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tdegraphics/kpdf/ui/thumbnaillist.cpp

576 lines
18 KiB

/***************************************************************************
* Copyright (C) 2004-2006 by Albert Astals Cid <tsdgeos@terra.es> *
* *
* 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 <tqtimer.h>
#include <tqpainter.h>
#include <klocale.h>
#include <kurl.h>
#include <kurldrag.h>
#include <kaction.h>
#include <kiconloader.h>
#include <kactioncollection.h>
// local includes
#include "thumbnaillist.h"
#include "pagepainter.h"
#include "searchwidget.h" // for SW_SEARCH_ID
#include "core/document.h"
#include "core/generator.h"
#include "core/page.h"
#include "conf/settings.h"
// ThumbnailWidget represents a single thumbnail in the ThumbnailList
class ThumbnailWidget : public TQWidget
{
public:
ThumbnailWidget( TQWidget * parent, const KPDFPage * page, ThumbnailList * tl );
// set internal parameters to fit the page in the given width
void resizeFitWidth( int width );
// set thumbnail's selected state
void setSelected( bool selected );
// query methods
int heightHint() const { return m_pixmapHeight + m_labelHeight + m_margin; }
int pixmapWidth() const { return m_pixmapWidth; }
int pixmapHeight() const { return m_pixmapHeight; }
int pageNumber() const { return m_page->number(); }
const KPDFPage * page() const { return m_page; }
protected:
void mouseReleaseEvent( TQMouseEvent * e );
void paintEvent(TQPaintEvent *);
private:
// the margin around the widget
static int const m_margin = 16;
// used to access 'forwardRightClick( .. )' and 'getBookmarkOverlay()'
ThumbnailList * m_tl;
const KPDFPage * m_page;
bool m_selected;
int m_pixmapWidth, m_pixmapHeight;
int m_labelHeight, m_labelNumber;
};
/** ThumbnailList implementation **/
ThumbnailList::ThumbnailList( TQWidget *parent, KPDFDocument *document )
: TQScrollView( parent, "KPDF::Thumbnails", WNoAutoErase | WStaticContents ),
m_document( document ), m_selected( 0 ), m_delayTimer( 0 ), m_bookmarkOverlay( 0 )
{
// set scrollbars
setHScrollBarMode( TQScrollView::AlwaysOff );
setVScrollBarMode( TQScrollView::AlwaysOn );
// dealing with large areas so enable clipper
enableClipper( true );
// widget setup: can be focused by tab and mouse click (not wheel)
viewport()->setFocusProxy( this );
viewport()->setFocusPolicy( TQ_StrongFocus );
setResizePolicy( Manual );
setAcceptDrops( true );
setDragAutoScroll( false );
// set contents background to the 'base' color
viewport()->setPaletteBackgroundColor( tqpalette().active().base() );
setFrameStyle( StyledPanel | Raised );
connect( this, TQT_SIGNAL(contentsMoving(int, int)), this, TQT_SLOT(slotRequestVisiblePixmaps(int, int)) );
}
ThumbnailList::~ThumbnailList()
{
m_document->removeObserver( this );
delete m_bookmarkOverlay;
}
//BEGIN DocumentObserver inherited methods
void ThumbnailList::notifySetup( const TQValueVector< KPDFPage * > & pages, bool documentChanged )
{
// if there was a widget selected, save its pagenumber to restore
// its selection (if available in the new set of pages)
int prevPage = -1;
if ( !documentChanged && m_selected )
{
prevPage = m_selected->page()->number();
}
// delete all the Thumbnails
TQValueVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
for ( ; tIt != tEnd; ++tIt )
delete *tIt;
m_thumbnails.clear();
m_visibleThumbnails.clear();
m_selected = 0;
if ( pages.count() < 1 )
{
resizeContents( 0, 0 );
return;
}
// show pages containing hilighted text or bookmarked ones
//RESTORE THIS int flags = Settings::filterBookmarks() ? KPDFPage::Bookmark : KPDFPage::Highlight;
