import functools import os import sys import traceback import matplotlib as mpl from matplotlib import _api, backend_tools, cbook from matplotlib._pylab_helpers import Gcf from matplotlib.backend_bases import ( _Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2, TimerBase, cursors, ToolContainerBase, MouseButton, CloseEvent, KeyEvent, LocationEvent, MouseEvent, ResizeEvent) import matplotlib.backends.qt_editor.figureoptions as figureoptions from . import qt_compat from .qt_compat import ( QtCore, QtGui, QtWidgets, __version__, QT_API, _to_int, _isdeleted, _maybe_allow_interrupt ) # SPECIAL_KEYS are Qt::Key that do *not* return their Unicode name # instead they have manually specified names. SPECIAL_KEYS = { _to_int(getattr(QtCore.Qt.Key, k)): v for k, v in [ ("Key_Escape", "escape"), ("Key_Tab", "tab"), ("Key_Backspace", "backspace"), ("Key_Return", "enter"), ("Key_Enter", "enter"), ("Key_Insert", "insert"), ("Key_Delete", "delete"), ("Key_Pause", "pause"), ("Key_SysReq", "sysreq"), ("Key_Clear", "clear"), ("Key_Home", "home"), ("Key_End", "end"), ("Key_Left", "left"), ("Key_Up", "up"), ("Key_Right", "right"), ("Key_Down", "down"), ("Key_PageUp", "pageup"), ("Key_PageDown", "pagedown"), ("Key_Shift", "shift"), # In OSX, the control and super (aka cmd/apple) keys are switched. ("Key_Control", "control" if sys.platform != "darwin" else "cmd"), ("Key_Meta", "meta" if sys.platform != "darwin" else "control"), ("Key_Alt", "alt"), ("Key_CapsLock", "caps_lock"), ("Key_F1", "f1"), ("Key_F2", "f2"), ("Key_F3", "f3"), ("Key_F4", "f4"), ("Key_F5", "f5"), ("Key_F6", "f6"), ("Key_F7", "f7"), ("Key_F8", "f8"), ("Key_F9", "f9"), ("Key_F10", "f10"), ("Key_F10", "f11"), ("Key_F12", "f12"), ("Key_Super_L", "super"), ("Key_Super_R", "super"), ] } # Define which modifier keys are collected on keyboard events. # Elements are (Qt::KeyboardModifiers, Qt::Key) tuples. # Order determines the modifier order (ctrl+alt+...) reported by Matplotlib. _MODIFIER_KEYS = [ (_to_int(getattr(QtCore.Qt.KeyboardModifier, mod)), _to_int(getattr(QtCore.Qt.Key, key))) for mod, key in [ ("ControlModifier", "Key_Control"), ("AltModifier", "Key_Alt"), ("ShiftModifier", "Key_Shift"), ("MetaModifier", "Key_Meta"), ] ] cursord = { k: getattr(QtCore.Qt.CursorShape, v) for k, v in [ (cursors.MOVE, "SizeAllCursor"), (cursors.HAND, "PointingHandCursor"), (cursors.POINTER, "ArrowCursor"), (cursors.SELECT_REGION, "CrossCursor"), (cursors.WAIT, "WaitCursor"), (cursors.RESIZE_HORIZONTAL, "SizeHorCursor"), (cursors.RESIZE_VERTICAL, "SizeVerCursor"), ] } # lru_cache keeps a reference to the QApplication instance, keeping it from # being GC'd. @functools.lru_cache(1) def _create_qApp(): app = QtWidgets.QApplication.instance() # Create a new QApplication and configure it if none exists yet, as only # one QApplication can exist at a time. if app is None: # display_is_valid returns False only if on Linux and neither X11 # nor Wayland display can be opened. if not mpl._c_internal_utils.display_is_valid(): raise RuntimeError('Invalid DISPLAY variable') # Check to make sure a QApplication from a different major version # of Qt is not instantiated in the process if QT_API in {'PyQt6', 'PySide6'}: other_bindings = ('PyQt5', 'PySide2') qt_version = 6 elif QT_API in {'PyQt5', 'PySide2'}: other_bindings = ('PyQt6', 'PySide6') qt_version = 5 else: raise RuntimeError("Should never be here") for binding in other_bindings: mod = sys.modules.get(f'{binding}.QtWidgets') if mod is not None and mod.QApplication.instance() is not None: other_core = sys.modules.get(f'{binding}.QtCore') _api.warn_external( f'Matplotlib is using {QT_API} which wraps ' f'{QtCore.qVersion()} however an instantiated ' f'QApplication from {binding} which wraps ' f'{other_core.qVersion()} exists. Mixing Qt major ' 'versions may not work as expected.' ) break if qt_version == 5: try: QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling) except AttributeError: # Only for Qt>=5.6, <6. pass try: QtWidgets.QApplication.setHighDpiScaleFactorRoundingPolicy( QtCore.Qt.HighDpiScaleFactorRoundingPolicy.PassThrough) except AttributeError: # Only for Qt>=5.14. pass app = QtWidgets.QApplication(["matplotlib"]) if sys.platform == "darwin": image = str(cbook._get_data_path('images/matplotlib.svg')) icon = QtGui.QIcon(image) app.setWindowIcon(icon) app.setQuitOnLastWindowClosed(True) cbook._setup_new_guiapp() if qt_version == 5: app.