/*************************************************************************** * Copyright (C) 2004 by Enrico Ros * * Copyright (C) 2004 by Albert Astals Cid * * * * With portions of code from kpdf/kpdf_pagewidget.cc by: * * Copyright (C) 2002 by Wilco Greven * * Copyright (C) 2003 by Christophe Devriese * * * * Copyright (C) 2003 by Laurent Montel * * Copyright (C) 2003 by Dirk Mueller * * Copyright (C) 2004 by James Ots * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * ***************************************************************************/ // qt/kde includes #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include // system includes #include #include // local includes #include "pageview.h" #include "pageviewutils.h" #include "pagepainter.h" #include "core/document.h" #include "core/page.h" #include "core/link.h" #include "core/generator.h" #include "conf/settings.h" #define ROUND(x) (int(x + 0.5)) // definition of searchID for this class #define PAGEVIEW_SEARCH_ID 2 // structure used internally by PageView for data storage class PageViewPrivate { public: // the document, pageviewItems and the 'visible cache' KPDFDocument * document; QValueVector< PageViewItem * > items; QValueList< PageViewItem * > visibleItems; // view layout (columns and continuous in Settings), zoom and mouse PageView::ZoomMode zoomMode; float zoomFactor; PageView::MouseMode mouseMode; QPoint mouseGrabPos; QPoint mousePressPos; int mouseMidStartY; bool mouseOnRect; QRect mouseSelectionRect; QColor selectionRectColor; // type ahead find bool typeAheadActive; QString typeAheadString; QTimer * findTimeoutTimer; // viewport move bool viewportMoveActive; QTime viewportMoveTime; QPoint viewportMoveDest; QTimer * viewportMoveTimer; // auto scroll int scrollIncrement; QTimer * autoScrollTimer; // other stuff QTimer * delayResizeTimer; bool dirtyLayout; bool blockViewport; // prevents changes to viewport bool blockPixmapsRequest; // prevent pixmap requests PageViewMessage * messageWindow; // in pageviewutils.h // actions KToggleAction * aMouseNormal; KToggleAction * aMouseSelect; KToggleAction * aMouseEdit; KSelectAction * aZoom; KToggleAction * aZoomFitWidth; KToggleAction * aZoomFitPage; KToggleAction * aZoomFitText; KToggleAction * aViewTwoPages; KToggleAction * aViewContinuous; KAction * aPrevAction; }; /* PageView. What's in this file? -> quick overview. * Code weight (in rows) and meaning: * 160 - constructor and creating actions plus their connected slots (empty stuff) * 70 - DocumentObserver inherited methodes (important) * 550 - events: mouse, keyboard, drag/drop * 170 - slotRelayoutPages: set contents of the scrollview on continuous/single modes * 100 - zoom: zooming pages in different ways, keeping update the toolbar actions, etc.. * other misc functions: only slotRequestVisiblePixmaps and pickItemOnPoint noticeable, * and many insignificant stuff like this comment :-) */ PageView::PageView( QWidget *parent, KPDFDocument *document ) : QScrollView( parent, "KPDF::pageView", WStaticContents | WNoAutoErase ) { // create and initialize private storage structure d = new PageViewPrivate(); d->document = document; d->zoomMode = ZoomFixed; d->zoomFactor = 1.0; d->mouseMode = MouseNormal; d->mouseMidStartY = -1; d->mouseOnRect = false; d->typeAheadActive = false; d->findTimeoutTimer = 0; d->viewportMoveActive = false; d->viewportMoveTimer = 0; d->scrollIncrement = 0; d->autoScrollTimer = 0; d->delayResizeTimer = 0; d->dirtyLayout = false; d->blockViewport = false; d->blockPixmapsRequest = false; d->messageWindow = new PageViewMessage(this); d->aPrevAction = 0; // widget setup: setup focus, accept drops and track mouse viewport()->setFocusProxy( this ); viewport()->setFocusPolicy( StrongFocus ); //viewport()->setPaletteBackgroundColor( Qt::white ); viewport()->setBackgroundMode( Qt::NoBackground ); setResizePolicy( Manual ); setAcceptDrops( true ); setDragAutoScroll( false ); viewport()->setMouseTracking( true ); // conntect the padding of the viewport to pixmaps requests connect( this, SIGNAL(contentsMoving(int, int)), this, SLOT(slotRequestVisiblePixmaps(int, int)) ); // show initial welcome text d->messageWindow->display( i18n( "Welcome" ), PageViewMessage::Info, 2000 ); // set a corner button to resize the view to the page size // QPushButton * resizeButton = new QPushButton( viewport() ); // resizeButton->setPixmap( SmallIcon("crop") ); // setCornerWidget( resizeButton ); // resizeButton->setEnabled( false ); // connect(...); } PageView::~PageView() { delete d; } void PageView::setupActions( KActionCollection * ac ) { // Zoom actions ( higher scales takes lots of memory! ) d->aZoom = new KSelectAction( i18n( "Zoom" ), "viewmag", 0, this, SLOT( slotZoom() ), ac, "zoom_to" ); d->aZoom->setEditable( true ); updateZoomText(); KStdAction::zoomIn( this, SLOT( slotZoomIn() ), ac, "zoom_in" ); KStdAction::zoomOut( this, SLOT( slotZoomOut() ), ac, "zoom_out" ); d->aZoomFitWidth = new KToggleAction( i18n("Fit to Page &Width"), "viewmagfit", 0, ac, "zoom_fit_width" ); connect( d->aZoomFitWidth, SIGNAL( toggled( bool ) ), SLOT( slotFitToWidthToggled( bool ) ) ); d->aZoomFitPage = new KToggleAction( i18n("Fit to &Page"), "viewmagfit", 0, ac, "zoom_fit_page" ); connect( d->aZoomFitPage, SIGNAL( toggled( bool ) ), SLOT( slotFitToPageToggled( bool ) ) ); d->aZoomFitText = new KToggleAction( i18n("Fit to &Text"), "viewmagfit", 0, ac, "zoom_fit_text" ); connect( d->aZoomFitText, SIGNAL( toggled( bool ) ), SLOT( slotFitToTextToggled( bool ) ) ); // View-Layout actions d->aViewTwoPages = new KToggleAction( i18n("&Two Pages"), "view_left_right", 0, ac, "view_twopages" ); connect( d->aViewTwoPages, SIGNAL( toggled( bool ) ), SLOT( slotTwoPagesToggled( bool ) ) ); d->aViewTwoPages->setChecked( Settings::viewColumns() > 1 ); d->aViewContinuous = new KToggleAction( i18n("&Continuous"), "view_text", 0, ac, "view_continuous" ); connect( d->aViewContinuous, SIGNAL( toggled( bool ) ), SLOT( slotContinuousToggled( bool ) ) ); d->aViewContinuous->setChecked( Settings::viewContinuous() ); // Mouse-Mode actions d->aMouseNormal = new KRadioAction( i18n("&Normal"), "mouse", 0, this, SLOT( slotSetMouseNormal() ), ac, "mouse_drag" ); d->aMouseNormal->setExclusiveGroup( "MouseType" ); d->aMouseNormal->setChecked( true ); KToggleAction * mz = new KRadioAction( i18n("&Zoom Tool"), "viewmag", 0, this, SLOT( slotSetMouseZoom() ), ac, "mouse_zoom" ); mz->setExclusiveGroup( "MouseType" ); d->aMouseSelect = new KRadioAction( i18n("&Select"), "frame_edit", 0, this, SLOT( slotSetMouseSelect() ), ac, "mouse_select" ); d->aMouseSelect->setExclusiveGroup( "MouseType" ); /* d->aMouseEdit = new KRadioAction( i18n("Draw"), "edit", 0, this, SLOT( slotSetMouseDraw() ), ac, "mouse_draw" ); d->aMouseEdit->setExclusiveGroup("MouseType"); d->aMouseEdit->setEnabled( false ); // implement feature before removing this line*/ // Other actions KAction * su = new KAction( i18n("Scroll Up"), 0, this, SLOT( slotScrollUp() ), ac, "view_scroll_up" ); su->setShortcut( "Shift+Up" ); KAction * sd = new KAction( i18n("Scroll Down"), 0, this, SLOT( slotScrollDown() ), ac, "view_scroll_down" ); sd->setShortcut( "Shift+Down" ); } bool PageView::canFitPageWidth() { return d->zoomMode != ZoomFitWidth; } void PageView::fitPageWidth( int /*page*/ ) { d->aZoom->setCurrentItem(0); slotZoom(); } //BEGIN DocumentObserver inherited methods void PageView::notifySetup( const QValueVector< KPDFPage * > & pageSet, bool documentChanged ) { // reuse current pages if nothing new if ( ( pageSet.count() == d->items.count() ) && !documentChanged ) { int count = pageSet.count(); for ( int i = 0; (i < count) && !documentChanged; i++ ) if ( (int)pageSet[i]->number() != d->items[i]->pageNumber() ) documentChanged = true; if ( !documentChanged ) return; } // delete all widgets (one for each page in pageSet) QValueVector< PageViewItem * >::iterator dIt = d->items.begin(), dEnd = d->items.end(); for ( ; dIt != dEnd; ++dIt ) delete *dIt; d->items.clear(); d->visibleItems.clear(); // create children widgets QValueVector< KPDFPage * >::const_iterator setIt = pageSet.begin(), setEnd = pageSet.end(); for ( ; setIt != setEnd; ++setIt ) d->items.push_back( new PageViewItem( *setIt ) ); // invalidate layout so relayout/repaint will happen on next viewport change if ( pageSet.count() > 0 ) d->dirtyLayout = true; else resizeContents( 0, 0 ); // OSD to display pages if ( documentChanged && pageSet.count() > 0 && Settings::showOSD() ) d->messageWindow->display( i18n(" Loaded a one-page document.", " Loaded a %n-page document.", pageSet.count() ), PageViewMessage::Info, 4000 ); } void PageView::notifyViewportChanged( bool smoothMove ) { // if we are the one changing viewport, skip this nofity if ( d->blockViewport ) return; // block setViewport outgoing calls d->blockViewport = true; // find PageViewItem matching the viewport description const DocumentViewport & vp = d->document->viewport(); PageViewItem * item = 0; QValueVector< PageViewItem * >::iterator iIt = d->items.begin(), iEnd = d->items.end(); for ( ; iIt != iEnd; ++iIt ) if ( (*iIt)->pageNumber() == vp.pageNumber ) { item = *iIt; break; } if ( !item ) { kdDebug() << "viewport has no matching item!" << endl; return; } // relayout in "Single Pages" mode or if a relayout is pending d->blockPixmapsRequest = true; if ( !Settings::viewContinuous() || d->dirtyLayout ) slotRelayoutPages(); // restore viewport center or use default {x-center,v-top} alignment const QRect & r = item->geometry(); int newCenterX = r.left(), newCenterY = r.top(); if ( vp.reCenter.enabled ) { newCenterX += (int)( vp.reCenter.normalizedCenterX * (double)r.width() ); newCenterY += (int)( vp.reCenter.normalizedCenterY * (double)r.height() ); } else { newCenterX += r.width() / 2; newCenterY += visibleHeight() / 2 - 10; } // if smooth movement requested, setup parameters and start it if ( smoothMove ) { d->viewportMoveActive = true; d->viewportMoveTime.start(); d->viewportMoveDest.setX( newCenterX ); d->viewportMoveDest.setY( newCenterY ); if ( !d->viewportMoveTimer ) { d->viewportMoveTimer = new QTimer( this ); connect( d->viewportMoveTimer, SIGNAL( timeout() ), this, SLOT( slotMoveViewport() ) ); } d->viewportMoveTimer->start( 25 ); verticalScrollBar()->setEnabled( false ); horizontalScrollBar()->setEnabled( false ); } else center( newCenterX, newCenterY ); d->blockPixmapsRequest = false; // request visible pixmaps in the current viewport and recompute it slotRequestVisiblePixmaps(); // enable setViewport calls d->blockViewport = false; // update zoom text if in a ZoomFit/* zoom mode if ( d->zoomMode != ZoomFixed ) updateZoomText(); // since the page has moved below cursor, update it updateCursor( viewportToContents( mapFromGlobal( QCursor::pos() ) ) ); } void PageView::notifyPageChanged( int pageNumber, int changedFlags ) { // only handle pixmap / highlight changes notifies if ( changedFlags & DocumentObserver::Bookmark ) return; // iterate over visible items: if page(pageNumber) is one of them, repaint it QValueList< PageViewItem * >::iterator iIt = d->visibleItems.begin(), iEnd = d->visibleItems.end(); for ( ; iIt != iEnd; ++iIt ) if ( (*iIt)->pageNumber() == pageNumber ) { // update item's rectangle plus the little outline QRect expandedRect = (*iIt)->geometry(); expandedRect.addCoords( -1, -1, 3, 3 ); updateContents( expandedRect ); // if we were "zoom-dragging" do not overwrite the "zoom-drag" cursor if ( cursor().shape() != Qt::SizeVerCursor ) { // since the page has been regenerated below cursor, update it updateCursor( viewportToContents( mapFromGlobal( QCursor::pos() ) ) ); } break; } } void PageView::notifyContentsCleared( int changedFlags ) { // if pixmaps were cleared, re-ask them if ( changedFlags & DocumentObserver::Pixmap ) slotRequestVisiblePixmaps(); } bool PageView::canUnloadPixmap( int pageNumber ) { // if the item is visible, forbid unloading QValueList< PageViewItem * >::iterator vIt = d->visibleItems.begin(), vEnd = d->visibleItems.end(); for ( ; vIt != vEnd; ++vIt ) if ( (*vIt)->pageNumber() == pageNumber ) return false; // if hidden premit unloading return true; } //END DocumentObserver inherited methods //BEGIN widget events void PageView::viewportPaintEvent( QPaintEvent * pe ) { // create the rect into contents from the clipped screen rect QRect viewportRect = viewport()->rect(); QRect contentsRect = pe->rect().intersect( viewportRect ); contentsRect.moveBy( contentsX(), contentsY() ); if ( !contentsRect.isValid() ) return; // create the screen painter. a pixel painted ar contentsX,contentsY // appears to the top-left corner of the scrollview. QPainter screenPainter( viewport(), true ); screenPainter.translate( -contentsX(), -contentsY() ); // selectionRect is the normalized mouse selection rect QRect selectionRect = d->mouseSelectionRect; if ( !selectionRect.isNull() ) selectionRect = selectionRect.normalize(); // selectionRectInternal without the border QRect selectionRectInternal = selectionRect; selectionRectInternal.addCoords( 1, 1, -1, -1 ); // color for blending QColor selBlendColor = (selectionRect.width() > 8 || selectionRect.height() > 8) ? d->selectionRectColor : Qt::red; // subdivide region into rects QMemArray allRects = pe->region().rects(); uint numRects = allRects.count(); // preprocess rects area to see if it worths or not using subdivision uint summedArea = 0; for ( uint i = 0; i < numRects; i++ ) { const QRect & r = allRects[i]; summedArea += r.width() * r.height(); } // very elementary check: SUMj(Region[j].area) is less than boundingRect.area bool useSubdivision = summedArea < (0.7 * contentsRect.width() * contentsRect.height()); if ( !useSubdivision ) numRects = 1; // iterate over the rects (only one loop if not using subdivision) for ( uint i = 0; i < numRects; i++ ) { if ( useSubdivision ) { // set 'contentsRect' to a part of the sub-divided region contentsRect = allRects[i].normalize().intersect( viewportRect ); contentsRect.moveBy( contentsX(), contentsY() ); if ( !contentsRect.isValid() ) continue; } // note: this check will take care of all