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642 lines
23 KiB
Python
642 lines
23 KiB
Python
import functools
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import io
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import os
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import matplotlib as mpl
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from matplotlib import _api, backend_tools, cbook
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from matplotlib.backend_bases import (
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ToolContainerBase, MouseButton,
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KeyEvent, LocationEvent, MouseEvent, ResizeEvent, CloseEvent)
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try:
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import gi
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except ImportError as err:
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raise ImportError("The GTK4 backends require PyGObject") from err
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try:
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# :raises ValueError: If module/version is already loaded, already
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# required, or unavailable.
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gi.require_version("Gtk", "4.0")
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except ValueError as e:
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# in this case we want to re-raise as ImportError so the
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# auto-backend selection logic correctly skips.
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raise ImportError(e) from e
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from gi.repository import Gio, GLib, Gtk, Gdk, GdkPixbuf
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from . import _backend_gtk
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from ._backend_gtk import ( # noqa: F401 # pylint: disable=W0611
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_BackendGTK, _FigureCanvasGTK, _FigureManagerGTK, _NavigationToolbar2GTK,
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TimerGTK as TimerGTK4,
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)
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_GOBJECT_GE_3_47 = gi.version_info >= (3, 47, 0)
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_GTK_GE_4_12 = Gtk.check_version(4, 12, 0) is None
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class FigureCanvasGTK4(_FigureCanvasGTK, Gtk.DrawingArea):
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required_interactive_framework = "gtk4"
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supports_blit = False
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manager_class = _api.classproperty(lambda cls: FigureManagerGTK4)
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def __init__(self, figure=None):
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super().__init__(figure=figure)
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self.set_hexpand(True)
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self.set_vexpand(True)
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self._idle_draw_id = 0
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self._rubberband_rect = None
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self.set_draw_func(self._draw_func)
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self.connect('resize', self.resize_event)
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if _GTK_GE_4_12:
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self.connect('realize', self._realize_event)
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else:
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self.connect('notify::scale-factor', self._update_device_pixel_ratio)
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click = Gtk.GestureClick()
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click.set_button(0) # All buttons.
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click.connect('pressed', self.button_press_event)
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click.connect('released', self.button_release_event)
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self.add_controller(click)
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key = Gtk.EventControllerKey()
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key.connect('key-pressed', self.key_press_event)
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key.connect('key-released', self.key_release_event)
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self.add_controller(key)
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motion = Gtk.EventControllerMotion()
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motion.connect('motion', self.motion_notify_event)
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motion.connect('enter', self.enter_notify_event)
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motion.connect('leave', self.leave_notify_event)
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self.add_controller(motion)
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scroll = Gtk.EventControllerScroll.new(
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Gtk.EventControllerScrollFlags.VERTICAL)
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scroll.connect('scroll', self.scroll_event)
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self.add_controller(scroll)
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self.set_focusable(True)
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css = Gtk.CssProvider()
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style = '.matplotlib-canvas { background-color: white; }'
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if Gtk.check_version(4, 9, 3) is None:
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css.load_from_data(style, -1)
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else:
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css.load_from_data(style.encode('utf-8'))
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style_ctx = self.get_style_context()
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style_ctx.add_provider(css, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
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style_ctx.add_class("matplotlib-canvas")
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def destroy(self):
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CloseEvent("close_event", self)._process()
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def set_cursor(self, cursor):
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# docstring inherited
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self.set_cursor_from_name(_backend_gtk.mpl_to_gtk_cursor_name(cursor))
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def _mpl_coords(self, xy=None):
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"""
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Convert the *xy* position of a GTK event, or of the current cursor
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position if *xy* is None, to Matplotlib coordinates.
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GTK use logical pixels, but the figure is scaled to physical pixels for
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rendering. Transform to physical pixels so that all of the down-stream
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transforms work as expected.
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Also, the origin is different and needs to be corrected.
