com.allen_sauer.gwt.dnd.client.util
Class WidgetLocation

java.lang.Object
  com.allen_sauer.gwt.dnd.client.util.AbstractLocation
      com.allen_sauer.gwt.dnd.client.util.WidgetLocation

All Implemented Interfaces:

Location

public class WidgetLocation
extends AbstractLocation

Constructor Summary

WidgetLocation(com.google.gwt.user.client.ui.Widget widget, com.google.gwt.user.client.ui.Widget reference)
Determine location of widget relative to reference, such that referencePanel.add(widget, location.getLeft(), location.getTop()) leaves the widget in the exact same location on the screen.

Method Summary

void	constrain(int minLeft, int minTop, int maxLeft, int maxTop) Constrain the widget location to the provided minimum and maximum values.
int	getLeft() Get x coordinate.
int	getTop() Get the y coordinate.
java.lang.String	toString() Textual representation of this location formatted as (x, y).

Methods inherited from class com.allen_sauer.gwt.dnd.client.util.AbstractLocation

newLocationSnappedToGrid

Methods inherited from class java.lang.Object

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

Constructor Detail

WidgetLocation

public WidgetLocation(com.google.gwt.user.client.ui.Widget widget,
                      com.google.gwt.user.client.ui.Widget reference)

Determine location of widget relative to reference, such that referencePanel.add(widget, location.getLeft(), location.getTop()) leaves the widget in the exact same location on the screen. Note that reference need not be the parent node, or even an ancestor of widget. Therefore coordinates returned may be negative or may exceed the dimensions of reference.

Parameters:

widget - the widget whose coordinates we seek

reference - the widget relative to which we seek our coordinates

Method Detail

constrain

public void constrain(int minLeft,
                      int minTop,
                      int maxLeft,
                      int maxTop)

Constrain the widget location to the provided minimum and maximum values.

Parameters:

minLeft - the minimum left value

minTop - the minimum top value

maxLeft - the maximum left value

maxTop - the maximum top value

getLeft

public int getLeft()

Description copied from interface: Location

Get x coordinate.

Returns:

the left offset in pixels

getTop

public int getTop()

Description copied from interface: Location

Get the y coordinate.

Returns:

the top offset in pixels

toString

public java.lang.String toString()

Description copied from class: AbstractLocation

Textual representation of this location formatted as (x, y).

Overrides:

toString in class AbstractLocation

Returns:

a string representation of this location