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| Keyboard Interrupting on Mouse Positions? |
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PedroNexus
Member #16,295
April 2016
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I am making a simple game using C and Allegro 5. I am currently hiding the mouse and swapping it for a custom mouse icon. The cursor icon's position is altered whenever a mouse movement is detected, then that mouse position is passed to variables mouse_x and mouse_y. What bothers me is that if, for example, I have my mouse cursor at coordinates mouse_x = 100 and mouse_y = 200, and I press any key on the keyboard, the mouse cursor is shown both on the correct mouse_x and mouse_y coordinates AND two completely random y and x variables at the same time. Once I stop holding the keyboard's key, the wrong cursor disappears. I have no clue what happens, but whenever I uninstall the keyboard using al_uninstall_keyboard(), that error is gone. This is my code: 1#include <stdio.h>
2#include <stdlib.h>
3#include <allegro5\allegro.h>
4#include <allegro5\allegro_image.h>
5#include <allegro5\allegro_primitives.h>
6#include <allegro5\allegro_audio.h>
7#include <allegro5\allegro_font.h>
8#include <allegro5\allegro_ttf.h>
9#include <allegro5\allegro_acodec.h>
10
11enum gameMode{menu, farmGame, stdend};
12enum soil{normal, wet};
13enum soil2{unplow, plow};
14enum cropType{none, tomato};
15
16typedef struct gDisp //game display
17{
18 int width;
19 int height;
20 ALLEGRO_DISPLAY *display;
21}gDisp;
22
23typedef struct fCrop //farm crop
24{
25 cropType crop;
26 ALLEGRO_TIMEOUT *waterNeed;
27 ALLEGRO_TIMEOUT *growth[4]; //Crop's growth time on all stages
28}fCrop;
29
30typedef struct fTile //farm tiles
31{
32 int xpoint;
33 int ypoint;
34 int size;
35 soil ground;
36 soil2 ground2;
37 fCrop crop;
38}fTile;
39
40int main()
41{
42 //Allegro Initialization Area
43 al_init();
44 al_init_image_addon();
45 al_init_primitives_addon();
46 al_init_font_addon();
47 al_init_ttf_addon();
48 al_init_acodec_addon();
49
50 //Allegro Installation Area
51 al_install_keyboard();
52 al_install_mouse();
53
54 //Allegro Variable Area
55 ALLEGRO_EVENT_QUEUE *queue = al_create_event_queue();
56 ALLEGRO_EVENT ev;
57 ALLEGRO_FONT *font[3];
58
59 //Allegro Variable Declaration Area
60
61 //My Enums Area
62 gameMode gamemode = menu;
63 ALLEGRO_BITMAP *bmp[30]; //20-30: Menu Bitmaps
64 ALLEGRO_BITMAP *ico;
65
66 //My Structs Area
67 gDisp disp;
68 disp = {0, 0, NULL};
69
70 //Games... Here we go!
71 if (gamemode == menu)
72 {
73 char *currgamelist[4] = { "PLAY", "TUTORIAL", "CREDITS" };
74 disp.width = 600, disp.height = 600, disp.display = al_create_display(disp.width, disp.height);
75 ico = al_load_bitmap("tomato_seedbase.png");
76 bmp[0] = al_load_bitmap("Normal-select.png");
77 bmp[1] = al_load_bitmap("Link-select.png");
78 al_set_window_title(disp.display, "Farming Hero");
79 al_set_display_icon(disp.display, ico);
80 al_hide_mouse_cursor(disp.display);
81 font[0] = al_load_font("PressStart2P.ttf", 32, 0);
82 al_clear_to_color(al_map_rgb(0, 0, 0));
83 al_register_event_source(queue, al_get_mouse_event_source());
84 al_register_event_source(queue, al_get_keyboard_event_source());
85 int mouse_x;
86 int mouse_y;
87 while (gamemode == menu)
88 {
89 al_wait_for_event(queue, &ev);
90 al_clear_to_color(al_map_rgb(0, 0, 0));
91 if (ev.type == ALLEGRO_EVENT_KEY_DOWN)
92 if (ev.keyboard.keycode == ALLEGRO_KEY_ESCAPE)
93 {
94 al_destroy_display(disp.display);
95 al_destroy_font(font[0]);
96 return 0;
97 }
