Thumbnails - first part

PdfForQtLib/sources/pdfdrawspacecontroller.cpp

@@ -49,7 +49,7 @@ void PDFDrawSpaceController::setDocument(const PDFDocument* document, const PDFO
         m_document = document;
         m_fontCache.setDocument(document);
         m_optionalContentActivity = optionalContentActivity;
-        connect(m_optionalContentActivity, &PDFOptionalContentActivity::optionalContentGroupStateChanged, this, &PDFDrawSpaceController::repaintNeeded);
+        connect(m_optionalContentActivity, &PDFOptionalContentActivity::optionalContentGroupStateChanged, this, &PDFDrawSpaceController::onOptionalContentGroupStateChanged);
         recalculate();
     }
 }
@@ -133,6 +133,12 @@ QSizeF PDFDrawSpaceController::getReferenceBoundingBox() const
     return rect.size();
 }
 
+void PDFDrawSpaceController::onOptionalContentGroupStateChanged()
+{
+    emit pageImageChanged(true, { });
+    emit repaintNeeded();
+}
+
 void PDFDrawSpaceController::recalculate()
 {
     if (!m_document)
@@ -393,6 +399,7 @@ PDFDrawWidgetProxy::PDFDrawWidgetProxy(QObject* parent) :
     m_controller = new PDFDrawSpaceController(this);
     connect(m_controller, &PDFDrawSpaceController::drawSpaceChanged, this, &PDFDrawWidgetProxy::update);
     connect(m_controller, &PDFDrawSpaceController::repaintNeeded, this, &PDFDrawWidgetProxy::repaintNeeded);
+    connect(m_controller, &PDFDrawSpaceController::pageImageChanged, this, &PDFDrawWidgetProxy::pageImageChanged);
 }
 
 PDFDrawWidgetProxy::~PDFDrawWidgetProxy()
@@ -603,6 +610,36 @@ void PDFDrawWidgetProxy::draw(QPainter* painter, QRect rect)
     }
 }
 
+QImage PDFDrawWidgetProxy::drawThumbnailImage(PDFInteger pageIndex, int pixelSize) const
+{
+    QImage image;
+    if (!m_controller->getDocument())
+    {
+        // No thumbnail - return empty image
+        return image;
+    }
+
+    if (const PDFPage* page = m_controller->getDocument()->getCatalog()->getPage(pageIndex))
+    {
+        QRectF pageRect = page->getRotatedMediaBox();
+        QSizeF pageSize = pageRect.size();
+        pageSize.scale(pixelSize, pixelSize, Qt::KeepAspectRatio);
+        QSize imageSize = pageSize.toSize();
+
+        if (imageSize.isValid())
+        {
+            image = QImage(imageSize, QImage::Format_RGBA8888_Premultiplied);
+            image.fill(Qt::white);
+
+            QPainter painter(&image);
+            PDFRenderer renderer(m_controller->getDocument(), m_controller->getFontCache(), m_controller->getOptionalContentActivity(), m_features, m_meshQualitySettings);
+            renderer.render(&painter, QRect(QPoint(0, 0), imageSize), pageIndex);
+        }
+    }
+
+    return image;
+}
+
 std::vector<PDFInteger> PDFDrawWidgetProxy::getPagesIntersectingRect(QRect rect) const
 {
     std::vector<PDFInteger> pages;

PdfForQtLib/sources/pdfdrawspacecontroller.h

@@ -113,8 +113,11 @@ public:
 signals:
     void drawSpaceChanged();
     void repaintNeeded();
+    void pageImageChanged(bool all, const std::vector<PDFInteger>& pages);
 
 private:
+    void onOptionalContentGroupStateChanged();
+
     /// Recalculates the draw space. Preserves setted page rotation.
     void recalculate();
 
@@ -176,6 +179,12 @@ public:
     /// \param rect Rectangle in which the content is painted
     void draw(QPainter* painter, QRect rect);
 
+    /// Draws thumbnail image of the given size (so larger of the page size
+    /// width or height equals to pixel size and the latter size is rescaled
+    /// using the aspect ratio)
+    /// \param pixelSize Pixel size
+    QImage drawThumbnailImage(PDFInteger pageIndex, int pixelSize) const;
+
     enum Operation
     {
         ZoomIn,
@@ -260,6 +269,7 @@ signals:
     void pageLayoutChanged();
     void renderingError(PDFInteger pageIndex, const QList<PDFRenderError>& errors);
     void repaintNeeded();
+    void pageImageChanged(bool all, const std::vector<PDFInteger>& pages);
 
 private:
     struct LayoutItem

PdfForQtLib/sources/pdfitemmodels.cpp

@@ -17,6 +17,7 @@
 
 #include "pdfitemmodels.h"
 #include "pdfdocument.h"
+#include "pdfdrawspacecontroller.h"
 
