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@ -35,81 +35,51 @@ extern game_descriptor_t _game_descriptors_end__[]; |
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#define MENU_NEXTITEM(item) ((item + 1) % MENU_ITEM_MAX) |
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#define MENU_NEXTITEM(item) ((item + 1) % MENU_ITEM_MAX) |
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#define MENU_PREVITEM(item) ((item + MENU_ITEM_MAX - 1) % MENU_ITEM_MAX) |
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#define MENU_PREVITEM(item) ((item + MENU_ITEM_MAX - 1) % MENU_ITEM_MAX) |
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void menu() |
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typedef enum menu_direction_t |
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{ |
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{ |
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if (MENU_ITEM_MAX != 0) |
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MENU_DIRECTION_LEFT, |
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{ |
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MENU_DIRECTION_RIGHT, |
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// don't let WAIT() query fire button to prevent endless circular jumps
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MENU_DIRECTION_STILL |
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waitForFire = 0; |
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} |
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menu_direction_t; |
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clear_screen(0); |
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// wait as long as "fire" is pressed to prevent unwanted selections
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static void menu_setpixel(uint8_t x, uint8_t y, uint8_t isSet) |
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while (JOYISFIRE) |
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{ |
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{ |
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uint8_t nColor; |
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wait(MENU_POLL_INTERVAL); |
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} |
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// set initial menu item
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static uint8_t miSelection = 0; |
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// scroll in currently selected menu item
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menu_animate(MENU_PREVITEM(miSelection), MENU_DIRECTION_LEFT); |
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uint16_t nMenuIterations= MENU_TIMEOUT_ITERATIONS; |
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// mirror mirror on the wall, what's the quirkiest API of them all...
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x = NUM_COLS - 1 - x; |
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uint8_t nMiddle = (NUM_COLS - MENU_WIDTH_ICON) / 2; |
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while (1) |
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if (isSet != 0) |
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{ |
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if ((x >= nMiddle - MENU_WIDTH_DELIMITER) && (x < (nMiddle |
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+ MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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{ |
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{ |
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// the user has made her/his choice
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nColor = 3; |
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if (JOYISFIRE) |
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} |
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{ |
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else if ((x == (nMiddle - MENU_WIDTH_DELIMITER - 1)) || (x == (nMiddle |
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// prevent unwanted selections
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+ MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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while (JOYISFIRE) |
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{ |
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{ |
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nColor = 2; |
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wait(MENU_POLL_INTERVAL); |
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} |
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} |
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else |
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// work against the chatter effects of dump joysticks
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{ |
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wait(MENU_WAIT_CHATTER); |
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nColor = 1; |
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// call corresponding function
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_game_descriptors_start__[miSelection].run(); |
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break; |
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} |
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// change selected item and do some scrolling
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else if (JOYISRIGHT) |
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{ |
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menu_animate(miSelection, MENU_DIRECTION_LEFT); |
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miSelection = MENU_NEXTITEM(miSelection); |
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nMenuIterations = MENU_TIMEOUT_ITERATIONS; |
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} |
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else if (JOYISLEFT) |
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{ |
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menu_animate(miSelection, MENU_DIRECTION_RIGHT); |
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miSelection = MENU_PREVITEM(miSelection); |
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nMenuIterations = MENU_TIMEOUT_ITERATIONS; |
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} |
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// exit menu
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else if (JOYISUP) |
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{ |
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break; |
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} |
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// return if timeout is reached
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else |
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{ |
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wait(MENU_POLL_INTERVAL); |
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if (--nMenuIterations == 0) |
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break; |
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} |
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} |
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} |
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waitForFire = 1; |
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} |
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} |
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return; |
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else |
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{ |
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nColor = 0; |
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} |
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setpixel((pixel){x, y}, nColor); |
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} |
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} |
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uint8_t menu_getIconPixel(uint8_t item, int8_t x, int8_t y) |
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static uint8_t menu_getIconPixel(uint8_t item, uint8_t x, uint8_t y) |
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{ |
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{ |
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// is x within the icon or do we have reached the delimiter?
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// is x within the icon or do we have reached the delimiter?
