Java BufferedImage Show printImageFromComponents(final Component _rootComponent, final int _currentColumn, final BufferedImage _bi)

Description

Print image from components.

License

Apache License

Parameter

Parameter	Description
_rootComponent	the root component
_currentColumn	the column of the current item
_bi	the bufferedImage which is altered and afterwards returned

Return

the BufferedImage which displays the complete graphical user interface landscape.

Declaration

private static BufferedImage printImageFromComponents(final Component _rootComponent, final int _currentColumn,
        final BufferedImage _bi) 

Method Source Code

//package com.java2s;
/*//from w  ww. j ava  2  s  . c o m
 * 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.
 */

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Panel;

import java.awt.Window;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main {
    /**
     * The dimension of one item in the picture (only necessary if the specified
     * operation is the CHECK_OP_IMAGE operation).
     */
    public static final Dimension D_ITEM = new Dimension(70, 10);
    /**
     * The distance of two items in the picture (only necessary if the specified
     * operation is the CHECK_OP_IMAGE operation).
     */
    public static final Dimension D_DISTANCE = new Dimension(12, 2);
    /**
     * Colors for displaying view.
     */
    private static final Color CLR_CORRECT = new Color(130, 131, 133), CLR_ERROR = new Color(255, 120, 120);
    /**
     * Font which is used for printing names inside the return image of
     * function printImageFormComponents().
     */
    private static final Font FONT_IMAGE = new Font("", Font.PLAIN, 10);
    /**
     * Current entry (has to be outside the function because 
     * it is only allowed to have one return value. Thus either
     * the BufferedImage or the currentEntry have to be externalized.
     */
    private static int currentEntry = 1;

    /**
     * Print image from components.
     * Recursive method.
     * 
     * @param _rootComponent    the root component
     * @param _currentColumn   the column of the current item
     * @param _bi            the bufferedImage which is altered and 
     *                      afterwards returned
     *                      
     * @return               the BufferedImage which displays the complete
     *                      graphical user interface landscape.
     */
    private static BufferedImage printImageFromComponents(final Component _rootComponent, final int _currentColumn,
            final BufferedImage _bi) {

        //save given values.
        BufferedImage bi_ret = _bi;

        int adjC = 0 + _currentColumn * (D_ITEM.width + D_DISTANCE.width);
        int adjR = 0 + currentEntry * (D_ITEM.height + D_DISTANCE.height);

        Graphics g = bi_ret.getGraphics();

        if (_rootComponent.getWidth() <= 0 || _rootComponent.getHeight() <= 0) {

            g.setColor(CLR_ERROR);
        } else {

            g.setColor(CLR_CORRECT);
        }

        g.drawRect(adjC, adjR, D_ITEM.width, D_ITEM.height);
        g.setFont(FONT_IMAGE);
        g.drawString(_rootComponent.getClass().getSimpleName(), adjC, adjR + D_ITEM.height);

        currentEntry++;

        if (_rootComponent instanceof JPanel) {
            for (Component x : ((JPanel) _rootComponent).getComponents()) {

                final int vorher = currentEntry + 1;
                currentEntry--;
                bi_ret = printImageFromComponents(x, _currentColumn + 1, _bi);
                currentEntry = Math.max(vorher, currentEntry);

            }

        } else if (_rootComponent instanceof JFrame) {

            for (Component x : ((JFrame) _rootComponent).getContentPane().getComponents()) {

                final int vorher = currentEntry + 1;
                currentEntry--;
                bi_ret = printImageFromComponents(x, _currentColumn + 1, _bi);
                currentEntry = Math.max(vorher, currentEntry);

            }

        } else if (_rootComponent instanceof Panel) {

            for (Component x : ((Panel) _rootComponent).getComponents()) {

                final int vorher = currentEntry + 1;
                currentEntry--;
                bi_ret = printImageFromComponents(x, _currentColumn + 1, _bi);
                currentEntry = Math.max(vorher, currentEntry);
            }

        } else if (_rootComponent instanceof Window) {

            for (Component x : ((Window) _rootComponent).getComponents()) {

                final int vorher = currentEntry + 1;
                currentEntry--;
                bi_ret = printImageFromComponents(x, _currentColumn + 1, _bi);
                currentEntry = Math.max(vorher, currentEntry);

            }
        }

        return bi_ret;
    }
}

Related

1. printImage(BufferedImage im, String title)
2. show(final BufferedImage image, final int width, final int height)
3. showBufferedImage(BufferedImage I)
4. showImage(BufferedImage im)
5. showImage(BufferedImage image, String title, boolean fitToScreen)