HP OpenVMS Systems Documentation
HP DECwindows Motif
The X Session Management Protocol (XSMP) provides a standard way for users to save client sessions. Each session is controlled by a network service known as the session manager. The session manager issues commands that direct client applications to save their state information for use during subsequent sessions.
This protocol is built on top of ICE, which manages the client connections to the session manager server.
Code that uses XSMP must include the following header files:
# include "DECW$INCLUDE:SM.h" # include "DECW$INCLUDE:SMlib.h" # include "DECW$INCLUDE:SMproto.h"
The following sections describe the implementation of XSMP provided
with HP DECwindows Motif for HP OpenVMS Alpha Version 1.3, highlighting any variances from or restrictions
posed by the standard implementation. For a detailed description of the
XSMP protocol and the available server requests, see the X Window
System (Scheifler and Gettys) series of manuals published by
Butterworth-Heinemann, or visit the X.Org web site (http://www.x.org)
for the X Window System protocol and library specifications.
220.127.116.11 Multithreading Considerations
The implementation of XSMP is thread safe, using locks on the underlying ICE connection as needed. All send message operations are thread cancellation points; all callback operations are made by locking the associated ICE connection.
When SmcOpenConnection is called, it opens an ICE connection and
processes messages until the session manager registers the client. The
open connection subsequently causes a series of ICE watch procedures to
be called. Typically, these procedures add the connection to a list
monitored for input. IceProcessMessages is called when input to the
list arrives. The thread issuing the IceProcessMessages calls will be
blocked if it tries to handle a new connection.
18.104.22.168 Differences from the Standard Implementation
The following sections describe differences from and issues in the standard XSMP implementation provided with X11R6.6.
SmcCloseConnection and SmsCleanUp
In the standard implementation, SmcCloseConnection disables shutdown negotiation for an ICE connection, which results in abrupt termination of the connection. This can prevent the session manager from receiving all SmCloseConnection messages.
In the DECwindows Motif implementation, shutdown negotiation is enabled. SmcCloseConnection returns SmcClosedASAP, and the connection is closed only after the session manager calls SmsCleanUp.
Note also that the sample session manager code does not specify whether SmsCleanUp closes an ICE Connection. In the DECwindows Motif implementation, an IceCloseConnection call is issued.
POSIX Property Names and Data Type Definitions
The standard specification defines the data types and property names supported for POSIX. The DECwindows Motif implementation specifies the property names; however, the data types definitions are not provided, since they may vary based on the use of session manager in the OpenVMS Alpha environment.
This chapter provides information about new features that pertain to
all users of DECwindows Motif.
4.1 General DECwindows Motif Environment
This section describes new features that are common to both the New
Desktop and traditional DECwindows desktop environments.
4.1.1 Extended File Specification (EFS) Support
In general, DECwindows Motif supports the Extended File Specifications
(EFS) option provided in OpenVMS Alpha. The interface either supports
the new ODS-5 file names or provides an error message indicating that
the particular component does not support the new names.
22.214.171.124 File Selection Popup Window
The standard file selection popup window used by most DECwindows Motif
applications fully supports ODS-5 style file names. The window supports
deep directories, case preservation, and extended-length file names.
The window supports entry of file names using the extended file name
character and displays files using the extended file name character set
using the circumflex character (^). See the current OpenVMS
documentation for more specific information about using deep
directories and the extended file name character set.
126.96.36.199 New Desktop and the FileView Application
With an ODS-5 volume, the FileView application supports deep directories, case preservation, and extended-length file names. FileView supports entry of file names using the extended file name character and displays files using the extended file name character set using the circumflex character (^). See the current OpenVMS documentation for more specific information about using deep directories and the extended file name character set.
Any custom FileView command extensions must be modified to support EFS.
188.8.131.52 Traditional Desktop and the File Manager Application
The File Manager application supports case preservation and creates files with the extended file name character set, but does not support any operations on its files.
The File Manager application supports deep directories and
extended-length file names with the following restriction. As indicated
in the OpenVMS Guide to Extended File Support, ODS-5 volumes allow file names up to 236 8-bit
characters in length and deep directory structures if the total file
specification does not exceed 512 8-bit characters in length. The
current version of the File Manager supports extended-length file names
and deep directory structures with the additional restriction that a
total file specification cannot exceed 235 8-bit characters in length.
Exceeding this limit causes an error message for some menu items.
184.108.40.206 The Programming Libraries
The programming libraries fully support deep directories and
extended-length file names. However, the libraries do not support case
preservation or the extended file name character set.
220.127.116.11 Translated Image Support (TIS) Library
The translated image support (TIS) library has not been updated to
4.1.2 Color Customizer Example Program
The color customizer example program allows you to dynamically control
the colors of your workstation environment. Window, icon, and window
manager colors can be changed individually or as part of a palette
switch. You can control mapping between resources and color cells, as
well as the size and contents of the palette set. Also, automatic
shadowing with the standard Motif shadowing algorithms is supported.
