| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.uima.tools.util.gui; |
| |
| import java.awt.Component; |
| import java.awt.Container; |
| |
| import javax.swing.Spring; |
| import javax.swing.SpringLayout; |
| |
| /** |
| * Utility methods for creating form- or grid-style layouts with SpringLayout. |
| */ |
| |
| 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, int yPad) { |
| 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(yPad))); |
| } |
| |
| // Set the parent's size. |
| SpringLayout.Constraints pCons = layout.getConstraints(parent); |
| pCons.setConstraint(SpringLayout.SOUTH, y); |
| pCons.setConstraint(SpringLayout.EAST, x); |
| } |
| } |