Java Reference
In-Depth Information
Getting started
Before you can apply transformations to shapes, you must be familiar with the steps required
to create simple shapes using JavaFX. See Drawing simple shapes from Chapter 2 , Creating
JavaFX Applications for background information on creating simple shapes.
The classes for the Transformation API are kept in the package javafx.scene.
transform . You will find several classes there used for different types of transformation,
including Rotate , Scale , Shear , and Translate .
How to do it...
To demonstrate the Transformation API, the next code snippet shows the usage of both the
Translate and the Scale transformations on a Rectangle shape. You can get the full
code listing from ch03/source-code/src/transformation/TransformDemo.fx .
def w = 400;
def h = 200;
def rect:Rectangle = Rectangle {
x: 0 y: 0
width: w - 300
height: h - 150;
fill: Color.BLUE;
stroke: Color.WHITE;
strokeWidth: 3
rect.transforms = [
Translate {x: e.x y:e.y}
Rotate {angle:45}
When the code runs and the Rectangle instance (Figure A) receives a mouse-click event, it
applies both Translate and Rotate transformation operations as shown in Figure B.
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