symbolinputmode.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 728 行 · 第 1/2 页

            { // choose the table sizes
                rows = cols = (int) Math.sqrt(symbolTableChars.length);
                if (rows*cols < symbolTableChars.length) {
                    rows++;
                }
                if (rows*cols < symbolTableChars.length) {
                    cols++;
                }
            }

            int w = getWidth() / cols;
            int h = getHeight() / rows;

            cellSize = (w > h) ? h : w;

            int cw = 0, ch = 0;

            int temp_cols = getWidth() / cellSize;
            if ( temp_cols > cols) {
                cols = temp_cols;
                rows = (int)Math.ceil((double)symbolTableChars.length / cols);
            }

            int[] fs = { Font.SIZE_LARGE, Font.SIZE_MEDIUM, Font.SIZE_SMALL };
            for (int i = 0; i < fs.length; i++) {
                font = Font.getFont(Font.FACE_SYSTEM,
                                    Font.STYLE_BOLD,
                                    fs[i]);
                cw = font.charWidth('M');
                ch = font.getHeight();
                if (cw <= cellSize && ch <= cellSize) {
                    break;
                }
            }

            ww = cols * cellSize;
            wh = rows * cellSize;

            hmargin = (cellSize - ch) / 2;
            wmargin = cellSize / 2;

            wx = (getWidth() - ww) / 2;
            wy = (getHeight() - wh) / 2;
        }

        /**
         * Notify this symbol table its being shown on the screen.
         * Overrides Canvas.showNotify.
         */
        protected void showNotify() {
            pos = newpos = defaultSymbolCursorPos;
        }

        /**
         * Called when the drawable area of the <code>Canvas</code> has
         * been changed.  This
         * method has augmented semantics compared to {@link
         * Displayable#sizeChanged(int,int) Displayable.sizeChanged}.
         *
         * @param w the new width in pixels of the drawable area of the
         * <code>Canvas</code>
         * @param h the new height in pixels of the drawable area of
         * the <code>Canvas</code>
         */
        protected void sizeChanged(int w, int h) {
            calculateProportions();
        }

        /**
         * Paint this symbol table.
         * Overrides Canvas.paint.
         *
         * @param g The Graphics object to paint to
         */
        protected void paint(Graphics g) {

            paintPanel(g);
        }

        /**
         * Paint the symbol table panel
         *
         * @param g The Graphics object to paint to
         */
        void paintPanel(Graphics g) {

            int clipX = g.getClipX();
            int clipY = g.getClipY();
            int clipW = g.getClipWidth();
            int clipH = g.getClipHeight();

            Font old_font = g.getFont();
            g.setFont(font);

            g.setGrayScale(255);
            g.fillRect(clipX, clipY, clipW, clipH);

            int sr = (clipY - wy) / cellSize;
            if (sr < 0) sr = 0;

            int sc = (clipX - wx) / cellSize;
            if (sc < 0) sc = 0;

            int er = (clipH + clipY + cellSize - wy) / cellSize;
            if (er > rows - 1) er = rows - 1;

            int ec = (clipW + clipX + cellSize - wx) / cellSize;
            if (ec > cols - 1) ec = cols - 1;

            g.setGrayScale(0);
            g.drawRect(wx, wy, ww, wh);

            for (int r = sr; r <= er; r++) {
                for (int c = sc; c <= ec; c++) {
                    int i = r * cols + c;
                    if (i >= symbolTableChars.length) {
                        break;
                    }
                    if (i == newpos) {
                        g.setGrayScale(0);
                        setCursorCoord(newpos);
                        g.fillRect(x_cursor_coord, y_cursor_coord,
                                cellSize - margin, cellSize - margin);
                        drawChar(g, symbolTableChars[i], r, c, true);
                        g.setGrayScale(255);
                        pos = newpos;
                    } else {
                        drawChar(g, symbolTableChars[i], r, c, false);
                    }

                }
            }
            g.setFont(old_font);
        }

        /**
         * Draw a character
         *
         * @param g The Graphics object to paint to
         * @param c The character to draw
         * @param row The row the character is in
         * @param col The column the character is in
         * @param reverse A flag to draw the character in inverse
         */
        void drawChar(Graphics g, char c, int row, int col, boolean reverse) {
            int y = wy + row * cellSize + hmargin;
            int x = wx + col * cellSize + wmargin;

            Font old_font = g.getFont();
            g.setFont(font);
            g.setGrayScale(reverse ? 255 : 0);
            g.drawChar(c, x, y, Graphics.HCENTER | Graphics.TOP);
            g.setFont(old_font);
        }

        /**
         * Move focus to the symbol
         * @param x x coordinate of the pointer
         * @param y y coordinate of the pointer
         */
        protected void pointerPressed(int x, int y) {
            int pressedId;
            pressedId = getIdAtPointerPosition(x, y);
            // move focus to the clicked position
            if (pressedId < symbolTableChars.length && pressedId >= 0) {
                newpos = pressedId;
                repaint();
            }
        }

