signalsloteditor.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <qtundo_p.h>
#include "signalsloteditor.h"
#include "default_membersheet.h"
#include "signalsloteditor_p.h"

#include <QtDesigner/QtDesigner>

#include <QtGui/QAction>
#include <QtGui/QDialog>
#include <QtGui/QListWidget>
#include <QtGui/QTreeWidget>
#include <QtGui/QItemDelegate>
#include <QtGui/QItemEditorFactory>
#include <QtGui/QHBoxLayout>
#include <QtGui/QVBoxLayout>
#include <QtGui/QPushButton>
#include <QtGui/QLabel>
#include <QtGui/QCheckBox>
#include <QtGui/QComboBox>
#include <QtGui/QStandardItemModel>
#include <QtGui/QHeaderView>
#include <QtGui/QApplication>
#include <QtGui/QMenu>

#include <QtCore/qdebug.h>

namespace qdesigner_internal {

/*******************************************************************************
** Tools
*/

template <typename T>
static void merge(QDesignerFormWindowInterface *form, QStringList *lst, const QList<T> &elts)
{
    QDesignerMetaDataBaseInterface *db = form->core()->metaDataBase();

    foreach (T e, elts) {
        QAction *action = qobject_cast<QAction*>(e);

        if (action && db->item(action->menu())) {
            // good
        } else if (!db->item(e)) {
            // hmm, nothing to do
            continue;
        }

        QString name = e->objectName();

        if (action && action->menu())
            name = action->menu()->objectName();

        if (name.isEmpty())
            continue;

        lst->append(name);
    }
}

QStringList objectNameList(QDesignerFormWindowInterface *form)
{
    QDesignerFormWindowCursorInterface *cursor = form->cursor();
    QStringList result;
    for (int i = 0; i < cursor->widgetCount(); ++i) {
        QString name = cursor->widget(i)->objectName().trimmed();
        if (!name.isEmpty())
            result.append(name);
    }

    if (form->mainContainer()) {
        merge(form, &result, qFindChildren<QAction*>(form->mainContainer()));
    }

    result.sort();

    return result;
}

QStringList memberList(QDesignerFormWindowInterface *form, QObject *object, MemberType member_type)
{
    QStringList result;

    if (object == 0)
        return result;

    QDesignerMemberSheetExtension *members
        = qt_extension<QDesignerMemberSheetExtension*>
                (form->core()->extensionManager(), object);
    Q_ASSERT(members != 0);

    for (int i = 0; i < members->count(); ++i) {
        if (!members->isVisible(i))
            continue;

        if (member_type == SignalMember && !members->isSignal(i))
            continue;

        if (member_type == SlotMember && !members->isSlot(i))
            continue;

        result.append(members->signature(i));
    }

    return result;
}

bool signalMatchesSlot(const QString &signal, const QString &slot)
{
    bool result = true;

    do {
        int signal_idx = signal.indexOf(QLatin1Char('('));
        int slot_idx = slot.indexOf(QLatin1Char('('));
        if (signal_idx == -1 || slot_idx == -1)
            break;

        ++signal_idx; ++slot_idx;

        if (slot.at(slot_idx) == QLatin1Char(')'))
            break;

        while (signal_idx < signal.size() && slot_idx < slot.size()) {
            QChar signal_c = signal.at(signal_idx);
            QChar slot_c = slot.at(slot_idx);

            if (signal_c == QLatin1Char(',') && slot_c == QLatin1Char(')'))
                break;

            if (signal_c == QLatin1Char(')') && slot_c == QLatin1Char(')'))
                break;

            if (signal_c != slot_c) {
                result = false;
                break;
            }

            ++signal_idx; ++slot_idx;
        }
    } while (false);

    return result;
}

ClassList classList(const QString &obj_name, MemberType member_type,
                            const QString &peer, QDesignerFormWindowInterface *form)
{
    ClassList result;

    QObject *object = qFindChild<QObject*>(form, obj_name);

    if (object == 0)
        return result;

