/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.libraries.pixie.wmf.records;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.geom.Line2D;
import org.pentaho.reporting.libraries.pixie.wmf.MfDcState;
import org.pentaho.reporting.libraries.pixie.wmf.MfRecord;
import org.pentaho.reporting.libraries.pixie.wmf.MfType;
import org.pentaho.reporting.libraries.pixie.wmf.WmfFile;
/**
* The LineTo function draws a line from the current position up to, but not including,
* the specified point. The cursor is set to the destination after drawing.
*/
public class MfCmdLineTo extends MfCmd
{
private static final int RECORD_SIZE = 2;
private static final int POS_X = 1;
private static final int POS_Y = 0;
private int destX;
private int destY;
private int scaled_destX;
private int scaled_destY;
public MfCmdLineTo()
{
}
/**
* Replays the command on the given WmfFile.
*
* @param file the meta file.
*/
public void replay(final WmfFile file)
{
final Graphics2D graph = file.getGraphics2D();
final MfDcState state = file.getCurrentState();
final int cx = state.getCurPosX();
final int cy = state.getCurPosY();
final Point destP = getScaledDestination();
if (state.getLogPen().isVisible())
{
state.prepareDraw();
graph.draw(new Line2D.Double(cx, cy, destP.x, destP.y));
state.postDraw();
}
state.setCurPos(destP.x, destP.y);
}
/**
* Creates a empty unintialized copy of this command implementation.
*
* @return a new instance of the command.
*/
public MfCmd getInstance()
{
return new MfCmdLineTo();
}
/**
* Reads the function identifier. Every record type is identified by a function number
* corresponding to one of the Windows GDI functions used.
*
* @return the function identifier.
*/
public int getFunction()
{
return MfType.LINE_TO;
}
public String toString()
{
final StringBuffer b = new StringBuffer();
b.append("[LINE_TO] destination=");
b.append(getDestination());
return b.toString();
}
public void setDestination(final Point p)
{
setDestination(p.x, p.y);
}
public void setDestination(final int x, final int y)
{
destX = x;
destY = y;
scaleXChanged();
scaleYChanged();
}
public Point getDestination()
{
return new Point(destX, destY);
}
public Point getScaledDestination()
{
return new Point(scaled_destX, scaled_destY);
}
/**
* Reads the command data from the given record and adjusts the internal parameters
* according to the data parsed.
* <p/>
* After the raw record was read from the datasource, the record is parsed by the
* concrete implementation.
*
* @param record the raw data that makes up the record.
*/
public void setRecord(final MfRecord record)
{
final int y = record.getParam(POS_Y);
final int x = record.getParam(POS_X);
setDestination(x, y);
}
/**
* Creates a new record based on the data stored in the MfCommand.
*
* @return the created record.
*/
public MfRecord getRecord()
{
final Point dest = getDestination();
final MfRecord record = new MfRecord(RECORD_SIZE);
record.setParam(POS_Y, dest.y);
record.setParam(POS_X, dest.x);
return record;
}
/**
* A callback function to inform the object, that the x scale has changed and the
* internal coordinate values have to be adjusted.
*/
protected void scaleXChanged()
{
scaled_destX = getScaledX(destX);
}
/**
* A callback function to inform the object, that the y scale has changed and the
* internal coordinate values have to be adjusted.
*/
protected void scaleYChanged()
{
scaled_destY = getScaledY(destY);
}
}