MainWindow setReadAhead added

Tableview we now try to read ahead in timerEvent..
the TodoView interface needs an update on this matter too...
besides that I'm quite happy with the speed and go on to implement new
features

4 files changed, 60 insertions, 2 deletions

diff --git a/core/pim/todo/mainwindow.cpp b/core/pim/todo/mainwindow.cpp
index 2994915..a6d657c 100644
--- a/core/pim/todo/mainwindow.cpp
+++ b/core/pim/todo/mainwindow.cpp
@@ -584,96 +584,100 @@ void MainWindow::slotFlush() {
 }
 void MainWindow::slotShowDetails() {
     slotShow( currentView()->current() );
 }
 /*
  * populate the Categories
  * Menu
  */
 void MainWindow::populateCategories() {
     m_todoMgr.load();
 
     m_catMenu->clear();
     int id, rememberId;
     id = 1;
     rememberId = 1;
 
     m_catMenu->insertItem( tr( "All Categories" ), id++ );
     m_catMenu->insertSeparator();
     QStringList categories = m_todoMgr.categories();
     categories.append( tr( "Unfiled" ) );
     for ( QStringList::Iterator it = categories.begin();
 	  it != categories.end(); ++it ) {
 	m_catMenu->insertItem( *it, id );
 	if ( *it == currentCategory() )
 	    rememberId = id;
 	++id;
     }
     setCategory( rememberId );
 }
 bool MainWindow::showCompleted()const {
     return m_completed;
 }
 bool MainWindow::showDeadline()const {
     return m_deadline;
 }
 QString MainWindow::currentCategory()const {
     return m_curCat;
 }
 int MainWindow::currentCatId() {
     return m_todoMgr.catId( m_curCat );
 }
 ViewBase* MainWindow::currentView() {
     return m_curView;
 }
 void MainWindow::raiseCurrentView() {
     m_stack->raiseWidget( m_curView->widget() );
 }
 void MainWindow::slotShowDue(bool ov) {
     m_overdue = ov;
     currentView()->showOverDue( ov );
     raiseCurrentView();
 }
 void MainWindow::slotShow( int uid ) {
     qWarning("slotShow");
     currentShow()->slotShow( event( uid ) );
     m_stack->raiseWidget( currentShow()->widget() );
 }
 void MainWindow::slotEdit( int uid ) {
     if(m_syncing) {
 	QMessageBox::warning(this, tr("Todo"),
 			     tr("Can not edit data, currently syncing"));
 	return;
     }
 
     OTodo todo = m_todoMgr.event( uid );
 
     todo = currentEditor()->edit(this, todo );
 
     /* if completed */
     if ( currentEditor()->accepted() ) {
         qWarning("Replacing now" );
         m_todoMgr.update( todo.uid(), todo );
 	currentView()->replaceEvent( todo );
         /* a Category might have changed */
         populateCategories();
     }
 
     raiseCurrentView();
 }
 /*
 void MainWindow::slotUpdate1( int uid, const SmallTodo& ev) {
     m_todoMgr.update( uid, ev );
 }
 */
 void MainWindow::updateTodo(  const OTodo& ev) {
     m_todoMgr.update( ev.uid() , ev );
 }
 /* The view changed it's configuration
  * update the view menu
  */
 void MainWindow::slotUpdate3( QWidget* ) {
 
 }
 void MainWindow::updateList() {
     m_todoMgr.updateList();
 }
+void MainWindow::setReadAhead( uint count ) {
+    if (m_todoMgr.todoDB() )
+        m_todoMgr.todoDB()->setReadAhead( count );
+}
diff --git a/core/pim/todo/mainwindow.h b/core/pim/todo/mainwindow.h
index 8d0c29f..5a18e64 100644
--- a/core/pim/todo/mainwindow.h
+++ b/core/pim/todo/mainwindow.h
@@ -1,176 +1,177 @@
 /*
                =.            This file is part of the OPIE Project
              .=l.            Copyright (c)  2002 Holger Freyther <zecke@handhelds.org>
            .>+-=
  _;:,     .>    :=|.         This program is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or  modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This program is distributed in the hope that
      +  .  -:.       =       it will be useful,  but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
 ..}^=.=       =       ;      Library General Public License for more
 ++=   -.     .`     .:       details.
  :     =  ...= . :.=-
  -.   .:....=;==+<;          You should have received a copy of the GNU
   -_. . .   )=.  =           Library General Public License along with
     --        :-=`           this library; see the file COPYING.LIB.
                              If not, write to the Free Software Foundation,
                              Inc., 59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #ifndef TODO_MAIN_WINDOW_H
 #define TODO_MAIN_WINDOW_H
 
