| /* |
| * Copyright (C) 2011 Benjamin Poulain <benjamin@webkit.org> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include "config.h" |
| #include "QtPanGestureRecognizer.h" |
| |
| #include "PageViewportControllerClientQt.h" |
| #include "QtWebPageEventHandler.h" |
| |
| namespace WebKit { |
| |
| QtPanGestureRecognizer::QtPanGestureRecognizer(QtWebPageEventHandler* eventHandler) |
| : QtGestureRecognizer(eventHandler) |
| { |
| reset(); |
| } |
| |
| bool QtPanGestureRecognizer::update(const QTouchEvent::TouchPoint& touchPoint, qint64 eventTimestampMillis) |
| { |
| m_lastPosition = touchPoint.pos(); |
| m_lastEventTimestampMillis = eventTimestampMillis; |
| |
| switch (m_state) { |
| case NoGesture: |
| m_state = GestureRecognitionStarted; |
| m_firstScreenPosition = touchPoint.screenPos(); |
| if (viewportController()) |
| viewportController()->cancelScrollAnimation(); |
| return false; |
| case GestureRecognitionStarted: { |
| // To start the gesture, the delta from start in screen coordinates |
| // must be bigger than the trigger threshold. |
| QPointF totalOffsetFromStart(touchPoint.screenPos() - m_firstScreenPosition); |
| if (qAbs(totalOffsetFromStart.x()) < panningInitialTriggerDistanceThreshold && qAbs(totalOffsetFromStart.y()) < panningInitialTriggerDistanceThreshold) |
| return false; |
| |
| m_state = GestureRecognized; |
| if (viewportController()) |
| viewportController()->panGestureStarted(touchPoint.pos(), eventTimestampMillis); |
| return true; |
| } |
| case GestureRecognized: |
| if (viewportController()) |
| viewportController()->panGestureRequestUpdate(touchPoint.pos(), eventTimestampMillis); |
| return true; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| return false; |
| } |
| |
| void QtPanGestureRecognizer::finish(const QTouchEvent::TouchPoint& touchPoint, qint64 eventTimestampMillis) |
| { |
| if (m_state == NoGesture) |
| return; |
| |
| if (viewportController()) |
| viewportController()->panGestureEnded(touchPoint.pos(), eventTimestampMillis); |
| reset(); |
| } |
| |
| void QtPanGestureRecognizer::cancel() |
| { |
| if (m_state == NoGesture) |
| return; |
| |
| if (viewportController()) { |
| viewportController()->panGestureEnded(m_lastPosition, m_lastEventTimestampMillis); |
| viewportController()->panGestureCancelled(); |
| } |
| reset(); |
| } |
| |
| } // namespace WebKit |