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps) return app class TimerQT(TimerBase): """Subclass of `.TimerBase` using QTimer events.""" def __init__(self, *args, **kwargs): # Create a new timer and connect the timeout() signal to the # _on_timer method. self._timer = QtCore.QTimer() self._timer.timeout.connect(self._on_timer) super().__init__(*args, **kwargs) def __del__(self): # The check for deletedness is needed to avoid an error at animation # shutdown with PySide2. if not _isdeleted(self._timer): self._timer_stop() def _timer_set_single_shot(self): self._timer.setSingleShot(self._single) def _timer_set_interval(self): self._timer.setInterval(self._interval) def _timer_start(self): self._timer.start() def _timer_stop(self): self._timer.stop() class FigureCanvasQT(FigureCanvasBase, QtWidgets.QWidget): required_interactive_framework = "qt" _timer_cls = TimerQT manager_class = _api.classproperty(lambda cls: FigureManagerQT) buttond = { getattr(QtCore.Qt.MouseButton, k): v for k, v in [ ("LeftButton", MouseButton.LEFT), ("RightButton", MouseButton.RIGHT), ("MiddleButton", MouseButton.MIDDLE), ("XButton1", MouseButton.BACK), ("XButton2", MouseButton.FORWARD), ] } def __init__(self, figure=None): _create_qApp() super().__init__(figure=figure) self._draw_pending = False self._is_drawing = False self._draw_rect_callback = lambda painter: None self._in_resize_event = False self.setAttribute(QtCore.Qt.WidgetAttribute.WA_OpaquePaintEvent) self.setMouseTracking(True) self.resize(*self.get_width_height()) palette = QtGui.QPalette(QtGui.QColor("white")) self.setPalette(palette) def _update_pixel_ratio(self): if self._set_device_pixel_ratio( self.devicePixelRatioF() or 1): # rarely, devicePixelRatioF=0 # The easiest way to resize the canvas is to emit a resizeEvent # since we implement all the logic for resizing the canvas for # that event. event = QtGui.QResizeEvent(self.size(), self.size()) self.resizeEvent(event) def _update_screen(self, screen): # Handler for changes to a window's attached screen. self._update_pixel_ratio() if screen is not None: screen.physicalDotsPerInchChanged.connect(self._update_pixel_ratio) screen.logicalDotsPerInchChanged.connect(self._update_pixel_ratio) def showEvent(self, event): # Set up correct pixel ratio, and connect to any signal changes for it, # once the window is shown (and thus has these attributes). window = self.window().windowHandle() window.screenChanged.connect(self._update_screen) self._update_screen(window.screen()) def set_cursor(self, cursor): # docstring inherited self.setCursor(_api.check_getitem(cursord, cursor=cursor)) def mouseEventCoords(self, pos=None): """ Calculate mouse coordinates in physical pixels. Qt uses logical pixels, but the figure is scaled to physical pixels for rendering. Transform to physical pixels so that all of the down-stream transforms work as expected. Also, the origin is different and needs to be corrected. """ if pos is None: pos = self.mapFromGlobal(QtGui.QCursor.pos()) elif hasattr(pos, "position"): # qt6 QtGui.QEvent pos = pos.position() elif hasattr(pos, "pos"): # qt5 QtCore.QEvent pos = pos.pos() # (otherwise, it's already a QPoint) x = pos.x() # flip y so y=0 is bottom of canvas y = self.figure.bbox.height / self.device_pixel_ratio - pos.y() return x * self.device_pixel_ratio, y * self.device_pixel_ratio def enterEvent(self, event): # Force querying of the modifiers, as the cached modifier state can # have been invalidated while the window was out of focus. mods = QtWidgets.QApplication.instance().queryKeyboardModifiers() LocationEvent("figure_enter_event", self, *self.mouseEventCoords(event), modifiers=self._mpl_modifiers(mods), guiEvent=event)._process() def leaveEvent(self, event): QtWidgets.QApplication.restoreOverrideCursor() LocationEvent("figure_leave_event", self, *self.mouseEventCoords(), modifiers=self._mpl_modifiers(), guiEvent=event)._process() def mousePressEvent(self, event): button = self.buttond.get(event.button()) if button is not None: MouseEvent("button_press_event", self, *self.mouseEventCoords(event), button, modifiers=self._mpl_modifiers(), guiEvent=event)._process() def mouseDoubleClickEvent(self, event): button = self.buttond.get(event.button()) if button is not None: MouseEvent("button_press_event", self, *self.mouseEventCoords(event), button, dblclick=True, modifiers=self._mpl_modifiers(), guiEvent=event)._process() def mouseMoveEvent(self, event): MouseEvent("motion_notify_event", self, *self.mouseEventCoords(event), modifiers=self._mpl_modifiers(), guiEvent=event)._process() def mouseReleaseEvent(self, event): button = self.buttond.get(event.button()) if button is not None: MouseEvent("button_release_event", self, *self.mouseEventCoords(event), button, modifiers=self._mpl_modifiers(), guiEvent=event)._process() def wheelEvent(self, event): # from QWheelEvent::pixelDelta doc: pixelDelta is sometimes not # provided (`isNull()`) and is unreliable on X11 ("xcb"). if (event.pixelDelta().isNull() or QtWidgets.QApplication.instance().platformName() == "xcb"): steps = event.angleDelta().y() / 120 else: steps = event.pixelDelta().y() if steps: MouseEvent("scroll_event", self, *self.mouseEventCoords(event), step=steps, modifiers=self._mpl_modifiers(), guiEvent=event)._process() def keyPressEvent(self, event): key = self._get_key(event) if key is not None: KeyEvent("key_press_event", self, key, *self.mouseEventCoords(), guiEvent=event)._process() def keyReleaseEvent(self, event): key = self._get_key(event) if key is not None: KeyEvent("key_release_event", self, key, *self.mouseEventCoords(), guiEvent=event)._process() def resizeEvent(self, event): if self._in_resize_event: # Prevent PyQt6 recursion return self._in_resize_event = True try: w = event.size().width() * self.device_pixel_ratio h = event.size().height() * self.device_pixel_ratio dpival = self.figure.dpi winch = w / dpival hinch = h / dpival self.figure.set_size_inches(winch, hinch, forward=False) # pass back into Qt to let it finish QtWidgets.QWidget.resizeEvent(self, event) # emit our resize events ResizeEvent("resize_event", self)._process() self.draw_idle() finally: self._in_resize_event = False def sizeHint(self): w, h = self.get_width_height() return QtCore.QSize(w, h) def minumumSizeHint(self): return QtCore.QSize(10, 10) @staticmethod def _mpl_modifiers(modifiers=None, *, exclude=None): if modifiers is None: modifiers = QtWidgets.QApplication.instance().keyboardModifiers() modifiers = _to_int(modifiers) # get names of the pressed modifier keys # 'control' is named 'control' when a standalone key, but 'ctrl' when a # modifier # bit twiddling to pick out modifier keys from modifiers bitmask, # if exclude is a MODIFIER, it should not be duplicated in mods return [SPECIAL_KEYS[key].replace('control', 'ctrl') for mask, key in _MODIFIER_KEYS if exclude != key and modifiers & mask] def _get_key(self, event): event_key = event.key() mods = self._mpl_modifiers(exclude=event_key) try: # for certain keys (enter, left, backspace, etc) use a word for the # key, rather than Unicode key = SPECIAL_KEYS[event_key] except KeyError: # Unicode defines code points up to 0x10ffff (sys.maxunicode) # QT will use Key_Codes larger than that for keyboard keys that are # not Unicode characters (like multimedia keys) # skip these # if you really want them, you should add them to SPECIAL_KEYS if event_key > sys.maxunicode: return None key = chr(event_key) # qt delivers capitalized letters. fix capitalization # note that capslock is ignored if 'shift' in mods: mods.remove('shift') else: key = key.lower() return '+'.join(mods + [key]) def flush_events(self): # docstring inherited QtWidgets.QApplication.instance().processEvents() def start_event_loop(self, timeout=0): # docstring inherited if hasattr(self, "_event_loop") and self._event_loop.isRunning(): raise RuntimeError("Event loop already running") self._event_loop = event_loop = QtCore.QEventLoop() if timeout > 0: _ = QtCore.QTimer.singleShot(int(timeout * 1000), event_loop.quit) with _maybe_allow_interrupt(event_loop): qt_compat._exec(event_loop) def stop_event_loop(self, event=None): # docstring inherited if hasattr(self, "_event_loop"): self._event_loop.quit() def draw(self): """Render the figure, and queue a request for a Qt draw.""" # The renderer draw is done here; delaying causes problems with code # that uses the result of the draw() to update plot elements. if self._is_drawing: return with cbook._setattr_cm(self, _is_drawing=True): super().draw() self.update() def draw_idle(self): """Queue redraw of the Agg buffer and request Qt paintEvent.""" # The Agg draw needs to be handled by the same thread Matplotlib # modifies the scene graph from. Post Agg draw request to the # current event loop in order to ensure thread affinity and to # accumulate multiple draw requests from event handling. # TODO: queued signal connection might be safer than singleShot if not (getattr(self, '_draw_pending', False) or getattr(self, '_is_drawing', False)): self._draw_pending = True QtCore.QTimer.singleShot(0, self._draw_idle) def blit(self, bbox=None): # docstring inherited if bbox is None and self.figure: bbox = self.figure.bbox # Blit the entire canvas if bbox is None. # repaint uses logical pixels, not physical pixels like the renderer. l, b, w, h = [int(pt / self.device_pixel_ratio) for pt in bbox.bounds] t = b + h self.repaint(l, self.rect().height() - t, w, h) def _draw_idle(self): with self._idle_draw_cntx(): if not self._draw_pending: return self._draw_pending = False if self.height() < 0 or self.width() < 0: return try: self.draw() except Exception: # Uncaught exceptions are fatal for PyQt5, so catch them. traceback.print_exc() def drawRectangle(self, rect): # Draw the zoom rectangle to the QPainter. _draw_rect_callback needs # to be called at the end of paintEvent. if rect is not None: x0, y0, w, h = [int(pt / self.device_pixel_ratio) for pt in rect] x1 = x0 + w y1 = y0 + h def _draw_rect_callback(painter): pen = QtGui.QPen( QtGui.QColor("black"), 1 / self.device_pixel_ratio ) pen.setDashPattern([3, 3]) for color, offset in [ (QtGui.QColor("black"), 0), (QtGui.QColor("white"), 3), ]: pen.setDashOffset(offset) pen.setColor(color) painter.setPen(pen) # Draw the lines from x0, y0 towards x1, y1 so that the # dashes don't "jump" when moving the zoom box. painter.drawLine(x0, y0, x0, y1) painter.drawLine(x0, y0, x1, y0) painter.drawLine(x0, y1, x1, y1) painter.drawLine(x1, y0, x1, y1) else: def _draw_rect_callback(painter): return self._draw_rect_callback = _draw_rect_callback self.update() class MainWindow(QtWidgets.QMainWindow): closing = QtCore.Signal() def closeEvent(self, event): self.closing.emit() super().closeEvent(event) class FigureManagerQT(FigureManagerBase): """ Attributes ---------- canvas : `FigureCanvas` The FigureCanvas instance num : int or str The Figure number toolbar : qt.QToolBar The qt.QToolBar window : qt.QMainWindow The qt.QMainWindow """ def __init__(self, canvas, num): self.window = MainWindow() super().