 #include <QFont>
 #include <QStyle>
@@ -614,4 +615,160 @@ const PDFFileSpecification* PDFAttachmentsTreeItemModel::getFileSpecification(co
     return nullptr;
 }
 
+PDFThumbnailsItemModel::PDFThumbnailsItemModel(const PDFDrawWidgetProxy* proxy, QObject* parent) :
+    QAbstractItemModel(parent),
+    m_proxy(proxy),
+    m_thumbnailSize(100),
+    m_extraItemWidthHint(0),
+    m_extraItemHeighHint(0),
+    m_pageCount(0),
+    m_document(nullptr)
+{
+    connect(proxy, &PDFDrawWidgetProxy::pageImageChanged, this, &PDFThumbnailsItemModel::onPageImageChanged);
+}
+
+bool PDFThumbnailsItemModel::isEmpty() const
+{
+    return rowCount(QModelIndex()) == 0;
+}
+
+QModelIndex PDFThumbnailsItemModel::index(int row, int column, const QModelIndex& parent) const
+{
+    if (parent.isValid())
+    {
+        return QModelIndex();
+    }
+
+    return createIndex(row, column, nullptr);
+}
+
+QModelIndex PDFThumbnailsItemModel::parent(const QModelIndex& child) const
+{
+    Q_UNUSED(child);
+    return QModelIndex();
+}
+
+int PDFThumbnailsItemModel::rowCount(const QModelIndex& parent) const
+{
+    if (parent.isValid())
+    {
+        return 0;
+    }
+
+    return m_pageCount;
+}
+
+int PDFThumbnailsItemModel::columnCount(const QModelIndex& parent) const
+{
+    Q_UNUSED(parent);
+    return 1;
+}
+
+QVariant PDFThumbnailsItemModel::data(const QModelIndex& index, int role) const
+{
+    if (!index.isValid() || !m_document)
+    {
+        return QVariant();
+    }
+
+    const int page = index.row();
+    switch (role)
+    {
+        case Qt::DisplayRole:
+            return QString::number(page + 1);
+
+        case Qt::DecorationRole:
+        {
+            QString key = getKey(index.row());
+
+            QPixmap pixmap;
+            if (!m_thumbnailCache.find(key, pixmap))
+            {
+                QImage thumbnail = m_proxy->drawThumbnailImage(index.row(), m_thumbnailSize);
+                if (!thumbnail.isNull())
+                {
+                    pixmap = QPixmap::fromImage(qMove(thumbnail));
+                    m_thumbnailCache.insert(key, pixmap);
+                }
+            }
+
+            return pixmap;
+        }
+
+        case Qt::TextAlignmentRole:
+        {
+            return int(Qt::AlignHCenter | Qt::AlignBottom);
+        }
+
+        case Qt::SizeHintRole:
+        {
+            const PDFPage* page = m_document->getCatalog()->getPage(index.row());
+            QSizeF pageSize = page->getRotatedMediaBox().size();
+            pageSize.scale(m_thumbnailSize, m_thumbnailSize, Qt::KeepAspectRatio);
+            return pageSize.toSize() + QSize(m_extraItemWidthHint, m_extraItemHeighHint);
+            break;
+        }
+
+        default:
+            break;
+    }
+
+    return QVariant();
+}
+
+void PDFThumbnailsItemModel::setThumbnailsSize(int size)
+{
+    if (m_thumbnailSize != size)
+    {
+        emit layoutAboutToBeChanged();
+        m_thumbnailSize = size;
+        m_thumbnailCache.clear();
+        emit layoutChanged();
+    }
+}
+
+void PDFThumbnailsItemModel::setDocument(const PDFDocument* document)
+{
+    if (m_document != document)
+    {
+        m_thumbnailCache.clear();
+        m_document = document;
+
+        m_pageCount = 0;
+        if (m_document)
+        {
+            m_pageCount = static_cast<int>(m_document->getCatalog()->getPageCount());
+        }
+    }
+}
+
+void PDFThumbnailsItemModel::onPageImageChanged(bool all, const std::vector<PDFInteger>& pages)
+{
+    Q_UNUSED(all);
+    Q_UNUSED(pages);
+
+    if (all)
+    {
+        m_thumbnailCache.clear();
+        emit dataChanged(index(0, 0, QModelIndex()), index(rowCount(QModelIndex()) - 1, 0, QModelIndex()));
+    }
+    else
+    {
+        const int rowCount = this->rowCount(QModelIndex());
+        for (const PDFInteger pageIndex : pages)
+        {
+            if (pageIndex < rowCount)
+            {
+                m_thumbnailCache.remove(getKey(pageIndex));
+                emit dataChanged(index(pageIndex, 0, QModelIndex()), index(pageIndex, 0, QModelIndex()));
+            }
+        }
+    }
+}
+
+QString PDFThumbnailsItemModel::getKey(int pageIndex) const
+{
+    return QString("PDF_THUMBNAIL_%1").arg(pageIndex);
+}
+
 }   // namespace pdf

