/*
* 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.Rectangle;
import java.awt.geom.Arc2D;
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 Arc function draws an elliptical arc.
* <p/>
* The points (nLeftRect, nTopRect) and (nRightRect, nBottomRect) specify the bounding
* rectangle. An ellipse formed by the specified bounding rectangle defines the curve of
* the arc. The arc extends in the current drawing direction from the point where it
* intersects the radial from the center of the bounding rectangle to the (nXStartArc,
* nYStartArc) point. The arc ends where it intersects the radial from the center of the
* bounding rectangle to the (nXEndArc, nYEndArc) point. If the starting point and ending
* point are the same, a complete ellipse is drawn.
* <p/>
* The arc is drawn using the current pen; it is not filled.
*/
public class MfCmdArc extends MfCmd
{
private static final int PARAM_X_END_POS = 0;
private static final int PARAM_Y_END_POS = 1;
private static final int PARAM_X_START_POS = 2;
private static final int PARAM_Y_START_POS = 3;
private static final int PARAM_BOTTOM_POS = 4;
private static final int PARAM_RIGHT_POS = 5;
private static final int PARAM_TOP_POS = 6;
private static final int PARAM_LEFT_POS = 7;
private static final int RECORD_SIZE = 8;
private int x;
private int y;
private int width;
private int height;
private int xstart;
private int ystart;
private int xend;
private int yend;
private int scaled_x;
private int scaled_y;
private int scaled_width;
private int scaled_height;
private int scaled_xstart;
private int scaled_ystart;
private int scaled_xend;
private int scaled_yend;
public MfCmdArc()
{
}
/**
* 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_x = getScaledX(x);
scaled_width = getScaledX(width);
scaled_xstart = getScaledX(xstart);
scaled_xend = getScaledX(xend);
}
/**
* A callback function to inform the object, that the x scale has changed and the
* internal coordinate values have to be adjusted.
*/
protected void scaleYChanged()
{
scaled_y = getScaledY(y);
scaled_height = getScaledY(height);
scaled_ystart = getScaledY(xstart);
scaled_yend = getScaledY(xend);
}
/**
* Creates a empty unintialized copy of this command implementation.
*
* @return a new instance of the command.
*/
public MfCmd getInstance()
{
return new MfCmdArc();
}
/**
* Replays the command on the given WmfFile.
*
* @param file the meta file.
*/
public void replay(final WmfFile file)
{
final Graphics2D graph = file.getGraphics2D();
final Rectangle rec = getScaledBounds();
final Point start = getScaledStartingIntersection();
final Point end = getScaledEndingIntersection();
final Arc2D arc = new Arc2D.Double();
arc.setArcType(Arc2D.OPEN);
arc.setFrame(rec.x, rec.y, rec.width, rec.height);
arc.setAngles(start.x, start.y, end.x, end.y);
final MfDcState state = file.getCurrentState();
if (state.getLogBrush().isVisible())
{
state.preparePaint();
graph.fill(arc);
state.postPaint();
}
if (state.getLogPen().isVisible())
{
state.prepareDraw();
graph.draw(arc);
state.postDraw();
}
}
/**
* 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.ARC;
}
public Rectangle getBounds()
{
return new Rectangle(x, y, width, height);
}
public Rectangle getScaledBounds()
{
return new Rectangle(scaled_x, scaled_y, scaled_width, scaled_height);
}
public void setBounds(final int x, final int y, final int width, final int height)
{
this.x = x;
this.y = y;
this.width = width;
this.height = height;
scaleXChanged();
scaleYChanged();
}
public void setStartingIntersection(final int x, final int y)
{
xstart = x;
ystart = y;
scaleXChanged();
scaleYChanged();
}
public Point getStartingIntersection()
{
return new Point(xstart, ystart);
}
public Point getScaledStartingIntersection()
{
return new Point(scaled_xstart, scaled_ystart);
}
public void setEndingIntersection(final int x, final int y)
{
xend = x;
yend = y;
scaleXChanged();
scaleYChanged();
}
public Point getEndingIntersection()
{
return new Point(xend, yend);
}
public Point getScaledEndingIntersection()
{
return new Point(scaled_xend, scaled_yend);
}
/**
* 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 xend = record.getParam(PARAM_X_END_POS);
final int yend = record.getParam(PARAM_Y_END_POS);
final int xstart = record.getParam(PARAM_X_START_POS);
final int ystart = record.getParam(PARAM_Y_START_POS);
final int bottom = record.getParam(PARAM_BOTTOM_POS);
final int right = record.getParam(PARAM_RIGHT_POS);
final int top = record.getParam(PARAM_TOP_POS);
final int left = record.getParam(PARAM_LEFT_POS);
setBounds(left, top, right - left, bottom - top);
setStartingIntersection(xstart, ystart);
setEndingIntersection(xend, yend);
}
/**
* Creates a new record based on the data stored in the MfCommand.
*
* @return the created record.
*/
public MfRecord getRecord()
{
final MfRecord record = new MfRecord(RECORD_SIZE);
final Rectangle bounds = getBounds();
final Point start = getStartingIntersection();
final Point end = getEndingIntersection();
record.setParam(PARAM_LEFT_POS, (int) bounds.getX());
record.setParam(PARAM_TOP_POS, (int) bounds.getY());
record.setParam(PARAM_RIGHT_POS, (int) (bounds.getX() + bounds.getWidth()));
record.setParam(PARAM_BOTTOM_POS, (int) (bounds.getY() + bounds.getHeight()));
record.setParam(PARAM_Y_START_POS, (int) (start.getY()));
record.setParam(PARAM_X_START_POS, (int) (start.getX()));
record.setParam(PARAM_Y_END_POS, (int) (end.getY()));
record.setParam(PARAM_X_END_POS, (int) (end.getX()));
return record;
}
public String toString()
{
final StringBuffer b = new StringBuffer(100);
b.append("[ARC] bounds=");
b.append(getBounds());
b.append(" startIntersection=");
b.append(getStartingIntersection());
b.append(" endingIntersection=");
b.append(getEndingIntersection());
return b.toString();
}
}