__init__(canvas, num) self.window.closing.connect(self._widgetclosed) if sys.platform != "darwin": image = str(cbook._get_data_path('images/matplotlib.svg')) icon = QtGui.QIcon(image) self.window.setWindowIcon(icon) self.window._destroying = False if self.toolbar: self.window.addToolBar(self.toolbar) tbs_height = self.toolbar.sizeHint().height() else: tbs_height = 0 # resize the main window so it will display the canvas with the # requested size: cs = canvas.sizeHint() cs_height = cs.height() height = cs_height + tbs_height self.window.resize(cs.width(), height) self.window.setCentralWidget(self.canvas) if mpl.is_interactive(): self.window.show() self.canvas.draw_idle() # Give the keyboard focus to the figure instead of the manager: # StrongFocus accepts both tab and click to focus and will enable the # canvas to process event without clicking. # https://doc.qt.io/qt-5/qt.html#FocusPolicy-enum self.canvas.setFocusPolicy(QtCore.Qt.FocusPolicy.StrongFocus) self.canvas.setFocus() self.window.raise_() def full_screen_toggle(self): if self.window.isFullScreen(): self.window.showNormal() else: self.window.showFullScreen() def _widgetclosed(self): CloseEvent("close_event", self.canvas)._process() if self.window._destroying: return self.window._destroying = True try: Gcf.destroy(self) except AttributeError: pass # It seems that when the python session is killed, # Gcf can get destroyed before the Gcf.destroy # line is run, leading to a useless AttributeError. def resize(self, width, height): # The Qt methods return sizes in 'virtual' pixels so we do need to # rescale from physical to logical pixels. width = int(width / self.canvas.device_pixel_ratio) height = int(height / self.canvas.device_pixel_ratio) extra_width = self.window.width() - self.canvas.width() extra_height = self.window.height() - self.canvas.height() self.canvas.resize(width, height) self.window.resize(width + extra_width, height + extra_height) @classmethod def start_main_loop(cls): qapp = QtWidgets.QApplication.instance() if qapp: with _maybe_allow_interrupt(qapp): qt_compat._exec(qapp) def show(self): self.window.show() if mpl.rcParams['figure.raise_window']: self.window.activateWindow() self.window.raise_() def destroy(self, *args): # check for qApp first, as PySide deletes it in its atexit handler if QtWidgets.QApplication.instance() is None: return if self.window._destroying: return self.window._destroying = True if self.toolbar: self.toolbar.destroy() self.window.close() def get_window_title(self): return self.window.windowTitle() def set_window_title(self, title): self.window.setWindowTitle(title) class NavigationToolbar2QT(NavigationToolbar2, QtWidgets.QToolBar): _message = QtCore.Signal(str) # Remove once deprecation below elapses. message = _api.deprecate_privatize_attribute("3.8") toolitems = [*NavigationToolbar2.toolitems] toolitems.insert( # Add 'customize' action after 'subplots' [name for name, *_ in toolitems].index("Subplots") + 1, ("Customize", "Edit axis, curve and image parameters", "qt4_editor_options", "edit_parameters")) def __init__(self, canvas, parent=None, coordinates=True): """coordinates: should we show the coordinates on the right?""" QtWidgets.QToolBar.__init__(self, parent) self.setAllowedAreas(QtCore.Qt.ToolBarArea( _to_int(QtCore.Qt.ToolBarArea.TopToolBarArea) | _to_int(QtCore.Qt.ToolBarArea.BottomToolBarArea))) self.coordinates = coordinates self._actions = {} # mapping of toolitem method names to QActions. self._subplot_dialog = None for text, tooltip_text, image_file, callback in self.toolitems: if text is None: self.addSeparator() else: a = self.addAction(self._icon(image_file + '.png'), text, getattr(self, callback)) self._actions[callback] = a if callback in ['zoom', 'pan']: a.setCheckable(True) if tooltip_text is