/**
* This method starts the process of editing a new slide show. If a pose is already being edited,
* it will prompt the user to save it first.
*/
public void handleNewSlideShowRequest() {
try {
// WE MAY HAVE TO SAVE CURRENT WORK
boolean continueToMakeNew = true;
if (!saved) {
// THE USER CAN OPT OUT HERE WITH A CANCEL
continueToMakeNew = promptToSave();
}
// IF THE USER REALLY WANTS TO MAKE A NEW COURSE
if (continueToMakeNew) {
// RESET THE DATA, WHICH SHOULD TRIGGER A RESET OF THE UI
SlideShowModel slideShow = ui.getSlideShow();
slideShow.reset();
saved = false;
// REFRESH THE GUI, WHICH WILL ENABLE AND DISABLE
// THE APPROPRIATE CONTROLS
ui.updateToolbarControls(saved);
// MAKE SURE THE TITLE CONTROLS ARE ENABLED
ui.reloadTitleControls();
}
} catch (IOException ioe) {
ErrorHandler eH = ui.getErrorHandler();
eH.processError(LanguagePropertyType.ERROR_UNEXPECTED);
}
}
/**
* This helper method verifies that the user really wants to save their unsaved work, which they
* might not want to do. Note that it could be used in multiple contexts before doing other
* actions, like creating a new pose, or opening another pose, or exiting. Note that the user will
* be presented with 3 options: YES, NO, and CANCEL. YES means the user wants to save their work
* and continue the other action (we return true to denote this), NO means don't save the work but
* continue with the other action (true is returned), CANCEL means don't save the work and don't
* continue with the other action (false is retuned).
*
* @return true if the user presses the YES option to save, true if the user presses the NO option
* to not save, false if the user presses the CANCEL option to not continue.
*/
private boolean promptToSave() throws IOException {
// PROMPT THE USER TO SAVE UNSAVED WORK
boolean saveWork = true;
// IF THE USER SAID YES, THEN SAVE BEFORE MOVING ON
if (saveWork) {
SlideShowModel slideShow = ui.getSlideShow();
slideShowIO.saveSlideShow(slideShow);
saved = true;
} // IF THE USER SAID CANCEL, THEN WE'LL TELL WHOEVER
// CALLED THIS THAT THE USER IS NOT INTERESTED ANYMORE
else if (!true) {
return false;
}
// IF THE USER SAID NO, WE JUST GO ON WITHOUT SAVING
// BUT FOR BOTH YES AND NO WE DO WHATEVER THE USER
// HAD IN MIND IN THE FIRST PLACE
return true;
}
/**
* This helper method asks the user for a file to open. The user-selected file is then loaded and
* the GUI updated. Note that if the user cancels the open process, nothing is done. If an error
* occurs loading the file, a message is displayed, but nothing changes.
*/
private void promptToOpen() {
// AND NOW ASK THE USER FOR THE COURSE TO OPEN
FileChooser slideShowFileChooser = new FileChooser();
slideShowFileChooser.setInitialDirectory(new File(PATH_SLIDE_SHOWS));
File selectedFile = slideShowFileChooser.showOpenDialog(ui.getWindow());
// ONLY OPEN A NEW FILE IF THE USER SAYS OK
if (selectedFile != null) {
try {
SlideShowModel slideShowToLoad = ui.getSlideShow();
slideShowIO.loadSlideShow(slideShowToLoad, selectedFile.getAbsolutePath());
ui.reloadSlideShowPane();
saved = true;
ui.updateToolbarControls(saved);
} catch (Exception e) {
ErrorHandler eH = ui.getErrorHandler();
eH.processError(LanguagePropertyType.ERROR_UNEXPECTED);
}
}
}
/**
* This method will save the current slideshow to a file. Note that we already know the name of
* the file, so we won't need to prompt the user.
*/
public boolean handleSaveSlideShowRequest() {
try {
// GET THE SLIDE SHOW TO SAVE
SlideShowModel slideShowToSave = ui.getSlideShow();
// SAVE IT TO A FILE
slideShowIO.saveSlideShow(slideShowToSave);
// MARK IT AS SAVED
saved = true;
// AND REFRESH THE GUI, WHICH WILL ENABLE AND DISABLE
// THE APPROPRIATE CONTROLS
ui.updateToolbarControls(saved);
return true;
} catch (IOException ioe) {
ErrorHandler eH = ui.getErrorHandler();
eH.processError(LanguagePropertyType.ERROR_UNEXPECTED);
return false;
}
}