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#include "undobuffer.h"
#include "mainwindow.h"
UndoBuffer::UndoBuffer(QObject *parent) : QObject(parent)
{
curIdx = 0;
}
UndoBuffer::~UndoBuffer()
{
}
bool UndoBuffer::canUndo()
{
return curIdx > 0;
}
bool UndoBuffer::canRedo()
{
return curIdx < list.count();
}
void UndoBuffer::redo()
{
current()->redo();
curIdx++;
if (curIdx > list.count())
curIdx = list.count() - 1;
}
void UndoBuffer::undo()
{
current()->undo();
curIdx = list.indexOf(current());
}
void UndoBuffer::recordbefore(QString commandName, dive *affectedDive)
{
UndoCommand *cmd = new UndoCommand(commandName, affectedDive);
//If we are within the list, clear the extra UndoCommands.
if (list.count() > 0) {
if (curIdx + 1 < list.count()) {
for (int i = curIdx + 1; i < list.count(); i++) {
list.removeAt(i);
}
}
}
list.append(cmd);
curIdx = list.count();
}
void UndoBuffer::recordAfter(dive *affectedDive)
{
list.at(curIdx - 1)->setStateAfter(affectedDive);
}
UndoCommand::UndoCommand(QString commandName, dive *affectedDive)
{
name = commandName;
stateBefore = affectedDive;
}
void UndoCommand::undo()
{
if (name == "Delete Dive") {
record_dive(stateBefore);
MainWindow::instance()->recreateDiveList();
}
}
void UndoCommand::redo()
{
//To be implemented
}
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