98 al_draw_text(font[0], al_map_rgb(255, 255, 255), 105, 50, 0, "FARMING HERO");
99 al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 200, 0, currgamelist[0]);
100 al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 300, 0, currgamelist[1]);
101 al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 400, 0, currgamelist[2]);
102 al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 500, 0, "EXIT");
103 al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 500, 0, " ");
104 if(ev.type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN)
105 if (ev.mouse.button & 1)
106 {
107 if (ev.mouse.x >= 30 && ev.mouse.y >= 200 && ev.mouse.x <= al_get_text_width(font[0], currgamelist[0]) + 30 && ev.mouse.y <= 232)
108 gamemode = farmGame;
109 if (ev.mouse.x >= 30 && ev.mouse.y >= 300 && ev.mouse.x <= al_get_text_width(font[0], currgamelist[1]) + 30 && ev.mouse.y <= 332)
110 al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);
111 if (ev.mouse.x >= 30 && ev.mouse.y >= 400 && ev.mouse.x <= al_get_text_width(font[0], currgamelist[2]) + 30 && ev.mouse.y <= 432)
112 al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);
113 if (ev.mouse.x >= 30 && ev.mouse.y >= 500 && ev.mouse.x <= al_get_text_width(font[0], "EXIT") + 30 && ev.mouse.y <= 532)
114 al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);
115 }
116 if (ev.type == ALLEGRO_EVENT_MOUSE_AXES)
117 mouse_x = ev.mouse.x, mouse_y = ev.mouse.y;
118 if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[0]) + 30 && mouse_y >= 195 && mouse_y <= 235)
119 al_draw_text(font[0], al_map_rgb(255, 239, 0), 30, 200, 0, currgamelist[0]), al_draw_bitmap(bmp[1], mouse_x, mouse_y, 0);
120 else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[1]) + 30 && mouse_y >= 295 && mouse_y <= 335)
121 al_draw_text(font[0], al_map_rgb(255, 239, 0), 30, 300, 0, currgamelist[1]), al_draw_bitmap(bmp[1], mouse_x, mouse_y, 0);
122 else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[2]) + 30 && mouse_y >= 395 && mouse_y <= 435)
123 al_draw_text(font[0], al_map_rgb(255, 239, 0), 30, 400, 0, currgamelist[2]), al_draw_bitmap(bmp[1], mouse_x, mouse_y, 0);
124 else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], "EXIT") + 30 && mouse_y >= 495 && mouse_y <= 535)
125 al_draw_text(font[0], al_map_rgb(255, 239, 0), 30, 500, 0, "EXIT"), al_draw_bitmap(bmp[1], mouse_x, mouse_y, 0);
126 else{ al_draw_bitmap(bmp[0], mouse_x, mouse_y, 0); };
127 al_flip_display();
128 }
129 }
130 if (gamemode == farmGame)
131 {
132 ALLEGRO_TIMER *fps = al_create_timer(1.00 / 60.00);
133 font[0] = al_load_font("PressStart2P.ttf", 8, 0);
134 font[1] = al_load_font("PressStart2P.ttf", 16, 0);
135 al_register_event_source(queue, al_get_timer_event_source(fps));
136 int mouse_x, mouse_y;
137 mouse_x = -50, mouse_y = 0;
138 fCrop empty = { none, 0, 0 };
139 fTile tile[100];
140 int x_prep, y_prep; //prepare the tile's configuration
141 x_prep = 0, y_prep = 0;
142 for (int i = 0; i < 100; i++)
143 {
144 if (x_prep == 10)
145 x_prep = 0, y_prep++;
146 tile[i] = { x_prep, y_prep, 51, normal, unplow, empty};
147 x_prep++;
148 }
149 al_clear_to_color(al_map_rgb(0, 0, 0));
150 al_flip_display();
151 bmp[0] = al_load_bitmap("link-select.png");
152 bmp[1] = al_load_bitmap("ground_normal.png");
153 bmp[9] = al_create_bitmap(disp.width, disp.height);
154 bmp[30] = al_load_bitmap("tomato_seedbase.png");
155 al_uninstall_keyboard();
156 al_start_timer(fps);
157 al_set_target_bitmap(bmp[9]);
158 al_draw_filled_rectangle(512, 2, disp.width - 2, 508, al_map_rgb(150, 120, 0));