// if no page matches filter rule, then display all pages
TQValueVector< KPDFPage * >::const_iterator pIt = pages.begin(), pEnd = pages.end();
bool skipCheck = true;
for ( ; pIt != pEnd ; ++pIt )
//if ( (*pIt)->attributes() & flags )
if ( (*pIt)->hasHighlights( SW_SEARCH_ID ) )
skipCheck = false;
// generate Thumbnails for the given set of pages
int width = clipper()->width(),
totalHeight = 0;
for ( pIt = pages.begin(); pIt != pEnd ; ++pIt )
//if ( skipCheck || (*pIt)->attributes() & flags )
if ( skipCheck || (*pIt)->hasHighlights( SW_SEARCH_ID ) )
{
ThumbnailWidget * t = new ThumbnailWidget( viewport(), *pIt, this );
t->setFocusProxy( this );
// add to the scrollview
addChild( t, 0, totalHeight );
// add to the internal queue
m_thumbnails.push_back( t );
// update total height (asking widget its own height)
t->resizeFitWidth( width );
totalHeight += t->heightHint() + 4;
if ( (*pIt)->number() == prevPage )
{
m_selected = t;
m_selected->setSelected( true );
}
t->show();
}
// update scrollview's contents size (sets scrollbars limits)
resizeContents( width, totalHeight );
// request for thumbnail generation
delayedRequestVisiblePixmaps( 200 );
}
void ThumbnailList::notifyViewportChanged( bool /*smoothMove*/ )
{
// skip notifies for the current page (already selected)
int newPage = m_document->viewport().pageNumber;
if ( m_selected && m_selected->pageNumber() == newPage )
return;
// deselect previous thumbnail
if ( m_selected )
m_selected->setSelected( false );
m_selected = 0;
// select the page with viewport and ensure it's centered in the view
m_vectorIndex = 0;
TQValueVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
for ( ; tIt != tEnd; ++tIt )
{
if ( (*tIt)->pageNumber() == newPage )
{
m_selected = *tIt;
m_selected->setSelected( true );
if ( KpdfSettings::syncThumbnailsViewport() )
{
int yOffset = TQMAX( visibleHeight() / 4, m_selected->height() / 2 );
ensureVisible( 0, childY( m_selected ) + m_selected->height()/2, 0, yOffset );
}
break;
}
m_vectorIndex++;
}
}
void ThumbnailList::notifyPageChanged( int pageNumber, int /*changedFlags*/ )
{
// only handle pixmap changed notifies (the only defined for now)
//if ( !(changedFlags & DocumentObserver::Pixmap) )
// return;
// iterate over visible items: if page(pageNumber) is one of them, tqrepaint it
TQValueList<ThumbnailWidget *>::iterator vIt = m_visibleThumbnails.begin(), vEnd = m_visibleThumbnails.end();
for ( ; vIt != vEnd; ++vIt )
if ( (*vIt)->pageNumber() == pageNumber )
{
(*vIt)->update();
break;
}
}
void ThumbnailList::notifyContentsCleared( int changedFlags )
{
// if pixmaps were cleared, re-ask them
if ( changedFlags & DocumentObserver::Pixmap )
slotRequestVisiblePixmaps();
}
bool ThumbnailList::canUnloadPixmap( int pageNumber )
{
// if the thubnail 'pageNumber' is one of the visible ones, forbid unloading
TQValueList<ThumbnailWidget *>::iterator vIt = m_visibleThumbnails.begin(), vEnd = m_visibleThumbnails.end();
for ( ; vIt != vEnd; ++vIt )
if ( (*vIt)->pageNumber() == pageNumber )
return false;
// if hidden permit unloading
return true;
}
//END DocumentObserver inherited methods
void ThumbnailList::updateWidgets()
{
// find all widgets that intersects the viewport and update them
TQRect viewportRect( contentsX(), contentsY(), visibleWidth(), visibleHeight() );
TQValueList<ThumbnailWidget *>::iterator vIt = m_visibleThumbnails.begin(), vEnd = m_visibleThumbnails.end();
for ( ; vIt != vEnd; ++vIt )
{
ThumbnailWidget * t = *vIt;
TQRect widgetRect( childX( t ), childY( t ), t->width(), t->height() );
// update only the exposed area of the widget (saves pixels..)
