pageview.cpp 30 KB
Newer Older
1
/***************************************************************************
2
 *   Copyright (C) 2004 by Enrico Ros <eros.kde@email.it>                  *
3
 *   Copyright (C) 2004 by Albert Astals Cid <tsdgeos@terra.es>            *
4 5 6 7 8 9 10 11
 *                                                                         *
 *   With portions of code from kpdf_pagewidget.cc by:                     *
 *     Copyright (C) 2002 by Wilco Greven <greven@kde.org>                 *
 *     Copyright (C) 2003 by Christophe Devriese                           *
 *                           <Christophe.Devriese@student.kuleuven.ac.be>  *
 *     Copyright (C) 2003 by Laurent Montel <montel@kde.org>               *
 *     Copyright (C) 2003 by Dirk Mueller <mueller@kde.org>                *
 *     Copyright (C) 2004 by James Ots <kde@jamesots.com>                  *
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
 *                                                                         *
 *   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.                                   *
 ***************************************************************************/

#include <qcursor.h>
#include <qpainter.h>
#include <qtimer.h>
#include <qpushbutton.h>

#include <kiconloader.h>
#include <kurldrag.h>
#include <kaction.h>
#include <kactioncollection.h>
28
#include <kpopupmenu.h>
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
#include <klocale.h>
#include <kconfigbase.h>

#include <math.h>

#include "pageview.h"
#include "pixmapwidget.h"
#include "page.h"


// structure used internally by PageView for data storage
class PageViewPrivate
{
public:
    // the document, current page and pages indices vector
    KPDFDocument * document;
45
    PageWidget * page; //equal to pages[vectorIndex]
46 47 48 49
    QValueVector< PageWidget * > pages;
    int vectorIndex;

    // view layout, zoom and mouse
50 51
    int viewColumns;
    bool viewContinous;
52 53 54 55
    PageView::ZoomMode zoomMode;
    float zoomFactor;
    PageView::MouseMode mouseMode;
    QPoint mouseGrabPos;
56
    QPoint mouseStartPos;
57
    bool mouseOnLink;
58 59

    // other stuff
60
    QTimer *delayTimer;
61
    bool dirtyLayout;
62 63 64 65 66 67

    // actions
    KSelectAction *aZoom;
    KToggleAction *aZoomFitWidth;
    KToggleAction *aZoomFitPage;
    KToggleAction *aZoomFitText;
68 69
    KToggleAction *aViewTwoPages;
    KToggleAction *aViewContinous;
70 71 72
};


73 74 75 76 77 78 79 80 81
/* 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)
 *  200 - events: mouse, keyboard, drag/drop
 *  170 - slotRelayoutPages: set contents of the scrollview on continous/single modes
 *  100 - zoom: zooming pages in different ways, keeping update the toolbar actions, etc..
 *  other misc functions: only slotRequestVisiblePixmaps and pickPageOnPoint noticeable,
 * and many insignificant stuff like this comment :-)
82 83
 */
PageView::PageView( QWidget *parent, KPDFDocument *document )
84
    : QScrollView( parent, "KPDF::pageView", WNoAutoErase | WStaticContents )
85 86 87 88 89
{
    // create and initialize private storage structure
    d = new PageViewPrivate();
    d->document = document;
    d->page = 0;
90
    d->vectorIndex = -1;
91 92
    d->viewColumns = 1;
    d->viewContinous = false;
93
    d->zoomMode = ZoomFixed;
94
    d->zoomFactor = 1.0;
95 96 97
    d->mouseMode = MouseNormal;
    d->mouseOnLink = false;
    d->delayTimer = 0;
98
    d->dirtyLayout = false;
99 100 101

    // dealing with (very) large areas so enable clipper
    enableClipper( true );
102

