ZOOMVIEWPROPS

Member

Description

uStructSize

Size of this structure in bytes, for versioning. Use the sizeof(ZOOMVIEWPROPS).macro to calculate this value. This must be set before passing this structure to the LEADTOOLS functions.

uIndex

A zero-based index of this Zoom View. This index is zero-based. This member is updated by the AddZoomView and the DestroyZoomView functions. Set this value before calling the GetZoomViewProps or the UpdateZoomView functions.

rcSrc

Rectangle describing the source area of the image to be zoomed, in bitmap coordinates. The values describing this rectangle must be multiplied by 100.

rcDst

Rectangle describing the location on the display of the zoomed view, in screen coordinates. By default, only the TOP_LEFT is used. The values describing this rectangle must be multiplied by 100.

rcView

This member is obsolete.

nZoom

The percentage zoom factor for the zoomed view; 100 = no zoom. Value must be >= 100.

bForceDst

Flag that indicates whether the zoomed view should be forced to be the size of rcDst.

Value

Meaning

TRUE

Force the zoomed view to the size of rcDst.

FALSE

Allow LEADTOOLS to calculate the size based on nZoom and rcSrc. The top and left values of rcDst are used for positioning.

bEnabled

Flag that indicates whether the zoomed view is enabled. If the zoomed view is not enabled, then it will not be displayed.

Value

Meaning

TRUE

The zoomed view is enabled.

FALSE

The zoomed view will not be displayed.

uZoomViewBorderStyle

Value that represents the border style to be used for the Zoom View. Possible values are:

Value

Meaning

ZOOMVIEWBORDERSTYLE_NONE

[0x0000] Do not use a border for the Zoom View.

ZOOMVIEWBORDERSTYLE_SIMPLE

[0x0001] Use a flat border for a rectangular, rounded rectangular and Torn out Zoom View.

ZOOMVIEWBORDERSTYLE_3D

[0x0002] Use a 3D border for a rectangular Zoom View.

ZOOMVIEWBORDERSTYLE_TEAROUT

[0x0004] Use a border that has a Torn out look for the Zoom View.

ZOOMVIEWBORDERSTYLE_ROUNDED

[0x0008] Use a rounded rectangular border for the Zoom View. This can be OR-ed with ZOOMVIEWBORDERSTYLE_NONE or ZOOMVIEWBORDERSTYLE_SIMPLE.

The following figures display the different border styles that are available:

crZoomViewBorder

A COLORREF value that specifies the color of the border of the Zoom View. This member can only be used when uZoomViewBorderStyle is ZOOMVIEWBORDERSTYLE_SIMPLE.

nZoomViewPenStyle

Value that represents the pen style to be used for the Zoom View Border. This value is only used when uZoomViewBorderStyle is ZOOMVIEWBORDERSTYLE_SIMPLE. These are the same values as the ones used in the CreatePen Windows GDI function, like PS_SOLID or PS_DASH. For more information, refer to the Windows GDI section on MSDN.

hBorderRgn

Reserved for future use. Pass NULL.

uSrcBorderStyle

Value that represents the border style to be used on the source rectangle. Possible values are:

Value

Meaning

SOURCEBORDERSTYLE_SIMPLE

[0x0000] Use a flat border on the source rectangle.

SOURCEBORDERSTYLE_3D

[0x0001] Use a 3D border on the source rectangle.

The following figure displays the different border styles that are available:

crSrcBorder

COLORREF value that specifies the color of the border on the source rectangle. This value is only used when uSrcBorderStyle is SOURCEBORDERSTYLE_SIMPLE.

nSrcPenStyle

Value that represents the pen style to be used on the source rectangle for the Zoom View. This value is only used when uSrcBorderStyle is SOURCEBORDERSTYLE_SIMPLE.

These are the same values as the ones used in the CreatePen Windows GDI function, such as PS_SOLID or PS_DASH. For more information, refer to the Windows GDI section on MSDN.

bCallouts

Flag that indicates whether to enable callout lines. Possible values are:

Value

Meaning

TRUE

Enable callout lines for the zoomed view.

FALSE

Disable callout lines for the zoomed view.

crCallout

COLORREF value that specifies the color of the callout lines. This member is ignored when bCallouts is FALSE.

nCalloutPenStyle

Value that specifies the pen style to be used for connected source and destination rectangles for the Zoom View. This value is ignored when bCallouts is FALSE.

These are the same values as the ones used in the CreatePen Windows GDI function, such as PS_SOLID or PS_DASH. For more information, refer to the Windows GDI section on MSDN.

hAnnContainer

Handle to the root container object of an annotation object to be displayed. If NULL, no annotation will be displayed in the zoom view.

nSrcPenWidth

Value that represents the pen width in pixels, to be used on the source rectangle for the Zoom View. This value is only used when uSrcBorderStyle is SOURCEBORDERSTYLE_SIMPLE.These are the same values as the ones used in the CreatePen Windows GDI function. For more information, refer to the Windows GDI section on MSDN.

nZoomViewPenWidth

Value that represents the pen width in pixels, to be used for the Zoom View border. This value is only used when uZoomViewBorderStyle is ZOOMVIEWBORDERSTYLE_SIMPLE.

These are the same values as the ones used in the CreatePen Windows GDI function. For more information, refer to the Windows GDI section on MSDN.

nCalloutPenWidth

Value that represents the pen width in pixels, to be used for connected source and destination rectangles for the Zoom View. This value is ignored when bCallouts is FLASE.

These are the same values as the ones used in the CreatePen Windows GDI function. For more information, refer to the Windows GDI section on MSDN.