Changeset 0012e6 for molecuilder/src/Actions/small_actions.cpp

Timestamp:

Mar 24, 2010, 4:26:21 PM (16 years ago)

Author:

Tillmann Crueger <crueger@…>

Children:

521e29

Parents:

91379c

Message:

Added methods that allow bookkeeping of actions for undo/redo methods

File:

• molecuilder/src/Actions/small_actions.cpp (modified) (3 diffs)

molecuilder/src/Actions/small_actions.cpp

@@ -14 +14 @@
 /****** ChangeMoleculeNameAction *****/
 
+// memento to remember the state when undoing
+
+class ChangeMoleculeNameState : public ActionState {
+public:
+  ChangeMoleculeNameState(molecule* _mol,std::string _lastName) :
+    mol(_mol),
+    lastName(_lastName)
+  {}
+  molecule* mol;
+  std::string lastName;
+};
+
 char ChangeMoleculeNameAction::NAME[] = "Change filename of Molecule";
 
@@ -24 +36 @@
 {}
 
-void ChangeMoleculeNameAction::call() {
+ActionState* ChangeMoleculeNameAction::performCall() {
   string filename;
   molecule *mol = NULL;
@@ -31 +43 @@
   dialog->queryMolecule("Enter index of molecule: ",&mol,molecules);
   dialog->queryString("Enter name: ",&filename);
+
   if(dialog->display()) {
+    string oldName = mol->getName();
     mol->setName(filename);
+    delete dialog;
+    return new ChangeMoleculeNameState(mol,oldName);
   }
-
-  delete dialog;
+  return 0;
 }
 
-void ChangeMoleculeNameAction::undo() {
+ActionState* ChangeMoleculeNameAction::performUndo(ActionState* _state) {
+  ChangeMoleculeNameState *state = dynamic_cast<ChangeMoleculeNameState*>(_state);
+  ASSERT(state,"State passed to ChangeMoleculeNameAction::performUndo did not have correct type");
 
+  string newName = state->mol->getName();
+  state->mol->setName(state->lastName);
+
+  return new ChangeMoleculeNameState(state->mol,newName);
+}
+
+ActionState* ChangeMoleculeNameAction::performRedo(ActionState *_state){
+  // Undo and redo have to do the same for this action
+  return performUndo(_state);
 }
 
 bool ChangeMoleculeNameAction::canUndo() {
-  return false;
+  return true;
 }