103 104 105 106 107
    // widget setup: setup focus, accept drops and track mouse
    viewport()->setFocusProxy( this );
    viewport()->setFocusPolicy( StrongFocus );
    viewport()->setPaletteBackgroundColor( Qt::gray );
    setResizePolicy( Manual );
108
    setAcceptDrops( true );
109
    setDragAutoScroll( false );
110
    viewport()->setMouseTracking( true );
111 112 113

    // conntect the padding of the viewport to pixmaps requests
    connect( this, SIGNAL(contentsMoving(int, int)), this, SLOT(slotRequestVisiblePixmaps(int, int)) );
114 115 116

    // set a corner button to resize the view to the page size
    QPushButton * resizeButton = new QPushButton( viewport() );
117
    resizeButton->setPixmap( SmallIcon("crop") );
118 119 120 121 122 123 124 125 126 127 128 129
    setCornerWidget( resizeButton );
    resizeButton->setEnabled( false );
    // connect(...);
}

PageView::~PageView()
{
    delete d;
}

void PageView::setupActions( KActionCollection * ac, KConfigGroup * config )
{
130
    // Zoom actions ( higher scales takes lots of memory! )
131
    d->aZoom = new KSelectAction( i18n( "Zoom" ), "viewmag", 0, this, SLOT( slotZoom() ), ac, "zoom_to" );
132 133
    d->aZoom->setEditable( true );
    updateZoomText();
134 135 136 137 138 139 140 141 142 143 144

    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 ) ) );

145
    d->aZoomFitText = new KToggleAction( i18n("Fit to &Text"), "viewmagfit", 0, ac, "zoom_fit_text" );
146 147
    connect( d->aZoomFitText, SIGNAL( toggled( bool ) ), SLOT( slotFitToTextToggled( bool ) ) );

148
    // View-Layout actions
149 150 151 152
    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( config->readBoolEntry( "ViewTwoPages", false ) );
    slotTwoPagesToggled( d->aViewTwoPages->isChecked() );
153

154 155 156 157
    d->aViewContinous = new KToggleAction( i18n("Continous"), "view_text", 0, ac, "view_continous" );
    connect( d->aViewContinous, SIGNAL( toggled( bool ) ), SLOT( slotContinousToggled( bool ) ) );
    d->aViewContinous->setChecked( config->readBoolEntry( "ViewContinous", true ) );
    slotContinousToggled( d->aViewContinous->isChecked() );
158 159

    // Mouse-Mode actions
160
    KToggleAction * mn = new KRadioAction( i18n("Normal"), "mouse", 0, this, SLOT( slotSetMouseNormal() ), ac, "mouse_drag" );
161 162 163
    mn->setExclusiveGroup("MouseType");
    mn->setChecked( true );

164
    KToggleAction * ms = new KRadioAction( i18n("Select"), "frame_edit", 0, this, SLOT( slotSetMouseSelect() ), ac, "mouse_select" );
165
    ms->setExclusiveGroup("MouseType");
166
    //ms->setEnabled( false ); // implement feature before removing this line
167

168
    KToggleAction * md = new KRadioAction( i18n("Draw"), "edit", 0, this, SLOT( slotSetMouseDraw() ), ac, "mouse_draw" );
169
    md->setExclusiveGroup("MouseType");
170
    //md->setEnabled( false ); // implement feature before removing this line
171 172 173 174 175 176 177 178 179 180 181 182 183

    // Other actions
    KToggleAction * ss = new KToggleAction( i18n( "Show &Scrollbars" ), 0, ac, "show_scrollbars" );
    ss->setCheckedState(i18n("Hide &Scrollbars"));
    connect( ss, SIGNAL( toggled( bool ) ), SLOT( slotToggleScrollBars( bool ) ) );

    ss->setChecked( config->readBoolEntry( "ShowScrollBars", true ) );
    slotToggleScrollBars( ss->isChecked() );
}

void PageView::saveSettings( KConfigGroup * config )
{
    config->writeEntry( "ShowScrollBars", hScrollBarMode() == AlwaysOn );
184 185
    config->writeEntry( "ViewTwoPages", d->aViewTwoPages->isChecked() );
    config->writeEntry( "ViewContinous", d->aViewContinous->isChecked() );
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202
}