        /**
         * Select the symbol by one click
         * @param x x coordinate of the pointer
         * @param y y coordinate of the pointer
         */
        protected void pointerReleased(int x, int y) {
            int pressedId;
            // select character
            pressedId = getIdAtPointerPosition(x, y);
            if (pos == pressedId) {
                new Thread(accept).start();
            }
        }

        /**
         * Helper function to determine the cell index at the x,y position
         *
         * @param x, y  pointer coordinates in this popup
         * layer's space (0,0 means left-top corner)
         *
         * @return cell id at the pointer position
         */
        private int getIdAtPointerPosition(int x, int y) {
            int ret = -1;

            int col = (x - wx) / cellSize;
            int row = (y - wy) / cellSize;

            if (col >= 0 && col < cols && row >= 0 && row < rows) {
                ret = cols * row + col;
            }
            return ret;
        }

        /**
         * Handle a key press event on this symbol table.
         * Overrides Canvas.keyPressed.
         *
         * @param keyCode The key that was pressed
         */
        protected void keyPressed(int keyCode) {

            validateState(true);
            if (mediator != null && mediator.isClearKey(keyCode)) {
                new Thread(reject).start();
            } else {
                switch (getGameAction(keyCode)) {
                case Canvas.RIGHT:
                    if ((pos + 1) < symbolTableChars.length) {
                        newpos = pos + 1;
                        setCursorCoord(pos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                        setCursorCoord(newpos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                    }
                    break;
                case Canvas.LEFT:
                    if (pos > 0) {
                        newpos = pos - 1;
                        setCursorCoord(pos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                        setCursorCoord(newpos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                    }
                    break;
                case Canvas.UP: {
                    int p = pos - cols;
                    if (p >= 0) {
                        newpos = p;
                        setCursorCoord(pos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                        setCursorCoord(newpos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                    }
                    break;
                }
                case Canvas.DOWN: {
                    int p = pos + cols;
                    if (p < symbolTableChars.length) {
                        newpos = p;
                        setCursorCoord(pos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                        setCursorCoord(newpos);
                        repaint(x_cursor_coord,y_cursor_coord,cellSize - margin,cellSize - margin);
                    }
                    break;
                }
                case Canvas.FIRE:
                    new Thread(accept).start();
                    break;
                }
            }
         }

        /**
         * Set bounds of repaint area
         * @param curr_pos - position of cursor
         */
        private void setCursorCoord(int curr_pos) {
            int row = curr_pos / cols;
            int col = curr_pos % cols;
            y_cursor_coord = wy + row * cellSize;
            x_cursor_coord = wx + col * cellSize;
        }

        /**
         * This method is used to immediately commit the given
         * string and then call the TextInputMediator's inputModeCompleted()
         * method
         * @param c command
         * @param d displayable
         */
        public void commandAction(Command c, Displayable d) {
            validateState(true);
            if (c == backCmd) {
                new Thread(reject).start();
            } else if (c == okCmd) {
                new Thread(accept).start();
            }
        }
    }

    /**
     * Complete current input mode
     * @param commit true if the symbol has to be committed otherwise false
     */
    protected void completeInputMode(boolean commit) {
        if (commit) {
            commitPendingChar();
        }
        mediator.inputModeCompleted();
    }

    /**
     * Commit pending char
     * @return true if the char has been committed otherwise false
     */
    protected boolean commitPendingChar() {
        boolean committed = false;
        if (lastKey != KEYCODE_NONE) {
            committed = true;
            mediator.commit(String.valueOf((char)lastKey));
        }
        lastKey = KEYCODE_NONE;
        return committed;
    }

    /**
     * Check if the char is the symbol from the symbol table
     * @param c char
     * @return true if this char exists in the symbol table otherwise false.
     */
    public static boolean isSymbol(char c) {
        for (int i = 0; i < symbolTableChars.length; i++) {
            if (symbolTableChars[i] == c) {
                return true;
            }
        }
        return false;
    }

    /** this mode is not set as default. So the map is initialized by false */
    private static final boolean[][] isMap =
        new boolean[TextInputSession.INPUT_SUBSETS.length + 1]
        [TextInputSession.MAX_CONSTRAINTS];

    /**
     * Returns the map specifying this input mode is proper one for the
     * particular pair of input subset and constraint. The form of the map is
     *
     *                       |ANY|EMAILADDR|NUMERIC|PHONENUMBER|URL|DECIMAL|
     * ---------------------------------------------------------------------
     * IS_FULLWIDTH_DIGITS   |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_FULLWIDTH_LATIN    |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_HALFWIDTH_KATAKANA |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_HANJA              |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_KANJI              |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_LATIN              |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_LATIN_DIGITS       |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_SIMPLIFIED_HANZI   |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * IS_TRADITIONAL_HANZI  |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * MIDP_UPPERCASE_LATIN  |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * MIDP_LOWERCASE_LATIN  |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     * NULL                  |t|f|   t|f   |  t|f  |    t|f    |t|f|  t|f  |
     *
     * @return input subset x constraint map
     */
    public boolean[][] getIsConstraintsMap() {
        return isMap;
    }
}