diff options
Diffstat (limited to 'examples/corelib/mimetypesbrowser/mainwindow.py')
| -rw-r--r-- | examples/corelib/mimetypesbrowser/mainwindow.py | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/examples/corelib/mimetypesbrowser/mainwindow.py b/examples/corelib/mimetypesbrowser/mainwindow.py new file mode 100644 index 000000000..76404eeb7 --- /dev/null +++ b/examples/corelib/mimetypesbrowser/mainwindow.py @@ -0,0 +1,161 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +from mimetypemodel import MimeTypeModel +from PySide6.QtCore import (QDir, QFileInfo, QMimeDatabase, QModelIndex, Qt, + Slot) +from PySide6.QtGui import QAction, QKeySequence +from PySide6.QtWidgets import (QAbstractItemView, QApplication, QDialog, + QFileDialog, QInputDialog, QMainWindow, + QMessageBox, QSplitter, QTextEdit, QTreeView, + QWidget) + + +class MainWindow(QMainWindow): + def __init__(self, parent: QWidget = None) -> None: + super().__init__(parent=parent) + self.m_find_index: int = 0 + self.m_model = MimeTypeModel(self) + self.m_tree_view = QTreeView(self) + self.m_details_text = QTextEdit(self) + self.m_find_matches = [] + + self.setWindowTitle("Qt Mime Database Browser") + + # create actions + self.detect_file_action = QAction( + "&Detect File Type...", self, shortcut="Ctrl+O", triggered=self.detect_file + ) + self.exit_action = QAction("E&xit", self, shortcut="Ctrl+Q", triggered=self.close) + self.m_find_action = QAction("&Find...", self, shortcut="Ctrl+F", triggered=self.find) + self.m_find_next_action = QAction( + "Find &Next", self, shortcut="Ctrl+G", triggered=self.find_next + ) + self.m_find_previous_action = QAction( + "Find &Previous", + self, + shortcut="Ctrl+Shift+G", + triggered=self.find_previous, + ) + self.about_action = QAction( + "About Qt", + self, + shortcut=QKeySequence(QKeySequence.HelpContents), + triggered=QApplication.aboutQt, + ) + + # add action to menu + self.file_menu = self.menuBar().addMenu("&File") + self.file_menu.addAction(self.detect_file_action) + self.file_menu.addAction(self.exit_action) + self.find_menu = self.menuBar().addMenu("&Edit") + self.find_menu.addAction(self.m_find_action) + self.find_menu.addAction(self.m_find_next_action) + self.find_menu.addAction(self.m_find_previous_action) + self.about_menu = self.menuBar().addMenu("&About") + self.about_menu.addAction(self.about_action) + + self.central_splitter = QSplitter(self) + self.setCentralWidget(self.central_splitter) + + self.m_tree_view.setUniformRowHeights(True) + self.m_tree_view.setModel(self.m_model) + + self.items = self.m_model.findItems( + "application/octet-stream", + Qt.MatchContains | Qt.MatchFixedString | Qt.MatchRecursive, + ) + + if self.items: + self.m_tree_view.expand(self.m_model.indexFromItem(self.items[0])) + + self.m_tree_view.selectionModel().currentChanged.connect(self.current_changed) + self.central_splitter.addWidget(self.m_tree_view) + self.m_details_text.setReadOnly(True) + self.central_splitter.addWidget(self.m_details_text) + + self.update_find_actions() + + @Slot() + def detect_file(self): + file_name = QFileDialog.getOpenFileName(self, "Choose File") + if not file_name: + return + + mime_database = QMimeDatabase() + fi = QFileInfo(file_name[0]) + mime_type = mime_database.mimeTypeForFile(fi) + index = ( + self.m_model.indexForMimeType(mime_type.name()) + if mime_type.isValid() + else QModelIndex() + ) + + if index.isValid(): + self.statusBar().showMessage(f'{fi.fileName()}" is of type "{mime_type.name()}"') + self._select_and_goto(index) + else: + QMessageBox.information( + self, + "Unknown File Type", + f"The type of {QDir.toNativeSeparators(file_name)} could not be determined.", + ) + + @Slot() + def find(self): + input_dialog = QInputDialog(self) + input_dialog.setWindowTitle("Find") + input_dialog.setLabelText("Text") + if input_dialog.exec() != QDialog.Accepted: + return + + value = input_dialog.textValue().strip() + if not value: + return + + self.m_find_matches.clear() + self.m_find_index = 0 + items = self.m_model.findItems( + value, Qt.MatchContains | Qt.MatchFixedString | Qt.MatchRecursive + ) + + for item in items: + self.m_find_matches.append(self.m_model.indexFromItem(item)) + + self.statusBar().showMessage(f'{len(self.m_find_matches)} mime types match "{value}".') + self.update_find_actions() + + if self.m_find_matches: + self._select_and_goto(self.m_find_matches[0]) + + @Slot() + def find_next(self): + self.m_find_index = self.m_find_index + 1 + if self.m_find_index >= len(self.m_find_matches): + self.m_find_index = 0 + if self.m_find_index < len(self.m_find_matches): + self._select_and_goto(self.m_find_matches[self.m_find_index]) + + @Slot() + def find_previous(self): + self.m_find_index = self.m_find_index - 1 + if self.m_find_index < 0: + self.m_find_index = len(self.m_find_matches) - 1 + if self.m_find_index >= 0: + self._select_and_goto(self.m_find_matches[self.m_find_index]) + + @Slot(QModelIndex) + def current_changed(self, index: QModelIndex): + if index.isValid(): + self.m_details_text.setText( + MimeTypeModel.formatMimeTypeInfo(self.m_model.mimeType(index)) + ) + + def update_find_actions(self): + self.find_next_previous_enabled = len(self.m_find_matches) > 1 + self.m_find_next_action.setEnabled(self.find_next_previous_enabled) + self.m_find_previous_action.setEnabled(self.find_next_previous_enabled) + + def _select_and_goto(self, index: QModelIndex): + self.m_tree_view.scrollTo(index, QAbstractItemView.PositionAtCenter) + self.m_tree_view.setCurrentIndex(index) |