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Browse (Read 2296 times)
Neurologist
Browse
Mar 30th, 2010, 2:05pm  
Is there something in the code that makes the browse window appear? I made an image viewer, and I want it to ask the user for the image.
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WWW Neurologist AbdullahAhmed12  
Giles
Re: Browse
Reply #1 - Mar 30th, 2010, 2:11pm  
PImage theimage;
String selected = selectInput(); //this opens the "browse window"
if(selected!=null)  theimage = loadImage(selected);
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Neurologist
Worked!
Reply #2 - Mar 31st, 2010, 6:00am  
Worked; thanks Wink
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WWW Neurologist AbdullahAhmed12  
Neurologist
Re: Browse
Reply #3 - Apr 1st, 2010, 9:09am  
One more question:
How can I limit the choice to images only?
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WWW Neurologist AbdullahAhmed12  
PhiLho 
Re: Browse
Reply #4 - Apr 1st, 2010, 9:31am  
You cannot with selectInput.

You would have to copy the code in PApplet.java (selectFileImpl() method) and to add a file filter class.
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WWW  
Neurologist
Re: Browse
Reply #5 - Apr 1st, 2010, 9:45am  
Can you give an example?
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WWW Neurologist AbdullahAhmed12  
antiplastik
Re: Browse
Reply #6 - Apr 1st, 2010, 10:11am  
Here is a tutorial :
http://java.sun.com/docs/books/tutorial/uiswing/components/filechooser.html#filt...
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WWW  
PhiLho 
Re: Browse
Reply #7 - Apr 1st, 2010, 12:42pm  
In theory, it should be:
Code:
import java.awt.FileDialog;
import javax.swing.SwingUtilities;

void setup()
{
  size(500, 500);
  String filePath = selectImage("Choose an Image");
  println(filePath);
}

protected String selectImage(final String prompt)
{
  checkParentFrame();

  try
  {
    SwingUtilities.invokeAndWait(new Runnable()
    {
	public void run()
	{
	  FileDialog fileDialog = new FileDialog(parentFrame, prompt, FileDialog.LOAD);
	  fileDialog.setFilenameFilter(new FilterImages());
	  fileDialog.setVisible(true);
	  String directory = fileDialog.getDirectory();
	  String filename = fileDialog.getFile();
	  selectedFile = (filename == null) ? null : new File(directory, filename);
	}
    });
    return (selectedFile == null) ? null : selectedFile.getAbsolutePath();
  }
  catch (Exception e) 
  {
    e.printStackTrace();
    return null;
  }
}

class FilterImages implements FilenameFilter
{
  boolean accept(File dir, String name)
  {
    return name.endsWith(".jpg") || name.endsWith(".png");
  }
}

but "Filename filters do not function in Sun's reference implementation for Microsoft Windows."
Because that's AWT, ie. we are using the native Windows file chooser, so we cannot plug in Java code in it.
I will try with the Swing JFileChooser.
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WWW  
PhiLho 
Re: Browse
Reply #8 - Apr 1st, 2010, 1:08pm  
Code:
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.SwingUtilities;

void setup()
{
  size(500, 500);
  String filePath = selectImage("Choose an Image");
  println(filePath);
  if (filePath != null)
  {
    PImage img = loadImage(filePath);
    image(img, 0, 0);
  }
  else
  {
    exit();
  }
}

protected String selectImage(final String prompt)
{
  checkParentFrame();

  try
  {
    SwingUtilities.invokeAndWait(new Runnable()
    {
	public void run()
	{
	  JFileChooser fileDialog = new JFileChooser();
	  fileDialog.setDialogTitle(prompt);
	  FileNameExtensionFilter filter = new FileNameExtensionFilter(
		"JPG & PNG Images", "jpg", "png");
	  fileDialog.setFileFilter(filter);
	  int returnVal = fileDialog.showOpenDialog(parentFrame);
	  if (returnVal == JFileChooser.APPROVE_OPTION) 
	  {
	    selectedFile = fileDialog.getSelectedFile();
	  }
	}
    });
    return (selectedFile == null) ? null : selectedFile.getAbsolutePath();
  }
  catch (Exception e) 
  {
    e.printStackTrace();
    return null;
  }
}
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Neurologist
Re: Browse
Reply #9 - Apr 2nd, 2010, 12:00pm  
It worked, but how can I set it to show only images? I don't want it to show anything but folders and images?
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WWW Neurologist AbdullahAhmed12  
PhiLho 
Re: Browse
Reply #10 - Apr 2nd, 2010, 12:26pm  
Are you talking about the first or the second script? The first one indeed doesn't filter out non-image files, as I wrote. The second one is supposed to work...
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WWW  
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