//BEGIN KPDFDocumentObserver inherited methods 
void PageView::pageSetup( const QValueVector<KPDFPage*> & pageSet, bool /*documentChanged*/ )
{ /* TODO: preserve (reuse) existing pages if !documentChanged */
    // delete all pages
    QValueVector< PageWidget * >::iterator dIt = d->pages.begin(), dEnd = d->pages.end();
    for ( ; dIt != dEnd; ++dIt )
        delete *dIt;
    d->pages.clear();
    d->page = 0;

    // create children widgets
    QValueVector< KPDFPage * >::const_iterator setIt = pageSet.begin(), setEnd = pageSet.end();
    for ( ; setIt != setEnd; ++setIt )
    {
203 204
        PageWidget * p = new PageWidget( viewport(), *setIt );
        p->setFocusProxy( this );
205
        p->setMouseTracking( true );
206 207 208
        d->pages.push_back( p );
    }

209
    // invalidate layout
210
    d->dirtyLayout = true;
211 212
}

213
void PageView::pageSetCurrent( int pageNumber, float position )
214
{
215 216
    if ( d->dirtyLayout )
        slotRelayoutPages();
217

218 219 220
    // select next page
    d->vectorIndex = 0;
    d->page = 0;
221 222 223
    QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
    for ( ; pIt != pEnd; ++pIt )
    {
224
        if ( (*pIt)->pageNumber() == pageNumber )
225
        {
226
            d->page = *pIt;
227 228
            break;
        }
229
        d->vectorIndex ++;
230
    }
231 232
    if ( !d->page )
        return;
233

234 235 236 237 238 239 240 241 242 243 244 245 246
    // relayout only in "Single Pages" mode
    if ( !d->viewContinous )
        slotRelayoutPages();

    // center the view to see the selected page
    int xPos = childX( d->page ) + d->page->widthHint() / 2,
        yPos = childY( d->page ) + (int)((float)d->page->heightHint() * position);
    center( xPos, yPos + visibleHeight() / 2 - 10 );
    slotRequestVisiblePixmaps();

    // update zoom text if in a ZoomFit/* zoom mode
    if ( d->zoomMode != ZoomFixed )
        updateZoomText();
247 248
}

249
void PageView::notifyPixmapChanged( int pageNumber )
250
{
251 252 253
    QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
    for ( ; pIt != pEnd; ++pIt )
        if ( (*pIt)->pageNumber() == pageNumber )
254
        {
255
            (*pIt)->update();
256 257 258 259 260 261 262 263 264 265 266 267 268
            break;
        }
}
//END KPDFDocumentObserver inherited methods

//BEGIN widget events 
void PageView::contentsMousePressEvent( QMouseEvent * e )
{
    switch ( d->mouseMode )
    {
    case MouseNormal:    // drag / click start
        if ( e->button() & LeftButton )
        {
269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
            d->mouseStartPos = e->globalPos();
            if ( false /*over a link*/ )
            {
                d->mouseGrabPos = QPoint();
                /* TODO Albert
                note: 'Page' is an 'information container' and has to deal with clean
                data (such as the '(int)page & (float)position' where link refers to,
                not a LinkAction struct.. better an own struct). 'Document' is the place
                to put xpdf/Splash dependant stuff and fill up pages with interpreted
                data. I think is a *clean* way to handle everything.
                d->pressedLink = *PAGE* or *DOCUMENT* ->findLink( normalizedX, normY ); */
            }
            else
            {
                d->mouseGrabPos = d->mouseStartPos;
                setCursor( sizeAllCursor );
            }
286 287 288 289 290 291
        }
        else if ( e->button() & RightButton )
            emit rightClick();
        break;

    case MouseSelection: // ? set 1st corner of the selection rect ?
292 293
        //d->
        break;
294 295 296 297 298 299

    case MouseEdit:      // ? place the beginning of [tool] ?
        break;
    }
}

300
void PageView::contentsMouseReleaseEvent( QMouseEvent * e )
301
{
302
    PageWidget * page = pickPageOnPoint( e->x(), e->y() );
303 304 305
    switch ( d->mouseMode )
    {
    case MouseNormal:    // end drag / follow link
306 307 308
        if ( e->button() & LeftButton )
        {
            setCursor( arrowCursor );
309

