/*
* 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 org.pentaho.reporting.libraries.pixie.wmf.MfRecord;
import org.pentaho.reporting.libraries.pixie.wmf.MfType;
import org.pentaho.reporting.libraries.pixie.wmf.WmfFile;
public class MfCmdScaleWindowExt extends MfCmd {
private static final int RECORD_SIZE = 4;
private static final int POS_Y_DENOM = 0;
private static final int POS_X_DENOM = 2;
private static final int POS_Y_NUM = 1;
private static final int POS_X_NUM = 3;
private int yNum;
private int yDenom;
private int xNum;
private int xDenom;
public MfCmdScaleWindowExt() {
}
/**
* Replays the command on the given WmfFile.
*
* @param file the meta file.
*/
public void replay( final WmfFile file ) {
file.getGraphics2D().scale
( (double) getXNum() / (double) getXDenom(),
(double) getYNum() / (double) getYDenom() );
}
/**
* Creates a new record based on the data stored in the MfCommand.
*
* @return the created record.
*/
public MfRecord getRecord()
throws RecordCreationException {
final MfRecord record = new MfRecord( RECORD_SIZE );
record.setParam( POS_X_DENOM, getXDenom() );
record.setParam( POS_X_NUM, getXNum() );
record.setParam( POS_Y_DENOM, getYDenom() );
record.setParam( POS_Y_NUM, getYNum() );
return record;
}
/**
* Creates a empty unintialized copy of this command implementation.
*
* @return a new instance of the command.
*/
public MfCmd getInstance() {
return new MfCmdScaleWindowExt();
}
/**
* 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.SCALE_WINDOW_EXT;
}
public String toString() {
final StringBuffer b = new StringBuffer();
b.append( "[SCALE_WINDOW] scaleX=" );
b.append( getXNum() );
b.append( '/' );
b.append( getXDenom() );
b.append( " scaley=" );
b.append( getYNum() );
b.append( '/' );
b.append( getYDenom() );
return b.toString();
}
/**
* 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 yD = record.getParam( 0 );
final int yN = record.getParam( 1 );
final int xD = record.getParam( 2 );
final int xN = record.getParam( 3 );
setXScale( xN, xD );
setYScale( yN, yD );
}
public void setXScale( final int xNum, final int xDenom ) {
this.xNum = xNum;
this.xDenom = xDenom;
}
public void setYScale( final int yNum, final int yDenom ) {
this.yNum = yNum;
this.yDenom = yDenom;
}
public double getXScale() {
return (double) xNum / xDenom;
}
public int getXNum() {
return xNum;
}
public int getXDenom() {
return xDenom;
}
public double getYScale() {
return (double) yNum / yDenom;
}
public int getYNum() {
return yNum;
}
public int getYDenom() {
return yDenom;
}
/**
* 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() {
}
/**
* 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() {
}
}