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"""
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if xy is None:
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surface = self.get_native().get_surface()
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is_over, x, y, mask = surface.get_device_position(
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self.get_display().get_default_seat().get_pointer())
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else:
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x, y = xy
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x = x * self.device_pixel_ratio
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# flip y so y=0 is bottom of canvas
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y = self.figure.bbox.height - y * self.device_pixel_ratio
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return x, y
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def scroll_event(self, controller, dx, dy):
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MouseEvent(
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"scroll_event", self, *self._mpl_coords(), step=dy,
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modifiers=self._mpl_modifiers(controller),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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return True
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def button_press_event(self, controller, n_press, x, y):
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MouseEvent(
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"button_press_event", self, *self._mpl_coords((x, y)),
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controller.get_current_button(),
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modifiers=self._mpl_modifiers(controller),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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self.grab_focus()
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def button_release_event(self, controller, n_press, x, y):
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MouseEvent(
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"button_release_event", self, *self._mpl_coords((x, y)),
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controller.get_current_button(),
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modifiers=self._mpl_modifiers(controller),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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def key_press_event(self, controller, keyval, keycode, state):
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KeyEvent(
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"key_press_event", self, self._get_key(keyval, keycode, state),
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*self._mpl_coords(),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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return True
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def key_release_event(self, controller, keyval, keycode, state):
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KeyEvent(
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"key_release_event", self, self._get_key(keyval, keycode, state),
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*self._mpl_coords(),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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return True
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def motion_notify_event(self, controller, x, y):
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MouseEvent(
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"motion_notify_event", self, *self._mpl_coords((x, y)),
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buttons=self._mpl_buttons(controller),
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modifiers=self._mpl_modifiers(controller),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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def enter_notify_event(self, controller, x, y):
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LocationEvent(
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"figure_enter_event", self, *self._mpl_coords((x, y)),
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modifiers=self._mpl_modifiers(),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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def leave_notify_event(self, controller):
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LocationEvent(
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"figure_leave_event", self, *self._mpl_coords(),
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modifiers=self._mpl_modifiers(),
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guiEvent=controller.get_current_event() if _GOBJECT_GE_3_47 else None,
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)._process()
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def resize_event(self, area, width, height):
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self._update_device_pixel_ratio()
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dpi = self.figure.dpi
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winch = width * self.device_pixel_ratio / dpi
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hinch = height * self.device_pixel_ratio / dpi
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self.figure.set_size_inches(winch, hinch, forward=False)
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ResizeEvent("resize_event", self)._process()
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self.draw_idle()
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def _mpl_buttons(self, controller):
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# NOTE: This spews "Broken accounting of active state" warnings on
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# right click on macOS.
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surface = self.get_native().get_surface()
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is_over, x, y, event_state = surface.get_device_position(
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self.get_display().get_default_seat().get_pointer())
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# NOTE: alternatively we could use
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# event_state = controller.get_current_event_state()
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# but for button_press/button_release this would report the state
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# *prior* to the event rather than after it; the above reports the
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# state *after* it.
