a dynamic resource editor for X Toolkit applications
Get Widget Tree Allows the user to click on any application that speaks the ed‐ itres protocol and receive its widget tree. Refresh Current Widget Tree Editres only knows about the widgets that exist at the present time. Many applications create and destroy widgets on the fly. Selecting this menu item will cause editres to ask the applica‐ tion to resend its widget tree, thus updating its information to the new state of the application. For example, xman only creates the widgets for its topbox when it starts up. None of the widgets for the manual page window are created until the user actually clicks on the Manual Page button. If you retrieved xman's widget tree before the the manual page is active, you may wish to refresh the widget tree after the manual page has been displayed. This will allow you to also edit the manual page's resources. Dump Widget Tree to a File For documenting applications it is often useful to be able to dump the entire application widget tree to an ASCII file. This file can then be included in the manual page. When this menu item is selected a popup dialog is activated. Type the name of the file in this dialog, and either select okay, or type a car‐ riage-return. Editres will now dump the widget tree to this file. To cancel the file dialog, select the cancel button. Show Resource Box This command will popup a resource box for the current applica‐ tion. This resource box (described in detail below) will allow the user to see exactly which resources can be set for the wid‐ get that is currently selected in the widget tree display. Only one widget may be currently selected; if greater or fewer are selected editres will refuse to pop up the resource box and put an error message in the Message Area. Set Resource This command will popup a simple dialog box for setting an ar‐ bitrary resource on all selected widgets. You must type in the resource name, as well as the value. You can use the Tab key to switch between the resource name field the resource value field. Quit Exits editres.
The Tree menu contains several commands that allow operations to be performed on the widget tree. Select Widget in Client This menu item allows you to select any widget in the applica‐ tion; editres will then highlight the corresponding element the widget tree display. Once this menu item is selected the pointer cursor will again turn to a crosshair, and you must click any pointer button in the widget you wish to have dis‐ played. Since some widgets are fully obscured by their chil‐ dren, it is not possible to get to every widget this way, but this mechanism does give very useful feedback between the ele‐ ments in the widget tree and those in the actual application. Select All Unselect All Invert All These functions allow the user to select, unselect, or invert all widgets in the widget tree. Select Children Select Parents These functions select the immediate parent or children of each of the currently selected widgets. Select Descendants Select Ancestors These functions select all parents or children of each of the currently selected widgets. This is a recursive search. Show Widget Names Show Class Names Show Widget IDs Show Widget Windows When the tree widget is initially displayed the labels of each widget in the tree correspond to the widget names. These func‐ tions will cause the label of all widgets in the tree to be changed to show the class name, IDs, or window associated with each widget in the application. The widget IDs, and windows are shown as hex numbers. In addition there are keyboard accelerators for each of the Tree opera‐ tions. If the input focus is over an individual widget in the tree, then that operation will only effect that widget. If the input focus is in the Tree background it will have exactly the same effect as the corresponding menu item. The translation entries shown may be applied to any widget in the ap‐ plication. If that widget is a child of the Tree widget, then it will only affect that widget, otherwise it will have the same effect as the commands in the tree menu. Flash Active Widgets This command is the inverse of the Select Widget in Client com‐ mand, it will show the user each widget that is currently se‐ lected in the widget tree, by flashing the corresponding widget in the application numFlashes (three by default) times in the flashColor. Key Option Translation Entry - space Unselect Select(nothing) w Select Select(widget) s Select Select(all) i Invert Select(invert) c Select Children Select(children) d Select Descendants Select(descendants) p Select Parent Select(parent) a Select Ancestors Select(ancestors) N Show Widget Names Relabel(name) C Show Class Names Relabel(class) I Show Widget IDs Relabel(id) W Show Widget Windows Relabel(window) T Toggle Widget/Class Name Relabel(toggle) Clicking button 1 on a widget adds it to the set of selected widgets. Clicking button 2 on a widget deselects all other wid‐ gets and then selects just that widget. Clicking button 3 on a widget toggles its label between the widget's instance name the widget's class name.
USING THE RESOURCE BOX
The resource box contains five different areas. Each of the areas, as
they appear on the screen, from top to bottom will be discussed.
The Resource Line
This area at the top of the resource box shows the current re‐
source name exactly as it would appear if you were to save it to
a file or apply it.
