How do I limit file extentions in the selectOutput dialog?

jamcdonald120

I have a custom file type that my program can save as, but currently I can not figure out how to use the drop down menu of file name extensions to limit my users to only saving (and opening for that matter, but thats another question) files with a specific file extension. How do I do this?

kfrajer

https://docs.oracle.com/javase/tutorial/uiswing/components/filechooser.html

https://processing.org/discourse/beta/num_1263569258.html

and in the source code:

https://github.com/processing/processing/blob/master/core/src/processing/core/PApplet.java#L6469

Kf

jamcdonald120

after a brief scan through the links it appears that the top link might work, but it uses the wrong file browser, I would prefer if it used the one in my screen shot, the second link appears out dated, and I will have to do some digging through that 3rd link some more, I may be able to mine the code in there for my own implementation if the current implementation is lacking.

Chrisir

final int stateWaitForLoad = 0;
final int stateNormal      = 1;
final int stateError       = 2;
int state = stateWaitForLoad;

String loadPath=""; 
String loadedFile = ""; 


void setup() {

  size (1000, 600);
  background(111); 
  loadProgram();
}


void draw() {

  background(111);

  switch(state) {

  case stateWaitForLoad:
    text("waiting", 23, 23);
    break; 

  case stateNormal:
    text(loadedFile, 23, 23);
    break; 

  case stateError:
    text("User hit cancel", 23, 23);
    break; 

  default:
    break;
  }
}

// -----------------------------------------------------------

void loadProgram() {
  // init the dialog for loading 
  state = stateWaitForLoad;
  loadPath="";
  File start1 = new File(sketchPath("")+"/*.abc"); 
  selectInput("Select a file to load:", "fileSelectedForLoad", start1);
}

void fileSelectedForLoad(File selection) {
  if (selection == null) {
    // Error 
    println("Window was closed or the user hit cancel.");
    state=stateError;
  } else {
    loadPath   = selection.getAbsolutePath();
    loadedFile = selection.getAbsolutePath();
    println("User selected " + selection.getAbsolutePath());
    state = stateNormal;
  }
}

jamcdonald120

Chrisir that will probably work if I cant fine another way..... but I would prefer to use the drop down menu

Chrisir

I don't know - see a messy discussion here:

https://stackoverflow.com/questions/596429/adjust-selected-file-to-filefilter-in-a-jfilechooser