The configuration files provide a way to customize the Front Panel. Certain modifications can only be done by editing a configuration file, including:

Adding a new control position to the Main Panel.
Adding special types of controls, such as client windows.
Changing certain default behaviors--for example, whether the Front Panel controls respond to a single- or double-click.

To provide maximum flexibility in configuring the panel, these files can be personal, system-wide, or located on other systems.

The Front Panel is created and managed by the Workspace Manager.

Default Front Panel Configuration File

The default Front Panel is defined in the Front Panel configuration file /usr/dt/appconfig/types/language/dtwm.fp.

This file should not be altered.

Search Path for Front Panel Configuration Files

The Front Panel definition can be distributed among any number of files located locally or on remote systems.

Files used to define the Front Panel must meet these requirements:

The file name must end in .fp; for example, mail.fp.
The file must be located along the actions database search path.

The default actions database search path includes these directories, searched in the following order:

HomeDirectory/.dt/types: Personal customizations
/etc/dt/appconfig/types/language: System-wide customizations
/usr/dt/appconfig/types/language: Built-in panel and controls

An additional directory, HomeDirectory/.dt/types/fp_dynamic, is used for personal customizations made with the user interface. Do not use this directory for manual customizations.

The actions database search path may include additional directories added to configure the system for networking. In particular, additional remote locations are added when the system is configured to access an application server. For more information, see "Database (Action/Data Types) Search Path".

How the Front Panel Is Assembled: Precedence Rules

The Front Panel is assembled from all the configuration files located on the actions database search path.

Where there is a conflict between components of the definition, precedence rules determine which definition is used. Two components are in conflict with one another when they:

Have the same control name, CONTAINER_NAME, and CONTAINER_TYPE.
Or, they compete for the same position (by having different names but the same CONTAINER_NAME, CONTAINER_TYPE, and POSITION_HINTS).

The Front Panel uses these precedence rules:

If components have the same control name and container name and type, the component read first is used.
For example, if both a system-wide and built-in control contain these fields but are otherwise different:
```
CONTROL TextEditor
{
   CONTAINER_TYPE    BOX
   CONTAINER_NAME    Top
   ... 
}
```
then the system-wide control has precedence.
If two components complete for the same position, they are placed in the order in which they are read.
For example, if a user creates a new personal control for the Main Panel (CONTAINER_TYPE BOX and CONTAINER_NAME Top) and assigns it POSITION_HINTS 5, the personal control will bump the built-in control and all other controls with higher position numbers one position to the right.

Note: When you are modifying a control by creating a new system-wide or personal version of it, the new control definition must specify the same control name, CONTAINER_NAME, and CONTAINER_TYPE. Otherwise, the new control will appear in addition to the existing control.

Dynamically Created Front Panel Files

When the user customizes the Front Panel using the Install Icon control and pop-up menus, files are written to the directory HomeDirectory/.dt/types/fp_dynamic.

The Front Panel creates an additional file, HomeDirectory/.dt/sessions/dtwmfp.session, that is used to save and restore the state of the customized Front Panel for each session.

Administering User Interface Customizations

Users can use the controls' pop-up menus and Install Icon controls to extensively customize the Front Panel.

This section describes how to:

Prevent certain personal customizations. For example, you may want to make it impossible for a user to delete a control.
Undo personal customizations. For example, a user might request that you restore a single control accidentally deleted.

To Prevent Personal Customizations

If the control is a built-in control, copy its definition from /usr/dt/appconfig/types/language/dtwm.fp to /etc/dt/appconfig/types/language/name.fp.
Add the following line to the control definition:
```
LOCKED   True
```

To Restore a Deleted Control or Subpanel

The Restore Front Panel action in the Desktop_Tools application group removes all Front Panel customizations made with the user interface. Users can use this action to remove all their personal customizations made with the Front Panel's pop-up menus.

Use the following procedure to restore an individual control.

