[Closed] dotnet btn – get read of square

I found by myself! Thank you anyway
If you have any better solution, please add it here.

(
 	global CamSwitch
 	local COL1 = (dotNetClass "System.Drawing.Color").fromARGB (((colorMan.getColor #background) * 255)[1] as integer) (((colorMan.getColor #background) * 255)[2] as integer) (((colorMan.getColor #background) * 255)[3] as integer)
 	local rec_grey = "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"
 	local rec_red = "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"
 	local ConvertClass = dotNetClass "System.Convert"
 	local ImageClass = dotNetClass "System.Drawing.Image"
 	fn StringToImage str = --  http://lonerobot.net/ 
 	(
 		byteArr = ConvertClass.FromBase64String str
 		memstream = dotnetobject "System.IO.MemoryStream" byteArr
 		DecodedImg = ImageClass.fromstream memstream
 		memstream.close() ; return DecodedImg
 	)
 	rollout CamSwitch "ui items"
 	(
 		local bm = bitmap 50 50 color:blue
 		local rm = bitmap 50 50 color:red
 		local redcol = false
 		dotnetcontrol rec_btn "Label" width:25 height:25 
 		on rec_btn Click arg do
 		(
 			if redcol == true then 
 			(	
 				rec_btn.image = (StringToImage rec_grey)
 				redcol = false
 			)	
 			else
 			(
 				rec_btn.image = (StringToImage rec_red)
 				redcol = true
 			)	
 			
 		)	
 		on CamSwitch open do
 		(
 			rec_btn.image = (StringToImage rec_grey)
 			rec_btn.BackColor = COL1 
 		)	
 			
 	)
 	createdialog CamSwitch width:100 height:100
 )

This might also work for the CheckBox control:

rec_btn.FlatAppearance.BorderSize = 0

Thank you PolyTools3D!

Here is the final code:

(
	global ui_items
	   local COL1 = (dotNetClass "System.Drawing.Color").fromARGB (((colorMan.getColor #background) * 255)[1] as integer) (((colorMan.getColor #background) * 255)[2] as integer) (((colorMan.getColor #background) * 255)[3] as integer)
	   local rec_grey = "iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAAAX  NSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAZdEVYdFNvZnR3  YXJlAEFkb2JlIEltYWdlUmVhZHlxyWU8AAADImlUWHRYTUw6Y2  9tLmFkb2JlLnhtcAAAAAAAPD94cGFja2V0IGJlZ2luPSLvu78i  IGlkPSJXNU0wTXBDZWhpSHpyZVN6TlRjemtjOWQiPz4gPHg6eG  1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0  az0iQWRvYmUgWE1QIENvcmUgNS4zLWMwMTEgNjYuMTQ1NjYxLC  AyMDEyLzAyLzA2LTE0OjU2OjI3ICAgICAgICAiPiA8cmRmOlJE  RiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMD  IvMjItcmRmLXN5bnRheC1ucyMiPiA8cmRmOkRlc2NyaXB0aW9u  IHJkZjphYm91dD0iIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG  9iZS5jb20veGFwLzEuMC8iIHhtbG5zOnhtcE1NPSJodHRwOi8v  bnMuYWRvYmUuY29tL3hhcC8xLjAvbW0vIiB4bWxuczpzdFJlZj  0iaHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wL3NUeXBlL1Jl  c291cmNlUmVmIyIgeG1wOkNyZWF0b3JUb29sPSJBZG9iZSBQaG  90b3Nob3AgQ1M2IChXaW5kb3dzKSIgeG1wTU06SW5zdGFuY2VJ  RD0ieG1wLmlpZDo5MDEyRUZEOEJGQUExMUUyOERCOEUxRDdFME  FBNTE1QyIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDo5MDEy  RUZEOUJGQUExMUUyOERCOEUxRDdFMEFBNTE1QyI+IDx4bXBNTT  pEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlk  OjkwMTJFRkQ2QkZBQTExRTI4REI4RTFEN0UwQUE1MTVDIiBzdF  JlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjkwMTJFRkQ3QkZBQTEx  RTI4REI4RTFEN0UwQUE1MTVDIi8+IDwvcmRmOkRlc2NyaXB0aW  9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQg  ZW5kPSJyIj8++yPtMAAAAiFJREFUOE91lEmOwkAMRbPmNMzzDG  FGQiwCLYGExCAxHyeHyFmy5CA5gduvlIqAVi/cZVz2q2+nqp1yufxtqWKx6BUKBV/XUNcon89HuuL7ah45XzXOx49SqeRqYlCtVqXZbEq73ZZOpyOtV  kvq9bpUKhVRuCg4IPe9NnE04Uc3XxS5rivD4VBGo5EMBgPp9/sJsNFoGKDCXtR8gKBr8IUCIJPJRKbTqYzHYwOzwF6vl8BQHcOM  MkAp2mGTRIoArddrOZ1Ocr1ejeET4yDbqgqQXC4XwHDi4RnptI  CKw+Eg9/td9vu9bDYbY/jE2EMdM0SVggQGIL9WqxkQp1H0eDxkuVwm7RDHJ8YeOeTH7QHz  AYXIZD4M+HK5yHa7TcAAUMlKjD1y+A1I6yWbzYYOd4T50PdsNp  Pn8ynz+Vy63a6Bs7777JFDLiCuQyaTiRyVFaEIEF/KJvHb3iMM//0wchkJoHQ6bUAhZIbHPM7ns5mBnRsACyTGHjmoQ0CsKATk8xkJ  AlutVsmwAXAIhm+HTY7tIp6RGbbH5DnNbjLQ2+0mx+PR+Bg+MX  wOZK7Ak8/PZVJigEROtsoWi4XsdjtzETF8YuxzKK2xUmsupP7hnbka4LobG  AnfZlsEZL9iXJM8EWMq70eH9qJnCpFuW7AqAXB/aF9b+vtorcXKAvrmhVPAs6HYvjHNM+1YJdY+QLGldPieJvtqoV  qkYCxU++cfW9n5BdaV9hSe4mKuAAAAAElFTkSuQmCC"
	   local rec_red = "iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAAAX  NSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAZdEVYdFNvZnR3  YXJlAEFkb2JlIEltYWdlUmVhZHlxyWU8AAADImlUWHRYTUw6Y2  9tLmFkb2JlLnhtcAAAAAAAPD94cGFja2V0IGJlZ2luPSLvu78i  IGlkPSJXNU0wTXBDZWhpSHpyZVN6TlRjemtjOWQiPz4gPHg6eG  1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0  az0iQWRvYmUgWE1QIENvcmUgNS4zLWMwMTEgNjYuMTQ1NjYxLC  AyMDEyLzAyLzA2LTE0OjU2OjI3ICAgICAgICAiPiA8cmRmOlJE  RiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMD  IvMjItcmRmLXN5bnRheC1ucyMiPiA8cmRmOkRlc2NyaXB0aW9u  IHJkZjphYm91dD0iIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG  9iZS5jb20veGFwLzEuMC8iIHhtbG5zOnhtcE1NPSJodHRwOi8v  bnMuYWRvYmUuY29tL3hhcC8xLjAvbW0vIiB4bWxuczpzdFJlZj  0iaHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wL3NUeXBlL1Jl  c291cmNlUmVmIyIgeG1wOkNyZWF0b3JUb29sPSJBZG9iZSBQaG  90b3Nob3AgQ1M2IChXaW5kb3dzKSIgeG1wTU06SW5zdGFuY2VJ  RD0ieG1wLmlpZDo4NzI2MUI5NEJGQUExMUUyQjhGRkQ5NDFFNT  M2OUVDNCIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDo4NzI2  MUI5NUJGQUExMUUyQjhGRkQ5NDFFNTM2OUVDNCI+IDx4bXBNTT  pEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlk  Ojg3MjYxQjkyQkZBQTExRTJCOEZGRDk0MUU1MzY5RUM0IiBzdF  JlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjg3MjYxQjkzQkZBQTEx  RTJCOEZGRDk0MUU1MzY5RUM0Ii8+IDwvcmRmOkRlc2NyaXB0aW  9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQg  ZW5kPSJyIj8+UpBnrgAAA9BJREFUOE9dVG1Mm2UU7U8+2kJb+v  bjbenb2nZ89IvibCmDsDIYzMmWSWB/lkwXFxP9MY1ki27x64cxGqtgtuiCWebYoEjIRFx0sMRkDiybRF  mVuTEGDbrgGDOm0sylx3vf4GL9cZLTe89zcp77PreKcDicg1Ao  VFLn98d2uFzJ/SZz+hVVcfaQSp192mBKb3vEmaz1+WKs+f+5nB+RYPBgh92RGtI  I+M5gwZzJhiWjFfMlJiTUOgwVqtGdr8TOUluKtf89+5DU+/09XWZL5kcySDvLseYNYi2wEX9WVuGe5MayXsRCUQmSKg3ihSrs  0wsZSt6TY8TuXUYxsyiIWCOTTG0D7kZbMb+5CdON9ZiO1uFGdQ  gpRwVu6Uy4SmYjlG5viZCJVFXJyeSZtEv21PcaPdIWO/4IbsKtpg6svvYO/h4bw4PZH2Qw59q1QBSzgg2TqmIcLVCi1WJNsYeCh9dHUVd1Rvw  luTAXfRL3v7gI3FzA6rlhXO/9QAZzrnHv6sYmXKFknKorLx8Rry+m2O50JseURbinNWCpIoCVD  48Di0tIvPQCvmzehK9qfPgmUiVzrnGPNVccZRhVFuMIGTXa7Un  FXoMxfZli3qGr/VwfAWYuY7n3KM76yjFX7cFKwIcHj4ZxkzjXuMeaqdowRlQ6vJ1  XiDadPq04oFRnZ9Qa3C7SYWrPE8DvN3DxqU5MljmxotEhuw7mX  OMeayZIO1wk4P0CNdrzC7OK58iIEy2otZjsbAF++wUX9uzGecm  OX7UW3FcbZDDnGvdY821HCz7TinhXqcMuNtotGNKjNLRZSpXwV  wCJS7j90XF8YrRhylGOn8ySDOZc4x5rxkkbN7vwusaE7Xy1LTS  oY/RaE5RqQm/A4qtvAfPLmH7xZQz6qvGxySyDOde4x5pherj9riAOUKrNNimpq  PF6Y0fyCnCevtwEXW9M8uLOsTPAtUWkxy/g+sleGcy5xr3PbV7EbRX4NFCPfWo92EN+kM2iJfUepTqn1GCcB  jgqbsDM/uexEu/D3Utfy2DOtSGzG6f1dgyGtuCwuxpRcf1ByrsSCBzcpdFmuukLD  JLRCN37LD2HfkGDE1aCRYM+oRinaZlPii6cCTUhRthmsGbCgfU  VkY143zzenjYyO0xf4YTJiQHJg7hUiQGrG33WDTjlDqKfUgy2d  uKNxxrxuChlaCtyl/YhKFlUFFPPKLU4ZC1DN83gVEMbBuhwb3M73oxsxbP2SjSU2lM1  68v6L3KNCPKflscTqyu1J1sFMb1Da8ju1JmyLebSdL3DlayhvZ  I1OefCin8AZflnIYFyotMAAAAASUVORK5CYII="
	   local ConvertClass = dotNetClass "System.Convert"
	   local ImageClass = dotNetClass "System.Drawing.Image"
	   fn StringToImage str = --  http://lonerobot.net/ 
	   (
		   byteArr = ConvertClass.FromBase64String str
		   memstream = dotnetobject "System.IO.MemoryStream" byteArr
		   DecodedImg = ImageClass.fromstream memstream
		   memstream.close() ; return DecodedImg
	   )
	   rollout ui_items "ui items"
	   (
		   local bm1 = bitmap 50 50 color:red
		   local bm2 = bitmap 50 50 color:green
		   local redcol = true
		   dotnetcontrol rec_btn "CheckBox" width:25 height:25 border:false align:#center
   