 #include <qlist.h>
 #include <qmainwindow.h>
 
 #include <opie/otodoaccess.h>
 #include <opie/otodo.h>
 
 #include "smalltodo.h"
 #include "todoview.h"
 #include "todomanager.h"
 
 class QPopupMenu;
 class QMenuBar;
 class QToolBar;
 class QAction;
 class QWidgetStack;
 class Ir;
 
 
 namespace Todo {
     typedef TodoView View;
     class TemplateManager;
     class Editor;
     class TodoShow;
     class TemplateEditor;
 
     class MainWindow : public QMainWindow {
         Q_OBJECT
     public:
         MainWindow( QWidget *parent = 0,
                     const char* name = 0 );
         ~MainWindow();
 
         /** return a context menu for an OTodo */
         QPopupMenu* contextMenu(int uid );
         QPopupMenu* options();
         QPopupMenu* edit();
         QPopupMenu* view();
         QToolBar*   toolbar();
 
 
         void updateList();
         OTodoAccess::List list()const;
         OTodoAccess::List sorted( bool asc, int sortOrder );
         OTodoAccess::List sorted( bool asc, int sortOrder, int addFilter );
 
         OTodo event(int uid );
 
         bool isSyncing()const;
         bool showCompleted()const;
         bool showDeadline()const;
         bool showOverDue()const;
         QString currentCategory()const;
         int currentCatId();
         TemplateManager* templateManager();
 
         void updateTodo( const OTodo& );
         void populateTemplates();
         Editor* currentEditor();
+        void setReadAhead(uint count );
 private slots:
         void populateCategories();
         void slotReload();
         void slotFlush();
 
     protected:
         void closeEvent( QCloseEvent* e );
 
     private:
         void receiveFile( const QString& filename );
         void connectBase( ViewBase* );
         void initUI();
         void initActions();
         void initConfig();
         void initViews();
         void initEditor();
         void initShow();
         void initTemplate();
         void raiseCurrentView();
         ViewBase* currentView();
         ViewBase* m_curView;
         Editor* m_curEdit;
         TodoShow* currentShow();
         TodoShow* m_curShow;
         TemplateEditor* currentTemplateEditor();
         TemplateEditor* m_curTempEd;
 
         QMenuBar* m_bar;
         QToolBar* m_tool;
         QAction* m_editAction,
             *m_deleteAction,
             *m_findAction,
             *m_completedAction,
             *m_showDeadLineAction,
             *m_deleteAllAction,
             *m_deleteCompleteAction,
             *m_duplicateAction,
             *m_showOverDueAction,
             *m_effectiveAction;
         QWidgetStack *m_stack;
         QPopupMenu* m_catMenu,
             *m_edit,
             *m_options,
             *m_view,
             *m_template;
 
         bool m_syncing:1;
         bool m_deadline:1;
         bool m_completed:1;
         bool m_overdue:1;
         TodoManager m_todoMgr;
         QString m_curCat;
         QList<ViewBase> m_views;
         uint m_counter;
         TemplateManager* m_tempManager;
 
      private slots:
         void slotShow(int);
         void slotEdit(int);
 private slots:
         void slotUpdate3( QWidget* );
         void slotNewFromTemplate(int id );
         void slotNew();
         void slotDuplicate();
         void slotDelete();
         void slotDeleteAll();
         void slotDeleteCompleted();
 
         void slotEdit();
         void slotFind();
 
         void setCategory( int );
 
         void slotShowDeadLine( bool );
         void slotShowCompleted( bool );
 
         void setDocument( const QString& );
 
 
         void slotBeam();
         void beamDone( Ir* );
         void slotShowDetails();
         void slotShowDue( bool );
     };
 };
 
