583 lines
21 KiB
Python
583 lines
21 KiB
Python
import functools
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import logging
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import os
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from pathlib import Path
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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, CloseEvent, KeyEvent, LocationEvent, MouseEvent,
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ResizeEvent)
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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 GTK3 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", "3.0")
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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, GObject, Gtk, Gdk
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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 TimerGTK3,
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)
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_log = logging.getLogger(__name__)
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@functools.cache
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def _mpl_to_gtk_cursor(mpl_cursor):
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return Gdk.Cursor.new_from_name(
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Gdk.Display.get_default(),
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_backend_gtk.mpl_to_gtk_cursor_name(mpl_cursor))
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class FigureCanvasGTK3(_FigureCanvasGTK, Gtk.DrawingArea):
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required_interactive_framework = "gtk3"
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manager_class = _api.classproperty(lambda cls: FigureManagerGTK3)
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# Setting this as a static constant prevents
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# this resulting expression from leaking
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event_mask = (Gdk.EventMask.BUTTON_PRESS_MASK
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| Gdk.EventMask.BUTTON_RELEASE_MASK
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| Gdk.EventMask.EXPOSURE_MASK
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| Gdk.EventMask.KEY_PRESS_MASK
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| Gdk.EventMask.KEY_RELEASE_MASK
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| Gdk.EventMask.ENTER_NOTIFY_MASK
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| Gdk.EventMask.LEAVE_NOTIFY_MASK
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| Gdk.EventMask.POINTER_MOTION_MASK
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| Gdk.EventMask.SCROLL_MASK)
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def __init__(self, figure=None):
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super().__init__(figure=figure)
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self._idle_draw_id = 0
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self._rubberband_rect = None
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self.connect('scroll_event', self.scroll_event)
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self.connect('button_press_event', self.button_press_event)
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self.connect('button_release_event', self.button_release_event)
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self.connect('configure_event', self.configure_event)
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self.connect('screen-changed', self._update_device_pixel_ratio)
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self.connect('notify::scale-factor', self._update_device_pixel_ratio)
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self.connect('draw', self.on_draw_event)
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self.connect('draw', self._post_draw)
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self.connect('key_press_event', self.key_press_event)
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self.connect('key_release_event', self.key_release_event)
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self.connect('motion_notify_event', self.motion_notify_event)
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self.connect('enter_notify_event', self.enter_notify_event)
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self.connect('leave_notify_event', self.leave_notify_event)
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self.connect('size_allocate', self.size_allocate)
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self.set_events(self.__class__.event_mask)
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self.set_can_focus(True)
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css = Gtk.CssProvider()
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css.load_from_data(b".matplotlib-canvas { background-color: white; }")
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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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window = self.get_property("window")
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if window is not None:
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window.set_cursor(_mpl_to_gtk_cursor(cursor))
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context = GLib.MainContext.default()
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context.iteration(True)
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def _mpl_coords(self, event=None):
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"""
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Convert the position of a GTK event, or of the current cursor position
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if *event* 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 event is None:
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window = self.get_window()
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t, x, y, state = window.get_device_position(
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window.get_display().get_device_manager().get_client_pointer())
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else:
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x, y = event.x, event.y
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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, widget, event):
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step = 1 if event.direction == Gdk.ScrollDirection.UP else -1
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MouseEvent("scroll_event", self,
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*self._mpl_coords(event), step=step,
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modifiers=self._mpl_modifiers(event.state),
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guiEvent=event)._process()
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return False # finish event propagation?
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def button_press_event(self, widget, event):
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MouseEvent("button_press_event", self,
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*self._mpl_coords(event), event.button,
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modifiers=self._mpl_modifiers(event.state),
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guiEvent=event)._process()
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return False # finish event propagation?
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def button_release_event(self, widget, event):
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MouseEvent("button_release_event", self,
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*self._mpl_coords(event), event.button,
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modifiers=self._mpl_modifiers(event.state),
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guiEvent=event)._process()
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return False # finish event propagation?
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def key_press_event(self, widget, event):
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KeyEvent("key_press_event", self,
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self._get_key(event), *self._mpl_coords(),
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guiEvent=event)._process()
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return True # stop event propagation
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def key_release_event(self, widget, event):
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KeyEvent("key_release_event", self,
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self._get_key(event), *self._mpl_coords(),
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guiEvent=event)._process()
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return True # stop event propagation
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def motion_notify_event(self, widget, event):
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MouseEvent("motion_notify_event", self, *self._mpl_coords(event),
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modifiers=self._mpl_modifiers(event.state),
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guiEvent=event)._process()
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return False # finish event propagation?
