qt-migration-legatus/qt5-before/dlbo/Lts/Common/LtsWidgets/lts_message_dialog.cpp

#include "lts_message_dialog.h"
#include "lts_message_dialog_helper.h"

#include <QCoreApplication>
#include <QVBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QDebug>


namespace LtsWidgets
{
namespace LtsMessageDialog
{
Button showMessage(QWidget* parent,
                   const QString& message,
                   const QString &title,
                   const Behaviour behaviour,
                   const Buttons buttons,
                   const QHash<Button, QString> &buttonTexts)
{
  static QAtomicInt s_used = 0;

  if (s_used)
    qDebug() << "LtsMessageDialog: showMessage called while showMessage is in its Event Loop - do not open more than one Dialog at once !!";

  s_used = 1;

  LtsMessageDialogHelper *dialog = new LtsMessageDialogHelper(); // NOT 'parent' !
  Button result = dialog->showMessage(parent, message, title, behaviour, buttons, buttonTexts);
  dialog->deleteLater();

  s_used = 0;

  return result;
}

Button askApplyDiscardCancel(QWidget *parent)
{
  const QString question = QCoreApplication::translate("LtsDialog",
                                                       "<br>"
                                                       "Apply - apply changes and close.<br>"
                                                       "Discard - discard changes and close.<br>"
                                                       "Cancel - do not close.");
  const QString title = QCoreApplication::translate("LtsDialog", "Unapplied changes made. Apply the changes?");
  return LtsMessageDialog::showMessage(parent,
                                       question,
                                       title,
                                       Behaviour::Modal,
                                       Button::Apply | Button::Discard | Button::Cancel);
}


} // namespace LtsMessageDialog



// LtsWidgets
LtsMessageDialogNew::LtsMessageDialogNew(QWidget *parent, const QString &message, const QString &title, const Behaviour behaviour, const Buttons buttons, const QHash<Button, QString> &buttonTexts, bool deleteOnClose)
{
  m_dialog = new LtsFramelessDialog(parent, behaviour);

  if (deleteOnClose)
    m_dialog->setAttribute(Qt::WA_DeleteOnClose); // Message Dialogs are loose instances that must delete theirselves, because noone keeps a pointer to the message dialog

  connect(m_dialog, &LtsFramelessDialog::destroyed,
          this, &LtsMessageDialogNew::deleteLater);

  QVBoxLayout *mainLayout = new QVBoxLayout(m_dialog);

  QString text;
  if (!title.isEmpty()) // title given?
  {
    text = QStringLiteral("<b>%1</b><br><br>").arg(title);
  }

  text += message;

  QLabel *messageLabel = new QLabel(text, m_dialog);
  messageLabel->setTextInteractionFlags(Qt::TextSelectableByMouse); // make text selectable by mouse
  mainLayout->addWidget(messageLabel);

  QHBoxLayout *buttonLayout = new QHBoxLayout;
  buttonLayout->setMargin(0);

  // TODO: FIXME: can this be called after the selection was made and the shadow just dies ?
  //connect(m_dialog, &LtsFramelessDialog::rejected, this, &LtsMessageDialogHelper::slotCancel); // respect that non-modal dialogs can be closed by clicking outside of it

  if (buttons.testFlag(Button::Ok))
    connect(addButton(buttonTexts.value(Button::Ok, tr("Ok")), buttonLayout, m_dialog, Button::Ok, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::ok);

  if (buttons.testFlag(Button::Yes))
    connect(addButton(buttonTexts.value(Button::Yes, tr("Yes")), buttonLayout, m_dialog, Button::Yes, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::yes);

  if (buttons.testFlag(Button::No))
    connect(addButton(buttonTexts.value(Button::No, tr("No")), buttonLayout, m_dialog, Button::No, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::no);

  if (buttons.testFlag(Button::Apply))
    connect(addButton(buttonTexts.value(Button::Apply, tr("Apply")), buttonLayout, m_dialog, Button::Apply, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::apply); // same as yes

  if (buttons.testFlag(Button::Discard))
    connect(addButton(buttonTexts.value(Button::Discard, tr("Discard")), buttonLayout, m_dialog, Button::Discard, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::discard); // same as no

  if (buttons.testFlag(Button::Cancel))
    connect(addButton(buttonTexts.value(Button::Cancel, tr("Cancel")), buttonLayout, m_dialog, Button::Cancel, parent), &QPushButton::clicked, this, &LtsMessageDialogNew::cancel);

  QWidget *buttonLayoutWidget = new QWidget;
  buttonLayoutWidget->setLayout(buttonLayout);

  mainLayout->addWidget(buttonLayoutWidget);

  m_dialog->show();
  m_dialog->raise();
}


QPushButton* LtsMessageDialogNew::addButton(const QString &text, QHBoxLayout *thatLayout, LtsFramelessDialog *dialog, const Button &button, QWidget *parent)
{
  QPushButton* btn = new QPushButton(text, parent);
  connect(btn, &QPushButton::clicked, dialog, &LtsFramelessDialog::accept);
  thatLayout->addWidget(btn);

  if (button == Button::Ok ||
      button == Button::Cancel) // ok and cancel should not be used together, so there is no check needed (as only one button can be the default button)
  {
    btn->setDefault(true);
  }

  return btn;
}


} // namespace LtsWidgets