void UIAnchorLayout::updateWidget(const UIWidgetPtr& widget, UIAnchorGroup& anchorGroup)
{
UIWidgetPtr parentWidget = getParentWidget();
if(!parentWidget)
return;
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);
}
}
// determine hooked widget edge point
Rect hookedWidgetRect = hookedWidget->getRect();
if(hookedWidget == parentWidget)
hookedWidgetRect = parentWidget->getChildrenRect();
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;
}
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;
}
}
widget->setRect(newRect);
anchorGroup.setUpdated(true);
}
