//////////////////////////////////////////////////////////////////////////////
// Waits until a new key is pressed, ignoring previous maintained keys
//
void wait4KeyPress () {
// Wait while previous keys are still being pressed
do { cpct_scanKeyboard(); } while ( cpct_isAnyKeyPressed() );
// Wait for a new keypress
do { cpct_scanKeyboard(); } while ( !cpct_isAnyKeyPressed() );
}
/////////////////////////////////////////////////////////////////
// checkUserInputAndPerformActions
// scans the keyboard and checks whether the user has pressed
// any action key or not. When the user presses an action key,
// the corresponding action is performed.
//
void checkUserInputAndPerformActions() {
// Scan the keyboard for user keypresses
cpct_scanKeyboard();
// Perform checks only when the user has
// pressed at least one key
if(cpct_isAnyKeyPressed()) {
// Get current (x,y) coordinates of the cursor
u8 x = cursor_getX();
u8 y = cursor_getY();
// Check if the key pressed is one of the valid keys and
// if sanity conditions are met
// CURSOR_UP or CURSOR_DOWN (Only one at a time)
// Perform required action, if the cursor is not at the
// edge of the map already.
if (cpct_isKeyPressed(Key_CursorUp) && y > 0)
cursor_move(DIR_UP);
else if (cpct_isKeyPressed(Key_CursorDown) && y < MAP_HEIGHT-1)
cursor_move(DIR_DOWN);
// CURSOR_LEFT or CURSOR_RIGHT (Only one at a time)
// Perform required action, if the cursor is not at the
// edge of the map already.
if (cpct_isKeyPressed(Key_CursorLeft) && x > 0)
cursor_move(DIR_LEFT);
else if (cpct_isKeyPressed(Key_CursorRight) && x < MAP_WIDTH-1)
cursor_move(DIR_RIGHT);
// SPACE (change tile) or ESCAPE (clear map)
// Perform one of these actions if corresponding key is pressed
if (cpct_isKeyPressed(Key_Space))
map_changeTile(x, y);
else if (cpct_isKeyPressed(Key_Esc))
map_clear();
// Always redraw the cursor after any of the above actions
cursor_draw();
}
}
