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## com.maryanovsky.map.client.widgets.overview
Class OverviewMapWidget

    java.lang.Object
      com.google.gwt.user.client.ui.UIObject
          com.google.gwt.user.client.ui.Widget
              com.google.gwt.user.client.ui.Composite
                  com.maryanovsky.map.client.MapWidget
                      com.maryanovsky.map.client.widgets.overview.OverviewMapWidget

All Implemented Interfaces:
  HasHandlers, EventListener

    public class OverviewMapWidget

extends MapWidget

A `MapWidget` which displays an overview map for a certain other `MapWidget`. The style name of this widget is `map-OverviewMapWidget`. The rectangle that displays the bounds of the main map consists of 3 elements placed into each other - outer, middle and inner one. Their style names are `map-OverviewMapWidgetRectOuter`, `map-OverviewMapWidgetRectMiddle` and `map-OverviewMapWidgetRectInner` respectively. In order to properly use this widget's default look, you need to import the "widgets/overview/overview.css" file into the page's CSS.

Author:
  Maryanovsky Alexander

Nested Class Summary
`static class` | `OverviewMapWidget.StandardSynchronization` The most commonly used implementation of OverviewMapWidget.Synchronization.
`static interface` | `OverviewMapWidget.Synchronization` The interface to implement when you want to decide on a custom relationship between the location of a main map widget and its overview.

Nested classes/interfaces inherited from class com.maryanovsky.map.client.MapWidget
`MapWidget.MapAnimation`

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
`UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled`

Field Summary

Fields inherited from class com.maryanovsky.map.client.MapWidget
`MAGNIFICATION_PROPERTY_NAME, MAP_PROPERTY_NAME, SIZE_PROPERTY_NAME, TEMPORARY_OFFSET_PROPERTY_NAME`

Fields inherited from class com.google.gwt.user.client.ui.UIObject
`DEBUG_ID_PREFIX`

Constructor Summary
`OverviewMapWidget(MapWidget mainMapWidget, OverviewMapWidget.Synchronization synchronization)` Creates a new `OverviewMapWidget` for the specified main map widget and OverviewMapWidget.Synchronization between them.

Method Summary
`protected Widget` | `createBoundsWidget()` Creates the widget to display the display bounds of the main map widget on the overview widget.
`protected Widget` | `getBoundsWidget()` Returns the widget displaying the bounds of the main map on this overview map; `null` if none.
`MapWidget` | `getMainMapWidget()` Returns the main map widget whose overview this widget displays.
`protected LatLng` | `getPinnedBoundsWidgetLocation()` Returns the location of the bounds widget when it is pinned; `null` otherwise.
`protected boolean` | `isBoundsWidgetDragged()` Returns whether the bounds widget is currently being dragged.
`protected void` | `replaceBoundsWidget()` Replaces the current `boundsWidget`, if any, with a new one, as created by createBoundsWidget().
`protected void` | `setBoundsWidgetDragged(boolean isBoundsWidgetDragged)` Tells the overview map widget whether its bounds widget it being dragged.
`protected void` | `setPinnedBoundsWidgetLocation(LatLng location)` Pins the bounds widget to the specified location, or unpins it if the argument is `null`.
`protected void` | `updateBoundsWidget()` Updates the current `boundsWidget` to accurately reflect the bounds of the main map widget display.

Methods inherited from class com.maryanovsky.map.client.MapWidget
`addOverlay, addOverlays, addPropertyChangeListener, applyMagnification, applyTemporaryOffset, endCurrentAnimation, getBounds, getCenter, getMagnification, getMap, getMapLocationModel, getMapSize, getMouseEventsSource, getOverlayPanel, getOverlays, getPanAnimationLength, getTemporaryOffset, getTileCoverSize, getTouchEventsSource, getUserEventWidget, getWidgetPanel, getZoomAnimationLength, isAnimatedZoomSupported, isGrabCursor, isLoadTilesDuringTemporaryChanges, localToMap, mapToLocal, moveTo, onLoad, onUnload, panBy, panTo, removeOverlay, removeOverlays, removePropertyChangeListener, resized, setGrabCursor, setLoadTilesDuringTemporaryChanges, setMagnification, setMap, setPanAnimationLength, setTemporaryOffset, setTileCoverSize, setZoomAnimationLength, shouldAnimateTo, show, startAnimation, zoomBy, zoomByFixPoint, zoomByTargetLocation, zoomByTargetPoint, zoomTo, zoomToFixPoint, zoomToTargetLocation, zoomToTargetPoint`

Methods inherited from class com.google.gwt.user.client.ui.Composite
`getWidget, initWidget, isAttached, onAttach, onBrowserEvent, onDetach, setWidget`

Methods inherited from class com.google.gwt.user.client.ui.Widget
`addDomHandler, addHandler, delegateEvent, doAttachChildren, doDetachChildren, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, removeFromParent, setLayoutData, sinkEvents`

Methods inherited from class com.google.gwt.user.client.ui.UIObject
`addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, setElement, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, toString, unsinkEvents`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### OverviewMapWidget

    public OverviewMapWidget(MapWidget mainMapWidget,
                             OverviewMapWidget.Synchronization synchronization)

  Creates a new `OverviewMapWidget` for the specified main map widget and OverviewMapWidget.Synchronization between them.

  Parameters:
    `mainMapWidget` - The main map widget with which we are linked.
    `synchronization` - The synchronization between the main and overview map widgets.

Method Detail

### getMainMapWidget

    public final MapWidget getMainMapWidget()

  Returns the main map widget whose overview this widget displays.

### setPinnedBoundsWidgetLocation

    protected final void setPinnedBoundsWidgetLocation(LatLng location)

  Pins the bounds widget to the specified location, or unpins it if the argument is `null`. This allows forcing it to a location other than the one displayed by the main widget, when such a thing is necessary (usually temporarily, during certain animations).

### getPinnedBoundsWidgetLocation

    protected final LatLng getPinnedBoundsWidgetLocation()

  Returns the location of the bounds widget when it is pinned; `null` otherwise. It is up to updateBoundsWidget() to check whether the bounds widget is pinned and set its location appropriately.

### setBoundsWidgetDragged

    protected final void setBoundsWidgetDragged(boolean isBoundsWidgetDragged)

  Tells the overview map widget whether its bounds widget it being dragged. During a drag, its location should not be touched by updateBoundsWidget().

### isBoundsWidgetDragged

    protected boolean isBoundsWidgetDragged()

  Returns whether the bounds widget is currently being dragged. During a drag, its location should not be touched by updateBoundsWidget().

### getBoundsWidget

    protected final Widget getBoundsWidget()

  Returns the widget displaying the bounds of the main map on this overview map; `null` if none.

### replaceBoundsWidget

    protected void replaceBoundsWidget()

  Replaces the current `boundsWidget`, if any, with a new one, as created by createBoundsWidget().

### createBoundsWidget

    protected Widget createBoundsWidget()

  Creates the widget to display the display bounds of the main map widget on the overview widget. Returns `null` for none. This method may be invoked (by replaceBoundsWidget() more than once, such as when the projection of one of the map(s) changes.

### updateBoundsWidget

    protected void updateBoundsWidget()

  Updates the current `boundsWidget` to accurately reflect the bounds of the main map widget display. See also getPinnedBoundsWidgetLocation() and isBoundsWidgetDragged() for special circumstances when the bounds widget may not necessarily reflect the bounds of the main map widget.

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