[Add] PDF Preview widget.

[Add] Window icon.

bin/hpdf.pro

@@ -10,13 +10,16 @@ HEADERS += \
   ../src/pdf_factory.h \
   ../src/pdf_page_widget.h \
   ../src/pdf_table_widget.h \
-  ../src/pdf_file_widget.h
+  ../src/pdf_file_widget.h \
+  ../src/pdf_preview_widget.h
+
 SOURCES += \
   ../src/main.cpp \
   ../src/pdf_factory.cpp \
   ../src/pdf_page_widget.cpp \
   ../src/pdf_table_widget.cpp \
-  ../src/pdf_file_widget.cpp
+  ../src/pdf_file_widget.cpp \
+  ../src/pdf_preview_widget.cpp
 
 RESOURCES += hpdf.qrc
 

src/pdf_factory.cpp

@@ -2,6 +2,7 @@
 #include <QtGlobal>
 #include "pdf_factory.h"
 #include "pdf_table_widget.h"
+#include "pdf_preview_widget.h"
 #include "pdf_page_widget.h"
 
 PDFFactory::PDFFactory(void) {
@@ -34,10 +35,9 @@ void PDFFactory::createWidgets(void) {
   /* Create main area (table). */
   pdfTableView = new PDFTableWidget();
 
-  splitter = new QSplitter();
+  pdfPreview = new PDFPreviewWidget();
-  /* TODO: change pdfPreview widget. */
-  pdfPreview = new QWidget();
   pdfPreview->setMinimumWidth(100);
+  splitter = new QSplitter();
   splitter->setOrientation(Qt::Horizontal);
   splitter->addWidget(pdfTableView);
   splitter->addWidget(pdfPreview);
@@ -48,6 +48,9 @@ void PDFFactory::createWidgets(void) {
   splitter->setStretchFactor(1, 0.5);
   layout->addWidget(splitter);
 
+  connect(pdfTableView, SIGNAL(pageClicked(QMouseEvent*,QImage)), pdfPreview,
+          SLOT(pageClicked(QMouseEvent*,QImage)));
+
   setWindowIcon(QIcon(":/img/hpdf.png"));
   setWindowTitle(tr("HPDF"));
   setGeometry(0, 0, 1300, 650);

src/pdf_factory.h

@@ -1,6 +1,5 @@
 #pragma once
 #include <QMainWindow>
-#include "pdf_table_widget.h"
 
 class QAction;
 class QWidget;
@@ -8,6 +7,8 @@ class QTabWidget;
 class QScrollArea;
 class QSplitter;
 class QToolBar;
+class PDFTableWidget;
+class PDFPreviewWidget;
 
 class PDFFactory : public QMainWindow {
   Q_OBJECT
@@ -39,11 +40,10 @@ private:
 
   QWidget* centralWidget;
 
-  QTabWidget*     ribbon;
+  QTabWidget*       ribbon;
-  QScrollArea*    scrollArea;
+  QSplitter*        splitter;
-  PDFTableWidget* pdfTableView;
+  PDFTableWidget*   pdfTableView;
-  QSplitter*      splitter;
+  PDFPreviewWidget* pdfPreview;
-  QWidget*        pdfPreview;
 
   QToolBar* fileToolBar;
   QToolBar* editToolBar;

src/pdf_file_widget.cpp

@@ -10,7 +10,7 @@
 #define CHILD_AREA_WIDTH        150
 #define CHILD_AREA_HEIGHT       150
 
-FilesContainerWidget::FilesContainerWidget(QWidget* parent) {
+PagesContainerWidget::PagesContainerWidget(QWidget* parent) {
   setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
   setAcceptDrops(true);
   mainLayout = new QHBoxLayout();
@@ -18,26 +18,26 @@ FilesContainerWidget::FilesContainerWidget(QWidget* parent) {
   setLayout(mainLayout);
 }
 
-int FilesContainerWidget::getPagesCount() const {
+int PagesContainerWidget::getPagesCount() const {
   return pageWidgets.size();
 }
 
-QSize FilesContainerWidget::sizeHint() const {
+QSize PagesContainerWidget::sizeHint() const {
   return QSize(CHILD_AREA_WIDTH*getPagesCount(), CHILD_AREA_HEIGHT + 20);
 }
 
