connectdialog.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#include "connectdialog_p.h"
#include "signalslot_utils_p.h"
 
#include <signalslotdialog_p.h>
#include <metadatabase_p.h>
 
#include <QtDesigner/abstractformwindow.h>
#include <QtDesigner/abstractformeditor.h>
#include <QtDesigner/abstractwidgetdatabase.h>
#include <QtDesigner/qextensionmanager.h>
#include <QtDesigner/abstractlanguage.h>
 
#include <QtWidgets/qpushbutton.h>
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
static QString realClassName(QDesignerFormEditorInterface *core, QWidget *widget)
{
    QString class_name = QLatin1StringView(widget->metaObject()->className());
    const QDesignerWidgetDataBaseInterface *wdb = core->widgetDataBase();
    const int idx = wdb->indexOfObject(widget);
    if (idx != -1)
        class_name = wdb->item(idx)->name();
    return class_name;
}
 
static QString widgetLabel(QDesignerFormEditorInterface *core, QWidget *widget)
{
    return "%1 (%2)"_L1
            .arg(qdesigner_internal::realObjectName(core, widget),
                 realClassName(core, widget));
}
 
namespace qdesigner_internal {
 
ConnectDialog::ConnectDialog(QDesignerFormWindowInterface *formWindow,
                             QWidget *source, QWidget *destination,
                             QWidget *parent) :
    QDialog(parent),
    m_source(source),
    m_destination(destination),
    m_sourceMode(widgetMode(m_source, formWindow)),
    m_destinationMode(widgetMode(m_destination, formWindow)),
    m_formWindow(formWindow)
{
    m_ui.setupUi(this);
 
    connect(m_ui.signalList, &QListWidget::itemClicked,
            this, &ConnectDialog::selectSignal);
    connect(m_ui.slotList, &QListWidget::itemClicked,
            this, &ConnectDialog::selectSlot);
    m_ui.slotList->setEnabled(false);
 
    QPushButton *ok_button = okButton();
    ok_button->setDefault(true);
    ok_button->setEnabled(false);
 
    connect(m_ui.showAllCheckBox, &QCheckBox::toggled, this, &ConnectDialog::populateLists);
 
    QDesignerFormEditorInterface *core = m_formWindow->core();
    m_ui.signalGroupBox->setTitle(widgetLabel(core, source));
    m_ui.slotGroupBox->setTitle(widgetLabel(core, destination));
 
    m_ui.editSignalsButton->setEnabled(m_sourceMode != NormalWidget);
    connect(m_ui.editSignalsButton, &QAbstractButton::clicked,
            this, &ConnectDialog::editSignals);
 
    m_ui.editSlotsButton->setEnabled(m_destinationMode != NormalWidget);
    connect(m_ui.editSlotsButton, &QAbstractButton::clicked,
            this, &ConnectDialog::editSlots);
 
    populateLists();
}
 
ConnectDialog::WidgetMode ConnectDialog::widgetMode(QWidget *w,  QDesignerFormWindowInterface *formWindow)
{
    QDesignerFormEditorInterface *core = formWindow->core();
    if (qt_extension<QDesignerLanguageExtension*>(core->extensionManager(), core))
        return NormalWidget;
 
    if (w == formWindow || formWindow->mainContainer() == w)
        return MainContainer;
 
    if (isPromoted(formWindow->core(), w))
        return PromotedWidget;
 
    return NormalWidget;
}
 
QPushButton *ConnectDialog::okButton()
{
    return m_ui.buttonBox->button(QDialogButtonBox::Ok);
}
 
void ConnectDialog::setOkButtonEnabled(bool e)
{
    okButton()->setEnabled(e);
}
 
void ConnectDialog::populateLists()
{
    populateSignalList();
}
 
void ConnectDialog::setSignalSlot(const QString &signal, const QString &slot)
{
    auto sigItems = m_ui.signalList->findItems(signal, Qt::MatchExactly);
 
    if (sigItems.isEmpty()) {
        m_ui.showAllCheckBox->setChecked(true);
        sigItems = m_ui.signalList->findItems(signal, Qt::MatchExactly);
    }
 
    if (!sigItems.isEmpty()) {
        selectSignal(sigItems.constFirst());
        auto slotItems = m_ui.slotList->findItems(slot, Qt::MatchExactly);
        if (slotItems.isEmpty()) {
            m_ui.showAllCheckBox->setChecked(true);
            slotItems = m_ui.slotList->findItems(slot, Qt::MatchExactly);
        }
        if (!slotItems.isEmpty())
            selectSlot(slotItems.constFirst());
    }
}
 
bool ConnectDialog::showAllSignalsSlots() const
{
    return m_ui.showAllCheckBox->isChecked();
}
 
void ConnectDialog::setShowAllSignalsSlots(bool showIt)
{
    m_ui.showAllCheckBox->setChecked(showIt);
}
 
void ConnectDialog::selectSignal(QListWidgetItem *item)
{
    if (item) {
        m_ui.signalList->setCurrentItem(item);
        populateSlotList(item->text());
        m_ui.slotList->setEnabled(true);
        setOkButtonEnabled(!m_ui.slotList->selectedItems().isEmpty());
    } else {
        m_ui.signalList->clearSelection();
        populateSlotList();
        m_ui.slotList->setEnabled(false);
        setOkButtonEnabled(false);
    }
}
 
void ConnectDialog::selectSlot(QListWidgetItem *item)
{
    if (item) {
        m_ui.slotList->setCurrentItem(item);
    } else {
        m_ui.slotList->clearSelection();
    }
    setOkButtonEnabled(true);
}
 
