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browsertabproxy.cpp Example File
demos/browser/browsertabproxy.cpp

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 #include "browsertabproxy.h"

 #include "browsermainwindow.h"
 #include "webview.h"

 #include <QtCore/QSignalMapper>

 #include <QtGui/QAction>
 #include <QtGui/QStatusBar>

 #define INITIALIZE_WEB_ACTION(slotName, actionName, webAction) \
     m_webActionConnections.append(WebActionConnection(slotName, &m_mainWindow->actionName, webAction));

 BrowserTabProxy::BrowserTabProxy(BrowserMainWindow* mainWindow)
     : QObject(mainWindow)
     , m_mainWindow(mainWindow)
     , m_mapper(0)
 {
 }

 void BrowserTabProxy::init()
 {
     if (m_mapper)
         return;

     m_mapper = new QSignalMapper(this);
     QObject::connect(m_mapper, SIGNAL(mapped(int)), this, SLOT(slotUpdateAction(int)));

     INITIALIZE_WEB_ACTION(SLOT(slotUndo()), m_undo, QWebPage::Undo)
     INITIALIZE_WEB_ACTION(SLOT(slotRedo()), m_redo, QWebPage::Redo)
     INITIALIZE_WEB_ACTION(SLOT(slotCut()), m_cut, QWebPage::Cut)
     INITIALIZE_WEB_ACTION(SLOT(slotCopy()), m_copy, QWebPage::Copy)
     INITIALIZE_WEB_ACTION(SLOT(slotPaste()), m_paste, QWebPage::Paste)
     INITIALIZE_WEB_ACTION(SLOT(slotStop()), m_stop, QWebPage::Stop)
     INITIALIZE_WEB_ACTION(SLOT(slotReload()), m_reload, QWebPage::Reload)
     INITIALIZE_WEB_ACTION(SLOT(slotRedo()), m_reload, QWebPage::Redo)
     INITIALIZE_WEB_ACTION(SLOT(slotBack()), m_historyBack, QWebPage::Back)
     INITIALIZE_WEB_ACTION(SLOT(slotForward()), m_historyForward, QWebPage::Forward);
 }

 /*
  * Three steps to victory
  *  1.) forget about the past
  *  2.) prepare for the future
  *  3.) update the GUI
  */
 void BrowserTabProxy::setTab(WebView *newTab)
 {
     init();
     disconnect(m_currentTab);
     connect(newTab);
     update(newTab);
     m_currentTab = newTab;
     if (m_currentTab)
         m_currentTab->setFocus();
 }

 void BrowserTabProxy::updateAction(int index, WebView* tab)
 {
     init();
     QAction* source = tab->page()->action(m_webActionConnections[index].webAction);

     (*m_webActionConnections[index].action)->setChecked(source->isChecked());
     (*m_webActionConnections[index].action)->setEnabled(source->isEnabled());
     (*m_webActionConnections[index].action)->setVisible(source->isVisible());
 }

 void BrowserTabProxy::slotUpdateAction(int index)
 {
     updateAction(index, m_currentTab);
 }

 void BrowserTabProxy::disconnect(WebView* oldTab)
 {
     Q_ASSERT(oldTab == m_currentTab);
     if (!oldTab)
         return;

     m_currentTab->disconnect(m_mainWindow, SLOT(slotLoadStarted()));
     m_currentTab->disconnect(m_mainWindow, SLOT(slotLoadFinished()));
     m_currentTab->disconnect(m_mainWindow, SLOT(slotUpdateWindowTitle(const QString&)));
     m_currentTab->disconnect(m_mainWindow->statusBar(), SLOT(showMessage(const QString&)));
     m_currentTab->disconnect(m_mainWindow, SLOT(slotUrlChanged(const QUrl &)));
     m_currentTab->page()->disconnect(this, SIGNAL(linkHovered(const QString&)));

     for (int i = 0; i < m_webActionConnections.size(); ++i) {
         QAction* action = oldTab->page()->action(m_webActionConnections[i].webAction);
         action->disconnect(m_mainWindow);
         m_mapper->removeMappings(action);
     }
 }

 void BrowserTabProxy::connect(WebView* newTab)
 {
     if (!newTab) {
         m_mainWindow->slotUpdateWindowTitle(QString());
         return;
     }

     for (int i = 0; i < m_webActionConnections.size(); ++i) {
         QAction* action = newTab->page()->action(m_webActionConnections[i].webAction);
         QObject::connect(action, SIGNAL(triggered(bool)), m_mainWindow, m_webActionConnections[i].slot);
         QObject::connect(action, SIGNAL(changed()), m_mapper, SLOT(map()));
         m_mapper->setMapping(action, i);
         updateAction(i, newTab);
     }

     QObject::connect(newTab, SIGNAL(statusBarMessage(const QString&)),
                      m_mainWindow->statusBar(), SLOT(showMessage(const QString&)));
     QObject::connect(newTab, SIGNAL(titleChanged(const QString&)),
                      m_mainWindow, SLOT(slotUpdateWindowTitle(const QString&)));
     QObject::connect(newTab, SIGNAL(loadStarted()),
                      m_mainWindow, SLOT(slotLoadStarted()));
     QObject::connect(newTab, SIGNAL(loadFinished()),
                      m_mainWindow, SLOT(slotLoadFinished()));
     QObject::connect(newTab, SIGNAL(urlChanged(const QUrl &)),
                      m_mainWindow, SLOT(slotUrlChanged(const QUrl &)));
     QObject::connect(newTab->page(), SIGNAL(linkHovered(const QString&, const QString&, const QString&)),
                      this, SIGNAL(linkHovered(const QString&)));
 }

 void BrowserTabProxy::update(WebView* newTab)
 {
     if (!newTab)
         return;

     m_mainWindow->replaceCurrentUrl(newTab->url());
     m_mainWindow->statusBar()->showMessage(newTab->lastStausBarText());
     m_mainWindow->slotUpdateWindowTitle(newTab->title());
     newTab->loadIsFinished() ?
         m_mainWindow->slotLoadFinished() :
         m_mainWindow->slotLoadStarted();
 }

 BrowserTabProxy::WebActionConnection::WebActionConnection(const char* _slot, QAction** _action, QWebPage::WebAction _webAction)
     : slot(_slot)
     , action(_action)
     , webAction(_webAction)
 {}


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Qt 4.4.0-beta1