not None: a.setToolTip(tooltip_text) # Add the (x, y) location widget at the right side of the toolbar # The stretch factor is 1 which means any resizing of the toolbar # will resize this label instead of the buttons. if self.coordinates: self.locLabel = QtWidgets.QLabel("", self) self.locLabel.setAlignment(QtCore.Qt.AlignmentFlag( _to_int(QtCore.Qt.AlignmentFlag.AlignRight) | _to_int(QtCore.Qt.AlignmentFlag.AlignVCenter))) self.locLabel.setSizePolicy(QtWidgets.QSizePolicy( QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Ignored, )) labelAction = self.addWidget(self.locLabel) labelAction.setVisible(True) NavigationToolbar2.__init__(self, canvas) def _icon(self, name): """ Construct a `.QIcon` from an image file *name*, including the extension and relative to Matplotlib's "images" data directory. """ # use a high-resolution icon with suffix '_large' if available # note: user-provided icons may not have '_large' versions path_regular = cbook._get_data_path('images', name) path_large = path_regular.with_name( path_regular.name.replace('.png', '_large.png')) filename = str(path_large if path_large.exists() else path_regular) pm = QtGui.QPixmap(filename) pm.setDevicePixelRatio( self.devicePixelRatioF() or 1) # rarely, devicePixelRatioF=0 if self.palette().color(self.backgroundRole()).value() < 128: icon_color = self.palette().color(self.foregroundRole()) mask = pm.createMaskFromColor( QtGui.QColor('black'), QtCore.Qt.MaskMode.MaskOutColor) pm.fill(icon_color) pm.setMask(mask) return QtGui.QIcon(pm) def edit_parameters(self): axes = self.canvas.figure.get_axes() if not axes: QtWidgets.QMessageBox.warning( self.canvas.parent(), "Error", "There are no axes to edit.") return elif len(axes) == 1: ax, = axes else: titles = [ ax.get_label() or ax.get_title() or ax.get_title("left") or ax.get_title("right") or " - ".join(filter(None, [ax.get_xlabel(), ax.get_ylabel()])) or f"" for ax in axes] duplicate_titles = [ title for title in titles if titles.count(title) > 1] for i, ax in enumerate(axes): if titles[i] in duplicate_titles: titles[i] += f" (id: {id(ax):#x})" # Deduplicate titles. item, ok = QtWidgets.QInputDialog.getItem( self.canvas.parent(), 'Customize', 'Select axes:', titles, 0, False) if not ok: return ax = axes[titles.index(item)] figureoptions.figure_edit(ax, self) def _update_buttons_checked(self): # sync button checkstates to match active mode if 'pan' in self._actions: self._actions['pan'].setChecked(self.mode.name == 'PAN') if 'zoom' in self._actions: self._actions['zoom'].setChecked(self.mode.name == 'ZOOM') def pan(self, *args): super().pan(*args) self._update_buttons_checked() def zoom(self, *args): super().zoom(*args) self._update_buttons_checked() def set_message(self, s): self._message.emit(s) if self.coordinates: self.locLabel.setText(s) def draw_rubberband(self, event, x0, y0, x1, y1): height = self.canvas.figure.bbox.height y1 = height - y1 y0 = height - y0 rect = [int(val) for val in (x0, y0, x1 - x0, y1 - y0)] self.canvas.drawRectangle(rect) def remove_rubberband(self): self.canvas.drawRectangle(None) def configure_subplots(self): if self._subplot_dialog is None: self._subplot_dialog = SubplotToolQt( self.canvas.figure, self.canvas.parent()) self.canvas.mpl_connect( "close_event", lambda e: self._subplot_dialog.reject()) self._subplot_dialog.update_from_current_subplotpars() self._subplot_dialog.show() return self._subplot_dialog def save_figure(self, *args): filetypes = self.canvas.get_supported_filetypes_grouped() sorted_filetypes = sorted(filetypes.items()) default_filetype = self.canvas.get_default_filetype() startpath = os.path.expanduser(mpl.rcParams['savefig.directory']) start = os.path.join(startpath, self.canvas.get_default_filename()) filters = [] selectedFilter = None for name, exts in sorted_filetypes: exts_list = " ".join(['*.