The Planetarium application shows where stars and planets can be seen in the sky from a chosen location and at a chosen time. To illustrate this, lets look at the Planetarium application that can be accessed via Manta Menu -> Navigation -> Planetarium. These shell scripts are stored under /usr/local/bin/ (see box “Application Wrapper Shell Scripts” in the figure above). This housekeeping is done by shell scripts (think Windows *.BAT files) that provide a “wrapper" around the actual application. For example, Navigatrix may update the applications configuration file with your latest GPS position (see ” GPS and Navigatrix”). When you call many of these applications via the Manta Menu, Navigatrix does a little additional housekeeping prior to actually launching the application executable file. usr/local/bin/ contains the executable file for the OpenCPN chartplotter (admittedly a bit of an odd placement, because this directory is mainly used to store wrapper shell scripts see below).It also contains the virtual “C: drive” that is used by Wine, the Windows emulator that enables you to run Windows programs under Unix (see “ Installing Windows Applications”). /opt/ contains a few additional programs like the zyGrib GRIB viewer and the Calibre library manager./usr/bin/ hosts most of the applications that are accessible via the Manta Menu, plus many subsidiary and utility programs.The figure below shows an overview of how the different bits and pieces interact in this context.Īpplications under Navigatrix are executable files (think DOS/Windows *.exe) that reside in three different directories (see box “Application Executable Files” in the figure above): Running and Configuring Applications under LXDEĪn important aspect of LXDE is how it provides access to the applications that come with Navigatrix (or others which you may install). ![]() widget style, icon theme) can be adjusted under Manta Menu -> Preferences -> Appearance Settings. ) you can use the Openbox configuration manager which is available under the Manta Menu -> Preferences -> Configuration Manager. To change the appearance and behavior of windows (colors, placement of controls, border sizes. The picture below shows an example of the overall Panel Preferences dialogue (right click on any section of the panel and chose Panel Settings). Note that the application icons in the Application Launch Bar are different from the Navigatrix-default because the screenshot was taken with a customized version of Navigatrix. The resulting dialogues should be largely self-explanatory. appearance, what short-cut icons to show in the application launch bar) by right-clicking on the corresponding element and then choosing the relevant "Settings" item. You can customize most elements of LXDE (e.g. In addition, it uses PCManFM as a light-weight file manager with a similar look and feel as the Windows file manager. It relies on Openbox (a subsidiary program) as a window manager which renders the windows and menus that applications need for their user interfaces. All of these will all look familiar to Windows users. LXDE is started when you boot Navigatrix and it provides the desktop interface, the panel at the bottom of the screen with menu (the manta symbol - equivalent to the Windows "Start" menu"), application launch bar, task bar (windows list), and a system tray. ![]() ![]() being spartan in its use of system resources). The desktop environment Navigatrix uses is called the LXDE (for “Light X11 Desktop Environment”, X11 being a “window standard” under unix) which is open source software designed specifically to be very light-weight (i.e. Naked Unix interacts with the user through a command line interface (think “DOS terminal window” in Windows) and Navigatrix runs what is called a "desktop environment" on top of the command line interface to provide a Windows-like user interface (tuned for simplicity, speed, and robustness which makes it look a bit different). The core of Navigatrix is a Unix flavor called Linux and among the available sub-flavors of Linux Navigatrix is based on Ubuntu. ![]() To do so, it helps to understand a little about how Navigatrix is set up and where its various components can be found. However, you may want to customize some of its features and/or to install additional software. One of Navigatrix strength is that it just works out of the box, without the need for constant updates and patches.
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