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** This file is part of the Qt Designer of the Qt Toolkit.
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** 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
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/

#include "signalsloteditor_plugin.h"
#include "signalsloteditor_tool.h"

#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerFormWindowManagerInterface>

#include <QtGui/QAction>

QT_BEGIN_NAMESPACE

using namespace qdesigner_internal;

SignalSlotEditorPlugin::SignalSlotEditorPlugin()
    : m_initialized(false), m_action(0)
{
}

SignalSlotEditorPlugin::~SignalSlotEditorPlugin()
{
}

bool SignalSlotEditorPlugin::isInitialized() const
{
    return m_initialized;
}

void SignalSlotEditorPlugin::initialize(QDesignerFormEditorInterface *core)
{
    Q_ASSERT(!isInitialized());

    m_action = new QAction(tr("Edit Signals/Slots"), this);
    m_action->setObjectName(QLatin1String("__qt_edit_signals_slots_action"));
    m_action->setShortcut(tr("F4"));
    QIcon icon = QIcon::fromTheme("designer-edit-signals",
                                  QIcon(core->resourceLocation() + QLatin1String("/signalslottool.png")));
    m_action->setIcon(icon);
    m_action->setEnabled(false);

    setParent(core);
    m_core = core;
    m_initialized = true;

    connect(core->formWindowManager(), SIGNAL(formWindowAdded(QDesignerFormWindowInterface*)),
            this, SLOT(addFormWindow(QDesignerFormWindowInterface*)));

    connect(core->formWindowManager(), SIGNAL(formWindowRemoved(QDesignerFormWindowInterface*)),
            this, SLOT(removeFormWindow(QDesignerFormWindowInterface*)));

    connect(core->formWindowManager(), SIGNAL(activeFormWindowChanged(QDesignerFormWindowInterface*)),
                this, SLOT(activeFormWindowChanged(QDesignerFormWindowInterface*)));
}

QDesignerFormEditorInterface *SignalSlotEditorPlugin::core() const
{
    return m_core;
}

void SignalSlotEditorPlugin::addFormWindow(QDesignerFormWindowInterface *formWindow)
{
    Q_ASSERT(formWindow != 0);
    Q_ASSERT(m_tools.contains(formWindow) == false);

    SignalSlotEditorTool *tool = new SignalSlotEditorTool(formWindow, this);
    connect(m_action, SIGNAL(triggered()), tool->action(), SLOT(trigger()));
    m_tools[formWindow] = tool;
    formWindow->registerTool(tool);
}

void SignalSlotEditorPlugin::removeFormWindow(QDesignerFormWindowInterface *formWindow)
{
    Q_ASSERT(formWindow != 0);
    Q_ASSERT(m_tools.contains(formWindow) == true);

    SignalSlotEditorTool *tool = m_tools.value(formWindow);
    m_tools.remove(formWindow);
    disconnect(m_action, SIGNAL(triggered()), tool->action(), SLOT(trigger()));
    // ### FIXME disable the tool

    delete tool;
}

QAction *SignalSlotEditorPlugin::action() const
{
    return m_action;
}

void SignalSlotEditorPlugin::activeFormWindowChanged(QDesignerFormWindowInterface *formWindow)
{
    m_action->setEnabled(formWindow != 0);
}

QT_END_NAMESPACE