The class relationship for map layers for graphic objects is shown in Figure 1.12.
Figure 1.12 Layers for Graphic Objects UML Diagram
Most map layers are used to manage graphic objects created from map features imported from various map data files. The styling options differ according to the content of each file and the map features imported by the different readers. For example, you do not style a polygon the same way you do an altitude raster image.
This section describes:
The IlvGeneralPathStyle Class
The IlvGeneralPathStyle class is used for IlvMapGeneralPath stylable graphic objects. Generally, most vectorial map renderers provide a setUsingGeneralPath method to allow a choice between using general paths, which give a better aspect and capabilities, or regular polygons, which provide better performance.
Table 1.3 General Path Styling Properties
Property name |
Content |
|---|
FILL_PAINT |
Paint object used to fill the shape. |
STROKE_PAINT |
Paint object used when stroking the path. |
FILL_ON |
Boolean indicating whether the inside of the object is filled. |
STROKE_ON |
Boolean indicating whether the shape of the object is stroked. |
PAINT_ABSOLUTE |
Boolean indicating whether the fill paint is adapted to the bounding rectangle of the object. |
STROKE_WIDTH |
Stroke width. |
PAINT_ZOOMED |
Boolean indicating whether the paint is zoomed according to the shape when the object is zoomed. |
END_CAP |
Type of decoration applied to the ends of unclosed subpaths (see java.awt.BasicStroke). |
LINE_JOIN |
Type of decoration applied at the intersection of two path segments (see java.awt.BasicStroke). |
LINE_STYLE |
Float table indicating how to make a dash pattern by alternating between opaque and transparent sections (see java.awt.BasicStroke). |
STROKE |
Object used for stroking the path. This attribute is dependant on all stroke attributes and is recomputed when one of them changes.This attribute is not visible in the Map Layer Tree Panel. |
The IlvPolylineStyle Class
The IlvPolylineStyle class is used for IlvMapPolyline stylable objects (non-filled polygons or polylines).
Table 1.4 Polyline Styling Properties
Property name |
Content |
|---|
FOREGROUND |
Color object used when drawing the polygon borders. |
LINE_WIDTH |
Polygon borders line width. |
END_CAP |
Type of decoration applied to the ends of unclosed subpaths (see java.awt.BasicStroke). |
LINE_JOIN |
Type of decoration applied at the intersection of two path segments (see java.awt.BasicStroke). |
LINE_STYLE |
Float table indicating how to make a dash pattern by alternating between opaque and transparent sections (see java.awt.BasicStroke). |
DECORATION |
Additional IlvPathDecoration object used for stroking the polygon. |
DECORATION_ONLY |
Boolean indicating whether only the decoration is displayed. |
DECORATION_PAINT |
Paint color of the decoration. By default (when this attribute is null), the decoration is colored using the FOREGROUND attribute. |
The IlvGraphicPathStyle Class
The IlvGraphicPathStyle class is a subclass of IlvPolylineStyle and so provides all the attributes in The IlvPolylineStyle Class. It provides the style for IlvMapGraphicPath objects (filled polygon areas), by adding the following:
Table 1.5 Graphic Path Styling Properties
Property name |
Content |
|---|
PAINT |
Paint object used to fill the polygon area. |
DO_FILL |
Boolean indicating whether the inside of the polygon is filled. |
DO_STROKE |
Boolean indicating whether the borders of the polygon are stroked. |
The IlvPointStyle Class
The IlvPointStyle class controls the style of map point (IlvMapPoint) objects. It provides the following attributes:
Table 1.6 Point Styling Properties
Property name |
Content |
|---|
FOREGROUND |
Color object used for displaying the point. |
MARKER_SIZE |
The size of the marker. |
MARKER_TYPE |
The type of marker to use. |
The IlvMapTextStyle Class
The IlvMapTextStyle class controls the style of map stylable label objects (IlvMapText). It provides the following attributes:
Table 1.7 Map Text Styling Properties
Property name |
Content |
|---|
ANTIALIASING |
Boolean indicating whether text should be specifically anti-aliased (even if the view setting itself is different). |
ATTACHMENT |
The label attachment. |
FILL_PAINT |
Paint object used to fill the characters of the text. |
FONT |
The label Font. |
FRAME_PAINT |
Paint object used to draw the frame of the label. |
INNER_MARGIN |
Spacing between the frame of the label and the text. |
INTERLINE |
Spacing between two lines of text. |
MAXIMUM_HEIGHT |
The maximum height of the label. |
MINIMUM_HEIGHT |
The minimum height of the label. |
STROKE_PAINT |
Paint object used to draw the shape of the text character. |
BACKGROUND_PAINT |
Paint object used to fill the frame of the label. |
ALIGNMENT |
Alignment of the multi-line text. |
The IlvRasterStyle Class
The IlvRasterStyle class is used with IlvRasterIcon graphic objects, and provides attributes to control the appearance of the image:
Table 1.8 Raster Styling Properties
Property name |
Content |
|---|
BRIGHTNESS |
A Double percentage applied to the color model to make the entire image brighter or darker. 0% gives a black image. |
CONTRAST |
A Double percentage applied to the color model to increase the color difference. 0% gives a completely grey image. |
SATURATION |
A Double percentage applied to the color model of the image to change the color saturation. 0% gives a completely grey image. |
COLOR_MODEL |
The ColorModel object used to transform the pixel values of the image into RGBA colors. |
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