File indexing completed on 2024-04-21 15:23:40

 /********************************************************************************
  * Copyright (C) 2011-2015 by Stephen Allewell                                  *
  * steve.allewell@gmail.com                                                     *
  *                                                                              *
  * This program is free software; you can redistribute it and/or modify         *
  * it under the terms of the GNU General Public License as published by         *
  * the Free Software Foundation; either version 2 of the License, or            *
  * (at your option) any later version.                                          *
  ********************************************************************************/
 
 
 /**
  * @file
  * Implement the MainWindow class. This supplies the main user interface which comprises of a tabbed widget
  * containing a symbol editor and a library of symbols loaded from a symbol file.  A standard menu bar, tool
  * bar and status bar are provided to access the various functions and provide any suitable feedback or status
  * messages.
  */
 
 
 /**
  * @page main_window Main Window
  * The symbol editor main window comprises a tabbed widget containing the symbol editor and a list of the
  * current symbols in the loaded file. A standard menu bar, tool bar and status bar are provided to access
  * the various tools and functions and provide any necessary status messages or user feedback.
  *
  * @image html ui-main-editor.png "The user interface showing the editor tab"
  *
  * @section file_menu File Menu
  *
  * @subsection file_new New
  * Start a new symbol definition. The editor is cleared ready to define the new symbol. If there is an existing
  * symbol being edited that has not been saved, the user is prompted to save it or allow it to be overwritten.
  * Alternatively the user can cancel the creation of the new symbol leaving the current one intact.
  *
  * @subsection file_open Open
  * Open an existing symbol library. The current symbol and symbol library are cleared and the user is prompted to
  * select a file to be opened. If the current symbol of symbol file have not been saved the user is asked to
  * save them or allow them to be overwritten. Alternatively the user can cancel opening a file leaving the current
  * ones intact.
  *
  * @subsection file_open_recent Open Recent
  * Previously opened files are added to the recent files menu and can be opened by selecting the file specified.
  * The same rules relating to Open and the current symbol and library apply here.
  *
  * @subsection file_save Save
  * Save the current library to a file. If this is a new library the user will be prompted to enter a file name.
  *
  * @subsection file_save_as Save As
  * Save the current library using a different name. The user will be prompted to enter a file name.
  *
  * @subsection file_save_symbol Save Symbol
  * Save the current symbol being edited to the current library. This does not save the symbol library to disk, this
  * is done by the Save command.
  *
  * @subsection file_save_symbol_as_new Save Symbol as New
  * Save the symbol as if it was a new one. This would apply if the symbol was one from the library being edited. The
  * editor maintains a link between it and the library and would normally update it when saved. This will reset the
  * index and add the symbol to the library as a new one. The symbol being edited is now detached from the library
  * and subsequent saves will continue to add new symbols to the library. This can be used to create new symbols based
  * on an existing library symbol.
  *
  * @subsection file_import_library Import Library
  * Import an existing symbol library and append the symbols in it to the current library.
  *
  * @subsection file_close Close
  * Close the current library. The editor and the library are cleared leaving an empty library ready for new symbols
  * to be added. If the current symbol and library need to be saved the user is prompted to do so.
  *
  * @subsection file_quit Quit
  * Quit the application. If the current symbol and library need to be saved the user is prompted to do so.
  *
  * @section edit_menu Edit Menu
  *
  * @subsection edit_undo Undo
  * Actions that modify the symbol currently being edited or the current symbol library can be undone reverting to
  * the previous state. The editor and the library have independent undo stacks and changes to one do not affect the
  * other. The undo command affects the currently selected tab. The undo command in the menu shows a description of
  * the action that will be undone. For the undo command on the toolbar, the tooltip will show the desciption.
  *
  * @subsection edit_redo Redo
  * Actions that are undone can be redone. As with undo, the editor and the symbol library are independent of each
  * other and the redo command affects the currently selected tab. The redo command in the menu and the toolbar tooltip
  * shows a description of the action that will be redone.
  *
  * @subsection file_edit_toolbar File and Edit Toolbar
  * The file and edit menu toolbar allow quick access to these common functions.
  * @image html ui-main-toolbar.png
  * - @ref file_new
  * - @ref file_open
  * - @ref file_save
  * - @ref edit_undo
  * - @ref edit_redo
  * - @ref file_save_symbol
  *
  * @section rendering_menu Rendering Menu
  * The defined path can be rendered with various settings. Filled or unfilled, for which the fill method can be defined.
  * The path end cap can be defined as flat, square and round. The line join type can be defined as bevel, miter and round.
  * The line width can be increased or decreased.
  *
  * For full details of the rendering options, see the @ref path_rendering.
  *
  * @subsection rendering_toolbar Rendering Toolbar
  * The rendering toolbar allows quick access to these common functions.
  * @image html ui-rendering-toolbar.png
  * - @ref fill_mode
  * - @ref fill_rule
  * - @ref line_cap
  * - @ref line_join
  * - @ref line_width
  *
  * @section tools_menu Tools Menu
  * A number of tools are available to aid the design of the symbols. The symbols are composed of a series of sub paths
  * and each sub path is composed of a move to the start position (this defaults to 0,0 for new symbols) followed by
  * lines and curves. The curves are cubic splines having a start, an end and two control points defining the curve.
  * There are convenience tools to create rectangles and ellipses, but these will be broken down into lines and curves.
  *
  * All points created for the elements are moveable by dragging them to their new position. All points can be snapped
  * to the grid intersections if the snap option is turned on, otherwise they can be positioned anywhere.
  *
  * The symbol can be rotated clockwise and counter clockwise and also flipped vertically and horizontally. This allows
  * multiple symbols to be easily created based on the same design. Remember to use the save symbol as new option for this.
  *
  * For full details of the tools see the @ref editor_tools.
  *
  * @subsection tools_toolbar Tools Toolbar
  * The tools toolbar allows quick access to these common functions.
  * @image html ui-tools-toolbar.png
  * - @ref move_to
  * - @ref line_to
  * - @ref cubic_to
  * - @ref rectangle
  * - @ref ellipse
  * - @ref character
  * - @ref rotate_left
  * - @ref rotate_right
  * - @ref flip_horizontal
  * - @ref flip_vertical
  * - @ref scale_preferred
  * - @ref snap_grid
  * - @ref guide_lines
  */
 