 #endif
diff --git a/core/pim/todo/tableview.cpp b/core/pim/todo/tableview.cpp
index 5d82eb2..f4b898f 100644
--- a/core/pim/todo/tableview.cpp
+++ b/core/pim/todo/tableview.cpp
@@ -33,368 +33,418 @@
 #include "mainwindow.h"
 //#include "tableitems.h"
 #include "tableview.h"
 
 using namespace Todo;
 
 namespace {
     static const int BoxSize = 14;
     static const int RowHeight = 20;
 }
 
 
 TableView::TableView( MainWindow* window, QWidget* wid )
     : QTable(  wid ), TodoView( window ) {
     setUpdatesEnabled( false );
     viewport()->setUpdatesEnabled( false );
     m_enablePaint = false;
     setNumRows(0);
     setNumCols(4);
 
     setSorting( TRUE );
     setSelectionMode( NoSelection );
     setColumnStretchable( 2, TRUE );
     setColumnWidth(0, 20 );
     setColumnWidth(1, 35 );
 
     setLeftMargin( 0 );
     verticalHeader()->hide();
 
     horizontalHeader()->setLabel(0, tr("C.") );
     horizontalHeader()->setLabel(1, tr("Prior.") );
     horizontalHeader()->setLabel(2, tr("Description" ) );
 
     setColumnStretchable(3, FALSE );
     setColumnWidth(3, 20 );
     horizontalHeader()->setLabel(3, tr("Deadline") );
 
     if ( todoWindow()->showDeadline() )
         showColumn( 3);
     else
         hideColumn(3 );
 
     connect((QTable*)this, SIGNAL( clicked( int, int, int, const QPoint& ) ),
             this, SLOT( slotClicked(int, int, int, const QPoint& ) ) );
     connect((QTable*)this, SIGNAL( pressed( int, int, int, const QPoint& ) ),
             this, SLOT( slotPressed(int, int, int, const QPoint& ) ) );
     connect((QTable*)this, SIGNAL(valueChanged(int, int) ),
             this, SLOT( slotValueChanged(int, int) ) );
     connect((QTable*)this, SIGNAL(currentChanged(int, int) ),
             this, SLOT( slotCurrentChanged(int, int) ) );
 
     m_menuTimer = new QTimer( this );
     connect( m_menuTimer, SIGNAL(timeout()),
              this, SLOT(slotShowMenu()) );
 
     m_enablePaint = true;
     setUpdatesEnabled( true );
     viewport()->setUpdatesEnabled( true );
     viewport()->update();
     setSortOrder( 0 );
     setAscending( TRUE );
     m_first = true;
 }
 /* a new day has started
  * update the day
  */
 void TableView::newDay() {
     clear();
     updateView();
 }
 TableView::~TableView() {
 
 }
 void TableView::slotShowMenu() {
     QPopupMenu *menu = todoWindow()->contextMenu( current() );
     menu->exec(QCursor::pos() );
     delete menu;
 }
 QString TableView::type() const {
     return QString::fromLatin1( tr("Table View") );
 }
 int TableView::current() {
     int uid = sorted().uidAt(currentRow() );
     qWarning("uid %d", uid );
     return uid;
 }
 QString TableView::currentRepresentation() {
     return text( currentRow(), 2);
 }
 /* show overdue */
 void TableView::showOverDue( bool ) {
     clear();
     updateView();
 }
 
 void TableView::updateView( ) {
+    m_row = false;
+    startTimer( 2000 );
+    /* FIXME we want one page to be read!
+     *
+     * Calculate that screensize
+     */
+    todoWindow()->setReadAhead( 4 );
     sort();
     OTodoAccess::List::Iterator it, end;
     it = sorted().begin();
     end = sorted().end();
 
     qWarning("setTodos");
     QTime time;
     time.start();
     m_enablePaint = false;
     setUpdatesEnabled( false );
     viewport()->setUpdatesEnabled( false );
 