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mod_table = [
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(MouseButton.LEFT, Gdk.ModifierType.BUTTON1_MASK),
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(MouseButton.MIDDLE, Gdk.ModifierType.BUTTON2_MASK),
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(MouseButton.RIGHT, Gdk.ModifierType.BUTTON3_MASK),
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(MouseButton.BACK, Gdk.ModifierType.BUTTON4_MASK),
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(MouseButton.FORWARD, Gdk.ModifierType.BUTTON5_MASK),
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]
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return {name for name, mask in mod_table if event_state & mask}
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def _mpl_modifiers(self, controller=None):
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if controller is None:
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surface = self.get_native().get_surface()
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is_over, x, y, event_state = surface.get_device_position(
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self.get_display().get_default_seat().get_pointer())
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else:
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event_state = controller.get_current_event_state()
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mod_table = [
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("ctrl", Gdk.ModifierType.CONTROL_MASK),
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("alt", Gdk.ModifierType.ALT_MASK),
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("shift", Gdk.ModifierType.SHIFT_MASK),
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("super", Gdk.ModifierType.SUPER_MASK),
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]
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return [name for name, mask in mod_table if event_state & mask]
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def _get_key(self, keyval, keycode, state):
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unikey = chr(Gdk.keyval_to_unicode(keyval))
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key = cbook._unikey_or_keysym_to_mplkey(
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unikey,
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Gdk.keyval_name(keyval))
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modifiers = [
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("ctrl", Gdk.ModifierType.CONTROL_MASK, "control"),
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("alt", Gdk.ModifierType.ALT_MASK, "alt"),
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("shift", Gdk.ModifierType.SHIFT_MASK, "shift"),
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("super", Gdk.ModifierType.SUPER_MASK, "super"),
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]
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mods = [
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mod for mod, mask, mod_key in modifiers
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if (mod_key != key and state & mask
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and not (mod == "shift" and unikey.isprintable()))]
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return "+".join([*mods, key])
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def _realize_event(self, obj):
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surface = self.get_native().get_surface()
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surface.connect('notify::scale', self._update_device_pixel_ratio)
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self._update_device_pixel_ratio()
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def _update_device_pixel_ratio(self, *args, **kwargs):
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# We need to be careful in cases with mixed resolution displays if
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# device_pixel_ratio changes.
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if _GTK_GE_4_12:
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scale = self.get_native().get_surface().get_scale()
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else:
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scale = self.get_scale_factor()
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assert scale is not None
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if self._set_device_pixel_ratio(scale):
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self.draw()
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def _draw_rubberband(self, rect):
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self._rubberband_rect = rect
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# TODO: Only update the rubberband area.
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self.queue_draw()
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def _draw_func(self, drawing_area, ctx, width, height):
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self.on_draw_event(self, ctx)
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self._post_draw(self, ctx)
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def _post_draw(self, widget, ctx):
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if self._rubberband_rect is None:
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return
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lw = 1
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dash = 3
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x0, y0, w, h = (dim / self.device_pixel_ratio
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for dim in self._rubberband_rect)
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x1 = x0 + w
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y1 = y0 + h
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# Draw the lines from x0, y0 towards x1, y1 so that the
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# dashes don't "jump" when moving the zoom box.
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ctx.move_to(x0, y0)
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ctx.line_to(x0, y1)
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ctx.move_to(x0, y0)
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ctx.line_to(x1, y0)
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ctx.move_to(x0, y1)
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ctx.line_to(x1, y1)
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ctx.move_to(x1, y0)
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ctx.line_to(x1, y1)
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ctx.set_antialias(1)
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ctx.set_line_width(lw)
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ctx.set_dash((dash, dash), 0)
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ctx.set_source_rgb(0, 0, 0)
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ctx.stroke_preserve()
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ctx.set_dash((dash, dash), dash)
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ctx.set_source_rgb(1, 1, 1)
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ctx.stroke()
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def on_draw_event(self, widget, ctx):
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# to be overwritten by GTK4Agg or GTK4Cairo
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pass
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def draw(self):
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# docstring inherited
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if self.is_drawable():
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self.queue_draw()
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def draw_idle(self):
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# docstring inherited
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if self._idle_draw_id != 0:
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return
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def idle_draw(*args):
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try:
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self.draw()
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finally:
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self._idle_draw_id = 0
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return False
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self._idle_draw_id = GLib.idle_add(idle_draw)
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def flush_events(self):
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# docstring inherited
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context = GLib.MainContext.default()
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while context.pending():
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context.iteration(True)
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class NavigationToolbar2GTK4(_NavigationToolbar2GTK, Gtk.Box):
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def __init__(self, canvas):
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Gtk.Box.__init__(self)
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self.add_css_class('toolbar')
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self._gtk_ids = {}
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for text, tooltip_text, image_file, callback in self.toolitems:
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if text is None:
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self.append(Gtk.Separator())
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continue
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image = Gtk.Image.new_from_gicon(
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Gio.Icon.new_for_string(
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str(cbook._get_data_path('images',
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f'{image_file}-symbolic.svg'))))
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self._gtk_ids[text] = button = (
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Gtk.ToggleButton() if callback in ['zoom', 'pan'] else
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Gtk.Button())
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button.set_child(image)
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button.add_css_class('flat')
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button.add_css_class('image-button')
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# Save the handler id, so that we can block it as needed.
