Shows the extensions on the system and their associated programs
//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.program.Program;
import org.eclipse.swt.widgets.*;
/**
* This class shows the extensions on the system and their associated programs.
*/
public class ShowPrograms {
/**
* Runs the application
*/
public void run() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Show Programs");
createContents(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
/**
* Creates the main window's contents
*
* @param shell the main window
*/
private void createContents(Shell shell) {
shell.setLayout(new GridLayout(2, false));
// Create the label and combo for the extensions
new Label(shell, SWT.NONE).setText("Extension:");
Combo extensionsCombo = new Combo(shell, SWT.BORDER | SWT.READ_ONLY);
extensionsCombo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Create the label and the
new Label(shell, SWT.NONE).setText("Program:");
final Label programName = new Label(shell, SWT.NONE);
programName.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Fill the combo with the extensions on the system
String[] extensions = Program.getExtensions();
for (int i = 0, n = extensions.length; i < n; i++) {
extensionsCombo.add(extensions[i]);
}
// Add a handler to get the selected extension, look up the associated
// program, and display the program's name
extensionsCombo.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
Combo combo = (Combo) event.widget;
// Get the program for the extension
Program program = Program.findProgram(combo.getText());
// Display the program's name
programName.setText(program == null ? "(None)" : program.getName());
}
});
// Create a list box to show all the programs on the system
List allPrograms = new List(shell, SWT.SINGLE | SWT.BORDER | SWT.H_SCROLL
| SWT.V_SCROLL);
GridData data = new GridData(GridData.FILL_BOTH);
data.horizontalSpan = 2;
allPrograms.setLayoutData(data);
// Put all the known programs into the list box
Program[] programs = Program.getPrograms();
for (int i = 0, n = programs.length; i < n; i++) {
String name = programs[i].getName();
allPrograms.add(name);
allPrograms.setData(name, programs[i]);
}
// Add a field for a data file
new Label(shell, SWT.NONE).setText("Data File:");
final Text dataFile = new Text(shell, SWT.BORDER);
dataFile.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Double-clicking a program in the list launches the program
allPrograms.addMouseListener(new MouseAdapter() {
public void mouseDoubleClick(MouseEvent event) {
List list = (List) event.widget;
if (list.getSelectionCount() > 0) {
String programName = list.getSelection()[0];
Program program = (Program) list.getData(programName);
program.execute(dataFile.getText());
}
}
});
// Let them use launch instead of execute
Button launch = new Button(shell, SWT.PUSH);
data = new GridData(GridData.FILL_HORIZONTAL);
data.horizontalSpan = 2;
launch.setLayoutData(data);
launch.setText("Use Program.launch() instead of Program.execute()");
launch.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
// Use launch
Program.launch(dataFile.getText());
}
});
}
/**
* The application entry point
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new ShowPrograms().run();
}
}
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