Hello.
I decided to learn some programming in Allegro so I tried to write some elements from a tutorial. And now I have odd problem with my application, here is the code:
1#pragma once
2#include <stdio.h>
3#include "allegro5/allegro_primitives.h"
4#include "allegro5/allegro_font.h"
5#include "allegro5/allegro_ttf.h"
6
7
8int main(int argc, char **argv)
9{
10 ALLEGRO_DISPLAY *display = NULL;
11 ALLEGRO_EVENT_QUEUE *event_queue = NULL;
12 ALLEGRO_BITMAP *bitmap = NULL;
13 ALLEGRO_FONT *font = NULL;
14 ALLEGRO_EVENT event;
15
16 if (!al_init()) {
17 fprintf(stderr, "failed to initialize allegro!\n");
18 return -1;
19 }
20 if (!al_install_keyboard()) {
21 fprintf(stderr, "failed to initialize the keyboard!\n");
22 return -1;
23 }
24 al_init_font_addon();
25 al_init_ttf_addon();
26 if (!al_install_mouse()) {
27 fprintf(stderr, "failed to initialize the mouse!\n");
28 return -1;
29 }
30 display = al_create_display(800, 600);
31 if (!display) {
32 fprintf(stderr, "failed to create display!\n");
33 return -1;
34 }
35 event_queue = al_create_event_queue();
36 if (!event_queue) {
37 fprintf(stderr, "failed to create event_queue!\n");
38 return -1;
39 }
40 font = al_load_ttf_font("Fonts/R-2014.ttf", 12, 0);
41 if (!font)
42 {
43 fprintf(stderr, "Could not load 'R-2014.ttf'.\n");
44 return -1;
45 }
46
47 al_register_event_source(event_queue, al_get_display_event_source(display));
48 al_register_event_source(event_queue, al_get_mouse_event_source());
49 al_register_event_source(event_queue, al_get_keyboard_event_source());
50
51 al_set_window_title(display, "Title!");
52
53 al_init_primitives_addon();
54 al_clear_to_color(al_map_rgb(255, 255, 255));
55 bitmap = al_create_bitmap(100, 100);
56 al_set_target_bitmap(bitmap);
57 al_clear_to_color(al_map_rgb(0, 0, 255));
58 al_set_target_bitmap(al_get_backbuffer(display));
59
60 al_flip_display();
61
62 int x = 0, y = 0;
63 int xx = 0, yy = 0;
64 unsigned long int frames = 0, cframes = 0, time1 = al_get_time(), time2 = 0;
65 //al_hide_mouse_cursor(display);
66 bool get_event;
67 for (;;)
68 {
69 get_event = al_get_next_event(event_queue, &event);
70 if (get_event)
71 {
72 if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
73 {
74 break;
75 }
76 else if (event.type == ALLEGRO_EVENT_MOUSE_AXES || ALLEGRO_EVENT_MOUSE_ENTER_DISPLAY)
77 {
78 xx = event.mouse.x;
79 yy = event.mouse.y;
80 }
81 else if (event.type == ALLEGRO_EVENT_KEY_DOWN)
82 {
83 switch (event.keyboard.keycode)
84 {
85 case ALLEGRO_KEY_UP: --y; break;
86 case ALLEGRO_KEY_DOWN: ++y; break;
87 case ALLEGRO_KEY_LEFT: --x; break;
88 case ALLEGRO_KEY_RIGHT: ++x; break;
89 }
90 if (x > 800) x = -100;
91 if (x < -100) x = 800;
92 if (y > 600) y = -100;
93 if (y < -100) y = 600;
94 }
95 }
96 ++frames;
97
98 time2 = al_get_time();
99 if (time2 != time1)
100 {
101 time1 = time2;
102 printf("%d\n", frames);
103 cframes = frames;
104 frames = 0;
105 }
106
107 if (al_is_event_queue_empty(event_queue))
108 {
109 al_clear_to_color(al_map_rgb(0, 0, 0));
110 al_set_target_bitmap(bitmap);
111 al_clear_to_color(al_map_rgb(255, 0, 0));
112 al_set_target_bitmap(al_get_backbuffer(display));
113 al_draw_bitmap(bitmap, x, y, 0);
114
115 al_draw_filled_ellipse(xx, yy, 5, 5, al_map_rgba(0, 255, 255, 255));
116
117 al_draw_textf(font, al_map_rgb(255, 255, 255), 0, 0, 0, "%d", cframes);
118 al_flip_display();
119 }
120 }
121
122 al_destroy_display(display);
123 al_destroy_event_queue(event_queue);
124 al_destroy_bitmap(bitmap);
125 return 0;
126}
I have problem with events, when I press arrows, a square doesn't move and a circle under mouse cursor 'teleports' to upper left corner, and I absolutely don't know why. Here is a video of the problem:
When I swap a part of code...:
1 //...
2 else if (event.type == ALLEGRO_EVENT_KEY_DOWN)
3 {
4 switch (event.keyboard.keycode)
5 {
6 case ALLEGRO_KEY_UP: --y; break;
7 case ALLEGRO_KEY_DOWN: ++y; break;
8 case ALLEGRO_KEY_LEFT: --x; break;
9 case ALLEGRO_KEY_RIGHT: ++x; break;
10 }
11 if (x > 800) x = -100;
12 if (x < -100) x = 800;
13 if (y > 600) y = -100;
14 if (y < -100) y = 600;
15 }
16
17 else if (event.type == ALLEGRO_EVENT_MOUSE_AXES || ALLEGRO_EVENT_MOUSE_ENTER_DISPLAY)
18 {
19 xx = event.mouse.x;
20 yy = event.mouse.y;
21 }
22 //...
... the square moves, but the circle still teleports:
What am I doing wrong 
Please help.
I add that I don't want to limit fps, so the program should gets events in every frame.
And sorry if there is any language mistakes, but my english is very bad 
.