TQRect relativeRect = viewportRect.intersect( widgetRect );
if ( !relativeRect.isValid() )
continue;
relativeRect.moveBy( -widgetRect.left(), -widgetRect.top() );
t->update( relativeRect );
}
}
void ThumbnailList::forwardRightClick( const KPDFPage * p, const TQPoint & t )
{
emit rightClick( p, t );
}
const TQPixmap * ThumbnailList::getBookmarkOverlay() const
{
return m_bookmarkOverlay;
}
void ThumbnailList::slotFilterBookmarks( bool filterOn )
{
// save state
KpdfSettings::setFilterBookmarks( filterOn );
KpdfSettings::writeConfig();
// ask for the 'notifySetup' with a little trick (on reinsertion the
// document sends the list again)
m_document->removeObserver( this );
m_document->addObserver( this );
}
//BEGIN widget events
void ThumbnailList::keyPressEvent( TQKeyEvent * keyEvent )
{
if ( m_thumbnails.count() < 1 )
return keyEvent->ignore();
int nextPage = -1;
if ( keyEvent->key() == Key_Up )
{
if ( !m_selected )
nextPage = 0;
else if ( m_vectorIndex > 0 )
nextPage = m_thumbnails[ m_vectorIndex - 1 ]->pageNumber();
}
else if ( keyEvent->key() == Key_Down )
{
if ( !m_selected )
nextPage = 0;
else if ( m_vectorIndex < (int)m_thumbnails.count() - 1 )
nextPage = m_thumbnails[ m_vectorIndex + 1 ]->pageNumber();
}
else if ( keyEvent->key() == Key_PageUp )
verticalScrollBar()->subtractPage();
else if ( keyEvent->key() == Key_PageDown )
verticalScrollBar()->addPage();
else if ( keyEvent->key() == Key_Home )
nextPage = m_thumbnails[ 0 ]->pageNumber();
else if ( keyEvent->key() == Key_End )
nextPage = m_thumbnails[ m_thumbnails.count() - 1 ]->pageNumber();
if ( nextPage == -1 )
return keyEvent->ignore();
keyEvent->accept();
if ( m_selected )
m_selected->setSelected( false );
m_selected = 0;
m_document->setViewportPage( nextPage );
}
void ThumbnailList::contentsMousePressEvent( TQMouseEvent * e )
{
if ( e->button() != Qt::LeftButton )
return;
int clickY = e->y();
TQValueList<ThumbnailWidget *>::iterator vIt = m_visibleThumbnails.begin(), vEnd = m_visibleThumbnails.end();
for ( ; vIt != vEnd; ++vIt )
{
ThumbnailWidget * t = *vIt;
int childTop = childY(t);
if ( clickY > childTop && clickY < (childTop + t->height()) )
{
if ( m_document->viewport().pageNumber != t->pageNumber() )
m_document->setViewportPage( t->pageNumber() );
break;
}
}
}
void ThumbnailList::viewportResizeEvent( TQResizeEvent * e )
{
if ( m_thumbnails.count() < 1 || width() < 1 )
return;
// if width changed resize all the Thumbnails, reposition them to the
// right place and recalculate the contents area
if ( e->size().width() != e->oldSize().width() )
{
// runs the timer avoiding a thumbnail regeneration by 'contentsMoving'
delayedRequestVisiblePixmaps( 2000 );
// resize and reposition items
int totalHeight = 0,
newWidth = e->size().width();
TQValueVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
for ( ; tIt != tEnd; ++tIt )
{
ThumbnailWidget *t = *tIt;
moveChild( t, 0, totalHeight );
t->resizeFitWidth( newWidth );
totalHeight += t->heightHint() + 4;
}
// update scrollview's contents size (sets scrollbars limits)
resizeContents( newWidth, totalHeight );
// ensure selected item remains visible
