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/*
* Stellarium
* Copyright (C) 2012 Anton Samoylov
* Copyright (C) 2012 Bogdan Marinov
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*/
#include <QDebug>
#include <QKeyEvent>
#include "ShortcutLineEdit.hpp"
ShortcutLineEdit::ShortcutLineEdit(QWidget *parent) :
QLineEdit(parent)
{
// call clear for setting up private fields
clear();
}
QKeySequence ShortcutLineEdit::getKeySequence()
{
return QKeySequence(keys.value(0, 0), keys.value(1, 0),
keys.value(2, 0), keys.value(3, 0));
}
bool ShortcutLineEdit::isEmpty() const
{
return (keys.isEmpty());
}
void ShortcutLineEdit::clear()
{
keys.clear();
QLineEdit::clear();
emit contentsChanged();
}
void ShortcutLineEdit::backspace()
{
if (keys.isEmpty())
return;
keys.removeLast();
setContents(getKeySequence());
}
void ShortcutLineEdit::setContents(QKeySequence ks)
{
// Avoiding infinite loop of same signal-slot emitting/calling
if (ks.toString(QKeySequence::NativeText) == text())
return;
// Set the keys from the given key sequence
clear();
for (int i = 0; i < ks.count(); ++i)
{
keys.append(ks[i]);
}
// Show Ctrl button as Cmd on Mac
setText(ks.toString(QKeySequence::NativeText));
emit contentsChanged();
}
void ShortcutLineEdit::keyPressEvent(QKeyEvent *e)
{
int nextKey = e->key();
if ( keys.count() > 3 || // too long shortcut
nextKey == Qt::Key_Control || // dont count modifier keys
nextKey == Qt::Key_Shift ||
nextKey == Qt::Key_Meta ||
nextKey == Qt::Key_Alt )
return;
// applying current modifiers to key
nextKey |= getModifiers(e->modifiers(), e->text());
// If there is selected text, replace *all* instead of appending.
if (hasSelectedText())
{
keys.clear();
}
keys.append(nextKey);
// set displaying information
setText(getKeySequence().toString(QKeySequence::NativeText));
emit contentsChanged();
// not call QLineEdit's event because we already changed contents
e->accept();
}
void ShortcutLineEdit::focusInEvent(QFocusEvent *e)
{
// Select the contents so that they are replaced on the next edit
selectAll();
emit focusChanged(false);
QLineEdit::focusInEvent(e);
}
void ShortcutLineEdit::focusOutEvent(QFocusEvent *e)
{
emit focusChanged(true);
QLineEdit::focusOutEvent(e);
}
int ShortcutLineEdit::getModifiers(Qt::KeyboardModifiers state, const QString &text)
{
int result = 0;
// The shift modifier only counts when it is not used to type a symbol
// that is only reachable using the shift key anyway
if ((state & Qt::ShiftModifier) && (text.size() == 0
|| !text.at(0).isPrint()
|| text.at(0).isLetterOrNumber()
|| text.at(0).isSpace()))
result |= Qt::SHIFT;
if (state & Qt::ControlModifier)
result |= Qt::CTRL;
// META key is the same as WIN key on non-MACs
if (state & Qt::MetaModifier)
result |= Qt::META;
if (state & Qt::AltModifier)
result |= Qt::ALT;
return result;
}
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