PdfForQtLib/sources/pdfitemmodels.h

@@ -22,6 +22,7 @@
 #include "pdfobject.h"
 
 #include <QIcon>
+#include <QPixmapCache>
 #include <QAbstractItemModel>
 
 namespace pdf
@@ -31,6 +32,7 @@ class PDFDocument;
 class PDFOutlineItem;
 class PDFFileSpecification;
 class PDFOptionalContentActivity;
+class PDFDrawWidgetProxy;
 
 /// Represents tree item in the GUI tree
 class PDFTreeItem
@@ -217,6 +219,42 @@ public:
     const PDFFileSpecification* getFileSpecification(const QModelIndex& index) const;
 };
 
+class PDFFORQTLIBSHARED_EXPORT PDFThumbnailsItemModel : public QAbstractItemModel
+{
+    Q_OBJECT
+
+public:
+    explicit inline PDFThumbnailsItemModel(const PDFDrawWidgetProxy* proxy, QObject* parent);
+
+    bool isEmpty() const;
+
+    virtual QModelIndex index(int row, int column, const QModelIndex& parent) const override;
+    virtual QModelIndex parent(const QModelIndex& child) const override;
+    virtual int rowCount(const QModelIndex& parent) const override;
+    virtual int columnCount(const QModelIndex& parent) const override;
+    virtual QVariant data(const QModelIndex& index, int role) const override;
+
+    void setThumbnailsSize(int size);
+    void setDocument(const PDFDocument* document);
+
+    /// Sets the extra item width/height for size hint. This space will be added to the size hint (pixmap size)
+    void setExtraItemSizeHint(int width, int height) { m_extraItemWidthHint = width; m_extraItemHeighHint = height; }
+
+private:
+    void onPageImageChanged(bool all, const std::vector<PDFInteger>& pages);
+
+    /// Returns generated key for page index
+    QString getKey(int pageIndex) const;
+
+    const PDFDrawWidgetProxy* m_proxy;
+    int m_thumbnailSize;
+    int m_extraItemWidthHint;
+    int m_extraItemHeighHint;
+    int m_pageCount;
+    const PDFDocument* m_document;
+    QPixmapCache m_thumbnailCache;
+};
+
 }   // namespace pdf
 
 #endif // PDFITEMMODELS_H

PdfForQtViewer/PdfForQtViewer.pro

@@ -38,14 +38,16 @@ SOURCES += \
         pdfsidebarwidget.cpp \
         pdfviewermainwindow.cpp \
         pdfviewersettings.cpp \
-        pdfviewersettingsdialog.cpp
+        pdfviewersettingsdialog.cpp \
+        pdfwidgetutils.cpp
 
 HEADERS += \
         pdfaboutdialog.h \
         pdfsidebarwidget.h \
         pdfviewermainwindow.h \
         pdfviewersettings.h \
-        pdfviewersettingsdialog.h
+        pdfviewersettingsdialog.h \
+        pdfwidgetutils.h
 
 FORMS += \
         pdfaboutdialog.ui \

PdfForQtViewer/pdfforqtviewer.qrc

@@ -21,5 +21,6 @@
         <file>resources/zoom-fit.svg</file>
         <file>resources/zoom-fit-horizontal.svg</file>
         <file>resources/zoom-fit-vertical.svg</file>
+        <file>resources/synchronize.svg</file>
     </qresource>
 </RCC>

PdfForQtViewer/pdfsidebarwidget.cpp

@@ -18,6 +18,8 @@
 #include "pdfsidebarwidget.h"
 #include "ui_pdfsidebarwidget.h"
 
