Colorpicker

0.0.3

ColorPicker.psm1

                                <#

.SYNOPSIS

    Simple colorpicker

.DESCRIPTION

    Simple colorpicker made using Windows Forms in PowerShell. Select pixel on screen and get HEX + RGB color value.

.AUTHOR

    EW

.COPYRIGHT

    No

.LICENSE

    None

.VERSION

    0.0.3

.NOTES

    ...

.EXAMPLE

    Get-Color

#>

# Helper to poll mouse button state without blocking the UI

New-Alias -Name Color -Value Get-Color

$CSharpGetAsyncKeyState = @"

using System;

using System.Runtime.InteropServices;

public static class Native {

  [DllImport("user32.dll")] public static extern short GetAsyncKeyState(int vKey);

}

"@

Add-Type -Language CSharp -TypeDefinition $CSharpGetAsyncKeyState

Function Get-Color {

    Start-ThreadJob -Name "ColorPicker" -ScriptBlock {

        Add-Type -AssemblyName System.Windows.Forms

        Add-Type -AssemblyName System.Drawing

        Function Get-PixelColorAtCursor {

            $Position = [System.Windows.Forms.Cursor]::Position

            $Bitmap = New-Object System.Drawing.Bitmap 1,1

            $Graphics = [System.Drawing.Graphics]::FromImage($Bitmap)

            $Graphics.CopyFromScreen($Position, [System.Drawing.Point]::Empty, $Bitmap.Size)

            $Graphics.Dispose()

            $C = $Bitmap.GetPixel(0,0)

            $Bitmap.Dispose()

            $C

        }

        $Form = New-Object System.Windows.Forms.Form

        $Form.Text = 'Color Picker'

        $Form.StartPosition = 'CenterScreen'

        $Form.Size = New-Object System.Drawing.Size(380,180)

        $Form.FormBorderStyle = 'FixedDialog'

        $Form.MaximizeBox = $false

        $Form.KeyPreview = $true

        $Preview = New-Object System.Windows.Forms.Panel

        $Preview.Size = New-Object System.Drawing.Size(80,80)

        $Preview.Location = New-Object System.Drawing.Point(20,20)

        $Preview.BorderStyle = 'FixedSingle'

        $Form.Controls.Add($Preview)

        $Label_Hex = New-Object System.Windows.Forms.Label

        $Label_Hex.AutoSize = $true

        $Label_Hex.Location = New-Object System.Drawing.Point(120,30)

        $Label_Hex.Add_MouseEnter({ $Label_Hex.ForeColor = [System.Drawing.Color]::FromArgb(100,100,100) })

        $Label_Hex.Add_MouseLeave({ $Label_Hex.ForeColor = [System.Drawing.Color]::FromArgb(0,0,0) })

        $Label_Hex.Add_Click({

            $ClipB = $Label_Hex.Text -replace "^HEX: "

            if ($ClipB) {

                [System.Windows.Forms.Clipboard]::SetText($ClipB)

            }

            $Label_Hex.ForeColor = [System.Drawing.Color]::FromArgb(255,255,255)

            Start-Sleep -Seconds 0.2    

            $Label_Hex.ForeColor = [System.Drawing.Color]::FromArgb(100,100,100)

        })

        $Form.Controls.Add($Label_Hex)

        $Label_RGB = New-Object System.Windows.Forms.Label

        $Label_RGB.AutoSize = $true

        $Label_RGB.Location = New-Object System.Drawing.Point(120,60)

        $Label_RGB.Add_MouseEnter({ $Label_RGB.ForeColor = [System.Drawing.Color]::FromArgb(100,100,100) })

        $Label_RGB.Add_MouseLeave({ $Label_RGB.ForeColor = [System.Drawing.Color]::FromArgb(0,0,0) })

        $Label_RGB.Add_Click({

            $ClipB = $Label_RGB.Text -replace "^RGB: " -replace "\w=" -replace "\s", ','

            if ($ClipB) {

                [System.Windows.Forms.Clipboard]::SetText($ClipB)

            }

            $Label_RGB.ForeColor = [System.Drawing.Color]::FromArgb(255,255,255)

            Start-Sleep -Seconds 0.2    

            $Label_RGB.ForeColor = [System.Drawing.Color]::FromArgb(100,100,100)

        })

        $Form.Controls.Add($Label_RGB)

        $Button_ColorDialog = New-Object System.Windows.Forms.Button

        $Button_ColorDialog.Text = "Colorpicker"

        $Button_ColorDialog.Size = New-Object System.Drawing.Size(110,30)

        $Button_ColorDialog.Location = New-Object System.Drawing.Point(120,100)

        $Form.Controls.Add($Button_ColorDialog)

        $Button_SampleScreen = New-Object System.Windows.Forms.Button

        $Button_SampleScreen.Text = "Sample screen"

        $Button_SampleScreen.Size = New-Object System.Drawing.Size(110,30)