    QDesignerMemberSheetExtension *members
        = qt_extension<QDesignerMemberSheetExtension*>
                (form->core()->extensionManager(), object);
    Q_ASSERT(members != 0);

    QString class_name;
    QStringList member_list;
    for (int i = members->count(); i >= 0; --i) {
        if (!members->isVisible(i))
            continue;

        if (member_type == SignalMember && !members->isSignal(i))
            continue;

        if (member_type == SlotMember && !members->isSlot(i))
            continue;

        QString signal = member_type == SignalMember ? members->signature(i) : peer;
        QString slot = member_type == SignalMember ? peer : members->signature(i);
        if (!signalMatchesSlot(signal, slot))
            continue;

        QString s = members->declaredInClass(i);
        if (s != class_name) {
            if (!member_list.isEmpty())
                result.append(ClassInfo(class_name, member_list));
            class_name = s;
            member_list.clear();
        }
        member_list.append(members->signature(i));
    }
    if (!member_list.isEmpty())
        result.append(ClassInfo(class_name, member_list));

    return result;
}

/*******************************************************************************
** OldSignalSlotDialog
*/

class OldSignalSlotDialog : public QDialog
{
    Q_OBJECT
public:
    OldSignalSlotDialog(QDesignerFormEditorInterface *core, QWidget *sender, QWidget *receiver, QWidget *parent = 0);

    QString signal() const;
    QString slot() const;

    void setSignalSlot(const QString &signal, const QString &slot);

private slots:
    void selectSignal(QListWidgetItem *item);
    void selectSlot(QListWidgetItem *item);
    void populateSignalList();
    void populateSlotList(const QString &signal = QString());

private:
    QListWidget *m_signal_list, *m_slot_list;
    QPushButton *m_ok_button;
    QWidget *m_source, *m_destination;
    QDesignerFormEditorInterface *m_core;
    QCheckBox *m_show_all_checkbox;
};

// ### deprecated
static QString realObjectName(QDesignerFormEditorInterface *core, QObject *object)
{
    if (object == 0)
        return QString();

    QString object_name = object->objectName();
    QDesignerMetaDataBaseInterface *mdb = core->metaDataBase();
    QDesignerMetaDataBaseItemInterface *item = mdb->item(object);
    if (item != 0)
        object_name = item->name();
    return object_name;
}

static QString realClassName(QDesignerFormEditorInterface *core, QWidget *widget)
{
    QString class_name = QLatin1String(widget->metaObject()->className());
    QDesignerWidgetDataBaseInterface *wdb = core->widgetDataBase();
    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 QString::fromUtf8("%1 (%2)")
            .arg(realObjectName(core, widget))
            .arg(realClassName(core, widget));
}

void OldSignalSlotDialog::populateSlotList(const QString &signal)
{
    QString selectedName;
    QList<QListWidgetItem *> list = m_slot_list->selectedItems();
    if (list.size() > 0) {
        QListWidgetItem *item = list.at(0);
        selectedName = item->text();
    }
    m_slot_list->clear();

    bool show_all = m_show_all_checkbox->isChecked();

    QStringList signatures;

    if (QDesignerMemberSheetExtension *members
            = qt_extension<QDesignerMemberSheetExtension*>
                    (m_core->extensionManager(), m_destination)) {
        for (int i=0; i<members->count(); ++i) {
            if (!members->isVisible(i))
                continue;

            if (!show_all && members->inheritedFromWidget(i))
                continue;

            if (members->isSlot(i)) {
                if (!signalMatchesSlot(signal, members->signature(i)))
                    continue;

                signatures.append(members->signature(i));
            }
        }
    }

    signatures.sort();

    foreach (QString sig, signatures) {
        QListWidgetItem *item = new QListWidgetItem(m_slot_list);
        item->setText(sig);
        if (sig == selectedName)
            m_slot_list->setItemSelected(item, true);
    }

    if (m_slot_list->selectedItems().isEmpty())
        m_ok_button->setEnabled(false);
}

void OldSignalSlotDialog::populateSignalList()
{
    QString selectedName;
    QList<QListWidgetItem *> list = m_signal_list->selectedItems();
    if (list.size() > 0) {
        QListWidgetItem *item = list.at(0);
        selectedName = item->text();
    }
    m_signal_list->clear();

    bool show_all = m_show_all_checkbox->isChecked();

