/
backend_qt5.py
1093 lines (914 loc) · 39 KB
/
backend_qt5.py
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import functools
import os
import re
import signal
import sys
import traceback
import matplotlib
from matplotlib import backend_tools, cbook
from matplotlib._pylab_helpers import Gcf
from matplotlib.backend_bases import (
_Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2,
TimerBase, cursors, ToolContainerBase, StatusbarBase, MouseButton)
import matplotlib.backends.qt_editor.figureoptions as figureoptions
from matplotlib.backends.qt_editor.formsubplottool import UiSubplotTool
from matplotlib.backend_managers import ToolManager
from .qt_compat import (
QtCore, QtGui, QtWidgets, _getSaveFileName, is_pyqt5, __version__, QT_API)
backend_version = __version__
# SPECIAL_KEYS are keys that do *not* return their unicode name
# instead they have manually specified names
SPECIAL_KEYS = {QtCore.Qt.Key_Control: 'control',
QtCore.Qt.Key_Shift: 'shift',
QtCore.Qt.Key_Alt: 'alt',
QtCore.Qt.Key_Meta: 'super',
QtCore.Qt.Key_Return: 'enter',
QtCore.Qt.Key_Left: 'left',
QtCore.Qt.Key_Up: 'up',
QtCore.Qt.Key_Right: 'right',
QtCore.Qt.Key_Down: 'down',
QtCore.Qt.Key_Escape: 'escape',
QtCore.Qt.Key_F1: 'f1',
QtCore.Qt.Key_F2: 'f2',
QtCore.Qt.Key_F3: 'f3',
QtCore.Qt.Key_F4: 'f4',
QtCore.Qt.Key_F5: 'f5',
QtCore.Qt.Key_F6: 'f6',
QtCore.Qt.Key_F7: 'f7',
QtCore.Qt.Key_F8: 'f8',
QtCore.Qt.Key_F9: 'f9',
QtCore.Qt.Key_F10: 'f10',
QtCore.Qt.Key_F11: 'f11',
QtCore.Qt.Key_F12: 'f12',
QtCore.Qt.Key_Home: 'home',
QtCore.Qt.Key_End: 'end',
QtCore.Qt.Key_PageUp: 'pageup',
QtCore.Qt.Key_PageDown: 'pagedown',
QtCore.Qt.Key_Tab: 'tab',
QtCore.Qt.Key_Backspace: 'backspace',
QtCore.Qt.Key_Enter: 'enter',
QtCore.Qt.Key_Insert: 'insert',
QtCore.Qt.Key_Delete: 'delete',
QtCore.Qt.Key_Pause: 'pause',
QtCore.Qt.Key_SysReq: 'sysreq',
QtCore.Qt.Key_Clear: 'clear', }
# define which modifier keys are collected on keyboard events.
# elements are (mpl names, Modifier Flag, Qt Key) tuples
SUPER = 0
ALT = 1
CTRL = 2
SHIFT = 3
MODIFIER_KEYS = [('super', QtCore.Qt.MetaModifier, QtCore.Qt.Key_Meta),
('alt', QtCore.Qt.AltModifier, QtCore.Qt.Key_Alt),
('ctrl', QtCore.Qt.ControlModifier, QtCore.Qt.Key_Control),
('shift', QtCore.Qt.ShiftModifier, QtCore.Qt.Key_Shift),
]
if sys.platform == 'darwin':
# in OSX, the control and super (aka cmd/apple) keys are switched, so
# switch them back.
SPECIAL_KEYS.update({QtCore.Qt.Key_Control: 'cmd', # cmd/apple key
QtCore.Qt.Key_Meta: 'control',
})
MODIFIER_KEYS[0] = ('cmd', QtCore.Qt.ControlModifier,
QtCore.Qt.Key_Control)
MODIFIER_KEYS[2] = ('ctrl', QtCore.Qt.MetaModifier,
QtCore.Qt.Key_Meta)
cursord = {
cursors.MOVE: QtCore.Qt.SizeAllCursor,
cursors.HAND: QtCore.Qt.PointingHandCursor,
cursors.POINTER: QtCore.Qt.ArrowCursor,
cursors.SELECT_REGION: QtCore.Qt.CrossCursor,
cursors.WAIT: QtCore.Qt.WaitCursor,
}
# make place holder
qApp = None
def _create_qApp():
"""
Only one qApp can exist at a time, so check before creating one.
