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# Code for Text Edit

    /****************************************************************************
     **
     ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of Qt Jambi.
     **
     ** ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.

     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

    package com.trolltech.demos;

    import com.trolltech.examples.QtJambiExample;
    import com.trolltech.qt.core.*;
    import com.trolltech.qt.gui.*;

    import static com.trolltech.qt.gui.QKeySequence.StandardKey;

    @QtJambiExample(name = "Text Edit")
    public class TextEdit extends QMainWindow {

        private void init() {
            setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));

            setupFileActions();
            setupEditActions();
            setupTextActions();

            textEdit = new QTextEdit(this);
            textEdit.currentCharFormatChanged.connect(this,
                    "currentCharFormatChanged(QTextCharFormat)");

            setCentralWidget(textEdit);
            textEdit.setFocus();
            setCurrentFileName("");

            fontChanged(textEdit.font());
            colorChanged(textEdit.textColor());
            alignmentChanged(textEdit.alignment());

            textEdit.document().modificationChanged.connect(actionSave,
                    "setEnabled(boolean)");
            textEdit.document().modificationChanged.connect(this,
                    "setWindowModified(boolean)");
            textEdit.document().undoAvailable.connect(actionUndo,
                    "setEnabled(boolean)");
            textEdit.document().redoAvailable.connect(actionRedo,
                    "setEnabled(boolean)");

            setWindowModified(textEdit.document().isModified());
            actionSave.setEnabled(textEdit.document().isModified());
            actionUndo.setEnabled(textEdit.document().isUndoAvailable());
            actionRedo.setEnabled(textEdit.document().isRedoAvailable());

            actionUndo.triggered.connect(textEdit.document(), "undo()");
            actionRedo.triggered.connect(textEdit.document(), "redo()");

            actionCut.setEnabled(false);
            actionCopy.setEnabled(false);

            actionCut.triggered.connect(textEdit, "cut()");
            actionCopy.triggered.connect(textEdit, "copy()");
            actionPaste.triggered.connect(textEdit, "paste()");

            textEdit.copyAvailable.connect(actionCut, "setEnabled(boolean)");
            textEdit.copyAvailable.connect(actionCopy, "setEnabled(boolean)");

            QApplication.clipboard().dataChanged.connect(this,
                    "clipboardDataChanged()");

            String initialFile = "classpath:com/trolltech/demos/example.html";

            if (!load(initialFile))
                fileNew();

            initialized = true;

            resize(640, 800);
        }

        @Override
        protected void showEvent(QShowEvent e) {
            if (!initialized)
                init();
            super.showEvent(e);
        }

        @Override
        protected void closeEvent(QCloseEvent e) {
            if (maybeSave())
                e.accept();
            else
                e.ignore();
        }

        private QAction action(String name, String image, Object shortcut, String slot,
                               QMenu menu, QToolBar toolBar) {
            QAction a = new QAction(name, this);

            if (image != null) a.setIcon(new QIcon(rsrcPath + "/" + image + ".png"));
            if (menu != null) menu.addAction(a);
            if (toolBar != null) toolBar.addAction(a);
            if (slot != null) a.triggered.connect(this, slot);

            if (shortcut instanceof String)
                a.setShortcut((String) shortcut);
            else if (shortcut instanceof QKeySequence.StandardKey)
                a.setShortcuts((QKeySequence.StandardKey) shortcut);

            return a;
        }

        private void setupFileActions() {
            QToolBar tb = new QToolBar(this);
            tb.setWindowTitle(tr("File Actions"));
            addToolBar(tb);

            QMenu menu = new QMenu(tr("&File"), this);
            menuBar().addMenu(menu);

            action(tr("&New"), "filenew", StandardKey.New, "fileNew()", menu, null);
            action(tr("Open"), "fileopen", StandardKey.Open, "fileOpen()", menu, tb);
            menu.addSeparator();
            actionSave = action(tr("&Save"), "filesave", StandardKey.Save, "fileSave()", menu, tb);
            action(tr("Save &As..."), null, null, "fileSaveAs()", menu, null);
            menu.addSeparator();
            action(tr("&Print"), "fileprint", StandardKey.Print, "filePrint()", menu, tb);
            action(tr("&Export PDF..."), "exportpdf", null, "filePrintPdf()", menu, tb);
            menu.addSeparator();
            action(tr("&Quit"), null, "Ctrl+Q", "close()", menu, null);
        }

        private void setupEditActions() {
            QToolBar b = new QToolBar(this);
            b.setWindowTitle(tr("Edit Actions"));
            addToolBar(b);