In the HomeDirectory/.dt/types/fp_dynamic directory, remove the file that was created when the user deleted the control. The control will have the same name as the original control that was deleted.

For example, if the user deleted the Icon Editor control, a file in the fp_dynamic directory will contain:

CONTROL IconEditor
{
   ... 
   DELETE   True
}

When the user deletes a subpanel, a separate dynamic file is created for the subpanel and for each control in the subpanel.

Organization of the Front Panel Definition

The Front Panel is built by assembling definitions for its components. Each of these components has required syntax that defines where the component is placed in the Front Panel, what the component looks like, and how it behaves.

Front Panel Components

Figure 13-1 Front Panel components

The Front Panel is assembled from the outside in:

The PANEL is the top-level container, or parent, for the entire Front Panel.
The PANEL is a container for one or more BOXes.
A BOX is a container for one or more CONTROLs.

There are two special types of containers:

A SUBPANEL is associated with a particular control (the control is the container for the subpanel). Subpanels "slide up" from the control with which they are associated.
The SWITCH contains the buttons for changing workspaces plus additional controls.

General Syntax of the Front Panel Definition

Each component in the Front Panel is defined separately using the syntax:

COMPONENT name
{
  KEYWORD       value
  KEYWORD       value
  ... 
}

Some keywords are required, others are optional. For more information, see the dtfpfile(4X) man page.

PANEL Definition

The PANEL is the top-level component. Its definition includes:

The Front Panel name
Fields describing the general appearance and behavior of the entire Front Panel


PANEL front_panel_name
{
   KEYWORD      value
   KEYWORD      value
   ... 
}

The front_panel_name is a unique name for the Front Panel. The default name is "FrontPanel."

BOX Definitions

A BOX definition describes:

The BOX name
Which PANEL the box is in (CONTAINER_NAME)
The position of the box in the PANEL (POSITION_HINTS)
Fields describing appearance and behavior that apply to the entire box

BOX box_name { CONTAINER_NAME front_panel_name POSITION_HINTS position KEYWORD value KEYWORD value ... }

CONTROL Definitions

A CONTROL definition describes:

The CONTROL name
Whether the control is in a box, subpanel, or switch (CONTAINER_TYPE)
Which box, subpanel, or switch the control is in (CONTAINER_NAME)
The position of the CONTROL in the BOX (POSITION_HINTS).
Fields describing appearance and behavior of the control

CONTROL control_name { CONTAINER_TYPE BOX or SUBPANEL or SWITCH CONTAINER_NAME box_name or subpanel_name or switch_name TYPE control_type POSITION_HINTS position KEYWORD value KEYWORD value ... }

SUBPANEL Definitions

A SUBPANEL definition describes:

The SUBPANEL name
The name of the control to which the subpanel is attached (CONTAINER_NAME)
Fields describing appearance and behavior specific to the subpanel

SUBPANEL subpanel_name { CONTAINER_NAME control_name KEYWORD value KEYWORD value ... }

SWITCH Definition

The SWITCH definition describes:

The SWITCH name
Which BOX the SWITCH is in (CONTAINER_NAME)
The position of the SWITCH within the BOX (POSITION_HINTS)
Fields describing the appearance and behavior of the SWITCH

SWITCH switch_name { CONTAINER_NAME box_name POSITION_HINTS position KEYWORD value KEYWORD value ... }

Modifying the Main Panel

The Main Panel is the Front Panel window, excluding the subpanels.

Figure 13-2 Main Panel containers

Modifications you can make include:

Adding or removing controls
Interchanging the positions of controls

To Add a Control to the Main Panel

Create a Front Panel configuration file:
- System-wide: /etc/dt/appconfig/types/language/*.fp
- Personal: HomeDirectory/.dt/types/*.fp
Define the control in the file.
Use the CONTAINER_NAME and CONTAINER_TYPE fields to specify the container for the control:
```
CONTAINER_NAME  Top
CONTAINER_TYPE  BOX
```
Use POSITION_HINTS to specify the left-to-right placement of the control. Since customizations have precedence over built-in controls, the new control will "bump" the existing control with that position one position to the right.
Save the configuration file.
Create an icon for the Front Panel control.
See "Specifying the Icon Used by a Control".
Choose Restart Workspace Manager from the Workspace menu.

