uavgadgetview.cpp

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>
 */

#include "uavgadgetview.h"
#include "uavgadgetmanager.h"
#include "uavgadgetinstancemanager.h"
#include "iuavgadget.h"
#include "coreimpl.h"
#include "minisplitter.h"
#include <coreplugin/coreconstants.h>
#include <coreplugin/actionmanager/actionmanager.h>

#include <utils/qtcassert.h>
#include <utils/styledbar.h>

#include <QtCore/QDebug>

#include <QApplication>
#include <QComboBox>
#include <QHBoxLayout>
#include <QLabel>
#include <QMouseEvent>
#include <QPainter>
#include <QStyle>
#include <QStyleOption>
#include <QToolButton>
#include <QMenu>
#include <QClipboard>
#include <QListView>

Q_DECLARE_METATYPE(Core::IUAVGadget *)

using namespace Core;
using namespace Core::Internal;

UAVGadgetView::UAVGadgetView(Core::UAVGadgetManager *uavGadgetManager, IUAVGadget *uavGadget,
                             QWidget *parent, bool restoring)
    : QWidget(parent)
    , m_uavGadgetManager(uavGadgetManager)
    , m_uavGadget(uavGadget)
    , m_toolBar(new QWidget(this))
    , m_defaultToolBar(new QComboBox(this))
    , m_uavGadgetList(new QComboBox(this))
    , m_closeButton(new QToolButton(this))
    , m_defaultIndex(0)
    , m_activeLabel(new QLabel)
{

    tl = new QVBoxLayout(this);
    tl->setSpacing(0);
    tl->setMargin(0);
    {
        // Ugly hack to bypass Qt's styling antics regarding combobox flyouts.
        m_uavGadgetList->setView(new QListView(m_uavGadgetList));

        m_uavGadgetList->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        m_uavGadgetList->setMinimumContentsLength(15);
        m_uavGadgetList->setMaxVisibleItems(40);
        m_uavGadgetList->setContextMenuPolicy(Qt::CustomContextMenu);
        UAVGadgetInstanceManager *im = ICore::instance()->uavGadgetInstanceManager();
        QStringList sl = im->classIds();
        int index = 0;
        bool startFromOne = false;
        foreach (QString classId, sl) {
            if (classId == QString("EmptyGadget")) {
                m_defaultIndex = 0;
                startFromOne = true;
                m_uavGadgetList->insertItem(0, im->gadgetName(classId), classId);
                m_uavGadgetList->setItemIcon(0, im->gadgetIcon(classId));
                m_uavGadgetList->insertSeparator(1);
            } else {

                int i = startFromOne ? 1 : 0;
                for (; i < m_uavGadgetList->count(); i++) {
                    if (QString::localeAwareCompare(m_uavGadgetList->itemText(i),
                                                    im->gadgetName(classId))
                        > 0)
                        break;
                }
                m_uavGadgetList->insertItem(i, im->gadgetName(classId), classId);
                m_uavGadgetList->setItemIcon(i, im->gadgetIcon(classId));
            }
            ++index;
        }

        m_defaultToolBar->setSizePolicy(QSizePolicy::MinimumExpanding,
                                        QSizePolicy::MinimumExpanding);
        m_activeToolBar = m_defaultToolBar;

        QHBoxLayout *toolBarLayout = new QHBoxLayout(m_toolBar);
        toolBarLayout->setMargin(0);
        toolBarLayout->setSpacing(0);
        toolBarLayout->addWidget(m_defaultToolBar);

        m_toolBar->setLayout(toolBarLayout);
        m_toolBar->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::MinimumExpanding);

        QWidget *spacerWidget = new QWidget(this);
        spacerWidget->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);

        m_activeLabel->setTextFormat(Qt::RichText);
        m_activeLabel->setText("<font color=#c0392b><b>" + tr("Active") + "</b></font>");

        m_closeButton->setAutoRaise(true);
        m_closeButton->setIcon(QIcon(":/core/images/closebutton.png"));

        m_top = new Utils::StyledBar(this);
        m_top->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);

