c - Allegro 5 Keyboard Interfering on Mouse Position? -

i making simple game using c , allegro 5. hiding mouse , swapping custom mouse icon. cursor icon's position altered whenever mouse movement detected.

what bothers me if, example, have mouse cursor @ coordinates mouse_x = 100 , mouse_y = 200, , press key on keyboard, mouse cursor teleported coordinates mouse_x = 0 , mouse_y = 0 while key being pressed.

i have no clue happens, whenever uninstall keyboard using al_uninstall_keyboard(), error gone.

this code:

#include <stdio.h> #include <stdlib.h> #include <allegro5\allegro.h> #include <allegro5\allegro_image.h> #include <allegro5\allegro_primitives.h> #include <allegro5\allegro_audio.h> #include <allegro5\allegro_font.h> #include <allegro5\allegro_ttf.h> #include <allegro5\allegro_acodec.h>  enum gamemode{menu, farmgame, stdend}; enum soil{normal, wet}; enum soil2{unplow, plow}; enum croptype{none, tomato};  typedef struct gdisp //game display {     int width;     int height;     allegro_display *display; }gdisp;  typedef struct fcrop //farm crop {     croptype crop;     allegro_timeout *waterneed;     allegro_timeout *growth[4]; //crop's growth time on stages }fcrop;  typedef struct ftile //farm tiles {     int xpoint;     int ypoint;     int size;     soil ground;     soil2 ground2;     fcrop crop; }ftile;  int main() {     //allegro initialization area     al_init();     al_init_image_addon();     al_init_primitives_addon();     al_init_font_addon();     al_init_ttf_addon();     al_init_acodec_addon();      //allegro installation area     al_install_keyboard();     al_install_mouse();      //allegro variable area     allegro_event_queue *queue = al_create_event_queue();     allegro_event ev;     allegro_font *font[3];      //allegro variable declaration area      //my enums area     gamemode gamemode = menu;     allegro_bitmap *bmp[30]; //20-30: menu bitmaps     allegro_bitmap *ico;      //my structs area     gdisp disp;     disp = {0, 0, null};      //games... here go!     if (gamemode == menu)     {         char *currgamelist[4] = { "play", "tutorial", "credits" };         disp.width = 600, disp.height = 600, disp.display = al_create_display(disp.width, disp.height);         ico = al_load_bitmap("tomato_seedbase.png");         bmp[0] = al_load_bitmap("normal-select.png");         bmp[1] = al_load_bitmap("link-select.png");         al_set_window_title(disp.display, "farming hero");         al_set_display_icon(disp.display, ico);         al_hide_mouse_cursor(disp.display);         font[0] = al_load_font("pressstart2p.ttf", 32, 0);         al_clear_to_color(al_map_rgb(0, 0, 0));         al_register_event_source(queue, al_get_mouse_event_source());         al_register_event_source(queue, al_get_keyboard_event_source());         int mouse_x;         int mouse_y;         while (gamemode == menu)         {             al_wait_for_event(queue, &ev);             al_clear_to_color(al_map_rgb(0, 0, 0));             if (ev.type == allegro_event_key_down)                 if (ev.keyboard.keycode == allegro_key_escape)                 {                     al_destroy_display(disp.display);                     al_destroy_font(font[0]);                     return 0;                 }             al_draw_text(font[0], al_map_rgb(255, 255, 255), 105, 50, 0, "farming hero");             al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 200, 0, currgamelist[0]);             al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 300, 0, currgamelist[1]);             al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 400, 0, currgamelist[2]);             al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 500, 0, "exit");             al_draw_text(font[0], al_map_rgb(255, 255, 255), 30, 500, 0, " ");             if(ev.type == allegro_event_mouse_button_down)                 if (ev.mouse.button & 1)                 {                     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)                         gamemode = farmgame;                     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)                         al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);                     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)                         al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);                     if (ev.mouse.x >= 30 && ev.mouse.y >= 500 && ev.mouse.x <= al_get_text_width(font[0], "exit") + 30 && ev.mouse.y <= 532)                         al_destroy_display(disp.display), al_destroy_font(font[0]), exit(0);                 }             if (ev.type == allegro_event_mouse_axes)                 mouse_x = ev.mouse.x, mouse_y = ev.mouse.y;             if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[0]) + 30 && mouse_y >= 195 && mouse_y <= 235)                 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);             else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[1]) + 