Hidden Message Box (native dialogs)

no-reply@allegro.cc (AMCerasoli) — Sun, 27 Nov 2011 20:56:30 +0000

Hi guys I was making another tutorial and realize that after creating a display the message box using al_show_native_message_box() appear behind the display application, making it impossible to the user to know what it's happening. Am I doing something wrong?

Well this is the example I was about to show:

#SelectExpand
  1#include "allegro5/allegro.h"
  2#include "allegro5/allegro_image.h"
  3#include "allegro5/allegro_primitives.h"
  4#include "allegro5/allegro_native_dialog.h"
  5
  6short m_box(const char* message       = "No message given",
  7            const char* content_title = "Error",
  8            const char* title         = "Error"){
  9
 10   switch(al_show_native_message_box(NULL, title, content_title,
 11                                 message, NULL,
 12                                 ALLEGRO_MESSAGEBOX_ERROR)){
 13
 14      case 0: return 0; // User pressed the Cancel button
 15      case 1: return 1; //  "     "      "    OK     "
 16      case 2: return 2; // I don't understand what does this
 17
 18   }
 19}
 20
 21ALLEGRO_BITMAP *make_err_ima(ALLEGRO_DISPLAY *T_disp){
 22
 23   ALLEGRO_BITMAP *T_img = al_create_bitmap(32,32);
 24   if(!T_img)return 0;
 25   al_set_target_bitmap(T_img);
 26   al_clear_to_color(al_map_rgb(255, 0, 0));
 27   al_draw_line( 0,  0, 32, 32, al_map_rgb(255, 255, 255), 1.5);
 28   al_draw_line(32,  0,  0, 32, al_map_rgb(255, 255, 255), 1.5);
 29   al_set_target_bitmap(al_get_backbuffer(T_disp));
 30   return T_img;
 31
 32}
 33
 34int main(){
 35
 36   ALLEGRO_DISPLAY *display = NULL;
 37   ALLEGRO_BITMAP  *image   = NULL;
 38
 39   if(!al_init()) {
 40      m_box("Problems when initilizing Allegro");
 41   }
 42
 43   if(!al_init_image_addon()) {
 44      m_box("Problems when initilizing the image addon");
 45   }
 46
 47   if(!al_init_primitives_addon()) {
 48      m_box("Problems when initilizing the primitives addon");
 49   }
 50
 51   display = al_create_display(800,600);
 52
 53   if(!display){
 54      m_box("Problems when creating the display");
 55   }
 56   //Since all this initializations are very necessary, there is no much we can do in case they fail
 57
 58   image = make_err_ima(display);
 59
 60   if(!image){
 61      m_box("Problems when creating the image");
 62      return 0;
 63   }
 64/*
 65   al_draw_bitmap(image, 200, 200, 0);
 66
 67   al_flip_display();
 68
 69   al_rest(2);
 70*/
 71   al_destroy_bitmap(image);
 72
 73   return 0;
 74}

Thanks!.

no-reply@allegro.cc (torhu) — Mon, 28 Nov 2011 00:19:43 +0000

Try using al_get_current_display() as the first argument of al_show_native_message_box(), instead of NULL.

no-reply@allegro.cc (AMCerasoli) — Mon, 28 Nov 2011 05:48:44 +0000

Thank you man!, you just solve it!.

no-reply@allegro.cc (tobing) — Mon, 28 Nov 2011 13:52:04 +0000

Same for me, had the same problem. I thought it was some weird Windows thing...

no-reply@allegro.cc (AMCerasoli) — Mon, 28 Nov 2011 18:52:53 +0000

Yes the thing is that even when I have seen that function (al_get_current_display()) in the past, I didn't have it in mind, I don't know why, in fact in my current game, there are a lot of "display" pointers going around... How stupid of me...

Anyway I finish another tut, if you want to check it to see if there are some errors and stuff... Showing a basic native GUI message box. It got bigger than I would like it to be, but wth...

no-reply@allegro.cc (torhu) — Tue, 29 Nov 2011 00:16:13 +0000

The docs for that function is in the wrong section of the manual, too.

no-reply@allegro.cc (AMCerasoli) — Tue, 29 Nov 2011 23:50:51 +0000

Yep, it should definitively be placed into the Display section.