http://imagej.273.s1.nabble.com/Display-an-image-on-a-JPanel-tp5005268p5005326.html
). It is flexible and powerful while remaining
fairly simple to use (unlike GridBagLayout). But it is a third party
image. I can't resist adapting it for different image sizes from our
your link) and I see that it is included in Eclipse Keppler. I both use
> Hi Robert,
>
> > the JPanel that the JImagePanel was added to had a layout set to null,
> > when I commented out that line the errors went away
>
> The default layout of a JPanel is FlowLayout, which personally is never
> what I want. It tends to not work as expected in many situations.
>
> I would suggest one of the following:
>
> myPanel.setLayout(new BorderLayout());
> myPanel.setLayout(new BoxLayout(myPanel, BoxLayout.X_AXIS)); //
> components go horizontally
> myPanel.setLayout(new BoxLayout(myPanel, BoxLayout.Y_AXIS)); //
> components go vertically
>
> If all you want is the JImagePanel inside the JPanel and nothing else,
> using BorderLayout is probably simplest. But there are many options:
>
>
http://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html>
> My personal favorite layout manager for complex UIs is MigLayout (
>
http://www.miglayout.com/). It is flexible and powerful while remaining
> fairly simple to use (unlike GridBagLayout). But it is a third party
> library, not built in to the JDK.
>
> Regards,
> Curtis
>
>
> On Thu, Oct 24, 2013 at 3:02 PM, Robert Lockwood <
[hidden email]
> >wrote:
>
> > I found the error, the JPanel that the JImagePanel was added to had a
> > layout set to null, when I commented out that line the errors went away
> but
> > my GUI is messed up. Some how there was a design error that didn't show
> > until I tried to add the JImagePanel or I screwed something up ...
> >
> > Thanks Curtis and Johannes.
> >
> >
> > On Thu, Oct 24, 2013 at 12:39 PM, Robert Lockwood <
[hidden email]
> > >wrote:
> >
> > > Thanks Curtis, I have minimal code that re-creates the problem with an
> > > application class, TestApp, and a single class, JImagePanel.
> > >
> > > I have no idea how to get them into github. I've never had any
> > > cooperators with whom to collaborate so I'm absolutely ignorant of how
> to
> > > use github.
> > >
> > >
> > > On Thu, Oct 24, 2013 at 11:10 AM, Curtis Rueden <
[hidden email]>
> > wrote:
> > >
> > >> Hi Robert,
> > >>
> > >> Can you please post a complete example demonstrating the problem?
> > >> GitHub.com is a nice place to do this. It will make it much easier for
> > >> people to help you.
> > >>
> > >> Regards,
> > >> Curtis
> > >>
> > >>
> > >> On Thu, Oct 24, 2013 at 12:25 PM, Robert Lockwood <
>
[hidden email]
> > >> >wrote:
> > >>
> > >> > In order to have an ImagePanel for my application I downloaded the
> > >> > JImagePanel from GitHub in response to Johannes reply, created a
> class
> > >> for
> > >> > it in my project changing the package to my package in Eclipse
> > Keppler.
> > >> >
> > >> > In my GUI initialization where the GUI is built I have:
> > >> >
> > >> > jImagePanel = new JImagePanel();
> > >> > jImagePanel.setName("jImagePanel");
> > >> > jImagePanel.setBorder(new LineBorder(new Color(0, 0, 0)));
> > >> > jImagePanel.setBounds(10, 10, 641, 481);
> > >> > jImagePanel.setBackground(Color.WHITE);
> > >> > jImagePanel.setOpaque(false);
> > >> > pnlBase.add(jImagePanel);
> > >> >
> > >> > when the image is read I display it with:
> > >> >
> > >> > if (!jImagePanel.isOpaque()) {
> > >> > jImagePanel.setOpaque(true);
> > >> > }
> > >> >
> > >> > jImagePanel.updateImage(imp);
> > >> >
> > >> > When I shift from Source to Design Google Builder crashes indicating
> > >> > problems in JImagePanel's method paintCompnent().
> > >> >
> > >> > When I attempt to run it the GUI does not display properly, the
> > >> contents of
> > >> > the JFrame are gray. Moving the cursor over the contents exposes
> all
> > >> the
> > >> > JButtons, but nothing else, and clicking on the button results in
> the
> > >> > expected display of my file selector. If the file is selected the
> > image
> > >> > displays correctly as do all the other visual objects in the JFrame.
