////////////////////////////////////////////////////////////////////////////////
//
// This file is part of Toolkit for Conceptual Modeling (TCM).
// (c) copyright 1996, Vrije Universiteit Amsterdam.
// Author: Frank Dehne (frank@cs.vu.nl).
//
// TCM is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or 
// (at your option) any later version.
//
// TCM is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TCM; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
////////////////////////////////////////////////////////////////////////////////
#include "tableviewer.h"
#include "table.h"
#include "cell.h"
#include "selectcellareacmd.h"

SelectCellAreaCmd::SelectCellAreaCmd(Table *t, TableViewer *v): Command(t, v) {
	tviewer = v;
	oldSelection = new List<Cell *> (*v->GetSelection());
	newSelection = new List<Cell *> (*v->GetSelection());
}

SelectCellAreaCmd::~SelectCellAreaCmd() {
	delete oldSelection;
	delete newSelection;
}
 
void SelectCellAreaCmd::TrackMouse(TrackType aPhase, Point*, Point*, 
				   Point *nextPoint) {
	Cell *cell;
	switch(aPhase) {
	case TRACK_PRESS:
	case TRACK_DRAG:
	case TRACK_RELEASE:
		if ((cell = 
		tviewer->HitCell(static_cast<int>(0.5 + ScaleCorrect(nextPoint->x)), 
					     static_cast<int>(0.5 + ScaleCorrect(nextPoint->y))))) {
			newSelection->add(cell);
			tviewer->SelectCell(cell);
		}
		break;
	default:
		error("unknown track type\n");
		break;
	}
}
 
void SelectCellAreaCmd::Execute() {
	if (newSelection->count() > 0) {
		Command::Execute();
		SetCmdDone(True);
		SayCommited();
	}
	else {
		GetMainWindow()->SetStatus("aborted: select area");
		Abort();
	}
}
 
void SelectCellAreaCmd::UnExecute() {
	if (check(newSelection->count() > 0)) {
		tviewer->DeselectAll();
		for (oldSelection->first(); !oldSelection->done(); 
				oldSelection->next())
			tviewer->SelectCell(oldSelection->cur());
		SetCmdDone(False);
		SayUndone();
	}
	else
		GetMainWindow()->SetStatus("aborted: undo select area");
}

void SelectCellAreaCmd::ReExecute() {
	for (newSelection->first(); !newSelection->done(); 
			newSelection->next()) {
		Cell *cell = newSelection->cur();
		tviewer->SelectCell(cell);
	}
	Execute();
}