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/***************************************************************************
* *
* This file is part of the Fotowall project, *
* http://www.enricoros.com/opensource/fotowall *
* *
* Inspired from Plasma Web Applet <www.kde.org> and Qt LGPL sources *
* Copyright (C) 2009 by Enrico Ros <enrico.ros@gmail.com> *
* *
* 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 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "BrowserItem.h"
#include <QGraphicsSceneResizeEvent>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QWebFrame>
#include <QWebPage>
// this class 'unprotects' QWebPage from BrowserItem
class WebPage : public QWebPage
{
public:
friend class BrowserItem;
WebPage(QObject * parent = 0) : QWebPage(parent) {}
};
/// Little QGraphicsWidget that renders HTML
BrowserItem::BrowserItem(QGraphicsItem * parent)
: QGraphicsWidget(parent)
, m_webPage(new WebPage(this))
, m_readOnly(false)
{
// set the page as transparent and link it
QPalette pal;
#if QT_VERSION < 0x040500
pal.setBrush(QPalette::Window, Qt::transparent);
#else
pal.setBrush(QPalette::Base, Qt::transparent);
#endif
m_webPage->setPalette(pal);
connect(m_webPage, SIGNAL(linkClicked(const QUrl &)), this, SIGNAL(linkClicked(const QUrl &)));
connect(m_webPage, SIGNAL(scrollRequested(int,int,const QRect&)), this, SLOT(slotScrollRequested(int,int,const QRect&)));
connect(m_webPage, SIGNAL(repaintRequested(const QRect&)), this, SLOT(slotUpdateRequested(const QRect&)));
// enable keyboard focus and mouse tracking
setFlag(QGraphicsItem::ItemIsFocusable, true);
setAcceptsHoverEvents(true);
}
void BrowserItem::write(const QString & html, const QUrl & url)
{
m_webPage->mainFrame()->setHtml(html, url);
update();
}
void BrowserItem::browse(const QString & url)
{
m_webPage->mainFrame()->load(QUrl(url));
update();
}
void BrowserItem::historyBack()
{
m_webPage->triggerAction(QWebPage::Back);
}
void BrowserItem::historyForward()
{
m_webPage->triggerAction(QWebPage::Forward);
}
bool BrowserItem::readOnly() const
{
return m_readOnly;
}
void BrowserItem::setReadOnly(bool on)
{
m_readOnly = on;
}
void BrowserItem::resizeEvent(QGraphicsSceneResizeEvent * event)
{
m_webPage->setViewportSize(event->newSize().toSize());
update();
}
void BrowserItem::paint( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * /*widget*/ )
{
painter->setRenderHints(QPainter::TextAntialiasing);
m_webPage->mainFrame()->render(painter, option->exposedRect.toAlignedRect());
}
void BrowserItem::slotScrollRequested(int dx, int dy, const QRect & scrollViewRect)
{
scroll(dx, dy, scrollViewRect);
}
void BrowserItem::slotUpdateRequested(const QRect & rect)
{
update(rect);
}
// utility function for passing events / calling method's base impl
#define PASS2(__orig, __fctn) \
if (m_readOnly) QGraphicsWidget::__fctn(__orig); \
else m_webPage->event(__orig)
#define PASS3(__e, __orig, __fctn) \
if (m_readOnly) QGraphicsWidget::__fctn(__orig); \
else {(__e)->setAccepted(__orig->isAccepted()); m_webPage->event(__e);}
/** Focusing **/
void BrowserItem::focusInEvent(QFocusEvent * event)
{
PASS2(event, focusInEvent);
}
void BrowserItem::focusOutEvent(QFocusEvent * event)
{
PASS2(event, focusOutEvent);
}
/** Keyboard **/
void BrowserItem::keyPressEvent(QKeyEvent * event)
{
PASS2(event, keyPressEvent);
}
void BrowserItem::keyReleaseEvent(QKeyEvent * event)
{