 
 #include "MainWindow.h"
 
 #include <QAction>
 #include <QFileDialog>
 #include <QIcon>
 #include <QVBoxLayout>
 #include <QListWidgetItem>
 #include <QMenu>
 #include <QStatusBar>
 #include <QTabWidget>
 #include <QTemporaryFile>
 
 #include <KActionCollection>
 #include <KConfigDialog>
 #include <KConfigGroup>
 #include <KIO/FileCopyJob>
 #include <KIO/StatJob>
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <KRecentFilesAction>
 
 #include "ConfigurationDialogs.h"
 #include "Editor.h"
 #include "Exceptions.h"
 #include "SymbolListWidget.h"
 #include "SymbolLibrary.h"
 
 #include "ui_EditorConfigPage.h"
 
 #include "SymbolEditor.h"
 
 
 /**
  * Construct the MainWindow.
  * Create an instance of a symbol file.
  * Create the tab widget, editor, list widget and the symbol file. The tab widget is then set as
  * the central widget and will contain the editor and list widgets. The Editor is added to a
  * layout to allow it to be centralized in the main window.
  * Set up the actions, add the two undo stacks to the undo group and connect any signal slots required.
  * Set up the GUI from the applications rc file.
  * The editor page is selected in the tab widget which should also initialise the undo redo buttons.
  * The moveTo tool action is triggered to enable the moveTo tool as the initial one.
  * Other actions are initialised from the current Editor symbol.
  */
 MainWindow::MainWindow()
     :   m_tabWidget(new QTabWidget(this)),
         m_editor(new Editor),
         m_listWidget(new SymbolListWidget(m_tabWidget)),
         m_symbolLibrary(new SymbolLibrary(m_listWidget)),
         m_item(0),
         m_menu(0)
 {
     m_listWidget->loadFromLibrary(m_symbolLibrary);
     m_url = QUrl(i18n("Untitled"));
 
     setObjectName("MainWindow#");
 
     KActionCollection *actions = actionCollection();
 
     m_listWidget->setIconSize(48);
     m_listWidget->setContextMenuPolicy(Qt::CustomContextMenu);
 
     m_tabWidget->addTab(m_editor, i18nc("The editor tab title", "Editor"));
     m_tabWidget->addTab(m_listWidget, i18nc("The library tab title", "Library"));
 
     setCentralWidget(m_tabWidget);
 
     setupActions();
 
     m_undoGroup.addStack(m_editor->undoStack());
     m_undoGroup.addStack(m_symbolLibrary->undoStack());
     connect(m_tabWidget, SIGNAL(currentChanged(int)), this, SLOT(currentChanged(int)));
     connect(m_editor, SIGNAL(message(QString)), statusBar(), SLOT(showMessage(QString)));
     connect(m_editor, SIGNAL(minLineWidth(bool)), actions->action("decreaseLineWidth"), SLOT(setDisabled(bool)));
     connect(m_editor, SIGNAL(maxLineWidth(bool)), actions->action("increaseLineWidth"), SLOT(setDisabled(bool)));
     connect(&m_undoGroup, SIGNAL(canUndoChanged(bool)), actions->action("edit_undo"), SLOT(setEnabled(bool)));
     connect(&m_undoGroup, SIGNAL(canRedoChanged(bool)), actions->action("edit_redo"), SLOT(setEnabled(bool)));
     connect(&m_undoGroup, SIGNAL(undoTextChanged(QString)), this, SLOT(undoTextChanged(QString)));
     connect(&m_undoGroup, SIGNAL(redoTextChanged(QString)), this, SLOT(redoTextChanged(QString)));
     connect(&m_undoGroup, SIGNAL(cleanChanged(bool)), this, SLOT(cleanChanged(bool)));
     connect(m_editor->undoStack(), SIGNAL(cleanChanged(bool)), actions->action("saveSymbol"), SLOT(setDisabled(bool)));
     connect(m_editor->undoStack(), SIGNAL(cleanChanged(bool)), actions->action("saveSymbolAsNew"), SLOT(setDisabled(bool)));
     connect(m_symbolLibrary->undoStack(), SIGNAL(cleanChanged(bool)), actions->action("file_save"), SLOT(setDisabled(bool)));
     connect(m_listWidget, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(itemSelected(QListWidgetItem*)));
     connect(m_listWidget, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(listWidgetContextMenuRequested(QPoint)));
 