            QMenu m = new QMenu(tr("&Edit"), this);
            menuBar().addMenu(m);

            actionUndo = action(tr("&Undo"), "editundo", StandardKey.Undo, null, m, b);
            actionRedo = action(tr("&Redo"), "editredo", StandardKey.Redo, null, m, b);
            actionCut = action(tr("Cu&t"), "editcut", StandardKey.Cut, null, m, b);
            actionCopy = action(tr("&Copy"), "editcopy", StandardKey.Copy, null, m, b);
            actionPaste = action(tr("&Paste"), "editpaste", StandardKey.Paste, null, m, b);

            actionPaste.setEnabled(QApplication.clipboard().text().length() > 0);
        }

        private void updateActionVisuals(QAction a, boolean bold, boolean underline, boolean italic, boolean checkable) {
            QFont font = new QFont();
            font.setBold(bold);
            font.setUnderline(underline);
            font.setItalic(italic);
            a.setFont(font);
            a.setCheckable(checkable);
        }

        private QAction actionGroupEntry(String name, String image, String shortcut, QActionGroup grp) {
            QAction action = new QAction(name, grp);
            action.setIcon(new QIcon(rsrcPath + "/" + image + ".png"));
            action.setCheckable(true);
            return action;
        }

        private void setupTextActions() {
            QToolBar b = new QToolBar(this);
            b.setWindowTitle(tr("Format Actions"));
            addToolBar(b);

            QMenu m = new QMenu(tr("F&ormat"), this);
            menuBar().addMenu(m);

            actionTextBold = action(tr("&Bold"), "textbold", "Ctrl+B", "textBold()", m, b);
            actionTextItalic = action(tr("&Italic"), "textitalic", "Ctrl+I", "textItalic()", m, b);
            actionTextUnderline = action(tr("&Underline"), "textunder", "Ctrl+U", "textUnderline()", m, b);
            m.addSeparator();

            updateActionVisuals(actionTextBold, true, false, false, true);
            updateActionVisuals(actionTextItalic, false, true, false, true);
            updateActionVisuals(actionTextUnderline, false, false, true, true);

            QActionGroup grp = new QActionGroup(this);
            grp.triggered.connect(this, "textAlign(QAction)");

            actionAlignLeft = actionGroupEntry(tr("&Left"), "textleft", "Ctrl+L", grp);
            actionAlignCenter = actionGroupEntry(tr("C&enter"), "textcenter", "Ctrl+E", grp);
            actionAlignRight = actionGroupEntry(tr("&Right"), "textright", "Ctrl+R", grp);
            actionAlignJustify = actionGroupEntry(tr("&Justify"), "textjustify", "Ctrl+J", grp);
            b.addActions(grp.actions());
            m.addActions(grp.actions());

            m.addSeparator();

            QPixmap pix = new QPixmap(16, 16);
            pix.fill(QColor.black);
            actionTextColor = new QAction(new QIcon(pix), "&Color...", this);
            actionTextColor.triggered.connect(this, "textColor()");
            b.addAction(actionTextColor);
            m.addAction(actionTextColor);

            b = new QToolBar(this);
            b.setAllowedAreas(new Qt.ToolBarAreas(Qt.ToolBarArea.TopToolBarArea, Qt.ToolBarArea.BottomToolBarArea));
            b.setWindowTitle(tr("Format Actions"));
            addToolBarBreak(Qt.ToolBarArea.TopToolBarArea);
            addToolBar(b);

            comboStyle = new QComboBox(b);
            b.addWidget(comboStyle);
            comboStyle.addItem(tr("Standard"), null);
            comboStyle.addItem(tr("Bullet List (Disc)"), null);
            comboStyle.addItem(tr("Bullet List (Circle)"), null);
            comboStyle.addItem(tr("Bullet List (Square)"), null);
            comboStyle.addItem(tr("Ordered List (Decimal)"), null);
            comboStyle.addItem(tr("Ordered List (Alpha lower)"), null);
            comboStyle.addItem(tr("Ordered List (Alpha upper)"), null);
            comboStyle.activatedIndex.connect(this, "textStyle(int)");

            comboFont = new QComboBox(b);
            b.addWidget(comboFont);
            comboFont.setEditable(true);
            QFontDatabase db = new QFontDatabase();
            comboFont.addItems(db.families());
            comboFont.activated.connect(this, "textFamily(String)");
            comboFont.setCurrentIndex(comboFont.findText(QApplication.font()
                    .family(), new Qt.MatchFlags(Qt.MatchFlag.MatchExactly, Qt.MatchFlag.MatchCaseSensitive)));

            comboSize = new QComboBox(b);
            comboSize.setObjectName("comboSize");
            b.addWidget(comboSize);
            comboSize.setEditable(true);

            for (int i = 0; i < QFontDatabase.standardSizes().size(); ++i) {
                int size = QFontDatabase.standardSizes().get(i);
                comboSize.addItem("" + size, null);
            }

            comboSize.activated.connect(this, "textSize(String)");
            comboSize.setCurrentIndex(comboSize.findText(""
                    + QApplication.font().pointSize(),
                    new Qt.MatchFlags(Qt.MatchFlag.MatchExactly, Qt.MatchFlag.MatchCaseSensitive)));
        }

        public boolean load(String f) {
            if (!QFile.exists(f))
                return false;
            QFile file = new QFile(f);
            if (!file.open(new QFile.OpenMode(QFile.OpenModeFlag.ReadOnly)))
                return false;

