Eclipse GEF and Draw2d Plug-in Developer Guide (Galileo) - GridLayer (Eclipse GEF API Specification)

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Eclipse GEF
3.3

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org.eclipse.gef.editparts
Class GridLayer

java.lang.Object
  

org.eclipse.draw2d.Figure
      

org.eclipse.draw2d.Layer
          

org.eclipse.draw2d.FreeformLayer
              
org.eclipse.gef.editparts.GridLayer

All Implemented Interfaces:: FreeformFigure, IFigure

public class GridLayer
extends FreeformLayer

This is a layer that displays the grid. The default grid color is light gray. To change the grid color, set the foreground color for this layer.

Since:: 3.0

Nested Class Summary

Nested classes inherited from class org.eclipse.draw2d. Figure

Figure.FigureIterator, Figure.IdentitySearch

Nested classes inherited from class org.eclipse.draw2d. IFigure

IFigure.NoInsets

Field Summary

protected int gridX
          Field indicating the horizontal grid spacing

protected int gridY
          Field for the vertical grid spacing

protected Point origin
          Field indicating what the grid origin is.

Fields inherited from class org.eclipse.draw2d. Figure

bgColor, border, bounds, fgColor, flags, font, MAX_FLAG, maxSize, minSize, NO_MANAGER, prefSize, toolTip

Fields inherited from interface org.eclipse.draw2d. IFigure

MAX_DIMENSION, MIN_DIMENSION, NO_INSETS

Constructor Summary

GridLayer ()
          Constructor Sets the default grid color: ColorConstants.lightGray

Method Summary

Dimension getPreferredSize (int wHint, int hHint)
          Overridden to indicate no preferred size.

protected void paintFigure ( Graphics graphics)


protected void paintGrid ( Graphics g)
          Paints the grid.

void setOrigin ( Point p)
          Sets the origin of the grid.

void setSpacing ( Dimension spacing)
          Sets the horizontal and vertical spacing of the grid.

Methods inherited from class org.eclipse.draw2d. FreeformLayer

add, addFreeformListener, fireExtentChanged, fireMoved, getFreeformExtent, primTranslate, remove, removeFreeformListener, setFreeformBounds

Methods inherited from class org.eclipse.draw2d. Layer

containsPoint, findFigureAt

Methods inherited from class org.eclipse.draw2d. Figure

add, add, add, addAncestorListener, addCoordinateListener, addFigureListener, addFocusListener, addKeyListener, addLayoutListener, addListener, addMouseListener, addMouseMotionListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, containsPoint, erase, findDescendantAtExcluding, findFigureAt, findFigureAt, findFigureAtExcluding, findMouseEventTargetAt, findMouseEventTargetInDescendantsAt, fireCoordinateSystemChanged, fireFigureMoved, firePropertyChange, firePropertyChange, firePropertyChange, getBackgroundColor, getBorder, getBounds, getChildren, getClientArea, getClientArea, getCursor, getFlag, getFont, getForegroundColor, getInsets, getLayoutManager, getListeners, getLocalBackgroundColor, getLocalFont, getLocalForegroundColor, getLocation, getMaximumSize, getMinimumSize, getMinimumSize, getParent, getPreferredSize, getSize, getToolTip, getUpdateManager, handleFocusGained, handleFocusLost, handleKeyPressed, handleKeyReleased, handleMouseDoubleClicked, handleMouseDragged, handleMouseEntered, handleMouseExited, handleMouseHover, handleMouseMoved, handleMousePressed, handleMouseReleased, hasFocus, internalGetEventDispatcher, intersects, invalidate, invalidateTree, isCoordinateSystem, isEnabled, isFocusTraversable, isMirrored, isMouseEventTarget, isOpaque, isRequestFocusEnabled, isShowing, isValid, isValidationRoot, isVisible, layout, paint, paintBorder, paintChildren, paintClientArea, removeAll, removeAncestorListener, removeCoordinateListener, removeFigureListener, removeFocusListener, removeKeyListener, removeLayoutListener, removeListener, removeMouseListener, removeMouseMotionListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, revalidate, setBackgroundColor, setBorder, setBounds, setChildrenDirection, setChildrenEnabled, setChildrenOrientation, setConstraint, setCursor, setEnabled, setFlag, setFocusTraversable, setFont, setForegroundColor, setLayoutManager, setLocation, setMaximumSize, setMinimumSize, setOpaque, setParent, setPreferredSize, setPreferredSize, setRequestFocusEnabled, setSize, setSize, setToolTip, setValid, setVisible, translate, translateFromParent, translateToAbsolute, translateToParent, translateToRelative, useLocalCoordinates, validate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.draw2d. IFigure

