Ejemplo n.º 1
0
PassRefPtrWillBeRawPtr<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
{
    return adoptRefWillBeNoop(new WheelEvent(FloatPoint(event.wheelTicksX(), event.wheelTicksY()), FloatPoint(event.deltaX(), event.deltaY()),
        convertDeltaMode(event), view, event.globalPosition(), event.position(),
        event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
        MouseEvent::platformModifiersToButtons(event.modifiers()),
        event.canScroll(), event.hasPreciseScrollingDeltas(),
        static_cast<Event::RailsMode>(event.railsMode())));
}
Ejemplo n.º 2
0
bool ScrollAnimator::handleWheelEvent(const PlatformWheelEvent& e)
{
    bool canScrollX = m_scrollableArea->userInputScrollable(HorizontalScrollbar);
    bool canScrollY = m_scrollableArea->userInputScrollable(VerticalScrollbar);

    // Accept the event if we are scrollable in that direction and can still
    // scroll any further.
    float deltaX = canScrollX ? e.deltaX() : 0;
    float deltaY = canScrollY ? e.deltaY() : 0;

    bool handled = false;

#if !OS(MACOSX)
    ScrollGranularity granularity = e.hasPreciseScrollingDeltas() ? ScrollByPrecisePixel : ScrollByPixel;
#else
    ScrollGranularity granularity = ScrollByPixel;
#endif

    IntSize maxForwardScrollDelta = m_scrollableArea->maximumScrollPosition() - m_scrollableArea->scrollPosition();
    IntSize maxBackwardScrollDelta = m_scrollableArea->scrollPosition() - m_scrollableArea->minimumScrollPosition();
    if ((deltaX < 0 && maxForwardScrollDelta.width() > 0)
        || (deltaX > 0 && maxBackwardScrollDelta.width() > 0)
        || (deltaY < 0 && maxForwardScrollDelta.height() > 0)
        || (deltaY > 0 && maxBackwardScrollDelta.height() > 0)) {
        handled = true;

        if (deltaY) {
            if (e.granularity() == ScrollByPageWheelEvent) {
                bool negative = deltaY < 0;
                deltaY = m_scrollableArea->pageStep(VerticalScrollbar);
                if (negative)
                    deltaY = -deltaY;
            }

            scroll(VerticalScrollbar, granularity, m_scrollableArea->pixelStep(VerticalScrollbar), -deltaY);
        }

        if (deltaX) {
            if (e.granularity() == ScrollByPageWheelEvent) {
                bool negative = deltaX < 0;
                deltaX = m_scrollableArea->pageStep(HorizontalScrollbar);
                if (negative)
                    deltaX = -deltaX;
            }

            scroll(HorizontalScrollbar, granularity, m_scrollableArea->pixelStep(HorizontalScrollbar), -deltaX);
        }
    }
    return handled;
}
Ejemplo n.º 3
0
bool ScrollAnimator::handleWheelEvent(const PlatformWheelEvent& e)
{
    Scrollbar* horizontalScrollbar = m_scrollableArea->horizontalScrollbar();
    Scrollbar* verticalScrollbar = m_scrollableArea->verticalScrollbar();

    // Accept the event if we have a scrollbar in that direction and can still
    // scroll any further.
    float deltaX = horizontalScrollbar ? e.deltaX() : 0;
    float deltaY = verticalScrollbar ? e.deltaY() : 0;

    bool handled = false;

#if PLATFORM(CHROMIUM) && !OS(DARWIN)
    ScrollGranularity granularity = e.hasPreciseScrollingDeltas() ? ScrollByPrecisePixel : ScrollByPixel;
#else
    ScrollGranularity granularity = ScrollByPixel;
#endif

    IntSize maxForwardScrollDelta = m_scrollableArea->maximumScrollPosition() - m_scrollableArea->scrollPosition();
    IntSize maxBackwardScrollDelta = m_scrollableArea->scrollPosition() - m_scrollableArea->minimumScrollPosition();
    if ((deltaX < 0 && maxForwardScrollDelta.width() > 0)
        || (deltaX > 0 && maxBackwardScrollDelta.width() > 0)
        || (deltaY < 0 && maxForwardScrollDelta.height() > 0)
        || (deltaY > 0 && maxBackwardScrollDelta.height() > 0)) {
        handled = true;

        if (deltaY) {
            if (e.granularity() == ScrollByPageWheelEvent) {
                bool negative = deltaY < 0;
                deltaY = max(max(static_cast<float>(m_scrollableArea->visibleHeight()) * Scrollbar::minFractionToStepWhenPaging(), static_cast<float>(m_scrollableArea->visibleHeight() - Scrollbar::maxOverlapBetweenPages())), 1.0f);
                if (negative)
                    deltaY = -deltaY;
            }
            scroll(VerticalScrollbar, granularity, verticalScrollbar->pixelStep(), -deltaY);
        }

        if (deltaX) {
            if (e.granularity() == ScrollByPageWheelEvent) {
                bool negative = deltaX < 0;
                deltaX = max(max(static_cast<float>(m_scrollableArea->visibleWidth()) * Scrollbar::minFractionToStepWhenPaging(), static_cast<float>(m_scrollableArea->visibleWidth() - Scrollbar::maxOverlapBetweenPages())), 1.0f);
                if (negative)
                    deltaX = -deltaX;
            }
            scroll(HorizontalScrollbar, granularity, horizontalScrollbar->pixelStep(), -deltaX);
        }
    }
    return handled;
}