159 al_draw_filled_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(150, 120, 0));
160 al_draw_filled_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(150, 120, 0));
161 al_draw_rectangle(512, 2, disp.width - 2, 511, al_map_rgb(70, 50, 0), 5);
162 al_draw_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(70, 50, 0), 5);
163 al_draw_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(70, 50, 0), 5);
164 al_set_target_backbuffer(disp.display);
165 while (gamemode == farmGame)
166 {
167 char tileinfo[5][15];
168 al_clear_to_color(al_map_rgb(0, 0, 0));
169 al_wait_for_event(queue, &ev);
170 for (int i = 0; i < 100; i++)
171 {
172 if (tile[i].ground == normal && tile[i].ground2 == unplow)
173 al_draw_bitmap(bmp[1], tile[i].xpoint * tile[i].size, tile[i].ypoint * tile[i].size, 0);
174 if (mouse_x >= 0 && mouse_x <= 508 && mouse_y >= 0 && mouse_y <= 508)
175 if (mouse_x >= tile[i].xpoint * tile[i].size && mouse_x <= tile[i].xpoint * tile[i].size + tile[i].size && mouse_y >= tile[i].ypoint * tile[i].size && mouse_y <= tile[i].ypoint * tile[i].size + tile[i].size)
176 {
177 tile[i].crop.crop == none ? strcpy(tileinfo[1], "NONE") : 0, tile[i].crop.crop == tomato ? strcpy(tileinfo[1], "TOMATOES") : 0;
178 tile[i].ground == normal ? strcpy(tileinfo[2], "DRY") : 0, tile[i].ground == wet ? strcpy(tileinfo[2], "WET") : 0;
179 tile[i].ground2 == unplow ? strcpy(tileinfo[3], "UNPLOW") : 0, tile[i].ground2 == plow ? strcpy(tileinfo[3], "PLOW") : 0;
180 }
181 }
182 al_draw_bitmap(bmp[0], ev.mouse.x, ev.mouse.y, 0);
183 if (ev.type == ALLEGRO_EVENT_MOUSE_AXES)
184 mouse_x = ev.mouse.x, mouse_y = ev.mouse.y;
185 if (ev.type == ALLEGRO_EVENT_KEY_DOWN)
186 if (ev.keyboard.keycode == ALLEGRO_KEY_ESCAPE)
187 gamemode = stdend;
188 al_draw_bitmap(bmp[9], 0, 0, 0);
189 if (mouse_x >= 503 && mouse_x <= disp.height && mouse_y >= 10 && mouse_y <= al_get_bitmap_height(bmp[30]))
190 al_draw_tinted_bitmap(bmp[30], al_map_rgb(125, 255, 37), 503, 10, 0), al_draw_text(font[1], al_map_rgb(125, 255, 37), 525, 100, 0, "SHOP");
191 else{ al_draw_bitmap(bmp[30], 503, 10, 0), al_draw_text(font[1], al_map_rgb(255, 255, 255), 525, 100, 0, "SHOP"); }
192 if (tileinfo[1] != NULL && tileinfo[2] != NULL && tileinfo[3] != NULL)
193 {
194 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 520, 0, "%s", tileinfo[1]);
195 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 550, 0, "%s", tileinfo[2]);
196 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 580, 0, "%s", tileinfo[3]);
197 }
198 al_draw_bitmap(bmp[0], mouse_x, mouse_y, 0);
199 al_flip_display();
200 }
201 }
202 if (gamemode == stdend)
203 {
204 al_rest(2);
205 al_destroy_display(disp.display);
206 }
207 return 0;
208}
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Edgar Reynaldo
Major Reynaldo
May 2007
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If you attach a zip file of your source code and all necessary resources, I will test it for you, and see if the same thing happens for me. What version of Allegro 5 are you using? 5.2 is the latest version. Actually nevermind. I think I see what is wrong. Scroll down and look at the two highlighted lines. 1 if (gamemode == farmGame)
2 {
3 ALLEGRO_TIMER *fps = al_create_timer(1.00 / 60.00);
4 font[0] = al_load_font("PressStart2P.ttf", 8, 0);
5 font[1] = al_load_font("PressStart2P.ttf", 16, 0);
6 al_register_event_source(queue, al_get_timer_event_source(fps));
7 int mouse_x, mouse_y;
8 mouse_x = -50, mouse_y = 0;
9 fCrop empty = { none, 0, 0 };
10 fTile tile[100];
11 int x_prep, y_prep; //prepare the tile's configuration
