MuseScore/mscore/shortcutcapturedialog.cpp

//=============================================================================
//  MusE Score
//  Linux Music Score Editor
//  $Id: shortcutcapturedialog.cpp 5537 2012-04-16 07:55:10Z wschweer $
//
//  Copyright (C) 2002-2007 Werner Schweer and others
//  Copyright (C) 2003 Mathias Lundgren (lunar_shuttle@users.sourceforge.net)
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2.
//
//  This program 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 this program; if not, write to the Free Software
//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================

#include "shortcutcapturedialog.h"
#include "musescore.h"
#include "shortcut.h"

//---------------------------------------------------------
//   ShortcutCaptureDialog
//---------------------------------------------------------

ShortcutCaptureDialog::ShortcutCaptureDialog(Shortcut* _s, QMap<QString, Shortcut*> ls, QWidget* parent)
   : QDialog(parent)
      {
      setupUi(this);
      setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
      localShortcuts = ls;
      s = _s;

      addButton->setEnabled(false);
      replaceButton->setEnabled(false);
      oshrtLabel->setText(s->keysToString());
      connect(clearButton, SIGNAL(clicked()), SLOT(clearClicked()));
      connect(addButton, SIGNAL(clicked()), SLOT(addClicked()));
      connect(replaceButton, SIGNAL(clicked()), SLOT(replaceClicked()));
      clearClicked();
      grabKeyboard();

      oshrtLabel->installEventFilter(this);
      nshrtLabel->installEventFilter(this);
      }


//---------------------------------------------------------
//   addClicked
//---------------------------------------------------------

void ShortcutCaptureDialog::addClicked()
      {
      done(1);
      }

//---------------------------------------------------------
//   replaceClicked
//---------------------------------------------------------

void ShortcutCaptureDialog::replaceClicked()
      {
      done(2);
      }

//---------------------------------------------------------
//   ShortcutCaptureDialog
//---------------------------------------------------------

ShortcutCaptureDialog::~ShortcutCaptureDialog()
      {
      nshrtLabel->removeEventFilter(this);
      oshrtLabel->removeEventFilter(this);
      releaseKeyboard();
      }

//---------------------------------------------------------
//   eventFilter
//---------------------------------------------------------

bool ShortcutCaptureDialog::eventFilter(QObject* o, QEvent* e)
    {
    // Mac only, harmless on Win
    // Grab the backspace key before one of the QLineEdit widgets gets them.
    // Otherwise Qt on mac swallows the Backspace even if the field is read-only.
    if (e->type() == QEvent::KeyPress && static_cast<QKeyEvent*>(e)->key() == Qt::Key_Backspace) {
        keyPressEvent(static_cast<QKeyEvent*>(e));
        return true;
        }
    return false;
    }


//---------------------------------------------------------
//   keyPressEvent
//---------------------------------------------------------

void ShortcutCaptureDialog::keyPressEvent(QKeyEvent* e)
      {
      if (key.count() >= 4)
            return;
      int k = e->key();
      if (k == 0 || k == Qt::Key_Shift || k == Qt::Key_Control ||
         k == Qt::Key_Meta || k == Qt::Key_Alt || k == Qt::Key_AltGr
         || k == Qt::Key_CapsLock || k == Qt::Key_NumLock
         || k == Qt::Key_ScrollLock || k == Qt::Key_unknown)
            return;

      k += e->modifiers();
      switch(key.count()) {
            case 0: key = QKeySequence(k); break;
            case 1: key = QKeySequence(key[0], k); break;
            case 2: key = QKeySequence(key[0], key[1], k); break;
            case 3: key = QKeySequence(key[0], key[1], key[2], k); break;
            default:
                  qDebug("internal error: bad key count\n");
                  break;
            }

      // Check against conflicting shortcuts
      bool conflict = false;
      QString msgString;

      foreach (Shortcut* ss, localShortcuts) {
            if (s == ss)
                  continue;
            if (! (s->state() & ss->state()))    // no conflict if states do not overlap
                  continue;
            foreach(const QKeySequence& ks, ss->keys()) {
                  if (ks == key) {
                        msgString = tr("Shortcut conflicts with ") + ss->descr();
                        conflict = true;
                        break;
                        }
                  }
            if (conflict)
                  break;
            }
      messageLabel->setText(msgString);
      addButton->setEnabled(conflict == false);
      replaceButton->setEnabled(conflict == false);
      nshrtLabel->setText(key.toString(QKeySequence::NativeText));

      QString A = key.toString(QKeySequence::NativeText);
      QString B = key.toString(QKeySequence::PortableText);
qDebug("capture key 0x%x  modifiers 0x%x virt 0x%x scan 0x%x <%s><%s>\n",
      k,
      int(e->modifiers()),
      int(e->nativeVirtualKey()),
      int(e->nativeScanCode()),
      qPrintable(A),
      qPrintable(B)
      );
      }

//---------------------------------------------------------
//   clearClicked
//---------------------------------------------------------

void ShortcutCaptureDialog::clearClicked()
      {
      nshrtLabel->setText(tr("Undefined"));
      key = 0;
      }