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button._signal_handler = button.connect(
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'clicked', getattr(self, callback))
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button.set_tooltip_text(tooltip_text)
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self.append(button)
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# This filler item ensures the toolbar is always at least two text
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# lines high. Otherwise the canvas gets redrawn as the mouse hovers
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# over images because those use two-line messages which resize the
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# toolbar.
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label = Gtk.Label()
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label.set_markup(
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'<small>\N{NO-BREAK SPACE}\n\N{NO-BREAK SPACE}</small>')
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label.set_hexpand(True) # Push real message to the right.
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self.append(label)
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self.message = Gtk.Label()
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self.message.set_justify(Gtk.Justification.RIGHT)
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self.append(self.message)
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_NavigationToolbar2GTK.__init__(self, canvas)
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def save_figure(self, *args):
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dialog = Gtk.FileChooserNative(
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title='Save the figure',
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transient_for=self.canvas.get_root(),
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action=Gtk.FileChooserAction.SAVE,
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modal=True)
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self._save_dialog = dialog # Must keep a reference.
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ff = Gtk.FileFilter()
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ff.set_name('All files')
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ff.add_pattern('*')
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dialog.add_filter(ff)
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dialog.set_filter(ff)
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formats = []
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default_format = None
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for i, (name, fmts) in enumerate(
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self.canvas.get_supported_filetypes_grouped().items()):
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ff = Gtk.FileFilter()
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ff.set_name(name)
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for fmt in fmts:
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ff.add_pattern(f'*.{fmt}')
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dialog.add_filter(ff)
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formats.append(name)
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if self.canvas.get_default_filetype() in fmts:
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default_format = i
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# Setting the choice doesn't always work, so make sure the default
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# format is first.
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formats = [formats[default_format], *formats[:default_format],
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*formats[default_format+1:]]
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dialog.add_choice('format', 'File format', formats, formats)
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dialog.set_choice('format', formats[0])
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dialog.set_current_folder(Gio.File.new_for_path(
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os.path.expanduser(mpl.rcParams['savefig.directory'])))
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dialog.set_current_name(self.canvas.get_default_filename())
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@functools.partial(dialog.connect, 'response')
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def on_response(dialog, response):
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file = dialog.get_file()
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fmt = dialog.get_choice('format')
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fmt = self.canvas.get_supported_filetypes_grouped()[fmt][0]
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dialog.destroy()
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self._save_dialog = None
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if response != Gtk.ResponseType.ACCEPT:
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return
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# Save dir for next time, unless empty str (which means use cwd).
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if mpl.rcParams['savefig.directory']:
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parent = file.get_parent()
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mpl.rcParams['savefig.directory'] = parent.get_path()
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try:
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self.canvas.figure.savefig(file.get_path(), format=fmt)
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except Exception as e:
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msg = Gtk.MessageDialog(
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transient_for=self.canvas.get_root(),
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message_type=Gtk.MessageType.ERROR,
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buttons=Gtk.ButtonsType.OK, modal=True,
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text=str(e))
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msg.show()
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dialog.show()
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return self.UNKNOWN_SAVED_STATUS
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class ToolbarGTK4(ToolContainerBase, Gtk.Box):
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_icon_extension = '-symbolic.svg'
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def __init__(self, toolmanager):
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ToolContainerBase.__init__(self, toolmanager)
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Gtk.Box.__init__(self)
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self.set_property('orientation', Gtk.Orientation.HORIZONTAL)
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# Tool items are created later, but must appear before the message.
