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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "abstractviewer.h"
#include <QAction>
#include <QTabWidget>
#include <QToolBar>
#include <QMenu>
#include <QMenuBar>
#include <QScrollArea>
#include <QStatusBar>
#include <QMessageBox>
#include <QSettings>
#include <QApplication>
#if defined(QT_ABSTRACTVIEWER_PRINTSUPPORT)
#include <QPrintDialog>
#endif // QT_ABSTRACTVIEWER_PRINTSUPPORT
AbstractViewer::AbstractViewer(QFile *file, QWidget *widget, QMainWindow *mainWindow) :
m_file(file),
m_widget(widget)
{
Q_ASSERT(widget);
Q_ASSERT(mainWindow);
m_uiAssets.mainWindow = mainWindow;
}
AbstractViewer::~AbstractViewer()
{
// delete all objects created by the viewer which need to be displayed
// and therefore parented on MainWindow
delete m_widget;
qDeleteAll(m_menus);
qDeleteAll(m_toolBars);
}
void AbstractViewer::statusMessage(const QString &message, const QString &type, int timeout)
{
const QString msg = viewerName() + (type.isEmpty() ? ": " : "/" + type + ": ") + message;
emit showMessage(msg, timeout);
}
QToolBar *AbstractViewer::addToolBar(const QString &title)
{
auto *bar = mainWindow()->addToolBar(title);
bar->setObjectName(QString(title).replace(" ", ""));
m_toolBars.append(bar);
return bar;
}
QMenu *AbstractViewer::addMenu(const QString &title)
{
QMenu *menu = new QMenu(title, menuBar());
menuBar()->insertMenu(m_uiAssets.help, menu);
m_menus.append(menu);
return menu;
}
QMenu *AbstractViewer::fileMenu()
{
static constexpr QLatin1StringView name = QLatin1StringView("qtFileMenu");
static QMenu *fileMenu = nullptr;
if (fileMenu)
return fileMenu;
QList<QMenu *> menus = mainWindow()->findChildren<QMenu *>();
for (auto *menu : menus) {
if (menu->objectName() == name) {
fileMenu = menu;
return fileMenu;
}
}
fileMenu = addMenu(tr("&File"));
fileMenu->setObjectName(name);
return fileMenu;
}
void AbstractViewer::print()
{
#ifdef QT_ABSTRACTVIEWER_PRINTSUPPORT
static const QString type = tr("Printing");
if (!hasContent()) {
statusMessage(tr("No content to print."), type);
return;
}
QPrinter printer(QPrinter::HighResolution);
QPrintDialog dlg(&printer, mainWindow());
dlg.setWindowTitle(tr("Print Document"));
if (dlg.exec() == QDialog::Accepted) {
printDocument(&printer);
} else {
statusMessage(tr("Printing canceled!"), type);
return;
}
const QPrinter::PrinterState state = printer.printerState();
QString message = viewerName() + " :";
switch (state) {
case QPrinter::PrinterState::Aborted:
message += tr("Printing aborted.");
break;
case QPrinter::PrinterState::Active:
message += tr("Printing active.");
break;
case QPrinter::PrinterState::Idle:
message += tr("Printing completed.");
break;
case QPrinter::PrinterState::Error:
message += tr("Printing error.");
break;
}
statusMessage(message, type);
#else
statusMessage(tr("Printing not supported!"));
#endif
}
/*!
\brief AbstractViewer::setPrintingEnabled
Enables / disables printing.
If printing is not supported or the viewer has no content to display,
\param enabled is overridden with \c false;
The signal printingEnabledChanged is emitted if the status has changed.
*/
void AbstractViewer::maybeSetPrintingEnabled(bool enabled)
{
#ifndef QT_ABSTRACTVIEWER_PRINTSUPPORT
enabled = false;
#else
if (!hasContent())
enabled = false;
#endif
if (enabled == m_printingEnabled)
return;
m_printingEnabled = enabled;
emit printingEnabledChanged(enabled);
}
void AbstractViewer::initViewer(QAction *back, QAction *forward, QAction *help, QTabWidget *tabs)
{
// Viewers need back & forward buttons and a tab widget.
Q_ASSERT(back);
Q_ASSERT(forward);
Q_ASSERT(tabs);
Q_ASSERT(help);
m_uiAssets.back = back;
m_uiAssets.forward = forward;
m_uiAssets.help = help;
m_uiAssets.tabs = tabs;
// Tabs can be populated individually by the viewer, if it supports overview
tabs->clear();
tabs->setVisible(supportsOverview());
emit uiInitialized();
}
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