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Full Discussion: read position mouse cursor
Special Forums UNIX and Linux Applications read position mouse cursor Post 302254556 by daggilli on Tuesday 4th of November 2008 05:27:59 PM
Old 11-04-2008
Java
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:

Code:
#ifndef CROSSHAIR_H
#define CROSSHAIR_H
#include <qwidget.h>
#include <qstring.h>
#include <qlabel.h>
#include <qevent.h>

class Crosshair : public QLabel
{
Q_OBJECT

public:
    Crosshair(QWidget *parent=0);

protected:
    void mousePressEvent(QMouseEvent *);

private:
    QTimer         *timer;

private slots:
    void timerfire();
};

#endif

crosshair.cpp:

Code:
#include <qapplication.h>
#include <qpushbutton.h>
#include <qtimer.h>
#include <qcursor.h>
#include <iostream>
#include "crosshair.h"

using namespace std;

int main(int argc,char **argv)
{
    QApplication a(argc,argv);

    Crosshair mousepos;

    a.setMainWidget(&mousepos);
    mousepos.show();
    return a.exec();
}

Crosshair::Crosshair(QWidget *parent) : QLabel(parent)
{
    setIndent(20);
    resize(100,30);
    move(1200,200);
    setText("0,0");
    timer=new QTimer(this);
    connect(timer,SIGNAL(timeout()),this,SLOT(timerfire()));
    timer->start(50,false);
}

void Crosshair::mousePressEvent(QMouseEvent *)
{
    qApp->quit();
}

void Crosshair::timerfire()
{
    QPoint p=QCursor::pos();
    this->setText(QString().sprintf("%d,%d",p.x(),p.y()));
}

To build this, put both files in a directory called crosshair. cd to that directory and type
Code:
qmake -project
qmake
make

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).

Qt from Trolltech: http://doc.trolltech.com
 

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LEARN ABOUT SUSE

exmouse

exmouse(3alleg4)                                                  Allegro manual                                                  exmouse(3alleg4)

NAME

       exmouse - Getting input from the mouse. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       Example exmouse

DESCRIPTION

       This  program  demonstrates  how  to  get mouse input. The first part of the test retrieves the raw mouse input data and displays it on the
       screen without using any mouse cursor. When you press a key the standard arrow-like mouse cursor appears.  You are not restricted  to  this
       shape,  and a second key press modifies the cursor to be several concentric colored circles. They are not joined together, so you can still
       see bits of what's behind when you move the cursor over the printed text message.

SEE ALSO

       BITMAP(3alleg4),  END_OF_MAIN(3alleg4),  SCREEN_H(3alleg4),  SCREEN_W(3alleg4),  acquire_screen(3alleg4),   allegro_error(3alleg4),   alle-
       gro_init(3alleg4),  allegro_message(3alleg4),  bitmap_mask_color(3alleg4), circle(3alleg4), clear_keybuf(3alleg4), clear_to_color(3alleg4),
       create_bitmap(3alleg4),  desktop_palette(3alleg4),   destroy_bitmap(3alleg4),   font(3alleg4),   get_mouse_mickeys(3alleg4),   install_key-
       board(3alleg4),  install_mouse(3alleg4),  install_timer(3alleg4),  key(3alleg4),  keypressed(3alleg4),  makecol(3alleg4), mouse_b(3alleg4),
       mouse_w(3alleg4), mouse_x(3alleg4),  mouse_y(3alleg4),  mouse_z(3alleg4),  palette_color(3alleg4),  poll_mouse(3alleg4),  readkey(3alleg4),
       release_screen(3alleg4),   screen(3alleg4),  set_gfx_mode(3alleg4),  set_mouse_sprite(3alleg4),  set_mouse_sprite_focus(3alleg4),  set_pal-
       ette(3alleg4), show_mouse(3alleg4), textout_centre_ex(3alleg4), textout_ex(3alleg4), textprintf_centre_ex(3alleg4), textprintf_ex(3alleg4),
       textprintf_right_ex(3alleg4), vsync(3alleg4)

Allegro                                                            version 4.4.2                                                  exmouse(3alleg4)
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