Package edu.cnu.mdi.mapping.container

Class MapToolHandler

java.lang.Object

edu.cnu.mdi.container.BaseToolHandler

edu.cnu.mdi.mapping.container.MapToolHandler

All Implemented Interfaces:

IToolHandler

public class MapToolHandler
extends BaseToolHandler

Map-specific tool handler that overrides creation gestures to produce map-native items whose geometry is stored in geographic coordinates rather than projection-space world coordinates.

Military symbol placement is handled entirely by drag-and-drop in MapContainer. This handler is responsible only for the normal map drawing tools such as line, polyline, polygon, and text.

Field Summary

Fields

Modifier and Type	Field	Description
protected final MapContainer	mapContainer	Owning map container.

Fields inherited from class edu.cnu.mdi.container.BaseToolHandler

base, buffer, container, dragPressPoint, modifying, modifyItem, modifyItems, ZOOM_FACTOR

Constructor Summary

Constructors

Constructor	Description
MapToolHandler(BaseContainer container)	Creates a map tool handler bound to the given container.

Method Summary

Modifier and Type	Method	Description
void	createLine(GestureContext gc, Point start, Point end)	Creates a great-circle map line between the two screen-space endpoints.
void	createPolygon(GestureContext gc, Point[] vertices)	Creates a great-circle polygon from the supplied screen-space vertices.
void	createPolyline(GestureContext gc, Point[] vertices)	Creates a great-circle polyline from the supplied screen-space vertices.
void	createTextItem(GestureContext gc, Point location)	Creates a geolocated text item at the clicked map position.
void	panDoneDrag(GestureContext gc)	Completes a projection-aware pan with a definitive repaint.
void	panStartDrag(GestureContext gc)	Saves the current map extent for undo before a projection-aware pan.
void	panUpdateDrag(GestureContext gc)	Recenters the map from the latest incremental pointer displacement.

Methods inherited from class edu.cnu.mdi.container.BaseToolHandler

approveConnectionPoint, beginDragObject, boxZoomRubberbanding, captureImage, createConnection, createEllipse, createRadArc, createRectangle, delete, doNotDrag, dragObjectBy, endDragObject, hitTest, info, magnifyDoneMove, magnifyStartMove, magnifyUpdateMove, pointerClick, pointerDoubleClick, pointerRubberbanding, print, recenter, resetZoom, styleEdit, undoZoom, zoomIn, zoomOut

Methods inherited from class java.lang.Object

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

Field Details

mapContainer

protected final MapContainer mapContainer

Owning map container.

Constructor Details

MapToolHandler

public MapToolHandler(BaseContainer container)

Creates a map tool handler bound to the given container.

Parameters:

container - the owning map container

Method Details

panStartDrag

public void panStartDrag(GestureContext gc)

Saves the current map extent for undo before a projection-aware pan. Unlike ordinary canvas panning, no screenshot is captured or translated.

Specified by:

panStartDrag in interface IToolHandler

Overrides:

panStartDrag in class BaseToolHandler

Parameters:

gc - gesture context (non-null)

panUpdateDrag

public void panUpdateDrag(GestureContext gc)

Recenters the map from the latest incremental pointer displacement. Reprojection keeps the map domain fixed and prevents empty backfill.

Specified by:

panUpdateDrag in interface IToolHandler

Overrides:

panUpdateDrag in class BaseToolHandler

Parameters:

gc - gesture context (non-null)

panDoneDrag

public void panDoneDrag(GestureContext gc)

Completes a projection-aware pan with a definitive repaint.

Specified by:

panDoneDrag in interface IToolHandler

Overrides:

panDoneDrag in class BaseToolHandler

Parameters:

gc - gesture context (non-null)

createLine

public void createLine(GestureContext gc,
 Point start,
 Point end)

Creates a great-circle map line between the two screen-space endpoints.

Specified by:

createLine in interface IToolHandler

Overrides:

createLine in class BaseToolHandler

Parameters:

gc - the gesture context

start - the screen-space start point

end - the screen-space end point

createPolyline

public void createPolyline(GestureContext gc,
 Point[] vertices)

Creates a great-circle polyline from the supplied screen-space vertices.

Specified by:

createPolyline in interface IToolHandler

Overrides:

createPolyline in class BaseToolHandler

Parameters:

gc - the gesture context

vertices - screen-space vertices in draw order

createPolygon

public void createPolygon(GestureContext gc,
 Point[] vertices)

Creates a great-circle polygon from the supplied screen-space vertices.

Specified by:

createPolygon in interface IToolHandler

Overrides:

createPolygon in class BaseToolHandler

Parameters:

gc - the gesture context

vertices - screen-space vertices in draw order

createTextItem

public void createTextItem(GestureContext gc,
 Point location)

Creates a geolocated text item at the clicked map position.

Specified by:

createTextItem in interface IToolHandler

Overrides:

createTextItem in class BaseToolHandler

Parameters:

gc - the gesture context

location - the screen-space click point