Class CMLayerGraticule extends CM2Layer
CMLayerGraticule
by: Jim Graham
This class required a level of complexity beyond what I initially expected.
The problem is that we have to:
- Draw graticule lines based on the zoom level, projection, and area viewed
- Paint coordinates along the border based on where the graticules intersect with the border
- Paint coordinates along the outside of the graticule grid if it is visible (i.e. does not
intersect with the border.
Settings used are:
- Style: for lines
- TextStyle: for labels in the map
Graticles are made visible by setting the overall style to transparent. The graticules must be drawn to get the intersections for the exterior and border
Settings Group: Graticule
| Setting |
Name |
Type |
Options |
Default |
Comments |
| East |
East |
CMTYPE_FLOAT |
|
180 |
|
| West |
West |
CMTYPE_FLOAT |
|
-180 |
|
| North |
North |
CMTYPE_FLOAT |
|
90 |
|
| South |
South |
CMTYPE_FLOAT |
|
-90 |
|
| Spacing |
Spacing |
CMTYPE_FLOAT |
|
200 |
/ desired spacing for the graticules in pixels |
| DegreeSpacing |
Degree Spacing |
CMTYPE_FLOAT |
|
-1 |
only implemented for 3d |
| TextSpacing |
Text Spacing |
CMTYPE_FLOAT |
|
360 |
only implemented for 3d |
Settings Group: Border
| Setting |
Name |
Type |
Options |
Default |
Comments |
| strokeStyle |
Line Style |
CMTYPE_CSS_STYLE |
|
rgb(0,0,0) |
|
| fillStyle |
Fill Style |
CMTYPE_CSS_STYLE |
|
rgb(255,255,255) |
|
| lineWidth |
Width |
CMTYPE_INTEGER |
|
3 |
|
| BorderWidth |
Border Width |
CMTYPE_FLOAT |
|
12 |
|
Settings Group: BorderText
| Setting |
Name |
Type |
Options |
Default |
Comments |
| font |
Font |
CMTYPE_FONT |
|
14px Arial |
|
| strokeStyle |
Line Style |
CMTYPE_CSS_STYLE |
|
rgb(0,0,0) |
|
| lineWidth |
Width |
CMTYPE_INTEGER |
|
1 |
|
| fillStyle |
Fill Style |
CMTYPE_CSS_STYLE |
|
rgb(0,0,0) |
|