Module org.bigdataviewer.core

Package bdv

Interface TransformEventHandler

All Known Implementing Classes:

TransformEventHandler2D, TransformEventHandler3D

public interface TransformEventHandler

Change a transformation in response to user input (mouse events, key events, etc.) The TransformEventHandler receives notifications about changes of the canvas size (it may react for example by changing the scale of the transformation accordingly).

Author:

Tobias Pietzsch

Method Summary

Modifier and Type	Method	Description
void	install(org.scijava.ui.behaviour.util.Behaviours behaviours)	Install transformation behaviours into the specified behaviours contrainer.
void	setCanvasSize(int width, int height, boolean updateTransform)	This is called, when the screen size of the canvas (the component displaying the image and generating mouse events) changes.

Method Detail

install

void install(org.scijava.ui.behaviour.util.Behaviours behaviours)

Install transformation behaviours into the specified behaviours contrainer.

setCanvasSize

void setCanvasSize(int width,
                   int height,
                   boolean updateTransform)

This is called, when the screen size of the canvas (the component displaying the image and generating mouse events) changes. This can be used to determine screen coordinates to keep fixed while zooming or rotating with the keyboard, e.g., set these to (width/2, height/2). It can also be used to update the current source-to-screen transform, e.g., to change the zoom along with the canvas size.

Parameters:

width - the new canvas width.

height - the new canvas height.

updateTransform - whether the current source-to-screen transform should be updated. This will be false for the initial update of a new TransformEventHandler and true on subsequent calls.