For example, the following control definition placed in the file /etc/dt/appconfig/types/language/audio.fp inserts an audio application control between the Clock and Calendar controls.

CONTROL AudioApplication { TYPE icon CONTAINER_NAME Top CONTAINER_TYPE BOX ICON AudioApp POSITION_HINTS 2 PUSH_ACTION StartAudioApplication PUSH_RECALL true }

To Remove a Control

Create a Front Panel configuration file:
- System-wide: /etc/dt/appconfig/types/language/name.fp
- Personal: HomeDirectory/.dt/types/name.fp
Copy the definition of the control you want to delete to the new file.
If the control is built-in, its definition is in /usr/dt/appconfig/types/language/dtwm.fp.
You do not need to copy the entire definition. However, the portion you copy must include the fields CONTAINER_NAME and CONTAINER_TYPE.
Add the DELETE field to the definition:
```
DELETE    True
```
Save the configuration file
Choose Restart Workspace Manager from the Workspace menu.

For example, the following control definition placed in the file /etc/dt/appconfig/types/language/TrashCan.fp removes the Trash Can control from the Front Panel.

CONTROL Trash { CONTAINER_NAME Top CONTAINER_TYPE BOX DELETE True }

To Modify a Control

Use this procedure when you need to modify a control definition--for example, to change its icon image.

Copy the entire control definition from /usr/dt/appconfig/types/language/dtwm.fp to:
- System-wide: /etc/dt/appconfig/types/language/name.fp
- Personal: HomeDirectory/.dt/types/name.fp.
Edit the field you want to change. You can also add additional fields.
Save the file
Choose Restart Workspace Manager from the Workspace menu.

To Interchange the Position of Controls

Copy the control definitions for the controls whose positions you want to change from /usr/dt/appconfig/types/language/dtwm.fp to:
- System-wide: /etc/dt/appconfig/types/language/name.fp
- Personal: HomeDirectory/.dt/types/name.fp.
You must copy the entire control definition for each control to be moved.
Interchange the values of the POSITION_HINTS fields of the control definitions.
Save the file
Choose Restart Workspace Manager from the Workspace menu.

For example, the following definitions placed in a file /etc/dt/appconfig/types/C/MailHelp.fp interchange the positions of the Mail and Help Manager controls and lock these controls against personal changes.

CONTROL Mail { POSITION_HINTS 12 LOCKED True ... the rest of the control definition }

CONTROL Help { POSITION_HINTS 5 LOCKED True ... the rest of the control definition }

To Replace a Front Panel Control

Create another control definition with the same:

control_name
CONTAINER_NAME value

For example, the following two controls are defined in two different configuration files. The controls have the same control name and container name and are therefore considered the same control.

Definition in /etc/dt/appconfig/types/C/SysControls.fp:

Control ImportantApplication { CONTAINER_NAME Top CONTAINER_TYPE BOX POSITION_HINTS 2 ... }

Definition in HomeDirectory/.dt/types/MyControls.fp:

Control ImportantApplication { CONTAINER_NAME Top CONTAINER_TYPE BOX POSITION_HINTS 6 ... }

The personal control has precedence, so the control will be located at position 6.

Specifying the Icon Used by a Control

The control definition's ICON field defines the icon image used for the control.

The value of the ICON field can be:

A base file name.
The base file name is the name of the file containing the icon image minus the file-name suffixes for size (m and t) and image type (bm and pm). For example, if files are named MyGame.l.pm and MyGame.m.pm, use MyGame.
If you use the base file name, the icon files must be placed in a directory on the icon search path:
- Personal icons: HomeDirectory/.dt/icons
- System-wide icons: /etc/dt/appconfig/icons/language
An absolute path to the icon file, including the full file name.
You should use the absolute path only if the icon file is not located on the icon search path.