     setupGUI(KXmlGuiWindow::Default, "SymbolEditorui.rc");
 
     actions->action("moveTo")->trigger();                   // select draw tool
     actions->action("enableSnap")->setChecked(true);        // enable snap
     actions->action("enableGuides")->setChecked(true);      // enable creation of guides
     actions->action("file_save")->setEnabled(false);        // nothing to save yet
     actions->action("saveSymbol")->setEnabled(false);       // nothing to save yet
     actions->action("saveSymbolAsNew")->setEnabled(false);  // nothing to save yet
     setActionsFromSymbol(m_editor->symbol().second);        // set the actions that depend on the current empty symbol, i.e. the defaults
 
     currentChanged(m_tabWidget->currentIndex());              // this should be the editor
 }
 
 
 /**
  * Descructor for the MainWindow
  * Delete the SymbolLibrary object. The other widgets that are created in the constructor are children of the
  * MainWindow and will be destroyed when this is.
  */
 MainWindow::~MainWindow()
 {
     delete m_symbolLibrary;
 }
 
 
 /**
  * Test if it is ok to close this window.
  * Check if the current symbol being edited has been changed and if the library has been changed.
  *
  * @return true if it is ok to close, false otherwise
  */
 bool MainWindow::queryClose()
 {
     return (editorClean() && libraryClean());
 }
 
 
 /**
  * Check if it ok to close the currently edited symbol.
  *
  * @return true if is ok to close the symbol, false otherwise
  */
 bool MainWindow::editorClean()
 {
     bool clean = m_editor->undoStack()->isClean();
 
     if (!clean) {
         int messageBoxResult = KMessageBox::warningYesNoCancel(this, i18n("Save changes to the symbol?\nSelecting No discards changes."));
 
         switch (messageBoxResult) {
         case KMessageBox::Yes:
             saveSymbol();
             save();
             clean = true;
             break;
 
         case KMessageBox::No:
             clean = true;
             break;
 
         case KMessageBox::Cancel:
             clean = false;
             break;
         }
     }
 
     return clean;
 }
 
 
 /**
  * Check if it is ok to close the library.
  *
  * @return true if it is ok to close the library, false otherwise
  */
 bool MainWindow::libraryClean()
 {
     bool clean = m_symbolLibrary->undoStack()->isClean();
 
     if (!clean) {
         int messageBoxResult = KMessageBox::warningYesNoCancel(this, i18n("Save changes to the library?\nSelecting No discards changes."));
 
         switch (messageBoxResult) {
         case KMessageBox::Yes:
             save();
             clean = true;
             break;
 
         case KMessageBox::No:
             clean = true;
             break;
 
         case KMessageBox::Cancel:
             clean = false;
             break;
         }
     }
 
     return clean;
 }
 
 
 /**
  * Test if it is ok to close the application.
  *
  * @return return true since queryClose has already been called
  */
 bool MainWindow::queryExit()
 {
     return true;
 }
 
 
 /**
  * Open a file.
  * Use the QFileDialog::getOpenFileUrl to get a QUrl to open which is then passed to filOpen(const QUrl &).
  */
 void MainWindow::fileOpen()
 {
     QUrl url = QFileDialog::getOpenFileUrl(this, i18n("Open file"), QUrl::fromLocalFile(QDir::homePath()), i18n("Cross Stitch Symbols (*.sym)"));
 
     if (!url.isEmpty()) {
         fileOpen(url);
     }
 }
 
 
 /**
  * If a valid url is supplied, try and download the file (in case it comes from a remote source) and
  * then try and open it read only. Once opened create a QDataStream and try and read the contents.
  * This is protected in a try-catch block to intercept any exceptions that may be thrown by the loading
  * routines. If there were any errors, the symbol library will be cleared and a suitable error message
  * will be displayed.
  * The url of the file is set in the symbol file object only if there were no errors. This will avoid
  * writing to a corrupt file or to a file that isn't a symbol file. The url is added to the recent file
  * list.
  */
 void MainWindow::fileOpen(const QUrl &url)
 {
     if (!editorClean() || !libraryClean()) {
         return;
     }
 
     m_symbolLibrary->clear();
     m_editor->clear();
 
     if (url.isValid()) {
         QTemporaryFile tmpFile;
 
         if (tmpFile.open()) {
             KIO::FileCopyJob *job = KIO::file_copy(url, QUrl::fromLocalFile(tmpFile.fileName()), -1, KIO::Overwrite);
 
             if (job->exec()) {
                 QDataStream stream(&tmpFile);
 
