/* * Copyright (c) 1995, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.awt;import java.awt.*;import java.util.BitSet;/** * A layout manager for a container that lays out grids. Allows setting * the relative sizes of rows and columns. * * @author Herb Jellinek */public class VariableGridLayout extends GridLayout { BitSet rowsSet = new BitSet(); double rowFractions[] = null; BitSet colsSet = new BitSet(); double colFractions[] = null; int rows; int cols; int hgap; int vgap; /** * Creates a grid layout with the specified rows and specified columns. * @param rows the rows * @param cols the columns */ public VariableGridLayout(int rows, int cols) { this(rows, cols, 0, 0); if (rows != 0) { rowsSet = new BitSet(rows); stdRowFractions(rows); } if (cols != 0) { colsSet = new BitSet(cols); stdColFractions(cols); } } /** * Creates a grid layout with the specified rows, columns, * horizontal gap, and vertical gap. * @param rows the rows * @param cols the columns * @param hgap the horizontal gap variable * @param vgap the vertical gap variable * @exception IllegalArgumentException If the rows and columns are invalid. */ public VariableGridLayout(int rows, int cols, int hgap, int vgap) { super(rows, cols, hgap, vgap); this.rows = rows; this.cols = cols; this.hgap = hgap; this.vgap = vgap; if (rows != 0) { rowsSet = new BitSet(rows); stdRowFractions(rows); } if (cols != 0) { colsSet = new BitSet(cols); stdColFractions(cols); } } void stdRowFractions(int nrows) { rowFractions = new double[nrows]; for (int i = 0; i < nrows; i++) { rowFractions[i] = 1.0 / nrows; } } void stdColFractions(int ncols) { colFractions = new double[ncols]; for (int i = 0; i < ncols; i++) { colFractions[i] = 1.0 / ncols; } } public void setRowFraction(int rowNum, double fraction) { rowsSet.set(rowNum); rowFractions[rowNum] = fraction; } public void setColFraction(int colNum, double fraction) { colsSet.set(colNum); colFractions[colNum] = fraction; } public double getRowFraction(int rowNum) { return rowFractions[rowNum]; } public double getColFraction(int colNum) { return colFractions[colNum]; } void allocateExtraSpace(double vec[], BitSet userSet) { // collect the space that's been explicitly allocated... double total = 0.0; int unallocated = 0; int i; for (i = 0; i < vec.length; i++) { if (userSet.get(i)) { total += vec[i]; } else { unallocated++; } } // ... then spread the extra space if (unallocated != 0) { double space = (1.0 - total) / unallocated; for (i = 0; i < vec.length; i++) { if (!userSet.get(i)) { vec[i] = space; userSet.set(i); } } } } void allocateExtraSpace() { allocateExtraSpace(rowFractions, rowsSet); allocateExtraSpace(colFractions, colsSet); } /** * Lays out the container in the specified panel. * @param parent the specified component being laid out * @see Container */ public void layoutContainer(Container parent) { Insets insets = parent.insets(); int ncomponents = parent.countComponents(); int nrows = rows; int ncols = cols; if (nrows > 0) { ncols = (ncomponents + nrows - 1) / nrows; } else { nrows = (ncomponents + ncols - 1) / ncols; } if (rows == 0) { stdRowFractions(nrows); } if (cols == 0) { stdColFractions(ncols); } Dimension size = parent.size(); int w = size.width - (insets.left + insets.right); int h = size.height - (insets.top + insets.bottom); w = (w - (ncols - 1) * hgap); h = (h - (nrows - 1) * vgap); allocateExtraSpace(); for (int c = 0, x = insets.left ; c < ncols ; c++) { int colWidth = (int)(getColFraction(c) * w); for (int r = 0, y = insets.top ; r < nrows ; r++) { int i = r * ncols + c; int rowHeight = (int)(getRowFraction(r) * h); if (i < ncomponents) { parent.getComponent(i).reshape(x, y, colWidth, rowHeight); } y += rowHeight + vgap; } x += colWidth + hgap; } } static String fracsToString(double array[]) { String result = "["+array.length+"]"; for (int i = 0; i < array.length; i++) { result += "<"+array[i]+">"; } return result; } /** * Returns the String representation of this VariableGridLayout's values. */ public String toString() { return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap + ",rows=" + rows + ",cols=" + cols + ",rowFracs=" + fracsToString(rowFractions) + ",colFracs=" + fracsToString(colFractions) + "]"; }}
/*
* Copyright (c) 1995, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.awt;
import java.awt.*;
import java.util.BitSet;
/**
* A layout manager for a container that lays out grids. Allows setting
* the relative sizes of rows and columns.
