matplotlib/lib/matplotlib/backend_tools.py at v3.11.2 · matplotlib/matplotlib · GitHub

History

1001 lines (786 loc) · 32.6 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

"""

Abstract base classes define the primitives for Tools.

These tools are used by `matplotlib.backend_managers.ToolManager`

:class:`ToolBase`

Simple stateless tool

:class:`ToolToggleBase`

Tool that has two states, only one Toggle tool can be

active at any given time for the same

`matplotlib.backend_managers.ToolManager`

"""

import enum

import functools

import re

import time

from types import SimpleNamespace

import uuid

from weakref import WeakKeyDictionary

import numpy as np

import matplotlib as mpl

from matplotlib._pylab_helpers import Gcf

from matplotlib import _api, cbook

class Cursors(enum.IntEnum): # Must subclass int for the macOS backend.

"""Backend-independent cursor types."""

POINTER = enum.auto()

HAND = enum.auto()

SELECT_REGION = enum.auto()

MOVE = enum.auto()

WAIT = enum.auto()

RESIZE_HORIZONTAL = enum.auto()

RESIZE_VERTICAL = enum.auto()

cursors = Cursors # Backcompat.

# _tool_registry, _register_tool_class, and _find_tool_class implement a

# mechanism through which ToolManager.add_tool can determine whether a subclass

# of the requested tool class has been registered (either for the current

# canvas class or for a parent class), in which case that tool subclass will be

# instantiated instead. This is the mechanism used e.g. to allow different

# GUI backends to implement different specializations for ConfigureSubplots.

_tool_registry = set()

def _register_tool_class(canvas_cls, tool_cls=None):

"""Decorator registering *tool_cls* as a tool class for *canvas_cls*."""

if tool_cls is None:

return functools.partial(_register_tool_class, canvas_cls)

_tool_registry.add((canvas_cls, tool_cls))

return tool_cls

def _find_tool_class(canvas_cls, tool_cls):

"""Find a subclass of *tool_cls* registered for *canvas_cls*."""

for canvas_parent in canvas_cls.__mro__:

for tool_child in _api.recursive_subclasses(tool_cls):

if (canvas_parent, tool_child) in _tool_registry:

return tool_child

return tool_cls

# Views positions tool

_views_positions = 'viewpos'

class ToolBase:

"""

Base tool class.

A base tool, only implements `trigger` method or no method at all.

The tool is instantiated by `matplotlib.backend_managers.ToolManager`.

"""

default_keymap = None

"""

Keymap to associate with this tool.

``list[str]``: List of keys that will trigger this tool when a keypress

event is emitted on ``self.figure.canvas``. Note that this attribute is

looked up on the instance, and can therefore be a property (this is used

e.g. by the built-in tools to load the rcParams at instantiation time).

"""

description = None

"""

Description of the Tool.

`str`: Tooltip used if the Tool is included in a Toolbar.

"""

image = None

"""

Icon filename.

``str | None``: Filename of the Toolbar icon; either absolute, or relative to the

directory containing the Python source file where the ``Tool.image`` class attribute

is defined (in the latter case, this cannot be defined as an instance attribute).

In either case, the extension is optional; leaving it off lets individual backends

select the icon format they prefer. If None, the *name* is used as a label in the

toolbar button.

"""

def __init__(self, toolmanager, name):

self._name = name

self._toolmanager = toolmanager

self._figure = None

name = property(

lambda self: self._name,

doc="The tool id (str, must be unique among tools of a tool manager).")

toolmanager = property(

lambda self: self._toolmanager,

doc="The `.ToolManager` that controls this tool.")

canvas = property(

lambda self: self._figure.canvas if self._figure is not None else None,

doc="The canvas of the figure affected by this tool, or None.")

def set_figure(self, figure):

self._figure = figure

figure = property(

lambda self: self._figure,

# The setter must explicitly call self.set_figure so that subclasses can

# meaningfully override it.

lambda self, figure: self.set_figure(figure),

doc="The Figure affected by this tool, or None.")

def _make_classic_style_pseudo_toolbar(self):

"""

Return a placeholder object with a single `canvas` attribute.

This is useful to reuse the implementations of tools already provided

by the classic Toolbars.

"""

return SimpleNamespace(canvas=self.canvas)

def trigger(self, sender, event, data=None):

"""

Called when this tool gets used.

This method is called by `.ToolManager.trigger_tool`.

