int UIAnchor::getHookedPoint(const UIWidgetPtr& hookedWidget, const UIWidgetPtr& parentWidget)
{
// determine hooked widget edge point
Rect hookedWidgetRect = hookedWidget->getRect();
if(hookedWidget == parentWidget)
hookedWidgetRect = parentWidget->getPaddingRect();
int point = 0;
switch(m_hookedEdge) {
case Fw::AnchorLeft:
point = hookedWidgetRect.left();
break;
case Fw::AnchorRight:
point = hookedWidgetRect.right();
break;
case Fw::AnchorTop:
point = hookedWidgetRect.top();
break;
case Fw::AnchorBottom:
point = hookedWidgetRect.bottom();
break;
case Fw::AnchorHorizontalCenter:
point = hookedWidgetRect.horizontalCenter();
break;
case Fw::AnchorVerticalCenter:
point = hookedWidgetRect.verticalCenter();
break;
default:
// must never happens
assert(false);
break;
}
if(hookedWidget == parentWidget) {
switch(m_hookedEdge) {
case Fw::AnchorLeft:
case Fw::AnchorRight:
case Fw::AnchorHorizontalCenter:
point -= parentWidget->getVirtualOffset().x;
break;
case Fw::AnchorBottom:
case Fw::AnchorTop:
case Fw::AnchorVerticalCenter:
point -= parentWidget->getVirtualOffset().y;
break;
default:
break;
}
}
return point;
}
bool UIHorizontalLayout::internalUpdate()
{
UIWidgetPtr parentWidget = getParentWidget();
if(!parentWidget)
return false;
UIWidgetList widgets = parentWidget->getChildren();
if(m_alignRight)
std::reverse(widgets.begin(), widgets.end());
bool changed = false;
Rect paddingRect = parentWidget->getPaddingRect();
Point pos = (m_alignRight) ? paddingRect.topRight() : paddingRect.topLeft();
int preferredWidth = 0;
int gap;
for(const UIWidgetPtr& widget : widgets) {
if(!widget->isExplicitlyVisible())
continue;
Size size = widget->getSize();
gap = (m_alignRight) ? -(widget->getMarginRight()+widget->getWidth()) : widget->getMarginLeft();
pos.x += gap;
preferredWidth += gap;
if(widget->isFixedSize()) {
if(widget->getTextAlign() & Fw::AlignTop) {
pos.y = paddingRect.top() + widget->getMarginTop();
} else if(widget->getTextAlign() & Fw::AlignBottom) {
pos.y = paddingRect.bottom() - widget->getHeight() - widget->getMarginBottom();
pos.y = std::max<int>(pos.y, paddingRect.top());
} else { // center it
pos.y = paddingRect.top() + (paddingRect.height() - (widget->getMarginTop() + widget->getHeight() + widget->getMarginBottom()))/2;
pos.y = std::max<int>(pos.y, paddingRect.top());
}
} else {
// expand height
size.setHeight(paddingRect.height() - (widget->getMarginTop() + widget->getMarginBottom()));
pos.y = paddingRect.top() + (paddingRect.height() - size.height())/2;
}
if(widget->setRect(Rect(pos - parentWidget->getVirtualOffset(), size)))
changed = true;
gap = (m_alignRight) ? -widget->getMarginLeft() : (widget->getWidth() + widget->getMarginRight());
gap += m_spacing;
pos.x += gap;
preferredWidth += gap;
}
preferredWidth -= m_spacing;
preferredWidth += parentWidget->getPaddingLeft() + parentWidget->getPaddingRight();
if(m_fitChildren && preferredWidth != parentWidget->getWidth()) {
// must set the preferred width later
g_dispatcher.addEvent([=] {
parentWidget->setWidth(preferredWidth);
});
}
return changed;
}
bool UIAnchorLayout::updateWidget(const UIWidgetPtr& widget, UIAnchorGroup& anchorGroup, UIWidgetPtr first)
{
UIWidgetPtr parentWidget = getParentWidget();
if(!parentWidget)
return false;
if(first == widget) {
g_logger.error(stdext::format("child '%s' of parent widget '%s' is recursively anchored to itself, please fix this", widget->getId(), parentWidget->getId()));
