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Diffstat (limited to 'examples/multimedia/screencapture')
-rw-r--r-- | examples/multimedia/screencapture/doc/screencapture.rst | 42 | ||||
-rw-r--r-- | examples/multimedia/screencapture/doc/screencapture.webp | bin | 0 -> 53592 bytes | |||
-rw-r--r-- | examples/multimedia/screencapture/main.py | 20 | ||||
-rw-r--r-- | examples/multimedia/screencapture/screencapture.pyproject | 3 | ||||
-rw-r--r-- | examples/multimedia/screencapture/screencapturepreview.py | 162 | ||||
-rw-r--r-- | examples/multimedia/screencapture/screenlistmodel.py | 38 | ||||
-rw-r--r-- | examples/multimedia/screencapture/windowlistmodel.py | 30 |
7 files changed, 295 insertions, 0 deletions
diff --git a/examples/multimedia/screencapture/doc/screencapture.rst b/examples/multimedia/screencapture/doc/screencapture.rst new file mode 100644 index 000000000..116d7773b --- /dev/null +++ b/examples/multimedia/screencapture/doc/screencapture.rst @@ -0,0 +1,42 @@ +Screen Capture Example +====================== + +Screen Capture demonstrates how to capture a screen or window using +``QScreenCapture`` and ``QWindowCapture``. The example shows a list of screens +and windows and displays a live preview of the selected item using a +``QMediaCaptureSession`` and a ``QVideoWidget``. Capturing can be started and +stopped with a ``QPushButton``. + +Application Structure ++++++++++++++++++++++ + +The example consists of three custom classes. The UI and all screen capture +functionality is implemented in the class ``ScreenCapturePreview``. The classes +``ScreenListModel`` and ``WindowListModel`` only serve as models behind the two +``QListView`` widgets. The main function creates a ``ScreenCapturePreview`` +object, which in turn creates instances of ``QScreenCapture`` and +``QWindowCapture``, and a ``QMediaCaptureSession`` and ``QVideoWidget``, in +addition to all the UI widgets. + +The screen and window models are populated with the return values of +``QGuiApplication.screens()`` and ``QWindowCapture.capturableWindows()``, +respectively. + +When a list item is selected, it is connected to the ``QScreenCapture`` object +with ``QScreenCapture.setScreen()``, or to the ``QWindowCapture`` object with +``QWindowCapture.setWindow().`` The capture object is connected to the +``QMediaCaptureSession`` object with +``QMediaCaptureSession.setScreenCapture()`` and +``QMediaCaptureSession.setWindowCapture()``, respectively. The capture session +in turn is connected to the ``QVideoWidget`` object with +``QMediaCaptureSession.setVideoOutput()``. Thus, the capture output is +previewed in the video widget on the right hand side of the UI. + +The start/stop button calls ``QScreenCapture.start()`` and ``QScreenCapture.stop()``, +or ``QWindowCapture.start()`` and ``QWindowCapture.stop()``. + +A QMessageBox pops up if an ``errorOccurred`` signal is emitted. + +.. image. screencapture.webp + :width: 600 + :alt: screen capture example diff --git a/examples/multimedia/screencapture/doc/screencapture.webp b/examples/multimedia/screencapture/doc/screencapture.webp Binary files differnew file mode 100644 index 000000000..58ad36c7f --- /dev/null +++ b/examples/multimedia/screencapture/doc/screencapture.webp diff --git a/examples/multimedia/screencapture/main.py b/examples/multimedia/screencapture/main.py new file mode 100644 index 000000000..f445bac03 --- /dev/null +++ b/examples/multimedia/screencapture/main.py @@ -0,0 +1,20 @@ +# Copyright (C) 2023 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +"""PySide6 port of the QtMultiMedia Screen Capture Example from Qt v6.x""" + +import sys + +from PySide6.QtCore import QCoreApplication +from PySide6.QtWidgets import QApplication + +from screencapturepreview import ScreenCapturePreview + + +if __name__ == "__main__": + app = QApplication(sys.argv) + QCoreApplication.setApplicationName("screencapture") + QCoreApplication.setOrganizationName("QtProject") + screen_capture_preview = ScreenCapturePreview() + screen_capture_preview.show() + sys.exit(app.exec()) diff --git a/examples/multimedia/screencapture/screencapture.pyproject b/examples/multimedia/screencapture/screencapture.pyproject new file mode 100644 index 000000000..dfec6c901 --- /dev/null +++ b/examples/multimedia/screencapture/screencapture.pyproject @@ -0,0 +1,3 @@ +{ + "files": ["main.py", "screencapturepreview.py", "screenlistmodel.py", "windowlistmodel.py"] +} diff --git a/examples/multimedia/screencapture/screencapturepreview.py b/examples/multimedia/screencapture/screencapturepreview.py new file mode 100644 index 000000000..c7e0c596a --- /dev/null +++ b/examples/multimedia/screencapture/screencapturepreview.py @@ -0,0 +1,162 @@ +# Copyright (C) 2023 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +from enum import Enum, auto + +from PySide6.QtMultimediaWidgets import QVideoWidget +from PySide6.QtMultimedia import (QCapturableWindow, QMediaCaptureSession, + QScreenCapture, QWindowCapture) +from PySide6.QtWidgets import (QGridLayout, QLabel, QListView, + QMessageBox, QPushButton, QWidget) +from PySide6.QtGui import QAction, QGuiApplication +from PySide6.QtCore import QItemSelection, Qt, Slot + +from screenlistmodel import ScreenListModel +from windowlistmodel import WindowListModel + + +class SourceType(Enum): + Screen = auto() + Window = auto() + + +class ScreenCapturePreview(QWidget): + + def __init__(self, parent=None): + super().__init__(parent) + + self._source = SourceType.Screen + + self._screen_capture = QScreenCapture(self) + self._media_capture_session = QMediaCaptureSession(self) + self._video_widget = QVideoWidget(self) + self._screen_list_view = QListView(self) + self._screen_label = QLabel("Select screen to capture:", self) + self._video_widget_label = QLabel("Capture output:", self) + self._start_stop_button = QPushButton(self) + self._status_label = QLabel(self) + + self._screen_list_model = ScreenListModel(self) + + # Setup QScreenCapture with initial source: + self.setScreen(QGuiApplication.primaryScreen()) + self._screen_capture.start() + self._media_capture_session.setScreenCapture(self._screen_capture) + self._media_capture_session.setVideoOutput(self._video_widget) + + self._screen_list_view.setModel(self._screen_list_model) + + self._window_list_view = QListView(self) + self._window_capture = QWindowCapture(self) + self._media_capture_session.setWindowCapture(self._window_capture) + self._window_label = QLabel("Select window to capture:", self) + + self._window_list_model = WindowListModel(self) + self._window_list_view.setModel(self._window_list_model) + update_action = QAction("Update windows List", self) + update_action.triggered.connect(self._window_list_model.populate) + self._window_list_view.addAction(update_action) + self._window_list_view.setContextMenuPolicy(Qt.ActionsContextMenu) + + grid_layout = QGridLayout(self) + grid_layout.addWidget(self._screen_label, 0, 0) + grid_layout.addWidget(self._screen_list_view, 1, 0) + grid_layout.addWidget(self._start_stop_button, 4, 0) + grid_layout.addWidget(self._video_widget_label, 0, 1) + grid_layout.addWidget(self._video_widget, 1, 1, 4, 1) + grid_layout.addWidget(self._window_label, 2, 0) + grid_layout.addWidget(self._window_list_view, 3, 0) + grid_layout.addWidget(self._status_label, 5, 0, 1, 2) + + grid_layout.setColumnStretch(1, 1) + grid_layout.setRowStretch(1, 1) + grid_layout.setColumnMinimumWidth(0, 400) + grid_layout.setColumnMinimumWidth(1, 400) + grid_layout.setRowMinimumHeight(3, 1) + + selection_model = self._screen_list_view.selectionModel() + selection_model.selectionChanged.connect(self.on_current_screen_selection_changed) + selection_model = self._window_list_view.selectionModel() + selection_model.selectionChanged.connect(self.on_current_window_selection_changed) + + self._start_stop_button.clicked.connect(self.on_start_stop_button_clicked) + self._screen_capture.errorOccurred.connect(self.on_screen_capture_error_occured, + Qt.QueuedConnection) + self._window_capture.errorOccurred.connect(self.on_window_capture_error_occured, + Qt.QueuedConnection) + self.update_active(SourceType.Screen, True) + + @Slot(QItemSelection) + def on_current_screen_selection_changed(self, selection): + self.clear_error_string() + indexes = selection.indexes() + if indexes: + self._screen_capture.setScreen(self._screen_list_model.screen(indexes[0])) + self.update_active(SourceType.Screen, self.is_active()) + self._window_list_view.clearSelection() + else: + self._screen_capture.setScreen(None) + + @Slot(QItemSelection) + def on_current_window_selection_changed(self, selection): + self.clear_error_string() + indexes = selection.indexes() + if indexes: + window = self._window_list_model.window(indexes[0]) + if not window.isValid(): + m = "The