add, add, add, addAncestorListener, addCoordinateListener, addFigureListener, addFocusListener, addKeyListener, addLayoutListener, addMouseListener, addMouseMotionListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, containsPoint, containsPoint, erase, findFigureAt, findFigureAt, findFigureAt, findFigureAtExcluding, findMouseEventTargetAt, getBackgroundColor, getBorder, getBounds, getChildren, getClientArea, getClientArea, getCursor, getFont, getForegroundColor, getInsets, getLayoutManager, getLocalBackgroundColor, getLocalForegroundColor, getMaximumSize, getMinimumSize, getMinimumSize, getParent, getPreferredSize, getSize, getToolTip, getUpdateManager, handleFocusGained, handleFocusLost, handleKeyPressed, handleKeyReleased, handleMouseDoubleClicked, handleMouseDragged, handleMouseEntered, handleMouseExited, handleMouseHover, handleMouseMoved, handleMousePressed, handleMouseReleased, hasFocus, internalGetEventDispatcher, intersects, invalidate, invalidateTree, isCoordinateSystem, isEnabled, isFocusTraversable, isMirrored, isOpaque, isRequestFocusEnabled, isShowing, isVisible, paint, removeAncestorListener, removeCoordinateListener, removeFigureListener, removeFocusListener, removeKeyListener, removeLayoutListener, removeMouseListener, removeMouseMotionListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, revalidate, setBackgroundColor, setBorder, setBounds, setConstraint, setCursor, setEnabled, setFocusTraversable, setFont, setForegroundColor, setLayoutManager, setLocation, setMaximumSize, setMinimumSize, setOpaque, setParent, setPreferredSize, setRequestFocusEnabled, setSize, setSize, setToolTip, setVisible, translate, translateFromParent, translateToAbsolute, translateToParent, translateToRelative, validate

Field Detail

gridX

protected int gridX

Field indicating the horizontal grid spacing

gridY

protected int gridY

Field for the vertical grid spacing

origin

protected 
Point origin

Field indicating what the grid origin is. This is used simply to determine the offset from 0,0.

Constructor Detail

GridLayer

public GridLayer()

Constructor Sets the default grid color: ColorConstants.lightGray

Method Detail

getPreferredSize

public 
Dimension getPreferredSize(int wHint,
                                  int hHint)

Overridden to indicate no preferred size. The grid layer should not affect the size of the layered pane in which it is placed.

See Also:: Figure.getPreferredSize(int, int)

paintFigure

protected void paintFigure(
Graphics graphics)

See Also:: Figure.paintFigure(org.eclipse.draw2d.Graphics)

paintGrid

protected void paintGrid(
Graphics g)

Paints the grid. Sub-classes can override to customize the grid's look. If this layer is being used with SnapToGrid, this method will only be invoked when the visibility property is set to true.

Parameters:: g - The Graphics object to be used to do the painting
See Also:: FigureUtilities.paintGrid(Graphics, IFigure, Point, int, int)

setOrigin

public void setOrigin(
Point p)

Sets the origin of the grid. The origin is used only to determine the offset from 0,0.

Parameters:: p - the origin

setSpacing

public void setSpacing(
Dimension spacing)

Sets the horizontal and vertical spacing of the grid. A grid spacing of 0 will be replaced with the default spacing. A negative spacing will cause no grid lines to be drawn for that dimension.

Parameters:: spacing - A Dimension representing the horizontal (width) and vertical (height) gaps