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Improvements to zoom behaviour

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No need for double digit precision in the UI
ZoomIn/ZoomOut moves you through the well known steps + fit page, fit width; if you need any other you can always write it manually or use MMB zoom
BUGS: 323434
BUGS: 323435
FIXED-IN: 4.14.0
REVIEW: 112370
This commit is contained in:
Tingnan Zhang 2014-05-06 00:43:40 +02:00 committed by Albert Astals Cid
parent df9be6b2a5
commit fad9c4e6fd
2 changed files with 79 additions and 16 deletions
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93
ui/pageview.cpp
View file

@ -89,6 +89,8 @@ static int pageflags = PagePainter::Accessibility | PagePainter::EnhanceLinks |
PagePainter::EnhanceImages | PagePainter::Highlights |
PagePainter::TextSelection | PagePainter::Annotations;
static const float kZoomValues[] = { 0.12, 0.25, 0.33, 0.50, 0.66, 0.75, 1.00, 1.25, 1.50, 2.00, 4.00, 8.00, 16.00 };
static inline double normClamp( double value, double def )
{
return ( value < 0.0 || value > 1.0 ) ? def : value;
@ -3595,6 +3597,37 @@ void PageView::selectionClear(const ClearMode mode)
viewport()->update( updatedRect );
}
// const to be used for both zoomFactorFitMode function and slotRelayoutPages.
static const int kcolWidthMargin = 6;
static const int krowHeightMargin = 12;
double PageView::zoomFactorFitMode( ZoomMode mode )
{
const int pageCount = d->items.count();
if ( pageCount == 0 )
return 0;
const bool facingCentered = Okular::Settings::viewMode() == Okular::Settings::EnumViewMode::FacingFirstCentered || (Okular::Settings::viewMode() == Okular::Settings::EnumViewMode::Facing && pageCount == 1);
const bool overrideCentering = facingCentered && pageCount < 3;
const int nCols = overrideCentering ? 1 : viewColumns();
const double colWidth = viewport()->width() / nCols - kcolWidthMargin;
const double rowHeight = viewport()->height() - krowHeightMargin;
const PageViewItem * currentItem = d->items[ qMax( 0, (int)d->document->currentPage()) ];
// prevent segmentation fault when openning a new document;
if ( !currentItem )
return 0;
const Okular::Page * okularPage = currentItem->page();
const double width = okularPage->width(), height = okularPage->height();
if ( mode == ZoomFitWidth )
return (double) colWidth / width;
if ( mode == ZoomFitPage )
{
const double scaleW = (double) colWidth / (double)width;
const double scaleH = (double) rowHeight / (double)height;
return qMin(scaleW, scaleH);
}
return 0;
}
void PageView::updateZoom( ZoomMode newZoomMode )
{
if ( newZoomMode == ZoomFixed )
@ -3619,12 +3652,40 @@ void PageView::updateZoom( ZoomMode newZoomMode )
newFactor = KGlobal::locale()->readNumber( z ) / 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 > 1.01) ? ( newFactor > 2.01 ? 0.5 : 0.2 ) : 0.1;
newZoomMode = ZoomFixed;
case ZoomOut:{
const float zoomFactorFitWidth = zoomFactorFitMode(ZoomFitWidth);
const float zoomFactorFitPage = zoomFactorFitMode(ZoomFitPage);
QVector<float> zoomValue(15);
qCopy(kZoomValues, kZoomValues + 13, zoomValue.begin());
zoomValue[13] = zoomFactorFitWidth;
zoomValue[14] = zoomFactorFitPage;
qSort(zoomValue.begin(), zoomValue.end());
QVector<float>::iterator i;
if ( newZoomMode == ZoomOut )
{
