ImGui new thread

keszegh · June 2021

does somebody know how can i register/handle a right mouse click on a button in imgui?

EDIT: i have found the solution:

if imgui:isItemHovered(ImGui.HoveredFlags_AllowWhenBlockedByActiveItem) and imgui:isMouseClicked(KeyCode.MOUSE_RIGHT) then .... end

the trick was that instead of "ImGui.MouseButton_Right" one needs to put "KeyCode.MOUSE_RIGHT" into imgui:isMouseClicked() for some reason.

actually with this trick there is a simpler solution:

if imgui:isItemClicked(KeyCode.MOUSE_RIGHT) then .... end

EDIT: both solutions are not perfect as they register many presses, not just one, if one does not release the button very quickly. also it registers even if i pressed right button before hovering the item. i will post solution when i have one.

MoKaLux · June 2021

~~DELETED~~ useless comment

https://github.com/jvcleave/ofxImGui/issues/55
https://discourse.dearimgui.org/t/distinguish-between-drag-click-double-click-after-mouse-release/283/3
hope this helps/works?

EDIT:

bool ImGui::IsItemClicked(ImGuiMouseButton mouse_button)
{
    return IsMouseClicked(mouse_button) && IsItemHovered(ImGuiHoveredFlags_None);
}

from imgui.cpp

keszegh · June 2021

MoKaLux said:
~~DELETED~~ useless comment

https://github.com/jvcleave/ofxImGui/issues/55
https://discourse.dearimgui.org/t/distinguish-between-drag-click-double-click-after-mouse-release/283/3
hope this helps/works?

thanks, i will check this out.

SinisterSoft · June 2021

Quick solution to the texture memory leak...

In my main.lua ....

uis={}
function cacheUi(s,u)
	local found=uis[u]
	if found then
		print("using ui",u)
		s.ui=found
		s.io=found:getIO()
		uiCheckSize(s)
		setTheme(found)
		found:setVisible(true)
		s:addChild(found)
	else
		local ui=ImGui.new()
		if ui then
			print("fresh ui",u)
			uis[u]=ui
			setUIFont(ui)
			s.io=ui:getIO()
			s.ui=ui
			uiCheckSize(s)
			setTheme(ui)
			s:addChild(ui)
		end
	end
end
 
function hideUi(u)
	local found=uis[u]
	if found then
		print("hiding ui",u)
		found:setVisible(false)
	end
end

in my 'licence' scene init and the transition out code:

  cacheUi(self,"licence")
  self:addEventListener("exitEnd",self.onTransitionOutEnd,self)
end
 
function Licence:onTransitionOutEnd()
	hideUi("licence")

Basically I only create each ui once, I then hide and unhide it as required = goodbye texture memory leak...

Don't forget to set the name for each scene ui, I name them after the scene name.

rrraptor · June 2021

Kinda fixed...but not sure.

This is the fix, but I feel like there should be

imgui->proxy->unref();

call, but it does not work, it leads to a crush. @hgy29 any hints?)

https://github.com/gideros/gideros/pull/510

keszegh · June 2021

good to see you back @rrraptor.

about my problem with right-clicking i also asked on the main imgui forum and it seems there is no clean solution:
https://github.com/ocornut/imgui/issues/4241#issuecomment-864372615
which makes me want to try to avoid this advanced behavior of buttons in the future, as it was unintuitive for many users anyway (even though i liked it a lot).

keszegh · June 2021

@rrraptor , with the new (forthcoming) update the html issues are also solved? thanks

hgy29 · June 2021

@rrraptor I think proxy->unref() is not needed here, it will be destroyed by lua when the object goes out of scope.
BTW we (@SinisterSoft and I) found the reason from the crash in html (and actually all platforms beside Qt): it was due to autoCursorUpdate not being initialized and being enabled while only Qt platform supports setting of the cursor.

keszegh · June 2021

i have found a small issue:
even though i set
IO = imgui:getIO()
IO:setConfigWindowsMoveFromTitleBarOnly()
i can still move the window by grabbing it anywhere (Which is not a button etc)

keszegh · June 2021

another issue:
FontAtlas:bake()
does not seem to exist.
(after calling FontAtlas = IO:getFonts())

EDIT: FontAtlas:build() seems to do the job so probably https://github.com/MultiPain/Gideros_ImGui#minimal-example needs to be corrected.

let me know if you prefer issues to be added on github.

keszegh · June 2021

another small thing:
in an imgui:inputText object when i press backspace it usually deletes suddenly a lot of characters, instead of one at a time. can i change this behaviour?

SinisterSoft · June 2021

@hgy29 does win32 not support setting of cursor? https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setcursor

hgy29 · June 2021

it does, but nobody wrote the required support code in gideros

keszegh · June 2021

keszegh said:
another small thing:
in an imgui:inputText object when i press backspace it usually deletes suddenly a lot of characters, instead of one at a time. can i change this behaviour?

does everybody have this issue?