if ( m_selected )
ensureVisible( 0, childY( m_selected ) + m_selected->height()/2, 0, visibleHeight()/2 );
}
else if ( e->size().height() <= e->oldSize().height() )
return;
// tqinvalidate the bookmark overlay
if ( m_bookmarkOverlay )
{
delete m_bookmarkOverlay;
m_bookmarkOverlay = 0;
}
// update Thumbnails since width has changed or height has increased
delayedRequestVisiblePixmaps( 500 );
}
void ThumbnailList::dragEnterEvent( TQDragEnterEvent * ev )
{
ev->accept();
}
void ThumbnailList::dropEvent( TQDropEvent * ev )
{
KURL::List lst;
if ( KURLDrag::decode( ev, lst ) )
emit urlDropped( lst.first() );
}
//END widget events
//BEGIN internal SLOTS
void ThumbnailList::slotRequestVisiblePixmaps( int /*newContentsX*/, int newContentsY )
{
// if an update is already scheduled or the widget is hidden, don't proceed
if ( (m_delayTimer && m_delayTimer->isActive()) || !isShown() )
return;
int vHeight = visibleHeight(),
vOffset = newContentsY == -1 ? contentsY() : newContentsY;
// scroll from the top to the last visible thumbnail
m_visibleThumbnails.clear();
TQValueList< PixmapRequest * > requestedPixmaps;
TQValueVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
for ( ; tIt != tEnd; ++tIt )
{
ThumbnailWidget * t = *tIt;
int top = childY( t ) - vOffset;
if ( top > vHeight )
break;
if ( top + t->height() < 0 )
continue;
// add ThumbnailWidget to visible list
m_visibleThumbnails.push_back( t );
// if pixmap not present add it to requests
if ( !t->page()->hasPixmap( THUMBNAILS_ID, t->pixmapWidth(), t->pixmapHeight() ) )
{
PixmapRequest * p = new PixmapRequest(
THUMBNAILS_ID, t->pageNumber(), t->pixmapWidth(), t->pixmapHeight(), THUMBNAILS_PRIO, true );
requestedPixmaps.push_back( p );
}
}
// actually request pixmaps
if ( !requestedPixmaps.isEmpty() )
m_document->requestPixmaps( requestedPixmaps );
}
void ThumbnailList::slotDelayTimeout()
{
// resize the bookmark overlay
delete m_bookmarkOverlay;
int expectedWidth = contentsWidth() / 4;
if ( expectedWidth > 10 )
m_bookmarkOverlay = new TQPixmap( DesktopIcon( "attach", expectedWidth ) );
else
m_bookmarkOverlay = 0;
// request pixmaps
slotRequestVisiblePixmaps();
}
//END internal SLOTS
void ThumbnailList::delayedRequestVisiblePixmaps( int delayMs )
{
if ( !m_delayTimer )
{
m_delayTimer = new TQTimer( this );
connect( m_delayTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( slotDelayTimeout() ) );
}
m_delayTimer->start( delayMs, true );
}
/** ThumbnailWidget implementation **/
ThumbnailWidget::ThumbnailWidget( TQWidget * parent, const KPDFPage * kp, ThumbnailList * tl )
: TQWidget( parent, 0, WNoAutoErase ), m_tl( tl ), m_page( kp ),
m_selected( false ), m_pixmapWidth( 10 ), m_pixmapHeight( 10 )
{
m_labelNumber = m_page->number() + 1;
m_labelHeight = TQFontMetrics( font() ).height();
}
void ThumbnailWidget::resizeFitWidth( int width )
{
m_pixmapWidth = width - m_margin;
m_pixmapHeight = (int)(m_page->ratio() * m_pixmapWidth);
resize( width, heightHint() );
}
void ThumbnailWidget::setSelected( bool selected )
{
// update selected state
if ( m_selected != selected )
{
m_selected = selected;
