Draw: set Adjustment Values for Custom shapes

Introduction

Many shapes like ring, smiley or callout had a yellow handle to modify a specific parameter.

But it only set up with mouse. It unable to set up with a dialogbox if you need a fine adjustment.

These shape are designed by a specific handle (yellow colored).

Each shape can have one or more yellow handles.

Some shapes with one handle

Some shapes with two or more handles

If you inspect the SvxShapeText object through API, you have a CustomShapeGeometry property.

This property result a structure of 6 arrays com.sun.star.beans.PropertyValue.
The 3th array is named AdjustmentValues
This structure contains a variant named Value
This Value is a com.sun.star.drawing.EnhancedCustomShapeAdjustmentValue structure
Depending on the number of handles, the number of structures varies.
Each structure contains a default Value (type variant).

Default value of shape with one handle:

Default values of shape with more handles:

The "left-right-arrow-callout" with 3 yellow handles match to 4 structures:

Proposal of a new design for "Position and size" dialog.

A specific tab will be added. It is much easy to set up these values in dialog.

Sample dialog for smiley shape:

The adjustment value of the smile is in degrees.

==