/*
* ====================================================================
*
* The Clearthought Software License, Version 1.0
*
* Copyright (c) 2001 Daniel Barbalace. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. The original software may not be altered. However, the classes
* provided may be subclasses as long as the subclasses are not
* packaged in the info.clearthought package or any subpackage of
* info.clearthought.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, AFFILATED BUSINESSES,
* OR ANYONE ELSE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
package info.clearthought.layout;
import java.util.*;
/**
* TableLayoutConstraints binds components to their constraints.
*
* @version 1.2 3/15/04
* @author Daniel E. Barbalace
*/
public class TableLayoutConstraints implements TableLayoutConstants
{
/** Cell in which the upper left corner of the component lays */
public int col1, row1;
/** Cell in which the lower right corner of the component lays */
public int col2, row2;
/** Horizontal justification if component occupies just one cell */
public int hAlign;
/** Verical justification if component occupies just one cell */
public int vAlign;
/**
* Constructs an TableLayoutConstraints with the default settings. This
* constructor is equivalent to TableLayoutConstraints(0, 0, 0, 0, FULL, FULL).
*/
public TableLayoutConstraints ()
{
col1 = row1 = col2 = row2 = 0;
hAlign = vAlign = FULL;
}
/**
* Constructs an TableLayoutConstraints from a string.
*
* @param constraints indicates TableLayoutConstraints's position and justification
* as a string in the form "row, column" or
* "row, column, horizontal justification, vertical
* justification" or "row 1, column 1, row 2, column 2".
* It is also acceptable to delimit the paramters with
* spaces instead of commas.
*/
public TableLayoutConstraints (String constraints)
{
// Use default values for any parameter not specified or specified
// incorrectly. The default parameters place the component in a single
// cell at column 0, row 0. The component is fully justified.
col1 = 0;
row1 = 0;
col2 = 0;
row2 = 0;
hAlign = FULL;
vAlign = FULL;
// Parse constraints using spaces or commas
StringTokenizer st = new StringTokenizer(constraints, ", ");
int numToken = st.countTokens();
try
{
// Check constraints
if ((numToken != 2) && (numToken != 4) && (numToken != 6))
throw new RuntimeException();
// Get the first column (assume component is in only one column)
String tokenA = st.nextToken();
col1 = new Integer(tokenA).intValue();
col2 = col1;
// Get the first row (assume component is in only one row)
String tokenB = st.nextToken();
row1 = new Integer(tokenB).intValue();
row2 = row1;
// Get next two tokens
tokenA = st.nextToken();
tokenB = st.nextToken();
try
{
// Attempt to use tokens A and B as col2 and row2
col2 = new Integer(tokenA).intValue();
row2 = new Integer(tokenB).intValue();
// Get next two tokens
tokenA = st.nextToken();
tokenB = st.nextToken();
}
catch (NumberFormatException error)
{
col2 = col1;
row2 = row1;
}
// Check if token means horizontally justification the component
if ((tokenA.equalsIgnoreCase("L")) || (tokenA.equalsIgnoreCase("LEFT")))
hAlign = LEFT;
else if ((tokenA.equalsIgnoreCase("C")) ||
(tokenA.equalsIgnoreCase("CENTER")))
hAlign = CENTER;
else if ((tokenA.equalsIgnoreCase("F")) ||
(tokenA.equalsIgnoreCase("FULL")))
hAlign = FULL;
else if ((tokenA.equalsIgnoreCase("R")) ||
(tokenA.equalsIgnoreCase("RIGHT")))
hAlign = RIGHT;
else if ((tokenA.equalsIgnoreCase("LD")) ||
(tokenA.equalsIgnoreCase("LEADING")))
hAlign = LEADING;
else if ((tokenA.equalsIgnoreCase("TL")) ||
(tokenA.equalsIgnoreCase("TRAILING")))
hAlign = TRAILING;
else
throw new RuntimeException();
// Check if token means horizontally justification the component
if ((tokenB.equalsIgnoreCase("T")) || (tokenB.equalsIgnoreCase("TOP")))
vAlign = TOP;
else if ((tokenB.equalsIgnoreCase("C")) ||
(tokenB.equalsIgnoreCase("CENTER")))
vAlign = CENTER;
else if ((tokenB.equalsIgnoreCase("F")) ||
(tokenB.equalsIgnoreCase("FULL")))
vAlign = FULL;
else if ((tokenB.equalsIgnoreCase("B")) ||
(tokenB.equalsIgnoreCase("BOTTOM")))
vAlign = BOTTOM;
else
throw new RuntimeException();
}
catch (NoSuchElementException error) {}
catch (RuntimeException error)
{
throw new IllegalArgumentException
("Expected constraints in one of the following formats:\n" +
" col1, row1\n col1, row1, col2, row2\n" +
" col1, row1, hAlign, vAlign\n" +
" col1, row1, col2, row2, hAlign, vAlign\n" +
"Constraints provided '" + constraints + "'");
}
// Make sure row2 >= row1
if (row2 < row1)
row2 = row1;
// Make sure col2 >= col1
if (col2 < col1)
col2 = col1;
}
/**
* Constructs an TableLayoutConstraints a set of constraints.
*
* @param col1 column where upper-left cornor of the component is placed
* @param row1 row where upper-left cornor of the component is placed
* @param col2 column where lower-right cornor of the component is placed
* @param row2 row where lower-right cornor of the component is placed
* @param hAlign horizontal justification of a component in a single cell
* @param vAlign vertical justification of a component in a single cell
*/
public TableLayoutConstraints
(int col1, int row1, int col2, int row2, int hAlign, int vAlign)
{
this.col1 = col1;
this.row1 = row1;
this.col2 = col2;
this.row2 = row2;
if ((hAlign == LEFT) ||
(hAlign == RIGHT) ||
(hAlign == CENTER) ||
(hAlign == FULL) ||
(hAlign == TRAILING))
{
this.hAlign = hAlign;
}
else
this.hAlign = FULL;
if ((vAlign == LEFT) ||
(vAlign == RIGHT) ||
(vAlign == CENTER))
{
this.vAlign = vAlign;
}
else
this.vAlign = FULL;
}
/**
* Gets a string representation of this TableLayoutConstraints.
*
* @return a string in the form "row 1, column 1, row 2, column 2, horizontal
* justification, vertical justification"
*/
public String toString ()
{
StringBuffer buffer = new StringBuffer();
buffer.append (col1);
buffer.append (", ");
buffer.append (row1);
buffer.append (", ");
buffer.append (col2);
buffer.append (", ");
buffer.append (row2);
buffer.append (", ");
final String h[] = {"left", "center", "full", "right", "leading",
"trailing"};
final String v[] = {"top", "center", "full", "bottom"};
buffer.append (h[hAlign]);
buffer.append (", ");
buffer.append (v[vAlign]);
return buffer.toString();
}
}