com.tensegrity.gui.swt.control.preview
Class AbstractPreview

java.lang.Object
  org.eclipse.swt.widgets.Widget
      org.eclipse.swt.widgets.Control
          org.eclipse.swt.widgets.Scrollable
              org.eclipse.swt.widgets.Composite
                  org.eclipse.swt.widgets.Canvas
                      com.tensegrity.gui.swt.control.preview.AbstractPreview

All Implemented Interfaces:

org.eclipse.swt.graphics.Drawable, Preview

Direct Known Subclasses:

GradientPreview, MarkerFormatPreview, PageSetupPreview, PaintFormatPreview, StrokeFormatPreview

public abstract class AbstractPreview

extends org.eclipse.swt.widgets.Canvas

implements Preview

Abstract base class for a preview canvas. Its main purpose is to define the update procedure of a preview on item changes.

To create a preview canvas simply extend this class and implement the Preview.draw(GC) method in an appropriate way.

Version:

$Id: AbstractPreview.java,v 1.5 2005/03/21 15:04:11 ArndHouben Exp $

Author:

Arnd Houben

Field Summary

protected org.eclipse.swt.graphics.Point	preferredSize Currently fixed size for preview elements.
protected java.lang.Object	previewedItem Reference to the previewed item object

Fields inherited from class org.eclipse.swt.widgets.Control

handle

Constructor Summary

AbstractPreview(org.eclipse.swt.widgets.Composite parent, int style, AbstractPreviewDialog previewDialog)
Constructor which requires the AbstractPreviewDialog to use

Method Summary

org.eclipse.swt.graphics.Point	computeSize(int wHint, int hHint, boolean changed)
protected void	paintControl(org.eclipse.swt.events.PaintEvent pe) Called whenever the preview should draw itself
void	updatePreview(java.lang.Object previewedItem) This is called whenever the preview should update itself, i.e.

Methods inherited from class org.eclipse.swt.widgets.Canvas

getCaret, scroll, setCaret, setFont

Methods inherited from class org.eclipse.swt.widgets.Composite

checkSubclass, getChildren, getLayout, getTabList, layout, layout, setFocus, setLayout, setTabList

Methods inherited from class org.eclipse.swt.widgets.Scrollable

computeTrim, getClientArea, getHorizontalBar, getVerticalBar

Methods inherited from class org.eclipse.swt.widgets.Control

addControlListener, addFocusListener, addHelpListener, addKeyListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addPaintListener, addTraverseListener, computeSize, forceFocus, getAccessible, getBackground, getBorderWidth, getBounds, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getParent, getShell, getSize, getToolTipText, getVisible, internal_dispose_GC, internal_new_GC, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, redraw, redraw, removeControlListener, removeFocusListener, removeHelpListener, removeKeyListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removePaintListener, removeTraverseListener, setBackground, setBounds, setBounds, setCapture, setCursor, setEnabled, setForeground, setLayoutData, setLocation, setLocation, setMenu, setParent, setRedraw, setSize, setSize, setToolTipText, setVisible, toControl, toControl, toDisplay, toDisplay, traverse, update

Methods inherited from class org.eclipse.swt.widgets.Widget

addDisposeListener, addListener, checkWidget, dispose, getData, getData, getDisplay, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, setData, setData, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tensegrity.gui.swt.control.preview.Preview

draw

Field Detail

preferredSize

protected org.eclipse.swt.graphics.Point preferredSize

Currently fixed size for preview elements.

previewedItem

protected java.lang.Object previewedItem

Reference to the previewed item object

Constructor Detail

AbstractPreview

public AbstractPreview(org.eclipse.swt.widgets.Composite parent,
                       int style,
                       AbstractPreviewDialog previewDialog)

Constructor which requires the AbstractPreviewDialog to use

Parameters:

parent - parent composite to add this AbstractPreview to

style - the SWT style bits

previewDialog - instance of an AbstractPreviewDialog to use

Method Detail

updatePreview

public void updatePreview(java.lang.Object previewedItem)

Description copied from interface: Preview

This is called whenever the preview should update itself, i.e. display the given previewedItem.

Specified by:

updatePreview in interface Preview

Parameters:

previewedItem - contains the data to use for an update

computeSize

public org.eclipse.swt.graphics.Point computeSize(int wHint,
                                                  int hHint,
                                                  boolean changed)

paintControl

protected void paintControl(org.eclipse.swt.events.PaintEvent pe)

Called whenever the preview should draw itself

Parameters:

pe - a PaintEvent with additional information