"""
global qApp
if qApp is None:
app = QtWidgets.QApplication.instance()
if app is None:
# check for DISPLAY env variable on X11 build of Qt
if is_pyqt5():
try:
from PyQt5 import QtX11Extras
is_x11_build = True
except ImportError:
is_x11_build = False
else:
is_x11_build = hasattr(QtGui, "QX11Info")
if is_x11_build:
display = os.environ.get('DISPLAY')
if display is None or not re.search(r':\d', display):
raise RuntimeError('Invalid DISPLAY variable')
qApp = QtWidgets.QApplication([b"matplotlib"])
qApp.lastWindowClosed.connect(qApp.quit)
else:
qApp = app
if is_pyqt5():
try:
qApp.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps)
qApp.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
except AttributeError:
pass
def _allow_super_init(__init__):
"""
Decorator for ``__init__`` to allow ``super().__init__`` on PyQt4/PySide2.
"""
if QT_API == "PyQt5":
return __init__
else:
# To work around lack of cooperative inheritance in PyQt4, PySide,
# and PySide2, when calling FigureCanvasQT.__init__, we temporarily
# patch QWidget.__init__ by a cooperative version, that first calls
# QWidget.__init__ with no additional arguments, and then finds the
# next class in the MRO with an __init__ that does support cooperative
# inheritance (i.e., not defined by the PyQt4, PySide, PySide2, sip
# or Shiboken packages), and manually call its `__init__`, once again
# passing the additional arguments.
qwidget_init = QtWidgets.QWidget.__init__
def cooperative_qwidget_init(self, *args, **kwargs):
qwidget_init(self)
mro = type(self).__mro__
next_coop_init = next(
cls for cls in mro[mro.index(QtWidgets.QWidget) + 1:]
if cls.__module__.split(".")[0] not in [
"PyQt4", "sip", "PySide", "PySide2", "Shiboken"])
next_coop_init.__init__(self, *args, **kwargs)
@functools.wraps(__init__)
def wrapper(self, *args, **kwargs):
with cbook._setattr_cm(QtWidgets.QWidget,
__init__=cooperative_qwidget_init):
__init__(self, *args, **kwargs)
return wrapper
class TimerQT(TimerBase):
'''
Subclass of :class:`backend_bases.TimerBase` that uses Qt timer events.
Attributes
----------
interval : int
The time between timer events in milliseconds. Default is 1000 ms.
single_shot : bool
Boolean flag indicating whether this timer should
operate as single shot (run once and then stop). Defaults to False.
callbacks : list
Stores list of (func, args) tuples that will be called upon timer
events. This list can be manipulated directly, or the functions
`add_callback` and `remove_callback` can be used.
'''
def __init__(self, *args, **kwargs):
TimerBase.__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)
self._timer_set_interval()
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(QtWidgets.QWidget, FigureCanvasBase):
# map Qt button codes to MouseEvent's ones:
buttond = {QtCore.Qt.LeftButton: MouseButton.LEFT,
QtCore.Qt.MidButton: MouseButton.MIDDLE,
QtCore.Qt.RightButton: MouseButton.RIGHT,
QtCore.Qt.XButton1: MouseButton.BACK,
QtCore.Qt.XButton2: MouseButton.FORWARD,
}
@_allow_super_init
def __init__(self, figure):
_create_qApp()
super().__init__(figure=figure)