		   on rec_btn MouseUp arg do
		   (
			   if rec_btn.checked then 
			   (	
				   rec_btn.image = (StringToImage rec_red)
				   rec_btn.BackColor = COL1 
			   )	
			   else 
				   rec_btn.image = (StringToImage rec_grey)
			rec_btn.FlatAppearance.BorderSize = 0
			rec_btn.UseVisualStyleBackColor =false		
		)
		   on ui_items open do
		   (
			   rec_btn.Appearance = rec_btn.Appearance.Button
			   rec_btn.FlatStyle = rec_btn.FlatStyle.Flat
			   rec_btn.UseVisualStyleBackColor = false
			   rec_btn.image = (StringToImage rec_grey)
			   rec_btn.BackColor = COL1 
			rec_btn.FlatAppearance.BorderSize = 0
			rec_btn.FlatAppearance.MouseOverBackColor = COL1
			rec_btn.FlatAppearance.MouseDownBackColor = COL1
			rec_btn.FlatAppearance.CheckedBackColor = COL1
		   )	
			   
	   )
	   createdialog ui_items width:100 height:100
   )

I want to use Popup Style.
This style displays another square – a grey one.

rec_btn.flatstyle = (dotnetclass “System.Windows.Forms.Flatstyle”).PopUp

rec_btn.FlatAppearance.BorderSize = 0
does not help this time.

I need to use this style because I have some other simple max btns, and I want to keep the look and feel.

I love also
rec_btn.flatstyle = (dotnetclass “System.Windows.Forms.Flatstyle”).System

• It doesn’t display this square, but unfortunatelly it doesnt display the image of the btn as well.

I want finally a simple max btn (or any dotnet btn that will look the same) with encoded image – not bmp file

Method that you use is ok but in general I not like to see big length of base64 string.
With this function you can break and merge base64 string with simple multidimensional array.
Maybe there is better approch … Anyway

  fn breakBase64 str =
 (
 	local arr = #("",str.count,#())
 	local sysStr = (dotNetclass "System.String")
 	local newStr = dotnet.ValueToDotNetObject arr[1] sysStr
 	for s in 1 to str.count do
 	(
 		if (idx = (newStr.indexOf str[s])+1) > 0 then append arr[3][idx] s else
 		(
 			append arr[3] #(s)
 			newStr = dotnet.ValueToDotNetObject (arr[1]+=str[s]) sysStr 
 		)
 	) ; arr
 )
 fn mergeBase64 data =
 (
 	local sysStr = (dotNetclass "System.String"), strArr = #(), strArr[data[2]] = ""
 	for i = 1 to data[3].count do (for j in data[3][i] do strArr[j] = data[1][i])
 	sysStr.Concat strArr
 )
 
 -- example
 str = "AajKmdj0UjKkpdfakUikass058kd52RTiyrRyT891646sdsd6FFg66wwe8d2221ersrdfvkjxkjwewQPIuskQeryud"
 breakB64Data = breakBase64 str
 base64FromData = mergeBase64 breakB64Data
 -- verify the identity
 str == base64FromData
  

Thank you, Branko! Thank you for the record btn, it’s looking now exactly as I want.
In addition, I need to make some other btns like in the image bellow, that should work for both – light and dark max UI.

and here is the first btn icon with alpha

local create_cam = "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"

to make any other them rectangle shape for .net button is not a problem (image with alpha, custom region, etc.)
the real pain is to make focus frame (dotted rectangle around focused control) not rectangle shape

That’s always a problem

Tell me please, do you find this concept good or not? If yes, then how to find out if the scheme is dark in order to draw icons for dark scheme?

download btns script