%s' % ext for ext in exts]) filter = f'{name} ({exts_list})' if default_filetype in exts: selectedFilter = filter filters.append(filter) filters = ';;'.join(filters) fname, filter = QtWidgets.QFileDialog.getSaveFileName( self.canvas.parent(), "Choose a filename to save to", start, filters, selectedFilter) if fname: # Save dir for next time, unless empty str (i.e., use cwd). if startpath != "": mpl.rcParams['savefig.directory'] = os.path.dirname(fname) try: self.canvas.figure.savefig(fname) except Exception as e: QtWidgets.QMessageBox.critical( self, "Error saving file", str(e), QtWidgets.QMessageBox.StandardButton.Ok, QtWidgets.QMessageBox.StandardButton.NoButton) def set_history_buttons(self): can_backward = self._nav_stack._pos > 0 can_forward = self._nav_stack._pos < len(self._nav_stack) - 1 if 'back' in self._actions: self._actions['back'].setEnabled(can_backward) if 'forward' in self._actions: self._actions['forward'].setEnabled(can_forward) class SubplotToolQt(QtWidgets.QDialog): def __init__(self, targetfig, parent): super().__init__() self.setWindowIcon(QtGui.QIcon( str(cbook._get_data_path("images/matplotlib.png")))) self.setObjectName("SubplotTool") self._spinboxes = {} main_layout = QtWidgets.QHBoxLayout() self.setLayout(main_layout) for group, spinboxes, buttons in [ ("Borders", ["top", "bottom", "left", "right"], [("Export values", self._export_values)]), ("Spacings", ["hspace", "wspace"], [("Tight layout", self._tight_layout), ("Reset", self._reset), ("Close", self.close)])]: layout = QtWidgets.QVBoxLayout() main_layout.addLayout(layout) box = QtWidgets.QGroupBox(group) layout.addWidget(box) inner = QtWidgets.QFormLayout(box) for name in spinboxes: self._spinboxes[name] = spinbox = QtWidgets.QDoubleSpinBox() spinbox.setRange(0, 1) spinbox.setDecimals(3) spinbox.setSingleStep(0.005) spinbox.setKeyboardTracking(False) spinbox.valueChanged.connect(self._on_value_changed) inner.addRow(name, spinbox) layout.addStretch(1) for name, method in buttons: button = QtWidgets.QPushButton(name) # Don't trigger on , which is used to input values. button.setAutoDefault(False) button.clicked.connect(method) layout.addWidget(button) if name == "Close": button.setFocus() self._figure = targetfig self._defaults = {} self._export_values_dialog = None self.update_from_current_subplotpars() def update_from_current_subplotpars(self): self._defaults = {spinbox: getattr(self._figure.subplotpars, name) for name, spinbox in self._spinboxes.items()} self._reset() # Set spinbox current values without triggering signals. def _export_values(self): # Explicitly round to 3 decimals (which is also the spinbox precision) # to avoid numbers of the form 0.100...001. self._export_values_dialog = QtWidgets.QDialog() layout = QtWidgets.QVBoxLayout() self._export_values_dialog.setLayout(layout) text = QtWidgets.QPlainTextEdit() text.setReadOnly(True) layout.addWidget(text) text.setPlainText( ",\n".join(f"{attr}={spinbox.value():.3}" for attr, spinbox in self._spinboxes.items())) # Adjust the height of the text widget to fit the whole text, plus # some padding. size = text.maximumSize() size.setHeight( QtGui.QFontMetrics(text.document().defaultFont()) .size(0, text.toPlainText()).height() + 20) text.setMaximumSize(size) self._export_values_dialog.show() def _on_value_changed(self): spinboxes = self._spinboxes # Set all mins and maxes, so that this can also be used in _reset(). for lower, higher in [("bottom", "top"), ("left", "right")]: spinboxes[higher].setMinimum(spinboxes[lower].value() + .001) spinboxes[lower].setMaximum(spinboxes[higher].value() - .001) self._figure.subplots_adjust( **{attr: spinbox.value() for attr, spinbox in spinboxes.items()}) self._figure.canvas.draw_idle() def _tight_layout(self): self._figure.tight_layout() for attr, spinbox in self._spinboxes.items(): spinbox.blockSignals(True) spinbox.setValue(getattr(self._figure.subplotpars, attr)) spinbox.blockSignals(False) self._figure.canvas.draw_idle() def _reset(self): for spinbox, value in self._defaults.items(): spinbox.setRange(0, 1) spinbox.blockSignals(True) spinbox.setValue(value) spinbox.blockSignals(False) self._on_value_changed() class ToolbarQt(ToolContainerBase, QtWidgets.QToolBar): def __init__(self, toolmanager, parent=None): ToolContainerBase.