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New feature: rotating pages in viewer

This commit is contained in:
Jakub Melka 2020-02-01 17:28:02 +01:00
parent af83f99f51
commit efca4a3cde
10 changed files with 356 additions and 34 deletions
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112
PdfForQtLib/sources/pdfdrawspacecontroller.cpp
View File

@ -37,6 +37,7 @@ PDFDrawSpaceController::PDFDrawSpaceController(QObject* parent) :
m_pageLayoutMode(PageLayout::OneColumn),
m_verticalSpacingMM(5.0),
m_horizontalSpacingMM(1.0),
m_pageRotation(PageRotation::None),
m_fontCache(DEFAULT_FONT_CACHE_LIMIT, DEFAULT_REALIZED_FONT_CACHE_LIMIT)
{
@ -137,6 +138,15 @@ QSizeF PDFDrawSpaceController::getReferenceBoundingBox() const
return rect.size();
}
void PDFDrawSpaceController::setPageRotation(PageRotation pageRotation)
{
if (m_pageRotation != pageRotation)
{
m_pageRotation = pageRotation;
recalculate();
}
}
void PDFDrawSpaceController::recalculate()
{
if (!m_document)
@ -148,19 +158,6 @@ void PDFDrawSpaceController::recalculate()
const PDFCatalog* catalog = m_document->getCatalog();
size_t pageCount = catalog->getPageCount();
// First, preserve page rotations. We assume the count of pages is the same as the document.
// Document should not be changed while viewing. If a new document is setted, then the draw
// space is cleared first.
std::vector<PageRotation> pageRotation(pageCount, PageRotation::None);
for (size_t i = 0; i < pageCount; ++i)
{
pageRotation[i] = catalog->getPage(i)->getPageRotation();
}
for (const LayoutItem& layoutItem : m_layoutItems)
{
pageRotation[layoutItem.pageIndex] = layoutItem.pageRotation;
}
// Clear the old draw space
clear(false);
@ -168,26 +165,26 @@ void PDFDrawSpaceController::recalculate()
// Places the pages on the left/right sides. Pages can be nullptr, but not both of them.
// Updates bounding rectangle.
auto placePagesLeftRight = [this, catalog, &pageRotation](PDFInteger blockIndex, size_t leftIndex, size_t rightIndex, PDFReal& yPos, QRectF& boundingRect)
auto placePagesLeftRight = [this, catalog](PDFInteger blockIndex, size_t leftIndex, size_t rightIndex, PDFReal& yPos, QRectF& boundingRect)
{
PDFReal yPosAdvance = 0.0;
if (leftIndex != INVALID_PAGE_INDEX)
{
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(leftIndex)->getMediaBoxMM(), pageRotation[leftIndex]).size();
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(leftIndex)->getRotatedMediaBoxMM(), m_pageRotation).size();
PDFReal xPos = -pageSize.width() - m_horizontalSpacingMM * 0.5;
QRectF rect(xPos, yPos, pageSize.width(), pageSize.height());
m_layoutItems.emplace_back(blockIndex, leftIndex, pageRotation[leftIndex], rect);
m_layoutItems.emplace_back(blockIndex, leftIndex, rect);
yPosAdvance = qMax(yPosAdvance, pageSize.height());
boundingRect = boundingRect.united(rect);
}
if (rightIndex != INVALID_PAGE_INDEX)
{
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(rightIndex)->getMediaBoxMM(), pageRotation[rightIndex]).size();
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(rightIndex)->getRotatedMediaBoxMM(), m_pageRotation).size();
PDFReal xPos = m_horizontalSpacingMM * 0.5;
QRectF rect(xPos, yPos, pageSize.width(), pageSize.height());
m_layoutItems.emplace_back(blockIndex, rightIndex, pageRotation[rightIndex], rect);
m_layoutItems.emplace_back(blockIndex, rightIndex, rect);
yPosAdvance = qMax(yPosAdvance, pageSize.height());
boundingRect = boundingRect.united(rect);
}
@ -247,9 +244,9 @@ void PDFDrawSpaceController::recalculate()
for (size_t i = 0; i < pageCount; ++i)
{
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(i)->getMediaBoxMM(), pageRotation[i]).size();
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(i)->getRotatedMediaBoxMM(), m_pageRotation).size();
QRectF rect(-pageSize.width() * 0.5, -pageSize.height() * 0.5, pageSize.width(), pageSize.height());
m_layoutItems.emplace_back(i, i, pageRotation[i], rect);
m_layoutItems.emplace_back(i, i, rect);
m_blockItems.emplace_back(rect);
