MapNavigationHook

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org.dinopolis.gpstool
Interface MapNavigationHook

All Known Implementing Classes:: GPSMap

public interface MapNavigationHook

This hook is used for hooks concerning navigation in the map.

Version:: $Revision: 1.3 $

Method Summary

Projection getMapProjection()
          Returns the currently used projection of the map.

void reScale(float scale_factor)
          Rescales the map by a given factor.

void setMapCenter(double latitude, double longitude)
          Sets the new center of the map.

void setScale(float scale)
          Rescales the map by to a given scale.

void translateMapCenterRelative(float factor_x, float factor_y)
          Sets a new center for the map.

Method Detail

setMapCenter

public void setMapCenter(double latitude,
                         double longitude)

Sets the new center of the map.

reScale

public void reScale(float scale_factor)

Rescales the map by a given factor. A factor of 1.0 leaves the map unchanged. A factor greater 1.0 zooms in, a factor less than 1.0 zooms out.

setScale

public void setScale(float scale)

Rescales the map by to a given scale.

translateMapCenterRelative

public void translateMapCenterRelative(float factor_x,
                                       float factor_y)

Sets a new center for the map. A negative factor moves the center up or left, a postive factor down or right. A factor of 1.0 translates the center a complete height/width down or right.

getMapProjection

public Projection getMapProjection()

Returns the currently used projection of the map. This projection may be used to calculate the latititude/longitude from screen coordinates and vice versa.