ImageEn, unit iexUserInteractions



TIECropToolInteraction = class(TIEUserInteraction);


A class of TIEUserInteraction that controls interaction for the crop tool (when MouseInteractGeneral is miCropTool).

The crop tool allows the user to select an area of the image to keep and then click "Enter" to apply the crop. The selection can be rotated to rotate the image before cropping.
Also, if the Mode is set to iectmPerspective, the perspective correction can be performed.

In Crop Tool mode:
 User can resize crop box by dragging grips
 User can rotate crop by dragging outside grips
 User can click "Enter" to enact the crop
 User can click "Esc" to cancel the crop

 Specify the color of the crop selection using SelColor1 and SelColor2
 Specify the style of crop selection grips using SetSelectionGripStyle
 Hold the Shift key to force rotation in 15 deg. increments


Demo  Demos\ImageEditing\CropTool\CropTool.dpr

Rectangular Crop (with optional rotation)

// Enable crop mode
ImageEnView1.MouseInteractGeneral := [miCropTool];
ImageEnView1.CropTool.Mode := iectmRectangle;

Perspective Fix

// Enable Perspective fixing mode
ImageEnView1.MouseInteractGeneral := [miCropTool];
ImageEnView1.CropTool.Mode := iectmPerspective;


// Disable guide lines (on image thirds)
ImageEnView1.CropTool.DrawGuides := False;

// High quality cropping when rotated
ImageEnView1.CropTool.AntialiasMode := ierBicubic;

// Enact crop (same as user clicking "Enter")

// Cancel crop tool (same as user clicking "Esc")

Methods and Properties

General Properties
Public Property  AntialiasMode
Public Property  DrawGuides
Public Property  LockAspectRatio
Public Property  LockWidth
Public Property  LockHeight
Public Property  Mode
Public Property  Options

Public Property  BitmapPolygon
Public Method  GetBitmapPolygon
Public Property  Rotation (Same as rotating selection)
Public Property  RotatedPolygon
Public Property  ScreenPolygon
Public Property  Selected
Public Method  SetBitmapPolygon (Same as resizing selection)
Public Property  State

Command Methods
Public Method  Cancel (Same as clicking "Esc")
Public Method  Enact (Same as clicking "Enter")

See Also

 ImageEn Interactive Tools
 TImageEnView Actions