implement entire project in nodes

Project items are now represented directly in nodes opening up more versatility and possibilities. This is the first iteration of this and will be buggy. Need to test thoroughly.

app/dialog/preferences/preferences.cpp

@@ -36,66 +36,16 @@
 namespace olive {
 
 PreferencesDialog::PreferencesDialog(QWidget *parent, QMenuBar* main_menu_bar) :
-  QDialog(parent)
+  ConfigDialogBase(parent)
 {
   setWindowTitle(tr("Preferences"));
 
-  QVBoxLayout* layout = new QVBoxLayout(this);
-
-  QSplitter* splitter = new QSplitter();
-  splitter->setChildrenCollapsible(false);
-  layout->addWidget(splitter);
-
-  list_widget_ = new QListWidget();
-
-  preference_pane_stack_ = new QStackedWidget(this);
-
   AddTab(new PreferencesGeneralTab(), tr("General"));
   AddTab(new PreferencesAppearanceTab(), tr("Appearance"));
   AddTab(new PreferencesBehaviorTab(), tr("Behavior"));
   AddTab(new PreferencesDiskTab(), tr("Disk"));
   AddTab(new PreferencesAudioTab(), tr("Audio"));
   AddTab(new PreferencesKeyboardTab(main_menu_bar), tr("Keyboard"));
-
-  splitter->addWidget(list_widget_);
-  splitter->addWidget(preference_pane_stack_);
-
-  QDialogButtonBox* button_box = new QDialogButtonBox(this);
-  button_box->setOrientation(Qt::Horizontal);
-  button_box->setStandardButtons(QDialogButtonBox::Cancel|QDialogButtonBox::Ok);
-
-  layout->addWidget(button_box);
-
-  connect(button_box, &QDialogButtonBox::accepted, this, &PreferencesDialog::accept);
-  connect(button_box, &QDialogButtonBox::rejected, this, &PreferencesDialog::reject);
-
-  connect(list_widget_,
-          &QListWidget::currentRowChanged,
-          preference_pane_stack_,
-          &QStackedWidget::setCurrentIndex);
-}
-
-void PreferencesDialog::accept()
-{
-  foreach (PreferencesTab* tab, tabs_) {
-    if (!tab->Validate()) {
-      return;
-    }
-  }
-
-  foreach (PreferencesTab* tab, tabs_) {
-    tab->Accept();
-  }
-
-  QDialog::accept();
-}
-
-void PreferencesDialog::AddTab(PreferencesTab *tab, const QString &title)
-{
-  list_widget_->addItem(title);
-  preference_pane_stack_->addWidget(tab);
-
-  tabs_.append(tab);
 }
 
 }