bool RS232Console::handleEvent(Dashboard *dash, SDL_Event *event)
{
int width, height, dummy;
getMetrics(dash, width, dummy, height);
bool hit_test = (event->button.x >= x) &&
(event->button.y >= y) &&
(event->button.x < x + width) &&
(event->button.y < y + height);
switch (event->type) {
case SDL_MOUSEBUTTONDOWN:
if (event->button.button == SDL_BUTTON_LEFT)
focused = hit_test;
break;
case SDL_MOUSEBUTTONUP:
if (!hit_test)
break;
if (event->button.button == SDL_BUTTON_WHEELDOWN) {
scroll_position = min(scroll_position + 2, maxScrollPosition());
scrollbar_persist_frames = SCROLLBAR_PERSIST_TIME_MSEC / Dashboard::FRAME_INTERVAL_MSEC;
} else if (event->button.button == SDL_BUTTON_WHEELUP) {
scroll_position = max(scroll_position - 2, 0);
scrollbar_persist_frames = SCROLLBAR_PERSIST_TIME_MSEC / Dashboard::FRAME_INTERVAL_MSEC;
}
break;
}
return false;
}
void RS232Console::onRS232Receive(uint8_t data)
{
bool at_bottom = (scroll_position == maxScrollPosition());
if (stored_text.size() == 0)
stored_text.push_back(string());
switch (data) {
case '\n':
stored_text.push_back(string());
break;
case '\r':
break;
default:
stored_text[stored_text.size() - 1].push_back((char)data);
break;
}
if (at_bottom)
scroll_position = maxScrollPosition();
}
void ScrollView::updateScrollbars(const IntSize& desiredOffset)
{
// Don't allow re-entrancy into this function.
if (m_data->m_inUpdateScrollbars)
return;
// FIXME: This code is here so we don't have to fork FrameView.h/.cpp.
// In the end, FrameView should just merge with ScrollView.
if (static_cast<const FrameView*>(this)->frame()->prohibitsScrolling())
return;
m_data->m_inUpdateScrollbars = true;
bool hasVerticalScrollbar = m_data->m_vBar;
bool hasHorizontalScrollbar = m_data->m_hBar;
bool oldHasVertical = hasVerticalScrollbar;
bool oldHasHorizontal = hasHorizontalScrollbar;
ScrollbarMode hScroll = m_data->m_hScrollbarMode;
ScrollbarMode vScroll = m_data->m_vScrollbarMode;
const int cVerticalWidth = PlatformScrollbar::verticalScrollbarWidth();
const int cHorizontalHeight = PlatformScrollbar::horizontalScrollbarHeight();
for (int pass = 0; pass < 2; pass++) {
bool scrollsVertically;
bool scrollsHorizontally;
if (!m_data->m_scrollbarsSuppressed && (hScroll == ScrollbarAuto || vScroll == ScrollbarAuto)) {
// Do a layout if pending before checking if scrollbars are needed.
if (hasVerticalScrollbar != oldHasVertical || hasHorizontalScrollbar != oldHasHorizontal)
static_cast<FrameView*>(this)->layout();
scrollsVertically = (vScroll == ScrollbarAlwaysOn) || (vScroll == ScrollbarAuto && contentsHeight() > height());
if (scrollsVertically)
scrollsHorizontally = (hScroll == ScrollbarAlwaysOn) || (hScroll == ScrollbarAuto && contentsWidth() + cVerticalWidth > width());
else {
scrollsHorizontally = (hScroll == ScrollbarAlwaysOn) || (hScroll == ScrollbarAuto && contentsWidth() > width());
if (scrollsHorizontally)
scrollsVertically = (vScroll == ScrollbarAlwaysOn) || (vScroll == ScrollbarAuto && contentsHeight() + cHorizontalHeight > height());
}
}
else {
scrollsHorizontally = (hScroll == ScrollbarAuto) ? hasHorizontalScrollbar : (hScroll == ScrollbarAlwaysOn);
scrollsVertically = (vScroll == ScrollbarAuto) ? hasVerticalScrollbar : (vScroll == ScrollbarAlwaysOn);
}
if (hasVerticalScrollbar != scrollsVertically) {
m_data->setHasVerticalScrollbar(scrollsVertically);
hasVerticalScrollbar = scrollsVertically;
}
if (hasHorizontalScrollbar != scrollsHorizontally) {
m_data->setHasHorizontalScrollbar(scrollsHorizontally);
hasHorizontalScrollbar = scrollsHorizontally;
}
}
// Set up the range (and page step/line step).
