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| menu selection changing |
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bartexsz
Member #12,822
May 2011
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I have very basic problem... Can anybody give me idea for this? I thought about something whith timer but don't know exactly what to do yet. |
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William Labbett
Member #4,486
March 2004
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1int main()
2{
3
4 bool down_key_pending = false;
5 bool up_key_pending = false;
6 OneRun OneRunObject = OneRun();
7
8 if( OneRunObject.InitOkay() == false)
9 {
10 game_log(MAIN_LOG, "Problem initialising game.\n");
11 pause_and_quit
12 }
13
14
15
16 Menu MainMenu("main_menu_bitmap_list.txt", "game_data/menu_bitmaps");
17
18 Menu *CurrentMenu;
19 int cm_id = MAIN_MENU; /* current menu identifier */
20
21 bool need_redraw = false;
22
23 bool hold_on_key_down_events = false;
24
25 int update_done = 0;
26
27 int time_of_key_down;
28
29 while( OneRunObject.ClearUpAndQuit() == false)
30 {
31 switch(cm_id)
32 {
33 case MAIN_MENU:
34 CurrentMenu = &MainMenu;
35 break;
36 }
37
38 al_wait_for_event(OneRunObject.q, &OneRunObject.event);
39 switch(OneRunObject.event.type)
40 {
41 case ALLEGRO_EVENT_DISPLAY_CLOSE:
42 OneRunObject.SetClearUpAndQuitFlag();
43 CurrentMenu->SetNeedToActFlag();
44 break;
45 case ALLEGRO_EVENT_KEY_DOWN:
46
47 if(hold_on_key_down_events == false)
48 {
49 OneRunObject.SetKeyState(ALLEGRO_EVENT_KEY_DOWN);
50
51 }
52
53 break;
54 case ALLEGRO_EVENT_KEY_UP:
55 OneRunObject.SetKeyState(ALLEGRO_EVENT_KEY_UP);
56 break;
57 case ALLEGRO_EVENT_TIMER:
58
59 need_redraw = true;
60
61 if(hold_on_key_down_events == false)
62 {
63 update_done = CurrentMenu->Update(OneRunObject.key_states);
64 }
65
66 if(update_done == 1 && hold_on_key_down_events == false) /* key down processed */
67 {
68 hold_on_key_down_events = true;
69 time_of_key_down = al_get_timer_count(OneRunObject.timer);
70 }
71 else if(update_done == 2) /* Enter key pressed. */
72 {
73 if(cm_id == MAIN_MENU)
74 {
75 switch(CurrentMenu->OptionSelected())
76 {
77 case 0: /* Play. */
78 OneRunObject.time_to_play = true;
79 break;
80 }
81 }
82
83
84 }
85
86 if(hold_on_key_down_events == true && *** al_get_timer_count(OneRunObject.timer) >= time_of_key_down + 20) 87 {
88 hold_on_key_down_events = false;
89 }
90
91 break;
92 }
93
94
95
96 if(need_redraw == true && al_event_queue_is_empty(OneRunObject.q))
97 {
98 CurrentMenu->DrawMenu();
99 }
100
101
102
103
104 if(OneRunObject.time_to_play == true)
105 {
106 /* if a loaded game was chosen, it should already be loaded */
107
108 printf("start game here.\n");
109 pause_and_quit(1);
110 }
111
112
113 al_flip_display();
114
115 }
116
117
118
119 game_log(MAIN_LOG, "End of program. Returning 0.\n");
120 return 0;
121}
Notice how the hold_on_key_down_events gets changed back to false after 20 ticks have passed since the last time a key down event was recieved. Perhaps you can make sense of this. I need to add another line so that 2 or more quick taps of a key all get processed. /* EDIT : */ if(update_done == 1 && hold_on_key_down_events == false) /* key down processed */ { hold_on_key_down_events = true; time_of_key_down = al_get_timer_count(OneRunObject.timer); } This bit sees if an update was done, ie the item selected changed, and then sets hold_on_key_down_events to true. This is to stop further key down events from being processed until 20 ticks have passed. /* EDIT *? Also : crucially : if(hold_on_key_down_events == false) { OneRunObject.SetKeyState(ALLEGRO_EVENT_KEY_DOWN); } this bit only changes the key states if hold_on_key_down_events is false, so if a ALLEGRO_EVENT_KEY_DOWN event resulted in a key state being down, it'll stay as down, even though there's a key up event. Also : look at this : 1#ifndef ONERUN_GUARD
2#define ONERUN_GUARD
3
4#include "globals.h" /* for UP_KEY, RIGHT_KEY, etc... */
5
6#include "Game.h"
7
8
9
10
11
12class OneRun {
13
14 ALLEGRO_CONFIG *config_file_ptr;
15
16 int InitialiseDisplay(int fullscreen);
17 int InitialiseLog(void);
18
19
20
21
22 int start_fullscreen;
23 int show_fps;
24
25 enum MenuResult { CLEAR_UP_AND_QUIT };
26
27
28 MenuResult menu_result;
29
30
31 Game *OneGame;
32
33 bool init_okay;
34
35
36
37
38
39
40 bool clear_up_and_quit;
41
42 public:
43
44 bool time_to_play;
45
46 ALLEGRO_EVENT_SOURCE *menu_enter_button_es;
47
48 ALLEGRO_EVENT_QUEUE *q;
49 ALLEGRO_EVENT event;
50 ALLEGRO_TIMER *timer;
51
52 int include_menu;
53 bool key_states[5];
54
55 OneRun();
56
57 int RunMenu( );
58
59 void ActOnMenuResult();
60
61 bool ClearUpAndQuit() { return clear_up_and_quit; }
62
63 void SetClearUpAndQuitFlag() { clear_up_and_quit = true; };
64
65 bool InitOkay() { return init_okay; }
66
67
68
69 void SetKeyState(int up_or_down)
70 {
71 switch(this->event.keyboard.keycode) {
72 case ALLEGRO_KEY_UP:
73 this->key_states[UP_KEY] = up_or_down == ALLEGRO_EVENT_KEY_DOWN ? true : false;
74 break;
75 case ALLEGRO_KEY_RIGHT:
76 this->key_states[RIGHT_KEY] = up_or_down == ALLEGRO_EVENT_KEY_DOWN ? true : false;
77 break;
78 case ALLEGRO_KEY_DOWN:
79 this->key_states[DOWN_KEY] = up_or_down == ALLEGRO_EVENT_KEY_DOWN ? true : false;
80 break;
81 case ALLEGRO_KEY_LEFT:
82 this->key_states[LEFT_KEY] = up_or_down == ALLEGRO_EVENT_KEY_DOWN ? true : false;
83 break;
84 case ALLEGRO_KEY_ENTER:
85 this->key_states[ENTER_KEY] = up_or_down == ALLEGRO_EVENT_KEY_DOWN ? true : false;
86 break;
87 default:
88 break;
89 }
90 }
91};
92
93
94#endif
Sorry if this is too complex.
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