Refactored gesture api

Rewritten the api almost from scratch, making it simplier and more
flexible at the same time.

The current implementation will not have complex gseturemanager class
inside Qt, but the QGesture base class, which represents both a
gesture recognizer and a gesture itself with a set of properties. A
set of common gestures that can use used in third-party applications
(and in Qt itself internally) is supposed to be found in
qstandardgestures.h, and a base class for user-defined gestures is in
qgesture.h

Gesture implementation for Pan on Windows7 has also been added as a
reference implementation for platform gestures.

1 files changed, 0 insertions, 363 deletions

diff --git a/examples/gestures/browser/webview.cpp b/examples/gestures/browser/webview.cpp
deleted file mode 100644
index e50872f..0000000
--- a/examples/gestures/browser/webview.cpp
+++ /dev/null
@@ -1,363 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** No Commercial Usage
-** This file contains pre-release code and may not be distributed.
-** You may use this file in accordance with the terms and conditions
-** contained in the either Technology Preview License Agreement or the
-** Beta Release License Agreement.
-**
-** 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 http://www.qtsoftware.com/contact.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#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/QGesture>
-#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 &paramNames, const QStringList &paramValues)
-{
-    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());
-}