systemwide hotkey

[Screeze]

Hi,
I'm trying to use a systemwide hotkey, to open some windows from an application, running in background.

I read that Qt doesn't support this systemwide hotkeys itself, so I tried doing something with registerhotkey. What i tried is:

In the constructor of a dialog form, i put

RegisterHotKey(winId(), 100, MOD_CONTROL, VK_SPACE);

RegisterHotKey(winId(), 100, MOD_CONTROL, VK_SPACE);

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And i used this function, just for testing if any event gets reported to my app

bool winEvent(MSG * m)
{
    QApplication::quit();
    return false;
}

bool winEvent(MSG * m)
{
    QApplication::quit();
    return false;
}

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But it seems that there is never reported an event.

Where's my mistake? Maybe I understood sth. Wrong, how does this work?

Thanks.

[Screeze]

does anyone has an idea? i was looking for a solution for >5 hours now... can't find anything....

[jpn]

See QxtGlobalShortcut.

[Screeze]

well, thanks, i was playing around with that for the last 4 hours, but i don't get it to work...

Maybe you could tell me whats wrong with this:

main.cpp

#include "mainwindow.h"
#include <QxtApplication>
 
int main(int argc, char *argv[])
{
    QxtApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

#include "mainwindow.h"
#include <QxtApplication>

int main(int argc, char *argv[])
{
    QxtApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

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mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QtGui/QMainWindow>
#include <QxtApplication>
#include <QxtGlobalShortcut>
 
namespace Ui
{
    class MainWindow;
}
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
    QxtGlobalShortcut *m_action;
 
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
public slots:
    void jump();
private:
    Ui::MainWindow *ui;
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>
#include <QxtApplication>
#include <QxtGlobalShortcut>

namespace Ui
{
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT
    QxtGlobalShortcut *m_action;

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

public slots:
    void jump();
private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

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and mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QxtApplication>
#include <QxtGlobalShortcut>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow), m_action(new QxtGlobalShortcut(QKeySequence("Ctrl+Alt+A")))
{
    ui->setupUi(this);
    connect(m_action, SIGNAL(activated()), this, SLOT(jump()));
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::jump()
{
    qDebug() << "Jump!";
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QxtApplication>
#include <QxtGlobalShortcut>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow), m_action(new QxtGlobalShortcut(QKeySequence("Ctrl+Alt+A")))
{
    ui->setupUi(this);
    connect(m_action, SIGNAL(activated()), this, SLOT(jump()));
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::jump()
{
    qDebug() << "Jump!";
}

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The Problem is:
When i start the program (compiling works fine), the application closes, and windows tells me something like "....exe isn't working anymore..." [sorry, i don't know the exakt message in english, that's the translation of the german message]

Doe's anyone know what I did wrong?

(I'm using QtCreator..)

[jpn]

This could be caused by the famous release vs. debug mix on Windows. Make sure you compile your app in the same mode as Qxt was built.

[Screeze]

no, thats not the problem.
I first build Qxt wrong, but at this time i couldn't even compile the project. After that i compiled it for debug mode, and my project also runs in debug mode. (i also tried release mode, but doesn't help)

Any other ideas?

[Screeze]

I'm still interestet in an solution for this. If it doesn't work like this, i'd also be glad for another possibility to do this. (It only has to work in windows!)

[jpn]

Have you tried rebuilding both Qxt and your application from clean, making sure both are built in the same mode? I'd still claim that's the problem. I've seen that problem sooo many times.

[Screeze]

yes i did, but it didn't help

[jpn]

Then I guess you have to use a debugger to see where it goes wrong. Preferably attach a minimal compilable test case that reproduces the problem and the corresponding backtrace from a debugger.

PS. Does the QxtGui test application work for you? It's in tests/other/app.