things requiring alpha blending (not only selection) bool wantCompositing = !selectionRect.isNull() && contentsRect.intersects( selectionRect ); if ( wantCompositing && Settings::enableCompositing() ) { // create pixmap and open a painter over it (contents{left,top} becomes pixmap {0,0}) QPixmap doubleBuffer( contentsRect.size() ); QPainter pixmapPainter( &doubleBuffer ); pixmapPainter.translate( -contentsRect.left(), -contentsRect.top() ); // 1) Layer 0: paint items and clear bg on unpainted rects paintItems( &pixmapPainter, contentsRect ); // 2) Layer 1: pixmap manipulated areas // 3) Layer 2: paint (blend) transparent selection if ( !selectionRect.isNull() && selectionRect.intersects( contentsRect ) && !selectionRectInternal.contains( contentsRect ) ) { QRect blendRect = selectionRectInternal.intersect( contentsRect ); // skip rectangles covered by the selection's border if ( blendRect.isValid() ) { // grab current pixmap into a new one to colorize contents QPixmap blendedPixmap( blendRect.width(), blendRect.height() ); copyBlt( &blendedPixmap, 0,0, &doubleBuffer, blendRect.left() - contentsRect.left(), blendRect.top() - contentsRect.top(), blendRect.width(), blendRect.height() ); // blend selBlendColor into the background pixmap QImage blendedImage = blendedPixmap.convertToImage(); KImageEffect::blend( selBlendColor.dark(140), blendedImage, 0.2 ); // copy the blended pixmap back to its place pixmapPainter.drawPixmap( blendRect.left(), blendRect.top(), blendedImage ); } // draw border (red if the selection is too small) pixmapPainter.setPen( selBlendColor ); pixmapPainter.drawRect( selectionRect ); } // 4) Layer 3: overlays if ( Settings::debugDrawBoundaries() ) { pixmapPainter.setPen( Qt::blue ); pixmapPainter.drawRect( contentsRect ); } // finish painting and draw contents pixmapPainter.end(); screenPainter.drawPixmap( contentsRect.left(), contentsRect.top(), doubleBuffer ); } else { // 1) Layer 0: paint items and clear bg on unpainted rects paintItems( &screenPainter, contentsRect ); // 2) Layer 1: opaque manipulated ares (filled / contours) // 3) Layer 2: paint opaque selection if ( !selectionRect.isNull() && selectionRect.intersects( contentsRect ) && !selectionRectInternal.contains( contentsRect ) ) { screenPainter.setPen( palette().active().highlight().dark(110) ); screenPainter.drawRect( selectionRect ); } // 4) Layer 3: overlays if ( Settings::debugDrawBoundaries() ) { screenPainter.setPen( Qt::red ); screenPainter.drawRect( contentsRect ); } } } } void PageView::viewportResizeEvent( QResizeEvent * ) { // start a timer that will refresh the pixmap after 0.5s if ( !d->delayResizeTimer ) { d->delayResizeTimer = new QTimer( this ); connect( d->delayResizeTimer, SIGNAL( timeout() ), this, SLOT( slotRelayoutPages() ) ); } d->delayResizeTimer->start( 333, true ); } void PageView::keyPressEvent( QKeyEvent * e ) { e->accept(); // if performing a selection or dyn zooming, disable keys handling if ( !d->mouseSelectionRect.isNull() || d->mouseMidStartY != -1 ) return; // handle 'find as you type' (based on khtml/khtmlview.cpp) if( d->typeAheadActive ) { // backspace: remove a char and search or terminates search if( e->key() == Key_BackSpace ) { if( d->typeAheadString.length() > 1 ) { d->typeAheadString = d->typeAheadString.left( d->typeAheadString.length() - 1 ); bool found = d->document->searchText( PAGEVIEW_SEARCH_ID, d->typeAheadString, true, false, KPDFDocument::NextMatch, true, qRgb( 128, 255, 128 ), true ); QString status = found ? i18n("Text found: \"%1\".") : i18n("Text not found: \"%1\"."); d->messageWindow->display( status.arg(d->typeAheadString.lower()), found ? PageViewMessage::Find : PageViewMessage::Warning, 4000 ); d->findTimeoutTimer->start( 3000, true ); } else { findAheadStop(); d->document->resetSearch( PAGEVIEW_SEARCH_ID ); } } // F3: go to next occurrency else if( e->key() == KStdAccel::findNext() ) { // part doesn't get this key event because of the keyboard grab d->findTimeoutTimer->stop(); // restore normal operation during possible messagebox is displayed releaseKeyboard(); if ( d->document->continueSearch( PAGEVIEW_SEARCH_ID ) ) d->messageWindow->display( i18n("Text found: \"%1\".").arg(d->typeAheadString.lower()), PageViewMessage::Find, 3000 ); d->findTimeoutTimer->start( 3000, true ); grabKeyboard(); } // esc and return: end search else if( e->key() == Key_Escape || e->key() == Key_Return ) { findAheadStop(); } // other key: add to text and search else if( !e->text().isEmpty() ) { d->typeAheadString += e->text(); bool found = d->document->searchText( PAGEVIEW_SEARCH_ID, d->typeAheadString, false, false, KPDFDocument::NextMatch, true, qRgb( 128, 255, 128 ), true ); QString status = found ? i18n("Text found: \"%1\".") : i18n("Text not found: \"%1\"."); d->messageWindow->display( status.arg(d->typeAheadString.lower()), found ? PageViewMessage::Find : PageViewMessage::Warning, 4000 ); d->findTimeoutTimer->start( 3000, true ); } return; } else if( e->key() == '/' && d->document->isOpened() ) { // stop scrolling the page (if doing it) if ( d->autoScrollTimer ) { d->scrollIncrement = 0; d->autoScrollTimer->stop(); } // start type-adeas search d->typeAheadString = QString(); d->messageWindow->display( i18n("Starting -- find text as you type"), PageViewMessage::Find, 3000 ); d->typeAheadActive = true; if ( !d->findTimeoutTimer ) { // create the timer on demand d->findTimeoutTimer = new QTimer( this ); connect( d->findTimeoutTimer, SIGNAL( timeout() ), this, SLOT( findAheadStop() ) ); } d->findTimeoutTimer->start( 3000, true ); grabKeyboard(); return; } // if viewport is moving, disable keys handling if ( d->viewportMoveActive ) return; // move/scroll page by using keys switch ( e->key() ) { case Key_Up: case Key_PageUp: // if in single page mode and at the top of the screen, go to previous page if ( Settings::viewContinuous() || verticalScrollBar()->value() > verticalScrollBar()->minValue() ) { if ( e->key() == Key_Up ) verticalScrollBar()->subtractLine(); else verticalScrollBar()->subtractPage(); } else if ( d->document->currentPage() > 0 ) { // more optimized than document->setPrevPage and then move view to bottom DocumentViewport newViewport = d->document->viewport(); newViewport.pageNumber -= 1; newViewport.reCenter.enabled = true; newViewport.reCenter.normalizedCenterY = 1.0; d->document->setViewport( newViewport ); } break; case Key_Down: case Key_PageDown: // if in single page mode and at the bottom of the screen, go to next page if ( Settings::viewContinuous() || verticalScrollBar()->value() < verticalScrollBar()->maxValue() ) { if ( e->key() == Key_Down ) verticalScrollBar()->addLine(); else verticalScrollBar()->addPage(); } else if ( d->document->currentPage() < d->items.count() - 1 ) { // more optmized than document->setNextPage and then move view to top DocumentViewport newViewport = d->document->viewport(); newViewport.pageNumber += 1; newViewport.reCenter.enabled = true; newViewport.reCenter.normalizedCenterY = 0.0; d->document->setViewport( newViewport ); } break; case