Java JComponent Container getDeepestEmptyComponentAt(JComponent parent, Point location)

Description

get Deepest Empty Component At

License

Apache License

Declaration

private static Component getDeepestEmptyComponentAt(JComponent parent, Point location) 

Method Source Code

//package com.java2s;
/*// w ww  .  java  2 s.  c  o m
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * Licensed 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.Component;

import java.awt.Point;
import java.awt.Rectangle;

import javax.swing.JComponent;

public class Main {
    public static final int EMPTY_COMPONENT_SIZE = 5;

    private static Component getDeepestEmptyComponentAt(JComponent parent, Point location) {
        int size = parent.getComponentCount();

        for (int i = 0; i < size; i++) {
            Component child = parent.getComponent(i);

            if (child.isShowing()) {
                if (child.getWidth() < EMPTY_COMPONENT_SIZE || child.getHeight() < EMPTY_COMPONENT_SIZE) {
                    Point childLocation = child.getLocationOnScreen();
                    Rectangle bounds = new Rectangle();

                    bounds.x = childLocation.x;
                    bounds.y = childLocation.y;
                    bounds.width = child.getWidth();
                    bounds.height = child.getHeight();
                    bounds.grow(child.getWidth() < EMPTY_COMPONENT_SIZE ? EMPTY_COMPONENT_SIZE : 0,
                            child.getHeight() < EMPTY_COMPONENT_SIZE ? EMPTY_COMPONENT_SIZE : 0);

                    if (bounds.contains(location)) {
                        return child;
                    }
                }

                if (child instanceof JComponent) {
                    Component result = getDeepestEmptyComponentAt((JComponent) child, location);

                    if (result != null) {
                        return result;
                    }
                }
            }
        }

        return null;
    }
}

Related

1. getComponent(JComponent container, String name)
2. getComponentByName(boolean enableDeepSearch, JComponent rootComponent, String name)
3. getComponentsOfType(JComponent base, Class type)
4. getComponentState(JComponent c)
5. getDataFlavors(JComponent component)
6. getFirstChildComponentOfType(Component component, Class childComponentType)
7. getGlassPane(JComponent comp)
8. getGtkStyle(Object styleFactory, JComponent component, String regionName)
9. getGtkStyle(Object styleFactory, JComponent component, String regionName)