Add an Example showing the udage of QCOP, PIM API and

some other nice parts

1 files changed, 445 insertions, 0 deletions

diff --git a/examples/simple-pim/simple.cpp b/examples/simple-pim/simple.cpp
new file mode 100644
index 0000000..3e9fcd3
--- a/dev/null
+++ b/examples/simple-pim/simple.cpp
@@ -0,0 +1,445 @@
+#include <qaction.h> // action
+#include <qmenubar.h> // menubar
+#include <qtoolbar.h> // toolbar
+#include <qlabel.h> // a label
+#include <qpushbutton.h> // the header file for the QPushButton
+#include <qlayout.h>
+#include <qtimer.h> // we use it for the singleShot
+#include <qdatetime.h> // for QDate
+#include <qtextview.h> // a rich text widget
+#include <qdialog.h>
+#include <qwhatsthis.h> // for whats this
+
+#include <qpe/qpeapplication.h> // the QPEApplication
+#include <qpe/resource.h>
+#include <qpe/sound.h>
+#include <qpe/qcopenvelope_qws.h>
+#include <qpe/datebookmonth.h>
+#include <qpe/timestring.h>
+
+#include <opie/oapplicationfactory.h> // a template + macro to save the main method and allow quick launching
+#include <opie/otabwidget.h>
+#include <opie/owait.h>
+
+#include "simple.h"
+
+/*
+ * implementation of simple
+ */
+
+/*
+ * The factory is used for quicklaunching
+ * It needs a constructor ( c'tor ) with at least QWidget, const char* and WFlags as parameter and a static QString appName() matching the TARGET of the .pro
+ *
+ * Depending on the global quick launch setting this will create
+ * either a main method or one for our component plugin system
+ */
+
+OPIE_EXPORT_APP( OApplicationFactory<MainWindow> )
+
+MainWindow::MainWindow(QWidget *parent,  const char* name, WFlags fl )
+    : QMainWindow( parent, name, fl ) {
+    setCaption(tr("My MainWindow") );
+
+    m_desktopChannel = 0;
+    m_loading = 0;
+
+    initUI();
+
+
+    /*
+     * Tab widget as central
+     */
+    m_tab = new OTabWidget(this);
+
+    setCentralWidget( m_tab );
+
+    m_todoView = new PIMListView(m_tab, "Todo view" );
+    m_tab->addTab( m_todoView,"todo/TodoList", tr("Todos") );
+
+    m_dateView = new PIMListView(m_tab, "Datebook view" );
+    m_tab->addTab( m_dateView, "datebook/DateBook", tr("Events") );
+
+    /* now connect the actions */
+    /*
+     * we connect the activated to our show
+     * and on activation we will show a detailed
+     * summary of the record
+     */
+    connect(m_fire, SIGNAL(activated() ),
+            this, SLOT(slotShow() ) );
+
+    /*
+     * We will change the date
+     */
+    connect(m_dateAction, SIGNAL(activated() ),
+            this, SLOT(slotDate() ) );
+
+    /*
+     * connect the show signal of the PIMListView
+     * to a slot to show a dialog
+     */
+    connect(m_todoView, SIGNAL(showRecord(const OPimRecord& ) ),
+            this, SLOT(slotShowRecord(const OPimRecord& ) ) );
+    connect(m_dateView, SIGNAL(showRecord(const OPimRecord& ) ),
+            this, SLOT(slotShowRecord(const OPimRecord& ) ) );
+
+    /*
+     * Now comes the important lines of code for this example
+     * We do not directly call load but delay loading until
+     * all Events are dispatches and handled.