Key_Left: horizontalScrollBar()->subtractLine(); break; case Key_Right: horizontalScrollBar()->addLine(); break; case Key_Shift: case Key_Control: if ( d->autoScrollTimer ) { if ( d->autoScrollTimer->isActive() ) d->autoScrollTimer->stop(); else slotAutoScoll(); return; } default: e->ignore(); return; } // if a known key has been pressed, stop scrolling the page if ( d->autoScrollTimer ) { d->scrollIncrement = 0; d->autoScrollTimer->stop(); } } void PageView::contentsMouseMoveEvent( QMouseEvent * e ) { // don't perform any mouse action when no document is shown if ( d->items.isEmpty() ) return; // don't perform any mouse action when viewport is autoscrolling if ( d->viewportMoveActive ) return; // if holding mouse mid button, perform zoom if ( (e->state() & MidButton) && d->mouseMidStartY > 0 ) { int deltaY = d->mouseMidStartY - e->globalPos().y(); d->mouseMidStartY = e->globalPos().y(); d->zoomFactor *= ( 1.0 + ( (double)deltaY / 500.0 ) ); updateZoom( ZoomRefreshCurrent ); // uncomment following line to force a complete redraw viewport()->repaint( false ); return; } bool leftButton = e->state() & LeftButton, rightButton = e->state() & RightButton; switch ( d->mouseMode ) { case MouseNormal: if ( leftButton ) { // drag page if ( !d->mouseGrabPos.isNull() ) { // scroll page by position increment QPoint delta = d->mouseGrabPos - e->globalPos(); scrollBy( delta.x(), delta.y() ); d->mouseGrabPos = e->globalPos(); } } else if ( rightButton && !d->mousePressPos.isNull() ) { // if mouse moves 5 px away from the press point, switch to 'selection' int deltaX = d->mousePressPos.x() - e->globalPos().x(), deltaY = d->mousePressPos.y() - e->globalPos().y(); if ( deltaX > 5 || deltaX < -5 || deltaY > 5 || deltaY < -5 ) { d->aPrevAction = d->aMouseNormal; d->aMouseSelect->activate(); QColor selColor = palette().active().highlight().light( 120 ); selectionStart( e->x() + deltaX, e->y() + deltaY, selColor, false ); selectionEndPoint( e->x(), e->y() ); break; } } else { // only hovering the page, so update the cursor updateCursor( e->pos() ); } break; case MouseZoom: case MouseSelect: // set second corner of selection if ( (leftButton || d->aPrevAction) && !d->mouseSelectionRect.isNull() ) selectionEndPoint( e->x(), e->y() ); break; case MouseEdit: // ? update graphics ? break; } } void PageView::contentsMousePressEvent( QMouseEvent * e ) { // don't perform any mouse action when no document is shown if ( d->items.isEmpty() ) return; // if performing a selection or dyn zooming, disable mouse press if ( !d->mouseSelectionRect.isNull() || d->mouseMidStartY != -1 || d->viewportMoveActive ) return; // if the page is scrolling, stop it if ( d->autoScrollTimer ) { d->scrollIncrement = 0; d->autoScrollTimer->stop(); } // if pressing mid mouse button while not doing other things, begin 'comtinous zoom' mode if ( e->button() & MidButton ) { d->mouseMidStartY = e->globalPos().y(); setCursor( sizeVerCursor ); return; } // update press / 'start drag' mouse position d->mousePressPos = e->globalPos(); // handle mode dependant mouse press actions bool leftButton = e->button() & LeftButton, rightButton = e->button() & RightButton; switch ( d->mouseMode ) { case MouseNormal: // drag start / click / link following if ( leftButton ) { d->mouseGrabPos = d->mouseOnRect ? QPoint() : d->mousePressPos; if ( !d->mouseOnRect ) setCursor( sizeAllCursor ); } break; case MouseZoom: // set first corner of the zoom rect if ( leftButton ) selectionStart( e->x(), e->y(), palette().active().highlight(), false ); else if ( rightButton ) updateZoom( ZoomOut ); break; case MouseSelect: // set first corner of the selection rect if ( leftButton ) { QColor selColor = palette().active().highlight().light( 120 ); selectionStart( e->x(), e->y(), selColor, false ); } break; case MouseEdit: // ..to do.. break; } } void PageView::contentsMouseReleaseEvent( QMouseEvent * e ) { // don't perform any mouse action when no document is shown if ( d->items.isEmpty() ) return; // don't perform any mouse action when viewport is autoscrolling if ( d->viewportMoveActive ) return; // handle mode indepent mid buttom zoom bool midButton = e->button() & MidButton; if ( midButton && d->mouseMidStartY > 0 ) { d->mouseMidStartY = -1; // while drag-zooming we could have gone over a link updateCursor( e->pos() ); return; } bool leftButton = e->button() & LeftButton, rightButton = e->button() & RightButton; switch ( d->mouseMode ) { case MouseNormal:{ // return the cursor to its normal state after dragging if ( cursor().shape() == Qt::SizeAllCursor ) updateCursor( e->pos() ); PageViewItem * pageItem = pickItemOnPoint( e->x(), e->y() ); // if the mouse has not moved since the press, that's a -click- if ( leftButton && pageItem && d->mousePressPos == e->globalPos()) { double nX = (double)(e->x() - pageItem->geometry().left()) / (double)pageItem->width(), nY = (double)(e->y() - pageItem->geometry().top()) / (double)pageItem->height(); const ObjectRect * rect = pageItem->page()->getObjectRect( nX, nY ); if ( rect ) { // handle click over a link/image switch ( rect->objectType() ) { case ObjectRect::Link:{ const KPDFLink * link = static_cast< const KPDFLink * >( rect->pointer() ); d->document->processLink( link ); }break; case ObjectRect::Image: break; } } else { // if not on a rect, the click selects the page d->document->setViewportPage( pageItem->pageNumber(), PAGEVIEW_ID ); } } else if ( rightButton ) { // right click (if not within 5 px of the press point, the mode // had been already changed to 'Selection' instead of 'Normal') emit rightClick( pageItem ? pageItem->page() : 0, e->globalPos() ); } }break; case MouseZoom: // if a selection rect has been defined, zoom into it if ( leftButton && !d->mouseSelectionRect.isNull() ) { QRect selRect = d->mouseSelectionRect.normalize(); if ( selRect.width() <= 8 && selRect.height() <= 8 ) { selectionClear(); break; } // find out new zoom ratio and normalized view center (relative to the contentsRect) double zoom = QMIN( (double)visibleWidth() / (double)selRect.width(), (double)visibleHeight() / (double)selRect.height() ); double nX = (double)(selRect.left() + selRect.right()) / (2.0 * (double)contentsWidth()); double nY = (double)(selRect.top() + selRect.bottom()) / (2.0 * (double)contentsHeight()); // zoom up to 400% if ( d->zoomFactor <= 4.0 || zoom <= 1.0 ) { d->zoomFactor *= zoom; viewport()->setUpdatesEnabled( false ); updateZoom( ZoomRefreshCurrent ); viewport()->setUpdatesEnabled( true ); } // recenter view and update the viewport center( (int)(nX * contentsWidth()), (int)(nY * contentsHeight()) ); updateContents(); // hide message box and delete overlay window selectionClear(); } break; case MouseSelect:{ // if a selection is defined, display a popup if ( (!leftButton && !d->aPrevAction) || (leftButton && d->aPrevAction) || d->mouseSelectionRect.isNull() ) break; QRect selectionRect = d->mouseSelectionRect.normalize(); if ( selectionRect.width() <= 8 && selectionRect.height() <= 8 ) { selectionClear(); if ( d->aPrevAction ) { d->aPrevAction->activate(); d->aPrevAction = 0; } break; } // grab text in selection by extracting it from all intersected pages QString selectedText; QValueVector< PageViewItem * >::iterator iIt = d->items.begin(), iEnd = d->items.end(); for ( ; iIt != iEnd; ++iIt ) { PageViewItem * item = *iIt; const QRect & itemRect = item->geometry(); if ( selectionRect.intersects( itemRect ) ) { // request the textpage if there isn't one const KPDFPage * kpdfPage = item->page(); if ( !kpdfPage->hasSearchPage() ) d->document->requestTextPage( kpdfPage->number() ); // grab text in the rect that intersects itemRect QRect relativeRect = selectionRect.intersect( itemRect ); relativeRect.moveBy( -itemRect.left(), -itemRect.top() ); NormalizedRect normRect( relativeRect, item->width(), item->height() ); selectedText += kpdfPage->getText( normRect ); } } // popup that ask to copy:text and copy/save:image KPopupMenu menu( this ); if ( !selectedText.isEmpty() ) { menu.insertTitle( i18n( "Text (1 character)", "Text (%n characters)", selectedText.length() ) ); menu.insertItem( SmallIcon("editcopy"), i18n( "Copy to Clipboard" ), 1 ); if ( !d->document->isAllowed( KPDFDocument::AllowCopy ) ) menu.setItemEnabled( 1, false ); if ( Settings::useKTTSD() ) menu.insertItem( SmallIcon("kttsd"), i18n( "Speak Text" ), 2 ); } menu.insertTitle( i18n( "Image (%1 by %2 pixels)" ).arg( selectionRect.width() ).arg( selectionRect.height() ) ); menu.insertItem( SmallIcon("image"), i18n( "Copy to Clipboard" ), 3 ); menu.insertItem( SmallIcon("filesave"), i18n( "Save to File..." ), 4 ); int choice = menu.exec( e->globalPos() ); // IMAGE operation choosen if ( choice > 2 ) { // renders page into a pixmap QPixmap copyPix( selectionRect.width(), selectionRect.height() ); QPainter copyPainter( ©Pix ); copyPainter.translate( -selectionRect.left(), -selectionRect.top() ); paintItems( ©Painter, selectionRect ); if ( choice == 3 ) { // [2] copy pixmap to clipboard QClipboard *cb = QApplication::clipboard(); cb->setPixmap( copyPix, QClipboard::Clipboard ); if ( cb->supportsSelection() ) cb->setPixmap( copyPix, QClipboard::Selection ); d->messageWindow->display( i18n( "Image [%1x%2] copied to clipboard." ).arg( copyPix.width() ).arg( copyPix.height() ) ); } else if ( choice == 4 ) { // [3] save pixmap to file QString fileName = KFileDialog::getSaveFileName( QString::null, "image/png image/jpeg", this ); if ( fileName.isNull() ) d->messageWindow->display( i18n( "File not saved." ), PageViewMessage::Warning ); else { QString type( KImageIO::type( fileName ) ); if ( type.isNull() ) type = "PNG"; copyPix.save( fileName, type.latin1() ); d->messageWindow->display( i18n( "Image [%1x%2] saved to %3 file." ).arg( copyPix.width() ).arg( copyPix.height() ).arg( type ) ); } } } // TEXT operation choosen else { if ( choice == 1 ) { // [1] copy text to clipboard QClipboard *cb = QApplication::clipboard(); cb->setText( selectedText, QClipboard::Clipboard ); if ( cb->supportsSelection() ) cb->setText( selectedText, QClipboard::Selection ); } else if ( choice == 2 ) { // [2] speech selection using KTTSD DCOPClient * client = DCOPClient::mainClient(); // Albert says is this ever necessary? // we already attached on Part constructor if ( !client->isAttached() ) client->attach(); // serialize the text to speech (selectedText) and the // preferred reader ("" is the default voice) ... QByteArray data; QDataStream arg( data, IO_WriteOnly ); arg << selectedText; arg << QString(); QCString replyType; QByteArray replyData; // ..and send it to KTTSD if (client->call( "kttsd", "KSpeech", "setText(QString,QString)", data, replyType, replyData, true )) { QByteArray data2; QDataStream arg2(data2, IO_WriteOnly); arg2 << 0; client->send("kttsd", "KSpeech", "startText(uint)", data2 ); } } } // clear widget selection and invalidate rect selectionClear(); // restore previous action if came from it using right button if ( d->aPrevAction ) { d->aPrevAction->activate(); d->aPrevAction = 0; } }break; case MouseEdit: // ? apply [tool] ? break; } // reset mouse press / 'drag start' position d->mousePressPos = QPoint(); } void PageView::wheelEvent( QWheelEvent *e ) { // don't perform any mouse action when viewport is autoscrolling if ( d->viewportMoveActive ) return; int delta = e->delta(), vScroll = verticalScrollBar()->value(); e->accept(); if ( (e->state() & ControlButton) == ControlButton ) { if ( e->delta() < 0 ) slotZoomOut(); else slotZoomIn(); } else if ( delta <= -120 && !Settings::viewContinuous() && vScroll == verticalScrollBar()->maxValue() ) { // go to next page if ( d->document->currentPage() < d->items.count() - 1 ) { // more optmized than document->setNextPage and then move view to top DocumentViewport newViewport = d->document->viewport(); newViewport.pageNumber += 1; newViewport.reCenter.enabled = true; newViewport.reCenter.normalizedCenterY = 0.0; d->document->setViewport( newViewport ); } } else if ( delta >= 120 && !Settings::viewContinuous() && vScroll == verticalScrollBar()->minValue() ) { // go to prev page if ( d->document->currentPage() > 0 ) { // more optmized than document->setPrevPage and then move view to bottom DocumentViewport newViewport = d->document->viewport(); newViewport.pageNumber -= 1; newViewport.reCenter.enabled = true; newViewport.reCenter.normalizedCenterY = 1.0; d->document->setViewport( newViewport ); } } else QScrollView::wheelEvent( e ); QPoint cp = viewportToContents(e->pos()); updateCursor(cp); } void PageView::dragEnterEvent( QDragEnterEvent * ev ) { ev->accept(); } void PageView::dropEvent( QDropEvent * ev ) { KURL::List lst; if ( KURLDrag::decode( ev, lst ) ) emit urlDropped( lst.first() ); } //END widget events void PageView::paintItems( QPainter * p, const QRect & contentsRect ) { // when checking if an Item is contained in contentsRect, instead of // growing PageViewItems rects (for keeping outline into account), we // grow the contentsRect QRect checkRect = contentsRect; checkRect.addCoords( -3, -3, 1, 1 ); // create a region from wich we'll subtract painted rects QRegion remainingArea( contentsRect ); //QValueVector< PageViewItem * >::iterator iIt = d->visibleItems.begin(), iEnd = d->visibleItems.end(); QValueVector< PageViewItem * >::iterator iIt = d->items.begin(), iEnd = d->items.end(); for ( ; iIt != iEnd; ++iIt ) { // check if a piece of the page intersects the contents rect if ( !