Parameters

----------

event : `.Event`

The canvas event that caused this tool to be called.

sender : object

Object that requested the tool to be triggered.

data : object

Extra data.

"""

pass

class ToolToggleBase(ToolBase):

"""

Toggleable tool.

Every time it is triggered, it switches between enable and disable.

Parameters

----------

``*args``

Variable length argument to be used by the Tool.

``**kwargs``

`toggled` if present and True, sets the initial state of the Tool

Arbitrary keyword arguments to be consumed by the Tool

"""

radio_group = None

"""

Attribute to group 'radio' like tools (mutually exclusive).

`str` that identifies the group or **None** if not belonging to a group.

"""

cursor = None

"""Cursor to use when the tool is active."""

default_toggled = False

"""Default of toggled state."""

def __init__(self, *args, **kwargs):

self._toggled = kwargs.pop('toggled', self.default_toggled)

super().__init__(*args, **kwargs)

def trigger(self, sender, event, data=None):

"""Calls `enable` or `disable` based on `~ToolToggleBase.toggled` value."""

if self._toggled:

self.disable(event)

else:

self.enable(event)

self._toggled = not self._toggled

def enable(self, event=None):

"""

Enable the toggle tool.

`trigger` calls this method when `~ToolToggleBase.toggled` is False.

"""

pass

def disable(self, event=None):

"""

Disable the toggle tool.

`trigger` call this method when `~ToolToggleBase.toggled` is True.

This can happen in different circumstances.

* Click on the toolbar tool button.

* Call to `matplotlib.backend_managers.ToolManager.trigger_tool`.

* Another `ToolToggleBase` derived tool is triggered

(from the same `.ToolManager`).

"""

pass

@property

def toggled(self):

"""State of the toggled tool."""

return self._toggled

def set_figure(self, figure):

toggled = self.toggled

if toggled:

if self.figure:

self.trigger(self, None)

else:

# if no figure the internal state is not changed

# we change it here so next call to trigger will change it back

self._toggled = False

super().set_figure(figure)

if toggled:

if figure:

self.trigger(self, None)

else:

# if there is no figure, trigger won't change the internal

# state we change it back

self._toggled = True

class ToolSetCursor(ToolBase):

"""

Change to the current cursor while inaxes.

This tool, keeps track of all `ToolToggleBase` derived tools, and updates

the cursor when a tool gets triggered.

"""

def __init__(self, *args, **kwargs):

super().__init__(*args, **kwargs)

self._id_drag = None

self._current_tool = None

self._default_cursor = cursors.POINTER

self._last_cursor = self._default_cursor

self.toolmanager.toolmanager_connect('tool_added_event',

self._add_tool_cbk)

for tool in self.toolmanager.tools.values(): # process current tools

self._add_tool_cbk(mpl.backend_managers.ToolEvent(

'tool_added_event', self.toolmanager, tool))

def set_figure(self, figure):

if self._id_drag:

self.canvas.mpl_disconnect(self._id_drag)

super().set_figure(figure)

if figure:

self._id_drag = self.canvas.mpl_connect(

'motion_notify_event', self._set_cursor_cbk)

def _add_tool_cbk(self, event):

"""Process every newly added tool."""

if getattr(event.tool, 'cursor', None) is not None:

self.toolmanager.toolmanager_connect(

f'tool_trigger_{event.tool.name}', self._tool_trigger_cbk)

def _tool_trigger_cbk(self, event):

self._current_tool = event.tool if event.tool.toggled else None

self._set_cursor_cbk(event.canvasevent)

def _set_cursor_cbk(self, event):

if not event or not self.canvas:

return

if (self._current_tool and getattr(event, "inaxes", None)

and event.inaxes.get_navigate()):

if self._last_cursor != self._current_tool.cursor:

self.canvas.set_cursor(self._current_tool.cursor)

self._last_cursor = self._current_tool.cursor

elif self._last_cursor != self._default_cursor:

self.canvas.set_cursor(self._default_cursor)

self._last_cursor = self._default_cursor

class ToolCursorPosition(ToolBase):

"""

Send message with the current pointer position.

This tool runs in the background reporting the position of the cursor.

