ImGui new thread

keszegh · July 2021

rrraptor said:

keszegh said:
i thought that a colorButton can automatically be the target of a drag-n-drop operation of a colorEdit3 but it is not the case. is that a bug?
in other words: i can drop a colorEdit3 color on a colorButton but i cannot drop a colotButton color on anything.
You can always check features that you need in ImGui's demo windo, because its written in C++
If it works exactly the same way in LUA then its not a problem from my side.

thanks, i can also use https://pthom.github.io/imgui_manual_online/manual/imgui_manual.html to check if the gideros demo window behaves as the original. and in this case it seems that indeed colorButton has this strange behaviour, so i will do some workaround (using a colorEdit3 with disabled popup).

keszegh · July 2021

when calling

colorlist[i],isTouching = imgui:colorEdit3("quick color "..i, colorlist[i],ImGui.ColorEditFlags_NoInputs|ImGui.ColorEditFlags_NoOptions|ImGui.ColorEditFlags_NoLabel |ImGui.ColorEditFlags_NoTooltip|ImGui.ColorEditFlags_NoPicker)

isTouching never seems to be true, although i guess it should be when i click on the item.

rrraptor · July 2021

keszegh said:
when using colorEdit3() in the popup i have two colors, current and original.
yet in colorPicker3() i only have current. is there a way to show original also there? (i.e., my colorPicker3 outcome should be identical to the colorEdit3() outcome. thanks

keszegh said:
i thought that a colorButton can automatically be the target of a drag-n-drop operation of a colorEdit3 but it is not the case. is that a bug?
in other words: i can drop a colorEdit3 color on a colorButton but i cannot drop a colotButton color on anything.

Added 2 functions, so its possible now

Code:

ui:colorButton("Test", clr1, alh1, 0, 0, ImGui.ColorEditFlags_AlphaBar | ImGui.ColorEditFlags_AlphaPreviewHalf | ImGui.ColorEditFlags_AlphaPreview)
if (ui:beginDragDropTarget()) then
	local payload = ui:acceptDragDropPayload("_COL4F")
	if (payload) then
		local color, alpha = payload:getColor4Data()
		if (color) then 
			print(color, alpha)
			clr1, alh1 = color, alpha
		end
	else
		local payload = ui:acceptDragDropPayload("_COL3F")
		if (payload) then
			local color = payload:getColor3Data()
			if (color) then 
				clr1 = color
			end
		end
	end
	ui:endDragDropTarget()
end
clr2, alh2 = ui:colorEdit4("Color 2", clr2, alh2, ImGui.ColorEditFlags_AlphaBar | ImGui.ColorEditFlags_AlphaPreviewHalf | ImGui.ColorEditFlags_AlphaPreview)
clr3 = ui:colorEdit3("Color 3", clr3)

keszegh · July 2021

hi, can't wait for these new features to end up in a release. thanks

rrraptor · July 2021

keszegh said:
hi, can't wait for these new features to end up in a release. thanks

ImGui:colorPicker3(). Its possible to add "original color", but I need to change original sources, but I dont want to do it.
ImGui:colorPicker4() have it out of the box, BUT you must provide it by ur self.

hexColor, alpha, originalColor, originalAlpha, isTouchingFlag = ImGui:colorPicker4(label, color [, ImGuiColorEditFlags = 0, originalColor = 0xffffff, 1])

Drag&Drop pull request is not merged yet.

keszegh · July 2021

strange that picker3 and picker4 behave differently from this aspect.

rrraptor · July 2021

Actually, you can easily make colorPicker3 with ref color by using colorPicker4:

color = ui:colorPicker4("Emulate colorPicker3", color, 1, ImGui.ColorEditFlags_NoAlpha, originalColor)

Just add "ImGui.ColorEditFlags_NoAlpha" flag

keszegh · July 2021

ScaledImageFilled etc documentation is also wrong. i try to guess the things using the source code but for some reason i have difficulties with that.

rrraptor · July 2021

keszegh said:
i have difficulties with that.

