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QT4 Interactive: qt4-info utility to list methods and properties

Posted 05-29-2012 at 09:31 AM by rainbowsally
Updated 06-01-2012 at 12:12 PM by rainbowsally (correction in error msg)

CHANGELOG: 6/1/2001
Corrected argv[<value>] in error msg at line 102 of file: src/qt4-info.cpp.

[If you work with qt4, this is well worth the exercise. You might be surprised at how much we do with so little code. -rs]

Care for a bit of Ye Olde Computer Mad Science? This one is kind of fun.

Todays Features:
  • Look up all QT4 classes and list properties or meta object method calls.

[This is part of the QT Interactive project, because...
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Old

QT4 GUI Programming: Center Window

Posted 05-28-2012 at 12:50 AM by rainbowsally

Today's Features:
  • Center a non-dialog window in qt4.

If you have mc2, 'mc2 -fetch qt4' for the Makefile, otherwise, do whatever you do to get this rolling.

Here are the files for this demo/test.

file: src/main.cpp
Code:
// generic C++ source template created by new.main

#include <stdio.h>  // printf(), FILE*, etc.
#include <malloc.h> // malloc(), free()
#include <string.h> // strcpy(), memcpy(), etc.
...
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Old

qt type id test/demo

Posted 05-27-2012 at 09:38 PM by rainbowsally
Updated 05-27-2012 at 09:40 PM by rainbowsally

Today's features:
  • Use C++ typeid's to compare or check types.
  • Share base64 encoded compressed file/dir data in message forums (example).

The typeid(obj) doesn't require QT, but it also works with it. Here's a simple makefile and a widget to show some type ids and how to compare
them.

After running this you should have a folder named typeid-test. Type 'make' inside that folder to create the 'main' executable.

Requires base64, QT4, make, gcc, and all that...
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Old

libLQ-qt-mc2 with qt4 support

Posted 05-27-2012 at 09:22 PM by rainbowsally
Updated 08-06-2014 at 07:06 AM by rainbowsally (new version)

[See note at the bottom IF you have a problem such as:
Code:
  libLQ-qt.so: undefined reference to `obj_copy_op(char**, char*, char*)'
  libLQ-qt.so: undefined reference to `obj_delete_op(char*, char*)'
which you probably won't.
]

This is libLQ with qt support and mc2 (the makefile creator, second generation).

update Sept 27, 2013
http://rainbowsally.org/rainbowsally...x-3.1.3.tar.gz

Uninstall, but...
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Old

Example: sig-handler funcs for C and C++ (throw-catch) PART 2

Posted 05-13-2012 at 11:37 PM by rainbowsally
Updated 05-14-2012 at 07:39 AM by rainbowsally (possible cpu hang if -O2 switch is used)

UPDATE:
Note: The signal-handler files can't be compiled with the -O2 switch and it's probably best if you only trap the signals you really intend to redirect, such as SIGSEGV (11). If you compile what we have here with the -O2 switch your cpu may hang if you try to exit using Ctrl-C for example. See implementation notes added to signal-handler.c below.

See part 1 for main functions to test this in C and C++.

To throw and catch stuff like segfaults in C++ it's...
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