+     * SO we will load once our window is mapped to screen
+     * to achieve that we use a QTimer::singleShot
+     * After 10 milli seconds the timer fires and on TimerEvent
+     * out slot slotLoad will be called
+     * Remember this a Constructor to construct your object and not
+     * to load
+     */
+    QTimer::singleShot( 10, this, SLOT(slotLoad() ) );
+}
+
+MainWindow::~MainWindow() {
+    // again nothing to delete because Qt takes care
+}
+
+
+void MainWindow::setDocument( const QString& /*str*/ ) {
+}
+
+
+void MainWindow::initUI() {
+
+    setToolBarsMovable( false );
+
+    QToolBar *menuBarHolder = new QToolBar( this );
+
+    menuBarHolder->setHorizontalStretchable( true );
+    QMenuBar *mb = new QMenuBar( menuBarHolder );
+    QToolBar *tb = new QToolBar( this );
+
+    QPopupMenu *fileMenu = new QPopupMenu( this );
+
+
+    QAction *a = new QAction( tr("Quit"), Resource::loadIconSet("quit_icon"),
+                              QString::null, 0, this, "quit_action" );
+    /*
+     * Connect quit to the QApplication quit slot
+     */
+    connect(a, SIGNAL(activated() ),
+            qApp, SLOT(quit() ) );
+    a->addTo( fileMenu );
+
+    a =  new QAction(tr("View Current"),
+                     Resource::loadIconSet("zoom"),
+                     QString::null, 0, this, "view current");
+    /* a simple whats this online explanation of out button */
+    a->setWhatsThis(tr("Views the current record")  );
+    /* or QWhatsThis::add(widget, "description" ); */
+
+    /* see  the power? */
+    a->addTo( fileMenu );
+    a->addTo( tb );
+    m_fire = a;
+
+    a = new QAction(tr("Choose Date"),
+                    Resource::loadIconSet("day"),
+                    QString::null, 0, this, "choose date" );
+    a->addTo( fileMenu );
+    a->addTo( tb );
+    m_dateAction = a;
+
+    mb->insertItem(tr("File"), fileMenu );
+
+}
+
+void MainWindow::slotLoad() {
+    /*
+     * There is no real shared access in the PIM API
+     * It wasn't finish cause of health problems of one
+     * of the authors so we do something fancy and use QCOP
+     * the IPC system to get a current copy
+     */
+    /* NOTES to QCOP: QCOP operates over channels and use QDataStream
+     * to send data. You can check if a channel isRegistered or hook
+     * yourself to that channel. A Channel is QCString and normally
+     * prefix with QPE/ and then the system in example QPE/System,
+     * QPE/Desktop a special channel is the application channel
+     * it QPE/Application/appname this channel gets created on app
+     * startup by QPEApplication. QCOP is asynchronous
+     *
+     * To send you'll use QCopEnevelope
+     *
+     */
+    /*
+     * What we will do is first is get to know if either
+     * datebook or todolist are running if so we will kindly
+     * asked to save the data for us.
+     * If neither are running we can load directly
+     */
+    if (!QCopChannel::isRegistered("QPE/Application/todolist") &&
+        !QCopChannel::isRegistered("QPE/Application/datebook") ) {
+        m_db.load();
+        m_tb.load();
+        return slotLoadForDay( QDate::currentDate() );
+    }
+
+    /*
+     * prepare our answer machine the QCopChannel
+     * QPE/Desktop will send "flushDone(QString)" when
+     * the flush is done it emits a signal on receive
+     */
+    m_desktopChannel = new QCopChannel("QPE/Desktop");
+    connect(m_desktopChannel, SIGNAL(received(const QCString&, const QByteArray& ) ),
+            this, SLOT(slotDesktopReceive(const QCString&, const QByteArray& ) ) );
+    /* the numberof synced channels will be set to zero */
+    m_synced = 0;
+
+    /*
+     * We use {} around the QCopEnvelope because it sends its
+     * data on destruction of QCopEnvelope with
+     */
+    /* check again  if not present increment synced*/
+    if ( QCopChannel::isRegistered("QPE/Application/todolist") ) {
+        QCopEnvelope env("QPE/Application/todolist", "flush()" );
+        // env << data; but we do not have any parameters here
+    }else
+        m_synced++;
+
