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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 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 the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "signalsloteditor.h"
#include "signalsloteditor_p.h"
#include "connectdialog_p.h"
#include "signalslot_utils_p.h"
#include <metadatabase_p.h>
#include <ui4_p.h>
#include <qdesigner_formwindowcommand_p.h>
#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerMetaDataBaseInterface>
#include <QtGui/QApplication>
#include <QtGui/QUndoCommand>
#include <QtGui/QMenu>
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
namespace qdesigner_internal {
/*******************************************************************************
** SignalSlotConnection
*/
SignalSlotConnection::SignalSlotConnection(ConnectionEdit *edit, QWidget *source, QWidget *target)
: Connection(edit, source, target)
{
}
DomConnection *SignalSlotConnection::toUi() const
{
DomConnection *result = new DomConnection;
result->setElementSender(sender());
result->setElementSignal(signal());
result->setElementReceiver(receiver());
result->setElementSlot(slot());
DomConnectionHints *hints = new DomConnectionHints;
QList<DomConnectionHint*> list;
QPoint sp = endPointPos(EndPoint::Source);
QPoint tp = endPointPos(EndPoint::Target);
DomConnectionHint *hint = new DomConnectionHint;
hint->setAttributeType(QLatin1String("sourcelabel"));
hint->setElementX(sp.x());
hint->setElementY(sp.y());
list.append(hint);
hint = new DomConnectionHint;
hint->setAttributeType(QLatin1String("destinationlabel"));
hint->setElementX(tp.x());
hint->setElementY(tp.y());
list.append(hint);
hints->setElementHint(list);
result->setElementHints(hints);
return result;
}
void SignalSlotConnection::setSignal(const QString &signal)
{
m_signal = signal;
setLabel(EndPoint::Source, m_signal);
}
void SignalSlotConnection::setSlot(const QString &slot)
{
m_slot = slot;
setLabel(EndPoint::Target, m_slot);
}
QString SignalSlotConnection::sender() const
{
QObject *source = object(EndPoint::Source);
if (!source)
return QString();
SignalSlotEditor *edit = qobject_cast<SignalSlotEditor*>(this->edit());
Q_ASSERT(edit != 0);
return realObjectName(edit->formWindow()->core(), source);
}
QString SignalSlotConnection::receiver() const
{
QObject *sink = object(EndPoint::Target);
if (!sink)
return QString();
SignalSlotEditor *edit = qobject_cast<SignalSlotEditor*>(this->edit());
Q_ASSERT(edit != 0);
return realObjectName(edit->formWindow()->core(), sink);
}
void SignalSlotConnection::updateVisibility()
{
Connection::updateVisibility();
if (isVisible() && (signal().isEmpty() || slot().isEmpty()))
setVisible(false);
}
QString SignalSlotConnection::toString() const
{
return QCoreApplication::translate("SignalSlotConnection", "SENDER(%1), SIGNAL(%2), RECEIVER(%3), SLOT(%4)")
.arg(sender()).arg(signal()).arg(receiver()).arg(slot());
}
SignalSlotConnection::State SignalSlotConnection::isValid(const QWidget *background) const
{
const QObject *source = object(EndPoint::Source);
if (!source)
return ObjectDeleted;
const QObject *target = object(EndPoint::Target);
if (!target)
return ObjectDeleted;
if (m_slot.isEmpty() || m_signal.isEmpty())
return InvalidMethod;
if (const QWidget *sourceWidget = qobject_cast<const QWidget*>(source))
if (!background->isAncestorOf(sourceWidget))
return NotAncestor;
if (const QWidget *targetWidget = qobject_cast<const QWidget*>(target))
if (!background->isAncestorOf(targetWidget))
return NotAncestor;
return Valid;
}
/*******************************************************************************
** Commands
*/
class SetMemberCommand : public QUndoCommand, public CETypes
{
public:
SetMemberCommand(SignalSlotConnection *con, EndPoint::Type type,
const QString &member, SignalSlotEditor *editor);
virtual void redo();
virtual void undo();
private:
const QString m_old_member;
const QString m_new_member;
const EndPoint::Type m_type;
SignalSlotConnection *m_con;
SignalSlotEditor *m_editor;
};
SetMemberCommand::SetMemberCommand(SignalSlotConnection *con, EndPoint::Type type,
const QString &member, SignalSlotEditor *editor) :
