savedaction.cpp 11.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437
/**
 ******************************************************************************
 *
 * @file       savedaction.cpp
 * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
 *             Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
 * @brief      
 * @see        The GNU Public License (GPL) Version 3
 * @defgroup   
 * @{
 * 
 *****************************************************************************/
/* 
 * 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 3 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., 
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <utils/savedaction.h>

#include <utils/qtcassert.h>
#include <utils/pathchooser.h>

#include <QtCore/QDebug>
#include <QtCore/QSettings>

#include <QtGui/QAbstractButton>
#include <QtGui/QAction>
#include <QtGui/QActionGroup>
#include <QtGui/QCheckBox>
#include <QtGui/QLineEdit>
#include <QtGui/QRadioButton>
#include <QtGui/QSpinBox>


using namespace Utils;


//////////////////////////////////////////////////////////////////////////
//
// SavedAction
//
//////////////////////////////////////////////////////////////////////////

/*!
    \class Utils::SavedAction
    
    \brief The SavedAction class is a helper class for actions with persistent
    state.

    \ingroup utils

*/

SavedAction::SavedAction(QObject *parent)
  : QAction(parent)
{
    m_widget = 0;
    connect(this, SIGNAL(triggered(bool)), this, SLOT(actionTriggered(bool)));
}


/*!
    Returns the current value of the object.

    \sa setValue()
*/
QVariant SavedAction::value() const
{
    return m_value;
}


/*!
    Sets the current value of the object. If the value changed and
    \a doemit is true, the \c valueChanged() signal will be emitted.

    \sa value()
*/
void SavedAction::setValue(const QVariant &value, bool doemit)
{
    if (value == m_value)
        return;
    m_value = value;
    if (this->isCheckable())
        this->setChecked(m_value.toBool());
    if (doemit)
        emit valueChanged(m_value);
}


/*!
    Returns the default value to be used when the item does not exist yet
    in the settings.

    \sa setDefaultValue()
*/
QVariant SavedAction::defaultValue() const
{
    return m_defaultValue;
}


/*!
    Sets the default value to be used when the item does not exist yet
    in the settings.

    \sa defaultValue()
*/
void SavedAction::setDefaultValue(const QVariant &value)
{
    m_defaultValue = value;
}


/*!
    Returns the key to be used when accessing the settings.

    \sa settingsKey()
*/
QString SavedAction::settingsKey() const
{
    return m_settingsKey;
}


/*!
    Sets the key to be used when accessing the settings.

    \sa settingsKey()
*/
void SavedAction::setSettingsKey(const QString &key)
{
    m_settingsKey = key;
}


/*!
    Sets the key and group to be used when accessing the settings.

    \sa settingsKey()
*/
void SavedAction::setSettingsKey(const QString &group, const QString &key)
{
    m_settingsKey = key;
    m_settingsGroup = group;
}


/*!
    Sets the key to be used when accessing the settings.

    \sa settingsKey()
*/
QString SavedAction::settingsGroup() const
{
    return m_settingsGroup;
}

/*!
    Sets the group to be used when accessing the settings.

    \sa settingsGroup()
*/
void SavedAction::setSettingsGroup(const QString &group)
{
    m_settingsGroup = group;
}

QString SavedAction::textPattern() const
{
    return m_textPattern;
}

void SavedAction::setTextPattern(const QString &value)
{
    m_textPattern = value;
}

QString SavedAction::toString() const
{
    return QLatin1String("value: ") + m_value.toString()
        + QLatin1String("  defaultvalue: ") + m_defaultValue.toString()
        + QLatin1String("  settingskey: ") + m_settingsGroup
        + '/' + m_settingsKey;
}

/*!
    \fn QAction *SavedAction::updatedAction(const QString &text)

    Adjust the \c text() of the underlying action.

    This can be used to update the item shortly before e.g. a menu is shown.

    If the item's \c textPattern() is empty the \a text will be used
    verbatim.

