Displaying a QR code in the EditItemDialog containing the full data of the current item as a string.

CMakeLists.txt

@@ -63,6 +63,8 @@ target_link_libraries(${TARGET_APP} PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
 
 target_include_directories(${TARGET_APP} PRIVATE ${CORE_LIB_DIR}/)
 target_link_libraries(${TARGET_APP} PRIVATE GenericCore)
+target_include_directories(${TARGET_APP} PRIVATE ${QR_LIB_DIR}/src)
+target_link_libraries(${TARGET_APP} PRIVATE qrcode)
 
 
 # Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.

dialogs/edititemdialog.cpp

@@ -1,13 +1,15 @@
 #include "edititemdialog.h"
 
 #include <QDialogButtonBox>
+#include <QLabel>
 #include <QVBoxLayout>
 
 #include "../views/itemdetailmapper.h"
 
 EditItemDialog::EditItemDialog(QTableView* tableView, QWidget* parent)
     : AbstractDialog(QDialogButtonBox::Close, parent)
-    , m_tableView(tableView) {}
+    , m_tableView(tableView)
+    , m_qrCodeDisplay(new QLabel("QR Code")) {}
 
 void EditItemDialog::createContent() {
   if (m_contentContainer) {
@@ -16,9 +18,17 @@ void EditItemDialog::createContent() {
 
   setWindowTitle(tr("Edit item..."));
 
+  m_contentContainer       = new QWidget(this);
+  QHBoxLayout* innerLayout = new QHBoxLayout(this);
+  m_contentContainer->setLayout(innerLayout);
+
   m_detailMapper = new ItemDetailMapper(this);
   m_detailMapper->setModelMappings(m_tableView);
-  m_contentContainer = m_detailMapper;
+  innerLayout->addWidget(m_detailMapper);
+
+  updateQRCode();
+  connect(m_detailMapper, &ItemDetailMapper::contentChanged, this, &EditItemDialog::updateQRCode);
+  innerLayout->addWidget(m_qrCodeDisplay);
 
   m_outerLayout->insertWidget(0, m_contentContainer);
 }
@@ -32,3 +42,16 @@ void EditItemDialog::reject() {
   m_detailMapper->revert();
   QDialog::reject();
 }
+
+void EditItemDialog::updateQRCode(const QString text) {
+  QImage unscaledImage;
+  if (text.isEmpty()) {
+    unscaledImage = QImage("://no-picture-taking.png");
+  } else {
+    unscaledImage = m_generator.generateQr(text);
+  }
+  QImage image = unscaledImage.scaled(250, 250);
+
+  m_qrCodeDisplay->setPixmap(QPixmap::fromImage(image));
+  m_qrCodeDisplay->setToolTip(text);
+}

dialogs/edititemdialog.h

@@ -1,6 +1,7 @@
 #ifndef EDITITEMDIALOG_H
 #define EDITITEMDIALOG_H
 
+#include "QrCodeGenerator.h"
 #include "abstractdialog.h"
 
 class QDoubleSpinBox;
@@ -23,6 +24,9 @@ class EditItemDialog : public AbstractDialog {
   void accept() override;
   void reject() override;
 
+ private slots:
+  void updateQRCode(const QString text = "");
+
  private:
   QTableView* m_tableView = nullptr;
   ItemDetailMapper* m_detailMapper;
@@ -41,6 +45,9 @@ class EditItemDialog : public AbstractDialog {
 
   QLabel* m_factorLabel       = nullptr;
   QDoubleSpinBox* m_factorBox = nullptr;
+
+  QLabel* m_qrCodeDisplay = nullptr;
+  QrCodeGenerator m_generator;
 };
 
 #endif  // EDITITEMDIALOG_H

views/itemdetailmapper.cpp

@@ -10,6 +10,7 @@
 #include <QPushButton>
 #include <QSpinBox>
 #include <QTableView>
+#include "model/metadata.h"
 
 ItemDetailMapper::ItemDetailMapper(QWidget* parent)
     : QWidget{parent} {
@@ -101,12 +102,13 @@ bool ItemDetailMapper::submit() { return m_mapper->submit(); }
 void ItemDetailMapper::revert() { m_mapper->revert(); }
 
 void ItemDetailMapper::onCurrentIndexChanged(const QModelIndex& current,
-                                             const QModelIndex& previous) {
+                                             const QModelIndex& /*previous*/) {
   if (!isEnabled()) {
     setEnabled(true);
   }
   m_mapper->setCurrentModelIndex(current);
   updateButtons(current.row());
+  emitContentChanged(current);
 }
 
 void ItemDetailMapper::rowsInserted(const QModelIndex& parent, int start, int end) {
@@ -147,3 +149,12 @@ void ItemDetailMapper::updateButtons(int row) {
   m_previousButton->setEnabled(row > 0);
   m_nextButton->setEnabled(row < m_model->rowCount() - 1);
 }
+
+void ItemDetailMapper::emitContentChanged(const QModelIndex& currentIndex) {
+  // BUG QR-Code isn't updated after changes through the ItemDetailMapper #18
+  QString toStringText = "";
+  if (currentIndex.isValid()) {
+    toStringText = currentIndex.data(ToStringRole).toString();
+  }
+  emit contentChanged(toStringText);
+}

views/itemdetailmapper.h

@@ -24,6 +24,7 @@ class ItemDetailMapper : public QWidget {
   void revert();
 
  signals:
+  void contentChanged(const QString text);
 
  private slots:
   void onCurrentIndexChanged(const QModelIndex& current, const QModelIndex& previous);
@@ -32,6 +33,7 @@ class ItemDetailMapper : public QWidget {
   void toPrevious();
   void toNext();
   void updateButtons(int row);
+  void emitContentChanged(const QModelIndex& currentIndex);
 
  private:
   /// *** members ***