自学教程：C++ updateWidgets函数代码示例

void AStylePreferences::load(const KDevelop::SourceFormatterStyle &style){    if(!style.content().isEmpty())        m_formatter->loadStyle(style.content());    else        m_formatter->predefinedStyle(style.name());    updateWidgets();    updatePreviewText();}

void LightSourceProperty::setLightPos(const tgt::vec4& lightPos) {    if(getCamera()) {        const tgt::Camera& camera = getCamera()->get();        set(tgt::vec4((camera.getViewMatrixInverse().getRotationalPart() * lightPos).xyz() + getCamera()->getTrackball().getCenter(), 1.f));    } else {        set(lightPos);    }    lightPos_ = lightPos;    updateWidgets();}

void LightSourceProperty::setCamera(CameraProperty* cam) {    camProp_ = cam;    if(camProp_) {        camProp_->onChange(CallMemberAction<LightSourceProperty>(this, &LightSourceProperty::cameraUpdate));        curCenter_ = camProp_->getTrackball().getCenter();        maxDist_ = camProp_->getMaxValue() / 50.f;        updateWidgets();        cameraUpdate();    }}

void QFPLayerControls::createWidgets() {    QGridLayout* lay=new QGridLayout();    setLayout(lay);    QToolButton* btn=new QToolButton(this);    btn->setDefaultAction(actRewind);    lay->addWidget(btn, 0, 0);    btn=new QToolButton(this);    btn->setDefaultAction(actPlayPause);    lay->addWidget(btn, 0, 1);    QWidget* w=new QWidget(this);    w->setMinimumWidth(10);    lay->addWidget(w, 0, 2);    btn=new QToolButton(this);    btn->setDefaultAction(actPrevMoreFrame);    lay->addWidget(btn, 0, 3);    btn=new QToolButton(this);    btn->setDefaultAction(actPrevFrame);    lay->addWidget(btn, 0, 4);    btn=new QToolButton(this);    btn->setDefaultAction(actNextFrame);    lay->addWidget(btn, 0, 5);    btn=new QToolButton(this);    btn->setDefaultAction(actNextMoreFrame);    lay->addWidget(btn, 0, 6);    lay->addItem(new QSpacerItem(20,5), 0, 7);    chkReplay=new QCheckBox(tr("replay"), this);    chkReplay->setChecked(true);    lay->addWidget(chkReplay, 0, 8);    lay->addItem(new QSpacerItem(5,5, QSizePolicy::Expanding), 0, 9);    label=new QLabel("", this);    label->setAlignment(Qt::AlignVCenter|Qt::AlignRight);    label->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);    lay->addWidget(label, 0, 10, 1, 3);    slider=new QSlider(this);    slider->setOrientation(Qt::Horizontal);    slider->setTickPosition(QSlider::TicksBelow);    connect(slider, SIGNAL(valueChanged(int)), this, SLOT(sliderMoved(int)));    lay->addWidget(slider, 1, 0, 1, 10);    spinFPS=new QDoubleSpinBox(this);    spinFPS->setRange(0.1, 100);    spinFPS->setValue(10);    connect(spinFPS, SIGNAL(valueChanged(double)), this, SLOT(updateWidgets()));    lay->addWidget(new QLabel(tr("FPS:"), this), 1, 10);    lay->addWidget(spinFPS, 1, 11);    lay->addItem(new QSpacerItem(10,5,QSizePolicy::MinimumExpanding,QSizePolicy::Preferred), 1,12);    updateWidgets();}