310 311
            // check if it was a click, in that case select the page
            if ( e->globalPos() == d->mouseStartPos && page )
312 313 314 315 316 317 318 319 320 321 322 323 324 325 326
            {
                if ( d->mouseOnLink )
                {
                    /* TODO Enrico: port links here
                        PageLink * link = *PAGE* ->findLink(e->x()/m_ppp, e->y()/m_ppp);
                        if ( link == d->pressedLink )
                            //go to link, use:
                            document->slotSetCurrentPagePosition( (int)link->page(), (float)link->position() );
                            //and all the views will update and display the right page at the right position
                        d->pressedLink = 0;
                    */
                }
                else
                    d->document->slotSetCurrentPage( page->pageNumber() );
            }
327 328 329 330
        }
        else if ( e->button() == Qt::RightButton && page )
        {
            // If over a page display a popup menu
331
            const KPDFPage * kpdfPage = page->page();
332 333 334 335 336 337 338 339 340 341 342
            KPopupMenu * m_popup = new KPopupMenu( this, "rmb popup" );
            m_popup->insertTitle( i18n( "Page %1" ).arg( page->pageNumber() ) );
            if ( kpdfPage->isBookmarked() )
                m_popup->insertItem( SmallIcon("bookmark"), i18n("Remove Bookmark"), 1 );
            else
                m_popup->insertItem( SmallIcon("bookmark"), i18n("Add Bookmark"), 1 );
            m_popup->insertItem( SmallIcon("viewmagfit"), i18n("Fit Page"), 2 );
            m_popup->insertItem( SmallIcon("pencil"), i18n("Edit"), 3 );
            switch ( m_popup->exec(QCursor::pos()) )
            {
            case 1:
343
                d->document->slotBookmarkPage( page->pageNumber(), !kpdfPage->isBookmarked() );
344
                break;
345 346 347 348
            case 2: // FIXME less hackish, please!
                d->aZoomFitWidth->setChecked( true );
                updateZoom( ZoomFitWidth );
                d->aViewTwoPages->setChecked( false );
349 350 351
                slotTwoPagesToggled( false );
                d->document->slotSetCurrentPage( page->pageNumber() );
                break;
352 353
            case 3: // TODO switch to edit mode
                slotSetMouseDraw();
354 355 356
                break;
            }
        }
357 358 359 360 361 362 363 364 365 366 367
        break;

    case MouseSelection: // ? d->page->setPixmapOverlaySelection( QRect ) ?

    case MouseEdit:      // ? apply [tool] ?
        break;
    }
}

void PageView::contentsMouseMoveEvent( QMouseEvent * e )
{
368
    bool leftButton = e->state() & LeftButton;
369 370 371
    switch ( d->mouseMode )
    {
    case MouseNormal:    // move page / change mouse cursor if over links
372
        if ( leftButton && !d->mouseGrabPos.isNull() )
373 374 375 376 377
        {
            QPoint delta = d->mouseGrabPos - e->globalPos();
            scrollBy( delta.x(), delta.y() );
            d->mouseGrabPos = e->globalPos();
        }
378
        if ( !leftButton )
379 380
        {
            // set cursor only when entering / leaving (setCursor has not an internal cache)
381 382
            PageWidget * pageWidget = pickPageOnPoint( e->x(), e->y() );
            if ( pageWidget )
383
            {
384 385 386 387 388 389 390
                const KPDFPage * page = pageWidget->page();
                bool onLink = page->hasLink( e->x() - childX( pageWidget ), e->y() - childY( pageWidget ) );
                if ( onLink != d->mouseOnLink )
                {
                    d->mouseOnLink = onLink;
                    setCursor( onLink ? pointingHandCursor : arrowCursor );
                }
391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
            }
        }
        break;

    case MouseSelection: // ? update selection contour ?