PASS2(event, keyReleaseEvent);
}
void BrowserItem::inputMethodEvent(QInputMethodEvent * event)
{
PASS2(event, inputMethodEvent);
}
QVariant BrowserItem::inputMethodQuery(Qt::InputMethodQuery query) const
{
return m_webPage->inputMethodQuery(query);
}
/** Mouse **/
void BrowserItem::hoverMoveEvent(QGraphicsSceneHoverEvent * event)
{
QMouseEvent e(QEvent::MouseMove, event->pos().toPoint(), event->screenPos(), Qt::NoButton, Qt::NoButton, event->modifiers());
PASS3(&e, event, hoverMoveEvent);
}
void BrowserItem::mouseMoveEvent(QGraphicsSceneMouseEvent * event)
{
QMouseEvent e(QEvent::MouseMove, event->pos().toPoint(), event->screenPos(), event->button(), event->buttons(), event->modifiers());
PASS3(&e, event, mouseMoveEvent);
}
void BrowserItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
{
QMouseEvent e(QEvent::MouseButtonPress, event->pos().toPoint(), event->screenPos(), event->button(), event->buttons(), event->modifiers());
PASS3(&e, event, mousePressEvent);
}
void BrowserItem::mouseReleaseEvent(QGraphicsSceneMouseEvent * event)
{
QMouseEvent e(QEvent::MouseButtonRelease, event->pos().toPoint(), event->screenPos(), event->button(), event->buttons(), event->modifiers());
PASS3(&e, event, mouseReleaseEvent);
}
void BrowserItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent * event)
{
QMouseEvent e(QEvent::MouseButtonDblClick, event->pos().toPoint(), event->screenPos(), event->button(), event->buttons(), event->modifiers());
PASS3(&e, event, mouseDoubleClickEvent);
}
void BrowserItem::contextMenuEvent(QGraphicsSceneContextMenuEvent * event)
{
QContextMenuEvent e((QContextMenuEvent::Reason)event->reason(), event->pos().toPoint(), event->screenPos());
PASS3(&e, event, contextMenuEvent);
}
void BrowserItem::wheelEvent(QGraphicsSceneWheelEvent * event)
{
QWheelEvent e(event->pos().toPoint(), event->screenPos(), event->delta(), event->buttons(), event->modifiers(), event->orientation());
PASS3(&e, event, wheelEvent);
}
/** Drag & Drop **/
void BrowserItem::dragEnterEvent(QGraphicsSceneDragDropEvent * event)
{
QDragEnterEvent e(event->pos().toPoint(), event->dropAction(), event->mimeData(), event->buttons(), event->modifiers());
PASS3(&e, event, dragEnterEvent);
}
void BrowserItem::dragLeaveEvent(QGraphicsSceneDragDropEvent * event)
{
QDragLeaveEvent e;
PASS3(&e, event, dragLeaveEvent);
}
void BrowserItem::dragMoveEvent(QGraphicsSceneDragDropEvent * event)
{
QDragMoveEvent e(event->pos().toPoint(), event->dropAction(), event->mimeData(), event->buttons(), event->modifiers());
PASS3(&e, event, dragMoveEvent);
}
void BrowserItem::dropEvent(QGraphicsSceneDragDropEvent * event)
{
QDropEvent e(event->pos().toPoint(), event->dropAction(), event->mimeData(), event->buttons(), event->modifiers());
PASS3(&e, event, dropEvent);
}
/** some Magic **/
bool BrowserItem::sceneEvent(QEvent * event)
{
// directly dispatch key events (to avoid tab eating in QGraphicsItem)
if (event->type() == QEvent::KeyPress) {
QKeyEvent * ke = static_cast<QKeyEvent *>(event);
if (ke->key() == Qt::Key_Tab) {
m_webPage->focusNextPrevChild(true);
ke->setAccepted(true);
} else if (ke->key() == Qt::Key_Backtab) {
m_webPage->focusNextPrevChild(false);
ke->setAccepted(true);
} else {
ke->setAccepted(false);
keyPressEvent(ke);
}
return true;
}
// unbreak GW
return QGraphicsWidget::sceneEvent(event);
}
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