bool AxisY::CanScrollTo(Side aSide) const
{
switch (aSide) {
case eSideTop:
return CanScroll(-COORDINATE_EPSILON * 2);
case eSideBottom:
return CanScroll(COORDINATE_EPSILON * 2);
default:
MOZ_ASSERT_UNREACHABLE("aSide is out of valid values");
return false;
}
}
void Axis::OverscrollBy(ParentLayerCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
StopSamplingOverscrollAnimation();
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetCompositionEnd().value, GetPageEnd().value)) {
nsPrintfCString message("composition end (%f) is not equal (within error) to page end (%f)\n",
GetCompositionEnd().value, GetPageEnd().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetOrigin().value, GetPageStart().value)) {
nsPrintfCString message("composition origin (%f) is not equal (within error) to page origin (%f)\n",
GetOrigin().value, GetPageStart().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}
void Axis::OverscrollBy(ParentLayerCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
// We can get some spurious calls to OverscrollBy() with near-zero values
// due to rounding error. Ignore those (they might trip the asserts below.)
if (FuzzyEqualsAdditive(aOverscroll.value, 0.0f, COORDINATE_EPSILON)) {
return;
}
EndOverscrollAnimation();
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetCompositionEnd().value, GetPageEnd().value)) {
nsPrintfCString message("composition end (%f) is not equal (within error) to page end (%f)\n",
GetCompositionEnd().value, GetPageEnd().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH("GFX: Overscroll issue > 0");
}
#endif
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetOrigin().value, GetPageStart().value)) {
nsPrintfCString message("composition origin (%f) is not equal (within error) to page origin (%f)\n",
GetOrigin().value, GetPageStart().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH("GFX: Overscroll issue < 0");
}
#endif
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}
void Axis::OverscrollBy(CSSCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
#ifdef DEBUG
if (!FuzzyEqualsAdditive(GetCompositionEnd().value, GetPageEnd().value, COORDINATE_EPSILON)) {
nsPrintfCString message("composition end (%f) is not within COORDINATE_EPISLON of page end (%f)\n",
GetCompositionEnd().value, GetPageEnd().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
#ifdef DEBUG
if (!FuzzyEqualsAdditive(GetOrigin().value, GetPageStart().value, COORDINATE_EPSILON)) {
nsPrintfCString message("composition origin (%f) is not within COORDINATE_EPISLON of page origin (%f)\n",
GetOrigin().value, GetPageStart().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}
bool Axis::CanScroll(ParentLayerCoord aDelta) const
{
if (!CanScroll() || mAxisLocked) {
return false;
}
return fabs(DisplacementWillOverscrollAmount(aDelta) - aDelta) > COORDINATE_EPSILON;
}
bool Axis::CanScroll(ParentLayerCoord aDelta) const
{
if (!CanScroll() || mAxisLocked) {
return false;
}
return DisplacementWillOverscrollAmount(aDelta) != aDelta;
}
bool Axis::CanScroll(double aDelta) const
{
if (!CanScroll() || mAxisLocked) {
return false;
}
ParentLayerCoord delta = aDelta;
return DisplacementWillOverscrollAmount(delta) != delta;
}
void Axis::OverscrollBy(CSSCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
MOZ_ASSERT(FuzzyEqualsAdditive(GetCompositionEnd().value, GetPageEnd().value, COORDINATE_EPSILON));
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
MOZ_ASSERT(FuzzyEqualsAdditive(GetOrigin().value, GetPageStart().value, COORDINATE_EPSILON));
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}
/* Returns a scrollbar for the given orientation, or NULL if the scrollbar
* has not been previously created and create is false */
wxScrollBar *wxWindowQt::QtGetScrollBar( int orientation ) const
{
wxCHECK_MSG( CanScroll( orientation ), NULL, "Window can't scroll in that orientation" );
wxScrollBar *scrollBar = NULL;
if ( orientation == wxHORIZONTAL )
scrollBar = m_horzScrollBar;
else
scrollBar = m_vertScrollBar;
return scrollBar;
}
void wxWindowQt::SetScrollbar( int orientation, int pos, int thumbvisible, int range, bool refresh )
{
wxCHECK_RET( CanScroll( orientation ), "Window can't scroll in that orientation" );
//If not exist, create the scrollbar
wxScrollBar *scrollBar = QtGetScrollBar( orientation );
if ( scrollBar == NULL )
scrollBar = QtSetScrollBar( orientation );
// Configure the scrollbar if it exists. If range is zero we can get here with
// scrollBar == NULL and it is not a problem
if ( scrollBar )
{
scrollBar->SetScrollbar( pos, thumbvisible, range, thumbvisible, refresh );
if ( HasFlag( wxALWAYS_SHOW_SB ) && ( range == 0 ) )
{
// Disable instead of hide
scrollBar->GetHandle()->show();
scrollBar->GetHandle()->setEnabled( false );
}
else
scrollBar->GetHandle()->setEnabled( true );
}
}
bool Axis::CanScrollNow() const {
return !mAxisLocked && CanScroll();
}