    case MouseEdit:      // ? update graphics ?
        break;
    }
}

void PageView::keyPressEvent( QKeyEvent * e )
{
    switch ( e->key() )
    {
    case Key_Up:
        if ( atTop() )
            scrollUp();
        else
            verticalScrollBar()->subtractLine();
        break;
    case Key_Down:
        if ( atBottom() )
            scrollDown();
        else
            verticalScrollBar()->addLine();
        break;
    case Key_Left:
        horizontalScrollBar()->subtractLine();
        break;
    case Key_Right:
        horizontalScrollBar()->addLine();
        break;
424 425 426 427 428
    case Key_PageUp:
        verticalScrollBar()->subtractPage();
        break;
    case Key_PageDown:
        verticalScrollBar()->addPage();
429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446
        break;
    default:
        e->ignore();
        return;
    }
    e->accept();
}

void PageView::wheelEvent( QWheelEvent *e )
{
    int delta = e->delta();
    e->accept();
    if ( (e->state() & ControlButton) == ControlButton ) {
        if ( e->delta() > 0 )
            slotZoomOut();
        else
            slotZoomIn();
    }
447
    else if ( delta <= -120 && atBottom() && !d->viewContinous )
448
        scrollDown();
449
    else if ( delta >= 120 && atTop() && !d->viewContinous )
450 451 452 453 454
        scrollUp();
    else
        QScrollView::wheelEvent( e );
}

455 456 457 458 459 460 461 462 463 464 465
void PageView::viewportResizeEvent( QResizeEvent * )
{
    // start a timer that will refresh the pixmap after 0.5s
    if ( !d->delayTimer )
    {
        d->delayTimer = new QTimer( this );
        connect( d->delayTimer, SIGNAL( timeout() ), this, SLOT( slotRelayoutPages() ) );
    }
    d->delayTimer->start( 400, true );
}

466 467 468 469 470 471 472 473 474 475 476 477 478 479
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

//BEGIN internal SLOTS
480
void PageView::slotZoom()
481
{
482
    updateZoom( ZoomFixed );
483 484 485 486
}

void PageView::slotZoomIn()
{
487
    updateZoom( ZoomIn );
488 489 490 491
}

void PageView::slotZoomOut()
{
492
    updateZoom( ZoomOut );
493 494 495 496
}

void PageView::slotFitToWidthToggled( bool on )
{
497
    if ( on ) updateZoom( ZoomFitWidth );
498 499 500 501
}

void PageView::slotFitToPageToggled( bool on )
{
502
    if ( on ) updateZoom( ZoomFitPage );
503 504 505 506
}

void PageView::slotFitToTextToggled( bool on )
{
507
    if ( on ) updateZoom( ZoomFitText );
508 509
}

510 511
void PageView::slotTwoPagesToggled( bool on )
{
512 513 514 515
    int newColumns = on ? 2 : 1;
    if ( d->viewColumns != newColumns )
    {
        d->viewColumns = newColumns;
516
        slotRelayoutPages();
517
    }
518 519
}

520 521
void PageView::slotContinousToggled( bool on )
{
522 523 524
    if ( d->viewContinous != on )
    {
        d->viewContinous = on;
525
        slotRelayoutPages();
526
    }
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
}

void PageView::slotSetMouseNormal()
{
    d->mouseMode = MouseNormal;
}

void PageView::slotSetMouseSelect()
{
    d->mouseMode = MouseSelection;
}

void PageView::slotSetMouseDraw()
{
    d->mouseMode = MouseEdit;
}

void PageView::slotToggleScrollBars( bool on )
{
    setHScrollBarMode( on ? AlwaysOn : AlwaysOff );
    setVScrollBarMode( on ? AlwaysOn : AlwaysOff );
}