+#include "pdfwidgetutils.h"
+
 #include "pdfdocument.h"
 #include "pdfitemmodels.h"
 #include "pdfexception.h"
@@ -36,12 +38,14 @@ constexpr const char* STYLESHEET =
         "QPushButton { background-color: #404040; color: #FFFFFF; }"
         "QPushButton:disabled { background-color: #404040; color: #000000; }"
         "QPushButton:checked { background-color: #808080; color: #FFFFFF; }"
+        "QWidget#thumbnailsToolbarWidget { background-color: #F0F0F0 }"
         "QWidget#PDFSidebarWidget { background-color: #404040; background: green;}";
 
-PDFSidebarWidget::PDFSidebarWidget(QWidget* parent) :
+PDFSidebarWidget::PDFSidebarWidget(const pdf::PDFDrawWidgetProxy* proxy, QWidget* parent) :
     QWidget(parent),
     ui(new Ui::PDFSidebarWidget),
     m_outlineTreeModel(nullptr),
+    m_thumbnailsModel(nullptr),
     m_optionalContentTreeModel(nullptr),
     m_document(nullptr),
     m_optionalContentActivity(nullptr),
@@ -58,6 +62,15 @@ PDFSidebarWidget::PDFSidebarWidget(QWidget* parent) :
     ui->bookmarksTreeView->header()->hide();
     connect(ui->bookmarksTreeView, &QTreeView::clicked, this, &PDFSidebarWidget::onOutlineItemClicked);
 
+    // Thumbnails
+    m_thumbnailsModel = new pdf::PDFThumbnailsItemModel(proxy, this);
+    int thumbnailsMargin = ui->thumbnailsListView->style()->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr, ui->thumbnailsListView) + 1;
+    int thumbnailsFontSize = QFontMetrics(ui->thumbnailsListView->font()).lineSpacing();
+    m_thumbnailsModel->setExtraItemSizeHint(2 * thumbnailsMargin, thumbnailsMargin + thumbnailsFontSize);
+    ui->thumbnailsListView->setModel(m_thumbnailsModel);
+    connect(ui->thumbnailsSizeSlider, &QSlider::valueChanged, this, &PDFSidebarWidget::onThumbnailsSizeChanged);
+    onThumbnailsSizeChanged(ui->thumbnailsSizeSlider->value());
+
     // Optional content
     ui->optionalContentTreeView->header()->hide();
     m_optionalContentTreeModel = new pdf::PDFOptionalContentTreeItemModel(this);
@@ -78,6 +91,14 @@ PDFSidebarWidget::PDFSidebarWidget(QWidget* parent) :
     m_pageInfo[Thumbnails] = { ui->thumbnailsButton, ui->thumbnailsPage };
     m_pageInfo[Attachments] = { ui->attachmentsButton, ui->attachmentsPage };
 
+    for (const auto& pageInfo : m_pageInfo)
+    {
+        if (pageInfo.second.button)
+        {
+            connect(pageInfo.second.button, &QPushButton::clicked, this, &PDFSidebarWidget::onPageButtonClicked);
+        }
+    }
+
     selectPage(Invalid);
     updateButtons();
 }
@@ -95,6 +116,9 @@ void PDFSidebarWidget::setDocument(const pdf::PDFDocument* document, pdf::PDFOpt
     // Update outline
     m_outlineTreeModel->setDocument(document);
 
+    // Thumbnails
+    m_thumbnailsModel->setDocument(document);
+
     // Update optional content
     m_optionalContentTreeModel->setDocument(document);
     m_optionalContentTreeModel->setActivity(m_optionalContentActivity);
@@ -127,6 +151,30 @@ void PDFSidebarWidget::setDocument(const pdf::PDFDocument* document, pdf::PDFOpt
                 preferred = Attachments;
                 break;
 
