Category Archives: English Posts

Posts in English

Installing Octave Packages on Windows

Octave is a quite good MATLAB® clone. Although its feature list is smaller. In particular Octave’s Toolboxes extend Matlab tremedously.

But Octave offers extensions also – the packages. The Installation of Packages under GNU/Linux and Mac OS X via their package managers (@Mac via MacPorts or Homebrew) are easy. Due to the fact that precompiled packages are not available onWindows and some packages need to be compiled with an C compiler the installation in Windows is often a problem without a installed C-Toolchain.

This how-to describes how to install a compatible C-toolchain, setup the needed environment variables correctly and how to install packages easily.

Continue reading Installing Octave Packages on Windows

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Java-Update simple and automatic

For security reasons a lot of professional users work with standard user privileges. Nevertheless installations, updates, etc can be done by the administrator entering the administrator password without log out and log in as an dedicated administrator. There is one exception: Java.

Continue reading Java-Update simple and automatic

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Other spell-checking language in MdCharm

To add another language in the spell checker of the markdown editor MdCharm in Windows or GNU/Linux, download the desired  dictionary (*.oxt) of OpenOffice. Unzip it with e.g. 7-Zip (Windows) or e.g. Roller (GNU/Linux) and copy the aff– and dict-files to the folder “spellcheckdict” of the MdCharm installation.

Java’s Swing GTK LaF nice and pretty on Ubuntu

In Ubuntu Java apps which use Swing’s GTK Look and Feel (LaF) do not appear as native applications.

The menus does not have borders and do not appear as app menus on the top of the screen nor provide HUD support. The fonts on buttons and dialog boxes are thinner and do not match to the native look and feel.

This how-to describes step by step how you improve the GTK LaF of Java’s Swing apps. Continue reading Java’s Swing GTK LaF nice and pretty on Ubuntu

Display Java’s Swing menus correctly in Linux Mint’s GTK LaF

Since GTK 3 has been introduced Java Swing applications have a bug in displaying their menus when using the GTK Look and Feel (LaF).

At Linux Mint Cinnamon:

  • No border around dropdown and context menus
  • Wrong font color of activated checkbox and radiobutton menu items (the font has the same color as the background and appears unvisible)
  • No menu separators

In the web there are some fixes and workarounds but just one solves the problem on Linux Mint 17 completely (see section “Interesting Links” below).

This How-To shows how to fix the problem and offers a bash script to get rid of this problem on Mint 17.x automatically.

For Ubuntu find a small hint below.

Continue reading Display Java’s Swing menus correctly in Linux Mint’s GTK LaF

EXE-files accidentally associated with an application

It is nearly impossible to associate a Windows EXE file to a normal application. The context command “Open with …” is not available for this file type.

But broken EXE-files or wrong commands in desktop shortcuts can ask for a application to start with. When your fingers are faster than your brain you cannot start EXE files anymore because Windows try to open them with the application selected before.

Unfortunately you cannot start any repair tools or even the registry editor to fix the problem manually now.

This how-to describes in a few steps how to bring your computer back working correctly.

Continue reading EXE-files accidentally associated with an application

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Delete Parallels icons from Launchpad

If you activated the wrong  option in your Parallels settings your Launchpad is flooded with icons of your virtual machine.

In general you do not like it. Removing the icons is not that easy and not self-explanatory unfortunately. Trying to delete the icons in the Launchpad fails. Furthermore you will not find the app icons in the global Application folder of the Finder.

But there is a possibility to get rid of the unwanted icons, described below. Continue reading Delete Parallels icons from Launchpad