diva.sketch.toolbox

Class PanZoomController

java.lang.Object

diva.sketch.SketchController

diva.sketch.toolbox.PanZoomController

public class PanZoomController
extends SketchController

A controller that combines conventional click- and drag-selection on a pane with gesture-based panning and zooming.

The interactors that perform conventional interaction can be accessed through the methods getSelectionDragger(), getDragInteractor(), and getSelectionInteractor().

The gesture pan and zoom is activated by gesturing on the background of the pane. To start zooming, draw a "Z" shape on the background. (The "Z" must be drawn in the usual way, starting at the top left and ending at the bottom right. Without releasing the mouse button, move the mouse up or down to zoom in and out respectively. To start panning, draw a "P" on the canvas, starting at the bottom of the vertical stroke and proceeding in a single stroke upwards and around the loop. Again without releasing the mouse button, move the mouse in any direction to pan in that direction.

Version:

$Revision: 1.6 $

Author:

Michael Shilman (michaels@eecs.berkeley.edu), Heloise Hse (hwawen@eecs.berkeley.edu), John Reekie (johnr@eecs.berkeley.edu)

Field Summary

Fields

Modifier and Type	Field and Description
static String	PZ_TRAINING_DATA The name of the training file that contains "P" and "Z" gestures.

Fields inherited from class diva.sketch.SketchController

DEFAULT_FILL_COLOR, DEFAULT_LINE_WIDTH, DEFAULT_PEN_COLOR

Constructor Summary

Constructors

Constructor and Description
PanZoomController() Create a new controller for the given pane

Method Summary

Modifier and Type	Method and Description
DragInteractor	getDragInteractor() Get the drag interactor
SelectionDragger	getSelectionDragger() Get the selection interactor
SelectionInteractor	getSelectionInteractor() Get the selection interactor
SelectionRenderer	getSelectionRenderer() Get the selection renderer
protected void	initializeInteraction() Initialize all interaction on the sketch pane.
void	pan(double dx, double dy)
void	setSelectionManipulator(Manipulator manipulator) Set the prototype selection manipulator.
void	setSelectionRenderer(SelectionRenderer renderer) Set the selection renderer.
void	strokeCompleted() Re-enable the selection, now that gesturing is completed.
void	zoom(double centerX, double centerY, double zoomAmount, TimedStroke s)

Methods inherited from class diva.sketch.SketchController

containedSketchFigures, figureForSymbol, getBackgroundInterpreter, getDragFilter, getFillColor, getForegroundInterpreter, getLineWidth, getPenColor, getSelectionFilter, getSelectionModel, getSketchModel, getSketchPane, hitSketchFigures, setBackgroundInterpreter, setFillColor, setForegroundInterpreter, setLineWidth, setPenColor, setSelectionModel, setSketchModel, setSketchPane

Methods inherited from class java.lang.Object

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

Field Detail

PZ_TRAINING_DATA

public static final String PZ_TRAINING_DATA

The name of the training file that contains "P" and "Z" gestures.

See Also:

Constant Field Values

Constructor Detail

PanZoomController

public PanZoomController()

Create a new controller for the given pane

Method Detail

initializeInteraction

protected void initializeInteraction()

Description copied from class: SketchController

Initialize all interaction on the sketch pane. This method is called by the setSketchPane() method. The initialization cannot be done in the constructor because the controller does not yet have a reference to its pane at that time.

Overrides:

initializeInteraction in class SketchController

getDragInteractor

public DragInteractor getDragInteractor()

Get the drag interactor

getSelectionDragger

public SelectionDragger getSelectionDragger()

Get the selection interactor

getSelectionRenderer

public SelectionRenderer getSelectionRenderer()

Get the selection renderer

getSelectionInteractor

public SelectionInteractor getSelectionInteractor()

Get the selection interactor

Overrides:

getSelectionInteractor in class SketchController

setSelectionManipulator

public void setSelectionManipulator(Manipulator manipulator)

Set the prototype selection manipulator. Selected figures will have a copy of this manipulator wrapped around them. This method nullifies any previous renderers set with setSelectionRenderer();

setSelectionRenderer

public void setSelectionRenderer(SelectionRenderer renderer)

Set the selection renderer. Selected figures will be highlighted with this renderer.

pan

public void pan(double dx,
                double dy)

zoom

public void zoom(double centerX,
                 double centerY,
                 double zoomAmount,
                 TimedStroke s)

strokeCompleted

public void strokeCompleted()

Re-enable the selection, now that gesturing is completed.