        QHBoxLayout *toplayout = new QHBoxLayout(m_top);
        toplayout->setSpacing(0);
        toplayout->setMargin(0);
        toplayout->addWidget(m_uavGadgetList);
        toplayout->addWidget(m_toolBar); // Custom toolbar stretches
        toplayout->addWidget(spacerWidget);
        toplayout->addWidget(m_activeLabel);
        toplayout->addWidget(m_closeButton);

        m_top->setLayout(toplayout);
        tl->addWidget(m_top);

        connect(m_uavGadgetList, SIGNAL(activated(int)), this, SLOT(doReplaceGadget(int)));
        connect(m_closeButton, SIGNAL(clicked()), this, SLOT(closeView()), Qt::QueuedConnection);
        connect(m_uavGadgetManager, SIGNAL(currentGadgetChanged(IUAVGadget *)), this,
                SLOT(currentGadgetChanged(IUAVGadget *)));
    }
    if (m_uavGadget) {
        setGadget(m_uavGadget);
    } else {
        if (!restoring) {
            selectionActivated(m_defaultIndex, false);
        }
    }
}

UAVGadgetView::~UAVGadgetView()
{
    removeGadget();
}

bool UAVGadgetView::hasGadget(IUAVGadget *uavGadget) const
{
    return (m_uavGadget == uavGadget);
}

void UAVGadgetView::showToolbar(bool show)
{
    m_top->setHidden(!show);
}

void UAVGadgetView::closeView()
{
    m_uavGadgetManager->closeView(this);
}

void UAVGadgetView::removeGadget()
{
    if (!m_uavGadget)
        return;
    tl->removeWidget(m_uavGadget->widget());

    m_uavGadget->setParent(nullptr);
    m_uavGadget->widget()->setParent(nullptr);
    QWidget *toolBar = m_uavGadget->toolBar();
    if (toolBar != nullptr) {
        if (m_activeToolBar == toolBar) {
            m_activeToolBar = m_defaultToolBar;
            m_activeToolBar->setVisible(true);
        }
        m_toolBar->layout()->removeWidget(toolBar);
        toolBar->setParent(nullptr);
    }
    m_uavGadget = nullptr;
}

IUAVGadget *UAVGadgetView::gadget() const
{
    return m_uavGadget;
}

void UAVGadgetView::setGadget(IUAVGadget *uavGadget)
{
    if (!uavGadget) {
        return;
    }
    removeGadget();
    m_uavGadget = uavGadget;
    tl->addWidget(m_uavGadget->widget());
    m_uavGadget->widget()->setParent(this);
    m_uavGadget->widget()->show();
    int index = indexOfClassId(m_uavGadget->classId());
    Q_ASSERT(index >= 0);
    m_uavGadgetList->setCurrentIndex(index);

    updateToolBar();
}

void UAVGadgetView::updateToolBar()
{
    if (!m_uavGadget)
        return;
    QComboBox *toolBar = m_uavGadget->toolBar();
    if (!toolBar)
        toolBar = m_defaultToolBar;
    if (m_activeToolBar == toolBar)
        return;
    if (toolBar->count() == 0)
        toolBar->hide();

    // Ugly hack to bypass Qt's styling antics regarding combobox flyouts.
    toolBar->setView(new QListView(toolBar));

    m_toolBar->layout()->addWidget(toolBar);
    m_activeToolBar->setVisible(false);
    m_activeToolBar = toolBar;
}

void UAVGadgetView::selectionActivated(int index, bool forceLoadConfiguration)
{
    if (index < 0) // this could happen when called from SplitterOrView::restoreState()
        index = m_defaultIndex;
    QString classId = m_uavGadgetList->itemData(index).toString();
    if (m_uavGadget && (m_uavGadget->classId() == classId))
        return;
    UAVGadgetInstanceManager *im = ICore::instance()->uavGadgetInstanceManager();
    IUAVGadget *gadgetToRemove = m_uavGadget;
    IUAVGadget *gadget = im->createGadget(classId, this, forceLoadConfiguration);

    setGadget(gadget);
    m_uavGadgetManager->setCurrentGadget(gadget);
    im->removeGadget(gadgetToRemove);
}

void UAVGadgetView::doReplaceGadget(int index)
{
    selectionActivated(index, true);
}

int UAVGadgetView::indexOfClassId(QString classId)
{
    return m_uavGadgetList->findData(classId);
}

void UAVGadgetView::currentGadgetChanged(IUAVGadget *gadget)
{
    m_activeLabel->setVisible(m_uavGadget == gadget);
}