self.figure = figure
# We don't want to scale up the figure DPI more than once.
# Note, we don't handle a signal for changing DPI yet.
figure._original_dpi = figure.dpi
self._update_figure_dpi()
# In cases with mixed resolution displays, we need to be careful if the
# dpi_ratio changes - in this case we need to resize the canvas
# accordingly. We could watch for screenChanged events from Qt, but
# the issue is that we can't guarantee this will be emitted *before*
# the first paintEvent for the canvas, so instead we keep track of the
# dpi_ratio value here and in paintEvent we resize the canvas if
# needed.
self._dpi_ratio_prev = None
self._draw_pending = False
self._is_drawing = False
self._draw_rect_callback = lambda painter: None
self.setAttribute(QtCore.Qt.WA_OpaquePaintEvent)
self.setMouseTracking(True)
self.resize(*self.get_width_height())
# Key auto-repeat enabled by default
self._keyautorepeat = True
palette = QtGui.QPalette(QtCore.Qt.white)
self.setPalette(palette)
def _update_figure_dpi(self):
dpi = self._dpi_ratio * self.figure._original_dpi
self.figure._set_dpi(dpi, forward=False)
@property
def _dpi_ratio(self):
# Not available on Qt4 or some older Qt5.
try:
# self.devicePixelRatio() returns 0 in rare cases
return self.devicePixelRatio() or 1
except AttributeError:
return 1
def _update_dpi(self):
# As described in __init__ above, we need to be careful in cases with
# mixed resolution displays if dpi_ratio is changing between painting
# events.
# Return whether we triggered a resizeEvent (and thus a paintEvent)
# from within this function.
if self._dpi_ratio != self._dpi_ratio_prev:
# We need to update the figure DPI.
self._update_figure_dpi()
self._dpi_ratio_prev = self._dpi_ratio
# 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)
# resizeEvent triggers a paintEvent itself, so we exit this one
# (after making sure that the event is immediately handled).
return True
return False
def get_width_height(self):
w, h = FigureCanvasBase.get_width_height(self)
return int(w / self._dpi_ratio), int(h / self._dpi_ratio)
def enterEvent(self, event):
try:
x, y = self.mouseEventCoords(event.pos())
except AttributeError:
# the event from PyQt4 does not include the position
x = y = None
FigureCanvasBase.enter_notify_event(self, guiEvent=event, xy=(x, y))
def leaveEvent(self, event):
QtWidgets.QApplication.restoreOverrideCursor()
FigureCanvasBase.leave_notify_event(self, guiEvent=event)
def mouseEventCoords(self, pos):
"""Calculate mouse coordinates in physical pixels
Qt5 use 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.
"""
dpi_ratio = self._dpi_ratio
x = pos.x()
# flip y so y=0 is bottom of canvas
y = self.figure.bbox.height / dpi_ratio - pos.y()
return x * dpi_ratio, y * dpi_ratio
def mousePressEvent(self, event):
x, y = self.mouseEventCoords(event.pos())
button = self.buttond.get(event.button())
if button is not None:
FigureCanvasBase.button_press_event(self, x, y, button,
guiEvent=event)
def mouseDoubleClickEvent(self, event):
x, y = self.mouseEventCoords(event.pos())
button = self.buttond.get(event.button())
if button is not None:
FigureCanvasBase.button_press_event(self, x, y,
button, dblclick=True,
guiEvent=event)
def mouseMoveEvent(self, event):
x, y = self.mouseEventCoords(event)
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
def mouseReleaseEvent(self, event):
x, y = self.mouseEventCoords(event)
button = self.buttond.get(event.button())
if button is not None:
FigureCanvasBase.button_release_event(self, x, y, button,
guiEvent=event)
if is_pyqt5():
def wheelEvent(self, event):
x, y = self.mouseEventCoords(event)
# from QWheelEvent::delta doc
if event.pixelDelta().x() == 0 and event.pixelDelta().y() == 0:
steps = event.angleDelta().y() / 120
else:
steps = event.pixelDelta().y()
if steps:
FigureCanvasBase.scroll_event(
self, x, y, steps, guiEvent=event)
else:
def wheelEvent(self, event):
x = event.x()
# flipy so y=0 is bottom of canvas
y = self.figure.bbox.height - event.y()
# from QWheelEvent::delta doc
steps = event.delta() / 120
if event.orientation() == QtCore.Qt.Vertical:
FigureCanvasBase.scroll_event(
self, x, y, steps, guiEvent=event)
def keyPressEvent(self, event):
key = self._get_key(event)
if key is not None:
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
def keyReleaseEvent(self, event):
key = self._get_key(event)
if key is not None:
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
@cbook.deprecated("3.0", alternative="event.guiEvent.isAutoRepeat")
@property
def keyAutoRepeat(self):
"""
If True, enable auto-repeat for key events.