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if (x < MENU_WIDTH_ICON) |
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if (x < MENU_WIDTH_ICON) |
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@ -125,16 +95,17 @@ uint8_t menu_getIconPixel(uint8_t item, int8_t x, int8_t y) |
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} |
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} |
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} |
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} |
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void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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static void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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{ |
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{ |
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int16_t nWait= MENU_WAIT_INITIAL; |
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int16_t nWait = MENU_WAIT_INITIAL; |
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// space between left border and the icon in the middle
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// space between left border and the icon in the middle
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int8_t nWidthSide = (NUM_COLS - MENU_WIDTH_ICON) / 2; |
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uint8_t nWidthSide = (NUM_COLS - MENU_WIDTH_ICON) / 2; |
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// determine the icon at the leftmost position
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// determine the icon at the leftmost position
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uint8_t mi = miInitial + MENU_ITEM_MAX; |
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uint8_t mi = miInitial + MENU_ITEM_MAX; |
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int8_t nBack = nWidthSide / (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER); |
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uint8_t nBack = nWidthSide / (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER); |
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if ((nWidthSide % (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER)) != 0) |
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if ((nWidthSide % (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER)) != 0) |
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{ |
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{ |
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++nBack; |
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++nBack; |
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@ -142,7 +113,7 @@ void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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mi = (mi + MENU_ITEM_MAX - (nBack % MENU_ITEM_MAX)) % MENU_ITEM_MAX; |
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mi = (mi + MENU_ITEM_MAX - (nBack % MENU_ITEM_MAX)) % MENU_ITEM_MAX; |
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// start and stop offsets for the scrolling icons (both are 0 for stills)
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// start and stop offsets for the scrolling icons (both are 0 for stills)
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int8_t nStart, nStop; |
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uint8_t nStart, nStop; |
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if (direction == MENU_DIRECTION_STILL) |
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if (direction == MENU_DIRECTION_STILL) |
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{ |
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{ |
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nStart = 0; |
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nStart = 0; |
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@ -155,41 +126,33 @@ void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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} |
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} |
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// draw menu screen for each offset within the nStart/nStop range
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// draw menu screen for each offset within the nStart/nStop range
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int8_t i; |
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uint8_t i; |
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for (i = nStart; i <= nStop; ++i) |
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for (i = nStart; i <= nStop; ++i) |
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{ |
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{ |
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int8_t nOffset; |
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if (direction == MENU_DIRECTION_LEFT) |
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nOffset = i; |
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else |
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nOffset = -i; |
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// offset of the left most icon if it is cut by the left border
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// offset of the left most icon if it is cut by the left border
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int8_t nInitialSideOffset = (((MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER) |
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uint8_t nInitialSideOffset = (((MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER) |
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- (nWidthSide % (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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- (nWidthSide % (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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+ nOffset + (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER)) |
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+ (direction == MENU_DIRECTION_LEFT ? i : -i) |
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+ (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER)) |
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% (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER); |
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% (MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER); |
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// an initial side offset of 0 means the leftmost icon was changed
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// an initial side offset of 0 means the leftmost icon was changed
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// if we are scrolling to the left, increment value for leftmost item
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// if we are scrolling to the left, increment value for leftmost item
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if (direction == MENU_DIRECTION_LEFT) |
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if (direction == MENU_DIRECTION_LEFT && nInitialSideOffset == 0) |
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{ |
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{ |
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if (nInitialSideOffset == 0) |
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mi = MENU_NEXTITEM(mi); |
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{ |
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mi = MENU_NEXTITEM(mi); |
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} |
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} |
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} |
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// draw the icons from the leftmost position (line by line)
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// draw the icons from the leftmost position (line by line)
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int8_t y; |
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uint8_t y; |
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for (y = 0; y < MENU_HEIGHT_ICON; ++y) |
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for (y = 0; y < MENU_HEIGHT_ICON; ++y) |
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{ |
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{ |
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uint8_t miCurrent = mi; |
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uint8_t miCurrent = mi; |
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int8_t nIconOffset = nInitialSideOffset; |
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uint8_t nIconOffset = nInitialSideOffset; |
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int8_t x; |
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uint8_t x; |
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for (x = 0; x < NUM_COLS; ++x) |
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for (x = 0; x < NUM_COLS; ++x) |
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{ |
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{ |
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int8_t nPixel = menu_getIconPixel(miCurrent, nIconOffset, y); |
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uint8_t nPixel = menu_getIconPixel(miCurrent, nIconOffset, y); |