m_old_member(type == EndPoint::Source ? con->signal() : con->slot()),
m_new_member(member),
m_type(type),
m_con(con),
m_editor(editor)
{
if (type == EndPoint::Source)
setText(QApplication::translate("Command", "Change signal"));
else
setText(QApplication::translate("Command", "Change slot"));
}
void SetMemberCommand::redo()
{
m_con->update();
if (m_type == EndPoint::Source)
m_con->setSignal(m_new_member);
else
m_con->setSlot(m_new_member);
m_con->update();
emit m_editor->connectionChanged(m_con);
}
void SetMemberCommand::undo()
{
m_con->update();
if (m_type == EndPoint::Source)
m_con->setSignal(m_old_member);
else
m_con->setSlot(m_old_member);
m_con->update();
emit m_editor->connectionChanged(m_con);
}
// Command to modify a connection
class ModifyConnectionCommand : public QDesignerFormWindowCommand
{
public:
explicit ModifyConnectionCommand(QDesignerFormWindowInterface *form,
SignalSlotConnection *conn,
const QString &newSignal,
const QString &newSlot);
virtual void redo();
virtual void undo();
private:
SignalSlotConnection *m_conn;
const QString m_oldSignal;
const QString m_oldSlot;
const QString m_newSignal;
const QString m_newSlot;
};
ModifyConnectionCommand::ModifyConnectionCommand(QDesignerFormWindowInterface *form,
SignalSlotConnection *conn,
const QString &newSignal,
const QString &newSlot) :
QDesignerFormWindowCommand(QCoreApplication::translate("Command", "Change signal-slot connection"), form),
m_conn(conn),
m_oldSignal(conn->signal()),
m_oldSlot(conn->slot()),
m_newSignal(newSignal),
m_newSlot(newSlot)
{
}
void ModifyConnectionCommand::redo()
{
m_conn->setSignal(m_newSignal);
m_conn->setSlot(m_newSlot);
}
void ModifyConnectionCommand::undo()
{
m_conn->setSignal(m_oldSignal);
m_conn->setSlot(m_oldSlot);
}
/*******************************************************************************
** SignalSlotEditor
*/
SignalSlotEditor::SignalSlotEditor(QDesignerFormWindowInterface *form_window, QWidget *parent) :
ConnectionEdit(parent, form_window),
m_form_window(form_window),
m_showAllSignalsSlots(false)
{
}
void SignalSlotEditor::modifyConnection(Connection *con)
{
SignalSlotConnection *sigslot_con = static_cast<SignalSlotConnection*>(con);
ConnectDialog dialog(m_form_window,
sigslot_con->widget(EndPoint::Source),
sigslot_con->widget(EndPoint::Target),
m_form_window->core()->topLevel());
dialog.setSignalSlot(sigslot_con->signal(), sigslot_con->slot());
dialog.setShowAllSignalsSlots(m_showAllSignalsSlots);
if (dialog.exec() == QDialog::Accepted) {
const QString newSignal = dialog.signal();
const QString newSlot = dialog.slot();
if (sigslot_con->signal() != newSignal || sigslot_con->slot() != newSlot) {
ModifyConnectionCommand *cmd = new ModifyConnectionCommand(m_form_window, sigslot_con, newSignal, newSlot);
m_form_window->commandHistory()->push(cmd);
}
}
m_showAllSignalsSlots = dialog.showAllSignalsSlots();
}
Connection *SignalSlotEditor::createConnection(QWidget *source, QWidget *destination)
{
SignalSlotConnection *con = 0;
Q_ASSERT(source != 0);
Q_ASSERT(destination != 0);
ConnectDialog dialog(m_form_window, source, destination, m_form_window->core()->topLevel());
dialog.setShowAllSignalsSlots(m_showAllSignalsSlots);
if (dialog.exec() == QDialog::Accepted) {
con = new SignalSlotConnection(this, source, destination);
con->setSignal(dialog.signal());
con->setSlot(dialog.slot());
}
m_showAllSignalsSlots = dialog.showAllSignalsSlots();
return con;
}
DomConnections *SignalSlotEditor::toUi() const
{
DomConnections *result = new DomConnections;
QList<DomConnection*> list;
const int count = connectionCount();
for (int i = 0; i < count; ++i) {
const SignalSlotConnection *con = static_cast<const SignalSlotConnection*>(connection(i));
Q_ASSERT(con != 0);
// If a widget's parent has been removed or moved to a different form,
// and the parent was not a managed widget
// (a page in a tab widget), we never get a widgetRemoved(). So we filter out
// these child widgets here (check QPointer and verify ancestor).
// Also, the user might demote a promoted widget or remove a fake
// slot in the editor, which causes the connection to become invalid
// once he doubleclicks on the method combo.
