Gradient Graphic Generator (UDF)

[JFee]

This is my first time posting a UDF, so here goes... muttley

Returns the ControlID of a gradient graphic with dimensions $w by $h, at position $x, $y.

The gradient is linear from $startColor to $endColor horizontally, unless $vertical = 1. You can choose the number of steps the gradient uses, but by default its is the length of the image.

Hope you like it! Please let me know if there is anything that should be added or changed

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Func _createGradient($startColor, $endColor, $w, $h, $x, $y, $iSteps = -1, $vertical = 0)
    If $iSteps = -1 And $vertical = 1 Then $iSteps = $h
    If $iSteps = -1 And $vertical = 0 Then $iSteps = $w
    $gradient = GUICtrlCreateGraphic($x, $y, $w, $h)
    $startColor = StringTrimLeft($startColor, 2)
    $endColor = StringTrimLeft($endColor, 2)
    $startRed = "0x" & StringLeft($startColor, 2)
    $startGreen = "0x" & StringMid($startColor, 3, 2)
    $startBlue = "0x" & StringRight($startColor, 2)
    $endRed = "0x" & StringLeft($endColor, 2)
    $endGreen = "0x" & StringMid($endColor, 3, 2)
    $endBlue = "0x" & StringRight($endColor, 2)
    For $x = 1 To $w
        For $y = 1 To $h
            
            GUICtrlSetGraphic($gradient, $GUI_GR_MOVE, $x, $y)
            If $vertical = 0 Then
                $currentStep = Int($x / $w * $iSteps)
            ElseIf $vertical = 1 Then
                $currentStep = Int($y / $h * $iSteps)
            Else
                Return 0
            EndIf
            $stepRed = Hex($startRed + $currentStep * (($endRed - $startRed) / $iSteps), 2)
            $stepGreen = Hex($startGreen + $currentStep * (($endGreen - $startGreen) / $iSteps),2)
            $stepBlue = Hex($startBlue + $currentStep * (($endBlue - $startBlue) / $iSteps),2)
            
            $color = "0x" & $stepRed & $stepGreen & $stepBlue
            
            GUICtrlSetGraphic($gradient, $GUI_GR_COLOR, $color)
            GUICtrlSetGraphic($gradient, $GUI_GR_PIXEL, $x, $y)
        Next
        
    Next

    GUICtrlSetGraphic($gradient, $GUI_GR_REFRESH)
    
    Return $gradient
EndFunc

Edited July 14, 2008 by JFee