}
@ -268,9 +265,9 @@ void PDFDrawSpaceController::recalculate()
for (size_t i = 0; i < pageCount; ++i)
{
// Top of current page is at yPos.
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(i)->getMediaBoxMM(), pageRotation[i]).size();
QSizeF pageSize = PDFPage::getRotatedBox(catalog->getPage(i)->getRotatedMediaBoxMM(), m_pageRotation).size();
QRectF rect(-pageSize.width() * 0.5, yPos, pageSize.width(), pageSize.height());
m_layoutItems.emplace_back(0, i, pageRotation[i], rect);
m_layoutItems.emplace_back(0, i, rect);
yPos += pageSize.height() + m_verticalSpacingMM;
boundingRectangle = boundingRectangle.united(rect);
}
@ -491,7 +488,7 @@ void PDFDrawWidgetProxy::update()
m_layout.items.reserve(items.size());
for (const PDFDrawSpaceController::LayoutItem& item : items)
{
m_layout.items.emplace_back(item.pageIndex, item.pageRotation, fromDeviceSpace(item.pageRectMM).toRect());
m_layout.items.emplace_back(item.pageIndex, fromDeviceSpace(item.pageRectMM).toRect());
}
m_layout.blockRect = fromDeviceSpace(rectangle).toRect();
@ -594,6 +591,59 @@ void PDFDrawWidgetProxy::update()
emit drawSpaceChanged();
}
QMatrix PDFDrawWidgetProxy::createPagePointToDevicePointMatrix(const PDFPage* page, const QRectF& rectangle) const
{
QMatrix matrix;
// We want to create transformation from unrotated rectangle
// to rotated page rectangle.
QRectF unrotatedRectangle = rectangle;
switch (m_controller->getPageRotation())
{
case PageRotation::None:
break;
case PageRotation::Rotate180:
{
matrix.translate(0, rectangle.top() + rectangle.bottom());
matrix.scale(1.0, -1.0);
Q_ASSERT(qFuzzyCompare(matrix.map(rectangle.topLeft()).y(), rectangle.bottom()));
Q_ASSERT(qFuzzyCompare(matrix.map(rectangle.bottomLeft()).y(), rectangle.top()));
break;
}
case PageRotation::Rotate90:
{
unrotatedRectangle = rectangle.transposed();
matrix.translate(rectangle.left(), rectangle.top());
matrix.rotate(90);
matrix.translate(-rectangle.left(), -rectangle.top());
matrix.translate(0, -unrotatedRectangle.height());
break;
}
case PageRotation::Rotate270:
{
unrotatedRectangle = rectangle.transposed();
matrix.translate(rectangle.left(), rectangle.top());
matrix.rotate(90);
matrix.translate(-rectangle.left(), -rectangle.top());
matrix.translate(0, -unrotatedRectangle.height());
matrix.translate(0.0, unrotatedRectangle.top() + unrotatedRectangle.bottom());
matrix.scale(1.0, -1.0);
matrix.translate(unrotatedRectangle.left() + unrotatedRectangle.right(), 0.0);
matrix.scale(-1.0, 1.0);
break;
}
default:
break;
}
return PDFRenderer::createPagePointToDevicePointMatrix(page, unrotatedRectangle) * matrix;
}
void PDFDrawWidgetProxy::draw(QPainter* painter, QRect rect)
{
painter->fillRect(rect, Qt::lightGray);
@ -624,7 +674,7 @@ void PDFDrawWidgetProxy::draw(QPainter* painter, QRect rect)
timer.start();
const PDFPage* page = m_controller->getDocument()->getCatalog()->getPage(item.pageIndex);
QMatrix matrix = PDFRenderer::createPagePointToDevicePointMatrix(page, placedRect);
QMatrix matrix = createPagePointToDevicePointMatrix(page, placedRect);
compiledPage->draw(painter, page->getCropBox(), matrix, m_features);
PDFTextLayoutGetter layoutGetter = m_textLayoutCompiler->getTextLayoutLazy(item.pageIndex);
@ -802,7 +852,7 @@ PDFInteger PDFDrawWidgetProxy::getPageUnderPoint(QPoint point, QPointF* pagePoin
if (pagePoint)
{
const PDFPage* page = m_controller->getDocument()->getCatalog()->getPage(item.pageIndex);
QMatrix matrix = PDFRenderer::createPagePointToDevicePointMatrix(page, placedRect).inverted();
QMatrix matrix = createPagePointToDevicePointMatrix(page, placedRect).inverted();
*pagePoint = matrix.map(point);
}
@ -921,6 +971,18 @@ void PDFDrawWidgetProxy::performOperation(Operation operation)
break;
}
case RotateRight:
{
m_controller->setPageRotation(getPageRotationRotatedRight(m_controller->getPageRotation()));
break;
}
case RotateLeft:
{
m_controller->setPageRotation(getPageRotationRotatedLeft(m_controller->getPageRotation()));
break;
}
default:
{
Q_ASSERT(false);