550 551
void PageView::slotRelayoutPages()
// called by: pageSetup, viewportResizeEvent, slotTwoPagesToggled, slotContinousToggled, updateZoom
552 553 554 555 556 557 558 559 560 561
{
    // set an empty container if we have no pages
    int pageCount = d->pages.count();
    if ( pageCount < 1 )
    {
        resizeContents( 0,0 );
        return;
    }

    int viewportWidth = clipper()->width(),
562 563 564
        viewportHeight = clipper()->height(),
        fullWidth = 0,
        fullHeight = 0;
565 566

    if ( d->viewContinous == TRUE )
567
    {
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584
        // 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 = d->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
        QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
        for ( ; pIt != pEnd; ++pIt )
585
        {
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602
            PageWidget * p = *pIt;
            // update internal page geometry
            if ( d->zoomMode == ZoomFixed )
                p->setZoomFixed( d->zoomFactor );
            else if ( d->zoomMode == ZoomFitWidth )
                p->setZoomFitWidth( colWidth[ cIdx ] - 10 );
            else
                p->setZoomFitRect( colWidth[ cIdx ] - 10, viewportHeight - 10 );
            // find row's maximum height and column's max width
            int pWidth = p->widthHint(),
                pHeight = p->heightHint();
            if ( pWidth > colWidth[ cIdx ] )
                colWidth[ cIdx ] = pWidth;
            if ( pHeight > rowHeight[ rIdx ] )
                rowHeight[ rIdx ] = pHeight;
            // update col/row indices
            if ( ++cIdx == nCols )
603
            {
604 605
                cIdx = 0;
                rIdx++;
606 607
            }
        }
608 609 610

        // 2) arrange widgets inside cells
        int insertX = 0,
611
            insertY = (int)(2.0 + 4.0 * d->zoomFactor);
612 613 614 615 616 617 618 619 620 621 622 623
        cIdx = 0;
        rIdx = 0;
        for ( pIt = d->pages.begin(); pIt != pEnd; ++pIt )
        {
            PageWidget * p = *pIt;
            int pWidth = p->widthHint(),
                pHeight = p->heightHint(),
                cWidth = colWidth[ cIdx ],
                rHeight = rowHeight[ rIdx ];
            // show, resize and center widget inside 'cells'
            p->resize( pWidth, pHeight );
            moveChild( p, insertX + (cWidth - pWidth) / 2,
624
                       insertY + (rHeight - pHeight) / 2 );
625 626 627 628 629 630 631 632 633 634 635 636
            p->show();
            // advance col/row index
            insertX += cWidth;
            if ( ++cIdx == nCols )
            {
                cIdx = 0;
                rIdx++;
                insertX = 0;
                insertY += rHeight + (int)(5.0 + 15.0 * d->zoomFactor);
            }
        }

637
        fullHeight = cIdx ? (insertY + rowHeight[ rIdx ] + 10) : insertY;
638 639 640 641 642 643 644 645
        for ( int i = 0; i < nCols; i++ )
            fullWidth += colWidth[ i ];

        delete [] colWidth;
        delete [] rowHeight;
    }
    else // viewContinous is FALSE
    {
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716
        PageWidget * currentPage = d->page ? d->page : d->pages[0];

        // setup varialbles for a 1(row) x N(columns) grid
        int nCols = d->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
        QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
        for ( ; pIt != pEnd; ++pIt )
        {
            PageWidget * p = *pIt;
            if ( p == currentPage || (cIdx > 0 && cIdx < nCols) )
            {
                if ( d->zoomMode == ZoomFixed )
                    p->setZoomFixed( d->zoomFactor );
                else if ( d->zoomMode == ZoomFitWidth )
                    p->setZoomFitWidth( colWidth[ cIdx ] - 10 );
                else
                    p->setZoomFitRect( colWidth[ cIdx ] - 10, viewportHeight - 10 );
                if ( p->widthHint() > colWidth[ cIdx ] )
                    colWidth[ cIdx ] = p->widthHint();
                fullHeight = QMAX( fullHeight, p->heightHint() );
                cIdx++;
            }
        }

