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Diffstat (limited to 'examples/gestures/browser/webview.cpp')
| -rw-r--r-- | examples/gestures/browser/webview.cpp | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/examples/gestures/browser/webview.cpp b/examples/gestures/browser/webview.cpp new file mode 100644 index 0000000..2eee119 --- /dev/null +++ b/examples/gestures/browser/webview.cpp @@ -0,0 +1,362 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the $MODULE$ of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial Usage +** Licensees holding valid Qt Commercial licenses may use this file in +** accordance with the Qt Commercial License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Nokia. +** +** GNU Lesser General Public License Usage +** Alternatively, 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "browserapplication.h" +#include "browsermainwindow.h" +#include "cookiejar.h" +#include "downloadmanager.h" +#include "networkaccessmanager.h" +#include "tabwidget.h" +#include "webview.h" + +#include <QtGui/QClipboard> +#include <QtGui/QMenu> +#include <QtGui/QMessageBox> +#include <QtGui/QMouseEvent> + +#include <QtWebKit/QWebHitTestResult> + +#include <QtUiTools/QUiLoader> + +#include <QtCore/QDebug> +#include <QtCore/QBuffer> + +WebPage::WebPage(QObject *parent) + : QWebPage(parent) + , m_keyboardModifiers(Qt::NoModifier) + , m_pressedButtons(Qt::NoButton) + , m_openInNewTab(false) +{ + setNetworkAccessManager(BrowserApplication::networkAccessManager()); + connect(this, SIGNAL(unsupportedContent(QNetworkReply *)), + this, SLOT(handleUnsupportedContent(QNetworkReply *))); +} + +BrowserMainWindow *WebPage::mainWindow() +{ + QObject *w = this->parent(); + while (w) { + if (BrowserMainWindow *mw = qobject_cast<BrowserMainWindow*>(w)) + return mw; + w = w->parent(); + } + return BrowserApplication::instance()->mainWindow(); +} + +bool WebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type) +{ + // ctrl open in new tab + // ctrl-shift open in new tab and select + // ctrl-alt open in new window + if (type == QWebPage::NavigationTypeLinkClicked + && (m_keyboardModifiers & Qt::ControlModifier + || m_pressedButtons == Qt::MidButton)) { + bool newWindow = (m_keyboardModifiers & Qt::AltModifier); + WebView *webView; + if (newWindow) { + BrowserApplication::instance()->newMainWindow(); + BrowserMainWindow *newMainWindow = BrowserApplication::instance()->mainWindow(); + webView = newMainWindow->currentTab(); + newMainWindow->raise(); + newMainWindow->activateWindow(); + webView->setFocus(); + } else { + bool selectNewTab = (m_keyboardModifiers & Qt::ShiftModifier); + webView = mainWindow()->tabWidget()->newTab(selectNewTab); + } + webView->load(request); + m_keyboardModifiers = Qt::NoModifier; + m_pressedButtons = Qt::NoButton; + return false; + } + if (frame == mainFrame()) { + m_loadingUrl = request.url(); + emit loadingUrl(m_loadingUrl); + } + return QWebPage::acceptNavigationRequest(frame, request, type); +} + +QWebPage *WebPage::createWindow(QWebPage::WebWindowType type) +{ + Q_UNUSED(type); + if (m_keyboardModifiers & Qt::ControlModifier || m_pressedButtons == Qt::MidButton) + m_openInNewTab = true; + if (m_openInNewTab) { + m_openInNewTab = false; + return mainWindow()->tabWidget()->newTab()->page(); + } + BrowserApplication::instance()->newMainWindow(); + BrowserMainWindow *mainWindow = BrowserApplication::instance()->mainWindow(); + return mainWindow->currentTab()->page(); +} + +#if !defined(QT_NO_UITOOLS) +QObject *WebPage::createPlugin(const QString &classId, const QUrl &url, const QStringList ¶mNames, const QStringList ¶mValues) +{ + Q_UNUSED(url); + Q_UNUSED(paramNames); + Q_UNUSED(paramValues); + QUiLoader loader; + return loader.createWidget(classId, view()); +} +#endif // !defined(QT_NO_UITOOLS) + +void WebPage::handleUnsupportedContent(QNetworkReply *reply) +{ + if (reply->error() == QNetworkReply::NoError) { + BrowserApplication::downloadManager()->handleUnsupportedContent(reply); + return; + } + + QFile file(QLatin1String(":/notfound.html")); + bool isOpened = file.open(QIODevice::ReadOnly); + Q_ASSERT(isOpened); + QString title = tr("Error loading page: %1").arg(reply->url().toString()); + QString html = QString(QLatin1String(file.readAll())) + .arg(title) + .arg(reply->errorString()) + .arg(reply->url().toString()); + + QBuffer imageBuffer; + imageBuffer.open(QBuffer::ReadWrite); + QIcon icon = view()->style()->standardIcon(QStyle::SP_MessageBoxWarning, 0, view()); + QPixmap pixmap = icon.pixmap(QSize(32,32)); + if (pixmap.save(&imageBuffer, "PNG")) { + html.replace(QLatin1String("IMAGE_BINARY_DATA_HERE"), + QString(QLatin1String(imageBuffer.buffer().toBase64()))); + } + + QList<QWebFrame*> frames; + frames.append(mainFrame()); + while (!frames.isEmpty()) { + QWebFrame *frame = frames.takeFirst(); + if (frame->url() == reply->url()) { + frame->setHtml(html, reply->url()); + return; + } + QList<QWebFrame *> children = frame->childFrames(); + foreach(QWebFrame *frame, children) + frames.append(frame); + } + if (m_loadingUrl == reply->url()) { + mainFrame()->setHtml(html, reply->url()); + } +} + + +WebView::WebView(QWidget* parent) + : QWebView(parent) + , m_progress(0) + , m_page(new WebPage(this)) + , m_currentPanFrame(0) +{ + grabGesture(Qt::PanGesture); + setPage(m_page); + connect(page(), SIGNAL(statusBarMessage(const QString&)), + SLOT(setStatusBarText(const QString&))); + connect(this, SIGNAL(loadProgress(int)), + this, SLOT(setProgress(int))); + connect(this, SIGNAL(loadFinished(bool)), + this, SLOT(loadFinished())); + connect(page(), SIGNAL(loadingUrl(const QUrl&)), + this, SIGNAL(urlChanged(const QUrl &))); + connect(page(), SIGNAL(downloadRequested(const QNetworkRequest &)), + this, SLOT(downloadRequested(const QNetworkRequest &))); + page()->setForwardUnsupportedContent(true); + +} + +void WebView::contextMenuEvent(QContextMenuEvent *event) +{ + QWebHitTestResult r = page()->mainFrame()->hitTestContent(event->pos()); + if (!r.linkUrl().isEmpty()) { + QMenu menu(this); + menu.addAction(pageAction(QWebPage::OpenLinkInNewWindow)); + menu.addAction(tr("Open in New Tab"), this, SLOT(openLinkInNewTab())); + menu.addSeparator(); + menu.addAction(pageAction(QWebPage::DownloadLinkToDisk)); + // Add link to bookmarks... + menu.addSeparator(); + menu.addAction(pageAction(QWebPage::CopyLinkToClipboard)); + if (page()->settings()->testAttribute(QWebSettings::DeveloperExtrasEnabled)) + menu.addAction(pageAction(QWebPage::InspectElement)); + menu.exec(mapToGlobal(event->pos())); + return; + } + QWebView::contextMenuEvent(event); +} + +void WebView::wheelEvent(QWheelEvent *event) +{ + if (QApplication::keyboardModifiers() & Qt::ControlModifier) { + int