http://imagej.273.s1.nabble.com/Display-an-image-on-a-JPanel-tp5005268p5005313.html
what I want. It tends to not work as expected in many situations.
using BorderLayout is probably simplest. But there are many options:
). It is flexible and powerful while remaining
fairly simple to use (unlike GridBagLayout). But it is a third party
> 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>