        $Button_SampleScreen.Location = New-Object System.Drawing.Point(240,100)

        $Form.Controls.Add($Button_SampleScreen)

        # Helpers to show a color

        $ShowColor = {

            param([System.Drawing.Color]$C)

            $Preview.BackColor = $C

            $Label_Hex.Text  = "HEX: " + ("#{0:X2}{1:X2}{2:X2}" -f $C.R,$C.G,$C.B)

            $Label_RGB.Text = "RGB: " + ("R={0} G={1} B={2}" -f $C.R,$C.G,$C.B)

        }

        # Show system Color dialog. Set preview color and add hex to clipboard when clicking ok.

        $Button_ColorDialog.Add_Click({

            $ColorDialog = New-Object System.Windows.Forms.ColorDialog

            $ColorDialog.FullOpen = $true

            $ColorDialog.AnyColor = $true

            if ($ColorDialog.ShowDialog() -eq 'OK') {

                & $ShowColor $ColorDialog.Color

                $ClipB = $Label_Hex.Text -replace "^HEX: "

                if ($ClipB) {

                    [System.Windows.Forms.Clipboard]::SetText($ClipB)

                }

                $ColorDialog.Dispose()

            }

        })

        # Eyedropper triggers when clicking the "Sample Screen" button

        $Button_SampleScreen.Add_Click({

            # Parameters

            $SampleSize = 30                 # 30x30 pixels around the cursor

            $LoupeScale = 4                  

            $LoupeSize  = $SampleSize * $LoupeScale # 120x120 magnify view

            $LoupeOffset = New-Object System.Drawing.Point(24,24)  # Move the magnify preview away from the mouse pointer

            # Create the magnify window

            $Loupe = New-Object System.Windows.Forms.Form

            $Loupe.FormBorderStyle = 'None'

            $Loupe.ShowInTaskbar = $false

            $Loupe.TopMost = $true

            $Loupe.StartPosition = 'Manual'

            $Loupe.Size = New-Object System.Drawing.Size($LoupeSize, $LoupeSize)

            $Loupe.BackColor = [System.Drawing.Color]::Black    # just in case we see behind image

            $Loupe.Opacity = 0.98

            # This will contain the magnify image

            $LoupeImg = $null

            # Timer used to update position + bitmap from background

            $Timer = New-Object System.Windows.Forms.Timer

            $Timer.Interval = 16   # ~60 FPS

            # Pre-create bitmaps to avoid allocations on every tick (60 times per second)

            $PixelFormat = [System.Drawing.Imaging.PixelFormat]::Format32bppArgb    

            $SrcBmp  = New-Object System.Drawing.Bitmap ($SampleSize, $SampleSize, $PixelFormat)

            $DstBmp  = New-Object System.Drawing.Bitmap ($LoupeSize, $LoupeSize, $PixelFormat)

            # Screen bounds (multi-monitor aware)

            $VirtualScreen = [System.Windows.Forms.SystemInformation]::VirtualScreen

            #Logic that runs over and over when picker is active:

            $UpdateLoupe = {

                # Where's the pointer?

                $Position = [System.Windows.Forms.Cursor]::Position

                # Keep the 50x50 capture fully on-screen

                $SrcX = [Math]::Max($VirtualScreen.Left,  [Math]::Min($Position.X - [int]($SampleSize/2), $VirtualScreen.Right  - $SampleSize))

                $SrcY = [Math]::Max($VirtualScreen.Top,   [Math]::Min($Position.Y - [int]($SampleSize/2), $VirtualScreen.Bottom - $SampleSize))

                # Capture 50x50 around cursor

                $GraphicsSrc = [System.Drawing.Graphics]::FromImage($SrcBmp)

                $GraphicsSrc.CopyFromScreen($SrcX, $SrcY, 0, 0, $SrcBmp.Size)

                $GraphicsSrc.Dispose()

                # Scale up to the loupe size (nearest-neighbor for crisp pixels)

                $GraphicsDst = [System.Drawing.Graphics]::FromImage($dstBmp)

                $GraphicsDst.CompositingMode  = [System.Drawing.Drawing2D.CompositingMode]::SourceCopy

                $GraphicsDst.CompositingQuality = [System.Drawing.Drawing2D.CompositingQuality]::HighSpeed

                $GraphicsDst.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::NearestNeighbor

                $GraphicsDst.PixelOffsetMode  = [System.Drawing.Drawing2D.PixelOffsetMode]::Half

                $GraphicsDst.SmoothingMode    = [System.Drawing.Drawing2D.SmoothingMode]::None

                $GraphicsDst.Clear([System.Drawing.Color]::Black)

                $Rectangle = New-Object System.Drawing.Rectangle(0,0,$LoupeSize,$LoupeSize)

                $GraphicsDst.DrawImage($SrcBmp, $Rectangle)

