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"Old Style" Callbacks In QT4 (commandline tester)

Posted 12-12-2012 at 08:25 AM by rainbowsally

Tags c++, callback, compiling, computer mad science, qt4

What would be involved in creating a generic callback that we could control ourselves, rather than using QTs rather complicated system?

How about a windows style system with a windproc to handle messages?

QT's API is better than windows in that you can see how things are done, especially if you have the C++ sources. It's as visible as you can stand! ;-)

The Windows API is better than QT's only in one respect, and that is that the type safety is somewhat...

rainbowsally

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QT4 dialog & using MC2 EXT_ALL target examples

Posted 12-11-2012 at 12:45 AM by rainbowsally

Tags compiling, computer mad science, makefiles, mc2, qt4

The sources are in the qt4 demos and you can use the pro file if you like, but here's example of how to use the EXT_ALL target in an mc2.def.

This also applies to makefiles in general, but it's much easier to work through an intermediate system such as mc2.

It is also a great demo for using dialogs, and you can choose native or QT built-in styles for them, which makes a big difference for the file and color selection dialogs.

I particularly like the file...

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A stand-alone TextDisplay widget in QT

Posted 12-10-2012 at 02:47 PM by rainbowsally

Tags c++, computer mad science, make, mc2, qt4

A stand-alone TextDisplay widget in QT

Skip this part if you know about mc2 (makefile creator, the second generation)

--------------------
Before we start, if you haven't tried mc2 yet, don't be put off by the installation location. The Computer Mad Science Team uses 4 levels of installation for various kinds of apps.

The most basic type is the HOME/bin sandbox. This allows instantly running applications because that folder is usually in the...

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QT giac (qtgiac) and new lib lq/mc2 v. 3.03

Posted 06-05-2012 at 07:58 AM by rainbowsally
Updated 06-05-2012 at 08:05 AM by rainbowsally

Tags compiling, computer mad science, gui programming, qt4

[If you have had trouble compiling qtgiac, this might help.]

http://rainbowsally.net/pub/lq/qt-giac-rs.tar.gz (about 2 megs)

This qtgiac build currently works with the following version of libLQ/mc2 (and also with later builds of the mc2 v. 2x). If you need this to work for sure AND you want to mess with the makefiles, get this version of the libLQ/mc2 as well to make the job a little easier.

http://rainbowsally.net/pub/lq/libLQ...x-3.0.3.tar.gz...

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QT4 GUI Programming: Center Window

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

Tags compiling, computer mad science, gui programming, qt4

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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