            QByteArray data = file.readAll();
            file.dispose();
            QTextCodec codec = QTextCodec.codecForHtml(data);
            String str = codec.toUnicode(data);

            if (str.toLowerCase().indexOf("<html") >= 0)
                textEdit.setHtml(str);
            else
                textEdit.setPlainText(str);

            setCurrentFileName(f);
            return true;
        }

        public boolean maybeSave() {
            if (!textEdit.document().isModified())
                return true;
            QMessageBox.StandardButton ret = QMessageBox.warning(this,
                                          tr("Application"),
                                          tr("The document has been modified.\nSave your changes?"),
                                          new QMessageBox.StandardButtons(QMessageBox.StandardButton.Ok, QMessageBox.StandardButton.Discard, QMessageBox.StandardButton.Cancel));
            if (ret == QMessageBox.StandardButton.Yes)
                return fileSave();
            else if (ret == QMessageBox.StandardButton.Cancel)
                return false;
            return true;
        }

        public void setCurrentFileName(String fileName) {
            this.fileName = fileName;
            textEdit.document().setModified(false);

            String shownName;
            if (fileName.length() == 0)
                shownName = "untitled.txt";
            else
                shownName = new QFileInfo(fileName).fileName();

            setWindowTitle(shownName + "[*] - Rich Text");
            setWindowModified(false);
        }

        public void fileNew() {
            if (maybeSave()) {
                textEdit.clear();
                setCurrentFileName("");
            }
        }

        public void fileOpen() {
            String fn = QFileDialog.getOpenFileName(this, tr("Open File..."), "",
                    new QFileDialog.Filter(tr("HTML-Files (*.htm *.html);;All Files (*)")));
            if (fn.length() != 0)
                load(fn);
        }

        public boolean fileSave() {
            if (fileName.length() == 0)
                return fileSaveAs();

            QFile file = new QFile(fileName);
            if (!file.open(new QFile.OpenMode(QFile.OpenModeFlag.WriteOnly)))
                return false;
            QTextStream ts = new QTextStream(file);
            QByteArray codecName = new QByteArray("UTF-8");
            ts.setCodec(QTextCodec.codecForName(codecName));
            ts.writeString(textEdit.document().toHtml(codecName));
            textEdit.document().setModified(false);
            file.close();
            file.dispose();
            return true;
        }

        public boolean fileSaveAs() {
            String fn = QFileDialog.getSaveFileName(this, tr("Save as..."), "",
                    new QFileDialog.Filter(tr("HTML-Files (*.htm *.html);;All Files (*)")));
            if (fn.length() == 0)
                return false;
            setCurrentFileName(fn);
            return fileSave();
        }

        public void filePrint() {
            QPrinter printer = new QPrinter(QPrinter.PrinterMode.HighResolution);
            printer.setFullPage(true);
            QPrintDialog dlg = new QPrintDialog(printer, this);
            if (dlg.exec() == QDialog.DialogCode.Accepted.value()) {
                textEdit.document().print(printer);
            }
        }

        public void filePrintPdf() {
            String fileName = QFileDialog.getSaveFileName(this, tr("Export PDF"), "",
                    new QFileDialog.Filter("*.pdf"));
            if (fileName.length() == 0)
                return;
            QPrinter printer = new QPrinter(QPrinter.PrinterMode.HighResolution);
            printer.setOutputFormat(QPrinter.OutputFormat.PdfFormat);
            printer.setOutputFileName(fileName);
            textEdit.document().print(printer);
        }

        public void textBold() {
            textEdit.setFontWeight(actionTextBold.isChecked()
                    ? QFont.Weight.Bold.value()
                    : QFont.Weight.Normal.value());
        }

        public void textUnderline() {
            textEdit.setFontUnderline(actionTextUnderline.isChecked());
        }

        public void textItalic() {
            textEdit.setFontItalic(actionTextItalic.isChecked());
        }

        public void textFamily(String f) {
            textEdit.setFontFamily(f);
        }

        public void textSize(String p) {
            textEdit.setFontPointSize(new Float(p));
        }

        public void textStyle(int styleIndex) {
            QTextCursor cursor = textEdit.textCursor();

            if (styleIndex != 0) {
                QTextListFormat.Style style = QTextListFormat.Style.ListDisc;

                switch (styleIndex) {
                default:
                case 1:
                    style = QTextListFormat.Style.ListDisc;
                    break;
                case 2:
                    style = QTextListFormat.Style.ListCircle;
                    break;
                case 3:
                    style = QTextListFormat.Style.ListSquare;
                    break;
                case 4:
                    style = QTextListFormat.Style.ListDecimal;
                    break;
                case 5:
                    style = QTextListFormat.Style.ListLowerAlpha;
                    break;
                case 6:
                    style = QTextListFormat.Style.ListUpperAlpha;
                    break;
                }

                cursor.beginEditBlock();

