/*
* 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.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 Polyline function draws a series of line segments by connecting the points in the
* specified array.
* <p/>
* The polyline does not use the current cursor position as starting point of the first
* line. The starting point is defined by the first coordinate of the point-array.
*/
public class MfCmdPolyline extends MfCmd
{
private int[] points_x;
private int[] points_y;
private int[] scaled_points_x;
private int[] scaled_points_y;
private int count;
public MfCmdPolyline()
{
}
/**
* 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();
int cx = state.getCurPosX();
int cy = state.getCurPosY();
final int[] points_x = getScaledPointsX();
final int[] points_y = getScaledPointsY();
if (state.getLogPen().isVisible())
{
state.prepareDraw();
cx = points_x[0];
cy = points_y[0];
final Line2D.Double line = new Line2D.Double();
for (int i = 1; i < count; i++)
{
final int destX = points_x[i];
final int destY = points_y[i];
line.setLine(cx, cy, destX, destY);
graph.draw(line);
cx = destX;
cy = destY;
}
state.postDraw();
}
state.setCurPos(cx, cy);
}
/**
* Creates a empty unintialized copy of this command implementation.
*
* @return a new instance of the command.
*/
public MfCmd getInstance()
{
return new MfCmdPolyline();
}
/**
* 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.POLYLINE;
}
public String toString()
{
final StringBuffer b = new StringBuffer();
b.append("[POLYLINE] count=");
b.append(getPointCount());
final int l = getPointCount();
final int[] points_x = getPointsX();
final int[] points_y = getPointsY();
for (int i = 0; i < l; i++)
{
if (i != 0)
{
b.append(',');
}
b.append(" (");
b.append(points_x[i]);
b.append(',');
b.append(points_y[i]);
b.append(") ");
}
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 count = record.getParam(0);
final int[] points_x = new int[count];
final int[] points_y = new int[count];
for (int i = 0; i < count; i++)
{
points_x[i] = record.getParam(1 + 2 * i);
points_y[i] = record.getParam(2 + 2 * i);
}
setPointCount(count);
setPoints(points_x, points_y);
}
/**
* 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(getPointCount() * 2 + 1);
final int count = getPointCount();
final int[] points_x = getPointsX();
final int[] points_y = getPointsY();
record.setParam(0, count);
for (int i = 0; i < count; i++)
{
record.setParam(1 + 2 * i, points_x[i]);
record.setParam(2 + 2 * i, points_y[i]);
}
return record;
}
public void setPointCount(final int count)
{
this.count = count;
}
public void setPoints(final int[] points_x, final int[] points_y)
{
this.points_x = points_x;
this.points_y = points_y;
scaleXChanged();
scaleYChanged();
}
public int[] getPointsX()
{
return points_x;
}
public int[] getPointsY()
{
return points_y;
}
public int getPointCount()
{
return count;
}
public int[] getScaledPointsX()
{
return scaled_points_x;
}
public int[] getScaledPointsY()
{
return scaled_points_y;
}
/**
* 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_points_x = applyScaleX(points_x, scaled_points_x);
}
/**
* 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_points_y = applyScaleY(points_y, scaled_points_y);
}
}