Clementine-audio-player-Mac-Linux-Windows/src/ui/globalshortcutgrabber.cpp

/* This file is part of Clementine.
   Copyright 2010, David Sansome <me@davidsansome.com>

   Clementine is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Clementine is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "globalshortcutgrabber.h"
#include "ui_globalshortcutgrabber.h"

#include <QtDebug>
#include <QKeyEvent>

GlobalShortcutGrabber::GlobalShortcutGrabber(QWidget *parent)
  : QDialog(parent),
    ui_(new Ui::GlobalShortcutGrabber)
{
  ui_->setupUi(this);

  modifier_keys_ << Qt::Key_Shift << Qt::Key_Control << Qt::Key_Meta
                 << Qt::Key_Alt << Qt::Key_AltGr;
}

GlobalShortcutGrabber::~GlobalShortcutGrabber() {
  delete ui_;
}

QKeySequence GlobalShortcutGrabber::GetKey(const QString &name) {
  ui_->label->setText(tr("Press a key combination to use for %1...").arg(name));
  ui_->combo->clear();

  ret_ = QKeySequence();

  if (exec() == QDialog::Rejected)
    return QKeySequence();
  return ret_;
}

void GlobalShortcutGrabber::showEvent(QShowEvent* e) {
  grabKeyboard();
  QDialog::showEvent(e);
}

void GlobalShortcutGrabber::hideEvent(QHideEvent* e) {
  releaseKeyboard();
  QDialog::hideEvent(e);
}

void GlobalShortcutGrabber::grabKeyboard() {
#ifdef Q_OS_DARWIN
  SetupMacEventHandler();
#endif
  QDialog::grabKeyboard();
}

void GlobalShortcutGrabber::releaseKeyboard() {
#ifdef Q_OS_DARWIN
  TeardownMacEventHandler();
#endif
  QDialog::releaseKeyboard();
}

bool GlobalShortcutGrabber::event(QEvent* e) {
  if (e->type() == QEvent::ShortcutOverride) {
    QKeyEvent* ke = static_cast<QKeyEvent*>(e);

    if (modifier_keys_.contains(ke->key()))
      ret_ = QKeySequence(ke->modifiers());
    else
      ret_ = QKeySequence(ke->modifiers() | ke->key());

    UpdateText();

    if (!modifier_keys_.contains(ke->key()))
      accept();
    return true;
  }
  return QDialog::event(e);
}

void GlobalShortcutGrabber::UpdateText() {
  ui_->combo->setText("<b>" + ret_.toString(QKeySequence::NativeText) + "</b>");
}