/**
* Moves the point or line if active.
*/
void AssociationLine::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
UMLScene* scene = m_associationWidget->umlScene();
QPointF oldPos = event->scenePos();
QPointF newPos(
scene->snappedX(oldPos.x()),
scene->snappedY(oldPos.y())
);
// Prevent the moving vertex from disappearing underneath a widget
// (else there's no way to get it back.)
UMLWidget *onW = scene->widgetAt(newPos);
if (onW && onW->baseType() != WidgetBase::wt_Box) { // boxes are transparent
const qreal pX = newPos.x();
const qreal pY = newPos.y();
const qreal wX = onW->x();
const qreal wY = onW->y();
const qreal wWidth = onW->width();
const qreal wHeight = onW->height();
if (pX > wX && pX < wX + wWidth) {
const qreal midX = wX + wWidth / 2.0;
if (pX <= midX)
newPos.setX(wX);
else
newPos.setX(wX + wWidth);
}
if (pY > wY && pY < wY + wHeight) {
const qreal midY = wY + wHeight / 2.0;
if (pY <= midY)
newPos.setY(wY);
else
newPos.setY(wY + wHeight);
}
}
if (m_activePointIndex != -1) {
// Move a single point (snap behaviour)
setPoint(m_activePointIndex, newPos);
}
else if (m_activeSegmentIndex != -1 && !isEndSegmentIndex(m_activeSegmentIndex)) {
// Move a segment (between two points, snap behaviour not implemented)
QPointF delta = event->scenePos() - event->lastScenePos();
setPoint(m_activeSegmentIndex, m_points[m_activeSegmentIndex] + delta);
setPoint(m_activeSegmentIndex + 1, m_points[m_activeSegmentIndex + 1] + delta);
}
}
/**
* Sets the second widget in the association using the current widget and
* creates the association.
* If the association between the two widgets using the current type of
* association is illegitimate, an error is shown and the association cancelled.
* Otherwise, the association is created and added to the scene, and the tool
* is changed to the default tool.
*
* @todo Why change to the default tool? Shouldn't it better to stay on
* association and let the user change with a right click? The tool to
* create widgets doesn't change to default after creating a widget
*/
void ToolBarStateAssociation::setSecondWidget()
{
Uml::AssociationType::Enum type = getAssociationType();
UMLWidget* widgetA = m_firstWidget;
UMLWidget* widgetB = currentWidget();
WidgetBase::WidgetType at = widgetA->baseType();
bool valid = true;
if (type == Uml::AssociationType::Generalization) {
type = AssocRules::isGeneralisationOrRealisation(widgetA, widgetB);
}
if (widgetA == widgetB) {
valid = AssocRules::allowSelf(type, at);
if (valid && type == Uml::AssociationType::Association) {
type = Uml::AssociationType::Association_Self;
}
} else {
valid = AssocRules::allowAssociation(type, widgetA, widgetB);
}
if (valid) {
AssociationWidget *temp = AssociationWidget::create(m_pUMLScene, widgetA, type, widgetB);
FloatingTextWidget *wt = temp->textWidgetByRole(Uml::TextRole::Coll_Message);
if (wt)
wt->showOperationDialog();
if (addAssociationInViewAndDoc(temp)) {
if (type == Uml::AssociationType::Containment) {
UMLObject *newContainer = widgetA->umlObject();
UMLObject *objToBeMoved = widgetB->umlObject();
if (newContainer && objToBeMoved) {
Model_Utils::treeViewMoveObjectTo(newContainer, objToBeMoved);
}
}
UMLApp::app()->document()->setModified();
}
} else {
//TODO improve error feedback: tell the user what are the valid type of associations for
//the second widget using the first widget
KMessageBox::error(0, i18n("Incorrect use of associations."), i18n("Association Error"));
}
cleanAssociation();
}