void UIWidget::lockChild(const UIWidgetPtr& child)
{
if(!child)
return;
assert(hasChild(child));
// prevent double locks
if(isChildLocked(child))
unlockChild(child);
// disable all other children
for(const UIWidgetPtr& otherChild : m_children) {
if(otherChild == child)
child->setEnabled(true);
else
otherChild->setEnabled(false);
}
m_lockedChildren.push_front(child);
// lock child focus
if(child->isFocusable())
focusChild(child, Fw::ActiveFocusReason);
moveChildToTop(child);
}
void UIWidget::lockChild(const UIWidgetPtr& child)
{
if(m_destroyed)
return;
if(!child)
return;
if(!hasChild(child)) {
g_logger.traceError("cannot find child");
return;
}
// prevent double locks
if(isChildLocked(child))
unlockChild(child);
// disable all other children
for(const UIWidgetPtr& otherChild : m_children) {
if(otherChild == child)
child->setEnabled(true);
else
otherChild->setEnabled(false);
}
m_lockedChildren.push_front(child);
// lock child focus
if(child->isFocusable())
focusChild(child, Fw::ActiveFocusReason);
}
void UIWidget::unlockChild(const UIWidgetPtr& child)
{
if(m_destroyed)
return;
if(!child)
return;
if(!hasChild(child)) {
g_logger.traceError("cannot find child");
return;
}
auto it = std::find(m_lockedChildren.begin(), m_lockedChildren.end(), child);
if(it == m_lockedChildren.end())
return;
m_lockedChildren.erase(it);
// find new child to lock
UIWidgetPtr lockedChild;
if(m_lockedChildren.size() > 0) {
lockedChild = m_lockedChildren.front();
assert(hasChild(lockedChild));
}
for(const UIWidgetPtr& otherChild : m_children) {
// lock new child
if(lockedChild) {
if(otherChild == lockedChild)
lockedChild->setEnabled(true);
else
otherChild->setEnabled(false);
}
// else unlock all
else
otherChild->setEnabled(true);
}
if(lockedChild) {
if(lockedChild->isFocusable())
focusChild(lockedChild, Fw::ActiveFocusReason);
}
}
bool UIWidget::propagateOnMousePress(const Point& mousePos, Fw::MouseButton button)
{
// do a backup of children list, because it may change while looping it
UIWidgetPtr clickedChild;
for(const UIWidgetPtr& child : m_children) {
// events on hidden or disabled widgets are discarded
if(!child->isExplicitlyEnabled() || !child->isExplicitlyVisible())
continue;
// mouse press events only go to children that contains the mouse position
if(child->containsPoint(mousePos) && child == getChildByPos(mousePos)) {
clickedChild = child;
break;
}
}
if(clickedChild) {
// focusable child gains focus when clicked
if(clickedChild->isFocusable())
focusChild(clickedChild, Fw::MouseFocusReason);
// stop propagating if the child accept the event
if(clickedChild->propagateOnMousePress(mousePos, button))
return true;
}
// only non phatom widgets receives mouse press events
if(!isPhantom()) {
bool ret = onMousePress(mousePos, button);
if(button == Fw::MouseLeftButton && !isPressed())
setPressed(true);
return ret;
}
return false;
}
