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| [A5] Mouse cursor changig when holding down mouse button problem |
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mickwa
Member #13,928
January 2012
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Hi, I want to change mouse cursor on press and release mouse button events. When I press and hold mouse button, ALLEGRO_EVENT_MOUSE_BUTTON_DOWN event occurres, I get "grab cursor set" message in console, but cursor remains unchanged until I release the button. I don't know why it works like that, I expected that the cursor will change when I press and hold button. Am I missing something? Thank for help. 1#include <allegro5/allegro.h>
2#include <allegro5/allegro_image.h>
3#include <allegro5/allegro_primitives.h>
4#include <iostream>
5using std::cout;
6using std::endl;
7
8int main(int argc, char **argv)
9{
10 if(!al_init()) {
11 return -1;
12 }
13 al_init_image_addon();
14 al_init_primitives_addon();
15
16 ALLEGRO_DISPLAY *display = NULL;
17
18 display = al_create_display(555,567);
19 al_install_mouse();
20
21 ALLEGRO_MOUSE_CURSOR *freeCursor = NULL;
22 ALLEGRO_MOUSE_CURSOR *grabCursor = NULL;
23
24 ALLEGRO_BITMAP *freeBmp = al_load_bitmap("handCursor.bmp");
25 ALLEGRO_BITMAP *grabBmp = al_load_bitmap("handCursorGrab.bmp");
26
27 freeCursor = al_create_mouse_cursor(freeBmp,5,5);
28 grabCursor = al_create_mouse_cursor(grabBmp,5,5);
29
30 ALLEGRO_EVENT_QUEUE *mouseEvents = NULL;
31 mouseEvents = al_create_event_queue();
32 al_register_event_source(mouseEvents, al_get_mouse_event_source());
33 ALLEGRO_EVENT button;
34 bool cursorChange1= false,cursorChange2=false;
35 al_show_mouse_cursor(display);
36 cout<<"start"<<endl;
37
38 while(1)
39 {
40 al_wait_for_event(mouseEvents,&button);
41
42 switch (button.type)
43 {
44 case ALLEGRO_EVENT_MOUSE_BUTTON_DOWN :
45 {
46 cursorChange2 = al_set_mouse_cursor(display,grabCursor);
47 if (cursorChange2)
48 cout<<"grabCursor set"<<endl;
49 else
50 cout<<"failed to set grabCursor"<<endl;
51
52 al_rest(3); // for testing
53 break;
54 }
55
56 case ALLEGRO_EVENT_MOUSE_BUTTON_UP :
57 {
58 cursorChange1 = al_set_mouse_cursor(display,freeCursor);
59 if (cursorChange1)
60 cout<<"freeCursor set"<<endl;
61 else
62 cout<<"failed to set freeCursor"<<endl;
63 break;
64 }
65 }
66 }
67 return 0;
68}
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Peter Wang
Member #23
April 2000
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What operating system? I believe in Windows the cursor wouldn't change until you moved the mouse following the al_set_mouse_cursor call.
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mickwa
Member #13,928
January 2012
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It is Windows 7 32bit. Moving mouse does not solve the problem. When I add hiding and showing cursor like this it works fine. 1cursorChange2 = al_set_mouse_cursor(display,grabCursor);
2al_hide_mouse_cursor(display);
3al_show_mouse_cursor(display);
But I still don't understand why this code in my first post does not change cursor. |
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Peter Wang
Member #23
April 2000
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Could well be a bug in Allegro.
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mickwa
Member #13,928
January 2012
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Maybe it is a bug. Can this post be moved to Allegro Development? I would be very thankful if someone could reply. |
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Thomas Fjellstrom
Member #476
June 2000
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mickwa said: Maybe it is a bug. Can this post be moved to Allegro Development? I would be very thankful if someone could reply. Someone did -- |
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mickwa
Member #13,928
January 2012
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Hi Peter, hi Thomas |
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Peter is our defacto "Dear" leader.