12 x_prep = 0, y_prep = 0;
13 for (int i = 0; i < 100; i++)
14 {
15 if (x_prep == 10)
16 x_prep = 0, y_prep++;
17 tile[i] = { x_prep, y_prep, 51, normal, unplow, empty};
18 x_prep++;
19 }
20 al_clear_to_color(al_map_rgb(0, 0, 0));
21 al_flip_display();
22 bmp[0] = al_load_bitmap("link-select.png");
23 bmp[1] = al_load_bitmap("ground_normal.png");
24 bmp[9] = al_create_bitmap(disp.width, disp.height);
25 bmp[30] = al_load_bitmap("tomato_seedbase.png");
26 al_uninstall_keyboard();
27 al_start_timer(fps);
28 al_set_target_bitmap(bmp[9]);
29 al_draw_filled_rectangle(512, 2, disp.width - 2, 508, al_map_rgb(150, 120, 0));
30 al_draw_filled_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(150, 120, 0));
31 al_draw_filled_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(150, 120, 0));
32 al_draw_rectangle(512, 2, disp.width - 2, 511, al_map_rgb(70, 50, 0), 5);
33 al_draw_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(70, 50, 0), 5);
34 al_draw_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(70, 50, 0), 5);
35 al_set_target_backbuffer(disp.display);
36 while (gamemode == farmGame)
37 {
38 char tileinfo[5][15];
39 al_clear_to_color(al_map_rgb(0, 0, 0));
40 al_wait_for_event(queue, &ev);
41 for (int i = 0; i < 100; i++)
42 {
43 if (tile[i].ground == normal && tile[i].ground2 == unplow)
44 al_draw_bitmap(bmp[1], tile[i].xpoint * tile[i].size, tile[i].ypoint * tile[i].size, 0);
45 if (mouse_x >= 0 && mouse_x <= 508 && mouse_y >= 0 && mouse_y <= 508)
46 if (mouse_x >= tile[i].xpoint * tile[i].size && mouse_x <= tile[i].xpoint * tile[i].size + tile[i].size && mouse_y >= tile[i].ypoint * tile[i].size && mouse_y <= tile[i].ypoint * tile[i].size + tile[i].size)
47 {
48 tile[i].crop.crop == none ? strcpy(tileinfo[1], "NONE") : 0, tile[i].crop.crop == tomato ? strcpy(tileinfo[1], "TOMATOES") : 0;
49 tile[i].ground == normal ? strcpy(tileinfo[2], "DRY") : 0, tile[i].ground == wet ? strcpy(tileinfo[2], "WET") : 0;
50 tile[i].ground2 == unplow ? strcpy(tileinfo[3], "UNPLOW") : 0, tile[i].ground2 == plow ? strcpy(tileinfo[3], "PLOW") : 0;
51 }
52 }
54 if (ev.type == ALLEGRO_EVENT_MOUSE_AXES)
55 mouse_x = ev.mouse.x, mouse_y = ev.mouse.y;
56 if (ev.type == ALLEGRO_EVENT_KEY_DOWN)
57 if (ev.keyboard.keycode == ALLEGRO_KEY_ESCAPE)
58 gamemode = stdend;
59 al_draw_bitmap(bmp[9], 0, 0, 0);
60 if (mouse_x >= 503 && mouse_x <= disp.height && mouse_y >= 10 && mouse_y <= al_get_bitmap_height(bmp[30]))
61 al_draw_tinted_bitmap(bmp[30], al_map_rgb(125, 255, 37), 503, 10, 0), al_draw_text(font[1], al_map_rgb(125, 255, 37), 525, 100, 0, "SHOP");
62 else{ al_draw_bitmap(bmp[30], 503, 10, 0), al_draw_text(font[1], al_map_rgb(255, 255, 255), 525, 100, 0, "SHOP"); }
63 if (tileinfo[1] != NULL && tileinfo[2] != NULL && tileinfo[3] != NULL)
64 {
65 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 520, 0, "%s", tileinfo[1]);
66 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 550, 0, "%s", tileinfo[2]);
67 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 580, 0, "%s", tileinfo[3]);
68 }
70 al_flip_display();
71 }
72 }
You're drawing the mouse twice. The reason it moves when you press a key is because you are reading ev.mouse.x and ev.mouse.y from a keyboard event. You need to make sure it is a mouse event before you alter mouse_x and mouse_y. You should add in a timer, and only perform your logic when the timer ticks. Separate drawing and logic. That is part of your problem. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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