                 try {
                     stream >> *m_symbolLibrary;
                     m_url = url;
                     KRecentFilesAction *action = static_cast<KRecentFilesAction *>(actionCollection()->action("file_open_recent"));
                     action->addUrl(url);
                     action->saveEntries(KConfigGroup(KSharedConfig::openConfig(), "RecentFiles"));
                     m_tabWidget->setCurrentIndex(1);
                 } catch (const InvalidFile &e) {
                     KMessageBox::sorry(0, i18n("This doesn't appear to be a valid symbol file"));
                 } catch (const InvalidFileVersion &e) {
                     KMessageBox::sorry(0, i18n("Version %1 of the library file is not supported in this version of SymbolEditor", e.version));
                 } catch (const InvalidSymbolVersion &e) {
                     KMessageBox::sorry(0, i18n("Version %1 of the symbol is not supported in this version of SymbolEditor", e.version));
                 } catch (const FailedReadLibrary &e) {
                     KMessageBox::sorry(0, i18n("Failed to read the library\n%1", e.statusMessage()));
                     m_symbolLibrary->clear();
                 }
             } else {
                 KMessageBox::sorry(0, job->errorString());
             }
         } else {
             KMessageBox::sorry(0, tmpFile.errorString());
         }
     } else {
         KMessageBox::sorry(0, i18n("The url %1 is invalid", url.fileName()));
     }
 }
 
 
 /**
  * Save the library using its url, if this is Untitled than call saveAs to get a valid url.
  * Open the file and write to the stream. This is protected in a try-catch block to intercept
  * any exceptions thrown by the writing routines. If there were any exceptions thrown or the
  * file could not be opened a suitable error message is shown.
  */
 void MainWindow::save()
 {
     if (m_url == QUrl(i18n("Untitled"))) {
         saveAs();
     } else {
         QFile file(m_url.path());
 
         if (file.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
             QDataStream stream(&file);
             stream.setVersion(QDataStream::Qt_4_0);
 
             try {
                 stream << *m_symbolLibrary;
             } catch (const FailedWriteLibrary &e) {
                 KMessageBox::sorry(0, i18n("Failed to write the library\n%1", e.statusMessage()));
             }
 
             file.close();
             m_symbolLibrary->undoStack()->setClean();
         } else {
             KMessageBox::sorry(0, i18n("Failed to open the file %1\n%2", m_url.fileName(), file.errorString()));
         }
     }
 }
 
 
 /**
  * Save the library using a different url.
  * This is also called from save when the assigned url is Untitled.
  * The new url is added to the recent files list.
  */
 void MainWindow::saveAs()
 {
     QUrl url = QFileDialog::getSaveFileUrl(this, i18n("Save As..."), QUrl::fromLocalFile(QDir::homePath()), i18n("Cross Stitch Symbols (*.sym)"));
 
     if (url.isValid()) {
         KIO::StatJob *statJob = KIO::stat(url, KIO::StatJob::DestinationSide, 0);
 
         if (statJob->exec()) {
             if (KMessageBox::warningYesNo(this, i18n("This file already exists\nDo you want to overwrite it?")) == KMessageBox::No) {
                 return;
             }
         }
 
         m_url = url;
         save();
         KRecentFilesAction *action = static_cast<KRecentFilesAction *>(actionCollection()->action("file_open_recent"));
         action->addUrl(url);
         action->saveEntries(KConfigGroup(KSharedConfig::openConfig(), "RecentFiles"));
     }
 }
 
 
 /**
  * Initialise a new symbol.
  * Check if the current symbol has been saved or can be overwritten and then call clear
  * on the editor which initializes the editor with an empty symbol.
  * The actions are reset to those relevant to the new empty symbol.
  * The moveTo action is triggered as this is the most likely to be used next.
  */
 void MainWindow::newSymbol()
 {
     if (editorClean()) {
         m_editor->clear();
         setActionsFromSymbol(m_editor->symbol().second);
         actionCollection()->action("moveTo")->trigger();   // Select move tool
     }
 }
 
 
 /**
  * Save the current symbol.
  * Store the symbol currently in the editor into the symbol library object. If it is a
  * new symbol the index will be 0, a new index will then be created. Otherwise the index
  * will be the one from the library and storing it will overwrite the existing symbol.
  */
 void MainWindow::saveSymbol()
 {
     QPair<qint16, Symbol> pair = m_editor->symbol();
     m_symbolLibrary->undoStack()->push(new UpdateSymbolCommand(m_symbolLibrary, pair.first, pair.second));
     m_editor->undoStack()->setClean();
 }
 
 
 /**
  * Save the current symbol using a new index.
  * Store the symbol currently in the editor into the symbol library object.  Ignore the
  * editors index, resetting it to 0 and a new index will then be created.
  * Reassign this symbol back to the editor with a 0 index effectively creating a new symbol in
  * the editor.
  */
 void MainWindow::saveSymbolAsNew()
 {
     QPair<qint16, Symbol> pair = m_editor->symbol();
     pair.first = 0;
     m_symbolLibrary->undoStack()->push(new UpdateSymbolCommand(m_symbolLibrary, pair.first, pair.second));
     m_editor->setSymbol(pair);
 }
 