switch (con->isValid(background())) {
case SignalSlotConnection::Valid:
list.append(con->toUi());
break;
case SignalSlotConnection::ObjectDeleted:
case SignalSlotConnection::InvalidMethod:
case SignalSlotConnection::NotAncestor:
break;
}
}
result->setElementConnection(list);
return result;
}
QObject *SignalSlotEditor::objectByName(QWidget *topLevel, const QString &name) const
{
if (name.isEmpty())
return 0;
Q_ASSERT(topLevel);
QObject *object = 0;
if (topLevel->objectName() == name)
object = topLevel;
else
object = topLevel->findChild<QObject*>(name);
const QDesignerMetaDataBaseInterface *mdb = formWindow()->core()->metaDataBase();
if (mdb->item(object))
return object;
return 0;
}
void SignalSlotEditor::fromUi(const DomConnections *connections, QWidget *parent)
{
if (connections == 0)
return;
setBackground(parent);
clear();
const QList<DomConnection*> list = connections->elementConnection();
foreach (const DomConnection *dom_con, list) {
QObject *source = objectByName(parent, dom_con->elementSender());
if (source == 0) {
qDebug("SignalSlotEditor::fromUi(): no source widget called \"%s\"",
dom_con->elementSender().toUtf8().constData());
continue;
}
QObject *destination = objectByName(parent, dom_con->elementReceiver());
if (destination == 0) {
qDebug("SignalSlotEditor::fromUi(): no destination widget called \"%s\"",
dom_con->elementReceiver().toUtf8().constData());
continue;
}
QPoint sp = QPoint(20, 20), tp = QPoint(20, 20);
const DomConnectionHints *dom_hints = dom_con->elementHints();
if (dom_hints != 0) {
QList<DomConnectionHint*> list = dom_hints->elementHint();
foreach (DomConnectionHint *hint, list) {
QString attr_type = hint->attributeType();
QPoint p = QPoint(hint->elementX(), hint->elementY());
if (attr_type == QLatin1String("sourcelabel"))
sp = p;
else if (attr_type == QLatin1String("destinationlabel"))
tp = p;
}
}
SignalSlotConnection *con = new SignalSlotConnection(this);
con->setEndPoint(EndPoint::Source, source, sp);
con->setEndPoint(EndPoint::Target, destination, tp);
con->setSignal(dom_con->elementSignal());
con->setSlot(dom_con->elementSlot());
addConnection(con);
}
}
static bool skipWidget(const QWidget *w)
{
const QString name = QLatin1String(w->metaObject()->className());
if (name == QLatin1String("QDesignerWidget"))
return true;
if (name == QLatin1String("QLayoutWidget"))
return true;
if (name == QLatin1String("qdesigner_internal::FormWindow"))
return true;
if (name == QLatin1String("Spacer"))
return true;
return false;
}
QWidget *SignalSlotEditor::widgetAt(const QPoint &pos) const
{
QWidget *widget = ConnectionEdit::widgetAt(pos);
if (widget == m_form_window->mainContainer())
return widget;
for (; widget != 0; widget = widget->parentWidget()) {
QDesignerMetaDataBaseItemInterface *item = m_form_window->core()->metaDataBase()->item(widget);
if (item == 0)
continue;
if (skipWidget(widget))
continue;
break;
}
return widget;
}
void SignalSlotEditor::setSignal(SignalSlotConnection *con, const QString &member)
{
if (member == con->signal())
return;
m_form_window->beginCommand(QApplication::translate("Command", "Change signal"));
undoStack()->push(new SetMemberCommand(con, EndPoint::Source, member, this));
if (!signalMatchesSlot(m_form_window->core(), member, con->slot()))
undoStack()->push(new SetMemberCommand(con, EndPoint::Target, QString(), this));
m_form_window->endCommand();
}
void SignalSlotEditor::setSlot(SignalSlotConnection *con, const QString &member)
{
if (member == con->slot())
return;
m_form_window->beginCommand(QApplication::translate("Command", "Change slot"));
undoStack()->push(new SetMemberCommand(con, EndPoint::Target, member, this));
if (!signalMatchesSlot(m_form_window->core(), con->signal(), member))
undoStack()->push(new SetMemberCommand(con, EndPoint::Source, QString(), this));
m_form_window->endCommand();
}
void SignalSlotEditor::setSource(Connection *_con, const QString &obj_name)
{
SignalSlotConnection *con = static_cast<SignalSlotConnection*>(_con);
if (con->sender() == obj_name)
return;
m_form_window->beginCommand(QApplication::translate("Command", "Change sender"));
ConnectionEdit::setSource(con, obj_name);
QObject *sourceObject = con->object(EndPoint::Source);
if (!memberFunctionListContains(m_form_window->core(), sourceObject, SignalMember, con->signal()))
undoStack()->push(new SetMemberCommand(con, EndPoint::Source, QString(), this));
m_form_window->endCommand();
}
void SignalSlotEditor::setTarget(Connection *_con, const QString &obj_name)
{
SignalSlotConnection *con = static_cast<SignalSlotConnection*>(_con);
if (con->receiver() == obj_name)
return;
m_form_window->beginCommand(QApplication::translate("Command", "Change receiver"));
ConnectionEdit::setTarget(con, obj_name);
QObject *targetObject = con->object(EndPoint::Target);
if (!memberFunctionListContains(m_form_window->core(), targetObject, SlotMember, con->slot()))
undoStack()->push(new SetMemberCommand(con, EndPoint::Target, QString(), this));
m_form_window->endCommand();
}
void SignalSlotEditor::addEmptyConnection()
{
SignalSlotConnection *con = new SignalSlotConnection(this);
undoStack()->push(new AddConnectionCommand(this, con));
}
} // namespace qdesigner_internal
QT_END_NAMESPACE
|