-void FilesContainerWidget::addPageWidget(PDFPageWidget* pageWidget) {
+void PagesContainerWidget::addPageWidget(PDFPageWidget* pageWidget) {
   pageWidgets.append(pageWidget);
   mainLayout->addWidget(pageWidget);
   adjustSize();
 }
 
-void FilesContainerWidget::dragEnterEvent(QDragEnterEvent* event) {
+void PagesContainerWidget::dragEnterEvent(QDragEnterEvent* event) {
   if(event->mimeData()->hasFormat("text/plain"))
     event->acceptProposedAction();
 }
 
-void FilesContainerWidget::dropEvent(QDropEvent* event) {
+void PagesContainerWidget::dropEvent(QDropEvent* event) {
   int from  = event->mimeData()->text().toInt();
   int to    = findPageWidgetInLayout(pageWidgets[findPageContainingClickEvent(event->pos())]);
 
@@ -47,7 +47,7 @@ void FilesContainerWidget::dropEvent(QDropEvent* event) {
   event->acceptProposedAction();
 }
 
-void FilesContainerWidget::mousePressEvent(QMouseEvent* event) {
+void PagesContainerWidget::mousePressEvent(QMouseEvent* event) {
   if(event->button() == Qt::LeftButton) {
     int draggedChild = (findPageContainingClickEvent(event->pos()));
 
@@ -62,7 +62,7 @@ void FilesContainerWidget::mousePressEvent(QMouseEvent* event) {
   }
 }
 
-int FilesContainerWidget::findPageContainingClickEvent(QPoint pos) {
+int PagesContainerWidget::findPageContainingClickEvent(QPoint pos) {
   for(int i = 0; i < getPagesCount(); i++)
     if(pageWidgets[i]->geometry().contains(pos))
       return i;
@@ -70,7 +70,7 @@ int FilesContainerWidget::findPageContainingClickEvent(QPoint pos) {
   return getPagesCount()-1;
 }
 
-int FilesContainerWidget::findPageWidgetInLayout(PDFPageWidget* pageWidget) {
+int PagesContainerWidget::findPageWidgetInLayout(PDFPageWidget* pageWidget) {
   for(int i = 0; i < getPagesCount(); i++)
     if(mainLayout->itemAt(i)->widget() == pageWidget)
       return i;
@@ -93,9 +93,9 @@ PDFFileWidget::PDFFileWidget(QWidget* parent) {
   fileNameLabel = new QLabel();
   topLayout->addWidget(fileNameLabel, 0, 1);
   
-  filesContainerWidget = new FilesContainerWidget();
+  pagesContainerWidget = new PagesContainerWidget();
   scrollArea = new QScrollArea();
-  scrollArea->setWidget(filesContainerWidget);
+  scrollArea->setWidget(pagesContainerWidget);
   topLayout->addWidget(scrollArea, 1, 0, 1, 5);
 
   setLayout(topLayout);
@@ -127,8 +127,10 @@ void PDFFileWidget::setDocument(Poppler::Document* document, QString fileName) {
 
     PDFPageWidget* pageWidget = new PDFPageWidget();
     pageWidget->setThumbnail(pageImage);
+    connect(pageWidget, SIGNAL(pageClicked(QMouseEvent*,QImage)), this,
+            SIGNAL(pageClicked(QMouseEvent*,QImage)));
 
-    filesContainerWidget->addPageWidget(pageWidget);
+    pagesContainerWidget->addPageWidget(pageWidget);
   }
   fileNameLabel->setText(fileName);
 }

src/pdf_file_widget.h

@@ -17,10 +17,10 @@ class QDropEvent;
 class QMouseEvent;
 class PDFPageWidget;
 
-class FilesContainerWidget : public QWidget {
+class PagesContainerWidget : public QWidget {
   Q_OBJECT
 public:
-  FilesContainerWidget(QWidget* parent = 0);
+  PagesContainerWidget(QWidget* parent = 0);
   QSize sizeHint() const;
 
   void addPageWidget(PDFPageWidget* image);
@@ -62,9 +62,12 @@ private:
 