Mb that will help

Argument number is off by 1 because from LUA we can call functions like that:
myObject:myFunc(arg1, arg2, ...)
but its actually a syntax sugar for:
myObject.myFunc(myObject, arg1, arg2, ...)

For "ScaledImageFilled" it must be:

ImGui:scaledImageFilled(texture_or_rt, bg_w, bg_h, image_w, image_h [, tint_color = 0xffffff, tint_alpha = 1, 
bg_color = 0, bg_alpha = 1, border_color = 0xffffff, border_alpha = 0, 
anchor_x = 0.5, anchor_y = 0.5, frame_round = 0] )

-- left align 
ui:scaledImageFilled(texture, 256, 128, 128, 128, 0xff00ff, 1, 0xff0000, 1, 0, 1, 0, 0.5, 8)
-- right align
ui:scaledImageFilled(texture, 256, 256, 128, 128, nil, nil, nil, nil, 0, 1, 1, 0.5, 20)

keszegh · July 2021

thanks.
which file to check? i used https://github.com/MultiPain/Gideros_ImGui/blob/master/imgui_user.cpp so far but you showed parts of another.

rrraptor · July 2021

keszegh said:
thanks.
which file to check? i used https://github.com/MultiPain/Gideros_ImGui/blob/master/imgui_user.cpp so far but you showed parts of another.

This one is actual code, but u need to look at functions bindings that is called from LUA.
All functions here:
https://github.com/MultiPain/Gideros_ImGui/blob/master/main.cpp

Here is a list of functions names associated with their objects:
https://github.com/MultiPain/Gideros_ImGui/blob/ee021e26061201f12c0053c432b23ab85d127c30/main.cpp#L10529

For example, I have "imguiDrawListFunctionList" - functions for draw list object, you can confirm it here: https://github.com/MultiPain/Gideros_ImGui/blob/ee021e26061201f12c0053c432b23ab85d127c30/main.cpp#L10672
"ImDrawList" is the name of the object.
If u see something like:

g_pushInstance(L, "ImDrawList", object)

then this function returns an object which uses this list.
Or if I have something like this:

ImGuiTableSortSpecs* specs = getPtr<ImGuiTableSortSpecs>(L, "ImGuiTableSortSpecs");

then it uses this list: https://github.com/MultiPain/Gideros_ImGui/blob/ee021e26061201f12c0053c432b23ab85d127c30/main.cpp#L11088

keszegh · July 2021

thanks, this might shed enough light for the future. of course it's best if the documentation is not wrong, but from now on perhaps i will be brave enough to correct it too.

another thing: is there a way to set that inputText shows the already entered text right-aligned (e.g., think about your file-dialog and the current path view on the top, it would be more useful to show the end of it instead of the beginning, if it does not fit the box)?

rrraptor · July 2021

As far as I know, the only way is to use callbacks somehow (not possible until the update

)
Here is an example: https://github.com/MultiPain/Gideros_ImGui#example-1
There is a setCursorPos() which can help, but idk how you can use it...

rrraptor · July 2021

Working on adding another widget

keszegh · July 2021

rrraptor said:
As far as I know, the only way is to use callbacks somehow (not possible until the update )
Here is an example: https://github.com/MultiPain/Gideros_ImGui#example-1
There is a setCursorPos() which can help, but idk how you can use it...

ok, let's wait for the update and figure this out afterwards.

keszegh · July 2021

while building my file browser window at some point the scrolling with mouse wheel stopped working (at least i seem to remember that it worked a while ago). any ideas what might have happened? thanks
(it also does not work with the demowindow now and i suspect with nothing else)

EDIT: in the demowindow the mousewheel value does not change when scrolling!
EDIT: in the exported app it works, the issue is only in the giderosplayer.

EDIT: SOLVED. the problem was with my code. in certain cases my code stopped event propagation of mousewheel.

rrraptor · July 2021

keszegh said:
while building my file browser window at some point the scrolling with mouse wheel stopped working (at least i seem to remember that it worked a while ago). any ideas what might have happened? thanks
(it also does not work with the demowindow now and i suspect with nothing else)

EDIT: in the demowindow the mousewheel value does not change when scrolling!
EDIT: in the exported app it works, the issue is only in the giderosplayer.

