imGui bindings

keszegh · August 2020

btw setStyleColor is missing from API description.
is there an equivalent function for setting Vars instead of pushing them?

rrraptor · August 2020

keszegh said:
btw setStyleColor is missing from API description.

Yeah, forgot about that

keszegh said:
is there an equivalent function for setting Vars instead of pushing them?

Seems like this is the only way.

@hgy29 I asked on the discord server about fonts and that is what I get:

Any thoughts?

keszegh · August 2020

so i've noticed the issue i had with filledint:
if the values are decreasing, i.e. instead of 0,100 it is 100,0 then ctrl+click to set value is completely not working at all, it sets max or min irrespective of value.

rrraptor · August 2020

keszegh said:
so i've noticed the issue i had with filledint:
if the values are decreasing, i.e. instead of 0,100 it is 100,0 then ctrl+click to set value is completely not working at all, it sets max or min irrespective of value.

Well, that is easy to fix. Updated "docking" dll.

keszegh · August 2020

rrraptor said:

keszegh said:
so i've noticed the issue i had with filledint:
if the values are decreasing, i.e. instead of 0,100 it is 100,0 then ctrl+click to set value is completely not working at all, it sets max or min irrespective of value.
Well, that is easy to fix. Updated "docking" dll.

does not seem to be updated recently and consequently slider set value is still wrong.
EDIT: i've found the correct one, looked in the docking tree.

keszegh · August 2020

i have a question, perhaps @rrraptor you know a solution.
so in my windows having a titlebar is informative but sometimes i also have a menubar right below it and together it's a waste of space as they could be on the same line. is there a way to add menu elements to the title bar? solving from the other direction, i could of course disable the titlebar and only have a menubar with the same colors. the only functional difference is that i want to set that only the titlebar can be dragged but if i disable it then again the whole window is draggable, which i do not want. so with this solution i'd need somehow to limit draggability to the menubar.

EDIT: i've found a workaround using
imgui:beginChild("fake1",nil,nil,nil, ImGui.WindowFlags_NoMove)
but it's a bit ugly as i need two beginChild, one with no windowpadding (to prevent dragging even the boundary areas) and one with padding so that it looks as it should (having a boundary).

EDIT: and even this workaround has the weakness that i cannot double-click on the menubar to collapse the window, like the titlebar works.

EDIT: and it turns out that with two beginChild for some reason the boundary area IS draggable, so it's far from optimal.

hgy29 · August 2020

rrraptor said:

@hgy29 I asked on the discord server about fonts and that is what I get:

Any thoughts?

Yes, I think the issue is on our side somehow, but alpha blending is correctly enabled and we already dealt with premultiplied alpha. Moreover the full texture seems badly rendered, so it can't be a texture coordinate issue for individual characters. We tried filtering with no luck, and we tested in no scale mode iirc. I am not sure what is left.
What could help is getting the original texture data pixel values (not rendered by gideros), and if the glyphs are badly rendered in that texture then it is a font generation issue. If they are well formd, then it is a rendering issue.

keszegh · August 2020

@rrraptor , it would be nice if we could setScale and setPosition an imgui object so that it works correctly afterwards (now the clicks etc are incorrect after a scaling e.g.)

rrraptor · August 2020

Good news. First, I know why fonts looks so ugly, second, I dont know how to fix it

Hope @hgy29 can help.
And the problem is still with premultiplied alpha

Here is the proof:

As you can see it works with Light theme. But colors messed up (too bright).

Added cursor rendering support.

Enabled by

imgui:ioSetMouseDrawCursor(flag)

It turns off system cursor by calling

application:set("cursor", "blank")

keszegh said:
i have a question, perhaps @rrraptor you know a solution.
so in my windows having a titlebar is informative but sometimes i also have a menubar right below it and together it's a waste of space as they could be on the same line. is there a way to add menu elements to the title bar? solving from the other direction, i could of course disable the titlebar and only have a menubar with the same colors. the only functional difference is that i want to set that only the titlebar can be dragged but if i disable it then again the whole window is draggable, which i do not want. so with this solution i'd need somehow to limit draggability to the menubar.

Hm, Im not an expert

You can ask someone on discord server.

keszegh said:
@rrraptor , it would be nice if we could setScale and setPosition an imgui object so that it works correctly afterwards (now the clicks etc are incorrect after a scaling e.g.)