SelectCRSDialog::SelectCRSDialog(        const Georeferencing& georef,        QWidget* parent,        GeorefAlternatives alternatives,        const QString& description ) : QDialog(parent, Qt::WindowSystemMenuHint | Qt::WindowTitleHint) , georef(georef){	setWindowModality(Qt::WindowModal);	setWindowTitle(tr("Select coordinate reference system"));		crs_selector = new CRSSelector(georef, nullptr);	if (georef.isLocal())		crs_selector->clear();		if (alternatives.testFlag(TakeFromMap) && !georef.isLocal())	{		crs_selector->addCustomItem(tr("Same as map"), SpecialCRS::SameAsMap);		crs_selector->setCurrentIndex(0); // TakeFromMap	}		if (alternatives.testFlag(Local) || georef.isLocal())	{		crs_selector->addCustomItem(tr("Local"), SpecialCRS::Local);		crs_selector->setCurrentIndex(0); // TakeFromMap or Local, both is fine.	}		if (alternatives.testFlag(Geographic) && !georef.isLocal())		crs_selector->addCustomItem(tr("Geographic coordinates (WGS84)"), SpecialCRS::Geographic);		status_label = new QLabel();	button_box = new QDialogButtonBox(QDialogButtonBox::Cancel | QDialogButtonBox::Ok);		auto form_layout = new QFormLayout();	if (!description.isEmpty())	{		form_layout->addRow(new QLabel(description));		form_layout->addItem(Util::SpacerItem::create(this));	}	form_layout->addRow(QCoreApplication::translate("GeoreferencingDialog", "&Coordinate reference system:"), crs_selector);	form_layout->addRow(tr("Status:"), status_label);	form_layout->addItem(Util::SpacerItem::create(this));	crs_selector->setDialogLayout(form_layout);		auto layout = new QVBoxLayout();	layout->addLayout(form_layout, 1);	layout->addWidget(button_box, 0);	setLayout(layout);		connect(crs_selector, &CRSSelector::crsChanged, this, &SelectCRSDialog::updateWidgets);	connect(button_box, &QDialogButtonBox::accepted, this, &SelectCRSDialog::accept);	connect(button_box, &QDialogButtonBox::rejected, this, &SelectCRSDialog::reject);		updateWidgets();}

DisplayFilterExpressionDialog::DisplayFilterExpressionDialog(QWidget *parent) :    GeometryStateDialog(parent),    ui(new Ui::DisplayFilterExpressionDialog),    ftype_(FT_NONE),    field_(NULL){    ui->setupUi(this);    if (parent) loadGeometry(parent->width() * 2 / 3, parent->height());    setWindowTitle(wsApp->windowTitleString(tr("Display Filter Expression")));    setWindowIcon(wsApp->normalIcon());    proto_initialize_all_prefixes();    ui->fieldTreeWidget->setToolTip(ui->fieldLabel->toolTip());    ui->searchLineEdit->setToolTip(ui->searchLabel->toolTip());    ui->relationListWidget->setToolTip(ui->relationLabel->toolTip());    ui->valueLineEdit->setToolTip(ui->valueLabel->toolTip());    ui->enumListWidget->setToolTip(ui->enumLabel->toolTip());    ui->rangeLineEdit->setToolTip(ui->rangeLabel->toolTip());    // Relation list    new QListWidgetItem("is present", ui->relationListWidget, present_op_);    new QListWidgetItem("==", ui->relationListWidget, eq_op_);    new QListWidgetItem("!=", ui->relationListWidget, ne_op_);    new QListWidgetItem(">", ui->relationListWidget, gt_op_);    new QListWidgetItem("<", ui->relationListWidget, lt_op_);    new QListWidgetItem(">=", ui->relationListWidget, ge_op_);    new QListWidgetItem("<=", ui->relationListWidget, le_op_);    new QListWidgetItem("contains", ui->relationListWidget, contains_op_);    new QListWidgetItem("matches", ui->relationListWidget, matches_op_);    value_label_pfx_ = ui->valueLabel->text();    connect(ui->valueLineEdit, SIGNAL(textEdited(QString)), this, SLOT(updateWidgets()));    connect(ui->rangeLineEdit, SIGNAL(textEdited(QString)), this, SLOT(updateWidgets()));    // Trigger updateWidgets    ui->fieldTreeWidget->selectionModel()->clear();    QTimer::singleShot(0, this, SLOT(fillTree()));}

