src/qtui/settingsdlg.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2016 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
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  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  19  ***************************************************************************/
  20
  21 #include <QIcon>
  22 #include <QMessageBox>
  23 #include <QPushButton>
  24
  25 #include "settingsdlg.h"
  26
  27 #include "client.h"
  28
  29 SettingsDlg::SettingsDlg(QWidget *parent)
  30     : QDialog(parent),
  31     _currentPage(0)
  32 {
  33     ui.setupUi(this);
  34     setModal(true);
  35     setAttribute(Qt::WA_DeleteOnClose, true);
  36     setWindowIcon(QIcon::fromTheme("configure"));
  37
  38     updateGeometry();
  39
  40     ui.settingsTree->setRootIsDecorated(false);
  41
  42     connect(ui.settingsTree, SIGNAL(itemSelectionChanged()), this, SLOT(itemSelected()));
  43     connect(ui.buttonBox, SIGNAL(clicked(QAbstractButton *)), this, SLOT(buttonClicked(QAbstractButton *)));
  44
  45     connect(Client::instance(), SIGNAL(coreConnectionStateChanged(bool)), SLOT(coreConnectionStateChanged()));
  46
  47     setButtonStates();
  48
  49     // Some settings panes can take a good bit of space.  To avoid squashing the settings tree, try
  50     // to resize the dialog.  If needed, it can always be resized by the user to take less space.
  51     //
  52     // Only try to resize if the sizes are valid.  This shouldn't happen.. but better to be safe.
  53     // See http://www.qtcentre.org/threads/3427-invalid-sizeHint()
  54     if (ui.settingsTree->sizeHint().isValid() && ui.settingsTree->size().isValid()) {
  55         // Find out how much width would make the settings tree happy
  56         int wantedExtraWidth = ui.settingsTree->sizeHint().width()
  57                 - ui.settingsTree->size().width();
  58         // If more space is needed, try to resize to allow for it.  Qt should keep the dialog within
  59         // the bounds of the screen.
  60         if (wantedExtraWidth > 0) {
  61             this->resize(this->width() + wantedExtraWidth, this->height());
  62         }
  63     }
  64 }
  65
  66
  67 void SettingsDlg::coreConnectionStateChanged()
  68 {
  69     for (int i = 0; i < ui.settingsTree->topLevelItemCount(); i++) {
  70         QTreeWidgetItem *catItem = ui.settingsTree->topLevelItem(i);
  71         for (int j = 0; j < catItem->childCount(); j++) {
  72             QTreeWidgetItem *item = catItem->child(j);
  73             setItemState(item);
  74         }
  75         setItemState(catItem);
  76     }
  77 }
  78
  79
  80 void SettingsDlg::setItemState(QTreeWidgetItem *item)
  81 {
  82     SettingsPage *sp = qobject_cast<SettingsPage *>(item->data(0, SettingsPageRole).value<QObject *>());
  83     Q_ASSERT(sp);
  84     bool disabledDueToConnection = !Client::isConnected() && sp->needsCoreConnection();
  85     bool disabledDueToOwnChoice = !sp->isSelectable();
  86     item->setDisabled(disabledDueToConnection || disabledDueToOwnChoice);
  87 }
  88
  89
  90 void SettingsDlg::registerSettingsPage(SettingsPage *sp)
  91 {
  92     sp->setParent(ui.settingsStack);
  93     ui.settingsStack->addWidget(sp);
  94
  95     connect(sp, SIGNAL(changed(bool)), this, SLOT(setButtonStates()));
  96
  97     QTreeWidgetItem *cat;
  98     QList<QTreeWidgetItem *> cats = ui.settingsTree->findItems(sp->category(), Qt::MatchExactly);
  99     if (!cats.count()) {
 100         cat = new QTreeWidgetItem(ui.settingsTree, QStringList(sp->category()));
 101         cat->setExpanded(true);
 102         cat->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
 103     }
 104     else {
 105         cat = cats[0];
 106     }
 107
 108     QTreeWidgetItem *item;
 109     if (sp->title().isEmpty())
 110         item = cat;
 111     else
 112         item = new QTreeWidgetItem(cat, QStringList(sp->title()));
 113
 114     item->setData(0, SettingsPageRole, QVariant::fromValue<QObject *>(sp));
 115     ui.settingsTree->setMinimumWidth(ui.settingsTree->header()->sectionSizeHint(0) + 5);
 116     pageIsLoaded[sp] = false;
 117     if (!ui.settingsTree->selectedItems().count())
 118         ui.settingsTree->setCurrentItem(item);
 119
