Working with layer themes

Creating a new sub theme

Object layers come with a default theme usually called Base Theme. Users can create Sub Themes for layer objects.

1. Open the Layer Theme Editor for the appropriate object.
2. Click the Add New button in the Sub Theme Manager Pane toolbar. A blank Sub Theme Editor Pane is displayed.
3. In the Name box, enter a name for the sub theme.
4. In the Field dropdown list, choose a field.
5. In the Range section, select the theme type you require from the dropdown list. Only the theme types valid for your previous selections will be listed. Available types are:
   • Continuous. Displays objects differently based on a series of ranges of a parameter. Suitable for parameters with continually variable values.
   • Individual. Displays objects differently based on individual values (rather than ranged values) of a parameter. Suitable for parameters with a small number of discrete values.
   • Flag. This is a special case of the Individual settings where the discrete value being displayed is the data flag.

   Select one or more options as required:

   • Use AutoRange - With this option checked, IWLive Pro Operator Client automatically re-scales the values if you open a different network.
   • Absolute Values - Removes any sign and simply uses the absolute value of the parameter.
   • Theme Nulls - Allows the user to set up a theme for field values that have not been explicitly assigned #NULL values.
6. In the Visible Range section, specify the range over which the theme is applied. You can select min and max zoom or scale levels from the existing levels, or type in new levels. The visibility control type is set up on the General page of the GeoPlan Properties and Themes dialog.)
7. In the Ranged Themes grid, specify the settings for your sub theme. The Draw Style Preview section provides a visual preview of what the sub theme looks like for the different parameter values.
8. To add or remove theme properties, tick or untick the corresponding check boxes in the Properties box on the left. Selecting a property in the Properties box adds a column for that property in the Ranged Themes grid.
9. Use the options in the Legend Control section to specify whether a sub theme is to be shown in the thematic key and printed legend.
10. To save your sub theme without closing the dialog, click Apply. To save your sub theme and close the dialog, click OK.

Important note on theme precedence

The order of themes in the Sub Theme Manager Pane determines the order in which these are applied to the GeoPlan. Later themes may override earlier themes if they are applied to the same properties, over the same zoom/scale range. Use the Move Up ) or the Move Down buttons of the Sub Theme Manager Pane toolbar to respectively promote or demote a theme.

See the Theme Precedence topic for more information.

Editing an existing sub theme

1. Open the Layer Theme Editor for the appropriate layer object.
2. Select the sub theme to edit in the Sub Theme Manager Pane.
3. Edit the sub theme as appropriate.
4. To commit your changes, click Apply or OK.

Copying a sub theme

It is possible to copy sub themes across other object layers or within a particular object layer.

To copy a sub theme from one object layer to another:

1. Open the Layers and Themes page of the GeoPlan Properties and Themes dialog.
2. Click the Copy button .

   The Copy Sub Themes dialog is displayed.

3. Select the sub themes to copy.
4. Click OK

   The Destination Layer Selection dialog is displayed.

5. Select the appropriate destination layers.
6. Click OK.

   The copied sub themes are added to the themes of the destination object layers.

To copy a sub theme:

1. Open the Layer Theme Editor for the appropriate layer object.
2. Select the sub theme to copy in the Sub Theme Manager Pane.
3. Click the Duplicate button .

   A copy of the sub theme is displayed in the Sub Theme Editor Pane.

4. Change the name from the default if required and make any other appropriate edits, then save the sub theme.

Saving themes

You can save themes from the GeoPlan window and re-use them later on the same network, or any other network in the database. Just like any other database item, you could also copy themes between databases.

You can save themes as a database object, or you can save the current settings for the theme as the default, either for the current network or for all future networks of this type, and you can export theme settings to a GeoPlan Properties file (.iws extension).

Every saving option is available via the Save button of the Layers and Themes page.

1. Right-click the GeoPlan view and select Properties & Themes from the popup menu. The GeoPlan Properties dialog is displayed with the Layers and Themes page open.
2. Click the Save button. The Network Editing Properties - Save Options dialog is displayed.
3. Select the appropriate option.