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def enter_notify_event(self, widget, event):
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gtk_mods = Gdk.Keymap.get_for_display(
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self.get_display()).get_modifier_state()
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LocationEvent("figure_enter_event", self, *self._mpl_coords(event),
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modifiers=self._mpl_modifiers(gtk_mods),
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guiEvent=event)._process()
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def leave_notify_event(self, widget, event):
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gtk_mods = Gdk.Keymap.get_for_display(
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self.get_display()).get_modifier_state()
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LocationEvent("figure_leave_event", self, *self._mpl_coords(event),
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modifiers=self._mpl_modifiers(gtk_mods),
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guiEvent=event)._process()
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def size_allocate(self, widget, allocation):
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dpival = self.figure.dpi
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winch = allocation.width * self.device_pixel_ratio / dpival
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hinch = allocation.height * self.device_pixel_ratio / dpival
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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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@staticmethod
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def _mpl_modifiers(event_state, *, exclude=None):
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modifiers = [
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("ctrl", Gdk.ModifierType.CONTROL_MASK, "control"),
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("alt", Gdk.ModifierType.MOD1_MASK, "alt"),
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("shift", Gdk.ModifierType.SHIFT_MASK, "shift"),
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("super", Gdk.ModifierType.MOD4_MASK, "super"),
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]
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return [name for name, mask, key in modifiers
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if exclude != key and event_state & mask]
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def _get_key(self, event):
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unikey = chr(Gdk.keyval_to_unicode(event.keyval))
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key = cbook._unikey_or_keysym_to_mplkey(
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unikey, Gdk.keyval_name(event.keyval))
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mods = self._mpl_modifiers(event.state, exclude=key)
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if "shift" in mods and unikey.isprintable():
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mods.remove("shift")
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return "+".join([*mods, key])
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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 self._set_device_pixel_ratio(self.get_scale_factor()):
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# The easiest way to resize the canvas is to emit a resize event
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# since we implement all the logic for resizing the canvas for that
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# event.
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self.queue_resize()
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self.queue_draw()
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def configure_event(self, widget, event):
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if widget.get_property("window") is None:
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return
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w = event.width * self.device_pixel_ratio
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h = event.height * self.device_pixel_ratio
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if w < 3 or h < 3:
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return # empty fig
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# resize the figure (in inches)
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dpi = self.figure.dpi
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self.figure.set_size_inches(w / dpi, h / dpi, forward=False)
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return False # finish event propagation?
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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 _post_draw(self, widget, ctx):
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if self._rubberband_rect is None:
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return
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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(1)
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ctx.set_dash((3, 3), 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((3, 3), 3)
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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 GTK3Agg or GTK3Cairo
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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 NavigationToolbar2GTK3(_NavigationToolbar2GTK, Gtk.Toolbar):
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def __init__(self, canvas):
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GObject.GObject.__init__(self)
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self.set_style(Gtk.ToolbarStyle.ICONS)
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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.insert(Gtk.SeparatorToolItem(), -1)
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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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Gtk.IconSize.LARGE_TOOLBAR)
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self._gtk_ids[text] = button = (
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Gtk.ToggleToolButton() if callback in ['zoom', 'pan'] else
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Gtk.ToolButton())
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button.set_label(text)
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button.set_icon_widget(image)
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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.insert(button, -1)
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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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toolitem = Gtk.ToolItem()
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self.insert(toolitem, -1)
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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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toolitem.set_expand(True) # Push real message to the right.
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toolitem.add(label)
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toolitem = Gtk.ToolItem()
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self.insert(toolitem, -1)
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self.message = Gtk.Label()
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self.message.set_justify(Gtk.Justification.RIGHT)
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toolitem.add(self.message)
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self.show_all()
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_NavigationToolbar2GTK.__init__(self, canvas)
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def save_figure(self, *args):
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dialog = Gtk.FileChooserDialog(
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title="Save the figure",
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parent=self.canvas.get_toplevel(),
