XtParent(3) XT FUNCTIONS XtParent(3)NAME
XtParent - obtain widget's parent widget id
SYNTAX
Widget XtParent(Widget w);
ARGUMENTS
w Specifies the widget.
DESCRIPTION
XtParent returns the widget's parent widget ID.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.1.3 XtParent(3)
Check Out this Related Man Page
Constraint destroy() Constraint destroy()
Name
Constraint destroy - Constraint class method for freeing resources associated with a child's constraint record.
Synopsis
typedef void (*XtWidgetProc)(Widget);
Widget w;
Inputs
w Specifies the widget being destroyed.
Description
The Constraint destroy() method is registered on the destroy field of the Constraint class part structure (which is not the same as the
destroy field of the Object or Core class part structure). It is called by XtDestroyWidget() when the child of a constraint widget is
destroyed, and should deallocate any memory or resources associated with the part of the constraint record of w that is owned by the class.
It should not deallocate the constraint record itself.
This method is similar to the Object destroy() method. The Constraint destroy() methods of a widget class and its superclasses are called
in subclass-to-superclass order, starting at the class of the parent of w, and ending at the Constraint class. Therefore, the Constraint
destroy() method should deallocate only memory and resources associated with the part of the constraint record specific to its class, and
not the memory or resources allocated by any of its superclasses.
The Constraint destroy() method is chained, and so cannot be inherited. If a constraint widget does not need to deallocate any memory or
resources associated with its constraint part structure, the destroy field in its Constraint class part record can be NULL.
See destroy(4) for more information about what should be freed and what should not. See XtDestroyWidget(1) for details on the widget and
object destruction process.
Example
The following procedure is the Constraint destroy() method of the Xaw Tree widget. Note that it uses a macro (defined below) to cast the
specified widget's constraint field appropriately, and calls XtParent() on the specified widget to obtain the Tree widget itself.
This procedure is a somewhat unusual example, because it does not directly call XtFree(), XtReleaseGC(), or similar functions on fields of
the constraint record. The constraint records of the Tree class are linked in a tree structure, and this procedure is used to remove a
node from that tree. This might have been more appropriate in the delete_child() method instead.
static void ConstraintDestroy (w)
Widget w;
{
TreeConstraints tc = TREE_CONSTRAINT(w);
TreeWidget tw = (TreeWidget) XtParent(w);
int i;
/*
* Remove the widget from its parent's sub-nodes list and
* make all this widget's sub-nodes sub-nodes of the parent.
*/
if (tw->tree.tree_root == w) {
if (tc->tree.n_children > 0)
tw->tree.tree_root = tc->tree.children[0];
else
tw->tree.tree_root = NULL;
}
delete_node (tc->tree.parent, (Widget) w);
for (i = 0; i< tc->tree.n_children; i++)
insert_node (tc->tree.parent, tc->tree.children[i]);
layout_tree ((TreeWidget) (w->core.parent), FALSE);
}
The useful TREE_CONSTRAINTS macro is defined as follows:
#define TREE_CONSTRAINT(w) ((TreeConstraints)((w)->core.constraints))
See AlsoXtDestroyWidget(1),
Constraint(3), Core(3).
Xt - Intrinsics Methods Constraint destroy()
I have a huge matrix file containing some 1.5 million rows and 6000 columns. The matrix looks something like this:
1 2 3
4 5 6
7 8 9
3 4 5
I want to add all the numbers in the columns of this matrix and display the result to my stdout. This means that the numbers in the first column are:
... (2 Replies)
Hi,
Just trying to get to grips with sed and awk for some reporting for work and I need some assistance:
I have a file that lists policy names on the first line and then on the second line whether the policy is active or not.
Policy Name: Policy1
Active: yes
Policy... (8 Replies)
version info :
vi availabe with RHEL 5.4
I have a text file with 10,000 lines. I want to copy lines from 5000th line to 7000th and redirect to a file. Any idea how I can do this?
Note:
The above scenario is just an example. In my actual requirement, the file has 14 million lines and I want... (9 Replies)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello,
I couldn't find an actual introduction thread, so I decided to just put this here.
I go by d0wngrade online. I have been programming in multiple languages for about 15+ years. I started with standard web design languages like HTML and CSS, but I then advanced from design to development... (2 Replies)
Hi guys...
The first active code line in AudioScope.sh is set -u .
This causes a complete exit if a variable is used/found but has not been allocated at the start of the program.
However, apart from writing code to do the task, is there a switch to to check which variables have been... (17 Replies)
Hi.
In thread https://www.unix.com/shell-programming-and-scripting/267833-grouping-counting.html rovf and I had a mini-discussion on grep and awk.
Here is a demo script that compares the awk and grep approaches for this single problem:
#!/usr/bin/env bash
# @(#) s2 Demonstrate group... (1 Reply)
Hello,
I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need,
# file with header names of required columns in required order
headers_file=$2
# read contents... (11 Replies)
For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this:
If you don't have gcc on your system:
0. Download and install the Command Line Tools for Xcode package from Sign In - Apple *
1. Download the dash... (2 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
I have data of an excel files as given below,
file1
org1_1 1 1 2.5 100
org1_2 1 2 5.5 98
org1_3 1 3 7.2 88
file2
org2_1 1 1 2.5 100
org2_2 1 2 5.5 56
org2_3 1 3 7.2 70
I have multiple excel files as above shown.
I have to copy column 1, column 4 and paste into a new excel file as... (26 Replies)
Dear All,
Taking a break from Vue.js coding for the site, SEO and YT videos; and hopefully addressing some well deserved criticism from some here that I have been too focused on the visual aspects of the forums versus the substance and the community....
While the "current generation... (9 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)