 120     setItemState(item);
 121 }
 122
 123
 124 void SettingsDlg::selectPage(SettingsPage *sp)
 125 {
 126     if (!sp) {
 127         _currentPage = 0;
 128         ui.settingsStack->setCurrentIndex(0);
 129         ui.pageTitle->setText(tr("Settings"));
 130         return;
 131     }
 132
 133     if (!pageIsLoaded[sp]) {
 134         sp->load();
 135         pageIsLoaded[sp] = true;
 136     }
 137
 138     if (sp != currentPage() && currentPage() != 0 && currentPage()->hasChanged()) {
 139         int ret = QMessageBox::warning(this, tr("Save changes"),
 140             tr("There are unsaved changes on the current configuration page. Would you like to apply your changes now?"),
 141             QMessageBox::Discard|QMessageBox::Save|QMessageBox::Cancel, QMessageBox::Cancel);
 142         if (ret == QMessageBox::Save) {
 143             if (!applyChanges()) sp = currentPage();
 144         }
 145         else if (ret == QMessageBox::Discard) {
 146             undoChanges();
 147         }
 148         else sp = currentPage();
 149     }
 150
 151     if (sp != currentPage()) {
 152         if (sp->title().isEmpty()) {
 153             ui.pageTitle->setText(sp->category());
 154             setWindowTitle(tr("Configure %1").arg(sp->category()));
 155         }
 156         else {
 157             ui.pageTitle->setText(sp->title());
 158             setWindowTitle(tr("Configure %1").arg(sp->title()));
 159         }
 160
 161         ui.settingsStack->setCurrentWidget(sp);
 162         _currentPage = sp;
 163     }
 164     setButtonStates();
 165 }
 166
 167
 168 void SettingsDlg::itemSelected()
 169 {
 170     QList<QTreeWidgetItem *> items = ui.settingsTree->selectedItems();
 171     SettingsPage *sp = 0;
 172     if (!items.isEmpty()) {
 173         sp = qobject_cast<SettingsPage *>(items[0]->data(0, SettingsPageRole).value<QObject *>());
 174     }
 175     selectPage(sp);
 176 }
 177
 178
 179 void SettingsDlg::setButtonStates()
 180 {
 181     SettingsPage *sp = currentPage();
 182     ui.buttonBox->button(QDialogButtonBox::Apply)->setEnabled(sp && sp->hasChanged());
 183     ui.buttonBox->button(QDialogButtonBox::Reset)->setEnabled(sp && sp->hasChanged());
 184     ui.buttonBox->button(QDialogButtonBox::RestoreDefaults)->setEnabled(sp && sp->hasDefaults());
 185 }
 186
 187
 188 void SettingsDlg::buttonClicked(QAbstractButton *button)
 189 {
 190     switch (ui.buttonBox->standardButton(button)) {
 191     case QDialogButtonBox::Ok:
 192         if (currentPage() && currentPage()->hasChanged()) {
 193             if (applyChanges()) accept();
 194         }
 195         else accept();
 196         break;
 197     case QDialogButtonBox::Apply:
 198         applyChanges();
 199         break;
 200     case QDialogButtonBox::Cancel:
 201         undoChanges();
 202         reject();
 203         break;
 204     case QDialogButtonBox::Reset:
 205         reload();
 206         break;
 207     case QDialogButtonBox::RestoreDefaults:
 208         loadDefaults();
 209         break;
 210     default:
 211         break;
 212     }
 213 }
 214
 215
 216 bool SettingsDlg::applyChanges()
 217 {
 218     if (!currentPage()) return false;
 219     if (currentPage()->aboutToSave()) {
 220         currentPage()->save();
 221         return true;
 222     }
 223     return false;
 224 }
 225
 226
 227 void SettingsDlg::undoChanges()
 228 {
 229     if (currentPage()) {
 230         currentPage()->load();
 231     }
 232 }
 233
 234
 235 void SettingsDlg::reload()
 236 {
 237     if (!currentPage()) return;
 238     int ret = QMessageBox::question(this, tr("Reload Settings"), tr("Do you like to reload the settings, undoing your changes on this page?"),
 239         QMessageBox::Yes|QMessageBox::No, QMessageBox::No);
 240     if (ret == QMessageBox::Yes) {
 241         currentPage()->load();
 242     }
 243 }
 244
 245
 246 void SettingsDlg::loadDefaults()
 247 {
 248     if (!currentPage()) return;
 249     int ret = QMessageBox::question(this, tr("Restore Defaults"), tr("Do you like to restore the default values for this page?"),
 250         QMessageBox::RestoreDefaults|QMessageBox::Cancel, QMessageBox::Cancel);
 251     if (ret == QMessageBox::RestoreDefaults) {
 252         currentPage()->defaults();
 253     }
 254 }