This is the complete code for a Qt application I threw together in about ten minutes (called crosshair) which displays the current mouse coordinates in a window. You might be able to pull enough out of it to be useful. This is Qt 3.1, but Qt 4 is not a great deal different. You will need the Qt development libraries, not just the runtimes. The code comprises two files, crosshair.h and crosshair.cpp.
crosshair.h:
crosshair.cpp:
To build this, put both files in a directory called crosshair. cd to that directory and type
This does nothing more complex than inherit from a QLabel, set a timer to run 20x a second, grab the current cursor coordinates and write them into the label's text. Clicking in the window closes it. I use it for fixing up alignment bugs in JavaScript when I'm laying out objects.
You could open a file in the Crosshair class's constructor to store your data, and use gettimeofday(2) to get a timestamp. Nothing says Qt has to run in GUI mode (you can tell it explicitly not to in the QApplication constructor).
I want to get the screen width and cursor positions.
When I used curses, all the screen content was cleared.
So Can I use curses to get the screen size without clearing anything in the window?
Or is there any other alternative???
I can use only C or C++. (0 Replies)
Hi All,
In VI editor, to know the line number at any instant we use ctrl+g
Similarly, to know the current coulmn number what shall we use??
If not direct key controls like ctrl+g, Is there any comands that could be executed in colon or ex mode of VI to know the current column position???... (1 Reply)
hi all,
am trying to modify a ksh script to group server names together depending on the cluster they sit in. currently the script does a
find . -name '*.pid'
to find all running servers and prints out their pids and names.
current output looks something like this :
serverA ... (1 Reply)
I need to get the cursor position, and put it inside a variable. Problem is, i don't have the tput command, or ncurses.
Apparently I was supposed to try the following:
echo -e '\E
But I don't get a value or anything. Please help. (3 Replies)
Hi there.
It's easier to explain this with a pseudo code, I hope this makes sense:
var1=hello
echo $var1
some kind of loop
echo loop counter
done
How do I hold the cursor position immediately behind the last output so I'd get something like:
hello123456789
DOS used to use ","... (5 Replies)
I have a slight problem controlling the cursor position in a Bash terminal window. I have a function ask a question and then wait for an answer which is either 'y' or 'n' or a carriage return. Whenever the user enters anything else it just erases the answer and waits for the next one. However, the... (23 Replies)
Discussion started by: Ralph
23 Replies
LEARN ABOUT DEBIAN
crosshair
crosshair(3tk) Crosshairs crosshair(3tk)__________________________________________________________________________________________________________________________________________________NAME
crosshair - Crosshairs for Tk canvas
SYNOPSIS
package require Tcl ?8.4?
package require Tk ?8.4?
package require crosshair ?1.0.2?
crosshair::crosshair w ?arg...?
crosshair::off w
crosshair::configure w ?arg...?
crosshair::track on w cmdprefix
crosshair::track off w
_________________________________________________________________DESCRIPTION
The crosshair package provides commands to (de)activate and track crosshairs on canvas widgets.
API
The following commands are exported to the public:
crosshair::crosshair w ?arg...?
This command activates the display of a pair of cross-hairs for the canvas widget w. The cross-hairs track the pointing device. The
result of the command is the empty string.
All arguments after the widget w are treated as options as for a canvas line item in w. Of particular interest are -fill and -dash.
crosshair::off w
This command removes the cross-hairs from the canvas widget w. Nothing is done if the widget had no cross-hairs. The result of the
command is the empty string.
crosshair::configure w ?arg...?
This command changes the appearance of the cross-hairs in the canvas widget w. It is an error to call it for a canvas which has no
cross-hairs.
All arguments after the widget w are treated as options as for a canvas line item in w. Of particular interest are -fill and -dash.
The result of the command are the current configuration settings.
crosshair::track on w cmdprefix
This command activates reporting of the location of the cross-hairs in the canvas widget w. It is an error to use this command for a
canvas which has no cross-hairs. The result of the command is the empty string.
After the invokation of this command the specified command prefix cmdprefix will be called whenever the mouse moves within the can-
vas, with 7 arguments. These are, in order:
[1] The widget w
[2] The x-location of the cross-hairs, in pixels.
[3] The y-location of the cross-hairs, in pixels.
[4] The x-location of the top-left corner of the viewport, in pixels.
[5] The y-location of the top-left corner of the viewport, in pixels.
[6] The x-location of the bottom-right corner of the viewport, in pixels.
[7] The y-location of the bottom-right corner of the viewport, in pixels.
A previously existing callback for w will be disabled. I.e. per canvas widget with cross-hairs only one callback reporting their
location is possible.
crosshair::track off w
This command disables the reporting of the location of the cross-hairs in the canvas widget w. It is an error to use this command
for a canvas which has no cross-hairs. The result of the command is the empty string.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category tklib ::
crosshair of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you
may have for either package and/or documentation.
KEYWORDS
canvas, cross-hairs, location, tracking, viewport
COPYRIGHT
Copyright (c) 2003 Kevin Kenny
Copyright (c) 2008 (docs) Andreas Kupries <andreas_kupries@users.sourceforge.net>
crosshair 1.0.2 crosshair(3tk)