• Save to database object Selecting this option will save the current themes and GeoPlan properties as a tree object in the Model Window. You can easily apply these saved themes to other networks by dragging them onto the GeoPlan Window.
• Save as default for this network Selecting this option will make the current themes and GeoPlan properties the default for the current network, for this particular user. These settings will then be applied every time you open this particular network. This means you can have a favourite theme or themes applied automatically every time you open this network.
• Save as default for all networks of this type Selecting this option will make the current themes and GeoPlan properties the default for all the networks of the same type, for this particular user. These settings will then be applied every time you open a GeoPlan window from then on. This means you can have a favourite theme or themes applied automatically every time you open a network.
• Export to iws file Selecting this option will allow the current themes and GeoPlan properties to be saved to an external file. The settings will be saved to a GeoPlan Properties file (.iws extension), that you can reload at any time. See the Reloading saved themes section of this topic for more detailed information.
• Remove default from this network

Deleting a sub theme

You can easily remove a theme from the GeoPlan Window.

To delete a theme that has been saved as a database object:

1. In the Model Window, right-click Theme object in the database tree view.
2. Select Delete in the popup menu.
3. Click Yes on the message prompting you for confirmation.

The sub theme has been deleted and does not appear in the database tree view any more.

To delete all themes (except Base Themes) from the corresponding Layer Theme Editor:

1. Open the Layer Theme Editor for the appropriate layer object.
2. Select the sub theme to delete in the Sub Theme Manager Pane.
3. Click the Delete button ( )
4. Click Yes on the message prompting you for confirmation.

The sub theme has been deleted and does not appear in the Sub Theme Manager Pane any more.

Disabling a sub theme

Disabling an existing sub theme will ensure that it is not displayed on the GeoPlan Window.

1. Open the Layer Theme Editor for the appropriate layer object.
2. Select the sub theme to disable in the Sub Theme Manager Pane.
3. Click the Enable / Disable button .
4. Click Apply or OK to commit your changes.

When applied, the sub theme will not be displayed in the GeoPlan Window or the Thematic Key Window. Click the button again to enable and show the sub theme.

Reloading saved themes

It is very easy to reload previously saved themes.

If the theme has been exported to an iws file:

1. Click the Load button of the GeoPlan Properties and Themes - General page.
2. Select *.iws file as the source.
3. Use the Browse button to find the source file. A Windows standard Open dialog is displayed, allowing you to browse for the iws file.
4. Click Load.

When you reload a saved theme, any currently displayed themes are replaced with the loaded set of themes by default:

• Holding down Ctrl when dragging a theme from the tree view into the GeoPlan window will reload the theme as an "add" operation instead of a "replace" operation. New themes will be added, but themes of the same name will not be removed.

To display a log listing the changes to the set of themes displayed in the GeoPlan when loading themes, check the Show list of added and replaced themes option on the Geoplan Properties and Themes - General page.

It is also possible to reload GeoPlan Properties and Themes from the default factory file. Refer to the sections below for more information.

Reverting to GeoPlan Properties and Themes network type user defaults

It is possible to revert to user default settings in terms of GeoPlan Properties and Themes.

1. Open the Geoplan Properties and Themes - General page.
2. Click the Load button. The Load Network Editor Properties dialog is displayed.
   1. Select the Network type default option.
   2. Check the properties to be loaded.
   3. Click Load.
3. Click OK on the message saying that the GeoPlan Properties dialog must be shut to complete the update.

The GeoPlan Properties and Theme user default settings are restored.

Reverting to GeoPlan Properties and Theme factory settings

It is possible to revert to factory settings in terms of GeoPlan Properties and Themes.

1. Open the Geoplan Properties and Themes - General page.
2. Click the Load button. The Load Network Editor Properties dialog is displayed.
   1. Select the Factory default option.
   2. Check the properties to be loaded.
   3. Click Load.
3. Click OK on the message saying that the GeoPlan Properties dialog must be shut to complete the update.

The GeoPlan Properties and Themes factory settings are restored.