 
 /**
  * Import a library of symbols into the current library.
  * Get a url for the library file and try and download it in case it comes from a remote source.
  * Open the file and read the contents into a new SymbolLibrary object. The read is protected by
  * a try-catch block to intercept any exceptions thrown by the read routines. If there were no
  * errors an ImportLibraryCommand is created and pushed onto the symbol library undo stack.
  * This will copy all the symbols from the imported library into the current library.
  * Any errors will display a suitable error message.
  */
 void MainWindow::importLibrary()
 {
     QUrl url = QFileDialog::getOpenFileUrl(this, i18n("Import library"), QUrl::fromLocalFile(QDir::homePath()), i18n("Cross Stitch Symbols (*.sym)"));
 
     if (url.isEmpty()) {
         return;
     }
 
     if (url.isValid()) {
         QTemporaryFile tmpFile;
 
         if (tmpFile.open()) {
             KIO::FileCopyJob *job = KIO::file_copy(url, QUrl::fromLocalFile(tmpFile.fileName()), -1, KIO::Overwrite);
 
             if (job->exec()) {
                 SymbolLibrary *lib = new SymbolLibrary;
                 QDataStream stream(&tmpFile);
 
                 try {
                     stream >> *lib;
                     m_symbolLibrary->undoStack()->push(new ImportLibraryCommand(m_symbolLibrary, lib));
                 } catch (const InvalidFile &e) {
                     KMessageBox::sorry(0, i18n("This doesn't appear to be a valid symbol file"));
                 } catch (const InvalidFileVersion &e) {
                     KMessageBox::sorry(0, i18n("Version %1 of the library file is not supported in this version of SymbolEditor", e.version));
                 }
             } else {
                 KMessageBox::sorry(0, job->errorString());
             }
         } else {
             KMessageBox::sorry(0, tmpFile.errorString());
         }
     } else {
         KMessageBox::sorry(0, i18n("The url %1 is invalid", url.fileName()));
     }
 }
 
 
 /**
  * Close the current library.
  * Check if the current symbol and the symbol library need to be saved and then clear
  * the library and the editor.
  */
 void MainWindow::close()
 {
     if (editorClean() && libraryClean()) {
         m_editor->clear();
         m_symbolLibrary->clear();
         m_url = QUrl(i18n("Untitled"));
     }
 }
 
 
 /**
  * Quit the application.
  * Closes this MainWindow.
  */
 void MainWindow::quit()
 {
     KXmlGuiWindow::close();
 }
 
 
 /**
  * Undo the last operation.
  * Several undo stacks will be available. One for the library object and one for the editor.
  * Changing the tab will update the actions depending on the contents of the relevant undo stack.
  */
 void MainWindow::undo()
 {
     m_undoGroup.undo();
 }
 
 
 /**
  * Redo the last operation undone.
  * Several undo stacks will be available. One for the library object and one for the editor.
  * Changing the tab will update the actions depending on the contents of the relevant undo stack.
  */
 void MainWindow::redo()
 {
     m_undoGroup.redo();
 }
 
 
 /**
  * Update the undo action text to reflect the last operation available to undo.
  * Several undo stacks will be available. One for the library object and one for the editor.
  * Changing the tab will update the actions depending on the contents of the relevant undo stack.
  *
  * @param text the text string to describe the operation
  */
 void MainWindow::undoTextChanged(const QString &text)
 {
     actionCollection()->action("edit_undo")->setText(QString(i18n("Undo %1", text)));
 }
 
 
 /**
  * Update the redo action text to reflect the last operation available to redo.
  * Several undo stacks will be available. One for the library object and one for the editor.
  * Changing the tab will update the actions depending on the contents of the relevant undo stack.
  *
  * @param text the text string to describe the operation
  */
 void MainWindow::redoTextChanged(const QString &text)
 {
     actionCollection()->action("edit_redo")->setText(QString(i18n("Redo %1", text)));
 }
 
 
 /**
  * Update the caption based on the state of the undo stack.
  *
  * @param clean true if the symbol has not been changed, false otherwise
  */
 void MainWindow::cleanChanged(bool clean)
 {
     QString tab;
 
     if (m_tabWidget->currentIndex() == 1) {
         tab = QString(i18nc("The library tab title %1 is the file name", "%1 Library", m_url.fileName()));
     } else {
         tab = QString(i18nc("The editor tab title %1 is the file name", "%1 Editor", m_url.fileName()));
     }
 
     setCaption(tab, !clean);
 }
 
 
 /**
  * Change the tab selected.
  * This is connected to the QTabWidget::currentChanged() slot and indicates that the current tab
  * has changed. This allows the undo stack connections to be modified.
  *
  * @param index the index of the page
  */
 void MainWindow::currentChanged(int index)
 {
     if (index == 0) { // Editor
         m_undoGroup.setActiveStack(m_editor->undoStack());
         m_editor->updateStatusMessage();
     } else if (index == 1) { // QListWidget
         m_undoGroup.setActiveStack(m_symbolLibrary->undoStack());
         statusBar()->clearMessage();
     }
 }
 
 
 /**
  * Edit an existing symbol from the symbol library.
  * Check if the current symbol being edited has been changed. If yes, ask if it should be
  * saved or discarded.
  * Clear the contents of the editor and assign a copy of the item symbol to it to edit.
  * The actions are updated to reflect the settings of the symbol being edited.
  *
  * @param item a pointer to a QListWidgetItem that was double clicked.
  */
 void MainWindow::itemSelected(QListWidgetItem *item)
 {
     QPair<qint16, Symbol> pair;
 
     if (editorClean()) {
         m_editor->clear();
         pair.first = static_cast<qint16>(item->data(Qt::UserRole).toInt());
         pair.second = m_symbolLibrary->symbol(pair.first);
         m_editor->setSymbol(pair);
         setActionsFromSymbol(pair.second);
         m_tabWidget->setCurrentIndex(0);
     }
 }
 