The size icon you need depends on the location of the control:

Location: Size
Main Panel: 48 by 48 pixels (name.l.pm or name.l.bm)
Subpanel: 24 by 24 pixels (name.s.pm or name.s.bm)

Place the icon file in one of these locations:

Personal icons: HomeDirectory/.dt/icons
System-wide icons: /etc/dt/appconfig/icons/language

Creating and Modifying Subpanels

Users can create and modify subpanels using the Front Panel pop-up menus.

This section discusses how to provide system-wide customization, which requires you to modify the Front Panel configuration files.

A subpanel is "attached" to a control in the Main Panel.

Figure 13-3 A subpanel's container is the control to which it is attached

The attachment is done in the subpanel definition. The CONTAINER_NAME field specifies the control to which the subpanel is attached:

CONTROL control_name
{
   ...
}

SUBPANEL subpanel_name
{
   CONTAINER_NAME    control_name
   ...
}

To Create a New System-Wide Subpanel

Locate the control_name of the control in the Main Panel to which you want to attach the subpanel.
If the control is one of the built-in controls, its definition is in /usr/dt/appconfig/types/language/dtwm.fp.
Create a new file /etc/dt/appconfig/types/language/*.fp.

Define the subpanel:

SUBPANEL subpanel_name { CONTAINER_NAME control_name TITLE value KEYWORD value ... }

Save the new configuration file.
Choose Restart Workspace Manager from the Workspace menu.

Customizing the Built-in Subpanels

You can modify general properties (such as the title) and the contents of the built-in subpanels.

To Modify General Properties of a Built-In Subpanel

Create a new Front Panel configuration file:
- System-wide: /etc/dt/appconfig/types/language/name.fp
- Personal: HomeDirectory/.dt/types/name.fp.
Copy the entire default SUBPANEL definition from /usr/dt/appconfig/types/language/dtwm.fp to the new file:
```
SUBPANEL   subpanel_name
{
  ... 
}
```
Modify the subpanel definition.
Save the new configuration file.
Choose Restart Workspace Manager from the Workspace menu.

For example, the following definition, placed in the file /users/janice/.dt/types/PerApps.fp, changes the name of the Personal Applications subpanel:

SUBPANEL PersAppsSubpanel { CONTAINER_NAME TextEditor TITLE Janice's Applications }

To Add a System-Wide Control to a Built-In Subpanel

Create a Front Panel configuration file /etc/dt/appconfig/types/language/name.fp.
Define the system-wide control in the file.
Use the CONTAINER_NAME and CONTAINER_TYPE fields to specify the container for the control:
```
CONTROL control_name
{
   CONTAINER_NAME   subpanel_name
   CONTAINER_TYPE   SUBPANEL
   ... 
}
```
See "Defining Front Panel Controls".
Save the configuration file.
Choose Restart Workspace Manager from the Workspace menu.

For example, the following control defined in a new file /etc/dt/appconfig/types/language/DigitalClock.fp adds the DigitalClock (in the Desktop_Tools application group) to the Personal Applications subpanel for all users.

CONTROL DigitalClockControl { TYPE icon CONTAINER_NAME PerAppsSubpanel CONTAINER_TYPE SUBPANEL ICON Dtdgclk PUSH_ACTION DigitalClock PUSH_RECALL True }

To Remove a Control from a Built-In Subpanel

Use the same procedure as for removing a Main Panel control. See "To Remove a Control".

To Remove the Install Icon Control

Add the following field to the subpanel definition:

CONTROL_INSTALL False

To Change the Auto-Close Behavior of Subpanels

The default behavior of subpanels is to close when the user chooses a control, unless the user has moved the subpanel from its original position.

The Front Panel can be configured to keep subpanels open until the user explicitly closes them.

