AnnThumbStyle Class

Summary

Base class for all thumb styles.

Syntax

Objective-C

C++

Java

public abstract class AnnThumbStyle : IAnnThumbStyle

Public MustInherit Class AnnThumbStyle  
   Implements IAnnThumbStyle

@interface LTAnnThumbStyle : NSObject <LTIAnnThumbStyle, NSCopying>

public abstract class AnnThumbStyle implements IAnnThumbStyle

public: 
   ref class AnnThumbStyle abstract : IAnnThumbStyle

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

Target Platforms

Reference

AnnThumbStyle Members

Leadtools.Annotations.Rendering Namespace

Programming with LEADTOOLS Annotations

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Help Version 20.0.2020.3.31

Leadtools.Annotations.Rendering.WinForms Assembly

Introduction

Getting Started

Namespaces

Leadtools.Annotations.Rendering Namespace

Assemblies