return false;
}
if(!first)
first = widget;
Rect newRect = widget->getRect();
bool verticalMoved = false;
bool horizontalMoved = false;
// calculates new rect based on anchors
for(const UIAnchor& anchor : anchorGroup.getAnchors()) {
// skip invalid anchors
if(anchor.getHookedEdge() == Fw::AnchorNone)
continue;
// determine hooked widget
UIWidgetPtr hookedWidget;
if(parentWidget) {
if(anchor.getHookedWidgetId() == "parent")
hookedWidget = parentWidget;
else if(anchor.getHookedWidgetId() == "next")
hookedWidget = parentWidget->getChildAfter(widget);
else if(anchor.getHookedWidgetId() == "prev")
hookedWidget = parentWidget->getChildBefore(widget);
else
hookedWidget = parentWidget->getChildById(anchor.getHookedWidgetId());
}
// skip invalid anchors
if(!hookedWidget)
continue;
if(hookedWidget != getParentWidget()) {
// update this hooked widget anchors
auto it = m_anchorsGroups.find(hookedWidget);
if(it != m_anchorsGroups.end()) {
UIAnchorGroup& hookedAnchorGroup = it->second;
if(!hookedAnchorGroup.isUpdated())
updateWidget(hookedWidget, hookedAnchorGroup, first);
}
}
// determine hooked widget edge point
Rect hookedWidgetRect = hookedWidget->getRect();
if(hookedWidget == parentWidget)
hookedWidgetRect = parentWidget->getPaddingRect();
int point = 0;
switch(anchor.getHookedEdge()) {
case Fw::AnchorLeft:
point = hookedWidgetRect.left();
break;
case Fw::AnchorRight:
point = hookedWidgetRect.right();
break;
case Fw::AnchorTop:
point = hookedWidgetRect.top();
break;
case Fw::AnchorBottom:
point = hookedWidgetRect.bottom();
break;
case Fw::AnchorHorizontalCenter:
point = hookedWidgetRect.horizontalCenter();
break;
case Fw::AnchorVerticalCenter:
point = hookedWidgetRect.verticalCenter();
break;
default:
// must never happens
assert(false);
break;
}
if(hookedWidget == parentWidget) {
switch(anchor.getHookedEdge()) {
case Fw::AnchorLeft:
case Fw::AnchorRight:
case Fw::AnchorHorizontalCenter:
point -= parentWidget->getVirtualOffset().x;
break;
case Fw::AnchorBottom:
case Fw::AnchorTop:
case Fw::AnchorVerticalCenter:
point -= parentWidget->getVirtualOffset().y;
break;
default:
break;
}
}
switch(anchor.getAnchoredEdge()) {
case Fw::AnchorHorizontalCenter:
newRect.moveHorizontalCenter(point + widget->getMarginLeft() - widget->getMarginRight());
horizontalMoved = true;
break;
case Fw::AnchorLeft:
if(!horizontalMoved) {
newRect.moveLeft(point + widget->getMarginLeft());
horizontalMoved = true;
} else
newRect.setLeft(point + widget->getMarginLeft());
break;
case Fw::AnchorRight:
if(!horizontalMoved) {
newRect.moveRight(point - widget->getMarginRight());
horizontalMoved = true;
} else
newRect.setRight(point - widget->getMarginRight());
break;
case Fw::AnchorVerticalCenter:
newRect.moveVerticalCenter(point + widget->getMarginTop() - widget->getMarginBottom());
verticalMoved = true;
break;
case Fw::AnchorTop:
if(!verticalMoved) {
newRect.moveTop(point + widget->getMarginTop());
verticalMoved = true;
} else
newRect.setTop(point + widget->getMarginTop());
break;
case Fw::AnchorBottom:
if(!verticalMoved) {
newRect.moveBottom(point - widget->getMarginBottom());
verticalMoved = true;
} else
newRect.setBottom(point - widget->getMarginBottom());
break;
default:
break;
}
}
bool changed = false;
if(widget->setRect(newRect))
changed = true;
anchorGroup.setUpdated(true);
return changed;
}