        // 2) hide all widgets except the displayable ones and dispose those
        int insertX = 0,
            insertY = (int)(2.0 + 4.0 * d->zoomFactor);
        cIdx = 0;
        for ( pIt = d->pages.begin(); pIt != pEnd; ++pIt )
        {
            PageWidget * p = *pIt;
            if ( p == currentPage || (cIdx > 0 && cIdx < nCols) )
            {
                int pWidth = p->widthHint(),
                    pHeight = p->heightHint();
                // show, resize and center widget inside 'cells'
                p->resize( pWidth, pHeight );
                moveChild( p, insertX + (colWidth[ cIdx ] - pWidth) / 2,
                           insertY + (fullHeight - pHeight) / 2 );
                p->show();
                // advance col/row index
                insertX += colWidth[ cIdx ];
                cIdx++;
            }
            else
                p->hide();
        }

        for ( int i = 0; i < nCols; i++ )
            fullWidth += colWidth[ i ];

        delete [] colWidth;
    }

    // 3) update scrollview's contents size and recenter view
    int oldWidth = contentsWidth(),
        oldHeight = contentsHeight();
    if ( oldWidth != fullWidth || oldHeight != fullHeight )
    {
        resizeContents( fullWidth, fullHeight );
        if ( oldWidth > 0 && oldHeight > 0 )
            center( fullWidth * (contentsX() + visibleWidth() / 2) / oldWidth,
                    fullHeight * (contentsY() + visibleHeight() / 2) / oldHeight );
        else
            center( fullWidth / 2, 0 );
717
    }
718 719

    // reset dirty state
720 721 722
    d->dirtyLayout = false;
}

723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745
void PageView::slotRequestVisiblePixmaps( int newLeft, int newTop )
{
    // precalc view limits for intersecting with page coords inside the lOOp
    int vLeft = (newLeft == -1) ? contentsX() : newLeft,
        vRight = vLeft + visibleWidth(),
        vTop = (newTop == -1) ? contentsY() : newTop,
        vBottom = vTop + visibleHeight();

    // scroll from the top to the last visible thumbnail
    QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
    for ( ; pIt != pEnd; ++pIt )
    {
        PageWidget * p = *pIt;
        int pLeft = childX( p ),
            pRight = pLeft + p->widthHint(),
            pTop = childY( p ),
            pBottom = pTop + p->heightHint();
        if ( p->isShown() && pRight > vLeft && pLeft < vRight && pBottom > vTop && pTop < vBottom )
            d->document->requestPixmap( PAGEVIEW_ID, p->pageNumber(), p->pixmapWidth(), p->pixmapHeight(), true );
    }
}
//END internal SLOTS

746 747 748 749
void PageView::updateZoom( ZoomMode newZoomMode )
{
    if ( newZoomMode == ZoomFixed )
    {
750
        if ( d->aZoom->currentItem() == 0 )
751
            newZoomMode = ZoomFitWidth;
752
        else if ( d->aZoom->currentItem() == 1 )
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
            newZoomMode = ZoomFitPage;
    }

