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     *
  16  *   along with this program; if not, write to the                         *
  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     item->setDisabled(!Client::isConnected() && sp->needsCoreConnection());
  85 }
  86
  87
  88 void SettingsDlg::registerSettingsPage(SettingsPage *sp)
  89 {
  90     sp->setParent(ui.settingsStack);
  91     ui.settingsStack->addWidget(sp);
  92
  93     connect(sp, SIGNAL(changed(bool)), this, SLOT(setButtonStates()));
  94
  95     QTreeWidgetItem *cat;
  96     QList<QTreeWidgetItem *> cats = ui.settingsTree->findItems(sp->category(), Qt::MatchExactly);
  97     if (!cats.count()) {
  98         cat = new QTreeWidgetItem(ui.settingsTree, QStringList(sp->category()));
  99         cat->setExpanded(true);
 100         cat->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
 101     }
 102     else {
 103         cat = cats[0];
 104     }
 105
 106     QTreeWidgetItem *item;
 107     if (sp->title().isEmpty())
 108         item = cat;
 109     else
 110         item = new QTreeWidgetItem(cat, QStringList(sp->title()));
 111
 112     item->setData(0, SettingsPageRole, QVariant::fromValue<QObject *>(sp));
 113     ui.settingsTree->setMinimumWidth(ui.settingsTree->header()->sectionSizeHint(0) + 5);
 114     pageIsLoaded[sp] = false;
 115     if (!ui.settingsTree->selectedItems().count())
 116         ui.settingsTree->setCurrentItem(item);
 117
 118     setItemState(item);
 119 }
 120
 121
 122 void SettingsDlg::selectPage(SettingsPage *sp)
 123 {
 124     if (!sp) {
 125         _currentPage = 0;
 126         ui.settingsStack->setCurrentIndex(0);
 127         ui.pageTitle->setText(tr("Settings"));
 128         return;
 129     }
 130
 131     if (!pageIsLoaded[sp]) {
 132         sp->load();
 133         pageIsLoaded[sp] = true;
 134     }
 135
 136     if (sp != currentPage() && currentPage() != 0 && currentPage()->hasChanged()) {
 137         int ret = QMessageBox::warning(this, tr("Save changes"),
 138             tr("There are unsaved changes on the current configuration page. Would you like to apply your changes now?"),
 139             QMessageBox::Discard|QMessageBox::Save|QMessageBox::Cancel, QMessageBox::Cancel);
 140         if (ret == QMessageBox::Save) {
 141             if (!applyChanges()) sp = currentPage();
 142         }
 143         else if (ret == QMessageBox::Discard) {
 144             undoChanges();
 145         }
 146         else sp = currentPage();
 147     }
 148
 149     if (sp != currentPage()) {
 150         if (sp->title().isEmpty()) {
 151             ui.pageTitle->setText(sp->category());
 152             setWindowTitle(tr("Configure %1").arg(sp->category()));
 153         }
 154         else {
 155             ui.pageTitle->setText(sp->title());
 156             setWindowTitle(tr("Configure %1").arg(sp->title()));
 157         }
 158
 159         ui.settingsStack->setCurrentWidget(sp);
 160         _currentPage = sp;
 161     }
 162     setButtonStates();
 163 }
 164
 165
 166 void SettingsDlg::itemSelected()
 167 {
 168     QList<QTreeWidgetItem *> items = ui.settingsTree->selectedItems();
 169     SettingsPage *sp = 0;
 170     if (!items.isEmpty()) {
 171         sp = qobject_cast<SettingsPage *>(items[0]->data(0, SettingsPageRole).value<QObject *>());
 172     }
 173     selectPage(sp);
 174 }
 175
 176
 177 void SettingsDlg::setButtonStates()
 178 {
 179     SettingsPage *sp = currentPage();
 180     ui.buttonBox->button(QDialogButtonBox::Apply)->setEnabled(sp && sp->hasChanged());
 181     ui.buttonBox->button(QDialogButtonBox::Reset)->setEnabled(sp && sp->hasChanged());
 182     ui.buttonBox->button(QDialogButtonBox::RestoreDefaults)->setEnabled(sp && sp->hasDefaults());
 183 }
 184
 185
 186 void SettingsDlg::buttonClicked(QAbstractButton *button)
 187 {
 188     switch (ui.buttonBox->standardButton(button)) {
 189     case QDialogButtonBox::Ok:
 190         if (currentPage() && currentPage()->hasChanged()) {
 191             if (applyChanges()) accept();
 192         }
 193         else accept();
 194         break;
 195     case QDialogButtonBox::Apply:
 196         applyChanges();
 197         break;
 198     case QDialogButtonBox::Cancel:
 199         undoChanges();
 200         reject();
 201         break;
 202     case QDialogButtonBox::Reset:
 203         reload();
 204         break;
 205     case QDialogButtonBox::RestoreDefaults:
 206         loadDefaults();
 207         break;
 208     default:
 209         break;
 210     }
 211 }
 212
 213
 214 bool SettingsDlg::applyChanges()
 215 {
 216     if (!currentPage()) return false;
 217     if (currentPage()->aboutToSave()) {
 218         currentPage()->save();
 219         return true;
 220     }
 221     return false;
 222 }
 223
 224
 225 void SettingsDlg::undoChanges()
 226 {
 227     if (currentPage()) {
 228         currentPage()->load();
 229     }
 230 }
 231
 232
 233 void SettingsDlg::reload()
 234 {
 235     if (!currentPage()) return;
 236     int ret = QMessageBox::question(this, tr("Reload Settings"), tr("Do you like to reload the settings, undoing your changes on this page?"),
 237         QMessageBox::Yes|QMessageBox::No, QMessageBox::No);
 238     if (ret == QMessageBox::Yes) {
 239         currentPage()->load();
 240     }
 241 }
 242
 243
 244 void SettingsDlg::loadDefaults()
 245 {
 246     if (!currentPage()) return;
 247     int ret = QMessageBox::question(this, tr("Restore Defaults"), tr("Do you like to restore the default values for this page?"),
 248         QMessageBox::RestoreDefaults|QMessageBox::Cancel, QMessageBox::Cancel);
 249     if (ret == QMessageBox::RestoreDefaults) {
 250         currentPage()->defaults();
 251     }
 252 }