*
* @author Herb Jellinek
*/
public class VariableGridLayout extends GridLayout {
BitSet rowsSet = new BitSet();
double rowFractions[] = null;
BitSet colsSet = new BitSet();
double colFractions[] = null;
int rows;
int cols;
int hgap;
int vgap;
/**
* Creates a grid layout with the specified rows and specified columns.
* @param rows the rows
* @param cols the columns
*/
public VariableGridLayout(int rows, int cols) {
this(rows, cols, 0, 0);
if (rows != 0) {
rowsSet = new BitSet(rows);
stdRowFractions(rows);
}
if (cols != 0) {
colsSet = new BitSet(cols);
stdColFractions(cols);
}
}
/**
* Creates a grid layout with the specified rows, columns,
* horizontal gap, and vertical gap.
* @param rows the rows
* @param cols the columns
* @param hgap the horizontal gap variable
* @param vgap the vertical gap variable
* @exception IllegalArgumentException If the rows and columns are invalid.
*/
public VariableGridLayout(int rows, int cols, int hgap, int vgap) {
super(rows, cols, hgap, vgap);
this.rows = rows;
this.cols = cols;
this.hgap = hgap;
this.vgap = vgap;
if (rows != 0) {
rowsSet = new BitSet(rows);
stdRowFractions(rows);
}
if (cols != 0) {
colsSet = new BitSet(cols);
stdColFractions(cols);
}
}
void stdRowFractions(int nrows) {
rowFractions = new double[nrows];
for (int i = 0; i < nrows; i++) {
rowFractions[i] = 1.0 / nrows;
}
}
void stdColFractions(int ncols) {
colFractions = new double[ncols];
for (int i = 0; i < ncols; i++) {
colFractions[i] = 1.0 / ncols;
}
}
public void setRowFraction(int rowNum, double fraction) {
rowsSet.set(rowNum);
rowFractions[rowNum] = fraction;
}
public void setColFraction(int colNum, double fraction) {
colsSet.set(colNum);
colFractions[colNum] = fraction;
}
public double getRowFraction(int rowNum) {
return rowFractions[rowNum];
}
public double getColFraction(int colNum) {
return colFractions[colNum];
}
void allocateExtraSpace(double vec[], BitSet userSet) {
// collect the space that's been explicitly allocated...
double total = 0.0;
int unallocated = 0;
int i;
for (i = 0; i < vec.length; i++) {
if (userSet.get(i)) {
total += vec[i];
} else {
unallocated++;
}
}
// ... then spread the extra space
if (unallocated != 0) {
double space = (1.0 - total) / unallocated;
for (i = 0; i < vec.length; i++) {
if (!userSet.get(i)) {
vec[i] = space;
userSet.set(i);
}
}
}
}
void allocateExtraSpace() {
allocateExtraSpace(rowFractions, rowsSet);
allocateExtraSpace(colFractions, colsSet);
}
/**
* Lays out the container in the specified panel.
* @param parent the specified component being laid out
* @see Container
*/
public void layoutContainer(Container parent) {
Insets insets = parent.insets();
int ncomponents = parent.countComponents();
int nrows = rows;
int ncols = cols;
if (nrows > 0) {
ncols = (ncomponents + nrows - 1) / nrows;
} else {
nrows = (ncomponents + ncols - 1) / ncols;
}
if (rows == 0) {
stdRowFractions(nrows);
}
if (cols == 0) {
stdColFractions(ncols);
}
Dimension size = parent.size();
int w = size.width - (insets.left + insets.right);
int h = size.height - (insets.top + insets.bottom);
w = (w - (ncols - 1) * hgap);
h = (h - (nrows - 1) * vgap);
allocateExtraSpace();
for (int c = 0, x = insets.left ; c < ncols ; c++) {
int colWidth = (int)(getColFraction(c) * w);
for (int r = 0, y = insets.top ; r < nrows ; r++) {
int i = r * ncols + c;
int rowHeight = (int)(getRowFraction(r) * h);
if (i < ncomponents) {
parent.getComponent(i).reshape(x, y, colWidth, rowHeight);
}
y += rowHeight + vgap;
}
x += colWidth + hgap;
}
}
static String fracsToString(double array[]) {
String result = "["+array.length+"]";
for (int i = 0; i < array.length; i++) {
result += "<"+array[i]+">";
}
return result;
}
/**
* Returns the String representation of this VariableGridLayout's values.
*/
public String toString() {
return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap +
",rows=" + rows + ",cols=" + cols +
",rowFracs=" +
fracsToString(rowFractions) +
",colFracs=" +
fracsToString(colFractions) + "]";
}
}