TImageEnView.SelectMagicWand

Declaration

procedure SelectMagicWand(x, y: Integer; Op: TIESelOp = iespReplace; CheckAlpha: Boolean = False);

Description

Selects an irregular region that has similar colors.

It uses the following properties:
◼MagicWandMode
◼MagicWandSize
◼MagicWandTolerance
◼MagicWandMaxFilter

Parameter	Description
x	Starting horizontal coordinate
y	Starting vertical coordinate
Op	If Op is iespReplace the region replaces the existing selection, otherwise if Op is iespAdd, the region is appended to the existing selection
CheckAlpha	If true, it also considers the AlphaChannel when matching

Note:
◼If SelectionBase = iesbClientArea then x and y are assumed to be visible points on the control. If iesbBitmap, the points specify a position on the bitmap.
◼This is the programmatic equivalent of setting miSelectMagicWand in MouseInteractGeneral
◼MagicWandMode determines the nature of the magic wand selection. For iewInclusive a "vectorized" selection is created (i.e. the selection will be made up of a series of lines and can be accessed via PolySel). For other types a "bitmap" selection is used (to determine whether specific pixels are selected, use IsPointInsideSelection)
◼View a preview of all selection types

Demo

Demos\ImageEditing\EveryMethod\EveryMethod.dpr

Example

Also see: Automated Samples

// Create a "flood fill" type selection and discard red and green channels
ImageEnView1.MagicWandTolerance := 24;
ImageEnView1.MagicWandSize := 1;
ImageEnView1.SelectionBase := iesbBitmap;
ImageEnView1.SelectMagicWand( 588, 217 );

ImageEnView1.Proc.Proc.DisposeChannels( 'B00' );

Other Selection Methods

◼Select
◼SelectEllipse
◼SelectChromaKey
◼SelectRoundRect
◼SelectShape
◼SelectCustom

View a preview of all selection types

TImageEnView.SelectMagicWand