“Weather Widget” for Plasma 5 -based, Linux Computers

One of the observations which I’ve made about the practical use of Linux, is that in recent years and weeks, the number of weather widgets which we can use to decorate our desktops, and which provide some semblance of forecasting, has become more meager.

I suppose that one important reason may be the fact, that companies cannot extract revenues from operating servers, which simply respond to URL-requests, and which hand out weather information on that basis, for the client software to process as client wishes. Companies will only make profits these days, if they can force their clients to view advertisements.

And so recently I installed a widget, to my Debian / Stretch, Plasma 5 -based desktop computer named ‘Plato’, which is named ‘Weather Widget’, and which has the following display available:

screenshot_20180831_105340

This widget has as option to display information from ‘openweathermap.org‘, which has as intention to remain open and available.

There was a detail in how to get this widget running, that wasted some of my time yesterday, for which reason I’d like to share my experience with the reader. First of all, the preferred way to install this widget is, to right-click on the desktop, and then to left-click on “Add Widgets…”. If the desktop widgets are locked, the command must be given to unlock them first. Then, in the side-bar that appears, we click on “Get new Widgets” (at the very bottom), and then on “Download New Plasma Widgets”. In the window that appears, there’s a search field. In it, type ‘Weather’, and the widget in question should appear as available.

One great plus to adding widgets in this way, is the fact that we can do so, in user space, that is, without requiring root. However, here comes the catch: This widget will only display correctly, under Debian / Stretch, if the following two packages are installed:

  • ‘qml-module-qtgraphicaleffects’
  • ‘qml-module-qtquick-xmllistmodel’

Under other Plasma 5 -capable distributions, the same features may be provided by packages, which are named slightly differently.

Continue reading “Weather Widget” for Plasma 5 -based, Linux Computers

gImageReader

I just had some curiosity in practical OCR software, and installed a bunch of related packages on the laptop I name ‘Klystron’, including ‘tesseract-ocr-xxx‘ packages. This batch of installations went on to include ‘gImageReader‘, an actual GUI with which images can be read.

However, this revealed a cute little application that was Okay, I guess, but that would crash whenever I exited it. The solution to this problem was to custom-compile the latest version.

The package manager offers version 2.92 under Debian / Jessie. The available, custom-compiled version is 3.1.91. It is Qt 5 -based.

In order to compile that, I first needed to custom-compile Qt5-Spell, because that, too, is not good enough as things ship from the package manager. And eventually, when first trying to compile Qt5-Spell, in the required Qt5 mode (it will default to Qt4 mode), I also ran into this peculiar error message:

Qt5LinguistTools Not Found …

This actually requires that we install the package ‘qttools5-dev‘, which can be confusing, because there is also a package named ‘qttools5-dev-tools‘, which may already be installed to no avail.

But, now that I have surmounted these problems, I have a more serious application installed, and one that does not crash, just when exiting.

Dirk

Note: This application uses a hard-coded version of ‘tesseract‘, not the version which I installed from the package manager. Yet, I feel that having installed additional data files from the package manager, has also added languages which ‘gImageReader’ can read.

(Edit 06/05/2016 : ) It is also possible to install ‘gImageReader’, by adding the special repository to our sources list, which is being hosted by the application author, whose name is Mr. Sandromani.

$ sudo add-apt-repository ppa:sandromani/gimagereader
$ sudo apt-get update
$ sudo apt-get install gimagereader tesseract-ocr tesseract-ocr-eng

In this case, we are installing a binary from a 3rd party, and may also need to install the repository public key. This version uses the externally-supplied ‘tesseract‘ engine, but it is a customized version of ‘tesseract‘, which gImageReader is able to use. One point in installing the Debian version of ‘tesseract‘ could be, to have a version that is closer to what Google designed, and that can be invoked from the command-line, or from within other applications.