Create a new Front Panel configuration file in:
- System-wide: /etc/dt/appconfig/types/language/*.fp
- Personal: HomeDirectory/.dt/types/*.fp
Copy the default PANEL definition from /usr/dt/appconfig/types/language/dtwm.fp to the new file:
```
PANEL FrontPanel
{
  ... 
}
```
Add the following field to the PANEL definition:
```
SUBPANEL_UNPOST    False
```
Save the new configuration file.
Choose Restart Workspace Manager from the Workspace menu.

Defining Front Panel Controls

The user can create personal controls by dropping icons on the Install Icon controls.

While this provides easy customizability, the functionality it provides is a subset of the capabilities of Front Panel controls. For example, a control created using the Install Icon control cannot:

Provide animation
Display a client window
Change appearance when an event occurs (for example, upon receiving new mail)

This section describes how to manually create Front Panel controls.

For reference information on the syntax of Front Panel controls, see the dtfpfile(4X) man page.

Front Panel Control Definitions

The structure of a Front Panel control definition is:

CONTROL control_name { TYPE control_type CONTAINER_NAME value CONTAINER_TYPE value other fields defining appearance and behavior }

Control Types

The TYPE field in the control definition specifies the basic behavior of the control.

Control TYPE: Control Behavior
icon: (Default). The control will run a specified action when the user clicks the control or drops a file on it.
blank: Placeholder used to adjust spacing of controls.
busy: Busy light. The control blinks (toggles images) when an action is invoked
client: A client window in the Front Panel.
clock: Clock.
date: Displays the current date.
file: Represents a file. Choosing the control runs the default action for the file.

To Create a New Control

This section describes the general steps for defining a control and describes how to create various types of controls.

If the control will have a PUSH_ACTION and/or DROP_ACTION, create the action definitions. These are the actions that run when the user clicks the control or drops a file on it.
Create the icon image files for the control.
For information about icon sizes, names, and locations, see "Icon Image Files".
Create a new Front Panel configuration file in:
- System-wide: /etc/dt/appconfig/types/language/*.fp
- Personal: HomeDirectory/.dt/types/*.fp
Add the control definition to the file.
Save the file.
Choose Restart Workspace Manager from the Workspace menu.

Creating a Control that Runs an Action When Clicked

Use these fields to define the control's behavior:

TYPE: Set to icon
PUSH_ACTION: Specifies the name of the action to be run

For example, the following control, which will be put in the Personal Applications subpanel, runs a game the user has acquired:

CONTROL Ball { TYPE icon CONTAINER_NAME PersAppsSubpanel CONTAINER_TYPE SUBPANEL ICON ball PUSH_ACTION RunBallGame HELP_STRING "Choose this control to play Ball." }

The following control will be located in the upper left corner of the switch. It starts an action named CutDisp.

CONTROL StartCutDisp { TYPE icon CONTAINER_NAME Switch CONTAINER_TYPE SWITCH POSITION_HINTS first ICON cutdisp HELP_STRING "Choose this control to run cutdisp." PUSH_ACTION CutDisp }

Creating a Control that Opens a File

Use these fields to define the control's behavior:

TYPE: Set to file
FILE_NAME: Specifies the path of the file to be opened
PUSH_ACTION: Set to Open

There must be an Open action defined for the data type of the file.

For example, the following control will be located on the far right side of the Main Panel. It starts Text Editor with the data file /users/ellen/PhoneList.txt. The Open action for *.txt files is part of the default action database.

CONTROL EditPhoneList { TYPE file FILE_NAME /users/ellen/PhoneList.txt CONTAINER_NAME Top CONTAINER_TYPE BOX POSITION_HINTS last ICON PhoneBook HELP_STRING "This control displays Ellen's phone list." PUSH_ACTION Open }

Creating a Control that Behaves as a Drop Zone

Use the DROP_ACTION field to specify the action that runs when the user drops a file on the control. The action must be capable of accepting a file argument.