"""

def __init__(self, *args, **kwargs):

self._id_drag = None

super().__init__(*args, **kwargs)

def set_figure(self, figure):

if self._id_drag:

self.canvas.mpl_disconnect(self._id_drag)

super().set_figure(figure)

if figure:

self._id_drag = self.canvas.mpl_connect(

'motion_notify_event', self.send_message)

def send_message(self, event):

"""Call `matplotlib.backend_managers.ToolManager.message_event`."""

if self.toolmanager.messagelock.locked():

return

from matplotlib.backend_bases import NavigationToolbar2

message = NavigationToolbar2._mouse_event_to_message(event)

self.toolmanager.message_event(message, self)

class RubberbandBase(ToolBase):

"""Draw and remove a rubberband."""

def trigger(self, sender, event, data=None):

"""Call `draw_rubberband` or `remove_rubberband` based on data."""

if not self.figure.canvas.widgetlock.available(sender):

return

if data is not None:

self.draw_rubberband(*data)

else:

self.remove_rubberband()

def draw_rubberband(self, *data):

"""

Draw rubberband.

This method must get implemented per backend.

"""

raise NotImplementedError

def remove_rubberband(self):

"""

Remove rubberband.

This method should get implemented per backend.

"""

pass

class ToolQuit(ToolBase):

"""Tool to call the figure manager destroy method."""

description = 'Quit the figure'

default_keymap = property(lambda self: mpl.rcParams['keymap.quit'])

def trigger(self, sender, event, data=None):

Gcf.destroy_fig(self.figure)

class ToolQuitAll(ToolBase):

"""Tool to call the figure manager destroy method."""

description = 'Quit all figures'

default_keymap = property(lambda self: mpl.rcParams['keymap.quit_all'])

def trigger(self, sender, event, data=None):

Gcf.destroy_all()

class ToolGrid(ToolBase):

"""Tool to toggle the major grids of the figure."""

description = 'Toggle major grids'

default_keymap = property(lambda self: mpl.rcParams['keymap.grid'])

def trigger(self, sender, event, data=None):

sentinel = str(uuid.uuid4())

# Trigger grid switching by temporarily setting :rc:`keymap.grid`

# to a unique key and sending an appropriate event.

with (cbook._setattr_cm(event, key=sentinel),

mpl.rc_context({'keymap.grid': sentinel})):

mpl.backend_bases.key_press_handler(event, self.figure.canvas)

class ToolMinorGrid(ToolBase):

"""Tool to toggle the major and minor grids of the figure."""

description = 'Toggle major and minor grids'

default_keymap = property(lambda self: mpl.rcParams['keymap.grid_minor'])

def trigger(self, sender, event, data=None):

sentinel = str(uuid.uuid4())

# Trigger grid switching by temporarily setting :rc:`keymap.grid_minor`

# to a unique key and sending an appropriate event.

with (cbook._setattr_cm(event, key=sentinel),

mpl.rc_context({'keymap.grid_minor': sentinel})):

mpl.backend_bases.key_press_handler(event, self.figure.canvas)

class ToolFullScreen(ToolBase):

"""Tool to toggle full screen."""

description = 'Toggle fullscreen mode'

default_keymap = property(lambda self: mpl.rcParams['keymap.fullscreen'])

def trigger(self, sender, event, data=None):

self.figure.canvas.manager.full_screen_toggle()

class AxisScaleBase(ToolToggleBase):

"""Base Tool to toggle between linear and logarithmic."""

def trigger(self, sender, event, data=None):

if event.inaxes is None:

return

super().trigger(sender, event, data)

def enable(self, event=None):

self.set_scale(event.inaxes, 'log')

self.figure.canvas.draw_idle()

def disable(self, event=None):

self.set_scale(event.inaxes, 'linear')

self.figure.canvas.draw_idle()

class ToolYScale(AxisScaleBase):

"""Tool to toggle between linear and logarithmic scales on the Y axis."""

description = 'Toggle scale Y axis'

default_keymap = property(lambda self: mpl.rcParams['keymap.yscale'])

def set_scale(self, ax, scale):

ax.set_yscale(scale)

class ToolXScale(AxisScaleBase):

"""Tool to toggle between linear and logarithmic scales on the X axis."""

description = 'Toggle scale X axis'

default_keymap = property(lambda self: mpl.rcParams['keymap.xscale'])

def set_scale(self, ax, scale):

ax.set_xscale(scale)

class ToolViewsPositions(ToolBase):

"""

Auxiliary Tool to handle changes in views and positions.

Runs in the background and should get used by all the tools that

need to access the figure's history of views and positions, e.g.