+    if ( QCopChannel::isRegistered("QPE/Application/datebook") ) {
+        QCopEnvelope env("QPE/Application/datebook", "flush()" );
+    }else
+        m_synced++;
+
+    /* we will provide a wait scrren */
+    m_loading = new OWait(this, "wait screen" );
+}
+
+void MainWindow::slotDesktopReceive(const QCString& cmd, const QByteArray& data ) {
+    /* the bytearray was filled with the QDataStream now
+     * we open it read only to get the value(s)
+     */
+    QDataStream stream(data, IO_ReadOnly );
+    /*
+     * we're only interested in the flushDone
+     */
+    if ( cmd == "flushDone(QString)" ) {
+        QString appname;
+        stream >> appname; // get the first argument out of stream
+        if (appname == QString::fromLatin1("datebook") ||
+            appname == QString::fromLatin1("todolist") )
+            m_synced++;
+    }
+
+    /*
+     * If we synced both we can go ahead
+     * In future this is not needed anymore when we finally
+     * implemented X-Ref and other PIM features
+     */
+    if (m_synced >= 2 ) {
+        delete m_loading;
+        delete m_desktopChannel;
+        /* now we finally can start doing the actual loading */
+        m_tb.load();
+        m_db.load();
+        {
+            /* tell the applications to reload */
+            QCopEnvelope("QPE/Application/todolist", "reload()");
+            QCopEnvelope("QPE/Application/datebook", "reload()");
+        }
+        slotLoadForDay( QDate::currentDate() );
+    }
+
+}
+
+/* overloaded member for shortcoming of libqpe */
+void MainWindow::slotLoadForDay(int y, int m, int d) {
+    /* year,month, day */
+    slotLoadForDay( QDate(y, m, d ) );
+}
+
+void MainWindow::slotLoadForDay(const QDate& date) {
+
+
+    /* all todos for today including the ones without dueDate */
+    m_todoView->set( m_tb.effectiveToDos(date, date ) );
+    m_dateView->set( m_db.effectiveEvents( date, date ) );
+}
+
+/* we want to show the current record */
+void MainWindow::slotShow() {
+    /* we only added PIMListViews so we can safely cast */
+    PIMListView *view = static_cast<PIMListView*>(m_tab->currentWidget() );
+
+    /* ask the view to send a signal */
+    view->showCurrentRecord();
+
+}
+
+/* as answer this slot will be called */
+void MainWindow::slotShowRecord( const OPimRecord& rec) {
+    /* got a parent but still is a toplevel MODAL dialog */
+    QDialog* dia = new QDialog(this,"dialog",TRUE );
+    QVBoxLayout *box = new QVBoxLayout( dia );
+    dia->setCaption( tr("View Record") );
+
+
+    QTextView *view = new QTextView(dia );
+    view->setText( rec.toRichText() );
+    box->addWidget( view );
+    /*
+     * execute via QPEApplication
+     * this allows QPEApplication to make a sane decision
+     * on the size
+     */
+    dia->showMaximized();
+    QPEApplication::execDialog( dia );
+    delete dia;
+}
+
+
+void MainWindow::slotDate() {
+    /*
+     * called by the action we will show a Popup
+     * at the current mouse position with a DateChooser
+     * to select the day
+     */
+    qWarning("slot Date");
+    QPopupMenu *menu = new QPopupMenu();
+    /* A Month to select a date from TRUE for auto close */
+    DateBookMonth *month = new DateBookMonth(menu, 0, true );
+    connect(month, SIGNAL(dateClicked(int, int, int) ),
+            this, SLOT(slotLoadForDay(int, int, int) ) );
+
+    menu->insertItem( month );
+
+    menu->exec( QCursor::pos() );
+
+    /*
+     * we do not need to delete month because
+     * we delete its parent menu
+     */
+
+    delete menu;
+}
+
+/*
+ * An anonymous namespace this symbol is only available here
+ * so truely private
+ */
+namespace {
+    /* not static cause namespace does that what static would do */
+    const int RTTI = 5050;
+    /*
+     * every ListView got Items. we've special pim items
+     * holding ownership and the pointer to a pim record
+     * it can't hold a pimrecord directly because this
+     * would introduce slicing... any break
+     */
+    /*
+     * A struct is a special class. Everything is public by
+     * default.