     QTime t;
     t.start();
     setNumRows( it.count() );
     int elc = time.elapsed();
     qWarning("Adding took %d", elc/1000 );
     setUpdatesEnabled( true );
     viewport()->setUpdatesEnabled( true );
     viewport()->update();
 
     m_enablePaint = true;
     int el = time.elapsed();
     qWarning("adding took %d", el/1000 );
 }
 void TableView::setTodo( int, const OTodo&) {
     sort();
 
     /* repaint */
     QTable::update();
 }
 void TableView::addEvent( const OTodo&) {
     sort();
 
-    QTable::update();
+    /* fix problems of not showing the 'Haken' */
+    QTable::repaint();
 }
 /*
  * find the event
  * and then replace the complete row
  */
 void TableView::replaceEvent( const OTodo& ev) {
     addEvent( ev );
 }
 /*
  * re aligning table can be slow too
  * FIXME: look what performs better
  * either this or the old align table
  */
 void TableView::removeEvent( int ) {
     updateView();
 }
 void TableView::setShowCompleted( bool b) {
     qWarning("Show Completed %d" + b );
     updateView();
 }
 void TableView::setShowDeadline( bool b) {
     qWarning("Show DeadLine %d" + b );
     if (b)
         showColumn(3 );
     else
         hideColumn(3 );
 }
 void TableView::setShowCategory( const QString& str) {
     qWarning("setShowCategory");
     if ( str != m_oleCat || m_first )
         updateView();
 
     m_oleCat = str;
     m_first = false;
 
 }
 void TableView::clear() {
     setNumRows(0);
 }
 void TableView::slotClicked(int row, int col, int,
                             const QPoint& point) {
     if ( !cellGeometry(row, col ).contains(point ) )
         return;
 
     int ui= sorted().uidAt( row );
 
 
     switch( col ) {
     case 0:{
          int x = point.x() -columnPos( col );
          int y = point.y() -rowPos( row );
          int w = columnWidth( col );
          int h = rowHeight( row );
          if ( x >= ( w - BoxSize ) / 2 &&
               x <= ( w - BoxSize ) / 2 + BoxSize &&
               y >= ( h - BoxSize ) / 2 &&
               y <= ( h - BoxSize ) / 2 + BoxSize ) {
              OTodo todo = sorted()[row];
              todo.setCompleted( !todo.isCompleted() );
              TodoView::update( todo.uid(), todo );
              updateView();
          }
     }
         break;
 
     case 1:
         break;
 
     case 2: {
         m_menuTimer->stop();
         showTodo( ui );
         break;
     }
     case 3: {
         m_menuTimer->stop();
         TodoView::edit( ui );
         break;
     }
     }
 
 
 }
 void TableView::slotPressed(int row, int col, int,
                             const QPoint& point) {
 
     /* TextColumn column */
     if ( col == 2 && cellGeometry( row, col ).contains( point ) )
         m_menuTimer->start( 750, TRUE );
 }
 void TableView::slotValueChanged( int, int ) {
     qWarning("Value Changed");
 }
 void TableView::slotCurrentChanged(int, int ) {
     m_menuTimer->stop();
 }
 QWidget* TableView::widget() {
     return this;
 }
 /*
  * We need to overwrite sortColumn
  * because we want to sort whole row
  * based
  * We event want to set the setOrder
  * to a sort() and update()
  */
 void TableView::sortColumn( int col, bool asc, bool ) {
     qWarning("bool %d", asc );
     setSortOrder( col );
     setAscending( asc );
     updateView();
 }
 void TableView::viewportPaintEvent( QPaintEvent* e) {
     qWarning("Paint event" );
     if (m_enablePaint )
         QTable::viewportPaintEvent( e );
 }
 /*
  * This segment is copyrighted by TT
  * it was taken from their todolist
  * application this code is GPL
  */
 void TableView::paintCell(QPainter* p,  int row, int col, const QRect& cr, bool ) {
     const QColorGroup &cg = colorGroup();
 
     p->save();
 