(*iIt)->geometry().intersects( checkRect ) ) continue; PageViewItem * item = *iIt; QRect pixmapGeometry = item->geometry(); // translate the painter so we draw top-left pixmap corner in 0,0 p->save(); p->translate( pixmapGeometry.left(), pixmapGeometry.top() ); // item pixmap and outline geometry QRect outlineGeometry = pixmapGeometry; outlineGeometry.addCoords( -1, -1, 3, 3 ); // draw the page outline (little black border and 2px shadow) if ( !pixmapGeometry.contains( contentsRect ) ) { int pixmapWidth = pixmapGeometry.width(), pixmapHeight = pixmapGeometry.height(); // draw simple outline p->setPen( Qt::black ); p->drawRect( -1, -1, pixmapWidth + 2, pixmapHeight + 2 ); // draw bottom/right gradient int levels = 2; int r = Qt::gray.red() / (levels + 2), g = Qt::gray.green() / (levels + 2), b = Qt::gray.blue() / (levels + 2); for ( int i = 0; i < levels; i++ ) { p->setPen( QColor( r * (i+2), g * (i+2), b * (i+2) ) ); p->drawLine( i, i + pixmapHeight + 1, i + pixmapWidth + 1, i + pixmapHeight + 1 ); p->drawLine( i + pixmapWidth + 1, i, i + pixmapWidth + 1, i + pixmapHeight ); p->setPen( Qt::gray ); p->drawLine( -1, i + pixmapHeight + 1, i - 1, i + pixmapHeight + 1 ); p->drawLine( i + pixmapWidth + 1, -1, i + pixmapWidth + 1, i - 1 ); } } // draw the pixmap (note: this modifies the painter) if ( contentsRect.intersects( pixmapGeometry ) ) { QRect pixmapRect = contentsRect.intersect( pixmapGeometry ); pixmapRect.moveBy( -pixmapGeometry.left(), -pixmapGeometry.top() ); int flags = PagePainter::Accessibility | PagePainter::EnhanceLinks | PagePainter::EnhanceImages | PagePainter::Highlights; PagePainter::paintPageOnPainter( item->page(), PAGEVIEW_ID, flags, p, pixmapRect, pixmapGeometry.width(), pixmapGeometry.height() ); } // remove painted area from 'remainingArea' and restore painter remainingArea -= outlineGeometry.intersect( contentsRect ); p->restore(); } // paint with background color the unpainted area QMemArray backRects = remainingArea.rects(); uint backRectsNumber = backRects.count(); for ( uint jr = 0; jr < backRectsNumber; jr++ ) p->fillRect( backRects[ jr ], Qt::gray ); } void PageView::updateItemSize( PageViewItem * item, int colWidth, int rowHeight ) { const KPDFPage * kpdfPage = item->page(); double width = kpdfPage->width(), height = kpdfPage->height(), zoom = d->zoomFactor; if ( d->zoomMode == ZoomFixed ) { width *= zoom; height *= zoom; item->setWHZ( (int)width, (int)height, d->zoomFactor ); } else if ( d->zoomMode == ZoomFitWidth ) { height = kpdfPage->ratio() * colWidth; item->setWHZ( colWidth, (int)height, (double)colWidth / width ); } else if ( d->zoomMode == ZoomFitPage ) { double scaleW = (double)colWidth / (double)width; double scaleH = (double)rowHeight / (double)height; zoom = QMIN( scaleW, scaleH ); item->setWHZ( (int)(zoom * width), (int)(zoom * height), zoom ); } #ifndef NDEBUG else kdDebug() << "calling updateItemSize with unrecognized d->zoomMode!" << endl; #endif } PageViewItem * PageView::pickItemOnPoint( int x, int y ) { PageViewItem * item = 0; QValueList< PageViewItem * >::iterator iIt = d->visibleItems.begin(), iEnd = d->visibleItems.end(); for ( ; iIt != iEnd; ++iIt ) { PageViewItem * i = *iIt; const QRect & r = i->geometry(); if ( x < r.right() && x > r.left() && y < r.bottom() ) { if ( y > r.top() ) item = i; break; } } return item; } void PageView::selectionStart( int x, int y, const QColor & color, bool /*aboveAll*/ ) { d->mouseSelectionRect.setRect( x, y, 1, 1 ); d->selectionRectColor = color; // ensures page doesn't scroll if ( d->autoScrollTimer ) { d->scrollIncrement = 0; d->autoScrollTimer->stop(); } } void PageView::selectionEndPoint( int x, int y ) { // clip selection to the viewport QRect viewportRect( contentsX(), contentsY(), visibleWidth(), visibleHeight() ); x = QMAX( QMIN( x, viewportRect.right() ), viewportRect.left() ); y = QMAX( QMIN( y, viewportRect.bottom() ), viewportRect.top() ); // if selection changed update rect if ( d->mouseSelectionRect.right() != x || d->mouseSelectionRect.bottom() != y ) { // send incremental paint events QRect oldRect = d->mouseSelectionRect.normalize(); d->mouseSelectionRect.setRight( x ); d->mouseSelectionRect.setBottom( y ); QRect newRect = d->mouseSelectionRect.normalize(); // generate diff region: [ OLD.unite(NEW) - OLD.intersect(NEW) ] QRegion compoundRegion = QRegion( oldRect ).unite( newRect ); if ( oldRect.intersects( newRect ) ) { QRect intersection = oldRect.intersect( newRect ); intersection.addCoords( 1, 1, -1, -1 ); if ( intersection.width() > 20 && intersection.height() > 20 ) compoundRegion -= intersection; } // tassellate region with rects and enqueue paint events QMemArray rects = compoundRegion.rects(); for ( uint i = 0; i < rects.count(); i++ ) updateContents( rects[i] ); } } void PageView::selectionClear() { updateContents( d->mouseSelectionRect.normalize() ); d->mouseSelectionRect.setCoords( 0, 0, -1, -1 ); } void PageView::updateZoom( ZoomMode newZoomMode ) { if ( newZoomMode == ZoomFixed ) { if ( d->aZoom->currentItem() == 0 ) newZoomMode = ZoomFitWidth; else if ( d->aZoom->currentItem() == 1 ) newZoomMode = ZoomFitPage; } float newFactor = d->zoomFactor; KAction * checkedZoomAction = 0; switch ( newZoomMode ) { case ZoomFixed:{ //ZoomFixed case QString z = d->aZoom->currentText(); newFactor = KGlobal::locale()->readNumber( z.remove( z.find( '%' ), 1 ) ) / 100.0; }break; case ZoomIn: newFactor += (newFactor > 0.99) ? ( newFactor > 1.99 ? 0.5 : 0.2 ) : 0.1; newZoomMode = ZoomFixed; break; case ZoomOut: newFactor -= (newFactor > 0.99) ? ( newFactor > 1.99 ? 0.5 : 0.2 ) : 0.1; newZoomMode = ZoomFixed; break; case ZoomFitWidth: checkedZoomAction = d->aZoomFitWidth; break; case ZoomFitPage: checkedZoomAction = d->aZoomFitPage; break; case ZoomFitText: checkedZoomAction = d->aZoomFitText; break; case ZoomRefreshCurrent: newZoomMode = ZoomFixed; d->zoomFactor = -1; break; } if ( newFactor > 4.0 ) newFactor = 4.0; if ( newFactor < 0.1 ) newFactor = 0.1; if ( newZoomMode != d->zoomMode || (newZoomMode == ZoomFixed && newFactor != d->zoomFactor ) ) { // rebuild layout and update the whole viewport d->zoomMode = newZoomMode; d->zoomFactor = newFactor; // be sure to block updates to document's viewport bool prevState = d->blockViewport; d->blockViewport = true; slotRelayoutPages(); d->blockViewport = prevState; // request pixmaps slotRequestVisiblePixmaps(); // update zoom text updateZoomText(); // update actions checked state d->aZoomFitWidth->setChecked( checkedZoomAction == d->aZoomFitWidth ); d->aZoomFitPage->setChecked( checkedZoomAction == d->aZoomFitPage ); d->aZoomFitText->setChecked( checkedZoomAction == d->aZoomFitText ); } } void PageView::updateZoomText() { // use current page zoom as zoomFactor if in ZoomFit/* mode if ( d->zoomMode != ZoomFixed && d->items.count() > 0 ) d->zoomFactor = d->items[ QMAX( 0, (int)d->document->currentPage() ) ]->zoomFactor(); float newFactor = d->zoomFactor; d->aZoom->clear(); // add items that describe fit actions QStringList translated; translated << i18n("Fit Width") << i18n("Fit Page"); // << i18n("Fit Text"); // add percent items QString double_oh( "00" ); const float zoomValue[10] = { 0.125, 0.25, 0.333, 0.5, 0.667, 0.75, 1, 1.25, 1.50, 2 }; int idx = 0, selIdx = 2; // use 3 if "fit text" present bool inserted = false; //use: "d->zoomMode != ZoomFixed" to hide Fit/* zoom ratio while ( idx < 10 || !inserted ) { float value = idx < 10 ? zoomValue[ idx ] : newFactor; if ( !inserted && newFactor < (value - 0.0001) ) value = newFactor; else idx ++; if ( value > (newFactor - 0.0001) && value < (newFactor + 0.0001) ) inserted = true; if ( !inserted ) selIdx++; QString localValue( KGlobal::locale()->formatNumber( value * 100.0, 2 ) ); localValue.remove( KGlobal::locale()->decimalSymbol() + double_oh ); translated << QString( "%1%" ).arg( localValue ); } d->aZoom->setItems( translated ); // select current item in list if ( d->zoomMode == ZoomFitWidth ) selIdx = 0; else if ( d->zoomMode == ZoomFitPage ) selIdx = 1; else if ( d->zoomMode == ZoomFitText ) selIdx = 2; d->aZoom->setCurrentItem( selIdx ); } void PageView::updateCursor( const QPoint &p ) { // detect the underlaying page (if present) PageViewItem * pageItem = pickItemOnPoint( p.x(), p.y() ); if ( pageItem ) { double nX = (double)(p.x() - pageItem->geometry().left()) / (double)pageItem->width(), nY = (double)(p.y() - pageItem->geometry().top()) / (double)pageItem->height(); // if over a ObjectRect (of type Link) change cursor to hand const ObjectRect * r = pageItem->page()->getObjectRect( nX, nY ); d->mouseOnRect = r && r->objectType() == ObjectRect::Link; if ( d->mouseOnRect ) setCursor( pointingHandCursor ); else setCursor( arrowCursor ); } else { // if there's no page over the cursor and we were showing the pointingHandCursor // go back to the normal one d->mouseOnRect = false; setCursor( arrowCursor ); } } //BEGIN private SLOTS void PageView::slotRelayoutPages() // called by: notifySetup, viewportResizeEvent, slotTwoPagesToggled, slotContinuousToggled, updateZoom { // set an empty container if we have no pages int pageCount = d->items.count(); if ( pageCount < 1 ) { resizeContents( 0, 0 ); return; } // if viewport was auto-moving, stop it if ( d->viewportMoveActive ) { d->viewportMoveActive = false; d->viewportMoveTimer->stop(); verticalScrollBar()->setEnabled( true ); horizontalScrollBar()->setEnabled( true ); } // common iterator used in this method and viewport parameters QValueVector< PageViewItem * >::iterator iIt, iEnd = d->items.end(); int viewportWidth = visibleWidth(), viewportHeight = visibleHeight(), fullWidth = 0, fullHeight = 0; QRect viewportRect( contentsX(), contentsY(), viewportWidth, viewportHeight ); // set all items geometry and resize contents. handle 'continuous' and 'single' modes separately if ( Settings::viewContinuous() ) { // Here we find out column's width and row's height to compute a table // so we can place widgets 'centered in virtual cells'. int nCols = Settings::viewColumns(), nRows = (int)ceilf( (float)pageCount / (float)nCols ), * colWidth = new int[ nCols ], * rowHeight = new int[ nRows ], cIdx = 0, rIdx = 0; for ( int i = 0; i < nCols; i++ ) colWidth[ i ] = viewportWidth / nCols; for ( int i = 0; i < nRows; i++ ) rowHeight[ i ] = 0; // 1) find the maximum columns width and rows height for a grid in // which each page must well-fit inside a cell for ( iIt = d->items.begin(); iIt != iEnd; ++iIt ) { PageViewItem * item = *iIt; // update internal page size (leaving a little margin in case of Fit* modes) updateItemSize( item, colWidth[ cIdx ] - 6, viewportHeight - 8 ); // find row's maximum height and column's max width if ( item->width() + 6 > colWidth[ cIdx ] ) colWidth[ cIdx ] = item->width() + 6; if ( item->height() > rowHeight[ rIdx ] ) rowHeight[ rIdx ] = item->height(); // update col/row indices if ( ++cIdx == nCols ) { cIdx = 0; rIdx++; } } // 2) arrange widgets inside cells int insertX = 0, insertY = 4; // 2 + 4*d->zoomFactor ? cIdx = 0; rIdx = 0; for ( iIt = d->items.begin(); iIt != iEnd; ++iIt ) { PageViewItem * item = *iIt; int cWidth = colWidth[ cIdx ], rHeight = rowHeight[ rIdx ]; // center widget inside 'cells' item->moveTo( insertX + (cWidth - item->width()) / 2, insertY + (rHeight - item->height()) / 2 ); // advance col/row index insertX += cWidth; if ( ++cIdx == nCols ) { cIdx = 0; rIdx++; insertX = 0; insertY += rHeight + 15; // 5 + 15*d->zoomFactor ? } } fullHeight = cIdx ? (insertY + rowHeight[ rIdx ] + 10) : insertY; for ( int i = 0; i < nCols; i++ ) fullWidth += colWidth[ i ]; delete [] colWidth; delete [] rowHeight; } else // viewContinuous is FALSE { PageViewItem * currentItem = d->items[ QMAX( 0, (int)d->document->currentPage() ) ]; // setup varialbles for a 1(row) x N(columns) grid int nCols = Settings::viewColumns(), * colWidth = new int[ nCols ], cIdx = 0; fullHeight = viewportHeight; for ( int i = 0; i < nCols; i++ ) colWidth[ i ] = viewportWidth / nCols; // 1) find out maximum area extension for the pages for ( iIt = d->items.begin(); iIt != iEnd; ++iIt ) { PageViewItem * item = *iIt; if ( item == currentItem || (cIdx > 0 && cIdx < nCols) ) { // update internal page size (leaving a little margin in case of Fit* modes) updateItemSize( item, colWidth[ cIdx ] - 6, viewportHeight - 8 ); // find row's maximum height and column's max width if ( item->width() + 6 > colWidth[ cIdx ] ) colWidth[ cIdx ] = item->width() + 6; if ( item->height() + 8 > fullHeight ) fullHeight = item->height() + 8; cIdx++; } } // 2) hide all widgets except the displayable ones and dispose those int insertX = 0; cIdx = 0; for ( iIt = d->items.begin(); iIt != iEnd; ++iIt ) { PageViewItem * item = *iIt; if ( item == currentItem || (cIdx > 0 && cIdx < nCols) ) { // center widget inside 'cells' item->moveTo( insertX + (colWidth[ cIdx ] - item->width()) / 2, (fullHeight - item->height()) / 2 ); // advance col index insertX += colWidth[ cIdx ]; cIdx++; } else item->setGeometry( 0, 0, -1, -1 ); } for ( int i = 0; i < nCols; i++ ) fullWidth += colWidth[ i ]; delete [] colWidth; } // 3) reset dirty state d->dirtyLayout = false; // 4) update scrollview's contents size and recenter view bool wasUpdatesEnabled = viewport()->isUpdatesEnabled(); if ( fullWidth != contentsWidth() || fullHeight != contentsHeight() ) { // disable updates and resize the viewportContents if ( wasUpdatesEnabled ) viewport()->setUpdatesEnabled( false ); resizeContents( fullWidth, fullHeight ); // restore previous viewport if defined and updates enabled if ( wasUpdatesEnabled ) { const DocumentViewport & vp = d->document->viewport(); if ( vp.pageNumber >= 0 ) { int prevX = contentsX(), prevY = contentsY(); const QRect & geometry = d->items[ vp.pageNumber ]->geometry(); double nX = vp.reCenter.enabled ? vp.reCenter.normalizedCenterX : 0.5, nY = vp.reCenter.enabled ? vp.reCenter.normalizedCenterY : 0.0; center( geometry.left() + ROUND( nX * (double)geometry.width() ), geometry.top() + ROUND( nY * (double)geometry.height() ) ); // center() usually moves the viewport, that requests pixmaps too. // if that doesn't happen we have to request them by hand if ( prevX == contentsX() && prevY == contentsY() ) slotRequestVisiblePixmaps(); } // or else go to center page else center( fullWidth / 2, 0 ); viewport()->setUpdatesEnabled( true ); } } // 5) update the whole viewport if updated enabled if ( wasUpdatesEnabled ) updateContents(); } void PageView::slotRequestVisiblePixmaps( int newLeft, int newTop ) { // if requests are blocked (because raised by an unwanted event), exit if ( d->blockPixmapsRequest || d->viewportMoveActive ) return; // precalc view limits for intersecting with page coords inside the lOOp bool isEvent = newLeft != -1 && newTop != -1 && !d->blockViewport; QRect