/**
* Sets the current action.
*/
void RS_EventHandler::setCurrentAction(RS_ActionInterface* action) {
RS_DEBUG->print("RS_EventHandler::setCurrentAction");
if (action==NULL) {
return;
}
// Predecessor of the new action or NULL:
RS_ActionInterface* predecessor = NULL;
// Suspend current action:
if(hasAction()){
predecessor = currentActions.last();
predecessor->suspend();
predecessor->hideOptions();
}
else {
if (defaultAction) {
predecessor = defaultAction;
predecessor->suspend();
predecessor->hideOptions();
}
}
// // Forget about the oldest action and make space for the new action:
// if (actionIndex==RS_MAXACTIONS-1) {
// // delete oldest action if necessary (usually never happens):
// if (currentActions[0]) {
// currentActions[0]->finish();
// delete currentActions[0];
// currentActions[0] = NULL;
// }
// // Move up actionstack (optimize):
// for (int i=0; i<RS_MAXACTIONS-1; ++i) {
// currentActions[i] = currentActions[i+1];
// }
// } else if (actionIndex<RS_MAXACTIONS-1) {
// actionIndex++;
// }
// Set current action:
currentActions.push_back(action);
RS_DEBUG->print("RS_EventHandler::setCurrentAction: current action is: %s",
currentActions.last()->getName().toLatin1().data());
// Initialisation of our new action:
RS_DEBUG->print("RS_EventHandler::setCurrentAction: init current action");
action->init();
// ## new:
if (action->isFinished()==false) {
RS_DEBUG->print("RS_EventHandler::setCurrentAction: show options");
currentActions.last()->showOptions();
RS_DEBUG->print("RS_EventHandler::setCurrentAction: set predecessor");
action->setPredecessor(predecessor);
}
RS_DEBUG->print("RS_EventHandler::setCurrentAction: cleaning up..");
cleanUp();
RS_DEBUG->print("RS_EventHandler::setCurrentAction: debugging actions");
debugActions();
RS_DEBUG->print("RS_GraphicView::setCurrentAction: OK");
}
/**
* Garbage collector for actions.
*/
void RS_EventHandler::cleanUp() {
RS_DEBUG->print("RS_EventHandler::cleanUp");
int o=0; // old index
int n=0; // new index
int resume=0; // index of action to resume
bool doResume=false; // do we need to resume an action
actionIndex = -1;
debugActions();
do {
// search first used action (o)
while (currentActions[o]==NULL && o<RS_MAXACTIONS) {
o++;
}
// delete action if it is finished
if (o<RS_MAXACTIONS && currentActions[o]!=NULL &&
currentActions[o]->isFinished()) {
delete currentActions[o];
currentActions[o] = NULL;
doResume = true;
}
// move a running action up in the stack
if (o<RS_MAXACTIONS && currentActions[o]!=NULL) {
if (n!=o) {
currentActions[n] = currentActions[o];
resume = n;
currentActions[o] = NULL;
} else {
if (o<RS_MAXACTIONS) {
o++;
}
}
actionIndex = n;
if (n<RS_MAXACTIONS-1) {
n++;
}
}
} while (o<RS_MAXACTIONS);
debugActions();
// Resume last used action:
if (doResume) {
if (currentActions[resume]!=NULL &&
!currentActions[resume]->isFinished()) {
currentActions[resume]->resume();
currentActions[resume]->showOptions();
} else {
if (defaultAction!=NULL) {
defaultAction->resume();
defaultAction->showOptions();
}
}
}
RS_DEBUG->print("RS_EventHandler::cleanUp: OK");
}