     OTodo task = sorted()[row];
 
     p->fillRect( 0, 0, cr.width(), cr.height(), cg.brush( QColorGroup::Base ) );
 
     QPen op = p->pen();
     p->setPen(cg.mid());
     p->drawLine( 0, cr.height() - 1, cr.width() - 1, cr.height() - 1 );
     p->drawLine( cr.width() - 1, 0, cr.width() - 1, cr.height() - 1 );
     p->setPen(op);
 
     QFont f = p->font();
     QFontMetrics fm(f);
 
     switch(col) {
 	case 0:
 	    {
 		// completed field
 		int marg = ( cr.width() - BoxSize ) / 2;
 		int x = 0;
 		int y = ( cr.height() - BoxSize ) / 2;
 		p->setPen( QPen( cg.text() ) );
 		p->drawRect( x + marg, y, BoxSize, BoxSize );
 		p->drawRect( x + marg+1, y+1, BoxSize-2, BoxSize-2 );
 		p->setPen( darkGreen );
 		x += 1;
 		y += 1;
 		if ( task.isCompleted() ) {
 		    QPointArray a( 9*2 );
 		    int i, xx, yy;
 		    xx = x+2+marg;
 		    yy = y+4;
 		    for ( i=0; i<4; i++ ) {
 			a.setPoint( 2*i,   xx, yy );
 			a.setPoint( 2*i+1, xx, yy+2 );
 			xx++; yy++;
 		    }
 		    yy -= 2;
 		    for ( i=4; i<9; i++ ) {
 			a.setPoint( 2*i,   xx, yy );
 			a.setPoint( 2*i+1, xx, yy+2 );
 			xx++; yy--;
 		    }
 		    p->drawLineSegments( a );
 		}
 	    }
 	    break;
 	case 1:
 	    // priority field
 	    {
 		QString text = QString::number(task.priority());
 		p->drawText(2,2 + fm.ascent(), text);
 	    }
 	    break;
 	case 2:
 	    // description field
 	    {
 		QString text = task.summary().isEmpty() ?
                                task.description() :
                                task.summary();
 		p->drawText(2,2 + fm.ascent(), text);
 	    }
 	    break;
 	case 3:
 	    {
 		QString text;
 		if (task.hasDueDate()) {
-		    text = "HAS";
+		    int off = QDate::currentDate().daysTo( task.dueDate() );
+                    text = QString::number(off) + tr(" day(s)");
+                    /*
+                     * set color if not completed
+                     */
+                    if (!task.isCompleted() ) {
+                        QColor color = Qt::black;
+                        if ( off < 0 )
+                            color = Qt::red;
+                        else if ( off == 0 )
+                            color = Qt::yellow;
+                        else if ( off > 0 )
+                            color = Qt::green;
+                        p->setPen(color  );
+                    }
 		} else {
 		    text = tr("None");
 		}
 		p->drawText(2,2 + fm.ascent(), text);
 	    }
 	    break;
     }
     p->restore();
 }
 QWidget* TableView::createEditor(int row, int col, bool )const {
     switch( col ) {
     case 1: {
         /* the priority stuff */
         QComboBox* combo = new QComboBox( viewport() );
         combo->insertItem( "1" );
         combo->insertItem( "2" );
         combo->insertItem( "3" );
         combo->insertItem( "4" );
         combo->insertItem( "5" );
         combo->setCurrentItem( sorted()[row].priority()-1 );
         return combo;
     }
     case 0:
     default:
         return 0l;
     }
 }
 void TableView::setCellContentFromEditor(int row, int col ) {
     if ( col == 1 ) {
         QWidget* wid = cellWidget(row, 1 );
         if ( wid->inherits("QComboBox") ) {
             int pri = ((QComboBox*)wid)->currentItem() + 1;
             OTodo todo = sorted()[row];
             if ( todo.priority() != pri ) {
                 todo.setPriority( pri  );
                 TodoView::update( todo.uid(), todo );
                 updateView();
             }
         }
     }
 }
 void TableView::slotPriority() {
     setCellContentFromEditor( currentRow(), currentColumn() );
 }
+/*
+ * We'll use the TimerEvent to read ahead or to keep the cahce always
+ * filled enough.
+ * We will try to read ahead 4 items in both ways
+ * up and down. On odd or even we will currentRow()+-4 or +-9
+ *
+ */
+void TableView::timerEvent( QTimerEvent* ev ) {
+    int row = currentRow();
+    qWarning("TimerEvent %d", row);
+    if ( m_row ) {
+        int ro = row-4;
+        if (ro < 0 ) ro = 0;
+        sorted()[ro];
+
+        ro = row+4;
+        sorted()[ro];
+    } else {
+        int ro = row + 8;
+        sorted()[ro];
+
+        ro = row-8;
+        if (ro < 0 ) ro = 0;
+        sorted()[ro];
+    }
+
+    m_row = !m_row;
+}
diff --git a/core/pim/todo/tableview.h b/core/pim/todo/tableview.h
index bf41aea..fe65ca9 100644
--- a/core/pim/todo/tableview.h
+++ b/core/pim/todo/tableview.h
@@ -1,100 +1,103 @@
 /*
                =.            This file is part of the OPIE Project
              .=l.            Copyright (c)  2002 <>
            .>+-=
  _;:,     .>    :=|.         This program is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or  modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This program is distributed in the hope that
      +  .  -:.       =       it will be useful,  but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
 ..}^=.=       =       ;      Library General Public License for more
 ++=   -.     .`     .:       details.
  :     =  ...= . :.=-
  -.   .:....=;==+<;          You should have received a copy of the GNU
   -_. . .   )=.  =           Library General Public License along with
     --        :-=`           this library; see the file COPYING.LIB.
                              If not, write to the Free Software Foundation,
                              Inc., 59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #ifndef OPIE_TABLE_VIEW_H
 #define OPIE_TABLE_VIEW_H
 
