UBToolWidget.cpp 7.69 KB
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/*
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 * Copyright (C) 2015-2018 Département de l'Instruction Publique (DIP-SEM)
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 *
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 * Copyright (C) 2013 Open Education Foundation
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 *
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 * Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
 * l'Education Numérique en Afrique (GIP ENA)
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 *
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 * This file is part of OpenBoard.
 *
 * OpenBoard is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License,
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 * with a specific linking exception for the OpenSSL project's
 * "OpenSSL" library (or with modified versions of it that use the
 * same license as the "OpenSSL" library).
 *
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 * OpenBoard is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
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 */
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#include <QtGui>
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#include <QWebView>
#include <QWebFrame>

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#include "UBToolWidget.h"
#include "api/UBWidgetUniboardAPI.h"
#include "api/UBW3CWidgetAPI.h"
#include "board/UBBoardController.h"
#include "board/UBBoardView.h"
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#include "core/UBApplication.h"
#include "core/UBSettings.h"
#include "domain/UBGraphicsScene.h"
#include "domain/UBGraphicsWidgetItem.h"
#include "frameworks/UBPlatformUtils.h"
#include "frameworks/UBFileSystemUtils.h"
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#include "core/memcheck.h"

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QPixmap* UBToolWidget::sClosePixmap = 0;
QPixmap* UBToolWidget::sUnpinPixmap = 0;


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UBToolWidget::UBToolWidget(const QUrl& pUrl, QWidget *pParent)
    : QWidget(pParent, Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint)
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    , mWebView(0)
    , mToolWidget(0)
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    , mShouldMoveWidget(false)
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    , mContentMargin(0)
    , mFrameWidth(0)
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{
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    int widgetType = UBGraphicsWidgetItem::widgetType(pUrl);
    if (widgetType == UBWidgetType::Apple)
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        mToolWidget = new UBGraphicsAppleWidgetItem(pUrl);
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    else if (widgetType == UBWidgetType::W3C)
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        mToolWidget = new UBGraphicsW3CWidgetItem(pUrl);
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    else
        qDebug() << "UBToolWidget::UBToolWidget: Unknown widget Type";

    initialize();
}

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UBToolWidget::UBToolWidget(UBGraphicsWidgetItem *pWidget, QWidget *pParent)
    : QWidget(pParent, Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint)
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    , mWebView(0)
    , mToolWidget(pWidget)
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    , mShouldMoveWidget(false)
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    , mContentMargin(0)
    , mFrameWidth(0)
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{
    initialize();
    javaScriptWindowObjectCleared();
}

UBToolWidget::~UBToolWidget()
{
    // NOOP
}

void UBToolWidget::initialize()
{
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    if (!sClosePixmap)
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        sClosePixmap = new QPixmap(":/images/close.svg");

    if(!sUnpinPixmap)
        sUnpinPixmap = new QPixmap(":/images/unpin.svg");
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    UBGraphicsScene *wscene = dynamic_cast<UBGraphicsScene *>(mToolWidget->scene());
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    if (wscene)
    {
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        wscene->removeItemFromDeletion(mToolWidget);
        wscene->removeItem(mToolWidget);
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    }

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    mWebView = new QWebView(this);

    QPalette palette = mWebView->page()->palette();
    palette.setBrush(QPalette::Base, QBrush(Qt::transparent));
    mWebView->page()->setPalette(palette);


    mWebView->installEventFilter(this);
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    mFrameWidth = UBSettings::settings()->objectFrameWidth;
    mContentMargin = sClosePixmap->width() / 2 + mFrameWidth;
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    setLayout(new QVBoxLayout());
    layout()->setContentsMargins(mContentMargin, mContentMargin, mContentMargin, mContentMargin);
    layout()->addWidget(mWebView);
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    setFixedSize(mToolWidget->boundingRect().width() + mContentMargin * 2, mToolWidget->boundingRect().height() + mContentMargin * 2);
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    connect(mWebView->page()->mainFrame(), &QWebFrame::javaScriptWindowObjectCleared,
            this, &UBToolWidget::javaScriptWindowObjectCleared);
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    mWebView->load(mToolWidget->mainHtml());
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    mWebView->setAcceptDrops(false);
    mWebView->settings()->setAttribute(QWebSettings::PluginsEnabled, true);
    mWebView->setAttribute(Qt::WA_OpaquePaintEvent, false);