"""
return self._keyautorepeat
@keyAutoRepeat.setter
def keyAutoRepeat(self, val):
self._keyautorepeat = bool(val)
def resizeEvent(self, event):
# _dpi_ratio_prev will be set the first time the canvas is painted, and
# the rendered buffer is useless before anyways.
if self._dpi_ratio_prev is None:
return
w = event.size().width() * self._dpi_ratio
h = event.size().height() * self._dpi_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
FigureCanvasBase.resize_event(self)
def sizeHint(self):
w, h = self.get_width_height()
return QtCore.QSize(w, h)
def minumumSizeHint(self):
return QtCore.QSize(10, 10)
def _get_key(self, event):
if not self._keyautorepeat and event.isAutoRepeat():
return None
event_key = event.key()
event_mods = int(event.modifiers()) # actually a bitmask
# get names of the pressed modifier keys
# bit twiddling to pick out modifier keys from event_mods bitmask,
# if event_key is a MODIFIER, it should not be duplicated in mods
mods = [name for name, mod_key, qt_key in MODIFIER_KEYS
if event_key != qt_key and (event_mods & mod_key) == mod_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 0x0010ffff
# QT will use Key_Codes larger than that for keyboard keys that are
# are not unicode characters (like multimedia keys)
# skip these
# if you really want them, you should add them to SPECIAL_KEYS
MAX_UNICODE = 0x10ffff
if event_key > MAX_UNICODE:
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()
mods.reverse()
return '+'.join(mods + [key])
def new_timer(self, *args, **kwargs):
# docstring inherited
return TimerQT(*args, **kwargs)
def flush_events(self):
# docstring inherited
qApp.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:
timer = QtCore.QTimer.singleShot(timeout * 1000, event_loop.quit)
event_loop.exec_()
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 (self._draw_pending or self._is_drawing):
self._draw_pending = True
QtCore.QTimer.singleShot(0, self._draw_idle)
def _draw_idle(self):
if self.height() < 0 or self.width() < 0:
self._draw_pending = False
if not self._draw_pending:
return
try:
self.draw()
except Exception:
# Uncaught exceptions are fatal for PyQt5, so catch them instead.
traceback.print_exc()
finally:
self._draw_pending = False
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:
def _draw_rect_callback(painter):
pen = QtGui.QPen(QtCore.Qt.black, 1 / self._dpi_ratio,
QtCore.Qt.DotLine)
painter.setPen(pen)
painter.drawRect(*(pt / self._dpi_ratio for pt in rect))
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()
QtWidgets.QMainWindow.closeEvent(self, 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):
FigureManagerBase.__init__(self, canvas, num)
self.canvas = canvas
self.window = MainWindow()
self.window.closing.connect(canvas.close_event)
self.window.closing.connect(self._widgetclosed)
self.window.setWindowTitle("Figure %d" % num)
image = os.path.join(matplotlib.rcParams['datapath'],
'images', 'matplotlib.svg')
self.window.setWindowIcon(QtGui.QIcon(image))