i = qLowerBound(zoomValue.begin(), zoomValue.end(), newFactor) - 1;
}
else
{
i = qUpperBound(zoomValue.begin(), zoomValue.end(), newFactor);
}
const float tmpFactor = *i;
if ( tmpFactor == zoomFactorFitWidth )
{
newZoomMode = ZoomFitWidth;
checkedZoomAction = d->aZoomFitWidth;
}
else if ( tmpFactor == zoomFactorFitPage )
{
newZoomMode = ZoomFitPage;
checkedZoomAction = d->aZoomFitPage;
}
else
{
newFactor = tmpFactor;
newZoomMode = ZoomFixed;
}
}
break;
case ZoomFitWidth:
checkedZoomAction = d->aZoomFitWidth;
@ -3688,8 +3749,7 @@ void PageView::updateZoomText()
translated << i18n("Fit Width") << i18n("Fit Page") << i18n("Auto Fit");
// add percent items
QString double_oh( "00" );
const float zoomValue[13] = { 0.12, 0.25, 0.33, 0.50, 0.66, 0.75, 1.00, 1.25, 1.50, 2.00, 4.00, 8.00, 16.00 };
const QString single_oh( "0" );
int idx = 0, selIdx = 3;
bool inserted = false; //use: "d->zoomMode != ZoomFixed" to hide Fit/* zoom ratio
int zoomValueCount = 11;
@ -3697,7 +3757,7 @@ void PageView::updateZoomText()
zoomValueCount = 13;
while ( idx < zoomValueCount || !inserted )
{
float value = idx < zoomValueCount ? zoomValue[ idx ] : newFactor;
float value = idx < zoomValueCount ? kZoomValues[ idx ] : newFactor;
if ( !inserted && newFactor < (value - 0.0001) )
value = newFactor;
else
@ -3706,8 +3766,9 @@ void PageView::updateZoomText()
inserted = true;
if ( !inserted )
selIdx++;
QString localValue( KGlobal::locale()->formatNumber( value * 100.0, 2 ) );
localValue.remove( KGlobal::locale()->decimalSymbol() + double_oh );
// we do not need to display 2-digit precision
QString localValue( KGlobal::locale()->formatNumber( value * 100.0, 1 ) );
localValue.remove( KGlobal::locale()->decimalSymbol() + single_oh );
// remove a trailing zero in numbers like 66.70
if ( localValue.right( 1 ) == QLatin1String( "0" ) && localValue.indexOf( KGlobal::locale()->decimalSymbol() ) > -1 )
localValue.chop( 1 );
@ -4066,12 +4127,12 @@ void PageView::slotRelayoutPages()
{
PageViewItem * item = *iIt;
// update internal page size (leaving a little margin in case of Fit* modes)
updateItemSize( item, colWidth[ cIdx ] - 6, viewportHeight - 12 );
updateItemSize( item, colWidth[ cIdx ] - kcolWidthMargin, viewportHeight - krowHeightMargin );
// find row's maximum height and column's max width
if ( item->croppedWidth() + 6 > colWidth[ cIdx ] )
colWidth[ cIdx ] = item->croppedWidth() + 6;
if ( item->croppedHeight() + 12 > rowHeight[ rIdx ] )
rowHeight[ rIdx ] = item->croppedHeight() + 12;
if ( item->croppedWidth() + kcolWidthMargin > colWidth[ cIdx ] )
colWidth[ cIdx ] = item->croppedWidth() + kcolWidthMargin;
if ( item->croppedHeight() + krowHeightMargin > rowHeight[ rIdx ] )
rowHeight[ rIdx ] = item->croppedHeight() + krowHeightMargin;
// handle the 'centering on first row' stuff
// update col/row indices
if ( ++cIdx == nCols )

2
ui/pageview.h
View file

@ -174,6 +174,8 @@ Q_OBJECT
void guessTableDividers();
// update either text or rectangle selection
void updateSelection( const QPoint & pos );
// compute the zoom factor value for FitWidth and FitPage mode
double zoomFactorFitMode( ZoomMode mode );
// update internal zoom values and end in a slotRelayoutPages();
void updateZoom( ZoomMode newZm );
// update the text on the label using global zoom value or current page's one