Frequently, a control definition includes both a PUSH_ACTION and DROP_ACTION field. You can use the same action for the push and drop action.

For example, the following control, located in the Personal Applications subpanel, runs the X client xwud, which takes a file argument.

CONTROL Run_xwud { CONTAINER_NAME PerAppsSubpanel CONTAINER_TYPE SUBPANEL POSITION_HINTS 2 ICON XwudImage PUSH_ACTION RunXwud DROP_ACTION RunXwud }

Creating a Control that Monitors a File

Use these fields to define the control's behavior:

TYPE: Specify one of the following values:

icon
Use this type if you want to specify a PUSH_ACTION and/or DROP_ACTION for the control.

file
Use this type if you want the control, when chosen, to behave like the file when the file's icon is double-clicked in File Manager.
ICON and ALTERNATE_ICON:Describe the images used to indicate the non-changed and changed state of the monitored file.
MONITOR_TYPE: Describes the conditions causing the image to change. Use one of the following values:

mail
The control will change appearance when information is added to the file.

file
The control will change when the specified file becomes non-empty.
FILE_NAME: Specifies the file to be monitored.

For example, the following control looks for the presence of a file named meetings that you expect to be transferred to your system using anonymous ftp. The control is placed at the top of the Personal Applications subpanel.

CONTROL MonitorCalendar { TYPE file CONTAINER_NAME PersonalApps CONTAINER_TYPE SUBPANEL POSITION_HINTS first FILE_NAME /users/ftp/meetings MONITOR_TYPE file ICON meetingsno ALTERNATE_ICON meetingsyes }

Creating a One-Instance (Toggle) Control

A one-instance control checks to see whether the process started by the PUSH_ACTION is already running. If the process is not running, the PUSH_ACTION is run. If the process is already running, the window is moved to the top of the window stack in the current workspace.

Use these fields to define the control's behavior:

PUSH_RECALL: Set to True.
CLIENT_NAME: Specifies the name of the client to the control.
The value of CLIENT_NAME must match the first string (res_name) in the WM_CLASS property on the application's top-level window. For more information, see the xprop(1) man page.
PUSH_ACTION: Describes the action run when the user clicks the control.

For example, the following control runs one instance of an application whose action is named MyEditor.

CONTROL MyEditor { TYPE icon CONTAINER_NAME Top CONTAINER_TYPE BOX POSITION_HINTS 15 PUSH_RECALL True CLIENT_NAME BestEditor PUSH_ACTION StartMyEditor ICON MyEd }

To Create a Client Window Control

A client window control is an application window embedded in the Front Panel. For example, you can put a system load meter in the Front Panel by creating an xload client window control.

Define the control.
Use these fields to define the control's behavior:
- TYPE: Set to client.
- CLIENT_NAME: Specifies the client to be started.
  The value of CLIENT_NAME must match the first string (res_name) in the WM_CLASS properly on the application's top-level window. For more information, see the xprop(1) man page.
- CLIENT_GEOMETRY: Specifies the size, in pixels, needed for the client's Front Panel window.
  The xwininfo(1) man page describes how to find out the size of a window in pixels.
Choose Restart Workspace Manager from the Workspace menu.
Start the client from a terminal emulator command line.

For example, the following control displays a 30 X 20 pixel load meter.

CONTROL LoadMeter { TYPE client CONTAINER_NAME Top CONTAINER_TYPE BOX CLIENT_NAME xload CLIENT_GEOMETRY 30x20 }

If the client is not saved and restored between sessions, you may want to configure the control to start the client when the user clicks it. For example, you can configure the LoadMeter control to start xload by adding the following line to the definition:

PUSH_ACTION StartXload

and creating the action:

ACTION StartXload { WINDOW_TYPE NO_STDIO EXEC_STRING /usr/contrib/bin/X11/xload }

To Animate a Control

You can attach an animation sequence to be used when the user chooses the control or drops an object on it.