30 && mouse_y >= 295 && mouse_y <= 335)                 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);             else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], currgamelist[2]) + 30 && mouse_y >= 395 && mouse_y <= 435)                 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);             else if (mouse_x >= 30 && mouse_x <= al_get_text_width(font[0], "exit") + 30 && mouse_y >= 495 && mouse_y <= 535)                 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);             else{ al_draw_bitmap(bmp[0], mouse_x, mouse_y, 0); };             al_flip_display();         }     }     if (gamemode == farmgame)     {         allegro_timer *fps = al_create_timer(1.00 / 60.00);         font[0] = al_load_font("pressstart2p.ttf", 8, 0);         font[1] = al_load_font("pressstart2p.ttf", 16, 0);         al_register_event_source(queue, al_get_timer_event_source(fps));         int mouse_x, mouse_y;         mouse_x = -50, mouse_y = 0;         fcrop empty = { none, 0, 0 };         ftile tile[100];         int x_prep, y_prep; //prepare tile's configuration         x_prep = 0, y_prep = 0;         (int = 0; < 100; i++)         {             if (x_prep == 10)                 x_prep = 0, y_prep++;             tile[i] = { x_prep, y_prep, 51, normal, unplow, empty};             x_prep++;         }         al_clear_to_color(al_map_rgb(0, 0, 0));         al_flip_display();         bmp[0] = al_load_bitmap("link-select.png");         bmp[1] = al_load_bitmap("ground_normal.png");         bmp[9] = al_create_bitmap(disp.width, disp.height);         bmp[30] = al_load_bitmap("tomato_seedbase.png");         al_uninstall_keyboard();         al_start_timer(fps);         al_set_target_bitmap(bmp[9]);         al_draw_filled_rectangle(512, 2, disp.width - 2, 508, al_map_rgb(150, 120, 0));         al_draw_filled_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(150, 120, 0));         al_draw_filled_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(150, 120, 0));         al_draw_rectangle(512, 2, disp.width - 2, 511, al_map_rgb(70, 50, 0), 5);         al_draw_rectangle(2, 512, 512, disp.height - 2, al_map_rgb(70, 50, 0), 5);         al_draw_rectangle(512, 512, disp.width - 2, disp.height - 2, al_map_rgb(70, 50, 0), 5);         al_set_target_backbuffer(disp.display);         while (gamemode == farmgame)         {             char tileinfo[5][15];             al_clear_to_color(al_map_rgb(0, 0, 0));             al_wait_for_event(queue, &ev);             (int = 0; < 100; i++)             {                 if (tile[i].ground == normal && tile[i].ground2 == unplow)                     al_draw_bitmap(bmp[1], tile[i].xpoint * tile[i].size, tile[i].ypoint * tile[i].size, 0);                 if (mouse_x >= 0 && mouse_x <= 508 && mouse_y >= 0 && mouse_y <= 508)                     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)                     {                         tile[i].crop.crop == none ? strcpy(tileinfo[1], "none") : 0, tile[i].crop.crop == tomato ? strcpy(tileinfo[1], "tomatoes") : 0;                         tile[i].ground == normal ? strcpy(tileinfo[2], "dry") : 0, tile[i].ground == wet ? strcpy(tileinfo[2], "wet") : 0;                         tile[i].ground2 == unplow ? strcpy(tileinfo[3], "unplow") : 0, tile[i].ground2 == plow ? strcpy(tileinfo[3], "plow") : 0;                     }             }             al_draw_bitmap(bmp[0], ev.mouse.x, ev.mouse.y, 0);             if (ev.type == allegro_event_mouse_axes)                 mouse_x = ev.mouse.x, mouse_y = ev.mouse.y;             if (ev.type == allegro_event_key_down)                 if (ev.keyboard.keycode == allegro_key_escape)                     gamemode = stdend;             al_draw_bitmap(bmp[9], 0, 0, 0);             if (mouse_x >= 503 && mouse_x <= disp.height && mouse_y >= 10 && mouse_y <= al_get_bitmap_height(bmp[30]))                 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");             else{ al_draw_bitmap(bmp[30], 503, 10, 0), al_draw_text(font[1], al_map_rgb(255, 255, 255), 525, 100, 0, "shop"); }             if (tileinfo[1] != null && tileinfo[2] != null && tileinfo[3] != null)             {                 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 520, 0, "%s", tileinfo[1]);                 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 550, 0, "%s", tileinfo[2]);                 al_draw_textf(font[0], al_map_rgb(255, 255, 255), 520, 580, 0, "%s", tileinfo[3]);             }             al_draw_bitmap(bmp[0], mouse_x, mouse_y, 0);             al_flip_display();         }     }     if (gamemode == stdend)     {         al_rest(2);         al_destroy_display(disp.display);     }     return 0; } 

you never initialized mouse_x , mouse_y before loop. means random value, they'd 0. when press key, loop proceeds , mouse cursor drawn @ bottom of loop @ (0, 0). can initialize them proper value al_get_mouse_state.