/*
Copyright 2003-2012 Dmitry Barashev, GanttProject Team
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject 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 for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sourceforge.ganttproject.gui.options;
import java.awt.Component;
import java.awt.Container;
import javax.swing.Spring;
import javax.swing.SpringLayout;
import com.google.common.base.Function;
/**
* A 1.4 file that provides utility methods for creating form- or grid-style
* layouts with SpringLayout. These utilities are used by several programs, such
* as SpringBox and SpringCompactGrid.
*/
public class SpringUtilities {
/**
* A debugging utility that prints to stdout the component's minimum,
* preferred, and maximum sizes.
*/
public static void printSizes(Component c) {
System.out.println("minimumSize = " + c.getMinimumSize());
System.out.println("preferredSize = " + c.getPreferredSize());
System.out.println("maximumSize = " + c.getMaximumSize());
}
/**
* Aligns the first <code>rows</code> * <code>cols</code> components of
* <code>parent</code> in a grid. Each component is as big as the maximum
* preferred width and height of the components. The parent is made just big
* enough to fit them all.
*
* @param rows
* number of rows
* @param cols
* number of columns
* @param initialX
* x location to start the grid at
* @param initialY
* y location to start the grid at
* @param xPad
* x padding between cells
* @param yPad
* y padding between cells
*/
public static void makeGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) {
SpringLayout layout;
try {
layout = (SpringLayout) parent.getLayout();
} catch (ClassCastException exc) {
System.err.println("The first argument to makeGrid must use SpringLayout.");
return;
}
Spring xPadSpring = Spring.constant(xPad);
Spring yPadSpring = Spring.constant(yPad);
Spring initialXSpring = Spring.constant(initialX);
Spring initialYSpring = Spring.constant(initialY);
int max = rows * cols;
// Calculate Springs that are the max of the width/height so that all
// cells have the same size.
Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).getWidth();
Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).getWidth();
for (int i = 1; i < max; i++) {
SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));
maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth());
maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight());
}
// Apply the new width/height Spring. This forces all the
// components to have the same size.
for (int i = 0; i < max; i++) {
SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));
cons.setWidth(maxWidthSpring);
cons.setHeight(maxHeightSpring);
}
// Then adjust the x/y constraints of all the cells so that they
// are aligned in a grid.
SpringLayout.Constraints lastCons = null;
SpringLayout.Constraints lastRowCons = null;
for (int i = 0; i < max; i++) {
SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));
if (i % cols == 0) { // start of new row
lastRowCons = lastCons;
cons.setX(initialXSpring);
} else { // x position depends on previous component
cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring));
}
if (i / cols == 0) { // first row
cons.setY(initialYSpring);
} else { // y position depends on previous row
cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring));
}
lastCons = cons;
}
// Set the parent's size.
SpringLayout.Constraints pCons = layout.getConstraints(parent);
pCons.setConstraint(SpringLayout.SOUTH,
Spring.sum(Spring.constant(yPad), lastCons.getConstraint(SpringLayout.SOUTH)));
pCons.setConstraint(SpringLayout.EAST, Spring.sum(Spring.constant(xPad), lastCons.getConstraint(SpringLayout.EAST)));
}
/* Used by makeCompactGrid. */
private static SpringLayout.Constraints getConstraintsForCell(int row, int col, Container parent, int cols) {
SpringLayout layout = (SpringLayout) parent.getLayout();
Component c = parent.getComponent(row * cols + col);
return layout.getConstraints(c);
}
/**
* Aligns the first <code>rows</code> * <code>cols</code> components of
* <code>parent</code> in a grid. Each component in a column is as wide as the
* maximum preferred width of the components in that column; height is
* similarly determined for each row. The parent is made just big enough to
* fit them all.
*
* @param rows
* number of rows
* @param cols
* number of columns
* @param initialX
* x location to start the grid at
* @param initialY
* y location to start the grid at
* @param xPad
* x padding between cells
* @param yPad
* y padding between cells
*/
public static void makeCompactGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad,
final int yPad) {
makeCompactGrid(parent, rows, cols, initialX, initialY, xPad, new Function<Integer, Integer>() {
@Override
public Integer apply(Integer input) {
return yPad;
}
});
}
public static void makeCompactGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad,
Function<Integer, Integer> getYpad) {
SpringLayout layout;
try {
layout = (SpringLayout) parent.getLayout();
} catch (ClassCastException exc) {
System.err.println("The first argument to makeCompactGrid must use SpringLayout.");
return;
}
// Align all cells in each column and make them the same width.
Spring x = Spring.constant(initialX);
for (int c = 0; c < cols; c++) {
Spring width = Spring.constant(0);
for (int r = 0; r < rows; r++) {
width = Spring.max(width, getConstraintsForCell(r, c, parent, cols).getWidth());
}
for (int r = 0; r < rows; r++) {
SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
constraints.setX(x);
constraints.setWidth(width);
}
x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad)));
}
// Align all cells in each row and make them the same height.
Spring y = Spring.constant(initialY);
for (int r = 0; r < rows; r++) {
Spring height = Spring.constant(0);
for (int c = 0; c < cols; c++) {
height = Spring.max(height, getConstraintsForCell(r, c, parent, cols).getHeight());
}
for (int c = 0; c < cols; c++) {
SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
constraints.setY(y);
constraints.setHeight(height);
}
y = Spring.sum(y, Spring.sum(height, Spring.constant(getYpad.apply(r))));
}
// Set the parent's size.
SpringLayout.Constraints pCons = layout.getConstraints(parent);
pCons.setConstraint(SpringLayout.SOUTH, y);
pCons.setConstraint(SpringLayout.EAST, x);
}
}