+            case pdf::PageMode::Fullscreen:
+            {
+                pdf::PDFViewerPreferences::NonFullScreenPageMode nonFullscreenPageMode = m_document->getCatalog()->getViewerPreferences()->getNonFullScreenPageMode();
+                switch (nonFullscreenPageMode)
+                {
+                    case pdf::PDFViewerPreferences::NonFullScreenPageMode::UseOutline:
+                        preferred = Bookmarks;
+                        break;
+
+                    case pdf::PDFViewerPreferences::NonFullScreenPageMode::UseThumbnails:
+                        preferred = Thumbnails;
+                        break;
+
+                    case pdf::PDFViewerPreferences::NonFullScreenPageMode::UseOptionalContent:
+                        preferred = OptionalContent;
+                        break;
+
+                    default:
+                        break;
+                }
+
+                break;
+            }
+
             default:
                 break;
         }
@@ -161,7 +209,7 @@ bool PDFSidebarWidget::isEmpty(Page page) const
             return m_outlineTreeModel->isEmpty();
 
         case Thumbnails:
-            return true;
+            return m_thumbnailsModel->isEmpty();
 
         case OptionalContent:
             return m_optionalContentTreeModel->isEmpty();
@@ -242,6 +290,21 @@ void PDFSidebarWidget::updateButtons()
     }
 }
 
+void PDFSidebarWidget::onPageButtonClicked()
+{
+    QObject* pushButton = sender();
+
+    for (const auto& pageInfo : m_pageInfo)
+    {
+        if (pageInfo.second.button == pushButton)
+        {
+            Q_ASSERT(!isEmpty(pageInfo.first));
+            selectPage(pageInfo.first);
+            break;
+        }
+    }
+}
+
 void PDFSidebarWidget::onOutlineItemClicked(const QModelIndex& index)
 {
     if (const pdf::PDFAction* action = m_outlineTreeModel->getAction(index))
@@ -250,6 +313,13 @@ void PDFSidebarWidget::onOutlineItemClicked(const QModelIndex& index)
     }
 }
 
+void PDFSidebarWidget::onThumbnailsSizeChanged(int size)
+{
+    const int thumbnailsSize = PDFWidgetUtils::getPixelSize(this, size * 10.0);
+    Q_ASSERT(thumbnailsSize > 0);
+    m_thumbnailsModel->setThumbnailsSize(thumbnailsSize);
+}
+
 void PDFSidebarWidget::onAttachmentCustomContextMenuRequested(const QPoint& pos)
 {
     if (const pdf::PDFFileSpecification* fileSpecification = m_attachmentsTreeModel->getFileSpecification(ui->attachmentsTreeView->indexAt(pos)))

PdfForQtViewer/pdfsidebarwidget.h

@@ -33,7 +33,9 @@ namespace pdf
 {
 class PDFAction;
 class PDFDocument;
+class PDFDrawWidgetProxy;
 class PDFOutlineTreeItemModel;
+class PDFThumbnailsItemModel;
 class PDFAttachmentsTreeItemModel;
 class PDFOptionalContentActivity;
 class PDFOptionalContentTreeItemModel;
@@ -47,7 +49,7 @@ class PDFSidebarWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit PDFSidebarWidget(QWidget* parent = nullptr);
+    explicit PDFSidebarWidget(const pdf::PDFDrawWidgetProxy* proxy, QWidget* parent = nullptr);
     virtual ~PDFSidebarWidget() override;
 
     virtual void paintEvent(QPaintEvent* event) override;
@@ -84,7 +86,9 @@ private:
     void updateGUI(Page preferredPage);
     void updateButtons();
 
+    void onPageButtonClicked();
     void onOutlineItemClicked(const QModelIndex& index);
+    void onThumbnailsSizeChanged(int size);
     void onAttachmentCustomContextMenuRequested(const QPoint& pos);
 
     struct PageInfo
@@ -95,6 +99,7 @@ private:
 
     Ui::PDFSidebarWidget* ui;
     pdf::PDFOutlineTreeItemModel* m_outlineTreeModel;
+    pdf::PDFThumbnailsItemModel* m_thumbnailsModel;
     pdf::PDFOptionalContentTreeItemModel* m_optionalContentTreeModel;
     const pdf::PDFDocument* m_document;
     pdf::PDFOptionalContentActivity* m_optionalContentActivity;