viewportRect( isEvent ? newLeft : contentsX(), isEvent ? newTop : contentsY(), visibleWidth(), visibleHeight() ); // some variables used to determine the viewport int nearPageNumber = -1; double viewportCenterX = (viewportRect.left() + viewportRect.right()) / 2.0, viewportCenterY = (viewportRect.top() + viewportRect.bottom()) / 2.0, focusedX = 0.5, focusedY = 0.0, minDistance = -1.0; // iterate over all items d->visibleItems.clear(); QValueList< PixmapRequest * > requestedPixmaps; QValueVector< PageViewItem * >::iterator iIt = d->items.begin(), iEnd = d->items.end(); for ( ; iIt != iEnd; ++iIt ) { PageViewItem * i = *iIt; // if the item doesn't intersect the viewport, skip it if ( !viewportRect.intersects( i->geometry() ) ) continue; // add the item to the 'visible list' d->visibleItems.push_back( i ); // if the item has not the right pixmap, add a request for it if ( !i->page()->hasPixmap( PAGEVIEW_ID, i->width(), i->height() ) ) { PixmapRequest * p = new PixmapRequest( PAGEVIEW_ID, i->pageNumber(), i->width(), i->height(), PAGEVIEW_PRIO, true ); requestedPixmaps.push_back( p ); } // look for the item closest to viewport center and the relative // position between the item and the viewport center if ( isEvent ) { const QRect & geometry = i->geometry(); // compute distance between item center and viewport center double distance = hypot( (geometry.left() + geometry.right()) / 2 - viewportCenterX, (geometry.top() + geometry.bottom()) / 2 - viewportCenterY ); if ( distance >= minDistance && nearPageNumber != -1 ) continue; nearPageNumber = i->pageNumber(); minDistance = distance; if ( geometry.height() > 0 && geometry.width() > 0 ) { focusedX = ( viewportCenterX - (double)geometry.left() ) / (double)geometry.width(); focusedY = ( viewportCenterY - (double)geometry.top() ) / (double)geometry.height(); } } } // if preloading is enabled, add the pages before and after in preloading if ( !d->visibleItems.isEmpty() && Settings::memoryLevel() != Settings::EnumMemoryLevel::Low && Settings::enableThreading() ) { // add the page before the 'visible series' in preload int headRequest = d->visibleItems.first()->pageNumber() - 1; if ( headRequest >= 0 ) { PageViewItem * i = d->items[ headRequest ]; // request the pixmap if not already present if ( !i->page()->hasPixmap( PAGEVIEW_ID, i->width(), i->height() ) && i->width() > 0 ) requestedPixmaps.push_back( new PixmapRequest( PAGEVIEW_ID, i->pageNumber(), i->width(), i->height(), PAGEVIEW_PRELOAD_PRIO, true ) ); } // add the page after the 'visible series' in preload int tailRequest = d->visibleItems.last()->pageNumber() + 1; if ( tailRequest < (int)d->items.count() ) { PageViewItem * i = d->items[ tailRequest ]; // request the pixmap if not already present if ( !i->page()->hasPixmap( PAGEVIEW_ID, i->width(), i->height() ) && i->width() > 0 ) requestedPixmaps.push_back( new PixmapRequest( PAGEVIEW_ID, i->pageNumber(), i->width(), i->height(), PAGEVIEW_PRELOAD_PRIO, true ) ); } } // send requests to the document if ( !requestedPixmaps.isEmpty() ) d->document->requestPixmaps( requestedPixmaps ); // if this functions was invoked by viewport events, send update to document if ( isEvent && nearPageNumber != -1 ) { // determine the document viewport DocumentViewport newViewport( nearPageNumber ); newViewport.reCenter.enabled = true; newViewport.reCenter.normalizedCenterX = focusedX; newViewport.reCenter.normalizedCenterY = focusedY; // set the viewport to other observers d->document->setViewport( newViewport , PAGEVIEW_ID); } } void PageView::slotMoveViewport() { // converge to viewportMoveDest in 1 second int diffTime = d->viewportMoveTime.elapsed(); if ( diffTime >= 667 || !d->viewportMoveActive ) { center( d->viewportMoveDest.x(), d->viewportMoveDest.y() ); d->viewportMoveTimer->stop(); d->viewportMoveActive = false; slotRequestVisiblePixmaps(); verticalScrollBar()->setEnabled( true ); horizontalScrollBar()->setEnabled( true ); return; } // move the viewport smoothly (kmplot: p(x)=x+x*(1-x)*(1-x)) float convergeSpeed = (float)diffTime / 667.0, x = ((float)visibleWidth() / 2.0) + contentsX(), y = ((float)visibleHeight() / 2.0) + contentsY(), diffX = (float)d->viewportMoveDest.x() - x, diffY = (float)d->viewportMoveDest.y() - y; convergeSpeed *= convergeSpeed * (1.4 - convergeSpeed); center( (int)(x + diffX * convergeSpeed), (int)(y + diffY * convergeSpeed ) ); } void PageView::slotAutoScoll() { // the first time create the timer if ( !d->autoScrollTimer ) { d->autoScrollTimer = new QTimer( this ); connect( d->autoScrollTimer, SIGNAL( timeout() ), this, SLOT( slotAutoScoll() ) ); } // if scrollIncrement is zero, stop the timer if ( !d->scrollIncrement ) { d->autoScrollTimer->stop(); return; } // compute delay between timer ticks and scroll amount per tick int index = abs( d->scrollIncrement ) - 1; // 0..9 const int scrollDelay[10] = { 200, 100, 50, 30, 20, 30, 25, 20, 30, 20 }; const int scrollOffset[10] = { 1, 1, 1, 1, 1, 2, 2, 2, 4, 4 }; d->autoScrollTimer->changeInterval( scrollDelay[ index ] ); scrollBy( 0, d->scrollIncrement > 0 ? scrollOffset[ index ] : -scrollOffset[ index ] ); } void PageView::findAheadStop() { d->typeAheadActive = false; d->typeAheadString = ""; d->messageWindow->display( i18n("Find stopped."), PageViewMessage::Find, 1000 ); releaseKeyboard(); } void PageView::slotZoom() { setFocus(); updateZoom( ZoomFixed ); } void PageView::slotZoomIn() { updateZoom( ZoomIn ); } void PageView::slotZoomOut() { updateZoom( ZoomOut ); } void PageView::slotFitToWidthToggled( bool on ) { if ( on ) updateZoom( ZoomFitWidth ); } void PageView::slotFitToPageToggled( bool on ) { if ( on ) updateZoom( ZoomFitPage ); } void PageView::slotFitToTextToggled( bool on ) { if ( on ) updateZoom( ZoomFitText ); } void PageView::slotTwoPagesToggled( bool on ) { uint newColumns = on ? 2 : 1; if ( Settings::viewColumns() != newColumns ) { Settings::setViewColumns( newColumns ); if ( d->document->pages() > 0 ) slotRelayoutPages(); } } void PageView::slotContinuousToggled( bool on ) { if ( Settings::viewContinuous() != on ) { Settings::setViewContinuous( on ); if ( d->document->pages() > 0 ) slotRelayoutPages(); } } void PageView::slotSetMouseNormal() { d->mouseMode = MouseNormal; d->messageWindow->hide(); } void PageView::slotSetMouseZoom() { d->mouseMode = MouseZoom; d->messageWindow->display( i18n( "Select zooming area. Right-click to zoom out." ), PageViewMessage::Info, -1 ); } void PageView::slotSetMouseSelect() { d->mouseMode = MouseSelect; d->messageWindow->display( i18n( "Draw a rectangle around the text/graphics to copy." ), PageViewMessage::Info, -1 ); } void PageView::slotSetMouseDraw() { d->mouseMode = MouseEdit; d->aMouseEdit->setChecked( true ); d->messageWindow->hide(); } void PageView::slotScrollUp() { if ( d->scrollIncrement < -9 ) return; d->scrollIncrement--; slotAutoScoll(); setFocus(); } void PageView::slotScrollDown() { if ( d->scrollIncrement > 9 ) return; d->scrollIncrement++; slotAutoScoll(); setFocus(); } //END private SLOTS #include "pageview.moc"