    float newFactor = d->zoomFactor;
    KAction * checkedZoomAction = 0;
    switch ( newZoomMode )
    {
    case ZoomFixed:{
        QString z = d->aZoom->currentText();
        newFactor = KGlobal::locale()->readNumber( z.remove( z.find( '%' ), 1 ) ) / 100.0;
        if ( newFactor < 0.1 || newFactor > 8.0 )
            return;
        }break;
    case ZoomIn:
        newFactor += 0.1;
        if ( newFactor >= 4.0 )
            newFactor = 4.0;
        newZoomMode = ZoomFixed;
        break;
    case ZoomOut:
        newFactor -= 0.1;
        if ( newFactor <= 0.125 )
            newFactor = 0.125;
        newZoomMode = ZoomFixed;
        break;
    case ZoomFitWidth:
        checkedZoomAction = d->aZoomFitWidth;
        break;
    case ZoomFitPage:
        checkedZoomAction = d->aZoomFitPage;
        break;
    case ZoomFitText:
        checkedZoomAction = d->aZoomFitText;
        break;
    }

    if ( newZoomMode != d->zoomMode || (newZoomMode == ZoomFixed && newFactor != d->zoomFactor ) )
    {
        // rebuild layout and change the zoom selectAction contents
        d->zoomMode = newZoomMode;
        d->zoomFactor = newFactor;
        slotRelayoutPages();
        updateZoomText();
796
        // update actions checked state
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
        d->aZoomFitWidth->setChecked( checkedZoomAction == d->aZoomFitWidth );
        d->aZoomFitPage->setChecked( checkedZoomAction == d->aZoomFitPage );
        d->aZoomFitText->setChecked( checkedZoomAction == d->aZoomFitText );
        // request pixmaps
        slotRequestVisiblePixmaps();
    }
}

void PageView::updateZoomText()
{
    // use current page zoom as zoomFactor if in ZoomFit/* mode
    if ( d->zoomMode != ZoomFixed && d->pages.count() > 0 )
        d->zoomFactor = d->page ? d->page->zoomFactor() : d->pages[0]->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 - 0.001) )
            value = newFactor;
        else
            idx ++;
        if ( value > (newFactor - 0.001) && value < (newFactor + 0.001) )
            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 );
848 849
}

850 851 852 853 854 855 856 857 858 859 860 861
PageWidget * PageView::pickPageOnPoint( int x, int y )
{
    PageWidget * page = 0;
    QValueVector< PageWidget * >::iterator pIt = d->pages.begin(), pEnd = d->pages.end();
    for ( ; pIt != pEnd; ++pIt )
    {
        PageWidget * p = *pIt;
        int pLeft = childX( p ),
            pRight = pLeft + p->widthHint(),
            pTop = childY( p ),
            pBottom = pTop + p->heightHint();
        // little optimized, stops if found or probably quits on the next row
862
        if ( x > pLeft && x < pRight && y < pBottom && p->isShown() )
863 864 865 866 867 868 869 870 871
        {
            if ( y > pTop )
                page = p;
            break;
        }
    }
    return page;
}

872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908
bool PageView::atTop() const
{
    return verticalScrollBar()->value() == verticalScrollBar()->minValue();
}

bool PageView::atBottom() const
{
    return verticalScrollBar()->value() == verticalScrollBar()->maxValue();
}

void PageView::scrollUp()
{
    if( atTop() && d->vectorIndex > 0 )
        // go to the bottom of previous page
        d->document->slotSetCurrentPagePosition( d->pages[ d->vectorIndex - 1 ]->pageNumber(), 1.0 );
    else
    {   // go towards the top of current page
        int newValue = QMAX( verticalScrollBar()->value() - height() + 50,
                             verticalScrollBar()->minValue() );
        verticalScrollBar()->setValue( newValue );
    }
}

void PageView::scrollDown()
{
    if( atBottom() && d->vectorIndex < (int)d->pages.count() - 1 )
        // go to the top of previous page
        d->document->slotSetCurrentPagePosition( d->pages[ d->vectorIndex + 1 ]->pageNumber(), 0.0 );
    else
    {    // go towards the bottom of current page
        int newValue = QMIN( verticalScrollBar()->value() + height() - 50,
                             verticalScrollBar()->maxValue() );
        verticalScrollBar()->setValue( newValue );
    }
}

#include "pageview.moc"