18.104.22.168 Supported Displays
The color customizer supports any display using pseudocolor or
grayscale visuals. This includes most 4- and 8-plane workstation
22.214.171.124 Supported Applications
The color customizer can affect the colors of any applications that use the current release of the DECwindows X Toolkit Library. Applications from other vendors and previous versions of the X Toolkit Library are unaffected.
If the color customizer is used to control the colors of applications that have their own color customization dialog boxes (like the Session Manager, Window Manager, and DECwindows Mail), those application-specific color customization dialog boxes may not reflect the correct current color values while the customizer is running the application. This is normal; use the customizer instead of the application-specific dialog box to change these color values.
To build the color customizer on OpenVMS systems, perform the following steps:
$ SET DEFAULT SYS$LOGIN $ CREATE/DIRECTORY [.CUSTOMIZER] $ SET DEFAULT [.CUSTOMIZER] $ COPY DECW$EXAMPLES:CUSTOM.C  $ COPY DECW$EXAMPLES:CUSTOM.UIL  $ COPY DECW$EXAMPLES:CUSTOMIMAGE.DAT  $ COPY DECW$EXAMPLES:XSETROOT_CUST.C  $ COPY DECW$EXAMPLES:BUILD_CUSTOMIZER.COM 
This command procedure creates the following output files:
To run the color customizer, perform the following steps:
$ RUN CUSTOM
Only the colors of applications invoked after the customizer starts will be affected. For this reason, start the customizer as the first X application during the login process.
As noted in Section 126.96.36.199, the color customizer should be the first X application started during the login process. Do this by starting it as a subprocess from within the DECW$LOGIN.COM file. Add a command to wait approximately 10 seconds between customizer startup and the startup of other applications.
For example, add the following lines to the DECW$LOGIN.COM file:
$! Starting the color customizer $ DISPLAY = F$LOGICAL("DECW$DISPLAY") $ SPAWN/NOWAIT/OUTPUT='DISPLAY' RUN SYS$LOGIN:CUSTOM.EXE $ WAIT 0:0:10
See Using DECwindows Motif for OpenVMS and Managing DECwindows Motif for OpenVMS Systems for more information on the file
188.8.131.52 Command Interface Summary
A box containing a list of available palettes is in the leftmost section of the Color Customizer window. Click on the desired palette to see the colors take affect.
Below the palettes are two arrays of colored buttons, representing the dynamically allocated color cells for normal and shadow colors. To find out what resources are affected by a color cell, click and hold the arrow button next to the color cell.
As a shortcut, you can click on the screen facsimile in the rightmost corner of the dialog box. If the portion you click on is colored by one of the resource values controlled by the customizer, the pop-up window for the appropriate color button is displayed.
To modify a single color cell, click on the corresponding color button. A colormix widget pops up; as you modify the color, these modifications are reflected in your workstation environment. Use the colormix widget reset button to return to the starting color at any time. You can also change the color cell you are modifying by clicking on a different color button while the colormix widget is displayed.
The automatic shadowing option causes shadow and select colors to be automatically updated when their corresponding background colors are changed. The standard Motif shadowing algorithms are used for these calculations.
Use the File menu to modify, add, and delete color palettes as follows:
Changes made through the File menu automatically update the CUSTOM.DAT file, which contains the resource defaults.
The File menu Exit button causes the customizer application to exit. A
warning dialog is displayed first. Note that the color cells allocated
by the customizer (and used by the currently running applications) will
be deallocated. After the customizer exits, if the colors of the
currently running applications are not correct, the applications should
be restarted to restore normal colors. Usually, there is no need to
exit the color customizer; it is typically kept running at all times,
like the Session Manager.
184.108.40.206 Changing the Mapping Between Color Resources and Color Cells
The file DXMDEFAULTS.DAT allows you to control how many dynamic color cells are allocated and what resources are affected. This file contains resource specifications like the following:
*background: DXmDynamicWindowBackground *foreground: DXmDynamicWindowForeground *topShadowColor: DXmDynamicWindowTopShadow
When the customizer is started, the file DXMDEFAULTS.DAT is written to a property on the root window. Any application that is subsequently run and that uses the correct X Toolkit Library merges these resources with its normal resource database. Resource specifications in this file take precedence over specifications with equivalent resource names in other resource default files.
The resource values within the file DXMDEFAULTS.DAT have a special format. For each unique color value in this file that begins with the string "DXmDynamic", a color button is created in the color customizer. If the string "Shadow" is encountered in a name, the color button is placed in the shadow button box rather than the normal color button box. If a color value string ends with the suffix "Background", it is linked to any color buttons with identical prefixes and suffixes of "TopShadow", "BottomShadow", or "SelectColor" for purposes of automatic shadowing. If a color value named "DXmDynamicScreenBackground" is encountered, the color cell allocated is used by the customizer to set the root window background color.
