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AnnThumbStyle Class
Summary
Base class for all thumb styles.
Syntax
public abstract class AnnThumbStyle : Leadtools.Annotations.Core.Leadtools.Annotations.Core.IAnnThumbStylePublic MustInherit Class AnnThumbStyleImplements Leadtools.Annotations.Core.Leadtools.Annotations.Core.IAnnThumbStyle
public sealed class AnnThumbStyle : Leadtools.Annotations.Core.Leadtools.Annotations.Core.IAnnThumbStyle@interface LTAnnThumbStyle : NSObject <LTIAnnThumbStyle, NSCopying>public abstract class AnnThumbStyle implements IAnnThumbStylefunction Leadtools.Annotations.Rendering.AnnThumbStyle()Remarks
AnnThumbStyle is the default thumb style and renderer for the annotation objects in this platform. This is an abstract class that will implement most common operations, while actual rendering of the object is implemented in the derived class for the objects.
LEADTOOLS ships with the following thumb style implementations:
-
AnnRectangleThumbStyle: Rectangle thumb style
-
AnnEllipseThumbStyle: Ellipse thumb style
AnnObjectRenderer is the class responsible for rendering annotation objects, as well as rendering the objects themselves, the object renderer is responsible for rendering the thumbs used when the object is in a selected state.
The framework will call AnnObjectRenderer.RenderThumbs and AnnObjectRenderer.RenderRotatePointThumbs to render the selection and rotation thumbs at a specified location. These method will then call the AnnThumbStyle.Render of its LocationsThumbStyle, RotateCenterThumbStyle and RotateGripperThumbStyle objects to render the actual thumbs.
The annotations thumb style contains the following members:
| Member | Description |
|---|---|
| Size |
The size of the thumb in container units. |
| Fill |
The style to use for filling the thumb. |
| Stroke |
The style to use for drawing the thumb. |
| Render |
Called by the framework to render a thumb at a specified location. |
| HitTest |
Called by the framework to check if a test point is on top of the thumb if rendered at a specified location. |
When implementing a user-defined thumb style, one of the tasks required is to render the thumbs of an annotation object. You can derive your thumb style from this class and use its helper methods.
Requirements
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© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
Leadtools.Annotations.Rendering Assembly
