movieratingsui.java

来自「SUN公司发布的SmartTicket 2.0蓝图」· Java 代码 · 共 524 行 · 第 1/2 页

            addCommand(okCommand);

            cancelCommand = 
                new Command(uiController.getString(UIMessageCodes.CANCEL), 
                            Command.CANCEL, 1);

            addCommand(cancelCommand);
            setCommandListener(this);
        }

        public void init(MovieRating movieRating, String movieTitle) {
            this.movieRating = movieRating;

            titleItem.setText(movieTitle);
            movieRatingItem.init(movieRating.getStarNumber(), false);
            commentItem.setText(movieRating.getComment());
            messageField.setString(null);
        } 

        public void commandAction(Command command, Displayable displayable) {
            if (command == okCommand) {
                uiController.handleEvent(EventIds.EVENT_ID_MOVIE_RATING_MESSAGE_SEND_REQUESTED, 
                                         new Object[] {
                    messageField.getString()
                });
            } else {    // (command == cancelCommand)
                uiController.handleEvent(EventIds.EVENT_ID_MOVIE_RATING_MESSAGE_SEND_CANCELLED, 
                                         null);
            } 
        } 

    }

    public static class MovieRatingUI extends Form 
        implements CommandListener {
        private UIController uiController;
        private MovieRating movieRating;
        private StringItem titleItem;
        private MovieRatingItem movieRatingItem;
        private StringItem authorItem;
        private int authorItemNum;
        private TextField commentField;
        private StringItem commentItem;
        private int commentItemNum;
        private Command okCommand;
        private Command cancelCommand;

        public MovieRatingUI(UIController uiController) {
            super(uiController.getString(UIMessageCodes.RATE_MOVIE));

            this.uiController = uiController;
            titleItem = 
                new StringItem(uiController.getString(UIMessageCodes.MOVIE_TITLE), 
                               null);
            movieRatingItem = new MovieRatingItem(uiController);

            movieRatingItem.setLayout(Item.LAYOUT_NEWLINE_BEFORE 
                                      | Item.LAYOUT_NEWLINE_AFTER);

            authorItem = 
                new StringItem(uiController.getString(UIMessageCodes.AUTHOR), 
                               null);
            commentField = 
                new TextField(uiController.getString(UIMessageCodes.COMMENT), 
                              null, 100, TextField.ANY);
            commentItem = 
                new StringItem(uiController.getString(UIMessageCodes.COMMENT), 
                               null);
            okCommand = new Command(uiController.getString(UIMessageCodes.OK), 
                                    Command.OK, 1);
            cancelCommand = 
                new Command(uiController.getString(UIMessageCodes.CANCEL), 
                            Command.CANCEL, 1);

            append(titleItem);
            append(movieRatingItem);

            authorItemNum = append(authorItem);
            commentItemNum = append(commentField);

            addCommand(okCommand);
            addCommand(cancelCommand);
            setCommandListener(this);
        }

        public void init(MovieRating movieRating, String movieTitle) {
            this.movieRating = movieRating;

            titleItem.setText(movieTitle);

            if (movieRating.getAuthor().equals(MovieRating.AUTHOR_SELF)) {
                movieRatingItem.init(movieRating.getStarNumber(), true);
                delete(commentItemNum);
                insert(commentItemNum, commentField);

                if (get(authorItemNum).equals(authorItem)) {
                    delete(authorItemNum);

                    commentItemNum--;
                } 

                authorItem.setText(null);
                commentField.setString(movieRating.getComment());
            } else {
                movieRatingItem.init(movieRating.getStarNumber(), false);

                if (!get(authorItemNum).equals(authorItem)) {
                    insert(authorItemNum, authorItem);

                    commentItemNum++;
                } 

                delete(commentItemNum);
                insert(commentItemNum, commentItem);
                authorItem.setText(movieRating.getAuthor());
                commentItem.setText(movieRating.getComment());
            } 
        } 

        public void commandAction(Command command, Displayable displayable) {
            if (command == okCommand) {
                movieRating.setStarNumber(movieRatingItem.getValue());
                movieRating.setComment(commentField.getString());
                uiController.handleEvent(EventIds.EVENT_ID_MOVIE_RATING_SAVE_REQUESTED, 
                                         new Object[] {
                    movieRating
                });
            } else {    // (command == cancelCommand)
                uiController.handleEvent(EventIds.EVENT_ID_MOVIE_RATINGS_REQUESTED, 
                                         null);
            } 
        } 

    }

    private static class MovieRatingItem extends CustomItem {
        private UIController uiController;
        private Image fullStarImage;
        private Image emptyStarImage;
        private int numStars = 0;
        private boolean modified;
        private boolean editable;
        private boolean hasFocus;

        public MovieRatingItem(UIController uiController) {
            super(uiController.getString(UIMessageCodes.RATING));

            this.uiController = uiController;
            fullStarImage = 
                uiController.getImage(UIController.ICON_IDX_FULL_STAR);
            emptyStarImage = 
                uiController.getImage(UIController.ICON_IDX_EMPTY_STAR);
        }

        public void init(int numStars, boolean editable) {
            this.numStars = numStars;
            this.editable = editable;
        } 

        public int getMinContentHeight() {
            return Math.max(fullStarImage.getHeight(), 
                            emptyStarImage.getHeight());
        } 

        public int getMinContentWidth() {
            return 5 
                   * Math.max(fullStarImage.getWidth(), 
                              emptyStarImage.getWidth());
        } 

        public int getPrefContentHeight(int h) {
            return Math.max(fullStarImage.getHeight(), 
                            emptyStarImage.getHeight());
        } 

        public int getPrefContentWidth(int w) {
            return 5 
                   * Math.max(fullStarImage.getWidth(), 
                              emptyStarImage.getWidth());
        } 

        public int getValue() {
            return numStars;
        } 

        public boolean traverse(int dir, int viewportWidth, 
                                int viewportHeight, int[] visRect_inout) {
            switch (dir) {

            case Canvas.DOWN:

            case Canvas.UP:
                if (!editable || hasFocus) {
                    return false;
                } else {
                    hasFocus = true;

                    return true;
                } 

            case Canvas.LEFT:
                if (!editable) {
                    return false;
                } else if (!hasFocus) {
                    hasFocus = true;

                    return true;
                } else {
                    if (numStars > 0) {
                        numStars--;
                        modified = true;
                    } 

                    repaint();

                    return true;
                } 

            case Canvas.RIGHT:
                if (!editable) {
                    return false;
                } else if (!hasFocus) {
                    hasFocus = true;

                    return true;
                } else {
                    if (numStars < 5) {
                        numStars++;
                        modified = true;
                    } 

                    repaint();

                    return true;
                } 

            default:
                return modified;
            }
        } 

        public void traverseOut() {
            hasFocus = false;
        } 

        public void paint(Graphics g, int w, int h) {
            for (int i = 0; i != numStars; i++) {
                g.drawImage(fullStarImage, i * fullStarImage.getWidth(), 0, 
                            Graphics.TOP | Graphics.LEFT);
            } 

            for (int i = numStars; i != 5; i++) {
                g.drawImage(emptyStarImage, i * emptyStarImage.getWidth(), 0, 
                            Graphics.TOP | Graphics.LEFT);
            } 
        } 

    }

}