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Added the beginnings of a class to represent an undo list.

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git-svn-id: http://openexile.googlecode.com/svn/trunk@82 4ebdad44-0ea0-11de-aab3-ff745001d230
This commit is contained in:
Celtic Minstrel
2009-05-30 04:34:46 +00:00
parent d2d88311db
commit 4359bb558e
3 changed files with 91 additions and 0 deletions
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6
osx/BoE.xcodeproj/project.pbxproj
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@@ -43,6 +43,7 @@
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@@ -331,6 +332,8 @@
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@@ -804,6 +807,8 @@
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913D03340FA0FFFF00184C18 /* src */,
912283C70FD0E16B00B21642 /* undo.h */,
912283C80FD0E16C00B21642 /* undo.cpp */,
);
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@@ -1231,6 +1236,7 @@
91C1FCA90FCB6F7200EBAA65 /* field.cpp in Sources */,
91C1FCAA0FCB6F7200EBAA65 /* message.cpp in Sources */,
91C1FCAB0FCB6F7300EBAA65 /* pict.cpp in Sources */,
912283C90FD0E16C00B21642 /* undo.cpp in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};

40
osx/tools/undo.cpp Normal file
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@@ -0,0 +1,40 @@
/*
* undo.cpp
* BoE
*
* Created by Celtic Minstrel on 29/05/09.
*
*/
#include "undo.h"
cUndoList::cUndoList(){
lastSave = cur = theList.begin();
}
size_t cUndoList::maxUndoSize = 0;
//TODO: These functions should have error checking to ensure they do not access an out of bounds action
void cUndoList::undo(){
(*cur)->undo();
cur--;
}
void cUndoList::redo(){
cur++;
(*cur)->redo();
}
void cUndoList::save(){
lastSave = cur;
}
void cUndoList::revert(){
while(cur != lastSave) undo();
}
void cUndoList::add(cAction* what){
theList.push_back(what);
num_actions++;
while(num_actions > maxUndoSize) theList.pop_front(), num_actions--;
}

45
osx/tools/undo.h Normal file
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@@ -0,0 +1,45 @@
/*
* undo.h
* BoE
*
* Created by Celtic Minstrel on 29/05/09.
*
* For use in creating an undo history in the scenario editor.
* Could also be used in the PC editor.
*
*/
#include <list>
class cAction {
public:
virtual void undo() = 0; // undoes this action if it has not already been undone
virtual void redo() = 0; // redoes this action if it has been undone
virtual bool isDone() = 0; // checks to see whether the action has been undone; returns false if it has
virtual std::string getActionName() = 0; // returns the name of this action for display in the Edit menu
virtual ~cAction();
};
class cUndoList {
std::list<cAction*> theList;
std::list<cAction*>::iterator cur, lastSave;
size_t num_actions;
public:
cUndoList();
void undo(); // undoes the current action and decrements the cur pointer
void redo(); // increments the cur pointer and redoes the current action
void save(); // sets the last saved action to the current action
void revert(); // undoes all actions back to (but excluding) the last saved action
void add(cAction* what);
static size_t maxUndoSize;
};
// As a special convention, I will prefix action classes with 'a' instead of 'c'
/*
class aEditMonster : public cAction {
cMonster oldMonst, newMonst;
};
class aEditItem : public cAction {
cItemRec oldItem, newItem;
};*/