remember paper size and orientation on PDF export dialog during session

app/exportpdfdialog.cpp

@@ -21,7 +21,7 @@
 #include <QFileInfo>
 #include <QPrinter>
 
-ExportPdfDialog::ExportPdfDialog(const QString &fileName, QWidget *parent) :
+ExportPdfDialog::ExportPdfDialog(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::ExportPdfDialog)
 {
@@ -31,12 +31,6 @@ ExportPdfDialog::ExportPdfDialog(const QString &fileName, QWidget *parent) :
     QPushButton *okButton = ui->buttonBox->button(QDialogButtonBox::Ok);
     okButton->setText("Export PDF");
 
-    if (!fileName.isEmpty()) {
-        QFileInfo info(fileName);
-        QString exportFileName = info.absoluteFilePath().replace(info.suffix(), "pdf");
-        ui->exportToLineEdit->setText(exportFileName);
-    }
-
     // fill paper size combobox
     ui->paperSizeComboBox->addItem(tr("A4 (210 x 297 mm, 8.26 x 11.69 inches)"), QPrinter::A4);
     ui->paperSizeComboBox->addItem(tr("Letter (8.5 x 11 inches, 215.9 x 279.4 mm)"), QPrinter::Letter);
@@ -46,9 +40,6 @@ ExportPdfDialog::ExportPdfDialog(const QString &fileName, QWidget *parent) :
     ui->paperSizeComboBox->addItem(tr("A6 (105 x 148 mm)"), QPrinter::A6);
     ui->paperSizeComboBox->addItem(tr("B4 (250 x 353 mm)"), QPrinter::B4);
     ui->paperSizeComboBox->addItem(tr("B5 (176 x 250 mm, 6.93 x 9.84 inches)"), QPrinter::B5);
-
-    // initialize Ok button state
-    exportToTextChanged(fileName);
 }
 
 ExportPdfDialog::~ExportPdfDialog()
@@ -79,6 +70,18 @@ QPrinter *ExportPdfDialog::printer()
     return p;
 }
 
+void ExportPdfDialog::setFileName(const QString &fileName)
+{
+    if (!fileName.isEmpty()) {
+        QFileInfo info(fileName);
+        QString exportFileName = info.absoluteFilePath().replace(info.suffix(), "pdf");
+        ui->exportToLineEdit->setText(exportFileName);
+    }
+
+    // initialize Ok button state
+    exportToTextChanged(fileName);
+}
+
 void ExportPdfDialog::exportToTextChanged(const QString &text)
 {
     // only enable ok button if a filename was provided

app/exportpdfdialog.h

@@ -29,11 +29,13 @@ class ExportPdfDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit ExportPdfDialog(const QString &fileName, QWidget *parent = 0);
+    explicit ExportPdfDialog(QWidget *parent = 0);
     ~ExportPdfDialog();
 
     QPrinter *printer();
 
+    void setFileName(const QString &fileName);
+
 private slots:
     void exportToTextChanged(const QString &text);
     void chooseFileButtonClicked();

app/mainwindow.cpp

@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2013-2015 Christian Loose <[email protected]>
  *
  * This program is free software: you can redistribute it and/or modify
@@ -84,7 +84,8 @@ MainWindow::MainWindow(const QString &fileName, QWidget *parent) :
     htmlPreviewController(0),
     themeCollection(new ThemeCollection()),
     splitFactor(0.5),
-    rightViewCollapsed(false)
+    rightViewCollapsed(false),
+    exportPdfDialog(0)
 {
     ui->setupUi(this);
     setupUi();
@@ -312,17 +313,20 @@ void MainWindow::fileExportToHtml()
 
 void MainWindow::fileExportToPdf()
 {
-    // using temporary QTextDocument instance to get links exported\printed correctly,
-    // as links will dissappear when printing directly from QWebView in current Qt implementation
-    // of QWebView::print() method (possible bug in Qt?)
-    // more info here: http://stackoverflow.com/questions/11629093/add-working-url-into-pdf-using-qt-qprinter
+	// using temporary QTextDocument instance to get links exported\printed correctly,
+	// as links will dissappear when printing directly from QWebView in current Qt implementation
+	// of QWebView::print() method (possible bug in Qt?)
+	// more info here: http://stackoverflow.com/questions/11629093/add-working-url-into-pdf-using-qt-qprinter
 
-    ExportPdfDialog dialog(fileName);
-    if (dialog.exec() == QDialog::Accepted) {
-         QTextDocument doc;
-         doc.setHtml(ui->webView->page()->currentFrame()->toHtml());
-         doc.print(dialog.printer());
-    }
+    if (!exportPdfDialog) // init, if not exists
+        exportPdfDialog = new ExportPdfDialog(this);
+
+    exportPdfDialog->setFileName(fileName);
+    if (exportPdfDialog->exec() == QDialog::Accepted) {
+		 QTextDocument doc;
+		 doc.setHtml(ui->webView->page()->currentFrame()->toHtml());
+        doc.print(exportPdfDialog->printer());
+	}
 }
 
 void MainWindow::filePrint()

app/mainwindow.h

@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2013-2014 Christian Loose <[email protected]>
  *
  * This program is free software: you can redistribute it and/or modify
@@ -40,6 +40,7 @@ class SlideLineMapping;
 class SnippetCollection;
 class ThemeCollection;
 class ViewSynchronizer;
+class ExportPdfDialog;
 class StatusBarWidget;
 
 
@@ -164,6 +165,8 @@ private slots:
     QString fileName;
     float splitFactor;
     bool rightViewCollapsed;
+
+    ExportPdfDialog *exportPdfDialog;
 };
 
 #endif // MAINWINDOW_H