SinisterSoft · June 2021

@keszegh try https://web.reportcomplete.com I don't have the issue there,

keszegh · June 2021

SinisterSoft said:
@keszegh try https://web.reportcomplete.com I don't have the issue there,

indeed, i wonder what's my issue. i tried a html export but it's the same there.

keszegh · June 2021

i've noticed that also delete button and left/right arrows register 4-5 times when only pressed once in an inputtext. in an early version when the menu was just in itself (doing nothing) and not merged with my app, it worked fine. but i don't know what changed that lead to this behaviour.

MoKaLux · June 2021

(at) keszegh, we need some code so we can test on our machines please

rrraptor · June 2021

hgy29 said:
@rrraptor I think proxy->unref() is not needed here, it will be destroyed by lua when the object goes out of scope.
BTW we (@SinisterSoft and I) found the reason from the crash in html (and actually all platforms beside Qt): it was due to autoCursorUpdate not being initialized and being enabled while only Qt platform supports setting of the cursor.

Ah, ok. Ill remove this feature.

keszegh said:
i have found a small issue:
even though i set
IO = imgui:getIO()
IO:setConfigWindowsMoveFromTitleBarOnly()
i can still move the window by grabbing it anywhere (Which is not a button etc)

No problems for me...

--must be
IO:setConfigWindowsMoveFromTitleBarOnly(true)

You can watch config flags in demo window:

keszegh said:
another issue:
FontAtlas:bake()
does not seem to exist.
(after calling FontAtlas = IO:getFonts())

EDIT: FontAtlas:build() seems to do the job so probably https://github.com/MultiPain/Gideros_ImGui#minimal-example needs to be corrected.

let me know if you prefer issues to be added on github.

You can edit readme if you want

Fixed.

keszegh said:
another small thing:
in an imgui:inputText object when i press backspace it usually deletes suddenly a lot of characters, instead of one at a time. can i change this behaviour?

keszegh said:
i've noticed that also delete button and left/right arrows register 4-5 times when only pressed once in an inputtext. in an early version when the menu was just in itself (doing nothing) and not merged with my app, it worked fine. but i don't know what changed that lead to this behaviour.

No problems for me.
You can try to tweak this settings:

IO:setKeyRepeatDelay(0.5) -- default 0.25
IO:setKeyRepeatRate(0.1) -- default 0.05

hgy29 · June 2021

rrraptor said:

Ah, ok. Ill remove this feature.

Leave it in, I think it is an interesting feature. I have fixed the init code so that it is disabled by default.

rrraptor · June 2021

hgy29 said:

rrraptor said:

Ah, ok. Ill remove this feature.
Leave it in, I think it is an interesting feature. I have fixed the init code so that it is disabled by default.

I can add separated function like this:

From LUA simply call

ui:updateMouseCursor()

before

ui:render()

keszegh · June 2021

about the "IO:setConfigWindowsMoveFromTitleBarOnly(true)" issue i did it call with true, of course. i've found the thing that i did wrong. the problem was that there was no titlebar at all on my window (and then this flag is discarded), i've confused the menubar with the titlebar.

so overall there is a situation i can't solve:
i don't want a title bar just only contains a name, instead i want a menu bar at the top of the window and grabbing that should be the only way to move the window. the neatest solution would be to be able to add menus to the title bar. is that possible? (i think a year ago we've discussed this problem but i don't remember if there was a possibility)

keszegh · June 2021

for the key issue i set
IO:setKeyRepeatDelay(1000) -- default 0.25
IO:setKeyRepeatRate(1000) -- default 0.05
and it does not have any affect (not only i still have the backspace etc. issue, pressing any character the repeat delay and rate seem to be the same as without these values set to 1000.

keszegh · June 2021

meanwhile another issue: the imgui windows are clipped to a subregion of my whole app area. how can i avoid this clipping?

keszegh · June 2021

keszegh said:
about the "IO:setConfigWindowsMoveFromTitleBarOnly(true)" issue i did it call with true, of course. i've found the thing that i did wrong. the problem was that there was no titlebar at all on my window (and then this flag is discarded), i've confused the menubar with the titlebar.

so overall there is a situation i can't solve:
i don't want a title bar just only contains a name, instead i want a menu bar at the top of the window and grabbing that should be the only way to move the window. the neatest solution would be to be able to add menus to the title bar. is that possible? (i think a year ago we've discussed this problem but i don't remember if there was a possibility)

i tried my luck also on the main imgui github page to get some help but so far in vain:
https://github.com/ocornut/imgui/issues/4258

rrraptor · June 2021

So...this is what you need?

rrraptor · June 2021

keszegh said:
meanwhile another issue: the imgui windows are clipped to a subregion of my whole app area. how can i avoid this clipping?

I dont understand, sorry

Can you post a screenshot?

keszegh · June 2021

rrraptor said:
So...this is what you need?

yesyesyes

keszegh · June 2021

so let me know how to do it, although i guess you've modified the source code to achieve that and so i need to wait for the next version.
it's fun that on the main imgui github page i'm still trying to explain what i want and try to be taken seriously while you've already done it. that's what i call gideros forum-style help. thanks

SinisterSoft · June 2021

Is there a way in imgui for an event to be generated when a key is pressed in a text input box. That way the Enter key can be checked for so an action occurs if they write some text and press Enter.

Also is there a way to set a specific gadget to be the active one - eg after they enter a username, you set the active gadget to be the password input box.

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