QString ConnectDialog::signal() const
{
    const auto item_list = m_ui.signalList->selectedItems();
    if (item_list.size() != 1)
        return QString();
    return item_list.at(0)->text();
}
 
QString ConnectDialog::slot() const
{
    const auto item_list = m_ui.slotList->selectedItems();
    if (item_list.size() != 1)
        return QString();
    return item_list.at(0)->text();
}
 
void ConnectDialog::populateSlotList(const QString &signal)
{
    enum { deprecatedSlot = 0 };
    QString selectedName;
    if (const QListWidgetItem * item = m_ui.slotList->currentItem())
        selectedName = item->text();
 
    m_ui.slotList->clear();
 
    QMap<QString, QString> memberToClassName = getMatchingSlots(m_formWindow->core(), m_destination, signal, showAllSignalsSlots());
 
    QFont font = QApplication::font();
    font.setItalic(true);
    QVariant variantFont = QVariant::fromValue(font);
 
    QListWidgetItem *curr = nullptr;
    for (auto itMember = memberToClassName.cbegin(), itMemberEnd = memberToClassName.cend(); itMember != itMemberEnd; ++itMember) {
        const QString member = itMember.key();
        QListWidgetItem *item = new QListWidgetItem(m_ui.slotList);
        item->setText(member);
        if (member == selectedName)
            curr = item;
 
        // Mark deprecated slots red. Not currently in use (historically for Qt 3 slots in Qt 4),
        // but may be used again in the future.
        if (deprecatedSlot) {
            item->setData(Qt::FontRole, variantFont);
            item->setData(Qt::ForegroundRole, QColor(Qt::red));
        }
    }
 
    if (curr)
        m_ui.slotList->setCurrentItem(curr);
 
    if (m_ui.slotList->selectedItems().isEmpty())
        setOkButtonEnabled(false);
}
 
void ConnectDialog::populateSignalList()
{
    enum { deprecatedSignal = 0 };
 
    QString selectedName;
    if (const QListWidgetItem *item = m_ui.signalList->currentItem())
        selectedName = item->text();
 
    m_ui.signalList->clear();
 
    QMap<QString, QString> memberToClassName = getSignals(m_formWindow->core(), m_source, showAllSignalsSlots());
 
    QFont font = QApplication::font();
    font.setItalic(true);
    QVariant variantFont = QVariant::fromValue(font);
 
    QListWidgetItem *curr = nullptr;
    for (auto itMember = memberToClassName.cbegin(), itMemberEnd = memberToClassName.cend(); itMember != itMemberEnd; ++itMember) {
        const QString member = itMember.key();
 
        QListWidgetItem *item = new QListWidgetItem(m_ui.signalList);
        item->setText(member);
        if (!selectedName.isEmpty() && member == selectedName)
            curr = item;
 
        // Mark deprecated signals red. Not currently in use (historically for Qt 3 slots in Qt 4),
        // but may be used again in the future.
        if (deprecatedSignal) {
            item->setData(Qt::FontRole, variantFont);
            item->setData(Qt::ForegroundRole, QColor(Qt::red));
        }
    }
 
    if (curr) {
        m_ui.signalList->setCurrentItem(curr);
    } else {
        selectedName.clear();
    }
 
    populateSlotList(selectedName);
    if (!curr)
        m_ui.slotList->setEnabled(false);
}
 
void ConnectDialog::editSignals()
{
    editSignalsSlots(m_source, m_sourceMode, SignalSlotDialog::FocusSignals);
}
 
void ConnectDialog::editSlots()
{
    editSignalsSlots(m_destination, m_destinationMode, SignalSlotDialog::FocusSlots);
}
 
void ConnectDialog::editSignalsSlots(QWidget *w, WidgetMode mode, int signalSlotDialogModeInt)
{
    const SignalSlotDialog::FocusMode signalSlotDialogMode = static_cast<SignalSlotDialog::FocusMode>(signalSlotDialogModeInt);
    switch (mode) {
    case  NormalWidget:
        break;
    case MainContainer:
        if (SignalSlotDialog::editMetaDataBase(m_formWindow, w, this, signalSlotDialogMode))
            populateLists();
        break;
    case PromotedWidget:
        if (SignalSlotDialog::editPromotedClass(m_formWindow->core(), w, this, signalSlotDialogMode))
            populateLists();
        break;
    }
}
 
}
 
QT_END_NAMESPACE
 
#include "moc_connectdialog_p.cpp"