> > >> >
> > >> > I get NullPointerException errors that finger the same line that
> > trying
> > >> to
> > >> > move to Display fingers.
> > >> >
> > >> > I modified the below code to check that imp was not null but it had
> no
> > >> > effect.
> > >> >
> > >> > Johannes gave another URL for the code but I don't know how to get
> > that
> > >> > code.
> > >> >
> > >> > I guess I'm partway there ...
> > >> >
> > >> > From JImagePanel:
> > >> >
> > >> > @Override
> > >> > public void paintComponent(Graphics g) {
> > >> > super.paintComponent(g);
> > >> > try {
> > >> > if (imageUpdated) {
> > >> > imageUpdated = false;
> > >> > imp.updateImage();
> > >> > }
> > >> > Java2.setBilinearInterpolation(g,
> > >> > Prefs.interpolateScaledImages);
> > >> >
> > >> > Image img = imp.getProcessor().createImage(); // THIS
> IS
> > >> THE
> > >> > ERROR LINE
> > >> >
> > >> > if (img != null) {
> > >> > waitForImage(img);
> > >> > int displayWidth = (int) (srcRect.width *
> > >> magnification);
> > >> > int displayHeight = (int) (srcRect.height *
> > >> magnification);
> > >> > Dimension size = getSize();
> > >> > int offsetX = (size.width - displayWidth) / 2;
> > >> > int offsetY = (size.height - displayHeight) / 2;
> > >> > g.translate(offsetX, offsetY);
> > >> > g.drawImage(img, 0, 0, displayWidth, displayHeight,
> > >> > srcRect.x,
> > >> > srcRect.y, srcRect.x + srcRect.width,
> > srcRect.y
> > >> > + srcRect.height, null);
> > >> > }
> > >> > drawOverlay(g);
> > >> > } catch (OutOfMemoryError e) {
> > >> > IJ.outOfMemory("Paint");
> > >> > }
> > >> > }
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > On Wed, Oct 23, 2013 at 7:31 AM, Johannes Schindelin <
> > >> >
[hidden email]> wrote:
> > >> >
> > >> > > Hi Robert,
> > >> > >
> > >> > > On Tue, 22 Oct 2013, Robert Lockwood wrote:
> > >> > >
> > >> > > > I've an application that collects a monochrome "image" as an
> array
> > >> of
> > >> > > > "unsigned short" (short[]), saves it as a TIFF (thanks for that
> > >> help)
> > >> > > > and displays it on JPanel. I'd rather use the ImageJ methods
> etc.
> > >> to
> > >> > > > display the image on the JPanel and reduce my code.
> > >> > > >
> > >> > > > Is this possible? How?
> > >> > >
> > >> > > Unfortunately, the ImageCanvas -- ImageJ 1.x' AWT component
> intended
> > >> to
> > >> > > display images -- is tightly bound to the ImageWindow class and
> does
> > >> not
> > >> > > play well with other components in the same AWT container.
> > >> > >
> > >> > > Besides, all the claims that AWT and Swing mix well now seem to be
> > >> > > premature still.
> > >> > >
> > >> > > Therefore we integrated Simon Andrews' JImagePanel into Fiji:
> > >> > >
> > >> > >
> > >> > >
> > >> >
> > >>
> >
>
https://github.com/fiji/fiji/blob/master/src-plugins/fiji-lib/src/main/java/fiji/util/gui/JImagePanel.java> > >> > >
> > >> > > It should be relatively easy to integrate into your software: it
> is
> > >> > > contained in the fiji-lib artifact available at
> > >>
http://maven.imagej.net/> > >> > .
> > >> > >
> > >> > > You could also extract the file and insert into your own source
> > code,
> > >> of
> > >> > > course, but you'd ask for diverging versions.
> > >> > >
> > >> > > Ciao,
> > >> > > Johannes
> > >> > >
> > >> >
> > >> >
> > >> >
> > >> > --
> > >> > When I was 12 I thought I would live forever.
> > >> > So far, so good.
> > >> >
> > >> > --
> > >> > ImageJ mailing list:
http://imagej.nih.gov/ij/list.html> > >> >
> > >>
> > >> --
> > >> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html> > >>
> > >
> > >
> > >
> > > --
> > > When I was 12 I thought I would live forever.
> > > So far, so good.
> > >
> >
> >
> >
> > --
> > When I was 12 I thought I would live forever.
> > So far, so good.
> >
> > --
> > ImageJ mailing list:
http://imagej.nih.gov/ij/list.html> >
>
> --
> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>