TGIS_ConfigIni class

DK11 for Delphi | GisConfigIni.TGIS_ConfigIni | Classes | Constructors | Fields | Methods | Properties

Encapsulation of layer configuration file.

Available also on: .NET | Java | ActiveX | Python.

// Delphi
type
  TGIS_ConfigIni = class( TGIS_Config )
  end;

// C++ Builder
class PASCALIMPLEMENTATION TGIS_ConfigIni : public TGIS_Config
{
};

→ TGIS_BaseObjectDisposable → TGIS_ConfigAbstract → TGIS_Config

Procedures to read project and layer configuration files.

1) Layer configuration file

Each layer can have its own configuration file located in the same directory as the layer data itself. This file must have the name “layerfile_with_extension.ini”. Below you can see a sample file with comments:

[TatukGIS Layer]
; this is a general section use common values here
Visible=False
LineColor=BLACK
LineWidth=-2

[TatukGIS Layer 1]
; this is a section valid only for selected zooms
MinZoom=0.123 ; this describes when this section will be valid
MaxZoom=2.13

;override standard values
Visible=True
LineColor=YELLOW
  
[TatukGIS Layer 2]
MinZoom=2.13
MaxZoom=999
Visible=True
LineColor=YELLOW
LineWidth=-5

1A) Renderer

By attaching a 'render' entry followed by a query, you can on/off section:

[TatukGIS Layer 2]
MinZoom=2.13
MaxZoom=999
Render=population > 100
Visible=True
LineColor=YELLOW
LineWidth=-5

First section which meets all criteria will be used. If Render was used, then MinZoom, MaxZoom can be omitted.

1B) Styles.

By attaching style name to a section name we have an option to define special styles (for flushing etc).

[TatukGIS Layer]
Style=Flush
LineColor=YELLOW
LineWidth=-15

2) Project configuration file.

Is very similar to layer configuration file. Values written to this file will overwrite values from layer configuration file.

[TatukGIS Layer1]
;first layer
Path=c:\test\street.shp
Name=Street

; can be set here or will be read from layer conf. file
LineColor=YELLOW

[TatukGIS Layer2]
;second layer
Path=c:\test\photo.tif
Name=Satelite photo

[TatukGIS Layer2 1]
; and now first zoom dependent value for second layer
MinZoom=1.23
MaxZoom=1.99
Visible=False

• project2sqlite sample