NAME
editres - a dynamic resource editor for X Toolkit
applications
SYNTAX
editres [ -toolkitoption ... ]
OPTIONS
Editres accepts all of the standard X
Toolkit command line options (see ). The
order of the command line options is not important.
DESCRIPTION
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.
USING EDITRES
Editres provides a window consisting
of the following four areas:
- Menu Bar
- A set of popup menus that allow you full access 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 action 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 protocol 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.
COMMANDS
- Get Widget Tree
- Allows the user to click on any application that speaks the
editres 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 application
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
carriage-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
application. This resource box (described in detail below) will
allow the user to see exactly which resources can be set for the
widget 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
arbitrary 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.
TREE COMMANDS
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
application; 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 displayed. Since
some widgets are fully obscured by their children, it is not
possible to get to every widget this way, but this mechanism does
give very useful feedback between the elements 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 Windows
- When the tree widget is initially displayed the labels of each
widget in the tree correspond to the widget names. These functions
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
operations. 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 application. 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 command, it will show the user each widget that is
currently selected 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 widgets
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
resource 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
resource 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
contains a set of special buttons called Any Widget which
will generalize 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 levels.
- 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 allow more
and more widgets to match the specification. The extreme case is to
select all the Any Widget Chain buttons, which will match
every widget in the application. As you select different buttons
the tree display will update to show you exactly which widgets will
be effected by the current resource specification.
- 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.
- Resource Value
- 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 file:
- \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.
\<new-line> - This will compress to nothing.
\\ - This will compress to a single backslash.
- Command Area
- This area contains several command buttons, described in this
section.
- Set Save File
- This button allows the user to modify file that the resources
will be saved to. This button will bring up a dialog box that will
ask you for a filename; once the filename has been entered, either
hit carriage-return or click on the okay button. To pop down
the dialog box without changing the save file, click the
cancel button.
- Save
- This button will append the resource line described
above to the end of the current save file. If no save file has been
set the Set Save File dialog box will be popped up to prompt
the user for a filename.
- Apply
- This button attempts to perform a XtSetValues call on all
widgets that match the resource line described above. The
value specified is applied directly to all matching widgets. This
behavior is an attempt to give a dynamic feel to the resource
editor. Since this feature allows users to put an application in
states it may not be willing to handle, a hook has been provided to
allow specific applications to block these SetValues requests (see
Blocking Editres Requests below).
- Unfortunately due to design constraints imposed on the widgets
by the X Toolkit and the Resource Manager, trying to coerce an
inherently static system into dynamic behavior can cause strange
results. There is no guarantee that the results of an apply will be
the same as what will happen when you save the value and restart
the application. This functionality is provided to try to give you
a rough feel for what your changes will accomplish, and the results
obtained should be considered suspect at best. Having said that,
this is one of the neatest features of editres, and I strongly
suggest that you play with it, and see what it can do.
- Save and Apply
- This button combines the Save and Apply actions described above
into one button.
- Popdown Resource Box
- This button will remove the resource box from the
display.
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 resource
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
impose on the editres protocol.
The accepted values are:
- all
- Block all requests.
- setValues
- Block all SetValues requests. As this is the only editres
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 editres. 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 editres (rather recursive, I know), these
commands can be blocked by setting the editresBlock resource
on editres itself.
RESOURCES
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
invoked.
- 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 attention 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.
WIDGETS
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.
Editres editres
Paned paned
Box box
MenuButton commands
SimpleMenu menu
SmeBSB sendTree
SmeBSB refreshTree
SmeBSB dumpTreeToFile
SmeLine line
SmeBSB getResourceList
SmeLine line
SmeBSB quit
MenuButton treeCommands
SimpleMenu menu
SmeBSB showClientWidget
SmeBSB selectAll
SmeBSB unselectAll
SmeBSB invertAll
SmeLine line
SmeBSB selectChildren
SmeBSB selectParent
SmeBSB selectDescendants
SmeBSB selectAncestors
SmeLine line
SmeBSB showWidgetNames
SmeBSB showClassNames
SmeBSB showWidgetIDs
SmeBSB showWidgetWindows
SmeLine line
SmeBSB flashActiveWidgets
Paned hPane
Panner panner
Label userMessage
Grip grip
Porthole porthole
Tree tree
Toggle <name of widget in application>
.
.
.
TransientShell resourceBox
Paned pane
Label resourceLabel
Form namesAndClasses
Toggle dot
Toggle star
Toggle any
Toggle name
Toggle class
.
.
.
Label namesLabel
List namesList
Label constraintLabel
List constraintList
Form valueForm
Label valueLabel
Text valueText
Box commandBox
Command setFile
Command save
Command apply
Command saveAndApply
Command cancel
Grip grip
Grip grip
ENVIRONMENT
- 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.
FILES
- /usr/share/X11/app-defaults/Editres
- specifies required resources
SEE ALSO
x(7), xrdb(1), Athena
Widget Set
RESTRICTIONS
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 editor can do.
AUTHOR
Chris D. Peterson, formerly MIT X Consortium