CommandWidget::CommandWidget(QWidget *parent)    : QWidget(parent)    , ui(new Ui::CommandWidget){    ui->setupUi(this);    connect(ui->lineEditName, &QLineEdit::textChanged,            this, &CommandWidget::onLineEditNameTextChanged);    connect(ui->buttonIcon, &IconSelectButton::currentIconChanged,            this, &CommandWidget::onButtonIconCurrentIconChanged);    connect(ui->checkBoxShowAdvanced, &QCheckBox::stateChanged,            this, &CommandWidget::onCheckBoxShowAdvancedStateChanged);    for (auto checkBox : findChildren<QCheckBox *>()) {        connect(checkBox, &QCheckBox::stateChanged,                this, &CommandWidget::updateWidgets);    }    for (auto lineEdit : findChildren<QLineEdit *>()) {        connect(lineEdit, &QLineEdit::textEdited,                this, &CommandWidget::updateWidgets);    }    connect(ui->shortcutButtonGlobalShortcut, &ShortcutButton::shortcutAdded,            this, &CommandWidget::updateWidgets);    connect(ui->shortcutButtonGlobalShortcut, &ShortcutButton::shortcutRemoved,            this, &CommandWidget::updateWidgets);    connect(ui->commandEdit, &CommandEdit::changed,            this, &CommandWidget::updateWidgets);    connect(ui->commandEdit, &CommandEdit::commandTextChanged,            this, &CommandWidget::onCommandEditCommandTextChanged);    updateWidgets();#ifdef NO_GLOBAL_SHORTCUTS    ui->checkBoxGlobalShortcut->hide();    ui->shortcutButtonGlobalShortcut->hide();#else    ui->checkBoxGlobalShortcut->setIcon(iconShortcut());#endif    ui->checkBoxAutomatic->setIcon(iconClipboard());    ui->checkBoxInMenu->setIcon(iconMenu());    ui->checkBoxIsScript->setIcon(iconScript());    ui->checkBoxDisplay->setIcon(iconDisplay());    // Add tab names to combo boxes.    initTabComboBox(ui->comboBoxCopyToTab);    initTabComboBox(ui->comboBoxOutputTab);    if ( !createPlatformNativeInterface()->canGetWindowTitle() )        ui->lineEditWindow->hide();}

// Set mode of file selectorvoid FileSelectorWidget::setMode(FileSelectorWidget::SelectionMode mode, QDir startingDir){	mode_ = mode;	// Set relevant selection mode for file view	if (mode_ == FileSelectorWidget::OpenMultipleMode) ui.FileView->setSelectionMode(QTableView::ExtendedSelection);	else ui.FileView->setSelectionMode(QTableView::SingleSelection);	setCurrentDirectory(startingDir.absolutePath());	updateWidgets();}

void WirelessFrame::on_fcsComboBox_activated(int index){    QString cur_iface = ui->interfaceComboBox->currentText();    if (cur_iface.isEmpty()) return;    if (ws80211_set_fcs_validation(cur_iface.toUtf8().constData(), (enum ws80211_fcs_validation) index) != 0) {        QString err_str = tr("Unable to set FCS validation behavior.");        emit pushAdapterStatus(err_str);    }    updateWidgets();}

void PrinterSettings::delProfile(){    if (ui->profilesList->count() == 1)    {        QMessageBox::warning(this, windowTitle(), "I can't remove last profile.");        return;    }    delete currentItem();    updateWidgets();}

CaptureInterfacesDialog::CaptureInterfacesDialog(QWidget *parent) :    GeometryStateDialog(parent),    ui(new Ui::CaptureInterfacesDialog){    ui->setupUi(this);    loadGeometry();    setWindowTitle(wsApp->windowTitleString(tr("Capture Interfaces")));    stat_timer_ = NULL;    stat_cache_ = NULL;    ui->buttonBox->button(QDialogButtonBox::Ok)->setText(tr("Start"));    // Start out with the list *not* sorted, so they show up in the order    // in which they were provided    ui->interfaceTree->sortByColumn(-1, Qt::AscendingOrder);    ui->interfaceTree->setItemDelegateForColumn(col_interface_, &interface_item_delegate_);    ui->interfaceTree->setItemDelegateForColumn(col_traffic_, new SparkLineDelegate());    ui->interfaceTree->setItemDelegateForColumn(col_link_, &interface_item_delegate_);    ui->interfaceTree->setItemDelegateForColumn(col_snaplen_, &interface_item_delegate_);#ifdef SHOW_BUFFER_COLUMN    ui->interfaceTree->setItemDelegateForColumn(col_buffer_, &interface_item_delegate_);#else    ui->interfaceTree->setColumnHidden(col_buffer_, true);#endif#ifndef SHOW_MONITOR_COLUMN    ui->interfaceTree->setColumnHidden(col_monitor_, true);#endif    ui->interfaceTree->setItemDelegateForColumn(col_filter_, &interface_item_delegate_);    interface_item_delegate_.setTree(ui->interfaceTree);    ui->filenameLineEdit->setPlaceholderText(tr("Leave blank to use a temporary file"));    // Changes in interface selections or capture filters should be propagated    // to the main welcome screen where they will be applied to the global    // capture options.    connect(this, SIGNAL(interfacesChanged()), ui->captureFilterComboBox, SIGNAL(interfacesChanged()));    connect(ui->captureFilterComboBox, SIGNAL(captureFilterSyntaxChanged(bool)), this, SLOT(updateWidgets()));    connect(ui->captureFilterComboBox->lineEdit(), SIGNAL(textEdited(QString)),            this, SLOT(filterEdited()));    connect(ui->captureFilterComboBox->lineEdit(), SIGNAL(textEdited(QString)),            this, SIGNAL(captureFilterTextEdited(QString)));    connect(&interface_item_delegate_, SIGNAL(filterChanged(QString)),            ui->captureFilterComboBox->lineEdit(), SLOT(setText(QString)));    connect(&interface_item_delegate_, SIGNAL(filterChanged(QString)),            this, SIGNAL(captureFilterTextEdited(QString)));    connect(this, SIGNAL(ifsChanged()), this, SLOT(refreshInterfaceList()));    connect(wsApp, SIGNAL(localInterfaceListChanged()), this, SLOT(updateLocalInterfaces()));    connect(ui->browseButton, SIGNAL(clicked()), this, SLOT(browseButtonClicked()));    updateWidgets();}