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self._tool_box = Gtk.Box()
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self.append(self._tool_box)
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self._groups = {}
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self._toolitems = {}
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# This filler item ensures the toolbar is always at least two text
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# lines high. Otherwise the canvas gets redrawn as the mouse hovers
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# over images because those use two-line messages which resize the
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# toolbar.
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label = Gtk.Label()
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label.set_markup(
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'<small>\N{NO-BREAK SPACE}\n\N{NO-BREAK SPACE}</small>')
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label.set_hexpand(True) # Push real message to the right.
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self.append(label)
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self._message = Gtk.Label()
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self._message.set_justify(Gtk.Justification.RIGHT)
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self.append(self._message)
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def add_toolitem(self, name, group, position, image_file, description,
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toggle):
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if toggle:
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button = Gtk.ToggleButton()
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else:
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button = Gtk.Button()
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button.set_label(name)
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button.add_css_class('flat')
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|
|
|
if image_file is not None:
|
|
image = Gtk.Image.new_from_gicon(
|
|
Gio.Icon.new_for_string(image_file))
|
|
button.set_child(image)
|
|
button.add_css_class('image-button')
|
|
|
|
if position is None:
|
|
position = -1
|
|
|
|
self._add_button(button, group, position)
|
|
signal = button.connect('clicked', self._call_tool, name)
|
|
button.set_tooltip_text(description)
|
|
self._toolitems.setdefault(name, [])
|
|
self._toolitems[name].append((button, signal))
|
|
|
|
def _find_child_at_position(self, group, position):
|
|
children = [None]
|
|
child = self._groups[group].get_first_child()
|
|
while child is not None:
|
|
children.append(child)
|
|
child = child.get_next_sibling()
|
|
return children[position]
|
|
|
|
def _add_button(self, button, group, position):
|
|
if group not in self._groups:
|
|
if self._groups:
|
|
self._add_separator()
|
|
group_box = Gtk.Box()
|
|
self._tool_box.append(group_box)
|
|
self._groups[group] = group_box
|
|
self._groups[group].insert_child_after(
|
|
button, self._find_child_at_position(group, position))
|
|
|
|
def _call_tool(self, btn, name):
|
|
self.trigger_tool(name)
|
|
|
|
def toggle_toolitem(self, name, toggled):
|
|
if name not in self._toolitems:
|
|
return
|
|
for toolitem, signal in self._toolitems[name]:
|
|
toolitem.handler_block(signal)
|
|
toolitem.set_active(toggled)
|
|
toolitem.handler_unblock(signal)
|
|
|
|
def remove_toolitem(self, name):
|
|
for toolitem, _signal in self._toolitems.pop(name, []):
|
|
for group in self._groups:
|
|
if toolitem in self._groups[group]:
|
|
self._groups[group].remove(toolitem)
|
|
|
|
def _add_separator(self):
|
|
sep = Gtk.Separator()
|
|
sep.set_property("orientation", Gtk.Orientation.VERTICAL)
|
|
self._tool_box.append(sep)
|
|
|
|
def set_message(self, s):
|
|
self._message.set_label(s)
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK4)
|
|
class SaveFigureGTK4(backend_tools.SaveFigureBase):
|
|
def trigger(self, *args, **kwargs):
|
|
NavigationToolbar2GTK4.save_figure(
|
|
self._make_classic_style_pseudo_toolbar())
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK4)
|
|
class HelpGTK4(backend_tools.ToolHelpBase):
|
|
def _normalize_shortcut(self, key):
|
|
"""
|
|
Convert Matplotlib key presses to GTK+ accelerator identifiers.
|
|
|
|
Related to `FigureCanvasGTK4._get_key`.