 #include <qtable.h>
 #include <qmap.h>
 
 #include "tableitems.h"
 #include "todoview.h"
 
 class QTimer;
 
 namespace Todo {
     class CheckItem;
     class DueTextItem;
     class TableView : public QTable, public TodoView {
         Q_OBJECT
     public:
         TableView( MainWindow*, QWidget* parent );
         ~TableView();
 
 
         QString type()const;
         int current();
         QString currentRepresentation();
 
         void clear();
         void showOverDue( bool );
         void updateView();
         void setTodo( int uid, const OTodo& );
         void addEvent( const OTodo& event );
         void replaceEvent( const OTodo& );
         void removeEvent( int uid );
         void setShowCompleted( bool );
         void setShowDeadline( bool );
 
         void setShowCategory(const QString& =QString::null );
         void newDay();
         QWidget* widget();
         void sortColumn(int, bool, bool );
 
         /*
          * we do our drawing ourselves
          * because we don't want to have
          * 40.000 QTableItems for 10.000
          * OTodos where we only show 10 at a time!
          */
         void paintCell(QPainter* p, int row, int col,  const QRect&, bool );
     private:
         /* reimplented for internal reasons */
         void viewportPaintEvent( QPaintEvent* );
         QTimer *m_menuTimer;
         bool m_enablePaint:1;
         QString m_oleCat;
         bool m_first : 1;
 
     protected:
+        void timerEvent( QTimerEvent* e );
         QWidget* createEditor(int row, int col, bool initFromCell )const;
         void setCellContentFromEditor( int row, int col );
 
 private slots:
         void slotShowMenu();
         void slotClicked(int, int, int,
                          const QPoint& );
         void slotPressed(int, int, int,
                          const QPoint& );
         void slotValueChanged(int, int);
         void slotCurrentChanged(int, int );
         void slotPriority();
+    private:
+        bool m_row : 1;
     };
 };
 
 #endif