                QTextBlockFormat blockFmt = cursor.blockFormat();

                QTextListFormat listFmt = new QTextListFormat();

                if (cursor.currentList() != null) {
                    listFmt = cursor.currentList().textListFormat();
                } else {
                    listFmt.setIndent(blockFmt.indent() + 1);
                    blockFmt.setIndent(0);
                    cursor.setBlockFormat(blockFmt);
                }

                listFmt.setStyle(style);

                cursor.createList(listFmt);

                cursor.endEditBlock();
            } else {
                QTextBlockFormat bfmt = new QTextBlockFormat();
                bfmt.setObjectIndex(-1);
                cursor.mergeBlockFormat(bfmt);
            }
        }

        public void textColor() {
            QColor col = QColorDialog.getColor(textEdit.textColor(), this);
            if (!col.isValid())
                return;
            textEdit.setTextColor(col);
            colorChanged(col);
        }

        public void textAlign(QAction a) {
            if (a == actionAlignLeft)
                textEdit.setAlignment(new Qt.Alignment(Qt.AlignmentFlag.AlignLeft));
            else if (a == actionAlignCenter)
                textEdit.setAlignment(new Qt.Alignment(Qt.AlignmentFlag.AlignHCenter));
            else if (a == actionAlignRight)
                textEdit.setAlignment(new Qt.Alignment(Qt.AlignmentFlag.AlignRight));
            else if (a == actionAlignJustify)
                textEdit.setAlignment(new Qt.Alignment(Qt.AlignmentFlag.AlignJustify));
        }

        public void currentCharFormatChanged(QTextCharFormat format) {
            fontChanged(format.font());
            colorChanged(format.foreground().color());
            alignmentChanged(textEdit.alignment());
        }

        public void clipboardDataChanged() {
            actionPaste.setEnabled(QApplication.clipboard().text().length() > 0);
        }

        public void fontChanged(QFont f) {
            comboFont.setCurrentIndex(comboFont.findText(f.family(),
                    new Qt.MatchFlags(Qt.MatchFlag.MatchExactly, Qt.MatchFlag.MatchCaseSensitive)));
            comboSize.setCurrentIndex(comboSize.findText(Integer.toString(f.pointSize()),
                    new Qt.MatchFlags(Qt.MatchFlag.MatchExactly, Qt.MatchFlag.MatchCaseSensitive)));
            actionTextBold.setChecked(f.bold());
            actionTextItalic.setChecked(f.italic());
            actionTextUnderline.setChecked(f.underline());
        }

        public void colorChanged(QColor c) {
            QPixmap pix = new QPixmap(16, 16);
            pix.fill(c);
            actionTextColor.setIcon(new QIcon(pix));
        }

        public void alignmentChanged(Qt.Alignment a) {
            if (a.isSet(Qt.AlignmentFlag.AlignLeft))
                actionAlignLeft.setChecked(true);
            else if (a.isSet(Qt.AlignmentFlag.AlignHCenter))
                actionAlignCenter.setChecked(true);
            else if (a.isSet(Qt.AlignmentFlag.AlignRight))
                actionAlignRight.setChecked(true);
            else if (a.isSet(Qt.AlignmentFlag.AlignJustify))
                actionAlignJustify.setChecked(true);
        }

        private String fileName;
        private QTextEdit textEdit;
        private QAction actionSave;
        private QAction actionUndo;
        private QAction actionRedo;
        private QAction actionCut;
        private QAction actionCopy;
        private QAction actionPaste;
        private QAction actionTextBold;
        private QAction actionTextItalic;
        private QAction actionTextUnderline;
        private QAction actionTextColor;
        private QAction actionAlignLeft;
        private QAction actionAlignRight;
        private QAction actionAlignCenter;
        private QAction actionAlignJustify;
        private QComboBox comboStyle;
        private QComboBox comboFont;
        private QComboBox comboSize;
        private String rsrcPath = "classpath:com/trolltech/images/textedit/win";
        private boolean initialized = false;

        static public void main(String args[]) {
            QApplication.initialize(args);

            TextEdit mw = new TextEdit();
            if (args.length > 0) {
                mw.init();
                mw.load(args[0]);
            }
            mw.show();

            QApplication.exec();
        }
    }