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action=Gtk.FileChooserAction.SAVE,
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buttons=(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
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Gtk.STOCK_SAVE, Gtk.ResponseType.OK),
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)
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for name, fmts \
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in 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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if self.canvas.get_default_filetype() in fmts:
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dialog.set_filter(ff)
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|
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@functools.partial(dialog.connect, "notify::filter")
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def on_notify_filter(*args):
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name = dialog.get_filter().get_name()
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fmt = self.canvas.get_supported_filetypes_grouped()[name][0]
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dialog.set_current_name(
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str(Path(dialog.get_current_name()).with_suffix(f'.{fmt}')))
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dialog.set_current_folder(mpl.rcParams["savefig.directory"])
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dialog.set_current_name(self.canvas.get_default_filename())
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dialog.set_do_overwrite_confirmation(True)
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response = dialog.run()
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fname = dialog.get_filename()
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ff = dialog.get_filter() # Doesn't autoadjust to filename :/
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fmt = self.canvas.get_supported_filetypes_grouped()[ff.get_name()][0]
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dialog.destroy()
|
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if response != Gtk.ResponseType.OK:
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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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mpl.rcParams['savefig.directory'] = os.path.dirname(fname)
|
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try:
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self.canvas.figure.savefig(fname, format=fmt)
|
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except Exception as e:
|
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dialog = Gtk.MessageDialog(
|
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parent=self.canvas.get_toplevel(), message_format=str(e),
|
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type=Gtk.MessageType.ERROR, buttons=Gtk.ButtonsType.OK)
|
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dialog.run()
|
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dialog.destroy()
|
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|
|
|
|
class ToolbarGTK3(ToolContainerBase, Gtk.Box):
|
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_icon_extension = '-symbolic.svg'
|
|
|
|
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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self._message = Gtk.Label()
|
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self._message.set_justify(Gtk.Justification.RIGHT)
|
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self.pack_end(self._message, False, False, 0)
|
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self.show_all()
|
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self._groups = {}
|
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self._toolitems = {}
|
|
|
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def add_toolitem(self, name, group, position, image_file, description,
|
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toggle):
|
|
if toggle:
|
|
button = Gtk.ToggleToolButton()
|
|
else:
|
|
button = Gtk.ToolButton()
|
|
button.set_label(name)
|
|
|
|
if image_file is not None:
|
|
image = Gtk.Image.new_from_gicon(
|
|
Gio.Icon.new_for_string(image_file),
|
|
Gtk.IconSize.LARGE_TOOLBAR)
|
|
button.set_icon_widget(image)
|
|
|
|
if position is None:
|
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position = -1
|
|
|
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self._add_button(button, group, position)
|
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signal = button.connect('clicked', self._call_tool, name)
|
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button.set_tooltip_text(description)
|
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button.show_all()
|
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self._toolitems.setdefault(name, [])
|
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self._toolitems[name].append((button, signal))
|
|
|
|
def _add_button(self, button, group, position):
|
|
if group not in self._groups:
|
|
if self._groups:
|
|
self._add_separator()
|
|
toolbar = Gtk.Toolbar()
|
|
toolbar.set_style(Gtk.ToolbarStyle.ICONS)
|
|
self.pack_start(toolbar, False, False, 0)
|
|
toolbar.show_all()
|
|
self._groups[group] = toolbar
|
|
self._groups[group].insert(button, 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.pack_start(sep, False, True, 0)
|
|
sep.show_all()
|
|
|
|
def set_message(self, s):
|
|
self._message.set_label(s)
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK3)
|
|
class SaveFigureGTK3(backend_tools.SaveFigureBase):
|
|
def trigger(self, *args, **kwargs):
|
|
NavigationToolbar2GTK3.save_figure(
|
|
self._make_classic_style_pseudo_toolbar())
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK3)
|
|
class HelpGTK3(backend_tools.ToolHelpBase):
|
|
def _normalize_shortcut(self, key):
|
|
"""
|
|
Convert Matplotlib key presses to GTK+ accelerator identifiers.
|
|
|
|
Related to `FigureCanvasGTK3._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 `FigureCanvasGTK3._get_key`).
|
|
- The shortcut window only shows keyboard shortcuts, not mouse buttons.
|
|
"""
|
|
return 'cmd+' not in key and not key.startswith('MouseButton.')
|
|
|
|
def _show_shortcuts_window(self):
|
|
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.add(group)
|
|
# A hack to remove the title since we have no group naming.
|
|
group.forall(lambda widget, data: widget.set_visible(False), None)
|
|
|
|
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.add(shortcut)
|
|
|
|
window = Gtk.ShortcutsWindow(
|
|
title='Help',
|
|
modal=True,
|
|
transient_for=self._figure.canvas.get_toplevel())
|
|
section.show() # Must be done explicitly before add!
|
|
window.add(section)
|
|
|
|
window.show_all()
|
|
|
|
def _show_shortcuts_dialog(self):
|
|
dialog = Gtk.MessageDialog(
|
|
self._figure.canvas.get_toplevel(),
|
|
0, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, self._get_help_text(),
|
|
title="Help")
|
|
dialog.run()
|
|
dialog.destroy()
|
|
|
|
def trigger(self, *args):
|
|
if Gtk.check_version(3, 20, 0) is None:
|
|
self._show_shortcuts_window()
|
|
else:
|
|
self._show_shortcuts_dialog()
|
|
|
|
|
|
@backend_tools._register_tool_class(FigureCanvasGTK3)
|
|
class ToolCopyToClipboardGTK3(backend_tools.ToolCopyToClipboardBase):
|
|
def trigger(self, *args, **kwargs):
|
|
clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
|
|
window = self.canvas.get_window()
|
|
x, y, width, height = window.get_geometry()
|
|
pb = Gdk.pixbuf_get_from_window(window, x, y, width, height)
|
|
clipboard.set_image(pb)
|
|
|
|
|
|
Toolbar = ToolbarGTK3
|
|
backend_tools._register_tool_class(
|
|
FigureCanvasGTK3, _backend_gtk.ConfigureSubplotsGTK)
|
|
backend_tools._register_tool_class(
|
|
FigureCanvasGTK3, _backend_gtk.RubberbandGTK)
|
|
|
|
|
|
class FigureManagerGTK3(_FigureManagerGTK):
|
|
_toolbar2_class = NavigationToolbar2GTK3
|
|
_toolmanager_toolbar_class = ToolbarGTK3
|
|
|
|
|
|
@_BackendGTK.export
|
|
class _BackendGTK3(_BackendGTK):
|
|
FigureCanvas = FigureCanvasGTK3
|
|
FigureManager = FigureManagerGTK3
|