File indexing completed on 2024-05-05 04:21:19

 
 /*
    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 
 #define DEBUG_KP_UNZOOMED_THUMBNAIL_VIEW 0
 
 
 #include "views/kpUnzoomedThumbnailView.h"
 
 #include "kpLogCategories.h"
 #include "document/kpDocument.h"
 #include "views/manager/kpViewManager.h"
 #include "kpViewScrollableContainer.h"
 
 #include <QScrollBar>
 
 #include <KLocalizedString>
 
 //---------------------------------------------------------------------
 
 struct kpUnzoomedThumbnailViewPrivate
 {
 };
 
 
 kpUnzoomedThumbnailView::kpUnzoomedThumbnailView (
         kpDocument *document,
         kpToolToolBar *toolToolBar,
         kpViewManager *viewManager,
         kpView *buddyView,
         kpViewScrollableContainer *scrollableContainer,
         QWidget *parent)
 
     : kpThumbnailView (document, toolToolBar, viewManager,
                        buddyView,
                        scrollableContainer,
                        parent),
       d (new kpUnzoomedThumbnailViewPrivate ())
 {
     if (buddyViewScrollableContainer ())
     {
         connect (buddyViewScrollableContainer(), &kpViewScrollableContainer::contentsMoved,
                  this, &kpUnzoomedThumbnailView::adjustToEnvironment);
     }
 
     // Call to virtual function - this is why the class is sealed
     adjustToEnvironment ();
 }
 
 //---------------------------------------------------------------------
 
 kpUnzoomedThumbnailView::~kpUnzoomedThumbnailView ()
 {
     delete d;
 }
 
 //---------------------------------------------------------------------
 
 // public virtual [base kpThumbnailView]
 QString kpUnzoomedThumbnailView::caption () const
 {
     return i18n ("Unzoomed Mode - Thumbnail");
 }
 
 //---------------------------------------------------------------------
 
 // public slot virtual [base kpView]
 void kpUnzoomedThumbnailView::adjustToEnvironment ()
 {
     if (!buddyView () || !buddyViewScrollableContainer () || !document ()) {
         return;
     }
 
     const int scrollViewContentsX =
         buddyViewScrollableContainer()->horizontalScrollBar()->value();
     const int scrollViewContentsY =
         buddyViewScrollableContainer ()->verticalScrollBar()->value();
 
 #if DEBUG_KP_UNZOOMED_THUMBNAIL_VIEW
     qCDebug(kpLogViews) << "kpUnzoomedThumbnailView(" << name ()
                << ")::adjustToEnvironment("
                << scrollViewContentsX
                << ","
                << scrollViewContentsY
                << ") width=" << width ()
                << " height=" << height ()
                << endl;
 #endif
 
 
 #if 1
     int x;
     if (document ()->width () > width ())
     {
         x = static_cast<int> (buddyView ()->transformViewToDocX (scrollViewContentsX));
         const int rightMostAllowedX = qMax (0, document ()->width () - width ());
     #if DEBUG_KP_UNZOOMED_THUMBNAIL_VIEW
         qCDebug(kpLogViews) << "\tdocX=" << x
                 << " docWidth=" << document ()->width ()
                 << " rightMostAllowedX=" << rightMostAllowedX;
     #endif
         if (x > rightMostAllowedX) {
             x = rightMostAllowedX;
         }
     }
     // Thumbnail width <= doc width
     else
     {
         // Center X (rather than flush left to be consistent with
         //           kpZoomedThumbnailView)
         x = -(width () - document ()->width ()) / 2;
     }
 
 
     int y;
     if (document ()->height () > height ())
     {
         y = static_cast<int> (buddyView ()->transformViewToDocY (scrollViewContentsY));
         const int bottomMostAllowedY = qMax (0, document ()->height () - height ());
     #if DEBUG_KP_UNZOOMED_THUMBNAIL_VIEW
         qCDebug(kpLogViews) << "\tdocY=" << y
                     << " docHeight=" << document ()->height ()
                     << " bottomMostAllowedY=" << bottomMostAllowedY;
     #endif
         if (y > bottomMostAllowedY) {
             y = bottomMostAllowedY;
         }
     }
     // Thumbnail height <= doc height
     else
     {
         // Center Y (rather than flush top to be consistent with
         //           kpZoomedThumbnailView)
         y = -(height () - document ()->height ()) / 2;
     }
 // Prefer to keep visible area centred in thumbnail instead of flushed left.
 // Gives more editing context to the left and top.
 // But feels awkward for left-to-right users.  So disabled for now.
 // Not totally tested.
 #else
     if (!buddyViewScrollableContainer ()) {
         return;
     }
 
     QRect docRect = buddyView ()->transformViewToDoc (
         QRect (buddyViewScrollableContainer ()->horizontalScrollBar()->value(),
                buddyViewScrollableContainer ()->verticalScrollBar()->value(),
                qMin (buddyView ()->width (), buddyViewScrollableContainer ()->viewport()->width ()),
                qMin (buddyView ()->height (), buddyViewScrollableContainer ()->viewport()->height ())));
 
     x = docRect.x () - (width () - docRect.width ()) / 2;
     qCDebug(kpLogViews) << "\tnew suggest x=" << x;
     const int rightMostAllowedX = qMax (0, document ()->width () - width ());
     if (x < 0) {
         x = 0;
     }
     if (x > rightMostAllowedX) {
         x = rightMostAllowedX;
     }
 
     y = docRect.y () - (height () - docRect.height ()) / 2;
     qCDebug(kpLogViews) << "\tnew suggest y=" << y;
     const int bottomMostAllowedY = qMax (0, document ()->height () - height ());
     if (y < 0) {
         y = 0;
     }
     if (y > bottomMostAllowedY) {
         y = bottomMostAllowedY;
     }
 #endif
 
 
     if (viewManager ())
     {
         viewManager ()->setFastUpdates ();
         viewManager ()->setQueueUpdates ();
     }
 
     {
         // OPT: scrollView impl would be much, much faster
         setOrigin (QPoint (-x, -y));
         setMaskToCoverDocument ();
 
         // Above might be a NOP even if e.g. doc size changed so force
         // update
         if (viewManager ()) {
             viewManager ()->updateView (this);
         }
     }
 
     if (viewManager ())
     {
         viewManager ()->restoreQueueUpdates ();
         viewManager ()->restoreFastUpdates ();
     }
 }
 
 #include "moc_kpUnzoomedThumbnailView.cpp"