IntSize maxScrollPosition(contentsWidth() - visibleWidth(), contentsHeight() - visibleHeight());
IntSize scroll = desiredOffset.shrunkTo(maxScrollPosition);
scroll.clampNegativeToZero();
if (m_data->m_hBar) {
int clientWidth = visibleWidth();
m_data->m_hBar->setEnabled(contentsWidth() > clientWidth);
int pageStep = (clientWidth - PAGE_KEEP);
if (pageStep < 0) pageStep = clientWidth;
IntRect oldRect(m_data->m_hBar->frameGeometry());
IntRect hBarRect = IntRect(0,
height() - m_data->m_hBar->height(),
width() - (m_data->m_vBar ? m_data->m_vBar->width() : 0),
m_data->m_hBar->height());
m_data->m_hBar->setRect(hBarRect);
if (!m_data->m_scrollbarsSuppressed && oldRect != m_data->m_hBar->frameGeometry())
m_data->m_hBar->invalidate();
if (m_data->m_scrollbarsSuppressed)
m_data->m_hBar->setSuppressInvalidation(true);
m_data->m_hBar->setSteps(LINE_STEP, pageStep);
m_data->m_hBar->setProportion(clientWidth, contentsWidth());
m_data->m_hBar->setValue(scroll.width());
if (m_data->m_scrollbarsSuppressed)
m_data->m_hBar->setSuppressInvalidation(false);
}
if (m_data->m_vBar) {
int clientHeight = visibleHeight();
m_data->m_vBar->setEnabled(contentsHeight() > clientHeight);
int pageStep = (clientHeight - PAGE_KEEP);
if (pageStep < 0) pageStep = clientHeight;
IntRect oldRect(m_data->m_vBar->frameGeometry());
IntRect vBarRect = IntRect(width() - m_data->m_vBar->width(),
0,
m_data->m_vBar->width(),
height() - (m_data->m_hBar ? m_data->m_hBar->height() : 0));
m_data->m_vBar->setRect(vBarRect);
if (!m_data->m_scrollbarsSuppressed && oldRect != m_data->m_vBar->frameGeometry())
m_data->m_vBar->invalidate();
if (m_data->m_scrollbarsSuppressed)
m_data->m_vBar->setSuppressInvalidation(true);
m_data->m_vBar->setSteps(LINE_STEP, pageStep);
m_data->m_vBar->setProportion(clientHeight, contentsHeight());
m_data->m_vBar->setValue(scroll.height());
if (m_data->m_scrollbarsSuppressed)
m_data->m_vBar->setSuppressInvalidation(false);
}
if (oldHasVertical != (m_data->m_vBar != 0) || oldHasHorizontal != (m_data->m_hBar != 0))
geometryChanged();
// See if our offset has changed in a situation where we might not have scrollbars.
// This can happen when editing a body with overflow:hidden and scrolling to reveal selection.
// It can also happen when maximizing a window that has scrollbars (but the new maximized result
// does not).
IntSize scrollDelta = scroll - m_data->m_scrollOffset;
if (scrollDelta != IntSize()) {
m_data->m_scrollOffset = scroll;
m_data->scrollBackingStore(scrollDelta);
}
m_data->m_inUpdateScrollbars = false;
}