1 files changed, 144 insertions, 0 deletions
diff --git a/examples/demos/documentviewer/txtviewer/txtviewer.py b/examples/demos/documentviewer/txtviewer/txtviewer.py
new file mode 100644
index 000000000..ef5a38fcd
--- /dev/null
+++ b/examples/demos/documentviewer/txtviewer/txtviewer.py
@@ -0,0 +1,144 @@
+# Copyright (C) 2023 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+from PySide6.QtWidgets import (QDialog, QFileDialog,
+                               QPlainTextEdit)
+from PySide6.QtGui import QAction, QGuiApplication, QIcon, QKeySequence
+from PySide6.QtCore import QDir, QFile, QTextStream, Qt, Slot
+
+from abstractviewer import AbstractViewer
+
+
+class TxtViewer(AbstractViewer):
+    def __init__(self):
+        super().__init__()
+        self.uiInitialized.connect(self.setupTxtUi)
+
+    def init(self, file, parent, mainWindow):
+        self._textEdit = QPlainTextEdit(parent)
+        super().init(file, self._textEdit, mainWindow)
+
+    def viewerName(self):
+        return "TxtViewer"
+
+    def supportedMimeTypes(self):
+        return ["text/plain"]
+
+    @Slot()
+    def setupTxtUi(self):
+        editMenu = self.addMenu("Edit")
+        editToolBar = self.addToolBar("Edit")
+        cutIcon = QIcon.fromTheme(QIcon.ThemeIcon.EditCut,
+                                  QIcon(":/demos/documentviewer/images/cut.png"))
+        cutAct = QAction(cutIcon, "Cut", self)
+        cutAct.setShortcuts(QKeySequence.Cut)
+        cutAct.setStatusTip("Cut the current selection's contents to the clipboard")
+        cutAct.triggered.connect(self._textEdit.cut)
+        editMenu.addAction(cutAct)
+        editToolBar.addAction(cutAct)
+
+        copyIcon = QIcon.fromTheme(QIcon.ThemeIcon.EditCopy,
+                                   QIcon(":/demos/documentviewer/images/copy.png"))
+        copyAct = QAction(copyIcon, "Copy", self)
+        copyAct.setShortcuts(QKeySequence.Copy)
+        copyAct.setStatusTip("Copy the current selection's contents to the clipboard")
+        copyAct.triggered.connect(self._textEdit.copy)
+        editMenu.addAction(copyAct)
+        editToolBar.addAction(copyAct)
+
+        pasteIcon = QIcon.fromTheme(QIcon.ThemeIcon.EditPaste,
+                                    QIcon(":/demos/documentviewer/images/paste.png"))
+        pasteAct = QAction(pasteIcon, "Paste", self)
+        pasteAct.setShortcuts(QKeySequence.Paste)
+        pasteAct.setStatusTip("Paste the clipboard's contents into the current selection")
+        pasteAct.triggered.connect(self._textEdit.paste)
+        editMenu.addAction(pasteAct)
+        editToolBar.addAction(pasteAct)
+
+        self.menuBar().addSeparator()
+
+        cutAct.setEnabled(False)
+        copyAct.setEnabled(False)
+        self._textEdit.copyAvailable.connect(cutAct.setEnabled)
+        self._textEdit.copyAvailable.connect(copyAct.setEnabled)
+
+        self.openFile()
+
+        self._textEdit.textChanged.connect(self._textChanged)
+        self._uiAssets_back.triggered.connect(self._back)
+        self._uiAssets_forward.triggered.connect(self._forward)
+
+    @Slot()
+    def _textChanged(self):
+        self.maybeSetPrintingEnabled(self.hasContent())
+
+    @Slot()
+    def _back(self):
+        bar = self._textEdit.verticalScrollBar()
+        if bar.value() > bar.minimum():
+            bar.setValue(bar.value() - 1)
+
+    @Slot()
+    def _forward(self):
+        bar = self._textEdit.verticalScrollBar()
+        if bar.value() < bar.maximum():
+            bar.setValue(bar.value() + 1)
+
+    def openFile(self):
+        type = "open"
+        file_name = QDir.toNativeSeparators(self._file.fileName())
+        if not self._file.open(QFile.ReadOnly | QFile.Text):
+            err = self._file.errorString()
+            self.statusMessage(f"Cannot read file {file_name}:\n{err}.", type)
+            return
+
+        in_str = QTextStream(self._file)
+        QGuiApplication.setOverrideCursor(Qt.WaitCursor)
+        if self._textEdit.toPlainText():
+            self._textEdit.clear()
+            self.disablePrinting()
+
+        self._textEdit.setPlainText(in_str.readAll())
+        QGuiApplication.restoreOverrideCursor()
+
+        self.statusMessage(f"File {file_name} loaded.", type)
+        self.maybeEnablePrinting()
+
+    def hasContent(self):
+        return bool(self._textEdit.toPlainText())
+
+    def printDocument(self, printer):
+        if not self.hasContent():
+            return
+
+        self._textEdit.print_(printer)
+
+    def saveFile(self, file):
+        file_name = QDir.toNativeSeparators(self._file.fileName())
+        errorMessage = ""
+        QGuiApplication.setOverrideCursor(Qt.WaitCursor)
+        if file.open(QFile.WriteOnly | QFile.Text):
+            out = QTextStream(file)
+            out << self._textEdit.toPlainText()
+        else:
+            error = file.errorString()
+            errorMessage = f"Cannot open file {file_name} for writing:\n{error}."
+        QGuiApplication.restoreOverrideCursor()
+
+        if errorMessage:
+            self.statusMessage(errorMessage)
+            return False
+
+        self.statusMessage(f"File {file_name} saved")
+        return True
+
+    def saveDocumentAs(self):
+        dialog = QFileDialog(self.mainWindow())
+        dialog.setWindowModality(Qt.WindowModal)
+        dialog.setAcceptMode(QFileDialog.AcceptSave)
+        if dialog.exec() != QDialog.Accepted:
+            return False
+
+        files = dialog.selectedFiles()
+        self._file.setFileName(files[0])
+        return self.saveDocument()