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menu_setpixel(x, ((NUM_ROWS - MENU_HEIGHT_ICON) / 2) + y, |
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menu_setpixel(x, ((NUM_ROWS - MENU_HEIGHT_ICON) / 2) + y, |
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nPixel); |
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nPixel); |
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@ -203,12 +166,9 @@ void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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// an initial side offset of 0 means the leftmost icon was changed
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// an initial side offset of 0 means the leftmost icon was changed
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// if we are scrolling to the right, decrement value for leftmost item
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// if we are scrolling to the right, decrement value for leftmost item
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if (direction == MENU_DIRECTION_RIGHT) |
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if (direction == MENU_DIRECTION_RIGHT && nInitialSideOffset == 0) |
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{ |
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{ |
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if (nInitialSideOffset == 0) |
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mi = MENU_PREVITEM(mi); |
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{ |
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mi = MENU_PREVITEM(mi); |
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} |
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} |
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} |
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// wait between the frames so that the animation can be seen
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// wait between the frames so that the animation can be seen
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@ -218,36 +178,76 @@ void menu_animate(uint8_t miInitial, menu_direction_t direction) |
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} |
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} |
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} |
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} |
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void menu_setpixel(int8_t x, int8_t y, int8_t isSet) |
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void menu() |
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{ |
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{ |
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uint8_t nColor; |
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if (MENU_ITEM_MAX != 0) |
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{ |
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// don't let WAIT() query fire button to prevent endless circular jumps
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waitForFire = 0; |
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// mirror mirror on the wall, what's the quirkiest API of them all...
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clear_screen(0); |
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x = NUM_COLS - 1 - x; |
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uint8_t nMiddle = (NUM_COLS - MENU_WIDTH_ICON) / 2; |
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if (isSet != 0) |
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// wait as long as "fire" is pressed to prevent unwanted selections
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{ |
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while (JOYISFIRE) |
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if ((x >= nMiddle - MENU_WIDTH_DELIMITER) && (x < (nMiddle |
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+ MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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{ |
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nColor = 3; |
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} |
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else if ((x == (nMiddle - MENU_WIDTH_DELIMITER - 1)) || (x == (nMiddle |
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+ MENU_WIDTH_ICON + MENU_WIDTH_DELIMITER))) |
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{ |
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{ |
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nColor = 2; |
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wait(MENU_POLL_INTERVAL); |
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} |
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} |
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else |
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// set initial menu item
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static uint8_t miSelection = 0; |
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// scroll in currently selected menu item
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menu_animate(MENU_PREVITEM(miSelection), MENU_DIRECTION_LEFT); |
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uint16_t nMenuIterations= MENU_TIMEOUT_ITERATIONS; |
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while (1) |
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{ |
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{ |
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nColor = 1; |
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// the user has made her/his choice
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if (JOYISFIRE) |
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{ |
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// prevent unwanted selections
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while (JOYISFIRE) |
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{ |
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wait(MENU_POLL_INTERVAL); |
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} |
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// work against the chatter effects of dump joysticks
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wait(MENU_WAIT_CHATTER); |
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// call corresponding function
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_game_descriptors_start__[miSelection].run(); |
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break; |
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} |
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// change selected item and do some scrolling
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else if (JOYISRIGHT) |
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{ |
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menu_animate(miSelection, MENU_DIRECTION_LEFT); |
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miSelection = MENU_NEXTITEM(miSelection); |
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nMenuIterations = MENU_TIMEOUT_ITERATIONS; |
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} |
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else if (JOYISLEFT) |
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{ |
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menu_animate(miSelection, MENU_DIRECTION_RIGHT); |
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miSelection = MENU_PREVITEM(miSelection); |
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nMenuIterations = MENU_TIMEOUT_ITERATIONS; |
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} |
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// exit menu
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else if (JOYISUP) |
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{ |
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break; |
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} |
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// return if timeout is reached
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else |
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{ |
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wait(MENU_POLL_INTERVAL); |
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if (--nMenuIterations == 0) |
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break; |
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} |
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} |
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} |
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} |
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else |
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{ |
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nColor = 0; |
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} |
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setpixel((pixel){x, y}, nColor); |
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waitForFire = 1; |
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} |
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return; |
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} |
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} |
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Christian Kroll
14 years ago