void YGNode::setPosition(
const YGDirection direction,
const float mainSize,
const float crossSize,
const float parentWidth) {
/* Root nodes should be always layouted as LTR, so we don't return negative
* values. */
const YGDirection directionRespectingRoot =
parent_ != nullptr ? direction : YGDirectionLTR;
const YGFlexDirection mainAxis =
YGResolveFlexDirection(style_.flexDirection, directionRespectingRoot);
const YGFlexDirection crossAxis =
YGFlexDirectionCross(mainAxis, directionRespectingRoot);
const float relativePositionMain = relativePosition(mainAxis, mainSize);
const float relativePositionCross = relativePosition(crossAxis, crossSize);
setLayoutPosition(
getLeadingMargin(mainAxis, parentWidth) + relativePositionMain,
leading[mainAxis]);
setLayoutPosition(
getTrailingMargin(mainAxis, parentWidth) + relativePositionMain,
trailing[mainAxis]);
setLayoutPosition(
getLeadingMargin(crossAxis, parentWidth) + relativePositionCross,
leading[crossAxis]);
setLayoutPosition(
getTrailingMargin(crossAxis, parentWidth) + relativePositionCross,
trailing[crossAxis]);
}
void MToolBarLayoutPolicy::updateAllLayoutPositions()
{
if (!isActive())
return;
if (widgetCount() == 1) {
setLayoutPosition(0, M::DefaultPosition);
} else if (widgetCount() > 1) {
bool leftToRight = layout()->layoutDirection() == Qt::LeftToRight;
setLayoutPosition(0, leftToRight ? M::HorizontalLeftPosition : M::HorizontalRightPosition);
setLayoutPosition(widgetCount()-1, leftToRight ? M::HorizontalRightPosition : M::HorizontalLeftPosition);
for (int i = 1; i < widgetCount()-1; ++i) {
setLayoutPosition(i, M::HorizontalCenterPosition);
}
}
}
void MToolBarLayoutPolicy::updateLayoutPositionDueToInsert(int widgetIndex)
{
if (!isActive())
return;
if (widgetCount() <= 3)
updateAllLayoutPositions();
else {
bool leftToRight = layout()->layoutDirection() == Qt::LeftToRight;
if (widgetIndex == 0) { // Added to first position
setLayoutPosition(0, leftToRight ? M::HorizontalLeftPosition : M::HorizontalRightPosition);
setLayoutPosition(1, M::HorizontalCenterPosition);
} else if (widgetIndex == widgetCount() - 1) { // Added to last position
setLayoutPosition(widgetCount()-2, M::HorizontalCenterPosition);
setLayoutPosition(widgetCount()-1, leftToRight ? M::HorizontalRightPosition : M::HorizontalLeftPosition);
} else // Added to middle
setLayoutPosition(widgetIndex, M::HorizontalCenterPosition);
}
}
void MToolBarLayoutPolicy::updateLayoutPositionDueToRemove(int widgetIndex)
{
if (!isActive())
return;
setLayoutPosition(widgetIndex, M::DefaultPosition);
if (widgetCount()-1 > 0) {
if (widgetCount()-1 == 1) {
// Only one will be left
setLayoutPosition((widgetIndex == 0) ? 1 : 0, M::DefaultPosition);
} else {
bool leftToRight = layout()->layoutDirection() == Qt::LeftToRight;
if (widgetIndex == 0)
// Second is the new number one
setLayoutPosition(1, leftToRight ? M::HorizontalLeftPosition : M::HorizontalRightPosition);
else if (widgetIndex == widgetCount()-1)
// Second but last will be last
setLayoutPosition(widgetCount()-2, leftToRight ? M::HorizontalRightPosition : M::HorizontalLeftPosition);
}
}
}