In order to have an animation sequence, a control must:

Be type icon
Have a PUSH_ACTION or DROP_ACTION

Specify the animation sequence using the ANIMATION component:
```
ANIMATION animation_name
{
   icon_image       [delay]
   icon_image       [delay]
   ... 
}
```
where delay is the time delay between animation icons, in milliseconds.
Add the PUSH_ANIMATION and/or DROP_ANIMATION fields to the control definition. The value is the name of the ANIMATION sequence.

For example, the following lines animate a control that starts the BestEditor application. The time delay between icons is 300 milliseconds. The example assumes you've created icon files frame1, frame2, etc.

CONTROL BestEditor
{
   ... 
   PUSH_ANIMATION    BestEdAnimation
   ... 
}

ANIMATION BestEdAnimation
{
   frame1           300
   frame2
   ... 
}

Providing On Item Help for Front Panel Controls

There are two ways to provide help for a control:

Providing a help sting in the control definition.
The help string is displayed in the help viewer when the user invokes on-item help for the control. The help string cannot include formatting (such as headings) or links.
To provide a help string, specify the help string in the control definition:
```
HELP_STRING    help_string
```
Specifying a help topic in a registered help volume.
A help topic is information authored using the full capabilities of the help system. Authoring a help topic requires you to use the desktop Help Developer's Kit.
To provide a help topic, specify the help volume and topic ID in the control definition:
```
HELP_VOLUME    help_volume_name
HELP_TOPIC     topic_id
```

Customizing the Workspace Switch

There are several ways to customize the workspace switch:

Changing the number of workspaces
Changing the layout of the switch
Changing the controls in the switch

To Change the Default Number of Workspaces

Modify the following Workspace Manager resource:

Dtwm*workspaceCount: n

For more information, see "To Change the Number of Workspaces on a System-Wide Basis".

To Change the Number of Switch Rows

Modify the NUMBER_OF_ROWS field in the SWITCH definition.

For example, the following definition defines a three-row switch.

SWITCH Switch
{
   CONTAINER_NAME    box_name
   NUMBER_OF_ROWS    3
   ... 
}

To Change or Add Controls in the Workspace Switch

Create a Front Panel configuration file with the control definition.
- Specify that the control be inside the switch:
```
CONTAINER_NAME    Switch
CONTAINER_TYPE    SWITCH
```
- Specify the position in the switch:
```
POSITION_HINTS    n
```
  where n is an integer. The positions are numbered sequentially left-to-right, top-to-bottom. (For the default two-row switch, the positions are 1 through 4.)
Create the icon for the control. The recommended size is 16 by 16 pixels.

For example, the following control puts a Terminal control in the switch.

CONTROL SwitchTerminal { TYPE icon CONTAINER_NAME Switch CONTAINER_TYPE SWITCH POSITION_HINTS 3 ICON Fpterm LABEL Terminal PUSH_ACTION Dtterm HELP_TOPIC FPOnItemTerm HELP_VOLUME FPanel }

The control uses a built-in icon and the same help topic used by the Terminal control in the Personal Applications subpanel.

General Front Panel Configuration

Front Panel's PANEL syntax allows you to:

Change the location of the Front Panel
Change the window decoration
Set general appearance and behavior of controls

The default PANEL description is in /usr/dt/appconfig/types/language/dtwm.fp.

For additional information, see the dtfpfile(4X) man page.

General Steps

Create a new Front Panel configuration file in /etc/dt/appconfig/types/language or HomeDirectory/.dt/types.
Copy the default PANEL description from /usr/dt/appconfig/types/language/dtwm.fp to the new file.
Edit the PANEL description.

The new PANEL description has precedence over the default one.

To Change the Default Front Panel Location

Use the PANEL_GEOMETRY field in the PANEL definition to specify the location.

For example, the following panel is in the upper right corner.

