Legacy GM [SOLVED] Multiple Level Buttons

[ZyKro]

I am trying to implement a level select to my platform game. I want to be able to create multiple buttons to select the level without having to individually place all of them and put in creation code to go to the level I want. I was wondering if I could use a for loop for it, but I have been having trouble with doing this.
I want to be able to easily create multiple buttons with a number telling the level it is and be able to go to the level without having to use creation code.

 

[SoVes]

this should work if you use a mouse

in the buttons step

if (mouse_check_button_pressed(mb_left) && position_meeting(mouse_x, mouse_y, id)) {
   room_goto( room name);
}

 

[ZyKro]

I also want to be able to create multiple buttons and not have to use creation code to go to rooms. Could I use a script and load into an object to create multiple instances with different numbers for the level number?

 

[Simon Gust]

Loops and arrays are your friends in this one.

// create
/*
create an array that holds the room ids
*/
room_id[0] = room_first_level;
room_id[1] = room_second_level;
...

// draw
/*
then, you need to assign buttons to the array, check for their positions and draw them
*/
for (var i = 0; i < 10; i++)
{
  // assign positions
  var xx = 20 + i * 32;
  var yy = 20;
  var wdt = sprite_get_width(spr_room_buttons);
  var hgt = sprite_get_height(spr_room_buttons);

  // select
  if (point_in_rectangle(mouse_x, mouse_y, xx, yy, xx + wdt, yy + hgt))
  {
    if (mouse_check_button_pressed(mb_left))
    {
      room_goto(room_id[i]);
    }
    // if you want to make an effect that the mouse in hovering on the button, here would be it
    //draw_sprite(spr_button_highlight, 0, xx, yy);
  }

  // draw
  draw_sprite(spr_room_buttons, i, xx, yy);
}

This way you're not using instances at all, only sprites.

 

[ZyKro]

This is very helpful! Thank you for your help.

 

[ZyKro]

The highlight isn't working for me.

 

[Simon Gust]

Is it only the highlight that isn't working and nothing else?
Because important is that the rest works first.
Do you get an error message?

 

[ZyKro]

I did not get an error message, but the highlight is not the only thing. The area for the mouse to click seems to be small. If it helps, my sprites are centered. Everything else does work though.

 

[Simon Gust]

Ah yes, centered sprites, the bane of this system.
you either need to put the origins to 0, 0 or do this in the part of the code

...
// select 
if (point_in_rectangle(mouse_x - wdt/2, mouse_y - hgt/2, xx, yy, xx + wdt, yy + hgt))
{
...

It may also be + wdt/2, I can't remember which one it was.

 

[ZyKro]

I can click anywhere on the button now. But I still don't see a highlight

 

[Simon Gust]

Try putting the button drawing before the highlight drawing. (just after xx and yy have been initialized)

 

[ZyKro]

That did the trick. Also, how would I be able to make the buttons go to the next row after a certain amount of buttons have been created. e.g. If I have 1 row of buttons with 6 each in them and want another row after that row is created. Would I have to use two different objects? Or could I implement it in the same object?

 

[Xer0botXer0]

Two for loops. I'm actually busy with that.. not buttons but objects in a grid.

 

[Simon Gust]

In the same object, but with 2D arrays.

// create
room_id[0, 0] = room_first_level;
room_id[0, 1] = room_second_level;
...
room_id[1, 5] = room_last_level;
lines = 2;
rows = 6;

// draw
var wdt = sprite_get_width(spr_room_buttons);
var hgt = sprite_get_height(spr_room_buttons);
for (var i = 0; i < rows; i++) //6 rows
{
    for (var j = 0; j < lines; j++) //2 lines
    {
        var xx = 20 + i * 32;
        var yy = 20 + j * 32;
      
        // draw
        var index = i * lines + j;
        draw_sprite(spr_room_buttons, index, xx, yy);

        // select
        if (point_in_rectangle(mouse_x - wdt/2, mouse_y - hgt/2, xx, yy, xx + wdt, yy + hgt))
        {
            if (mouse_check_button_pressed(mb_left))
            {
                room_goto(room_id[i, j]);
            }
            draw_sprite(spr_button_highlight, 0, xx, yy);
        }       
    }
}