31
PdfForQtLib/sources/pdfdrawspacecontroller.h
View File

@ -97,15 +97,14 @@ public:
/// page and page rectangle, in which the page is contained.
struct LayoutItem
{
constexpr inline explicit LayoutItem() : blockIndex(-1), pageIndex(-1), pageRotation(PageRotation::None) { }
constexpr inline explicit LayoutItem(PDFInteger blockIndex, PDFInteger pageIndex, PageRotation rotation, const QRectF& pageRectMM) :
blockIndex(blockIndex), pageIndex(pageIndex), pageRotation(rotation), pageRectMM(pageRectMM) { }
constexpr inline explicit LayoutItem() : blockIndex(-1), pageIndex(-1) { }
constexpr inline explicit LayoutItem(PDFInteger blockIndex, PDFInteger pageIndex, const QRectF& pageRectMM) :
blockIndex(blockIndex), pageIndex(pageIndex), pageRectMM(pageRectMM) { }
bool isValid() const { return pageIndex != -1; }
PDFInteger blockIndex;
PDFInteger pageIndex;
PageRotation pageRotation;
QRectF pageRectMM;
};
@ -138,6 +137,12 @@ public:
/// any page on the screen will fit this bounding box, regardless of mode (single/two columns, etc.).
QSizeF getReferenceBoundingBox() const;
/// Returns page rotation
PageRotation getPageRotation() const { return m_pageRotation; }
/// Sets page rotation
void setPageRotation(PageRotation pageRotation);
signals:
void drawSpaceChanged();
void repaintNeeded();
@ -169,6 +174,7 @@ private:
BlockItems m_blockItems;
PDFReal m_verticalSpacingMM;
PDFReal m_horizontalSpacingMM;
PageRotation m_pageRotation;
/// Font cache
PDFFontCache m_fontCache;
@ -196,6 +202,12 @@ public:
/// Updates the draw space area
void update();
/// Creates page point to device point matrix for the given rectangle. It creates transformation
/// from page's media box to the target rectangle.
/// \param page Page, for which we want to create matrix
/// \param rectangle Page rectangle, to which is page media box transformed
QMatrix createPagePointToDevicePointMatrix(const PDFPage* page, const QRectF& rectangle) const;
/// Draws the actually visible pages on the painter using the rectangle.
/// Rectangle is space in the widget, which is used for painting the PDF.
/// \param painter Painter to paint the PDF pages
@ -220,7 +232,9 @@ public:
NavigateNextPage,
NavigatePreviousPage,
NavigateNextStep,
NavigatePreviousStep
NavigatePreviousStep,
RotateRight,
RotateLeft
};
/// Performs the desired operation (for example navigation).
@ -329,13 +343,12 @@ signals:
private:
struct LayoutItem
{
constexpr inline explicit LayoutItem() : pageIndex(-1), pageRotation(PageRotation::None) { }
constexpr inline explicit LayoutItem(PDFInteger pageIndex, PageRotation rotation, const QRect& pageRect) :
pageIndex(pageIndex), pageRotation(rotation), pageRect(pageRect) { }
constexpr inline explicit LayoutItem() : pageIndex(-1) { }
constexpr inline explicit LayoutItem(PDFInteger pageIndex, const QRect& pageRect) :
pageIndex(pageIndex), pageRect(pageRect) { }
PDFInteger pageIndex;
PageRotation pageRotation;
QRect pageRect;
};

5
PdfForQtLib/sources/pdfpage.cpp
View File

@ -121,6 +121,11 @@ QRectF PDFPage::getRotatedMediaBox() const
return getRotatedBox(getMediaBox(), getPageRotation());
}
QRectF PDFPage::getRotatedMediaBoxMM() const
{
return getRotatedBox(getMediaBoxMM(), getPageRotation());
}
QRectF PDFPage::getRotatedCropBox() const
{
return getRotatedBox(getCropBox(), getPageRotation());