__init__(self, toolmanager) QtWidgets.QToolBar.__init__(self, parent) self.setAllowedAreas(QtCore.Qt.ToolBarArea( _to_int(QtCore.Qt.ToolBarArea.TopToolBarArea) | _to_int(QtCore.Qt.ToolBarArea.BottomToolBarArea))) message_label = QtWidgets.QLabel("") message_label.setAlignment(QtCore.Qt.AlignmentFlag( _to_int(QtCore.Qt.AlignmentFlag.AlignRight) | _to_int(QtCore.Qt.AlignmentFlag.AlignVCenter))) message_label.setSizePolicy(QtWidgets.QSizePolicy( QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Ignored, )) self._message_action = self.addWidget(message_label) self._toolitems = {} self._groups = {} def add_toolitem( self, name, group, position, image_file, description, toggle): button = QtWidgets.QToolButton(self) if image_file: button.setIcon(NavigationToolbar2QT._icon(self, image_file)) button.setText(name) if description: button.setToolTip(description) def handler(): self.trigger_tool(name) if toggle: button.setCheckable(True) button.toggled.connect(handler) else: button.clicked.connect(handler) self._toolitems.setdefault(name, []) self._add_to_group(group, name, button, position) self._toolitems[name].append((button, handler)) def _add_to_group(self, group, name, button, position): gr = self._groups.get(group, []) if not gr: sep = self.insertSeparator(self._message_action) gr.append(sep) before = gr[position] widget = self.insertWidget(before, button) gr.insert(position, widget) self._groups[group] = gr def toggle_toolitem(self, name, toggled): if name not in self._toolitems: return for button, handler in self._toolitems[name]: button.toggled.disconnect(handler) button.setChecked(toggled) button.toggled.connect(handler) def remove_toolitem(self, name): for button, handler in self._toolitems[name]: button.setParent(None) del self._toolitems[name] def set_message(self, s): self.widgetForAction(self._message_action).setText(s) @backend_tools._register_tool_class(FigureCanvasQT) class ConfigureSubplotsQt(backend_tools.ConfigureSubplotsBase): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self._subplot_dialog = None def trigger(self, *args): NavigationToolbar2QT.configure_subplots(self) @backend_tools._register_tool_class(FigureCanvasQT) class SaveFigureQt(backend_tools.SaveFigureBase): def trigger(self, *args): NavigationToolbar2QT.save_figure( self._make_classic_style_pseudo_toolbar()) @backend_tools._register_tool_class(FigureCanvasQT) class RubberbandQt(backend_tools.RubberbandBase): def draw_rubberband(self, x0, y0, x1, y1): NavigationToolbar2QT.draw_rubberband( self._make_classic_style_pseudo_toolbar(), None, x0, y0, x1, y1) def remove_rubberband(self): NavigationToolbar2QT.remove_rubberband( self._make_classic_style_pseudo_toolbar()) @backend_tools._register_tool_class(FigureCanvasQT) class HelpQt(backend_tools.ToolHelpBase): def trigger(self, *args): QtWidgets.QMessageBox.information(None, "Help", self._get_help_html()) @backend_tools._register_tool_class(FigureCanvasQT) class ToolCopyToClipboardQT(backend_tools.ToolCopyToClipboardBase): def trigger(self, *args, **kwargs): pixmap = self.canvas.grab() QtWidgets.QApplication.instance().clipboard().setPixmap(pixmap) FigureManagerQT._toolbar2_class = NavigationToolbar2QT FigureManagerQT._toolmanager_toolbar_class = ToolbarQt @_Backend.export class _BackendQT(_Backend): backend_version = __version__ FigureCanvas = FigureCanvasQT FigureManager = FigureManagerQT mainloop = FigureManagerQT.start_main_loop