    Otherwise, the behaviour depends on \a text: if it is non-empty,
    \c QString(textPattern()).arg(text), otherwise, \c textPattern()
    with the "%1" placeholder removed will be used.

    \sa textPattern(), setTextPattern()
*/
QAction *SavedAction::updatedAction(const QString &text0)
{
    QString text = text0;
    bool enabled = true;
    if (!m_textPattern.isEmpty()) {
        if (text.isEmpty()) {
            text = m_textPattern;
            text.remove("\"%1\"");
            text.remove("%1");
            enabled = false;
        } else {
            text = m_textPattern.arg(text0);
        }
    }
    this->setEnabled(enabled);
    this->setData(text0);
    this->setText(text);
    return this;
}

/*
    Uses \c settingsGroup() and \c settingsKey() to restore the 
    item from \a settings,

    \sa settingsKey(), settingsGroup(), writeSettings()
*/
void SavedAction::readSettings(QSettings *settings)
{
    if (m_settingsGroup.isEmpty() || m_settingsKey.isEmpty())
        return;
    settings->beginGroup(m_settingsGroup);
    QVariant var = settings->value(m_settingsKey, m_defaultValue);
    // work around old ini files containing @Invalid() entries
    if (isCheckable() && !var.isValid())
        var = false;
    setValue(var);
    //qDebug() << "READING: " << var.isValid() << m_settingsKey << " -> " << m_value
    //    << " (default: " << m_defaultValue << ")" << var;
    settings->endGroup();
}

/*
    Uses \c settingsGroup() and \c settingsKey() to write the 
    item to \a settings,

    \sa settingsKey(), settingsGroup(), readSettings()
*/
void SavedAction::writeSettings(QSettings *settings)
{
    if (m_settingsGroup.isEmpty() || m_settingsKey.isEmpty())
        return;
    settings->beginGroup(m_settingsGroup);
    settings->setValue(m_settingsKey, m_value);
    //qDebug() << "WRITING: " << m_settingsKey << " -> " << toString();
    settings->endGroup();
}
   
/*
    A \c SavedAction can be connected to a widget, typically a
    checkbox, radiobutton, or a lineedit in some configuration dialog.

    The widget will retrieve its contents from the SavedAction's 
    value, and - depending on the \a ApplyMode - either write
    changes back immediately, or when \s SavedAction::apply()
    is called explicitly.

    \sa apply(), disconnectWidget()
*/
void SavedAction::connectWidget(QWidget *widget, ApplyMode applyMode)
{
    QTC_ASSERT(!m_widget,
        qDebug() << "ALREADY CONNECTED: " << widget << m_widget << toString(); return);
    m_widget = widget;
    m_applyMode = applyMode;
    
    if (QAbstractButton *button = qobject_cast<QAbstractButton *>(widget)) {
        if (button->isCheckable()) {
            button->setChecked(m_value.toBool());
            connect(button, SIGNAL(clicked(bool)),
                this, SLOT(checkableButtonClicked(bool)));
        } else {
            connect(button, SIGNAL(clicked()),
                this, SLOT(uncheckableButtonClicked()));
        }
    } else if (QSpinBox *spinBox = qobject_cast<QSpinBox *>(widget)) {
        spinBox->setValue(m_value.toInt());
        //qDebug() << "SETTING VALUE" << spinBox->value(); 
        connect(spinBox, SIGNAL(valueChanged(int)),
            this, SLOT(spinBoxValueChanged(int)));
        connect(spinBox, SIGNAL(valueChanged(QString)),
            this, SLOT(spinBoxValueChanged(QString)));
    } else if (QLineEdit *lineEdit = qobject_cast<QLineEdit *>(widget)) {
        lineEdit->setText(m_value.toString());
        //qDebug() << "SETTING TEXT" << lineEdit->text(); 
        connect(lineEdit, SIGNAL(editingFinished()),
            this, SLOT(lineEditEditingFinished()));
    } else if (PathChooser *pathChooser = qobject_cast<PathChooser *>(widget)) {
        pathChooser->setPath(m_value.toString());
        connect(pathChooser, SIGNAL(editingFinished()),
            this, SLOT(pathChooserEditingFinished()));
        connect(pathChooser, SIGNAL(browsingFinished()),
            this, SLOT(pathChooserEditingFinished()));
    } else {
        qDebug() << "Cannot connect widget " << widget << toString();
    }
}

/*
    Disconnects the \c SavedAction from a widget.