void MainWindowPreferencesFrame::on_foStyleSpecifiedPushButton_clicked(){    QString specified_dir = QFileDialog::getExistingDirectory(this, tr("Open Files In"));    if (specified_dir.isEmpty()) return;    ui->foStyleSpecifiedLineEdit->setText(specified_dir);    prefs_set_string_value(pref_fileopen_dir_, specified_dir.toStdString().c_str(), pref_stashed);    prefs_set_enum_value(pref_fileopen_style_, FO_STYLE_SPECIFIED, pref_stashed);    updateWidgets();}

void ColumnPreferencesFrame::on_deleteToolButton_clicked(){    if (ui->columnTreeWidget->topLevelItemCount() < 2) return;    QTreeWidgetItem *item = ui->columnTreeWidget->currentItem();    if (item) {        ui->columnTreeWidget->invisibleRootItem()->removeChild(item);    }    updateWidgets();}

/* tab changed */void MainWindow::tabChanged(int index){    PTNtab * tab = qobject_cast<PTNtab*>(tabWidget->widget(index));    int mode = tab->getMode();    graphDock->setGraph(tab->getGraphVis());    updateWidgets (mode);    QAbstractButton * button = buttonGroup->button (mode);    button->setChecked(true);    slider->setValue(tab->scaleValue());}

// Set the toggled state to true/false, according to <toggled> and update// any associated widgets or notify any callbacks.bool Toggle::setToggled(const bool toggled){	if (_callbackActive) {		return false;	}	// Update the toggle status and export it to the GTK button	_toggled = toggled;	updateWidgets();	return true;}

void TransFuncProperty::notifyChange() {    executeLinks();    // check if conditions are met and exec actions    for (size_t j = 0; j < conditions_.size(); ++j)        conditions_[j]->exec();    updateWidgets();    // invalidate owner:    invalidateOwner();}

void PlotPredicateProperty::notifyAll() {    std::vector<std::pair<int, PlotPredicate*> > cpy = value_;    // check if conditions are met and exec actions    for (size_t j = 0; j < conditions_.size(); ++j)        conditions_[j]->exec();    updateWidgets();    // invalidate owner:    invalidateOwner();}

voidCQFontChooser::setFixedWidth(bool fixedWidth){  if (fixedWidth == fixedWidth_) return;  fixedWidth_ = fixedWidth;  updateWidgets();  nameChanged();}

void CaptureInterfacesDialog::interfaceSelected(){    InterfaceTree::updateGlobalDeviceSelections(ui->interfaceTree, col_interface_);    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled((global_capture_opts.num_selected > 0) ? true: false);    emit interfacesChanged();    updateSelectedFilter();    updateWidgets();}

