void EventTargetNode::dispatchWheelEvent(PlatformWheelEvent& e)
{
ASSERT(!eventDispatchForbidden());
if (e.deltaX() == 0 && e.deltaY() == 0)
return;
FrameView* view = document()->view();
if (!view)
return;
IntPoint pos = view->windowToContents(e.pos());
// Convert the deltas from pixels to lines if we have a pixel scroll event.
float deltaX = e.deltaX();
float deltaY = e.deltaY();
// FIXME: Should we do anything with a ScrollByPageWheelEvent here?
// It will be treated like a line scroll of 1 right now.
if (e.granularity() == ScrollByPixelWheelEvent) {
deltaX /= cMouseWheelPixelsPerLineStep;
deltaY /= cMouseWheelPixelsPerLineStep;
}
RefPtr<WheelEvent> we = WheelEvent::create(e.deltaX(), e.deltaY(),
document()->defaultView(), e.globalX(), e.globalY(), pos.x(), pos.y(),
e.ctrlKey(), e.altKey(), e.shiftKey(), e.metaKey());
ExceptionCode ec = 0;
if (!dispatchEvent(we.release(), ec))
e.accept();
}
void ScrollAnimator::handleWheelEvent(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;
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)) {
e.accept();
if (e.granularity() == ScrollByPageWheelEvent) {
ASSERT(!e.deltaX());
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;
}
if (deltaY)
scroll(VerticalScrollbar, ScrollByPixel, verticalScrollbar->pixelStep(), -deltaY);
if (deltaX)
scroll(HorizontalScrollbar, ScrollByPixel, horizontalScrollbar->pixelStep(), -deltaX);
}
}
void ScrollView::wheelEvent(PlatformWheelEvent& e)
{
// We don't allow mouse wheeling to happen in a ScrollView that has had its scrollbars explicitly disabled.
#if PLATFORM(WX)
if (!canHaveScrollbars()) {
#else
if (!canHaveScrollbars() || platformWidget()) {
#endif
return;
}
// Accept the event if we have a scrollbar in that direction and can still
// scroll any further.
float deltaX = m_horizontalScrollbar ? e.deltaX() : 0;
float deltaY = m_verticalScrollbar ? e.deltaY() : 0;
IntSize maxForwardScrollDelta = maximumScrollPosition() - scrollPosition();
IntSize maxBackwardScrollDelta = scrollPosition() - minimumScrollPosition();
if ((deltaX < 0 && maxForwardScrollDelta.width() > 0)
|| (deltaX > 0 && maxBackwardScrollDelta.width() >0)
|| (deltaY < 0 && maxForwardScrollDelta.height() > 0)
|| (deltaY > 0 && maxBackwardScrollDelta.height() > 0)) {
e.accept();
if (e.granularity() == ScrollByPageWheelEvent) {
ASSERT(!e.deltaX());
bool negative = deltaY < 0;
deltaY = max(max(static_cast<float>(visibleHeight()) * Scrollbar::minFractionToStepWhenPaging(), static_cast<float>(visibleHeight() - Scrollbar::maxOverlapBetweenPages())), 1.0f);
if (negative)
deltaY = -deltaY;
}
if (deltaY)
m_verticalScrollbar->scroll(ScrollUp, ScrollByPixel, deltaY);
if (deltaX)
m_horizontalScrollbar->scroll(ScrollLeft, ScrollByPixel, deltaX);
}
}
void ScrollView::setFrameRect(const IntRect& newRect)
{
IntRect oldRect = frameRect();
if (newRect == oldRect)
return;
Widget::setFrameRect(newRect);
if (platformWidget())
return;
if (newRect.width() != oldRect.width() || newRect.height() != oldRect.height()) {
updateScrollbars(m_scrollOffset);
if (!m_useFixedLayout)
contentsResized();
}
frameRectsChanged();
}
void ScrollView::wheelEvent(PlatformWheelEvent& e)
{
// We don't allow mouse wheeling to happen in a ScrollView that has had its scrollbars explicitly disabled.
#if PLATFORM(WX)
if (!canHaveScrollbars()) {
#else
if (!canHaveScrollbars() || platformWidget()) {
#endif
return;
}
// Determine how much we want to scroll. If we can move at all, we will accept the event.
IntSize maxScrollDelta = maximumScrollPosition() - scrollPosition();
if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) ||
(e.deltaX() > 0 && scrollOffset().width() > 0) ||
(e.deltaY() < 0 && maxScrollDelta.height() > 0) ||
(e.deltaY() > 0 && scrollOffset().height() > 0)) {
e.accept();
float deltaX = e.deltaX();
float deltaY = e.deltaY();
if (e.granularity() == ScrollByPageWheelEvent) {
ASSERT(deltaX == 0);
bool negative = deltaY < 0;
deltaY = max(max(static_cast<float>(visibleHeight()) * Scrollbar::minFractionToStepWhenPaging(), static_cast<float>(visibleHeight() - Scrollbar::maxOverlapBetweenPages())), 1.0f);
if (negative)
deltaY = -deltaY;
}
// Should we fall back on scrollBy() if there is no scrollbar for a non-zero delta?