   QLabel*                 fileNameLabel;
   QPushButton*            collapseButton;
-  FilesContainerWidget*   filesContainerWidget;
+  PagesContainerWidget*   pagesContainerWidget;
   QScrollArea*            scrollArea;
   QWidget*                ancestor;
   bool                    collapsed;
+
+signals:
+  void pageClicked(QMouseEvent*, QImage);
 };
 

src/pdf_page_widget.cpp

@@ -52,6 +52,10 @@ void PDFPageWidget::setThumbnail(QImage pageImage) {
   update();
 }
 
+void PDFPageWidget::mousePressEvent(QMouseEvent* event) {
+  emit pageClicked(event, image);
+}
+
 void PDFPageWidget::leaveEvent(QEvent* event) {
  btn1->hide();
  btn2->hide();

src/pdf_page_widget.h

@@ -7,6 +7,7 @@ class QImage;
 class QPixmap;
 class QPaintEvent;
 class QEvent;
+class QMouseEvent;
 class QSize;
 
 class PDFPageWidget : public QFrame {
@@ -22,6 +23,7 @@ protected:
   void paintEvent(QPaintEvent* event);
   void enterEvent(QEvent* event);
   void leaveEvent(QEvent* event);
+  void mousePressEvent(QMouseEvent* event);
 
 private:
   /*QVector<QPushButton> buttons;*/
@@ -29,5 +31,8 @@ private:
   QImage        image;
   QPixmap       pixmap;
   QPushButton*  btn1, *btn2;
+
+signals:
+  void pageClicked(QMouseEvent* event, QImage pageImage);
 };
 

src/pdf_preview_widget.cpp

@@ -0,0 +1,26 @@
+#include <QtWidgets>
+#include "pdf_preview_widget.h"
+
+PDFPreviewWidget::PDFPreviewWidget(QWidget* parent) : QWidget(parent) {
+  
+}
+
+void PDFPreviewWidget::setImage(QImage image) {
+  previewImage = image;
+  update();
+}
+
+void PDFPreviewWidget::pageClicked(QMouseEvent* mouseEvent, QImage image) {
+  setImage(image);
+}
+
+void PDFPreviewWidget::paintEvent(QPaintEvent* event) {
+  QPainter painter(this);
+
+  QPixmap pixmap = QPixmap::fromImage(previewImage);
+  pixmap = pixmap.scaled(size(), Qt::KeepAspectRatio);
+  painter.drawPixmap(QRect((size().width() - pixmap.width()) / 2,
+                    (size().height() - pixmap.height()) / 2,
+                    pixmap.width(), pixmap.height()), pixmap);
+}
+

src/pdf_preview_widget.h

@@ -0,0 +1,23 @@
+#pragma once
+#include <QWidget>
+
+class QImage;
+class QPaintEvent;
+class QMouseEvent;
+
+class PDFPreviewWidget : public QWidget {
+  Q_OBJECT
+public:
+  explicit PDFPreviewWidget(QWidget* parent = 0);
+  void setImage(QImage image);
+
+public slots:
+  void pageClicked(QMouseEvent* mouseEvent, QImage image);
+
+protected:
+  void paintEvent(QPaintEvent* event);
+
+private:
+  QImage previewImage;
+};
+

src/pdf_table_widget.cpp

@@ -39,6 +39,8 @@ void PDFTableWidget::loadFile(QString fileName) {
   PDFFileWidget* fileWidget = new PDFFileWidget();
   fileWidget->setAncestor(this);
   fileWidget->setDocument(doc, fileName);
+  connect(fileWidget, SIGNAL(pageClicked(QMouseEvent*,QImage)), this,
+          SIGNAL(pageClicked(QMouseEvent*,QImage)));
 
   fileWidgets.append(fileWidget);
 

src/pdf_table_widget.h

@@ -2,10 +2,11 @@
 #include <QFrame>
 #include <poppler-qt5.h>
 
+class QImage;
 class QVBoxLayout;
 class QString;
 class QScrollArea;
-
+class QMouseEvent;
 class PDFFileWidget;
 
 class PDFTableWidget : public QFrame {
@@ -26,5 +27,8 @@ private:
   QVector<Poppler::Document*> files;
   QVector<QString>            fileNames;
   QVector<PDFFileWidget*>     fileWidgets;
+
+signals:
+  void pageClicked(QMouseEvent*, QImage);
 };