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JIDE Common Layer (Professional Swing Components)
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/*
 * @(#)ResizableFrame.java 10/22/2005
 *
 * Copyright 2002 - 2005 JIDE Software Inc. All rights reserved.
 */
package com.jidesoft.swing;

import com.jidesoft.utils.SystemInfo;

import javax.swing.*;
import javax.swing.border.Border;
import java.awt.*;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

/** A resizable undecorated frame. */
public class ResizableFrame extends JFrame implements ResizableSupport {

    private ResizablePanel _resizablePanel;

    public ResizableFrame() throws HeadlessException {
        initComponents();
    }

    public ResizableFrame(GraphicsConfiguration gc) {
        super(gc);
        initComponents();
    }

    public ResizableFrame(String title) throws HeadlessException {
        super(title);
        initComponents();
    }

    public ResizableFrame(String title, GraphicsConfiguration gc) {
        super(title, gc);
        initComponents();
    }

    /** Initializes the resizable window. */
    protected void initComponents() {
        setUndecorated(true);

        _resizablePanel = new ResizablePanel() {
            @Override
            protected Resizable createResizable() {
                return new Resizable(this) {
                    @Override
                    public void resizing(int resizeDir, int newX, int newY, int newW, int newH) {
                        Container container = ResizableFrame.this.getContentPane();
                        if (SystemInfo.isJdk15Above()) {
                            container.setPreferredSize(new Dimension(newW, newH));
                        }
                        else if (container instanceof JComponent) {
                            ((JComponent) container).setPreferredSize(new Dimension(newW, newH));
                        }
                        if (!JFrame.isDefaultLookAndFeelDecorated()) {
                            ResizableFrame.this.setBounds(newX, newY, newW, newH);
                        }
                        ResizableFrame.this.resizing();
                    }


                    @Override
                    public void beginResizing(int resizeCorner) {
                        super.beginResizing(resizeCorner);
                        ResizableFrame.this.beginResizing();
                    }

                    @Override
                    public void endResizing(int resizeCorner) {
                        super.endResizing(resizeCorner);
                        ResizableFrame.this.endResizing();
                    }

                    @Override
                    public boolean isTopLevel() {
                        return true;
                    }
                };
            }
        };
        setContentPane(_resizablePanel);

        // make sure the content pane resized along with the window.
        addComponentListener(new ComponentAdapter() {
            @Override
            public void componentResized(ComponentEvent e) {
                _resizablePanel.setSize(getSize());
            }
        });
    }

    protected void beginResizing() {
    }

    protected void resizing() {
    }

    protected void endResizing() {
    }

    /**
     * Sets the border of the resizable window. Do not pass in an empty border. Otherwise the window
     * won't be resizable.
     *
     * @param border the border.
     */
    public void setBorder(Border border) {
        _resizablePanel.setBorder(border);
    }

    /**
     * Gets the border of the resizable window. By default, UIManagerLookup.getBorder("Resizable.resizeBorder")
     * will be used.
     *
     * @return the border.
     */
    public Border getBorder() {
        return _resizablePanel.getBorder();
    }

    /**
     * Gets the underlying Resizable.
     *
     * @return the Resizable.
     */
    public Resizable getResizable() {
        return _resizablePanel.getResizable();
    }
}