window is no longer valid. Update the list of windows?" + answer = QMessageBox.question(self, "Invalid window", m) + if answer == QMessageBox.Yes: + self.update_active(SourceType.Window, False) + self._window_list_view.clearSelection() + self._window_list_model.populate() + return + self._window_capture.setWindow(window) + self.update_active(SourceType.Window, self.is_active()) + self._screen_list_view.clearSelection() + else: + self._window_capture.setWindow(QCapturableWindow()) + + @Slot(QWindowCapture.Error, str) + def on_window_capture_error_occured(self, error, error_string): + self.set_error_string("QWindowCapture: Error occurred " + error_string) + + @Slot(QScreenCapture.Error, str) + def on_screen_capture_error_occured(self, error, error_string): + self.set_error_string("QScreenCapture: Error occurred " + error_string) + + def set_error_string(self, t): + self._status_label.setStyleSheet("background-color: rgb(255, 0, 0);") + self._status_label.setText(t) + + def clear_error_string(self): + self._status_label.clear() + self._status_label.setStyleSheet("") + + @Slot() + def on_start_stop_button_clicked(self): + self.clear_error_string() + self.update_active(self._source_type, not self.is_active()) + + def update_start_stop_button_text(self): + active = self.is_active() + if self._source_type == SourceType.Window: + m = "Stop window capture" if active else "Start window capture" + self._start_stop_button.setText(m) + elif self._source_type == SourceType.Screen: + m = "Stop screen capture" if active else "Start screen capture" + self._start_stop_button.setText(m) + + def update_active(self, source_type, active): + self._source_type = source_type + self._screen_capture.setActive(active and source_type == SourceType.Screen) + self._window_capture.setActive(active and source_type == SourceType.Window) + + self.update_start_stop_button_text() + + def is_active(self): + if self._source_type == SourceType.Window: + return self._window_capture.isActive() + if self._source_type == SourceType.Screen: + return self._screen_capture.isActive() + return False diff --git a/examples/multimedia/screencapture/screenlistmodel.py b/examples/multimedia/screencapture/screenlistmodel.py new file mode 100644 index 000000000..72bb306e3 --- /dev/null +++ b/examples/multimedia/screencapture/screenlistmodel.py @@ -0,0 +1,38 @@ +# Copyright (C) 2023 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +from PySide6.QtGui import QGuiApplication +from PySide6.QtCore import QAbstractListModel, Qt, Slot + + +class ScreenListModel(QAbstractListModel): + + def __init__(self, parent=None): + super().__init__(parent) + app = qApp # noqa: F821 + app.screenAdded.connect(self.screens_changed) + app.screenRemoved.connect(self.screens_changed) + app.primaryScreenChanged.connect(self.screens_changed) + + def rowCount(self, index): + return len(QGuiApplication.screens()) + + def data(self, index, role): + screen_list = QGuiApplication.screens() + + if role == Qt.DisplayRole: + screen = screen_list[index.row()] + w = screen.size().width() + h = screen.size().height() + dpi = screen.logicalDotsPerInch() + return f'"{screen.name()}" {w}x{h}, {dpi}DPI' + + return None + + def screen(self, index): + return QGuiApplication.screens()[index.row()] + + @Slot() + def screens_changed(self): + self.beginResetModel() + self.endResetModel() diff --git a/examples/multimedia/screencapture/windowlistmodel.py b/examples/multimedia/screencapture/windowlistmodel.py new file mode 100644 index 000000000..079040ec2 --- /dev/null +++ b/examples/multimedia/screencapture/windowlistmodel.py @@ -0,0 +1,30 @@ +# Copyright (C) 2023 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +from PySide6.QtCore import QAbstractListModel, Qt, Slot +from PySide6.QtMultimedia import QWindowCapture + + +class WindowListModel(QAbstractListModel): + + def __init__(self, parent=None): + super().__init__(parent) + self._window_list = QWindowCapture.capturableWindows() + + def rowCount(self, QModelIndex): + return len(self._window_list) + + def data(self, index, role): + if role == Qt.DisplayRole: + window = self._window_list[index.row()] + return window.description() + return None + + def window(self, index): + return self._window_list[index.row()] + + @Slot() + def populate(self): + self.beginResetModel() + self._window_list = QWindowCapture.capturableWindows() + self.endResetModel() |