Skip navigation links
com.supermap.mapping

Class ScreenLayer


  • public class ScreenLayer
extends InternalHandle

    The ScreenLayer class.

    The screen layer is bound to the map. Every map window only has a screen layer. It can only open a map once.

    The screen layer is not displayed by default, which is needed to be used in OpenGL mode. The coordinates of the objects in the screen layer are needed to set the screen coordinates.

    • Constructor Summary

      Constructors 
      Constructor and Description
      ScreenLayer() 

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method and Description
      int add(Geometry geometry, java.lang.String tag)
      Adds geometries to the screen layer.
      void clear()
      Clears all the geometric objects of the screen layer.
      Geometry get(int index)
      Returns the Geometry object of the screen layer with the specified index.
      int[] get(java.lang.String tag)
      Gets the index of the geometry with specified tag on the screen layer, which may contain more than one.
      int getCount()
      Gets the count of objects in the screen layer.
      java.lang.String getTag(int index)
      Gets the label of the feature object with the specified index number in the screen layer.
      boolean isVisible()
      Gets whether the screen layer is visible or not.
      boolean remove(int index)
      Removes the geometric object of the screen layer with the specified index.
      boolean remove(java.lang.String tag)
      Deletes the object of specified tag, which may contain more than one object
      boolean set(int index, Geometry geometry)
      Replaces the geometric object with the specified index in the ScreenLayer object with the given geometric object.
      void setVisible(boolean value)
      Sets whether the screen layer is visible or not.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ScreenLayer

        public ScreenLayer()

    • Method Detail

      • getCount

        public int getCount()
        Gets the count of objects in the screen layer.
        Returns:
        The count of objects in the screen layer.

      • isVisible

        public boolean isVisible()
        Gets whether the screen layer is visible or not.
        Returns:
        True or false indicating whether the screen layer is visible or not.

      • setVisible

        public void setVisible(boolean value)
        Sets whether the screen layer is visible or not.
        Parameters:
        value - True or false indicating whether the screen layer is visible or not.

      • add

        public int add(Geometry geometry,
               java.lang.String tag)
        Adds geometries to the screen layer. The supported geometries can be set styles.
        Parameters:
        geometry - The specified geometric object to be added.
        tag - Specified tag of the geometry to be added. The relationship is 1:N, that is, a tag corresponds to multiple objects.
        Returns:
        The index of the Geometry object which has been added to the 3D screen layer.

      • remove

        public boolean remove(int index)
        Removes the geometric object of the screen layer with the specified index.
        Parameters:
        index - The index of the specified geometric object to be removed.
        Returns:
        returns true if successful; otherwise false.

      • remove

        public boolean remove(java.lang.String tag)
        Deletes the object of specified tag, which may contain more than one object
        Parameters:
        tag - The tag of the specified geometric object to be removed.
        Returns:
        returns true if successful; otherwise false.

      • get

        public Geometry get(int index)
        Returns the Geometry object of the screen layer with the specified index.
        Parameters:
        index - The index of the specified geometric object.
        Returns:
        The geometry with specified index in the screen layer. The geometric object returned here is a copy, which does not support the connection point.

      • set

        public boolean set(int index,
                   Geometry geometry)
        Replaces the geometric object with the specified index in the ScreenLayer object with the given geometric object.
        Parameters:
        index - The index of the specified geometric object to be replaced.
        geometry - The specified Geometry object.
        Returns:
        True, if successful; Otherwise false.

      • getTag

        public java.lang.String getTag(int index)
        Gets the label of the feature object with the specified index number in the screen layer.
        Parameters:
        index - The index of the specified geometric object.
        Returns:
        The character string which is the tag of the geometric object with specified index on the screen layer.

      • clear

        public void clear()
        Clears all the geometric objects of the screen layer.

      • get

        public int[] get(java.lang.String tag)
        Gets the index of the geometry with specified tag on the screen layer, which may contain more than one.
        Parameters:
        tag - The tag of the specified geometric object to be removed.
        Returns:
        A integer array, which specifies the index of the object
Skip navigation links