ProfileDialog::ProfileDialog(QWidget *parent) :    GeometryStateDialog(parent),    pd_ui_(new Ui::ProfileDialog),    ok_button_(NULL){    GList *fl_entry;    profile_def *profile;    const gchar *profile_name = get_profile_name();    pd_ui_->setupUi(this);    loadGeometry();    setWindowTitle(wsApp->windowTitleString(tr("Configuration Profiles")));    ok_button_ = pd_ui_->buttonBox->button(QDialogButtonBox::Ok);    // XXX - Use NSImageNameAddTemplate and NSImageNameRemoveTemplate to set stock    // icons on macOS.    // Are there equivalent stock icons on Windows?#ifdef Q_OS_MAC    pd_ui_->newToolButton->setAttribute(Qt::WA_MacSmallSize, true);    pd_ui_->deleteToolButton->setAttribute(Qt::WA_MacSmallSize, true);    pd_ui_->copyToolButton->setAttribute(Qt::WA_MacSmallSize, true);    pd_ui_->infoLabel->setAttribute(Qt::WA_MacSmallSize, true);#endif    init_profile_list();    fl_entry = edited_profile_list();    pd_ui_->profileTreeWidget->blockSignals(true);    while (fl_entry && fl_entry->data) {        profile = (profile_def *) fl_entry->data;        QTreeWidgetItem *item = new QTreeWidgetItem(pd_ui_->profileTreeWidget);        item->setText(0, profile->name);        item->setData(0, Qt::UserRole, VariantPointer<GList>::asQVariant(fl_entry));        if (profile->is_global || profile->status == PROF_STAT_DEFAULT) {            QFont ti_font = item->font(0);            ti_font.setItalic(true);            item->setFont(0, ti_font);        } else {            item->setFlags(item->flags() | Qt::ItemIsEditable);        }        if (!profile->is_global && strcmp(profile_name, profile->name) == 0) {            pd_ui_->profileTreeWidget->setCurrentItem(item);        }        fl_entry = g_list_next(fl_entry);    }    pd_ui_->profileTreeWidget->blockSignals(false);    connect(pd_ui_->profileTreeWidget->itemDelegate(), SIGNAL(closeEditor(QWidget*, QAbstractItemDelegate::EndEditHint)),            this, SLOT(editingFinished()));    updateWidgets();}

void SBI_NetworkIconDialog::addProxy(){    const QString name = QInputDialog::getText(this, tr("Add proxy"), tr("Name of proxy:"));    if (name.isEmpty() || ui->comboBox->findText(name) > -1) {        return;    }    ui->comboBox->addItem(name);    ui->comboBox->setCurrentIndex(ui->comboBox->count() - 1);    updateWidgets();}

void ColorCalibrationWidget::currentCalibrationChanged(){  if(currentColor < FieldColors::numOfNonColors)  {    historyBasic.add(colorCalibrationView.console.colorCalibration.copyBasicParameters());  }  else    historyColors[currentColor - FieldColors::numOfNonColors].add(colorCalibrationView.console.colorCalibration[currentColor]);  updateWidgets(currentColor);  setUndoRedo();}

autoCategoriesEditor CategoriesEditor_create (const char32 *title, Categories data) {	try {		autoCategoriesEditor me = Thing_new (CategoriesEditor);		Editor_init (me.peek(), 20, 40, 600, 600, title, data);		my history = CommandHistory_create (100);		update (me.peek(), 0, 0, nullptr, 0);		updateWidgets (me.peek());		return me;	} catch (MelderError) {		Melder_throw (U"Categories window not created.");	}}

static void insert (CategoriesEditor me, int position) {	autostring32 text = GuiText_getString (my text);	if (str32len (text.peek()) != 0) {		autoSimpleString str = SimpleString_create (text.peek());		autoCategoriesEditorInsert command = CategoriesEditorInsert_create (me, str.move(), position);		Command_do (command.peek());		if (my history) {			CommandHistory_insertItem_move (my history.peek(), command.move());		}		updateWidgets (me);	}}

/* Precondition: contiguous selection */static void gui_button_cb_moveDown (CategoriesEditor me, GuiButtonEvent /* event */) {	long posCount;	autoNUMvector<long> posList (GuiList_getSelectedPositions (my list, & posCount), 1);	if (posCount > 0) {		autoCategoriesEditorMoveDown command = CategoriesEditorMoveDown_create (me, posList.peek(), posCount, posList[posCount] + 1);		Command_do (command.peek());		if (my history) {			CommandHistory_insertItem_move (my history.peek(), command.move());		}		updateWidgets (me);	}}

void ProfileDialog::editingFinished(){    QTreeWidgetItem *item = pd_ui_->profileTreeWidget->currentItem();    if (item) {        profile_def *profile = (profile_def *) item->data(0, Qt::UserRole).value<GList *>()->data;        if (item->text(0).compare(profile->name) != 0) {            g_free(profile->name);            profile->name = qstring_strdup(item->text(0));        }    }    updateWidgets();}

void FindFilesDialog::slotTemplateActivated(int index){	if (index < KileGrep::tmEnv) {		m_TemplateList[m_lastTemplateIndex] = template_edit->text();		template_edit->setText(m_TemplateList[index]);	}	else {		template_edit->setText(QString());	}	m_lastTemplateIndex = index;	updateWidgets();}