package org.chartsy.welcome.content;
import java.awt.Component;
import java.awt.Container;
import javax.swing.Spring;
import javax.swing.SpringLayout;
/**
*
* @author Viorel
*/
public class SpringUtilities
{
public static SpringLayout getLayout()
{
return new SpringLayout();
}
public static void printSizes(Component c)
{
System.out.println("minimumSize = " + c.getMinimumSize());
System.out.println("preferredSize = " + c.getPreferredSize());
System.out.println("maximumSize = " + c.getMaximumSize());
}
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;
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());
}
for (int i = 0; i < max; i++)
{
SpringLayout.Constraints cons
= layout.getConstraints(parent.getComponent(i));
cons.setWidth(maxWidthSpring);
cons.setHeight(maxHeightSpring);
}
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)
{
lastRowCons = lastCons;
cons.setX(initialXSpring);
}
else
{
cons.setX(Spring.sum(
lastCons.getConstraint(SpringLayout.EAST),
xPadSpring));
}
if (i / cols == 0)
{
cons.setY(initialYSpring);
}
else
{
cons.setY(Spring.sum(
lastRowCons.getConstraint(SpringLayout.SOUTH),
yPadSpring));
}
lastCons = cons;
}
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)));
}
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);
}
public static void makeCompactGrid(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 makeCompactGrid must use SpringLayout.");
return;
}
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)));
}
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(yPad)));
}
SpringLayout.Constraints pCons = layout.getConstraints(parent);
pCons.setConstraint(SpringLayout.SOUTH, y);
pCons.setConstraint(SpringLayout.EAST, x);
}
}