The Widget Names and Classes
This area allows you to select exactly which widgets this re‐
source will apply to. The area contains four lines, the first
contains the name of the selected widget and all its ancestors,
and the more restrictive dot (.) separator. The second line
contains less specific the Class names of each widget, and well
as the less restrictive star (*) separator. The third line con‐
tains a set of special buttons called Any Widget which will gen‐
eralize this level to match any widget. The last line contains
a set of special buttons called Any Widget Chain which will turn
the single level into something that matches zero or more lev‐
The initial state of this area is the most restrictive, using
the resource names and the dot separator. By selecting the
other buttons in this area you can ease the restrictions to al‐
low more and more widgets to match the specification. The ex‐
treme case is to select all the Any Widget Chain buttons, which
will match every widget in the application. As you select dif‐
ferent buttons the tree display will update to show you exactly
which widgets will be effected by the current resource specifi‐
Normal and Constraint Resources
The next area allows you to select the name of the normal or
constraint resources you wish to set. Some widgets may not have
constraint resources, so that area will not appear.
This next area allows you to enter the resource value. This
value should be entered exactly as you would type a line into
your resource file. Thus it should contain no unescaped new-
lines. There are a few special character sequences for this
\n - This will be replaced with a newline.
\### - Where # is any octal digit. This will be replaced with a
single byte that contains this sequence interpreted as an octal
number. For example, a value containing a NULL byte can be
stored by specifying \000.
BLOCKING EDITRES REQUESTS
The editres protocol has been built into the Athena Widget set. This allows all applications that are linked against Xaw to be able to speak to the resource editor. While this provides great flexibility, and is a useful tool, it can quite easily be abused. It is therefore possible for any Xaw application to specify a value for the editresBlock re‐ source described below, to keep editres from divulging information about its internals, or to disable the SetValues part of the protocol. editresBlock (Class EditresBlock) Specifies which type of blocking this application wishes to im‐ pose on the editres protocol. The accepted values are: all Block all requests. setValues Block all SetValues requests. As this is the only ed‐ itres request that actually modifies the application, this is in effect stating that the application is read- only. none Allow all editres requests. Remember that these resources are set on any Xaw application, not ed‐ itres. They allow individual applications to keep all or some of the requests editres makes from ever succeeding. Of course, editres is also an Xaw application, so it may also be viewed and modified by ed‐ itres (rather recursive, I know), these commands can be blocked by set‐ ting the editresBlock resource on editres itself.
For editres the available application resources are: numFlashes (Class NumFlashes) Specifies the number of times the widgets in the application will be flashed when the Show Active Widgets command in in‐ voked. flashTime (Class FlashTime) Amount of time between the flashes described above. flashColor (Class flashColor) Specifies the color used to flash application widgets. A bright color should be used that will immediately draw your at‐ tention to the area being flashed, such as red or yellow. saveResourcesFile (Class SaveResourcesFile) This is the file the resource line will be append to when the Save button activated in the resource box.
In order to specify resources, it is useful to know the hierarchy of
the widgets which compose editres. In the notation below, indentation
indicates hierarchical structure. The widget class name is given
first, followed by the widget instance name.
DISPLAY to get the default host and display number. XENVIRONMENT to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.
/etc/X11/app-defaults/Editres specifies required resources
editres [ -toolkitoption ... ]
Editres accepts all of the standard X Toolkit command line options (see X(7)). The order of the command line options is not important.
Editres is a tool that allows users and application developers to view the full widget hierarchy of any X Toolkit application that speaks the Editres protocol. In addition, editres will help the user construct resource specifications, allow the user to apply the resource to the application and view the results dynamically. Once the user is happy with a resource specification editres will append the resource string to the user's X Resources file.
Editres provides a window consisting of the following four areas: Menu Bar A set of popup menus that allow you full ac‐ cess to editres's features. Panner The panner allows a more intuitive way to scroll the application tree display. Message Area Displays information to the user about the ac‐ tion that editres expects of her. Application Widget Tree This area will be used to display the selected application's widget tree. To begin an editres session select the Get Widget Tree menu item from the command menu. This will change the pointer cursor to cross hair. You should now select the application you wish look at by clicking on any of its windows. If this application understands the editres proto‐ col then editres will display the application's widget tree in its tree window. If the application does not understand the editres protocol editres will inform you of this fact in the message area after a few seconds delay. Once you have a widget tree you may now select any of the other menu options. The effect of each of these is described below.
This is a prototype, there are lots of nifty features I would love to add, but I hope this will give you some ideas about what a resource ed‐ itor can do.
X(7), xrdb(1), Athena Widget Set
Chris D. Peterson, formerly MIT X Consortium