Class ncsa.horizon.viewer.BasicSelectionViewer
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Class ncsa.horizon.viewer.BasicSelectionViewer
java.lang.Object
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+----java.awt.Component
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+----java.awt.Container
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+----java.awt.Panel
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+----ncsa.horizon.viewer.Viewer
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+----ncsa.horizon.viewer.SelectionViewer
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+----ncsa.horizon.viewer.BasicSelectionViewer
- public class BasicSelectionViewer
- extends SelectionViewer
- implements Cloneable
This Viewer provides a basic implementation of the methods needed for
a SelectionViewer.
Programmer's are encouraged to inspect this code for examples of how
to implement the various Viewer methods.
-
coord
- CoordinateSystem object for converting between data pixels and
world coordinates
-
drawBox
- a flag that is true if the last selected box should be drawn
-
drawLine
- a flag that is true if the last selected line should be drawn
-
drawPixel
- a flag that is true if the last selected pixel should be drawn
-
image
- the last image extracted from the current viewable
-
mode
- the current display mode (FIT, CENTER, TRUNCATE, or SCALE)
-
newViewable
- a flag that is true if a new viewable has been attached
-
pixtrx
- ImageDataOrigin object for converting between display pixels and
data pixels
-
pref_size
- the preferred size of this Panel
-
selbox
- the last selected display rectangle
-
selline
- the last selected display line
-
selpix
- the last selected display pixel
-
SIZE_IMAGE_CENTER
- Trim the image to the Viewer size (centered)
-
SIZE_IMAGE_FIT
- Fit the image to the Viewer size (default)
-
SIZE_IMAGE_SCALE
- Scale the image to the Viewer size (centered)
-
SIZE_IMAGE_TRUNCATE
- Trim the image to the Viewer size (centered)
-
slice
- the last slice requested from the current viewable
-
viewable
- the current viewable
-
BasicSelectionViewer()
- create a BasicSelectionViewer of default preferred size;
-
BasicSelectionViewer(Dimension)
- create a BasicSelectionViewer of specified preferred size;
-
BasicSelectionViewer(int, int)
- create a BasicSelectionViewer of specified preferred size;
-
addViewable(Viewable)
- This method adds a reference to a viewable object.
-
clone()
- Create a clone of this Viewer Panel.
-
displaySlice()
- Display a default slice of the current Viewable.
-
displaySlice(Slice)
- Display a slice from the current Viewable data, or do nothing if
the current Viewable is not set.
-
getBoxSelection()
- get the current selected display box.
-
getDisplaySize()
- This method returns the size of the region that displays a Viewable
-
getLineSelection()
- get the current selected display Line.
-
getPixelSelection()
- get the current selected display pixel.
-
getSliceSelection()
- return the current selected Slice, or null if there is no current
Viewable;
-
getViewable()
- Return a reference to the current Viewable object, or null if
none are attached to this Viewer.
-
getViewSlice()
- return a Slice object describing the data currently being viewed,
or null if there is no Viewable currently being viewed.
-
getVoxelSelection()
- return the current selected Voxel, or null if there is no current
Viewable.
-
imageUpdate(Image, int, int, int, int, int)
- This implementation simple issues a repaint() when an image has become
available.
-
mouseDown(Event, int, int)
- process selection request
-
mouseDrag(Event, int, int)
- process a box selection request
-
paint(Graphics)
- This implementationm simply calls the update() method.
-
preferredSize()
- return the preferred size of this Viewer Panel
-
setBoxSelection(int, int, int, int)
- set the current selected display box.
-
setLineSelection(int, int, int, int)
- set the current selected display line.
-
setMode(int)
- Set the display mode for sizing or trimming the viewable image.
-
setPixelSelection(int, int)
- set the current selected display pixel.
-
setSliceSelection(Volume)
- set the current selected Slice to the given Volume as projected onto
the currently displayed Slice, or do nothing if there is no current
Viewable.
-
setVoxelSelection(Voxel)
-
set the current selected Voxel to the one given as projected onto
the currently displayed Slice, or do nothing if there is no current
Viewable.
-
update(Graphics)
- Redraw current slice/viewable.
SIZE_IMAGE_FIT
public final static int SIZE_IMAGE_FIT
- Fit the image to the Viewer size (default)
SIZE_IMAGE_CENTER
public final static int SIZE_IMAGE_CENTER
- Trim the image to the Viewer size (centered)
SIZE_IMAGE_TRUNCATE
public final static int SIZE_IMAGE_TRUNCATE
- Trim the image to the Viewer size (centered)
SIZE_IMAGE_SCALE
public final static int SIZE_IMAGE_SCALE
- Scale the image to the Viewer size (centered)
drawPixel
public boolean drawPixel
- a flag that is true if the last selected pixel should be drawn
drawBox
public boolean drawBox
- a flag that is true if the last selected box should be drawn
drawLine
public boolean drawLine
- a flag that is true if the last selected line should be drawn
viewable
protected Viewable viewable
- the current viewable
mode
protected int mode
- the current display mode (FIT, CENTER, TRUNCATE, or SCALE)
image
protected Image image
- the last image extracted from the current viewable
slice
protected Slice slice
- the last slice requested from the current viewable
pref_size
protected Dimension pref_size
- the preferred size of this Panel
pixtrx
protected ImageDataOrigin pixtrx
- ImageDataOrigin object for converting between display pixels and
data pixels
coord
protected CoordinateSystem coord
- CoordinateSystem object for converting between data pixels and
world coordinates
selpix
protected Point selpix
- the last selected display pixel
selbox
protected Rectangle selbox
- the last selected display rectangle
selline
protected Rectangle selline
- the last selected display line
newViewable
protected boolean newViewable
- a flag that is true if a new viewable has been attached
BasicSelectionViewer
public BasicSelectionViewer()
- create a BasicSelectionViewer of default preferred size;
BasicSelectionViewer
public BasicSelectionViewer(Dimension size)
- create a BasicSelectionViewer of specified preferred size;
BasicSelectionViewer
public BasicSelectionViewer(int width,
int height)
- create a BasicSelectionViewer of specified preferred size;
addViewable
public void addViewable(Viewable dataset)
- This method adds a reference to a viewable object.
