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MrCreatoR

Need Function to check white/black shades of certain color

3 posts in this topic

Hi there,

I need a function to check if certain color is a shade of white or black (dark) color, i searched on the forum, but didn't find anything that might help with my task.

Basicaly i need to update a label (it's background) with some color, and then set color for the control, but if the background color is dark, and the label text color dark as well (set by user), the text is almoust unreadable.

Here is an example of what i am using for now:

#include <GuiConstants.au3>

$Bk_Color = 0x000000 ;0xFFFFFF
$Color = 0x000000

$GUI = GUICreate("Test Script", 300, 200)

GUICtrlCreateLabel("Some Text", 20, 40, 55, 14)
GUICtrlSetBkColor(-1, $Bk_Color)

If $Bk_Color = 0x000000 Then $Color = 0xFFFFFF
GUICtrlSetColor(-1, $Color)


GUISetState(@SW_SHOW, $GUI)

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit
    EndSwitch
WEnd

So here i check if the back color is black, and if it does i just set the text color to white... but if the colors are little different, but still have black/white shade, text color not readable very well :).

Is there maybe a method to check color for «darknest/whitnest»? :)

Thanks.


 

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You can use _ColorGetBlue/Red/Green and do a calculation with those values.

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#3 ·  Posted (edited)

You can use _ColorGetBlue/Red/Green and do a calculation with those values.

Big thanks! :)

Here is what i needed i think:

#include <GuiConstants.au3>
#include <Misc.au3>

Global $Bk_Color = 0xFFFFFF

$GUI = GUICreate("_ColorIsDarkShade Demo", 300, 200)

$Label = GUICtrlCreateLabel("Some Text", 20, 40, 55, 14)
GUICtrlSetBkColor(-1, $Bk_Color)

$ColorSet_Button = GUICtrlCreateButton("Set Color", 20, 80)

GUISetState(@SW_SHOW, $GUI)

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit
        Case $ColorSet_Button
            $Bk_Color = _ChooseColor(2, $Bk_Color, 2, $GUI)
            
            GUICtrlSetBkColor($Label, $Bk_Color)
            GUICtrlSetColor($Label, 0x0)
            
            If _ColorIsDarkShade($Bk_Color) Then GUICtrlSetColor($Label, 0xFFFFFF)
    EndSwitch
WEnd

Func _ColorIsDarkShade($nColor)
    Local $i_Red = BitAND(BitShift($nColor, 16), 0xFF)
    Local $i_Green = BitAND(BitShift($nColor, 8), 0xFF)
    Local $i_Blue = BitAND($nColor, 0xFF)
    
    Local $iMidle_Color_Val = Int(765 / 2) ;765 is the total of 255 + 255 + 255
    
    Return ($i_Red + $i_Green + $i_Blue) < $iMidle_Color_Val
EndFunc

Edit: Changed the example.

Edited by MsCreatoR

 

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AutoIt_Icon_small.pngProjects: ATT - Application Translate Tool {new}| BlockIt - Block files & folders {new}| SIP - Selected Image Preview {new}| SISCABMAN - SciTE Abbreviations Manager {new}| AutoIt Path Switcher | AutoIt Menu for Opera! | YouTube Download Center! | Desktop Icons Restorator | Math Tasks | KeyBoard & Mouse Cleaner | CaptureIt - Capture Images Utility | CheckFileSize Program

AutoIt_Icon_small.pngUDFs: OnAutoItErrorRegister - Handle AutoIt critical errors {new}| AutoIt Syntax Highlight {new}| Opera Library! | Winamp Library | GetFolderToMenu | Custom_InputBox()! | _FileRun UDF | _CheckInput() UDF | _GUIInputSetOnlyNumbers() UDF | _FileGetValidName() UDF | _GUICtrlCreateRadioCBox UDF | _GuiCreateGrid() | _PathSplitByRegExp() | _GUICtrlListView_MoveItems - UDF | GUICtrlSetOnHover_UDF! | _ControlTab UDF! | _MouseSetOnEvent() UDF! | _ProcessListEx - UDF | GUICtrl_SetResizing - UDF! | Mod. for _IniString UDFs | _StringStripChars UDF | _ColorIsDarkShade UDF | _ColorConvertValue UDF | _GUICtrlTab_CoverBackground | CUI_App_UDF | _IncludeScripts UDF | _AutoIt3ExecuteCode | _DragList UDF | Mod. for _ListView_Progress | _ListView_SysLink | _GenerateRandomNumbers | _BlockInputEx | _IsPressedEx | OnAutoItExit Handler | _GUICtrlCreateTFLabel UDF | WinControlSetEvent UDF | Mod. for _DirGetSizeEx UDF
 
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