update( 0, 0, width(), height() );
}
}
void ThumbnailWidget::mouseReleaseEvent( TQMouseEvent * e )
{
if ( e->button() != Qt::RightButton )
return;
m_tl->forwardRightClick( m_page, e->globalPos() );
}
void ThumbnailWidget::paintEvent( TQPaintEvent * e )
{
int width = m_pixmapWidth + m_margin;
int height = m_pixmapHeight + m_margin + m_labelHeight;
TQRect clipRect = e->rect();
if ( !clipRect.isValid() )
return;
TQPainter p( this );
// draw the bottom label + highlight mark
TQColor fillColor = m_selected ? tqpalette().active().highlight() : tqpalette().active().base();
p.fillRect( 0, 0, width, height, fillColor );
p.setPen( m_selected ? tqpalette().active().highlightedText() : tqpalette().active().text() );
p.drawText( 0, m_pixmapHeight + m_margin, width, m_labelHeight, TQt::AlignCenter, TQString::number( m_labelNumber ) );
// draw page outline and pixmap
if ( clipRect.top() < m_pixmapHeight + m_margin )
{
// if page is bookmarked draw a colored border
bool isBookmarked = m_page->hasBookmark();
// draw the inner rect
p.setPen( isBookmarked ? TQColor( 0xFF8000 ) : TQt::black );
p.drawRect( m_margin/2 - 1, m_margin/2 - 1, m_pixmapWidth + 2, m_pixmapHeight + 2 );
// draw the clear rect
p.setPen( isBookmarked ? TQColor( 0x804000 ) : tqpalette().active().base() );
// draw the bottom and right shadow edges
if ( !isBookmarked )
{
int left, right, bottom, top;
left = m_margin/2 + 1;
right = m_margin/2 + m_pixmapWidth + 1;
bottom = m_pixmapHeight + m_margin/2 + 1;
top = m_margin/2 + 1;
p.setPen( TQt::gray );
p.drawLine( left, bottom, right, bottom );
p.drawLine( right, top, right, bottom );
}
// draw the page using the shared PagePainter class
p.translate( m_margin/2, m_margin/2 );
clipRect.moveBy( -m_margin/2, -m_margin/2 );
clipRect = clipRect.intersect( TQRect( 0, 0, m_pixmapWidth, m_pixmapHeight ) );
if ( clipRect.isValid() )
{
int flags = PagePainter::Accessibility | PagePainter::Highlights;
PagePainter::paintPageOnPainter( m_page, THUMBNAILS_ID, flags, &p,
clipRect, m_pixmapWidth, m_pixmapHeight );
}
// draw the bookmark overlay on the top-right corner
const TQPixmap * bookmarkPixmap = m_tl->getBookmarkOverlay();
if ( isBookmarked && bookmarkPixmap )
{
int pixW = bookmarkPixmap->width(),
pixH = bookmarkPixmap->height();
clipRect = clipRect.intersect( TQRect( m_pixmapWidth - pixW, 0, pixW, pixH ) );
if ( clipRect.isValid() )
p.drawPixmap( m_pixmapWidth - pixW, -pixH/8, *bookmarkPixmap );
}
}
}
/** ThumbnailsController implementation **/
#define FILTERB_ID 1
ThumbnailController::ThumbnailController( TQWidget * parent, ThumbnailList * list )
: KToolBar( parent, "ThumbsControlBar" )
{
// change toolbar appearance
setMargin( 3 );
setFlat( true );
setIconSize( 16 );
setMovingEnabled( false );
// insert a togglebutton [show only bookmarked pages]
//insertSeparator();
insertButton( "bookmark", FILTERB_ID, TQT_SIGNAL( toggled( bool ) ),
TQT_TQOBJECT(list), TQT_SLOT( slotFilterBookmarks( bool ) ),
true, i18n( "Show bookmarked pages only" ) );
setToggle( FILTERB_ID );
setButton( FILTERB_ID, KpdfSettings::filterBookmarks() );
//insertLineSeparator();
}
#include "thumbnaillist.moc"