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POreplacing switch by multiple if on curses
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Id
19613104
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AcceptedAnswerId
19613255
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1
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CommentCount
6
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CreationDate
2013-10-26T23:37:50.720
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0
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2013-10-27T00:01:52.333
LastEditDate
2013-10-26T23:44:20.433
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1616622
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text
Body
<p>Im learning curses library by tutorials and Ive replaced a switch statement by multiple if (the switch part is still on commentary) on a curses tutorial because I better understand with if statement My problem is that now each time I press a key, the previous entered key is used before the new one, whats wrong ?</p> <pre><code>int main(int argc, char *argv[]) {WINDOW *my_win; int startx, starty, width, height; int ch; initscr();/* Start curses mode */ cbreak();/* Line buffering disabled, Pass on * everty thing to me */ keypad(stdscr, TRUE);/* I need that nifty F1 */ height = 3; width = 12; starty = (LINES - height) / 2;/* Calculating for a center placement */ startx = (COLS - width) / 2;/* of the window*/ printw("Press F1 to exit"); refresh(); my_win = create_newwin(height, width, starty, startx); /* while((ch = getch()) != KEY_F(1)) {switch(ch) {case KEY_LEFT: destroy_win(my_win); my_win = create_newwin(height, width, starty,--startx); break; case KEY_RIGHT: destroy_win(my_win); my_win = create_newwin(height, width, starty,++startx); break; case KEY_UP: destroy_win(my_win); my_win = create_newwin(height, width, --starty,startx); break; case KEY_DOWN: destroy_win(my_win); my_win = create_newwin(height, width, ++starty,startx); break; } } */ while(42) { ch = getch(); if(ch == KEY_LEFT) { destroy_win(my_win); my_win = create_newwin(height, width, starty,startx--); } else if(ch == KEY_RIGHT) { destroy_win(my_win); my_win = create_newwin(height, width, starty,startx++); } else if(ch == KEY_UP) { destroy_win(my_win); my_win = create_newwin(height, width, starty--,startx); } else if(ch == KEY_DOWN) { destroy_win(my_win); my_win = create_newwin(height, width, starty++, startx); } else { endwin(); exit(0); } } endwin();/* End curses mode */ return 0; } WINDOW *create_newwin(int height, int width, int starty, int startx) {WINDOW *local_win; local_win = newwin(height, width, starty, startx); box(local_win, 0 , 0);/* 0, 0 gives default characters * for the vertical and horizontal * lines*/ wrefresh(local_win);/* Show that box */ return local_win; } void destroy_win(WINDOW *local_win) { /* box(local_win, ' ', ' '); : This won't produce the desired * result of erasing the window. It will leave it's four corners * and so an ugly remnant of window. */ wborder(local_win, ' ', ' ', ' ',' ',' ',' ',' ',' '); /* The parameters taken are * 1. win: the window on which to operate * 2. ls: character to be used for the left side of the window * 3. rs: character to be used for the right side of the window * 4. ts: character to be used for the top side of the window * 5. bs: character to be used for the bottom side of the window * 6. tl: character to be used for the top left corner of the window * 7. tr: character to be used for the top right corner of the window * 8. bl: character to be used for the bottom left corner of the window * 9. br: character to be used for the bottom right corner of the window */ wrefresh(local_win); delwin(local_win); } </code></pre>
Tags
<c><unix><curses>
Title
replacing switch by multiple if on curses
singulars
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1. PO
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1. PTQuestion
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1. USSaxtheowl
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1. USSaxtheowl
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