|
|
"""
|
|
special = {
|
|
'backspace': 'BackSpace',
|
|
'pagedown': 'Page_Down',
|
|
'pageup': 'Page_Up',
|
|
'scroll_lock': 'Scroll_Lock',
|
|
}
|
|
|
|
parts = key.split('+')
|
|
mods = ['<' + mod + '>' for mod in parts[:-1]]
|
|
key = parts[-1]
|
|
|
|
if key in special:
|
|
key = special[key]
|
|
elif len(key) > 1:
|
|
key = key.capitalize()
|
|
elif key.isupper():
|
|
mods += ['<shift>']
|
|
|
|
return ''.join(mods) + key
|
|
|
|
def _is_valid_shortcut(self, key):
|
|
"""
|
|
Check for a valid shortcut to be displayed.
|
|
|
|
- GTK will never send 'cmd+' (see `FigureCanvasGTK4._get_key`).
|
|
- The shortcut window only shows keyboard shortcuts, not mouse buttons.
|
|
"""
|
|
return 'cmd+' not in key and not key.startswith('MouseButton.')
|
|
|
|
def trigger(self, *args):
|
|
section = Gtk.ShortcutsSection()
|
|
|
|
for name, tool in sorted(self.toolmanager.tools.items()):
|
|
if not tool.description:
|
|
continue
|
|
|
|
# Putting everything in a separate group allows GTK to
|
|
# automatically split them into separate columns/pages, which is
|
|
# useful because we have lots of shortcuts, some with many keys
|
|
# that are very wide.
|
|
group = Gtk.ShortcutsGroup()
|
|
section.append(group)
|
|
# A hack to remove the title since we have no group naming.
|
|
child = group.get_first_child()
|
|
while child is not None:
|
|
child.set_visible(False)
|
|
child = child.get_next_sibling()
|
|
|
|
shortcut = Gtk.ShortcutsShortcut(
|
|
accelerator=' '.join(
|
|
self._normalize_shortcut(key)
|
|
for key in self.toolmanager.get_tool_keymap(name)
|
|
if self._is_valid_shortcut(key)),
|
|
title=tool.name,
|
|
subtitle=tool.description)
|
|
group.append(shortcut)
|
|
|
|
window = Gtk.ShortcutsWindow(
|
|
title='Help',
|
|
modal=True,
|
|
transient_for=self._figure.canvas.get_root())
|
|
window.set_child(section)
|
|
|
|
window.show()
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK4)
|
|
class ToolCopyToClipboardGTK4(backend_tools.ToolCopyToClipboardBase):
|
|
def trigger(self, *args, **kwargs):
|
|
with io.BytesIO() as f:
|
|
self.canvas.print_rgba(f)
|
|
w, h = self.canvas.get_width_height()
|
|
pb = GdkPixbuf.Pixbuf.new_from_data(f.getbuffer(),
|
|
GdkPixbuf.Colorspace.RGB, True,
|
|
8, w, h, w*4)
|
|
clipboard = self.canvas.get_clipboard()
|
|
clipboard.set(pb)
|
|
|
|
|
|
backend_tools._register_tool_class(
|
|
FigureCanvasGTK4, _backend_gtk.ConfigureSubplotsGTK)
|
|
backend_tools._register_tool_class(
|
|
FigureCanvasGTK4, _backend_gtk.RubberbandGTK)
|
|
Toolbar = ToolbarGTK4
|
|
|
|
|
|
class FigureManagerGTK4(_FigureManagerGTK):
|
|
_toolbar2_class = NavigationToolbar2GTK4
|
|
_toolmanager_toolbar_class = ToolbarGTK4
|
|
|
|
|
|
@_BackendGTK.export
|
|
class _BackendGTK4(_BackendGTK):
|
|
FigureCanvas = FigureCanvasGTK4
|
|
FigureManager = FigureManagerGTK4
|