New Qt project: qbar

Hello there! I’m still looking for an elegant window manager for developers under GNU/Linux. I think that mcwm is one of the nearest to my concept of design. No window borders, small RAM resources, XCB based.

When I downloaded mcwm project I noticed the TODO file containing an interesting feature request: snap borders. So in a couple of day I produced a patch and submitted to the author.  Unfortunately the author’s git repository doesn’t have a web interface, so, if you’re curious, you can see the patch as follows:

$ git clone git://
$ cd mcwm
$ git diff 864bc76d d20afb19

Well, now that the patch is merged, It’s time to develop a general purpose toolbar. A toolbar to display values, a toolbar to perform actions, a toolbar to rule them all! 🙂

And…in a couple of days I developed qbar that uses stdin streaming to fill itself with objects like: buttons, labels, menu, progress bar. And who knows about the future? You can write you “applet” in standard bash script and redirect the stdout to qbar through a pipe. As you can imagine there is a protocol for the arguments given in the stdin. The protocol is the following:






<refresh> can be S (static) or R (refresh)
<size_mode> can be E (expanding) or F (fixed)

qbar is developed in Qt (4.8), so you can use a simple CSS stylesheet to develop a new theme. Let me show you how:

QMainWindow {
	background: #333333;
	color: #fff;

QLabel {
	color: #fff;

QMenu {
	background: #333333;
	color: #fff;

QPushButton {
	border-radius: 10px;
	padding-left: 5px;
	padding-right: 5px;
	color: #fff;

QPushButton:hover, QMenu::item:selected{
	background: #666;

#ITEM_2 {
	width: 150px;

QProgressBar {
     border: 2px solid rgba(0,0,0,0);
     border-radius: 5px;
     text-align: center;
     background-color: #666;
     color: #fff;

 QProgressBar::chunk {
     background-color: #05B8CC;

As you can see from the code, you can refer to the n-th element using the CSS selector <#ITEM_> followed by the element id. And, you can use the following command line parameters:

qbar [-a <l|c|r>] [-p <t|b>] [-t] [-h <pixels>] [-stylesheet <file>]

-a alignment
   l = left
   c = center
   r = right
-p position
   t = top
   b = bottom
-t set transparent background
-h height in pixels
-stylesheet css file

qbar is published at Gitorious:


and at What’s missing? Ah…yes, screenshot!


If you liked it, please vote for it on, and if you want please submit patches and feature requests, all the code is released under the terms of GNU/GPL.



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