PlatformWheelEventGtk.cpp [plain text]
#include "config.h"
#include "PlatformWheelEvent.h"
#include "FloatPoint.h"
#include "GtkUtilities.h"
#include "PlatformKeyboardEvent.h"
#include "Scrollbar.h"
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <wtf/WallTime.h>
namespace WebCore {
PlatformWheelEvent::PlatformWheelEvent(GdkEventScroll* event)
{
static const float delta = 1;
GdkModifierType state;
m_type = PlatformEvent::Wheel;
m_timestamp = wallTimeForEvent(event);
gdk_event_get_state(reinterpret_cast<GdkEvent*>(event), &state);
if (state & GDK_SHIFT_MASK)
m_modifiers.add(Modifier::ShiftKey);
if (state & GDK_CONTROL_MASK)
m_modifiers.add(Modifier::ControlKey);
if (state & GDK_MOD1_MASK)
m_modifiers.add(Modifier::AltKey);
if (state & GDK_META_MASK)
m_modifiers.add(Modifier::MetaKey);
if (PlatformKeyboardEvent::modifiersContainCapsLock(state))
m_modifiers.add(PlatformEvent::Modifier::CapsLockKey);
m_deltaX = 0;
m_deltaY = 0;
GdkScrollDirection direction;
if (!gdk_event_get_scroll_direction(reinterpret_cast<GdkEvent*>(event), &direction)) {
direction = GDK_SCROLL_SMOOTH;
gdouble deltaX, deltaY;
if (gdk_event_get_scroll_deltas(reinterpret_cast<GdkEvent*>(event), &deltaX, &deltaY)) {
m_deltaX = -deltaX;
m_deltaY = -deltaY;
}
}
if (!m_deltaX && !m_deltaY) {
switch (direction) {
case GDK_SCROLL_UP:
m_deltaY = delta;
break;
case GDK_SCROLL_DOWN:
m_deltaY = -delta;
break;
case GDK_SCROLL_LEFT:
m_deltaX = delta;
break;
case GDK_SCROLL_RIGHT:
m_deltaX = -delta;
break;
case GDK_SCROLL_SMOOTH:
break;
default:
ASSERT_NOT_REACHED();
}
}
m_wheelTicksX = m_deltaX;
m_wheelTicksY = m_deltaY;
#if ENABLE(KINETIC_SCROLLING)
m_phase = gdk_event_is_scroll_stop_event(reinterpret_cast<GdkEvent*>(event)) ?
PlatformWheelEventPhaseEnded :
PlatformWheelEventPhaseChanged;
#endif // ENABLE(KINETIC_SCROLLING)
gdouble x, y, rootX, rootY;
gdk_event_get_coords(reinterpret_cast<GdkEvent*>(event), &x, &y);
gdk_event_get_root_coords(reinterpret_cast<GdkEvent*>(event), &rootX, &rootY);
m_position = IntPoint(static_cast<int>(x), static_cast<int>(y));
m_globalPosition = IntPoint(static_cast<int>(rootX), static_cast<int>(rootY));
m_granularity = ScrollByPixelWheelEvent;
m_directionInvertedFromDevice = false;
m_deltaX *= static_cast<float>(Scrollbar::pixelsPerLineStep());
m_deltaY *= static_cast<float>(Scrollbar::pixelsPerLineStep());
}
}