 
 /**
  * Display a context menu for the list widget.
  * Options:
  *  Delete Symbol
  *
  * @param pos a const reference to a QPoint representing the cursor position
  */
 void MainWindow::listWidgetContextMenuRequested(const QPoint &pos)
 {
     if ((m_item = m_listWidget->itemAt(pos))) {
         if (!m_menu) {
             m_menu = new QMenu;
             m_menu->addAction(i18n("Delete Symbol"), this, SLOT(deleteSymbol()));
         }
 
         m_menu->popup(QCursor::pos());
     }
 }
 
 
 /**
  * Delete the symbol pointed to by m_item.
  */
 void MainWindow::deleteSymbol()
 {
     m_symbolLibrary->undoStack()->push(new DeleteSymbolCommand(m_symbolLibrary, static_cast<qint16>(m_item->data(Qt::UserRole).toInt())));
 }
 
 
 /**
  * Configure the application.
  * Display the configuration dialog, creating it if necessary.
  */
 void MainWindow::preferences()
 {
     if (KConfigDialog::showDialog("preferences")) {
         return;
     }
 
     KConfigDialog *dialog = new KConfigDialog(this, "preferences", Configuration::self());
     dialog->setFaceType(KPageDialog::List);
 
     dialog->addPage(new EditorConfigPage(0, "EditorConfigPage"), i18nc("The Editor configuration page", "Editor"), "preferences-desktop");
 //    dialog->setHelp("ConfigurationDialog");
 
     connect(dialog, SIGNAL(settingsChanged(QString)), m_editor, SLOT(readSettings()));
 
     dialog->show();
 }
 
 
 /**
  * Set up the applications actions.
  * Create standard actions.
  * Create other actions, setting the icon and data as required.
  * Several actions are added to groups which are set as exclusive.
  * All actions are added to the applications QActionCollection.
  */
 void MainWindow::setupActions()
 {
     QAction *action;
     QActionGroup *actionGroup;
 
     KActionCollection *actions = actionCollection();
 
     // File menu
     KStandardAction::open(this, SLOT(fileOpen()), actions);
     KStandardAction::openNew(this, SLOT(newSymbol()), actions);
     KStandardAction::openRecent(this, SLOT(fileOpen(QUrl)), actions)->loadEntries(KConfigGroup(KSharedConfig::openConfig(), "RecentFiles"));
     KStandardAction::save(this, SLOT(save()), actions);
     KStandardAction::saveAs(this, SLOT(saveAs()), actions);
 
     action = new QAction(this);
     action->setText(i18n("Import Library"));
     action->setWhatsThis(i18n("Imports another library appending the symbols it contains to the current library."));
     connect(action, SIGNAL(triggered()), this, SLOT(importLibrary()));
     actions->addAction("importLibrary", action);
 
     action = new QAction(this);
     action->setText(i18n("Save Symbol"));
     action->setWhatsThis(i18n("Save the symbol to the library. If this is a new symbol, subsequent saves will create additional symbols in the library. If the symbol was selected from the library to edit then saving will update that symbol in the library."));
     action->setIcon(QIcon::fromTheme("symboleditor-save-symbol"));
     connect(action, SIGNAL(triggered()), this, SLOT(saveSymbol()));
     actions->addAction("saveSymbol", action);
 
     action = new QAction(this);
     action->setText(i18n("Save Symbol as New"));
     action->setWhatsThis(i18n("Save the current symbol as a new one in the library. Subsequent saves will update the new symbol."));
     connect(action, SIGNAL(triggered()), this, SLOT(saveSymbolAsNew()));
     actions->addAction("saveSymbolAsNew", action);
 
     KStandardAction::close(this, SLOT(close()), actions);
     KStandardAction::quit(this, SLOT(quit()), actions);
 
     // Edit menu
     KStandardAction::undo(this, SLOT(undo()), actions);
     KStandardAction::redo(this, SLOT(redo()), actions);
 
     // Rendering menu
     action = new QAction(this);
     action->setText(i18n("Fill Path"));
     action->setWhatsThis(i18n("Enable path filling. The path defines the closed boundary of the shape and the path is filled with the selected fill method."));
     action->setIcon(QIcon::fromTheme("format-fill-color"));
     action->setCheckable(true);
     connect(action, SIGNAL(triggered(bool)), m_editor, SLOT(selectFilled(bool)));
     actions->addAction("fillPath", action);
 
     actionGroup = new QActionGroup(this);
     actionGroup->setExclusive(true);
 
     action = new QAction(this);
     action->setText(i18n("Odd Even Fill"));
     action->setWhatsThis(i18n("The Odd Even fill method will fill alternate areas of the symbol."));
     action->setData(Qt::OddEvenFill);
     action->setIcon(QIcon::fromTheme("symboleditor-odd-even-fill"));
     action->setCheckable(true);
     actions->addAction("oddEvenFill", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Winding Fill"));
     action->setWhatsThis(i18n("The Winding fill method will fill the complete interior of the path."));
     action->setData(Qt::WindingFill);
     action->setIcon(QIcon::fromTheme("symboleditor-winding-fill"));
     action->setCheckable(true);
     actions->addAction("windingFill", action);
     actionGroup->addAction(action);
 