# 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 w/o clicking.
# ClickFocus only takes the focus is the window has been
# clicked
# on. http://qt-project.org/doc/qt-4.8/qt.html#FocusPolicy-enum or
# http://doc.qt.digia.com/qt/qt.html#FocusPolicy-enum
self.canvas.setFocusPolicy(QtCore.Qt.StrongFocus)
self.canvas.setFocus()
self.window._destroying = False
self.toolmanager = self._get_toolmanager()
self.toolbar = self._get_toolbar(self.canvas, self.window)
self.statusbar = None
if self.toolmanager:
backend_tools.add_tools_to_manager(self.toolmanager)
if self.toolbar:
backend_tools.add_tools_to_container(self.toolbar)
self.statusbar = StatusbarQt(self.window, self.toolmanager)
if self.toolbar is not None:
self.window.addToolBar(self.toolbar)
if not self.toolmanager:
# add text label to status bar
statusbar_label = QtWidgets.QLabel()
self.window.statusBar().addWidget(statusbar_label)
self.toolbar.message.connect(statusbar_label.setText)
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()
sbs = self.window.statusBar().sizeHint()
height = cs.height() + tbs_height + sbs.height()
self.window.resize(cs.width(), height)
self.window.setCentralWidget(self.canvas)
if matplotlib.is_interactive():
self.window.show()
self.canvas.draw_idle()
self.window.raise_()
def full_screen_toggle(self):
if self.window.isFullScreen():
self.window.showNormal()
else:
self.window.showFullScreen()
def _widgetclosed(self):
if self.window._destroying:
return
self.window._destroying = True
try:
Gcf.destroy(self.num)
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 _get_toolbar(self, canvas, parent):
# must be inited after the window, drawingArea and figure
# attrs are set
if matplotlib.rcParams['toolbar'] == 'toolbar2':
toolbar = NavigationToolbar2QT(canvas, parent, False)
elif matplotlib.rcParams['toolbar'] == 'toolmanager':
toolbar = ToolbarQt(self.toolmanager, self.window)
else:
toolbar = None
return toolbar
def _get_toolmanager(self):
if matplotlib.rcParams['toolbar'] == 'toolmanager':
toolmanager = ToolManager(self.canvas.figure)
else:
toolmanager = None
return toolmanager
def resize(self, width, height):
# these are Qt methods so they return sizes in 'virtual' pixels
# so we do not need to worry about dpi scaling here.
extra_width = self.window.width() - self.canvas.width()
extra_height = self.window.height() - self.canvas.height()
self.window.resize(width+extra_width, height+extra_height)
def show(self):
self.window.show()
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)
def __init__(self, canvas, parent, coordinates=True):
""" coordinates: should we show the coordinates on the right? """
self.canvas = canvas
self.parent = parent
self.coordinates = coordinates
self._actions = {}
"""A mapping of toolitem method names to their QActions"""
QtWidgets.QToolBar.__init__(self, parent)
NavigationToolbar2.__init__(self, canvas)
def _icon(self, name):
if is_pyqt5():
name = name.replace('.png', '_large.png')
pm = QtGui.QPixmap(os.path.join(self.basedir, name))
if hasattr(pm, 'setDevicePixelRatio'):
pm.setDevicePixelRatio(self.canvas._dpi_ratio)
return QtGui.QIcon(pm)
def _init_toolbar(self):
self.basedir = os.path.join(matplotlib.rcParams['datapath'], 'images')
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)
if text == 'Subplots':
a = self.addAction(self._icon("qt4_editor_options.png"),
'Customize', self.edit_parameters)
a.setToolTip('Edit axis, curve and image parameters')
# 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.AlignRight | QtCore.Qt.AlignTop)
self.locLabel.setSizePolicy(
QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding,
QtWidgets.QSizePolicy.Ignored))
labelAction = self.addWidget(self.locLabel)
labelAction.setVisible(True)
# Esthetic adjustments - we need to set these explicitly in PyQt5
# otherwise the layout looks different - but we don't want to set it if
# not using HiDPI icons otherwise they look worse than before.
if is_pyqt5():
self.setIconSize(QtCore.QSize(24, 24))
self.layout().setSpacing(12)
@cbook.deprecated("3.1")
@property
def buttons(self):
return {}
@cbook.deprecated("3.1")
@property
def adj_window(self):
return None
if is_pyqt5():
