// Main command preview flow
private ChangeListener<String> createUserInputListener() {
return (observable, oldValue, newValue) -> {
if (newValue.trim().isEmpty()) {
ui.setPreviewStatus(FEEDBACK_READY);
} else {
ui.setPreviewStatus(previewCommand(newValue));
}
};
}
// Listen for exit invoked by close button or system tray
private ChangeListener<Boolean> createIsExitListener() {
return (observable, oldValue, newValue) -> {
if (newValue.booleanValue()) {
if (!exit()) {
ui.resetIsExit();
ui.setPreviewStatus(Feedback.FEEDBACK_TRY_AGAIN);
}
}
};
}
// Main handle
public void initUi(Stage stage) {
ui = new UI(stage);
ui.attachHandlersAndListeners(
createKeyPressHandler(), createUserInputListener(), createIsExitListener());
if (hasStartupError) {
ui.createErrorDialog(ERROR_STARTUP_HEADER, ERROR_STARTUP_MESSAGE);
exit();
}
initUiTaskList();
ui.setPreviewStatus(FEEDBACK_READY);
}
// Process key press events
private EventHandler<KeyEvent> createKeyPressHandler() {
return (keyEvent) -> {
// Remove initial splash overlay
ui.hideSplashOverlay();
switch (keyEvent.getCode()) {
// Main command execution flow
case ENTER:
{
// Whitespace command
if (ui.getInput().trim().isEmpty()) {
ui.clearInput();
ui.hideHelpOverlay();
return;
}
// Hide help unless it's a help or exit command
if (!lastPreviewedCommand.getType().equals(CommandType.HELP)
&& !lastPreviewedCommand.getType().equals(CommandType.EXIT)) {
ui.hideHelpOverlay();
}
// All the work happens here!
String feedback = executeLastPreviewedCommand();
// Clear input box and display feedback
// ClearInput must come before setStatus as user input listener
// resets status when input is cleared
ui.clearInput();
ui.setExecuteStatus(feedback);
return;
}
// Edit description autocompletion
case TAB:
{
if (!hasLastPreviewedCommand()) {
return;
}
Command command = lastPreviewedCommand;
if (command.getType() != CommandType.EDIT_PARTIAL) {
return;
}
int lineNumber = lastPreviewedCommand.getLineNumber();
if (!isValidLineNumber(lineNumber)) {
return;
}
ui.setInput(
ui.getInput().trim() + " " + getTaskFromLineNumber(lineNumber).getDescription());
return;
}
// Scrolling
case UP:
{
ui.scrollUpScreen();
return;
}
case DOWN:
{
ui.scrollDownScreen();
return;
}
// Show help
case F1:
{
ui.showHelpOverlay();
if (ui.getInput().isEmpty()) {
ui.setPreviewStatus(FeedbackHelp.HELP);
}
return;
}
// Activate next help page using left/right keys
// (but only when the input box is empty)
case LEFT:
case RIGHT:
{
if (ui.getInput().isEmpty()) {
ui.nextHelpPage();
}
return;
}
// Hide help
case ESCAPE:
{
ui.hideHelpOverlay();
if (ui.getInput().trim().isEmpty()) {
ui.setPreviewStatus(FEEDBACK_READY);
}
return;
}
default:
break;
}
};
}