void UIWidget::removeChild(UIWidgetPtr child)
{
// remove from children list
if(hasChild(child)) {
// defocus if needed
bool focusAnother = false;
if(m_focusedChild == child) {
focusChild(nullptr, Fw::ActiveFocusReason);
focusAnother = true;
}
if(isChildLocked(child))
unlockChild(child);
auto it = std::find(m_children.begin(), m_children.end(), child);
m_children.erase(it);
// reset child parent
assert(child->getParent() == static_self_cast<UIWidget>());
child->setParent(nullptr);
m_layout->removeWidget(child);
// update child states
child->updateStates();
updateChildrenIndexStates();
if(m_autoFocusPolicy != Fw::AutoFocusNone && focusAnother && !m_focusedChild)
focusPreviousChild(Fw::ActiveFocusReason, true);
g_ui.onWidgetDisappear(child);
} else
g_logger.traceError("attempt to remove an unknown child from a UIWidget");
}
void UIWidget::removeChild(const UIWidgetPtr& child)
{
// remove from children list
if(hasChild(child)) {
// defocus if needed
bool focusAnother = false;
if(m_focusedChild == child) {
focusChild(nullptr, Fw::ActiveFocusReason);
focusAnother = true;
}
if(isChildLocked(child))
unlockChild(child);
auto it = std::find(m_children.begin(), m_children.end(), child);
m_children.erase(it);
// reset child parent
assert(child->getParent() == asUIWidget());
child->setParent(nullptr);
m_layout->removeWidget(child);
// update child states
child->updateStates();
updateChildrenIndexStates();
if(focusAnother && !m_focusedChild)
focusPreviousChild(Fw::ActiveFocusReason);
} else
logError("Attempt to remove an unknown child from a UIWidget");
}
void UIWidget::updateState(Fw::WidgetState state)
{
if(m_destroyed)
return;
bool newStatus = true;
bool oldStatus = hasState(state);
bool updateChildren = false;
switch(state) {
case Fw::ActiveState: {
UIWidgetPtr widget = static_self_cast<UIWidget>();
UIWidgetPtr parent;
do {
parent = widget->getParent();
if(!widget->isExplicitlyEnabled() ||
((parent && parent->getFocusedChild() != widget))) {
newStatus = false;
break;
}
} while((widget = parent));
updateChildren = newStatus != oldStatus;
break;
}
case Fw::FocusState: {
newStatus = (getParent() && getParent()->getFocusedChild() == static_self_cast<UIWidget>());
break;
}
case Fw::HoverState: {
newStatus = (g_ui.getHoveredWidget() == static_self_cast<UIWidget>() && isEnabled());
break;
}
case Fw::PressedState: {
newStatus = (g_ui.getPressedWidget() == static_self_cast<UIWidget>());
break;
}
case Fw::DraggingState: {
newStatus = (g_ui.getDraggingWidget() == static_self_cast<UIWidget>());
break;
}
case Fw::DisabledState: {
bool enabled = true;
UIWidgetPtr widget = static_self_cast<UIWidget>();
do {
if(!widget->isExplicitlyEnabled()) {
enabled = false;
break;
}
} while((widget = widget->getParent()));
newStatus = !enabled;
updateChildren = newStatus != oldStatus;
break;
}
case Fw::FirstState: {
newStatus = (getParent() && getParent()->getFirstChild() == static_self_cast<UIWidget>());
break;
}
case Fw::MiddleState: {
newStatus = (getParent() && getParent()->getFirstChild() != static_self_cast<UIWidget>() && getParent()->getLastChild() != static_self_cast<UIWidget>());
break;
}
case Fw::LastState: {
newStatus = (getParent() && getParent()->getLastChild() == static_self_cast<UIWidget>());
break;
}
case Fw::AlternateState: {
newStatus = (getParent() && (getParent()->getChildIndex(static_self_cast<UIWidget>()) % 2) == 1);
break;
}
case Fw::HiddenState: {
bool visible = true;
UIWidgetPtr widget = static_self_cast<UIWidget>();
do {
if(!widget->isExplicitlyVisible()) {
visible = false;
break;
}
} while((widget = widget->getParent()));
newStatus = !visible;
updateChildren = newStatus != oldStatus;
break;
}
default:
return;
}
if(updateChildren) {
// do a backup of children list, because it may change while looping it
UIWidgetList children = m_children;
for(const UIWidgetPtr& child : children)
child->updateState(state);
}
if(setState(state, newStatus)) {
// disabled widgets cannot have hover state
if(state == Fw::DisabledState && !newStatus && isHovered()) {
g_ui.updateHoveredWidget();
} else if(state == Fw::HiddenState) {
onVisibilityChange(!newStatus);
}
}
}
void UIWidget::updateState(Fw::WidgetState state)
{
bool newStatus = true;
bool oldStatus = hasState(state);
bool updateChildren = false;
switch(state) {
case Fw::ActiveState: {
UIWidgetPtr widget = asUIWidget();
UIWidgetPtr parent;
do {
parent = widget->getParent();
if(!widget->isExplicitlyEnabled() ||
((parent && parent->getFocusedChild() != widget))) {
newStatus = false;
break;
}
} while(widget = parent);
updateChildren = true;
break;
}
case Fw::FocusState: {
newStatus = (getParent() && getParent()->getFocusedChild() == asUIWidget());
break;
}
case Fw::HoverState: {
updateChildren = true;
Point mousePos = g_window.getMousePos();
UIWidgetPtr widget = asUIWidget();
UIWidgetPtr parent;
do {
parent = widget->getParent();
if(!widget->isExplicitlyEnabled() || !widget->isExplicitlyVisible() || !widget->containsPoint(mousePos) ||
(parent && widget != parent->getChildByPos(mousePos))) {
newStatus = false;
break;
}
} while(widget = parent);
break;
}
case Fw::PressedState: {
newStatus = m_pressed;
break;
}
case Fw::DisabledState: {
bool enabled = true;
updateChildren = true;
UIWidgetPtr widget = asUIWidget();
do {
if(!widget->isExplicitlyEnabled()) {
enabled = false;
break;
}
} while(widget = widget->getParent());
newStatus = !enabled;
break;
}
case Fw::FirstState: {
newStatus = (getParent() && getParent()->getFirstChild() == asUIWidget());
break;
}
case Fw::MiddleState: {
newStatus = (getParent() && getParent()->getFirstChild() != asUIWidget() && getParent()->getLastChild() != asUIWidget());
break;
}
case Fw::LastState: {
newStatus = (getParent() && getParent()->getLastChild() == asUIWidget());
break;
}
case Fw::AlternateState: {
newStatus = (getParent() && (getParent()->getChildIndex(asUIWidget()) % 2) == 1);
break;
}
default:
return;
}
if(updateChildren) {
// do a backup of children list, because it may change while looping it
UIWidgetList children = m_children;
for(const UIWidgetPtr& child : children)
child->updateState(state);
}
if(setState(state, newStatus)) {
if(state == Fw::FocusState) {
g_dispatcher.addEvent(std::bind(&UIWidget::onFocusChange, asUIWidget(), newStatus, m_lastFocusReason));
} else if(state == Fw::HoverState)
g_dispatcher.addEvent(std::bind(&UIWidget::onHoverChange, asUIWidget(), newStatus));
}
}