PANEL SpecialFrontPanel
{
  PANEL_GEOMETRY    -1+1
  ...
}

To Label Controls in the Main Panel

Add the following line to the PANEL definition:
```
DISPLAY_CONTROL_LABELS   True
```
Add a LABEL field to each control.

The control_name is used if no LABEL is specified.

To Change the Click Behavior of Controls

Use the CONTROL_BEHAVIOR field in the PANEL definition to specify how the user runs a control's PUSH_ACTION. Values for the field are:

single_click: The user clicks the control to run the PUSH_ACTION
double_click: The user double-clicks the control to run the PUSH_ACTION

To Create an Entirely New Front Panel

Creating a new Front Panel may be preferable when you want to make extensive changes.

To avoid conflict with the built-in Front Panel components, an entirely new Front Panel should use new names for the PANEL and other containers.

Create the PANEL component for the new Front Panel. Give it a unique name:
```
PANEL front_panel_name
{
   ...
}
```
Create the new boxes and controls, using the new container names.
If you want to use existing components, you must copy their definitions and change the CONTAINER_NAME value.
Choose Restart Workspace Manager from the Workspace menu.

Example of Creating a Personal Front Panel with Three Rows

The following example changes the default Front Panel so that its controls are organized into three rows.

Copy /usr/dt/appconfig/types/language/dtwm.fp to HomeDirectory/.dt.types/MyFrontPanel.fp. Give the file write permission.
This is the file you will edit to provide the new Front Panel.
Change the name of the Front Panel:
```
PANEL NewFrontPanel
```

Change the name of the box named Top and edit its container name:

BOX NewFrontPanelTop { CONTAINER_NAME NewFrontPanel POSITION_HINTS first ... }

Add box definitions for the middle and bottom rows:

BOX NewFrontPanelMiddle { CONTAINER_NAME NewFrontPanel POSITION_HINTS second }

BOX NewFrontPanelBottom { CONTAINER_NAME NewFrontPanel POSITION_HINTS second }

Change the CONTAINER_NAME of the following controls to NewFrontPanelTop:
- Clock
- Date
- Home
- TextEditor
- Mail
Change the CONTAINER_NAME of the following controls to NewFrontPanelBottom:
- Printer
- Style
- Applications
- Help
- Trash
Change the CONTAINER_NAME of the switch to NewFrontPanelMiddle.
Set the resource:
```
Dtwm*frontPanel*name:  NewFrontPanel
```
Choose Restart Workspace Manager from the Workspace menu.

Generated with CERN WebMaker

13 Advanced Front Panel Customization

See Also

Default Front Panel Configuration File

Search Path for Front Panel Configuration Files

How the Front Panel Is Assembled: Precedence Rules

To Prevent Personal Customizations

To Restore a Deleted Control or Subpanel

Front Panel Components

General Syntax of the Front Panel Definition

To Add a Control to the Main Panel

To Modify a Control

To Interchange the Position of Controls

To Replace a Front Panel Control

To Create a New System-Wide Subpanel

Customizing the Built-in Subpanels

To Modify General Properties of a Built-In Subpanel

To Add a System-Wide Control to a Built-In Subpanel

To Remove a Control from a Built-In Subpanel

To Remove the Install Icon Control

To Change the Auto-Close Behavior of Subpanels

Front Panel Control Definitions

To Create a New Control

Creating a Control that Runs an Action When Clicked

Creating a Control that Behaves as a Drop Zone

Creating a Control that Monitors a File

Creating a One-Instance (Toggle) Control

To Create a Client Window Control

To Animate a Control

Providing On Item Help for Front Panel Controls

To Change the Default Number of Workspaces

To Change the Number of Switch Rows

To Change or Add Controls in the Workspace Switch

General Steps

To Change the Default Front Panel Location

To Label Controls in the Main Panel

To Change the Click Behavior of Controls

To Create an Entirely New Front Panel

Example of Creating a Personal Front Panel with Three Rows

13 Advanced Front Panel
Customization