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    connect(UBApplication::boardController, SIGNAL(activeSceneChanged()), this, SLOT(javaScriptWindowObjectCleared()));
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}

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bool UBToolWidget::eventFilter(QObject *obj, QEvent *event)
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{
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    if (mShouldMoveWidget && obj == mWebView && event->type() == QEvent::MouseMove)
    {
        QMouseEvent *mouseMoveEvent = static_cast<QMouseEvent*>(event);

        if (mouseMoveEvent->buttons() & Qt::LeftButton)
        {
            move(pos() - mMousePressPos + mWebView->mapTo(this, mouseMoveEvent->pos()));

            event->accept();
            return true;
        }
    }

    // standard event processing
    return QObject::eventFilter(obj, event);
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}

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void UBToolWidget::mousePressEvent(QMouseEvent *event)
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{
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    QWidget::mousePressEvent(event);
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    /* did webkit consume the mouse press ? */
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    mShouldMoveWidget = !event->isAccepted() && (event->buttons() & Qt::LeftButton);
    mMousePressPos = event->pos();
    event->accept();
    update();
}

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void UBToolWidget::mouseMoveEvent(QMouseEvent *event)
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{
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    if(mShouldMoveWidget && (event->buttons() & Qt::LeftButton)) {
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        move(pos() - mMousePressPos + event->pos());
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        event->accept();
    }
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    QWidget::mouseMoveEvent(event);
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}

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void UBToolWidget::mouseReleaseEvent(QMouseEvent *event)
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{
    mShouldMoveWidget = false;

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    if (event->pos().x() >= 0 && event->pos().x() < sClosePixmap->width() && event->pos().y() >= 0 && event->pos().y() < sClosePixmap->height()) {
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        UBApplication::boardController->removeTool(this);
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        event->accept();
    }
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    else if (mToolWidget->canBeContent() && event->pos().x() >= mContentMargin && event->pos().x() < mContentMargin + sUnpinPixmap->width() && event->pos().y() >= 0 && event->pos().y() < sUnpinPixmap->height()) {
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        UBApplication::boardController->moveToolWidgetToScene(this);
        event->accept();
    }
    else
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        QWidget::mouseReleaseEvent(event); /* don't propgate to parent, the widget is deleted in UBApplication */
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}

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void UBToolWidget::paintEvent(QPaintEvent *event)
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{
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    QWidget::paintEvent(event);

    //if (isActiveWindow())
    {
        QPainter painter(this);
        painter.setRenderHint(QPainter::Antialiasing);
        painter.setPen(Qt::NoPen);
        painter.setBrush(QColor(127, 127, 127, 127));

        painter.drawRoundedRect(QRectF(sClosePixmap->width() / 2
                                     , sClosePixmap->height() / 2
                                     , width() - sClosePixmap->width()
                                     , mFrameWidth)
                                     , mFrameWidth / 2
                                     , mFrameWidth / 2);

        painter.drawPixmap(0, 0, *sClosePixmap);

        if (mToolWidget->canBeContent())
            painter.drawPixmap(mContentMargin, 0, *sUnpinPixmap);
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    }
}

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void UBToolWidget::javaScriptWindowObjectCleared()
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{
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    UBWidgetUniboardAPI *uniboardAPI = new UBWidgetUniboardAPI(UBApplication::boardController->activeScene(), mToolWidget);
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    mWebView->page()->mainFrame()->addToJavaScriptWindowObject("sankore", uniboardAPI);
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    UBGraphicsW3CWidgetItem *graphicsW3cWidgetItem = dynamic_cast<UBGraphicsW3CWidgetItem*>(mToolWidget);
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    if (graphicsW3cWidgetItem)
    {
        UBW3CWidgetAPI* widgetAPI = new UBW3CWidgetAPI(graphicsW3cWidgetItem);
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        mWebView->page()->mainFrame()->addToJavaScriptWindowObject("widget", widgetAPI);
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    }
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}

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UBGraphicsWidgetItem* UBToolWidget::toolWidget() const
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{
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    return mToolWidget;
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}
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QPoint UBToolWidget::naturalCenter() const
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{
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    if (mWebView)
        return mWebView->geometry().center();
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    else
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        return QPoint(0, 0);
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}

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void UBToolWidget::remove()
{
    mToolWidget = NULL;
    hide();
    deleteLater();
}

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void UBToolWidget::centerOn(const QPoint& pos)
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{
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    QWidget::move(pos - QPoint(width() / 2, height() / 2));
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}