+     */
+    struct PIMListViewItem : public QListViewItem {
+        /*
+         *currently no hierachies are planed for the example
+         * so only one constructor with a QListView as parent
+         */
+        PIMListViewItem( QListView*, OPimRecord* record );
+        ~PIMListViewItem();
+
+        /* used by the QListViewItem to easily allow identifiying of different
+         * items. Values greater than 1000 should be used */
+        int rtti()const;
+        OPimRecord* record()const;
+
+    private:
+        OPimRecord* m_record;
+    };
+
+    PIMListViewItem::PIMListViewItem( QListView *p, OPimRecord* rec )
+        : QListViewItem(p), m_record( rec ) {
+    }
+
+    PIMListViewItem::~PIMListViewItem() {
+        /* we've the onwership so we need to delete it */
+        delete m_record;
+    }
+
+    OPimRecord* PIMListViewItem::record()const {
+        return m_record;
+    }
+
+}
+
+
+PIMListView::PIMListView( QWidget* widget, const char* name, WFlags fl  )
+    : QListView(widget, name, fl )
+{
+    addColumn("Summary");
+}
+
+PIMListView::~PIMListView() {
+
+}
+
+void PIMListView::set( OTodoAccess::List list ) {
+    /* clear first and then add new items */
+    clear();
+
+    OTodoAccess::List::Iterator it;
+    for (it = list.begin(); it != list.end(); ++it ) {
+        /*
+         * make a new item which automatically gets added to the listview
+         * and call the copy c'tor to create a new OTodo
+         */
+        PIMListViewItem *i = new PIMListViewItem(this, new OTodo( *it ) );
+        i->setText(0, (*it).summary() );
+    }
+}
+
+void PIMListView::set( const OEffectiveEvent::ValueList& lst ) {
+    /* clear first and then add items */
+    clear();
+
+    OEffectiveEvent::ValueList::ConstIterator it;
+    for ( it = lst.begin(); it != lst.end(); ++it ) {
+        PIMListViewItem *i = new PIMListViewItem(this, new OEvent( (*it).event() ) );
+        i->setText( 0, PIMListView::makeString( (*it) ) );
+    }
+
+}
+
+void PIMListView::showCurrentRecord() {
+    /* it could be possible that their is no currentItem */
+    if (!currentItem() )
+        return;
+
+    /*
+     * we only add PIMListViewItems so it is save
+     * to do this case. If this would not be the case
+     * use rtti() to check in a switch() case
+     */
+    PIMListViewItem *item = static_cast<PIMListViewItem*>( currentItem() );
+
+    /* finally you see how to emit a signal */
+    emit showRecord( (*item->record() ) );
+}
+
+QString PIMListView::makeString( const OEffectiveEvent& ev ) {
+    QString str;
+    str += ev.description();
+    if ( !ev.event().isAllDay() ) {
+        if ( ev.startDate() != ev.endDate() ) {
+            str += tr("Start ") + TimeString::timeString( ev.event().startDateTime().time() );
+            str += " - " + TimeString::longDateString( ev.startDate() );
+            str +=  tr("End ") + TimeString::timeString( ev.event().endDateTime().time() );
+            str += " - " + TimeString::longDateString( ev.endDate() );
+        }else{
+            str += tr("Time ") + TimeString::timeString( ev.startTime() );
+            str += " - " + TimeString::timeString( ev.endTime() );
+        }
+    }else
+        str += tr(" This is an All-Day Event");
+
+    return str;
+}