Printing support #1525: shortcuts for the hex and text editors

Print shortcuts are added in the context of the text and hex editors of
the Edit Database Cell dock.

src/EditDialog.cpp

@@ -16,6 +16,8 @@
 #include <QJsonDocument>
 #include <QtXml/QDomDocument>
 #include <QMessageBox>
+#include <QPrinter>
+#include <QPrintPreviewDialog>
 
 EditDialog::EditDialog(QWidget* parent)
     : QDialog(parent),
@@ -48,6 +50,12 @@ EditDialog::EditDialog(QWidget* parent)
     connect(sciEdit, SIGNAL(textChanged()), this, SLOT(updateApplyButton()));
     connect(sciEdit, SIGNAL(textChanged()), this, SLOT(editTextChanged()));
 
+    // Create shortcuts for the widgets that doesn't have its own printing mechanism.
+    QShortcut* shortcutPrintHex = new QShortcut(QKeySequence::Print, hexEdit, nullptr, nullptr, Qt::WidgetShortcut);
+    connect(shortcutPrintHex, &QShortcut::activated, this, &EditDialog::openPrintDialog);
+    QShortcut* shortcutPrintText = new QShortcut(QKeySequence::Print, ui->editorText, nullptr, nullptr, Qt::WidgetShortcut);
+    connect(shortcutPrintText, &QShortcut::activated, this, &EditDialog::openPrintDialog);
+
     mustIndentAndCompact = Settings::getValue("databrowser", "indent_compact").toBool();
     ui->buttonIndent->setChecked(mustIndentAndCompact);
 
@@ -1022,3 +1030,33 @@ void EditDialog::setStackCurrentIndex(int editMode)
         break;
     }
 }
+
+void EditDialog::openPrintDialog()
+{
+    QPrinter printer;
+    QPrintPreviewDialog *dialog = new QPrintPreviewDialog(&printer);
+
+    QTextDocument *document = new QTextDocument();
+    switch (dataSource) {
+    case TextBuffer:
+        document->setPlainText(ui->editorText->toPlainText());
+        break;
+    case SciBuffer:
+        // This case isn't really expected because the Scintilla widget has it's own printing slot
+        document->setPlainText(sciEdit->text());
+        break;
+    case HexBuffer:
+        document->setPlainText(hexEdit->toReadableString());
+        document->setDefaultFont(hexEdit->font());
+        break;
+    }
+
+    connect(dialog, &QPrintPreviewDialog::paintRequested, [&](QPrinter *previewPrinter) {
+        document->print(previewPrinter);
+    });
+
+    dialog->exec();
+
+    delete dialog;
+    delete document;
+}

src/EditDialog.h

@@ -89,6 +89,7 @@ private slots:
     bool promptInvalidData(const QString& dataType, const QString& errorString);
     void setDataInBuffer(const QByteArray& data, DataSources source);
     void setStackCurrentIndex(int editMode);
+    void openPrintDialog();
 };
 
 #endif