    \sa apply(), connectWidget()
*/
void SavedAction::disconnectWidget()
{
    m_widget = 0;
}

void SavedAction::apply(QSettings *s)
{
    if (QAbstractButton *button = qobject_cast<QAbstractButton *>(m_widget))
        setValue(button->isChecked());
    else if (QLineEdit *lineEdit = qobject_cast<QLineEdit *>(m_widget))
        setValue(lineEdit->text());
    else if (QSpinBox *spinBox = qobject_cast<QSpinBox *>(m_widget))
        setValue(spinBox->value());
    else if (PathChooser *pathChooser = qobject_cast<PathChooser *>(m_widget))
        setValue(pathChooser->path());
    if (s)
       writeSettings(s);
}

void SavedAction::uncheckableButtonClicked()
{
    QAbstractButton *button = qobject_cast<QAbstractButton *>(sender());
    QTC_ASSERT(button, return);
    //qDebug() << "UNCHECKABLE BUTTON: " << sender();
    QAction::trigger();
}

void SavedAction::checkableButtonClicked(bool)
{
    QAbstractButton *button = qobject_cast<QAbstractButton *>(sender());
    QTC_ASSERT(button, return);
    //qDebug() << "CHECKABLE BUTTON: " << sender();
    if (m_applyMode == ImmediateApply)
        setValue(button->isChecked());
}

void SavedAction::lineEditEditingFinished()
{
    QLineEdit *lineEdit = qobject_cast<QLineEdit *>(sender());
    QTC_ASSERT(lineEdit, return);
    if (m_applyMode == ImmediateApply)
        setValue(lineEdit->text());
}

void SavedAction::spinBoxValueChanged(int value)
{
    QSpinBox *spinBox = qobject_cast<QSpinBox *>(sender());
    QTC_ASSERT(spinBox, return);
    if (m_applyMode == ImmediateApply)
        setValue(value);
}

void SavedAction::spinBoxValueChanged(QString value)
{
    QSpinBox *spinBox = qobject_cast<QSpinBox *>(sender());
    QTC_ASSERT(spinBox, return);
    if (m_applyMode == ImmediateApply)
        setValue(value);
}

void SavedAction::pathChooserEditingFinished()
{
    PathChooser *pathChooser = qobject_cast<PathChooser *>(sender());
    QTC_ASSERT(pathChooser, return);
    if (m_applyMode == ImmediateApply)
        setValue(pathChooser->path());
}

void SavedAction::actionTriggered(bool)
{
    if (isCheckable())
        setValue(isChecked());
    if (actionGroup() && actionGroup()->isExclusive()) {
        // FIXME: should be taken care of more directly
        foreach (QAction *act, actionGroup()->actions())
            if (SavedAction *dact = qobject_cast<SavedAction *>(act))
                dact->setValue(bool(act == this));
    }
}

void SavedAction::trigger(const QVariant &data)
{
    setData(data);
    QAction::trigger();
}


//////////////////////////////////////////////////////////////////////////
//
// SavedActionSet
//
//////////////////////////////////////////////////////////////////////////

void SavedActionSet::insert(SavedAction *action, QWidget *widget)
{
    m_list.append(action);
    if (widget)
        action->connectWidget(widget);
}

void SavedActionSet::apply(QSettings *settings)
{
    foreach (SavedAction *action, m_list)
        action->apply(settings);
}

void SavedActionSet::finish()
{
    foreach (SavedAction *action, m_list)
        action->disconnectWidget();
}