public class ZoomInListenerImpl extends Object implements RectangleListener
Listener for doing a zoom in operation of the extent of the ViewPort
of the associated MapControl
object, defining a rectangular area.
If the area defined is smaller than 3 pixels x 3 pixels holds the zoom, otherwise, calculates the new extent r
with this equations:
double factor = 1/MapContext.ZOOMINFACTOR;
Rectangle2D rect = event.getWorldCoordRect();
Rectangle2D.Double r = new Rectangle2D.Double();
ViewPort vp = mapCtrl.getMapContext().getViewPort();
double nuevoX = rect.getMaxX() - ((vp.getExtent().getWidth() * factor) / 2.0);
double nuevoY = rect.getMaxY() - ((vp.getExtent().getHeight() * factor) / 2.0);
Rectangle2D.Double r; // This will be the new extent
r.x = nuevoX;
r.y = nuevoY;
r.width = vp.getExtent().getWidth() * factor;
r.height = vp.getExtent().getHeight() * factor;
vp.setExtent(r);
The ultimately extent will be an adaptation from that, calculated by the ViewPort
bearing in mind the ratio of the available rectangle where display the graphical information.
Constructor and Description |
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ZoomInListenerImpl() |
ZoomInListenerImpl(MapControl mapCtrl)
Creates a new
ZoomInListenerImpl object. |
Modifier and Type | Method and Description |
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boolean |
cancelDrawing()
Determines if the drawing process that this tool executes on the
MapControl
instance could be canceled or not. |
Image |
getImageCursor()
Gets the
Cursor associated to this tool. |
void |
rectangle(EnvelopeEvent event)
Called when user executes a double click with the mouse, finishing the
drawn of the rectangle.
|
public ZoomInListenerImpl()
public ZoomInListenerImpl(MapControl mapCtrl)
Creates a new ZoomInListenerImpl
object.
mapCtrl
- the MapControl
where is defined the rectanglepublic void rectangle(EnvelopeEvent event)
RectangleListener
Called when user executes a double click with the mouse, finishing the drawn of the rectangle.
All features of the active and vector layers of the associated MapControl
object that
their area intersect with the polygonal area defined in the event, will be selected.
rectangle
in interface RectangleListener
event
- mouse event and information about the rectangle definedpublic Image getImageCursor()
ToolListener
Gets the Cursor
associated to this tool.
getImageCursor
in interface ToolListener
public boolean cancelDrawing()
ToolListener
Determines if the drawing process that this tool executes on the MapControl
instance could be canceled or not.
cancelDrawing
in interface ToolListener
true
if is cancellable; otherwise returns false