     connect(actionGroup, SIGNAL(triggered(QAction*)), m_editor, SLOT(selectFillRule(QAction*)));
 
     actionGroup = new QActionGroup(this);
     actionGroup->setExclusive(true);
 
     action = new QAction(this);
     action->setText(i18n("Flat Cap"));
     action->setWhatsThis(i18n("The Flat Cap end type provides a square end that stops at the end point of the line.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::FlatCap);
     action->setIcon(QIcon::fromTheme("stroke-cap-butt"));
     action->setCheckable(true);
     actions->addAction("flatCap", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Square Cap"));
     action->setWhatsThis(i18n("The Square Cap end type provides a square end that projects beyond the end point of the line by half the line width.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::SquareCap);
     action->setIcon(QIcon::fromTheme("stroke-cap-square"));
     action->setCheckable(true);
     actions->addAction("squareCap", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Round Cap"));
     action->setWhatsThis(i18n("The Round Cap end type provides a round end that projects beyond the end point of the line with a radius of half the line width.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::RoundCap);
     action->setIcon(QIcon::fromTheme("stroke-cap-round"));
     action->setCheckable(true);
     actions->addAction("roundCap", action);
     actionGroup->addAction(action);
 
     connect(actionGroup, SIGNAL(triggered(QAction*)), m_editor, SLOT(selectCapStyle(QAction*)));
 
     actionGroup = new QActionGroup(this);
     actionGroup->setExclusive(true);
 
     action = new QAction(this);
     action->setText(i18n("Bevel Join"));
     action->setWhatsThis(i18n("The Bevel Join provides a beveled corner between two lines.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::BevelJoin);
     action->setIcon(QIcon::fromTheme("stroke-join-bevel"));
     action->setCheckable(true);
     actions->addAction("bevelJoin", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Miter Join"));
     action->setWhatsThis(i18n("The Miter Join provides a mitered corner between two lines.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::MiterJoin);
     action->setIcon(QIcon::fromTheme("stroke-join-miter"));
     action->setCheckable(true);
     actions->addAction("miterJoin", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Round Join"));
     action->setWhatsThis(i18n("The Round Join provides a rounded corner between two lines using a radius of half the line width.\n\nThis is only applicable to non-filled paths."));
     action->setData(Qt::RoundJoin);
     action->setIcon(QIcon::fromTheme("stroke-join-round"));
     action->setCheckable(true);
     actions->addAction("roundJoin", action);
     actionGroup->addAction(action);
 
     connect(actionGroup, SIGNAL(triggered(QAction*)), m_editor, SLOT(selectJoinStyle(QAction*)));
 
     action = new QAction(this);
     action->setText(i18n("Increase Line Width"));
     action->setWhatsThis(i18n("Increases the line width.\n\nThis is only applicable to non-filled paths."));
     action->setIcon(QIcon::fromTheme("symboleditor-increase-line-width"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(increaseLineWidth()));
     actions->addAction("increaseLineWidth", action);
 
     action = new QAction(this);
     action->setText(i18n("Decrease Line Width"));
     action->setWhatsThis(i18n("Decreases the line width.\n\nThis is only applicable to non-filled paths."));
     action->setIcon(QIcon::fromTheme("symboleditor-decrease-line-width"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(decreaseLineWidth()));
     actions->addAction("decreaseLineWidth", action);
 
     // Tools Menu
     actionGroup = new QActionGroup(this);
     actionGroup->setExclusive(true);
 
     action = new QAction(this);
     action->setText(i18n("Move To"));
     action->setWhatsThis(i18n("Move the current point to a new position. This implicitly closes any existing sub path, starting a new one."));
     action->setData(Editor::MoveTo);
     action->setIcon(QIcon::fromTheme("go-jump"));
     action->setCheckable(true);
     actions->addAction("moveTo", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Draw To"));
     action->setWhatsThis(i18n("Add a straight line from the current position to a defined end point. The end point becomes the new current position."));
     action->setData(Editor::LineTo);
     action->setIcon(QIcon::fromTheme("draw-line"));
     action->setCheckable(true);
     actions->addAction("lineTo", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Cubic To"));
     action->setWhatsThis(i18n("Add a cubic bezier curve from the current position using two control points and an end point. The end point becomes the new current position."));
     action->setData(Editor::CubicTo);
     action->setIcon(QIcon::fromTheme("draw-bezier-curves"));
     action->setCheckable(true);
     actions->addAction("cubicTo", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Rectangle"));
     action->setWhatsThis(i18n("Add a rectangle as a separate sub path defined by two points representing the opposite corners."));
     action->setData(Editor::Rectangle);
     action->setIcon(QIcon::fromTheme("draw-rectangle"));
     action->setCheckable(true);
     actions->addAction("rectangle", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Ellipse"));
     action->setWhatsThis(i18n("Add an ellipse as a separate sub path defined by a bounding rectangle represented by two opposite corners."));
     action->setData(Editor::Ellipse);
     action->setIcon(QIcon::fromTheme("draw-ellipse"));
     action->setCheckable(true);
     actions->addAction("ellipse", action);
     actionGroup->addAction(action);
 
