Hello,

 

So short story, I am trying to make a button in a player inventory that will lead to a custom GUI.

For version 1.12 I think you use `InitGuiEvent`.

I've been told i could use method called `addWidget` but I am not sure what event should I use.

Any help would be really appreciated.

 

Thanks.

Yes, you need to subscribe to `GuiScreenEvent.InitGuiEvent.Pr

e event)` in order to add widgets, the event itself has a method `addWidget`.
Here's an example of how it could be used:

@SubscribeEvent
public void addCustomButtonToInventory(GuiScreenEvent.InitGuiEvent.Pre event)
{
  if (event.getGui() instanceof InventoryScreen)
  {
    event.addWidget(new Button(x, y, width, height, text, button -> {
      Minecraft.getInstance().displayGuiScreen(new CustomGUI());
    }));
  }
}

If you aren't familiar with the `button -> {...}` syntax, this Button constructor takes an Button.IPressable as a parameter, which is the behavior that happens when you click. Equivalent code would look like this:

@SubscribeEvent
public void addCustomButtonToInventory(GuiScreenEvent.InitGuiEvent.Pre event)
{
  if (event.getGui() instanceof InventoryScreen)
  {
    event.addWidget(new Button(x, y, width, height, text, new CustomAction()));
  }
}

class CustomAction implements IPressable {
  public void onPress(Button button) {
    Minecraft.getInstance().displayGuiScreen(new CustomGUI());
  }
}

Hope this helps!

1 minute ago, Vinyarion said:

Yes, you need to subscribe to `GuiScreenEvent.InitGuiEvent.Pr

e event)` in order to add widgets, the event itself has a method `addWidget`.
Here's an example of how it could be used:

@SubscribeEvent
public void addCustomButtonToInventory(GuiScreenEvent.InitGuiEvent.Pre event)
{
  if (event.getGui() instanceof InventoryScreen)
  {
    event.addWidget(new Button(x, y, width, height, text, button -> {
      Minecraft.getInstance().displayGuiScreen(new CustomGUI());
    }));
  }
}

If you aren't familiar with the `button -> {...}` syntax, this Button constructor takes an Button.IPressable as a parameter, which is the behavior that happens when you click. Equivalent code would look like this:

@SubscribeEvent
public void addCustomButtonToInventory(GuiScreenEvent.InitGuiEvent.Pre event)
{
  if (event.getGui() instanceof InventoryScreen)
  {
    event.addWidget(new Button(x, y, width, height, text, new CustomAction()));
  }
}

class CustomAction implements IPressable {
  public void onPress(Button button) {
    Minecraft.getInstance().displayGuiScreen(new CustomGUI());
  }
}

Hope this helps!

Exactly what I needed, explained well. Thank you very much for your time!

@Vinyarion, sorry for mentioning you!
So when adding widget  

x, y, width, height, text,

is a position of the button in pixels? And what does "text" do?

And can I remove CustomAction so i can only test a button without function to it?

  

1 hour ago, Swirls said:

@Vinyarion, sorry for mentioning you!
So when adding widget  

x, y, width, height, text,

is a position of the button in pixels?

Yes

1 hour ago, Swirls said:

And what does "text" do?

It puts text on the button so that the button has the text "text"

1 hour ago, Swirls said:

And can I remove CustomAction so i can only test a button without function to it?

  

No, but if you want no functionality, leave the function empty.

54 minutes ago, Draco18s said:

Yes

It puts text on the button so that the button has the text "text"

No, but if you want no functionality, leave the function empty.

Oh yea, thanks, this might be stupid question but i dont seem to understand where should i call the event? 

10 minutes ago, Swirls said:

but i dont seem to understand where should i call the event? 

You mean this:

17 hours ago, Swirls said:

public void addCustomButtonToInventory(GuiScreenEvent.InitGuiEvent.Pre event)

 

Its an event handler. You don't call it. It's called automatically.

1 minute ago, Draco18s said:

You mean this:

 

Its an event handler. You don't call it. It's called automatically.

Yea, but I've been told i need to call it because at the moment its not working. So people told me to call it

13 minutes ago, Draco18s said:

I have my event handler, but anyways doesn't seem to be working. Well I will work something out. thank you for your time!