# For some reason, self.setMinimumHeight doesn't seem to carry over to
# the actual sizeHint, so override it instead in order to make the
# aesthetic adjustments noted above.
def sizeHint(self):
size = super().sizeHint()
size.setHeight(max(48, size.height()))
return size
def edit_parameters(self):
axes = self.canvas.figure.get_axes()
if not axes:
QtWidgets.QMessageBox.warning(
self.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
" - ".join(filter(None, [ax.get_xlabel(), ax.get_ylabel()])) or
f"<anonymous {type(ax).__name__}>"
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.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
self._actions['pan'].setChecked(self._active == 'PAN')
self._actions['zoom'].setChecked(self._active == '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 set_cursor(self, cursor):
self.canvas.setCursor(cursord[cursor])
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):
image = os.path.join(matplotlib.rcParams['datapath'],
'images', 'matplotlib.png')
dia = SubplotToolQt(self.canvas.figure, self.canvas.parent())
dia.setWindowIcon(QtGui.QIcon(image))
dia.exec_()
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(
matplotlib.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 = '%s (%s)' % (name, exts_list)
if default_filetype in exts:
selectedFilter = filter
filters.append(filter)
filters = ';;'.join(filters)
fname, filter = _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 != "":
matplotlib.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.Ok, QtWidgets.QMessageBox.NoButton)
def set_history_buttons(self):
can_backward = self._nav_stack._pos > 0
can_forward = self._nav_stack._pos < len(self._nav_stack._elements) - 1
self._actions['back'].setEnabled(can_backward)
self._actions['forward'].setEnabled(can_forward)
class SubplotToolQt(UiSubplotTool):
def __init__(self, targetfig, parent):
UiSubplotTool.__init__(self, None)
self._figure = targetfig
for lower, higher in [("bottom", "top"), ("left", "right")]:
self._widgets[lower].valueChanged.connect(
lambda val: self._widgets[higher].setMinimum(val + .001))
self._widgets[higher].valueChanged.connect(
lambda val: self._widgets[lower].setMaximum(val - .001))
self._attrs = ["top", "bottom", "left", "right", "hspace", "wspace"]
self._defaults = {attr: vars(self._figure.subplotpars)[attr]
for attr in self._attrs}
# Set values after setting the range callbacks, but before setting up
# the redraw callbacks.
self._reset()
for attr in self._attrs:
self._widgets[attr].valueChanged.connect(self._on_value_changed)
for action, method in [("Export values", self._export_values),
("Tight layout", self._tight_layout),
("Reset", self._reset),
("Close", self.close)]:
self._widgets[action].clicked.connect(method)
def _export_values(self):
# Explicitly round to 3 decimals (which is also the spinbox precision)
# to avoid numbers of the form 0.100...001.
dialog = QtWidgets.QDialog()
layout = QtWidgets.QVBoxLayout()
dialog.setLayout(layout)
text = QtWidgets.QPlainTextEdit()
text.setReadOnly(True)
layout.addWidget(text)
text.setPlainText(
",\n".join("{}={:.3}".format(attr, self._widgets[attr].value())
for attr in self._attrs))
# 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)
dialog.exec_()
def _on_value_changed(self):
self._figure.subplots_adjust(**{attr: self._widgets[attr].value()
for attr in self._attrs})
self._figure.canvas.draw_idle()
def _tight_layout(self):
self._figure.tight_layout()
for attr in self._attrs:
widget = self._widgets[attr]
widget.blockSignals(True)
widget.setValue(vars(self._figure.subplotpars)[attr])
widget.blockSignals(False)
self._figure.canvas.draw_idle()
def _reset(self):
for attr, value in self._defaults.items():
self._widgets[attr].setValue(value)
class ToolbarQt(ToolContainerBase, QtWidgets.QToolBar):
def __init__(self, toolmanager, parent):
ToolContainerBase.__init__(self, toolmanager)
QtWidgets.QToolBar.__init__(self, parent)
self._toolitems = {}
self._groups = {}
@property
def _icon_extension(self):
if is_pyqt5():
return '_large.png'
return '.png'
def add_toolitem(
self, name, group, position, image_file, description, toggle):
button = QtWidgets.QToolButton(self)
button.setIcon(self._icon(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.addSeparator()
gr.append(sep)
before = gr[position]
widget = self.insertWidget(before, button)
gr.insert(position, widget)
self._groups[group] = gr
def _icon(self, name):
pm = QtGui.QPixmap(name)
if hasattr(pm, 'setDevicePixelRatio'):
pm.setDevicePixelRatio(self.toolmanager.canvas._dpi_ratio)
return QtGui.QIcon(pm)
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]
class StatusbarQt(StatusbarBase, QtWidgets.QLabel):
def __init__(self, window, *args, **kwargs):
StatusbarBase.__init__(self, *args, **kwargs)
QtWidgets.QLabel.__init__(self)
window.statusBar().addWidget(self)
def set_message(self, s):
self.setText(s)
class ConfigureSubplotsQt(backend_tools.ConfigureSubplotsBase):