Class ncsa.horizon.viewer.PosTrackerViewer
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Class ncsa.horizon.viewer.PosTrackerViewer
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.PosTrackerViewer
- public class PosTrackerViewer
- extends Viewer
- implements Cloneable
A Viewer that displays the current position under the mouse.
This Viewer contains a display area of a configurable size and below it
a region for displaying the current coordinate position. When the
mouse is placed within the display area, the position beneath the mouse
is displayed at the bottom of the viewer. Moving the mouse updates
the position display in real time.
This class is meant to serve as an example of how to implement a Viewer,
a Viewable, and related coordinate classes.
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coordSys
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data
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defautlDisplayHeight
- default height of display area if not specified in constructor
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defautlDisplayWidth
- default width of display area if not specified in constructor
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display
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newViewable
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pixelMap
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positionDisplay
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slice
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sliceSize
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view
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xCoordPos
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xDataPos
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xLabel
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yCoordPos
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yDataPos
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yLabel
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PosTrackerViewer()
- create a viewer with no Viewable to display
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PosTrackerViewer(int, int)
- create a viewer with a given display size
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addViewable(Viewable)
- replace the current Viewable object with a new one; the display
will not be affected until displaySlice() is called.
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clone()
-
produce a copy of this viewer.
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displaySlice()
- display a default slice of the current Viewable
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displaySlice(Slice)
- display a slice from the current Viewable data, or do nothing if
the current Viewable is not set.
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getDisplaySize()
- return the size of the display area
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getViewable()
- Return a reference to the current Viewable object, or null if
none are attached to this Viewer.
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getViewSlice()
- return a Slice object describing the data currently being viewed,
or null if there is no Viewable currently being viewed.
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mouseMove(Event, int, int)
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preferredSize()
-
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reshape(int, int, int, int)
- resize the viewer so that the display area takes up as much of
the available space as possible.
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setDisplaySize(Dimension)
- set the size of the display area
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setDisplaySize(int, int)
- set the size of the display area
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setPixelMap(Slice, Rectangle)
- set the ImageDisplayMap object, pixelMap (used to convert display
pixels into data pixels), to reflect changes in the current Viewable
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updatePixelMap()
- update the ImageDisplayMap object, pixtrans (used to convert display
pixels into data pixels), to reflect changes in the currently viewed
slice.
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updatePixelMap(Slice, Rectangle)
- update the ImageDisplayMap object, pixtrans (used to convert display
pixels into data pixels), to reflect changes in the currently viewed
slice.
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updatePosDisplay(int, int)
- update the position display for a given display pixel
data
protected Viewable data
slice
protected Slice slice
pixelMap
protected ImageDisplayMap pixelMap
coordSys
protected CoordinateSystem coordSys
view
protected Image view
sliceSize
protected Dimension sliceSize
display
protected ImageCanvas display
xDataPos
protected Label xDataPos
yDataPos
protected Label yDataPos
xLabel
protected Label xLabel
yLabel
protected Label yLabel
xCoordPos
protected Label xCoordPos
yCoordPos
protected Label yCoordPos
positionDisplay
protected Panel positionDisplay
newViewable
protected boolean newViewable
defautlDisplayWidth
public final static int defautlDisplayWidth
- default width of display area if not specified in constructor
defautlDisplayHeight
public final static int defautlDisplayHeight
- default height of display area if not specified in constructor
PosTrackerViewer
public PosTrackerViewer()
- create a viewer with no Viewable to display
PosTrackerViewer
public PosTrackerViewer(int width,
int height)
- create a viewer with a given display size
- Parameters:
- width - width of the display area
addViewable
public synchronized void addViewable(Viewable data)
- replace the current Viewable object with a new one; the display
will not be affected until displaySlice() is called.
- Overrides:
- addViewable in class Viewer
getViewable
public synchronized Viewable getViewable()
- Return a reference to the current Viewable object, or null if
none are attached to this Viewer.
- Overrides:
- getViewable in class Viewer
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
displaySlice
public synchronized void displaySlice(Slice sl)
- display a slice from the current Viewable data, or do nothing if
the current Viewable is not set.
- 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()
- return the size of the display area
- Overrides:
- getDisplaySize in class Viewer
setDisplaySize
public synchronized void setDisplaySize(int width,
int height)
- set the size of the display area
setDisplaySize
public void setDisplaySize(Dimension sz)
- set the size of the display area
reshape
public synchronized void reshape(int x,
int y,
int width,
int height)
- resize the viewer so that the display area takes up as much of
the available space as possible.
- Overrides:
- reshape in class Component
mouseMove
public boolean mouseMove(Event event,
int x,
int y)
- Overrides:
- mouseMove in class Component
preferredSize
public Dimension preferredSize()
- Overrides:
- preferredSize in class Container
setPixelMap
protected synchronized void setPixelMap(Slice dataSlice,
Rectangle displayRegion)
- set the ImageDisplayMap object, pixelMap (used to convert display
pixels into data pixels), to reflect changes in the current Viewable
- Parameters:
- dataSlice - the slice to be displayed; if null, do not
change the slice
- displayRegion - the region of the display being used; if null,
assume that as much of the display as possible
will be used (unless dataSlice is also null,
in which case, nothing is changed).
updatePixelMap
protected synchronized void updatePixelMap(Slice dataSlice,
Rectangle displayRegion)
- update the ImageDisplayMap object, pixtrans (used to convert display
pixels into data pixels), to reflect changes in the currently viewed
slice.
- Parameters:
- dataSlice - the slice to be displayed; if null, do not
change the slice
- displayRegion - the region of the display being used; if null,
assume that as much of the display as possible
will be used (unless dataSlice is also null,
in which case, nothing is changed).
updatePixelMap
protected synchronized void updatePixelMap()
- update the ImageDisplayMap object, pixtrans (used to convert display
pixels into data pixels), to reflect changes in the currently viewed
slice.
updatePosDisplay
protected void updatePosDisplay(int x,
int y)
- update the position display for a given display pixel
clone
public Object clone()
- produce a copy of this viewer.
- Overrides:
- clone in class Viewer
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