No problems for me. I haven't touched mouse events code since 1.79.

keszegh · July 2021

@rrraptor, perhaps it is gideros related as it works in the exported app and it did work yesterday in the gideros player too.

keszegh · July 2021

what does checkboxFlags do?

keszegh · July 2021

keszegh said:
@rrraptor, perhaps it is gideros related as it works in the exported app and it did work yesterday in the gideros player too.

i think i've found the issue, i had another old gui item (not using imgui) that catched the scrolling event.

rrraptor · July 2021

keszegh said:
what does checkboxFlags do?

Turns on/off given flags
Example:

local WINDOW_FLAGS = ImGui.WindowFlags_MenuBar
function onDrawGui(e)
	ui:newFrame(e.deltaTime)
 
	if (ui:beginWindow("Test", nil, WINDOW_FLAGS)) then
		if (ui:beginMenuBar()) then 
			if (ui:beginMenu("Helo")) then 
				ui:menuItem("File1")
				ui:menuItem("File2")
				ui:menuItem("File3")
				ui:endMenu()
			end
			ui:endMenuBar()
		end
		WINDOW_FLAGS = ui:checkboxFlags("Menu bar", WINDOW_FLAGS, ImGui.WindowFlags_MenuBar)
		WINDOW_FLAGS = ui:checkboxFlags("No move", WINDOW_FLAGS, ImGui.WindowFlags_NoMove)
		WINDOW_FLAGS = ui:checkboxFlags("No title bar", WINDOW_FLAGS, ImGui.WindowFlags_NoTitleBar)
	end
	ui:endWindow()
 
	ui:render()
	ui:endFrame()
end

rrraptor · July 2021

I made an easier way to use dragFloats with tables:

-- Ugly way:
values1[1] = ui:dragFloat("Values 1", values1[1])
values2[1], values2[2] = ui:dragFloat2("Values 2", values2[1], values2[2])
values3[1], values3[2], values3[3] = ui:dragFloat3("Values 3", values3[1], values3[2], values3[3])
values4[1], values4[2], values4[3], values4[4] = ui:dragFloat4("Values 4", values4[1], values4[2], values4[3], values4[4])
 
-- Mush better way:
 
ui:dragFloatT("Values T1", values1)
ui:dragFloatT("Values T2", values2)
ui:dragFloatT("Values T3", values3)
ui:dragFloatT("Values T4", values4)

rrraptor · July 2021

Added same functions for all the others:

Now you can have as many sliders as you want in a single line

keszegh · July 2021

rrraptor said:

Now you can have as many sliders as you want in a single line

imgui feat rrraptor

rrraptor · July 2021

keszegh said:
imgui feat rrraptor

From C++ it was very easy to do, because the slider/drag/input function itself is generic :P All you have to do is feed the values list and tell how many component it should display.
https://github.com/MultiPain/Gideros_ImGui/blob/ee5edcdf8992358691ea80507e435d61334d6d28/main.cpp#L3849
1 line call

keszegh · July 2021

i can't wait to show you my app with the new imgui based gui, but it is still a work in progress, there are so many things to redo it takes some time.

keszegh · July 2021

i still have issues with scaledImageButton, e.g. this somehow pushed the item a few pixels to the left (even it goes below the next item which i have after a sameLine(0,0) and down:

imgui:scaledImageButton(self.textureFolder, 21, 21, 21 , 25, nil, 0xffffff, 1, 0x4f4f4f, 0, 0.5,0.5)

keszegh · July 2021

basically i have a squared texture and i want to make a button from it which has sizes width 16 and height 19 so that the texture is in the middle and not distorted.

rrraptor · July 2021

@keszegh hm, seems like something wrong with fit function. Fixing it right now...

keszegh · July 2021

rrraptor said:
@keszegh hm, seems like something wrong with fit function. Fixing it right now...

thanks.

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