35
PdfForQtLib/sources/pdfpage.h
View File

@ -39,6 +39,40 @@ enum class PageRotation
Rotate270
};
constexpr PageRotation getPageRotationRotatedRight(PageRotation rotation)
{
switch (rotation)
{
case PageRotation::None:
return PageRotation::Rotate90;
case PageRotation::Rotate90:
return PageRotation::Rotate180;
case PageRotation::Rotate180:
return PageRotation::Rotate270;
case PageRotation::Rotate270:
return PageRotation::None;
}
return PageRotation::None;
}
constexpr PageRotation getPageRotationRotatedLeft(PageRotation rotation)
{
switch (rotation)
{
case PageRotation::None:
return PageRotation::Rotate270;
case PageRotation::Rotate90:
return PageRotation::None;
case PageRotation::Rotate180:
return PageRotation::Rotate90;
case PageRotation::Rotate270:
return PageRotation::Rotate180;
}
return PageRotation::None;
}
/// This class represents attributes, which are inheritable. Also allows merging from
/// parents.
class PDFPageInheritableAttributes
@ -97,6 +131,7 @@ public:
inline PDFObjectReference getPageReference() const { return m_pageReference; }
QRectF getRotatedMediaBox() const;
QRectF getRotatedMediaBoxMM() const;
QRectF getRotatedCropBox() const;
static QRectF getRotatedBox(const QRectF& rect, PageRotation rotation);

2
PdfForQtViewer/pdfforqtviewer.qrc
View File

@ -33,5 +33,7 @@
<file>resources/find-previous.svg</file>
<file>resources/select-text.svg</file>
<file>resources/ui.svg</file>
<file>resources/rotate-left.svg</file>
<file>resources/rotate-right.svg</file>
</qresource>
</RCC>

12
PdfForQtViewer/pdfviewermainwindow.cpp
View File

@ -107,6 +107,8 @@ PDFViewerMainWindow::PDFViewerMainWindow(QWidget* parent) :
ui->actionSelectTextAll->setShortcut(QKeySequence::SelectAll);
ui->actionDeselectText->setShortcut(QKeySequence::Deselect);
ui->actionCopyText->setShortcut(QKeySequence::Copy);
ui->actionRotateRight->setShortcut(QKeySequence("Ctrl+Shift++"));
ui->actionRotateLeft->setShortcut(QKeySequence("Ctrl+Shift+-"));
for (QAction* action : m_recentFileManager->getActions())
{
@ -1146,4 +1148,14 @@ void PDFViewerMainWindow::on_actionSend_by_E_Mail_triggered()
}
}
void PDFViewerMainWindow::on_actionRotateRight_triggered()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::RotateRight);
}
void PDFViewerMainWindow::on_actionRotateLeft_triggered()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::RotateLeft);
}
} // namespace pdfviewer

4
PdfForQtViewer/pdfviewermainwindow.h
View File

@ -92,6 +92,10 @@ private slots:
void on_actionProperties_triggered();
void on_actionSend_by_E_Mail_triggered();
void on_actionRotateRight_triggered();
void on_actionRotateLeft_triggered();
private:
void onActionOpenTriggered();
void onActionCloseTriggered();

21
PdfForQtViewer/pdfviewermainwindow.ui
View File

@ -68,6 +68,9 @@
<addaction name="menuPage_Layout"/>
<addaction name="menuRendering_Options"/>
<addaction name="separator"/>
<addaction name="actionRotateRight"/>
<addaction name="actionRotateLeft"/>
<addaction name="separator"/>
<addaction name="actionZoom_In"/>
<addaction name="actionZoom_Out"/>
<addaction name="separator"/>
@ -419,6 +422,24 @@
<string>Invert Colors</string>
</property>
</action>
<action name="actionRotateRight">
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/rotate-right.svg</normaloff>:/resources/rotate-right.svg</iconset>
</property>
<property name="text">
<string>Rotate Right</string>
</property>
</action>
<action name="actionRotateLeft">
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/rotate-left.svg</normaloff>:/resources/rotate-left.svg</iconset>
</property>
<property name="text">
<string>Rotate Left</string>
</property>
</action>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources>

84
PdfForQtViewer/resources/rotate-left.svg Normal file
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