PdfForQtViewer/pdfsidebarwidget.ui

@@ -98,7 +98,7 @@
    <item>
     <widget class="QStackedWidget" name="stackedWidget">
      <property name="currentIndex">
-      <number>1</number>
+      <number>2</number>
      </property>
      <widget class="QWidget" name="emptyPage"/>
      <widget class="QWidget" name="bookmarksPage">
@@ -125,6 +125,9 @@
      </widget>
      <widget class="QWidget" name="thumbnailsPage">
       <layout class="QVBoxLayout" name="thumbnailsLayout">
+       <property name="spacing">
+        <number>0</number>
+       </property>
        <property name="leftMargin">
         <number>0</number>
        </property>
@@ -137,6 +140,45 @@
        <property name="bottomMargin">
         <number>0</number>
        </property>
+       <item>
+        <widget class="QWidget" name="thumbnailsToolbarWidget" native="true">
+         <layout class="QHBoxLayout" name="thumbnailsToolbarLayout">
+          <item>
+           <widget class="QToolButton" name="synchronizeThumbnailsButton">
+            <property name="toolTip">
+             <string>Synchronize thumbnails with current page</string>
+            </property>
+            <property name="icon">
+             <iconset resource="pdfforqtviewer.qrc">
+              <normaloff>:/resources/synchronize.svg</normaloff>:/resources/synchronize.svg</iconset>
+            </property>
+            <property name="checkable">
+             <bool>true</bool>
+            </property>
+            <property name="checked">
+             <bool>true</bool>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSlider" name="thumbnailsSizeSlider">
+            <property name="minimum">
+             <number>1</number>
+            </property>
+            <property name="maximum">
+             <number>6</number>
+            </property>
+            <property name="value">
+             <number>3</number>
+            </property>
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
+       </item>
        <item>
         <widget class="QListView" name="thumbnailsListView">
          <property name="movement">
@@ -148,6 +190,9 @@
          <property name="viewMode">
           <enum>QListView::IconMode</enum>
          </property>
+         <property name="itemAlignment">
+          <set>Qt::AlignBottom|Qt::AlignHCenter</set>
+         </property>
         </widget>
        </item>
       </layout>
@@ -197,6 +242,8 @@
    </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="pdfforqtviewer.qrc"/>
+ </resources>
  <connections/>
 </ui>

PdfForQtViewer/pdfviewermainwindow.cpp

@@ -152,7 +152,7 @@ PDFViewerMainWindow::PDFViewerMainWindow(QWidget *parent) :
     setCentralWidget(m_pdfWidget);
     setFocusProxy(m_pdfWidget);
 
-    m_sidebarWidget = new PDFSidebarWidget(this);
+    m_sidebarWidget = new PDFSidebarWidget(m_pdfWidget->getDrawWidgetProxy(), this);
     m_sidebarDockWidget = new QDockWidget(tr("Sidebar"), this);
     m_sidebarDockWidget->setObjectName("SidebarDockWidget");
     m_sidebarDockWidget->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);

PdfForQtViewer/pdfviewersettings.cpp

@@ -1,3 +1,20 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
 #include "pdfviewersettings.h"
 
 namespace pdfviewer

PdfForQtViewer/pdfviewersettings.h

@@ -1,3 +1,20 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
 #ifndef PDFVIEWERSETTINGS_H
 #define PDFVIEWERSETTINGS_H
 

PdfForQtViewer/pdfviewersettingsdialog.cpp

@@ -1,3 +1,20 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
 #include "pdfviewersettingsdialog.h"
 #include "ui_pdfviewersettingsdialog.h"
 

PdfForQtViewer/pdfviewersettingsdialog.h

@@ -1,3 +1,20 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
 #ifndef PDFVIEWERSETTINGSDIALOG_H
 #define PDFVIEWERSETTINGSDIALOG_H
 

PdfForQtViewer/pdfwidgetutils.cpp

@@ -0,0 +1,39 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdfwidgetutils.h"
+
+
+namespace pdfviewer
+{
+
+int PDFWidgetUtils::getPixelSize(QWidget* widget, pdf::PDFReal sizeMM)
+{
+    const int width = widget->width();
+    const int height = widget->height();
+
+    if (width > height)
+    {
+        return pdf::PDFReal(width) * sizeMM / pdf::PDFReal(widget->widthMM());
+    }
+    else
+    {
+        return pdf::PDFReal(height) * sizeMM / pdf::PDFReal(widget->heightMM());
+    }
+}
+
+} // namespace pdfviewer

PdfForQtViewer/pdfwidgetutils.h

@@ -0,0 +1,39 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef PDFWIDGETUTILS_H
+#define PDFWIDGETUTILS_H
+
+#include "pdfglobal.h"
+
+#include <QWidget>
+
+namespace pdfviewer
+{
+
+class PDFWidgetUtils
+{
+public:
+    PDFWidgetUtils() = delete;
+
+    /// Converts size in MM to pixel size
+    static int getPixelSize(QWidget* widget, pdf::PDFReal sizeMM);
+};
+
+} // namespace pdfviewer
+
+#endif // PDFWIDGETUTILS_H

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