    QStringList signatures;

    if (QDesignerMemberSheetExtension *members = qt_extension<QDesignerMemberSheetExtension*>(m_core->extensionManager(), m_source)) {
        for (int i=0; i<members->count(); ++i) {
            if (!members->isVisible(i))
                continue;

            if (!show_all && members->inheritedFromWidget(i))
                continue;

            if (members->isSignal(i)) {
                signatures.append(members->signature(i));
            }
        }
    }

    signatures.sort();

    bool found_selected = false;
    foreach (QString sig, signatures) {
        QListWidgetItem *item = new QListWidgetItem(m_signal_list);
        item->setText(sig);
        if (!selectedName.isEmpty() && sig == selectedName) {
            m_signal_list->setItemSelected(item, true);
            found_selected = true;
        }
    }

    if (!found_selected)
        selectedName.clear();

    populateSlotList(selectedName);
    if (!found_selected) {
        m_slot_list->setEnabled(false);
    }
}

// ### use designer
OldSignalSlotDialog::OldSignalSlotDialog(QDesignerFormEditorInterface *core, QWidget *source, QWidget *destination,
                                    QWidget *parent)
    : QDialog(parent)
{
    m_source = source;
    m_destination = destination;
    m_core = core;

    m_signal_list = new QListWidget(this);
    connect(m_signal_list,
                SIGNAL(itemClicked(QListWidgetItem*)),
            this,
                SLOT(selectSignal(QListWidgetItem*)));
    m_slot_list = new QListWidget(this);
    connect(m_slot_list,
                SIGNAL(itemClicked(QListWidgetItem*)),
            this,
                SLOT(selectSlot(QListWidgetItem*)));
    m_slot_list->setEnabled(false);

    m_ok_button = new QPushButton(tr("OK"), this);
    connect(m_ok_button, SIGNAL(clicked()), this, SLOT(accept()));
    QPushButton *cancel_button = new QPushButton(tr("Cancel"), this);
    connect(cancel_button, SIGNAL(clicked()), this, SLOT(reject()));
    m_ok_button->setEnabled(false);
    m_show_all_checkbox = new QCheckBox(tr("Show all signals and slots"), this);
    m_show_all_checkbox->setChecked(false);
    connect(m_show_all_checkbox, SIGNAL(toggled(bool)), this, SLOT(populateSignalList()));

    QLabel *source_label = new QLabel(this);
    source_label->setText(widgetLabel(core, source));
    QLabel *destination_label = new QLabel(this);
    destination_label->setText(widgetLabel(core, destination));

    QVBoxLayout *l1 = new QVBoxLayout(this);

    QHBoxLayout *l2 = new QHBoxLayout();
    l1->addLayout(l2);

    QVBoxLayout *l3 = new QVBoxLayout();
    l2->addLayout(l3);

    l3->addWidget(source_label);
    l3->addWidget(m_signal_list);

    QVBoxLayout *l4 = new QVBoxLayout();
    l2->addLayout(l4);

    l4->addWidget(destination_label);
    l4->addWidget(m_slot_list);

    QHBoxLayout *l5 = new QHBoxLayout();
    l1->addLayout(l5);

    l5->addWidget(m_show_all_checkbox);
    l5->addStretch();
#ifdef Q_WS_MAC
    l5->addWidget(cancel_button);
    l5->addWidget(m_ok_button);
#else
    l5->addWidget(m_ok_button);
    l5->addWidget(cancel_button);
#endif

    setWindowTitle(tr("Configure Connection"));

    populateSignalList();
}

static QListWidgetItem *findItem(const QListWidget &list_widget, const QString &text)
{
    QListWidgetItem *result = 0;
    for (int i = 0; i < list_widget.count(); ++i) {
        QListWidgetItem *item = list_widget.item(i);
        if (item->text() == text) {
            result = item;
            break;
        }
    }
    return result;
}