if (deltaY && m_verticalScrollbar)
m_verticalScrollbar->scroll(ScrollUp, ScrollByPixel, deltaY);
if (deltaX && m_horizontalScrollbar)
m_horizontalScrollbar->scroll(ScrollLeft, ScrollByPixel, deltaX);
}
}
void ScrollView::setFrameRect(const IntRect& newRect)
{
IntRect oldRect = frameRect();
if (newRect == oldRect)
return;
Widget::setFrameRect(newRect);
if (platformWidget())
return;
if (newRect.width() != oldRect.width() || newRect.height() != oldRect.height()) {
updateScrollbars(m_scrollOffset);
if (!m_useFixedLayout)
contentsResized();
}
frameRectsChanged();
}
void ScrollView::wheelEvent(PlatformWheelEvent& e)
{
// Determine how much we want to scroll. If we can move at all, we will accept the event.
IntSize maxScrollDelta = maximumScroll();
if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) ||
(e.deltaX() > 0 && scrollOffset().width() > 0) ||
(e.deltaY() < 0 && maxScrollDelta.height() > 0) ||
(e.deltaY() > 0 && scrollOffset().height() > 0)) {
e.accept();
scrollBy(-e.deltaX() * LINE_STEP, -e.deltaY() * LINE_STEP);
}
}
void ScrollView::wheelEvent(PlatformWheelEvent& e)
{
// We don't allow mouse wheeling to happen in a ScrollView that has had its scrollbars explicitly disabled.
#if PLATFORM(WX)
if (!canHaveScrollbars()) {
#else
if (!canHaveScrollbars() || platformWidget()) {
#endif
return;
}
// Determine how much we want to scroll. If we can move at all, we will accept the event.
IntSize maxScrollDelta = maximumScrollPosition() - scrollPosition();
if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) ||
(e.deltaX() > 0 && scrollOffset().width() > 0) ||
(e.deltaY() < 0 && maxScrollDelta.height() > 0) ||
(e.deltaY() > 0 && scrollOffset().height() > 0)) {
e.accept();
float deltaX = e.deltaX();
float deltaY = e.deltaY();
if (e.granularity() == ScrollByPageWheelEvent) {
ASSERT(deltaX == 0);
bool negative = deltaY < 0;
deltaY = max(max<int>(visibleHeight() * Scrollbar::minFractionToStepWhenPaging(), visibleHeight() - Scrollbar::maxOverlapBetweenPages()), 1);
if (negative)
deltaY = -deltaY;
}
scrollBy(IntSize(-deltaX, -deltaY));
}
}
void ScrollView::setFrameRect(const IntRect& newRect)
{
IntRect oldRect = frameRect();
if (newRect == oldRect)
return;
Widget::setFrameRect(newRect);
if (platformWidget())
return;
if (newRect.width() != oldRect.width() || newRect.height() != oldRect.height()) {
updateScrollbars(m_scrollOffset);
contentsResized();
}
frameRectsChanged();
}
void EventDispatcher::dispatchWheelEvent(Node* node, PlatformWheelEvent& event)
{
ASSERT(!eventDispatchForbidden());
if (!(event.deltaX() || event.deltaY()))
return;
EventDispatcher dispatcher(node);
RefPtr<WheelEvent> wheelEvent = WheelEvent::create(event.wheelTicksX(), event.wheelTicksY(), event.deltaX(), event.deltaY(), granularity(event),
node->document()->defaultView(), event.globalX(), event.globalY(), event.x(), event.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey());
if (!dispatcher.dispatchEvent(wheelEvent) || wheelEvent->defaultHandled())
event.accept();
}
void EventTargetNode::dispatchWheelEvent(PlatformWheelEvent& e)
{
ASSERT(!eventDispatchForbidden());
if (e.deltaX() == 0 && e.deltaY() == 0)
return;
FrameView* view = document()->view();
if (!view)
return;
IntPoint pos = view->windowToContents(e.pos());
RefPtr<WheelEvent> we = WheelEvent::create(e.deltaX(), e.deltaY(),
document()->defaultView(), e.globalX(), e.globalY(), pos.x(), pos.y(),
e.ctrlKey(), e.altKey(), e.shiftKey(), e.metaKey());
ExceptionCode ec = 0;
if (!dispatchEvent(we.release(), ec, true))
e.accept();
}
void EventTargetNode::dispatchWheelEvent(PlatformWheelEvent& e)
{
assert(!eventDispatchForbidden());
if (e.delta() == 0)
return;
FrameView* view = document()->view();
if (!view)
return;
IntPoint pos = view->viewportToContents(e.pos());
RefPtr<WheelEvent> we = new WheelEvent(e.isHorizontal(), e.delta(),
document()->defaultView(), e.globalX(), e.globalY(), pos.x(), pos.y(),
e.ctrlKey(), e.altKey(), e.shiftKey(), e.metaKey());
ExceptionCode ec = 0;
if (!dispatchEvent(we, ec, true))
e.accept();
}