                # Draw a crosshair in center of the loupe

                $Pen1 = New-Object System.Drawing.Pen ([System.Drawing.Color]::White), 1

                $Pen2 = New-Object System.Drawing.Pen ([System.Drawing.Color]::Black), 1

                $CX = [int]($LoupeSize/2)

                $CY = [int]($LoupeSize/2)

                # First white, then black (contrast)

                $GraphicsDst.DrawLine($Pen1, $CX, 0, $CX, $LoupeSize)

                $GraphicsDst.DrawLine($Pen1, 0, $CY, $LoupeSize, $CY)

                $GraphicsDst.DrawLine($Pen2, $CX+1, 0, $CX+1, $LoupeSize)

                $GraphicsDst.DrawLine($Pen2, 0, $CY+1, $LoupeSize, $CY+1)        

                $Pen1.Dispose()

                $Pen2.Dispose()

                $GraphicsDst.Dispose()

                # Swap into the loupe form

                if ($LoupeImg) { $Loupe.BackgroundImage.Dispose() }

                $LoupeImg = [System.Drawing.Bitmap]$dstBmp.Clone()

                $Loupe.BackgroundImage = $LoupeImg

                $Loupe.BackgroundImageLayout = 'Stretch'

                # Position the loupe near the cursor (clamp on-screen)

                $LocationX = $Position.X + $LoupeOffset.X

                $LocationY = $Position.Y + $LoupeOffset.Y

                if ($LocationX + $Loupe.Width  -gt $VirtualScreen.Right)  { $LocationX = $Position.X - $LoupeOffset.X - $Loupe.Width }

                if ($LocationY + $Loupe.Height -gt $VirtualScreen.Bottom) { $LocationY = $Position.Y - $LoupeOffset.Y - $Loupe.Height }

                if ($LocationX -lt $VirtualScreen.Left)   { $LocationX = $VirtualScreen.Left }

                if ($LocationY -lt $VirtualScreen.Top)    { $LocationY = $VirtualScreen.Top  }

                $Loupe.Location = New-Object System.Drawing.Point($LocationX, $LocationY)

            }

            $TickHandler = {

                # Keep UI awake

                [System.Windows.Forms.Application]::DoEvents()

                & $UpdateLoupe

            }

            try {

                # Remember and hide the picker window so it doesn't block the pixel under cursor

                $WasTopMost = $Form.TopMost

                $Form.TopMost = $false

                $Form.Hide()

                Start-Sleep -Milliseconds 60

                # Show loupe and start updating

                $Loupe.Show()

                $Timer.Add_Tick($TickHandler)

                $Timer.Start()

                # Crosshair cursor while picking        

                [System.Windows.Forms.Cursor]::Current = [System.Windows.Forms.Cursors]::Cross

                # Wait for next *press* of the left mouse button (VK_LBUTTON = 0x01)

                while ($true) {

                    [System.Windows.Forms.Application]::DoEvents()

                    Start-Sleep -Milliseconds 10

                    $State = [Native]::GetAsyncKeyState(0x01)

                    if (($State -band 0x8000) -ne 0) {

                        while(([Native]::GetAsyncKeyState(0x01) -band 0x8000) -ne 0) {

                            Start-Sleep -Milliseconds 5

                        }

                        break

                    }

                    # Allow cancel with Esc

                    if ([Native]::GetAsyncKeyState(0x1B) -band 0x8000) {

                        throw 'Canceled'

                    }

                }

                # Final read uses your existing helper

                $C = Get-PixelColorAtCursor

                & $ShowColor $C

            }

            catch {

                if ($_.Exception.Message -eq 'Canceled') {

                    $Label_Hex.Text = 'Pick canceled'

                    $Label_RGB.Text = ''

                }

            }

            finally {

                # Stop timer and clean up loupe resources

                $Timer.Stop()

                $Timer.Remove_Tick($TickHandler)

                $Timer.Dispose()

                if ($LoupeImg) {

                    $Loupe.BackgroundImage.Dispose()

                    $LoupeImg.Dispose()

                }

                $Loupe.Close()

                $Loupe.Dispose()

                $SrcBmp.Dispose()

                $DstBmp.Dispose()

                # Restore cursor and main form

                [System.Windows.Forms.Cursor]::Current = [System.Windows.Forms.Cursors]::Default

                $Form.Show()

                $Form.TopMost = $WasTopMost

                $Form.Activate()

            }

        })

        # Copy HEX to clipboard if preview color is clicked

        $Preview.Add_Click({

            $ClipB = $Label_Hex.Text -replace "^HEX: "

            if ($ClipB) {

                [System.Windows.Forms.Clipboard]::SetText($ClipB)

            }

        })

        # Allow closing form with escape key

        $Form.Add_KeyDown({

            if ($_.KeyCode -eq 'Escape') {

                $Form.Close()

            }

        })

        [System.Windows.Forms.Application]::EnableVisualStyles()

        & $ShowColor ([System.Drawing.Color]::FromArgb(255, 32, 32, 32))

        [void]$Form.ShowDialog()

    } | Out-Null

}