AnnD2DThumbStyle Class

Summary

Base class for all thumb styles.

Syntax

public abstract class AnnD2DThumbStyle : IAnnThumbStyle

Remarks

AnnD2DThumbStyle 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:

AnnD2DRectangleThumbStyle: Rectangle thumb style
AnnD2DEllipseThumbStyle: Ellipse thumb style

AnnD2DObjectRenderer 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 AnnD2DObjectRenderer.RenderThumbs and AnnD2DObjectRenderer.RenderRotatePointThumbs to render the selection and rotation thumbs at a specified location. These method will then call the AnnD2DThumbStyle.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

AnnD2DThumbStyle Members

Leadtools.Annotations.Rendering Namespace

Programming with LEADTOOLS Annotations

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Help Version 22.0.2022.12.13

Leadtools.Annotations.Rendering.WinForms Assembly

Introduction

Getting Started

Namespaces

Leadtools.Annotations.Rendering Namespace

Assemblies