Yes, I kinda forgot about this

hgy29 · August 2020

rrraptor said:
Good news. First, I know why fonts looks so ugly, second, I dont know how to fix it Hope @hgy29 can help.
And the problem is still with premultiplied alpha
Here is the proof:

As you can see it works with Light theme. But colors messed up (too bright).

Yes, that must be again premultiplied alpha, and I think I know what we forgot! We didn't premultiply alpha on texture pixels (texels) themselves, which Gideros does internally. It must be that.

rrraptor · August 2020

Fixed. Now I can start working on fonts API

rrraptor · August 2020

Source code updated.
Note for @hgy29 : I moved imgui_user.h & .cpp files to root dir (because of "docking" branch). They were also updated (added new widget).
ImGui sources (in imgui_src dir) also slightly modified (fonts fix and ImGui.ClampOnInput fix).

Or maybe I should fork gideros repo and change it ...?) That would be better for you

hgy29 · August 2020

Ok, All makefiles will have to be updated then

keszegh · August 2020

rrraptor said:

Fixed. Now I can start working on fonts API

how do you make those tabbed windows that are on your screenshot (my window, style editor etc)?

rrraptor · August 2020

@keszegh docking ability. Drag one window title over another.

keszegh · September 2020

what are the API functions for docking?

rrraptor · September 2020

keszegh said:
what are the API functions for docking?

See here
http://forum.giderosmobile.com/discussion/comment/63943/#Comment_63943

SinisterSoft · September 2020

It would be great if the wiki could be updated for this new plugin.

Edit: Just noticed it was!

https://wiki.giderosmobile.com/index.php/Dear_ImGui

SinisterSoft · September 2020

(the 'Dear' bit fooled me, I thought it was just called umGui.

)

I think someone should suggest it for inclusion here: https://github.com/ocornut/imgui/wiki/Bindings

rrraptor · September 2020

keszegh said:
@rrraptor , it would be nice if we could setScale and setPosition an imgui object so that it works correctly afterwards (now the clicks etc are incorrect after a scaling e.g.)

Done.

I can also add rotation support, but Im not very experienced with transform matrices, so it can take some time

P.S. dll's updated

MoKaLux · September 2020

magnifico

keszegh · September 2020

rotating or skewing (emulate 3d rotate) the gui would be very hollywood scifi.

rrraptor · September 2020

Ok, so it works with every other transform

But it is kinda useless because window clipping brakes...

keszegh · September 2020

it's cool anyway : )

rrraptor · September 2020

Well, maybe @hgy29 can tell us if it is possible to fix clipping issue

It must be something with "doDraw" CurrentTransform ... ?

keszegh · September 2020

very good progress. what's still missing at this point?

rrraptor · September 2020

I want to separate "draw lists", "io" and "styles" function to a different object. But I have some troubles with c++ knowledge (all this pointers and references...)

So it will look like:

local style = imgui:getStyle()
style:setAlpha(0.5) -- global alpha, right now it is called like that: imgui:setGlobalAlpha*0.5)

keszegh · September 2020

Having the API as close as possible to the original one is preferable I think, even if it's not most intuitive.

hgy29 · September 2020

rrraptor said:
Well, maybe @hgy29 can tell us if it is possible to fix clipping issue It must be something with "doDraw" CurrentTransform ... ?

Clipping can only be axis aligned, so it won’t work with rotated/skewed sprites

rrraptor · September 2020

hgy29 said:

rrraptor said:
Well, maybe @hgy29 can tell us if it is possible to fix clipping issue It must be something with "doDraw" CurrentTransform ... ?
Clipping can only be axis aligned, so it won’t work with rotated/skewed sprites

I never tried to clip rotated/skewed object, so I thought that it is possible.

P.S. same for standard object

local px = Pixel.new(0xff0000, 1, 256, 256)
stage:addChild(px)
px:setClip(0,0,256,256)
 
local ps = Particles.new()
px:addChild(ps)
stage:addEventListener("enterFrame", function(e)
	ps:addParticles{
		{
			x = math.random(256),
			y = math.random(256),
			size = math.random(5,20),
			ttl = 120,
			color = math.random(0xffffff),
			speedX = math.random() + 0.2 * (math.random() < 0.5 and -1 or 1),
			speedY = math.random() + 0.2 * (math.random() < 0.5 and -1 or 1),
		}
	}
end)
 
px:setRotation(45)
px:setPosition(100,100)
px:setSkew(4,5)

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