55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
#include <keyboard.h>
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#include <internals/keyboard.h>
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#include <events.h>
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/*
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multigetkey()
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Listens the keyboard for simultaneous key hits. Uses the same options
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as getkey_opt().
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multigetkey() fills the 'keys' array with 'count' key codes, adding
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KEY_NOKEY if less than 'count' keys are pressed.
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Be aware that rectangle and column effects can make multigetkey() read
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unpressed keys as pressed (see documentation for more information).
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Setting count = 3 is generally safe.
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The function returns after 'max_cycles' if no key is pressed.
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*/
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static void multigetkey_wait(int *cycles)
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{
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while(!interrupt_flag) sleep();
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interrupt_flag = 0;
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if(*cycles > 0) (*cycles)--;
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}
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void multigetkey(int *keys, int count, int cycles)
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{
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event_t event;
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int number = 0;
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if(count <= 0) return;
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if(cycles <= 0) cycles = -1;
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while(cycles != 0)
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{
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number = getPressedKeys(keyboard_state, keys, count);
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// We want to update the last key data when multigetkey()
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// returns a single key, because getkey() could be called a
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// short time after we return, and send a new event for this
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// key.
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if(number == 1)
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{
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last_key = keys[0];
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last_repeats = 0;
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last_time = 0;
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}
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if(number) break;
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multigetkey_wait(&cycles);
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}
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do event = pollevent();
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while(event.type != event_none);
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return;
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}
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