceFor(WebCore::FrameView*, const WebPoint&) const; 5906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen bool shouldScroll() const { return !m_lastDistance.isZero(); } 60635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 6106ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen WebCore::Timer<DragScrollTimer> m_timer; 6206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen WebCore::FrameView* m_view; 6306ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen WebCore::IntSize m_lastDistance; 6406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen bool m_scrolling; 6506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen}; 66d0825bca7fe65beaee391d30da42e937db621564Steve Block 6706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen} // namespace WebKit 68635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 6906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen#endif 70