     action = new QAction(this);
     action->setText(i18n("Insert Character"));
     action->setWhatsThis(i18n("Allows selection of a character from any font to be inserted as a closed sub path. The inserted character will overwrite any existing path, but additional sub paths may be added to the character."));
     action->setData(Editor::Character);
     action->setIcon(QIcon::fromTheme("insert-text"));
     action->setCheckable(true);
     actions->addAction("character", action);
     actionGroup->addAction(action);
 
     connect(actionGroup, SIGNAL(triggered(QAction*)), m_editor, SLOT(selectTool(QAction*)));
 
     action = new QAction(this);
     action->setText(i18n("Rotate Left"));
     action->setWhatsThis(i18n("Rotate all the points of a path counter-clockwise 90 degrees around the center of the editor."));
     action->setIcon(QIcon::fromTheme("object-rotate-left"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(rotateLeft()));
     actions->addAction("rotateLeft", action);
 
     action = new QAction(this);
     action->setText(i18n("Rotate Right"));
     action->setWhatsThis(i18n("Rotate all the points of a path clockwise 90 degrees around the center point of the editor."));
     action->setIcon(QIcon::fromTheme("object-rotate-right"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(rotateRight()));
     actions->addAction("rotateRight", action);
 
     action = new QAction(this);
     action->setText(i18n("Flip Horizontal"));
     action->setWhatsThis(i18n("Flip all the points of the path horizontally about the vertical center of the editor."));
     action->setIcon(QIcon::fromTheme("object-flip-horizontal"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(flipHorizontal()));
     actions->addAction("flipHorizontal", action);
 
     action = new QAction(this);
     action->setText(i18n("Flip Vertical"));
     action->setWhatsThis(i18n("Flip all the points of the path vertically about the horizontal center of the editor."));
     action->setIcon(QIcon::fromTheme("object-flip-vertical"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(flipVertical()));
     actions->addAction("flipVertical", action);
 
     action = new QAction(this);
     action->setText(i18n("Scale to Preferred Size"));
     action->setWhatsThis(i18n("Scale the current symbol so that it fits within the preferred size of a symbol."));
     action->setIcon(QIcon::fromTheme("symboleditor-scale-preferred"));
     connect(action, SIGNAL(triggered()), m_editor, SLOT(scalePreferred()));
     actions->addAction("scalePreferred", action);
 
     action = new QAction(this);
     action->setText(i18n("Enable Snap"));
     action->setWhatsThis(i18n("Enable snapping of points to guide intersections or to the grid."));
     action->setIcon(QIcon::fromTheme("snap-orthogonal"));
     action->setCheckable(true);
     connect(action, SIGNAL(toggled(bool)), m_editor, SLOT(enableSnap(bool)));
     actions->addAction("enableSnap", action);
 
     action = new QAction(this);
     action->setText(i18n("Enable Guides"));
     action->setWhatsThis(i18n("Enable the generation of guide intersections."));
     action->setIcon(QIcon::fromTheme("snap-intersection"));
     action->setCheckable(true);
     connect(action, SIGNAL(toggled(bool)), m_editor, SLOT(enableGuides(bool)));
     actions->addAction("enableGuides", action);
 
     // Settings Menu
     KStandardAction::preferences(this, SLOT(preferences()), actions);
 }
 
 
 /**
  * Set the actions status based on the settings in the specified Symbol.
  *
  * @param symbol a const reference to a Symbol
  */
 void MainWindow::setActionsFromSymbol(const Symbol &symbol)
 {
     action("fillPath")->setChecked(symbol.filled());
 
     switch (symbol.path().fillRule()) {
     case Qt::WindingFill:
         action("windingFill")->setChecked(true);
         break;
 
     case Qt::OddEvenFill:
         action("oddEvenFill")->setChecked(true);
         break;
     }
 
     switch (symbol.capStyle()) {
     case Qt::FlatCap:
         action("flatCap")->setChecked(true);
         break;
 
     case Qt::SquareCap:
         action("squareCap")->setChecked(true);
         break;
 
     case Qt::RoundCap:
         action("roundCap")->setChecked(true);
         break;
 
     case Qt::MPenCapStyle: // this is a combination of the Qt::FlatCap, Qt::SquareCap and Qt::RoundCap
         break;
     }
 
     switch (symbol.joinStyle()) {
     case Qt::BevelJoin:
         action("bevelJoin")->setChecked(true);
         break;
 
     case Qt::MiterJoin:
     case Qt::SvgMiterJoin:
         action("miterJoin")->setChecked(true);
         break;
 
     case Qt::RoundJoin:
         action("roundJoin")->setChecked(true);
         break;
 
     case Qt::MPenJoinStyle: // this is a combination of Qt::BevelJoin, Qt::MiterJoin, Qt::SvgMiterJoin and Qt::RoundJoin
         break;
     }
 
     action("increaseLineWidth")->setDisabled(symbol.lineWidth() == 1.00);
     action("decreaseLineWidth")->setDisabled(symbol.lineWidth() == 0.01);
 }