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Mouse event propagation

Published Saturday May 27th, 2006 | 2 Comments on Mouse event propagation
Posted in Qt, Qtopia

Have you ever implemented mouse handling in a Qt widget? Either in a custom widget, (that inherits QWidget directly,) or by extending some existing widget, let’s say QLabel, with interaction abilities? For the most simple cases, mouse handling is quite intuitive in Qt: just reimplement a mouse handler function (virtual function, inherited from QWidget), and […]

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it’s spelled ‘Qtopia’

Published Wednesday May 24th, 2006 | Comments Off on it’s spelled ‘Qtopia’
Posted in Qt, Qtopia

ok, have to rant here. I have worked with Qtopia and friends for several years now, and occasionally see ‘Qtopia’ spelled as “QTopia’. and for some reason, it bothers me seeing this (perhaps pedanticness?). Please, if you write about ‘Qtopia’, spell it as Q-t-o-p-i-a, there is no capital ‘T’. and if you have written it […]

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Qt 4.1.3 released

Published Friday May 19th, 2006 | 2 Comments on Qt 4.1.3 released
Posted in Qt

Qt 4.1.3 was released to the public today. A lot of work went into this release, and I’m happy that it’s out in the wild now. I was monitoring the incoming bugreports during the day and nearly fainted when reading about a binary compatibility breakage. We have some extensive test-suites to make sure we don’t […]

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cmake in KDE

Published Sunday May 14th, 2006 | 4 Comments on cmake in KDE
Posted in KDE

Lorn, it’s pretty simple: KDE needs a build system that supports flexible configure checks since it uses a lot of 3rdparty libraries. An easy and portable way of finding if a library is installed in the propery version on a system, if a header provides the correct prototype of a function, if a compiler supports […]

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whats the buzz on cmake

Published Sunday May 14th, 2006 | 2 Comments on whats the buzz on cmake
Posted in KDE, Qt, Qtopia

There’s a new build tool around these days – cmake. Kde4 supposedly uses it, replacing the autotools configuration stuff. Now I can understand why someone would want to not use autotools – too complicated for many engineers to understand properly, and IMHO a pain in the a**. Trolltech has a great tool already – qmake. […]

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Fast transformed pixmap/image drawing

Published Saturday May 13th, 2006 | 1 Comment on Fast transformed pixmap/image drawing
Posted in KDE, Qt, Qtopia

From time to time I hear about one particular annoyance people have with Qt’s painting architecture – that drawing transformed pixmaps is horribly slow. Scaled pixmap drawing, for example; something like this: We all know the use case: some image editor that needs to zoom in on an image to plot pixels, or perhaps someone […]

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Fun with QTextEdit

Published Wednesday May 10th, 2006 | Comments Off on Fun with QTextEdit
Posted in Qt

One of the features that I like in a programming editor is the ability to have multiple views of the same file. It’s a little known fact that this is very easy to accomplish with QTextEdit. Try out this snippet of code: #include <QtGui> int main(int argc, char **argv) { QApplication app(argc, argv); QTextDocument sharedDocument; […]

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on the lessor gpl

Published Sunday April 30th, 2006 | 4 Comments on on the lessor gpl
Posted in KDE, Qt, Qtopia

Personally speaking, and being a developer of free software, I want my free software to always remain free, which is why I choose and develop my software using the GPL. Even RMS doesn’t like the LGPL, which is why its name was changed to the Lessor GPL. http://www.gnu.org/licenses/why-not-lgpl.html Speaking in strictly free software terms… using […]

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