prefuse.controls
Class ZoomControl

java.lang.Object
  prefuse.controls.ControlAdapter
      prefuse.controls.AbstractZoomControl
          prefuse.controls.ZoomControl

All Implemented Interfaces:

java.awt.event.KeyListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.event.MouseWheelListener, java.util.EventListener, Control

public class ZoomControl
extends AbstractZoomControl

Zooms the display, changing the scale of the viewable region. By default, zooming is achieved by pressing the right mouse button on the background of the visualization and dragging the mouse up or down. Moving the mouse up zooms out the display around the spot the mouse was originally pressed. Moving the mouse down similarly zooms in the display, making items larger.

Author:

jeffrey heer

Field Summary

Fields inherited from class prefuse.controls.AbstractZoomControl

DEFAULT_MAX_SCALE, DEFAULT_MIN_SCALE, m_maxScale, m_minScale, m_zoomOverItem, MAX_ZOOM, MIN_ZOOM, NO_ZOOM, ZOOM

Fields inherited from interface prefuse.controls.Control

LEFT_MOUSE_BUTTON, MIDDLE_MOUSE_BUTTON, RIGHT_MOUSE_BUTTON

Constructor Summary

ZoomControl()
Create a new zoom control.

ZoomControl(int mouseButton)
Create a new zoom control.

Method Summary

void	itemDragged(VisualItem item, java.awt.event.MouseEvent e) Invoked when a mouse button is pressed on a VisualItem and then dragged.
void	itemPressed(VisualItem item, java.awt.event.MouseEvent e) Invoked when a mouse button has been pressed on a VisualItem.
void	itemReleased(VisualItem item, java.awt.event.MouseEvent e) Invoked when a mouse button has been released on a VisualItem.
void	mouseDragged(java.awt.event.MouseEvent e) Invoked when a mouse button is pressed on the Display (but NOT a VisualItem) and then dragged.
void	mousePressed(java.awt.event.MouseEvent e) Invoked when a mouse button has been pressed on the Display but NOT on a VisualItem.
void	mouseReleased(java.awt.event.MouseEvent e) Invoked when a mouse button has been released on the Display but NOT on a VisualItem.

Methods inherited from class prefuse.controls.AbstractZoomControl

getMaxScale, getMinScale, isZoomOverItem, setMaxScale, setMinScale, setZoomOverItem, zoom

Methods inherited from class prefuse.controls.ControlAdapter

isEnabled, itemClicked, itemEntered, itemExited, itemKeyPressed, itemKeyReleased, itemKeyTyped, itemMoved, itemWheelMoved, keyPressed, keyReleased, keyTyped, mouseClicked, mouseEntered, mouseExited, mouseMoved, mouseWheelMoved, setEnabled

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZoomControl

public ZoomControl()

Create a new zoom control.

ZoomControl

public ZoomControl(int mouseButton)

Create a new zoom control.

Parameters:

mouseButton - the mouse button that should initiate a zoom. One of Control.LEFT_MOUSE_BUTTON, Control.MIDDLE_MOUSE_BUTTON, or Control.RIGHT_MOUSE_BUTTON.

Method Detail

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button has been pressed on the Display but NOT on a VisualItem.

Specified by:

mousePressed in interface java.awt.event.MouseListener

Specified by:

mousePressed in interface Control

Overrides:

mousePressed in class ControlAdapter

See Also:

MouseListener.mousePressed(java.awt.event.MouseEvent)

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button is pressed on the Display (but NOT a VisualItem) and then dragged.

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

Specified by:

mouseDragged in interface Control

Overrides:

mouseDragged in class ControlAdapter

See Also:

MouseMotionListener.mouseDragged(java.awt.event.MouseEvent)

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button has been released on the Display but NOT on a VisualItem.

Specified by:

mouseReleased in interface java.awt.event.MouseListener

Specified by:

mouseReleased in interface Control

Overrides:

mouseReleased in class ControlAdapter

See Also:

MouseListener.mouseReleased(java.awt.event.MouseEvent)

itemPressed

public void itemPressed(VisualItem item,
                        java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button has been pressed on a VisualItem.

Specified by:

itemPressed in interface Control

Overrides:

itemPressed in class ControlAdapter

See Also:

Control.itemPressed(prefuse.visual.VisualItem, java.awt.event.MouseEvent)

itemDragged

public void itemDragged(VisualItem item,
                        java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button is pressed on a VisualItem and then dragged.

Specified by:

itemDragged in interface Control

Overrides:

itemDragged in class ControlAdapter

See Also:

Control.itemDragged(prefuse.visual.VisualItem, java.awt.event.MouseEvent)

itemReleased

public void itemReleased(VisualItem item,
                         java.awt.event.MouseEvent e)

Description copied from interface: Control

Invoked when a mouse button has been released on a VisualItem.

Specified by:

itemReleased in interface Control

Overrides:

itemReleased in class ControlAdapter

See Also:

Control.itemReleased(prefuse.visual.VisualItem, java.awt.event.MouseEvent)