You can edit the file DXMDEFAULTS.DAT and define resources to use the same color cells. You can have separate dynamic color cells, for scrollbar widgets or for your DECwindows Mail application, for example, by adding the following lines to the file DXMDEFAULTS.DAT:
Mail*background: DXmDynamicMyMailBackground Mail*foreground: DXmDynamicMyMailForeground Mail*topShadowColor: DXmDynamicMyMailTopShadow Mail*bottomShadowColor: DXmDynamicMyMailBottomShadow
Adding the previous lines to the file DXMDEFAULTS.DAT and restarting the customizer causes four new color cells to be allocated and four new color buttons to be added to the customizer interface. These buttons are assigned default color values (usually black or white) for each palette. These defaults can then be modified for each palette through the customizer interface.
The text of the DXMDEFAULTS.DAT file is read and parsed by the color customizer. The parsing algorithm does not allow comments, incorrect spacing, or incorrect resource specifications. If this file or the CUSTOM.DAT resource file become corrupt, the customizer cannot start correctly. To resolve the problem, copy the versions of CUSTOM.DAT and DXMDEFAULTS.DAT from the DECW$EXAMPLES directory into your login directory.
To change the colors of DECterm windows, copy the DECterm resource specifications from the file DXMDEFAULTS.DAT and add them to the DECterm resource defaults file DECW$USER_DEFAULTS:DECW$TERMINAL_DEFAULT.DAT. For example, add the following lines to the DECterm resource defaults file:
. . . DECW$TERMINAL.main.terminal.background: DXmDynamicTerminalBackground DECW$TERMINAL.main.terminal.foreground: DXmDynamicTerminalForeground
This allows the DECterm window colors to be customized with the color
220.127.116.11 Changing the Default Value of the Automatic Shadowing Toggle Button
The default value of the automatic shadowing toggle button is set using the Custom.autoShadow resource in the CUSTOM.DAT file as follows:
The default value is True.
18.104.22.168 Using the Customizer on Multihead Systems
The color customizer affects only applications started on the same screen as the customizer. On most multihead systems, you can start a different color customizer for each screen and have a different palette in effect on each screen. On multihead systems using XINERAMA, a single instance of the color customizer affects all applications, since the screens function as a single logical screen.
The color customizer can be configured so that it is invoked once and affects all applications regardless of where they are started. This mode is invoked by modifying the Custom.multiScreen resource in the CUSTOM.DAT file as follows:
The default value is False.
22.214.171.124 Using the XSETROOT_CUST.EXE Demonstration Program
The XSETROOT_CUST.EXE demonstration program, created during the customizer build, is a modified version of the MIT utility program xsetroot that is used to set a bitmap on the root window. The XSETROOT_CUST.EXE program uses DXmDynamicScreenBackground and DXmDynamicScreenForeground as the background and foreground colors of the specified bitmap. If your DXMDEFAULTS.DAT file contains entries for these two dynamic colors, then use the customizer to dynamically modify the colors of your bitmap.
$ XSETROOT_CUST :== "$SYS$LOGIN:XSETROOT_CUST.EXE" $ XSETROOT_CUST -BITMAP your_xbm_file.XBM
The drag-and-drop feature lets you move or copy screen objects. This feature is provided primarily for programmers who choose to incorporate drag-and-drop into their applications. For example, you can move text from a text entry area and paste it elsewhere.
All DECwindows Motif applications except Notepad support the drag-and-drop feature. DECwindows Mail supports the drag-and-drop feature in all windows except the main message area, where DECwindows Mail has its own drag-and-drop; you can use MB2 to move messages around with the SVN interface.
To drag and drop text into a new location:
Most DECwindows Motif applications allow you to tear off pull-down and popup menus. Tear-off menus let you keep frequently used menus displayed without repeatedly pulling them down or popping them up.
To tear off a menu:
To close a tear-off menu:
This section describes new features related to the New Desktop
4.2.1 Screen Saver and Screen Lock Support
New Desktop now supports the MIT Screen Saver extension (MIT-SCREEN-SAVER), which is available on systems running on OpenVMS Alpha Version 7.1 or greater. This extension enables you to use the following features, which are available from the Style Manager Screen dialog box:
For more information on using the screen saver and screen lock
components of the Style Manager, see the online help for the Style
4.2.2 Updated Welcome Message
The welcome message in the Login Screen now displays a host name regardless of the transport. If the DECnet transport is configured, the DECnet host name is displayed. If the TCP/IP transport is configured, the TCP/IP host name is displayed. If neither transport is configured, a default message of "Welcome to OpenVMS" is displayed.