- Parameters:
- image - the Viewable object to be added
- Overrides:
- addViewable in class Viewer
getViewable
public Viewable getViewable()
- Return a reference to the current Viewable object, or null if
none are attached to this Viewer.
- Returns:
- The current Viewable object; null if none present.
- Overrides:
- getViewable in class Viewer
displaySlice
public void displaySlice(Slice sl)
- Display a slice from the current Viewable data, or do nothing if
the current Viewable is not set. A null slice means display the
default slice.
- Overrides:
- displaySlice in class Viewer
displaySlice
public void displaySlice()
- Display a default slice of the current Viewable.
- Overrides:
- displaySlice in class Viewer
getDisplaySize
public Dimension getDisplaySize()
- This method returns the size of the region that displays a Viewable
- Returns:
- Dimension of the compoonent
- Overrides:
- getDisplaySize in class Viewer
- See Also:
- Dimension, size()
clone
public Object clone() throws CloneNotSupportedException
- Create a clone of this Viewer Panel.
- Returns:
- A clone of this object.
- Throws: CloneNotSupportedException
- not thrown if
called as a BasicSelectionViewer
- Overrides:
- clone in class Viewer
imageUpdate
public boolean imageUpdate(Image img,
int flags,
int x,
int y,
int w,
int h)
- This implementation simple issues a repaint() when an image has become
available.
- Overrides:
- imageUpdate in class Component
getViewSlice
public Slice getViewSlice()
- return a Slice object describing the data currently being viewed,
or null if there is no Viewable currently being viewed.
- Overrides:
- getViewSlice in class Viewer
setPixelSelection
public void setPixelSelection(int x,
int y)
- set the current selected display pixel. The location is measured in
real display (i.e. screen) pixels relative to the upper left hand
corner.
- Overrides:
- setPixelSelection in class SelectionViewer
setBoxSelection
public void setBoxSelection(int x1,
int y1,
int x2,
int y2)
- set the current selected display box. The locations are measured in
real display (i.e. screen) pixels relative to the upper left hand
corner.
- Parameters:
- x1,y1 - the location of one vertex of the selected box
- x2,y2 - the location of the vertex of the selected box opposite
to the one given by x1,y1
- Overrides:
- setBoxSelection in class SelectionViewer
setLineSelection
public void setLineSelection(int x1,
int y1,
int x2,
int y2)
- set the current selected display line. The locations are measured in
real display (i.e. screen) pixels relative to the upper left hand
corner.
- Parameters:
- x1,y1 - the location of the start of the line
- x2,y2 - the location of the end of the line
- Overrides:
- setLineSelection in class SelectionViewer
getPixelSelection
public Point getPixelSelection()
- get the current selected display pixel.
- Overrides:
- getPixelSelection in class SelectionViewer
getBoxSelection
public Rectangle getBoxSelection()
- get the current selected display box.
- Overrides:
- getBoxSelection in class SelectionViewer
getLineSelection
public Rectangle getLineSelection()
- get the current selected display Line.
- Overrides:
- getLineSelection in class SelectionViewer
getVoxelSelection
public Voxel getVoxelSelection()
- return the current selected Voxel, or null if there is no current
Viewable.
- Overrides:
- getVoxelSelection in class SelectionViewer
setVoxelSelection
public synchronized void setVoxelSelection(Voxel vox)
- set the current selected Voxel to the one given as projected onto
the currently displayed Slice, or do nothing if there is no current
Viewable.
- Overrides:
- setVoxelSelection in class SelectionViewer
getSliceSelection
public Slice getSliceSelection()
- return the current selected Slice, or null if there is no current
Viewable;
- Overrides:
- getSliceSelection in class SelectionViewer
setSliceSelection
public synchronized void setSliceSelection(Volume vol)
- set the current selected Slice to the given Volume as projected onto
the currently displayed Slice, or do nothing if there is no current
Viewable.
- Overrides:
- setSliceSelection in class SelectionViewer
setMode
public void setMode(int _mode)
- Set the display mode for sizing or trimming the viewable image.
- Parameters:
- _mode - The mode to use. Valid modes are SIZE_IMAGE_FIT,
SIZE_IMAGE_CENTER, and SIZE_IMAGE_TRUNCATE.
preferredSize
public Dimension preferredSize()
- return the preferred size of this Viewer Panel
- Overrides:
- preferredSize in class Container
update
public void update(Graphics g)
- Redraw current slice/viewable.
- Overrides:
- update in class Component
paint
public void paint(Graphics g)
- This implementationm simply calls the update() method.
- Parameters:
- g - The graphics context to paint.
- Overrides:
- paint in class Component
mouseDown
public boolean mouseDown(Event evt,
int x,
int y)
- process selection request
- Overrides:
- mouseDown in class Component
mouseDrag
public boolean mouseDrag(Event evt,
int x,
int y)
- process a box selection request
- Overrides:
- mouseDrag in class Component
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