numDegrees = event->delta() / 8; + int numSteps = numDegrees / 15; + setTextSizeMultiplier(textSizeMultiplier() + numSteps * 0.1); + event->accept(); + return; + } + QWebView::wheelEvent(event); +} + +void WebView::openLinkInNewTab() +{ + m_page->m_openInNewTab = true; + pageAction(QWebPage::OpenLinkInNewWindow)->trigger(); +} + +void WebView::setProgress(int progress) +{ + m_progress = progress; +} + +void WebView::loadFinished() +{ + if (100 != m_progress) { + qWarning() << "Recieved finished signal while progress is still:" << progress() + << "Url:" << url(); + } + m_progress = 0; +} + +void WebView::loadUrl(const QUrl &url) +{ + m_initialUrl = url; + load(url); +} + +QString WebView::lastStatusBarText() const +{ + return m_statusBarText; +} + +QUrl WebView::url() const +{ + QUrl url = QWebView::url(); + if (!url.isEmpty()) + return url; + + return m_initialUrl; +} + +void WebView::mousePressEvent(QMouseEvent *event) +{ + m_page->m_pressedButtons = event->buttons(); + m_page->m_keyboardModifiers = event->modifiers(); + QWebView::mousePressEvent(event); +} + +void WebView::mouseReleaseEvent(QMouseEvent *event) +{ + QWebView::mouseReleaseEvent(event); + if (!event->isAccepted() && (m_page->m_pressedButtons & Qt::MidButton)) { + QUrl url(QApplication::clipboard()->text(QClipboard::Selection)); + if (!url.isEmpty() && url.isValid() && !url.scheme().isEmpty()) { + setUrl(url); + } + } +} + +void WebView::setStatusBarText(const QString &string) +{ + m_statusBarText = string; +} + +void WebView::downloadRequested(const QNetworkRequest &request) +{ + BrowserApplication::downloadManager()->download(request); +} + +bool WebView::event(QEvent *event) +{ + if (event->type() == QEvent::Gesture) + { + gestureEvent(static_cast<QGestureEvent*>(event)); + return true; + } + return QWebView::event(event); +} + +void WebView::gestureEvent(QGestureEvent *event) +{ + if (const QGesture *g = event->gesture(Qt::PanGesture)) { + if (g->state() == Qt::GestureUpdated) { + if (m_currentPanFrame) { + m_panSpeed = g->pos() - g->lastPos(); + m_currentPanFrame->scroll(-m_panSpeed.x(), -m_panSpeed.y()); + } + } else if (g->state() == Qt::GestureStarted) { + startTimer(20); + m_currentPanFrame = 0; + if (QWebFrame *frame = page()->mainFrame()) { + QWebHitTestResult result = frame->hitTestContent(g->startPos()); + if (!result.isNull()) + m_currentPanFrame = result.frame(); + while (m_currentPanFrame && + m_currentPanFrame->scrollBarMinimum(Qt::Vertical) == 0 && + m_currentPanFrame->scrollBarMaximum(Qt::Vertical) == 0 && + m_currentPanFrame->scrollBarMinimum(Qt::Horizontal) == 0 && + m_currentPanFrame->scrollBarMaximum(Qt::Horizontal) == 0) { + m_currentPanFrame = m_currentPanFrame->parentFrame(); + } + } + } else { + } + event->accept(); + } +} + +static QPoint deaccelerate(const QPoint &speed, int a = 1, int max = 64) +{ + int x = qBound(-max, speed.x(), max); + int y = qBound(-max, speed.y(), max); + x = (x == 0) ? x : (x > 0) ? qMax(0, x - a) : qMin(0, x + a); + y = (y == 0) ? y : (y > 0) ? qMax(0, y - a) : qMin(0, y + a); + return QPoint(x, y); +} + +void WebView::timerEvent(QTimerEvent *event) +{ + m_panSpeed = deaccelerate(m_panSpeed); + if (m_panSpeed.isNull()) + killTimer(event->timerId()); + if (m_currentPanFrame) + m_currentPanFrame->scroll(-m_panSpeed.x(), -m_panSpeed.y()); +} |