* `ToolZoom`

* `ToolPan`

* `ToolHome`

* `ToolBack`

* `ToolForward`

"""

def __init__(self, *args, **kwargs):

self.views = WeakKeyDictionary()

self.positions = WeakKeyDictionary()

self.home_views = WeakKeyDictionary()

super().__init__(*args, **kwargs)

def add_figure(self, figure):

"""Add the current figure to the stack of views and positions."""

if figure not in self.views:

self.views[figure] = cbook._Stack()

self.positions[figure] = cbook._Stack()

self.home_views[figure] = WeakKeyDictionary()

# Define Home

self.push_current(figure)

# Make sure we add a home view for new Axes as they're added

figure.add_axobserver(lambda fig: self.update_home_views(fig))

def clear(self, figure):

"""Reset the Axes stack."""

if figure in self.views:

self.views[figure].clear()

self.positions[figure].clear()

self.home_views[figure].clear()

self.update_home_views()

def update_view(self):

"""

Update the view limits and position for each Axes from the current

stack position. If any Axes are present in the figure that aren't in

the current stack position, use the home view limits for those Axes and

don't update *any* positions.

"""

views = self.views[self.figure]()

if views is None:

return

pos = self.positions[self.figure]()

if pos is None:

return

home_views = self.home_views[self.figure]

all_axes = self.figure.get_axes()

for a in all_axes:

if a in views:

cur_view = views[a]

else:

cur_view = home_views[a]

a._set_view(cur_view)

if set(all_axes).issubset(pos):

for a in all_axes:

# Restore both the original and modified positions

a._set_position(pos[a][0], 'original')

a._set_position(pos[a][1], 'active')

self.figure.canvas.draw_idle()

def push_current(self, figure=None):

"""

Push the current view limits and position onto their respective stacks.

"""

if not figure:

figure = self.figure

views = WeakKeyDictionary()

pos = WeakKeyDictionary()

for a in figure.get_axes():

views[a] = a._get_view()

pos[a] = self._axes_pos(a)

self.views[figure].push(views)

self.positions[figure].push(pos)

def _axes_pos(self, ax):

"""

Return the original and modified positions for the specified Axes.

Parameters

----------

ax : matplotlib.axes.Axes

The `.Axes` to get the positions for.

Returns

-------

original_position, modified_position

A tuple of the original and modified positions.

"""

return (ax.get_position(True).frozen(),

ax.get_position().frozen())

def update_home_views(self, figure=None):

"""

Make sure that ``self.home_views`` has an entry for all Axes present

in the figure.

"""

if not figure:

figure = self.figure

for a in figure.get_axes():

if a not in self.home_views[figure]:

self.home_views[figure][a] = a._get_view()

def home(self):

"""Recall the first view and position from the stack."""

self.views[self.figure].home()

self.positions[self.figure].home()

def back(self):

"""Back one step in the stack of views and positions."""

self.views[self.figure].back()

self.positions[self.figure].back()

def forward(self):

"""Forward one step in the stack of views and positions."""

self.views[self.figure].forward()

self.positions[self.figure].forward()

class ViewsPositionsBase(ToolBase):

"""Base class for `ToolHome`, `ToolBack` and `ToolForward`."""

_on_trigger = None

def trigger(self, sender, event, data=None):

self.toolmanager.get_tool(_views_positions).add_figure(self.figure)

getattr(self.toolmanager.get_tool(_views_positions),

self._on_trigger)()

self.toolmanager.get_tool(_views_positions).update_view()

class ToolHome(ViewsPositionsBase):

"""Restore the original view limits."""

description = 'Reset original view'

image = 'mpl-data/images/home'

default_keymap = property(lambda self: mpl.rcParams['keymap.home'])

_on_trigger = 'home'

class ToolBack(ViewsPositionsBase):

"""Move back up the view limits stack."""

description = 'Back to previous view'

image = 'mpl-data/images/back'

default_keymap = property(lambda self: mpl.rcParams['keymap.back'])

_on_trigger = 'back'

class ToolForward(ViewsPositionsBase):

"""Move forward in the view lim stack."""

description = 'Forward to next view'

image = 'mpl-data/images/forward'

default_keymap = property(lambda self: mpl.rcParams['keymap.forward'])

_on_trigger = 'forward'

class ConfigureSubplotsBase(ToolBase):

"""Base tool for the configuration of subplots."""

description = 'Configure subplots'

image = 'mpl-data/images/subplots'

class SaveFigureBase(ToolBase):

"""Base tool for figure saving."""

description = 'Save the figure'

image = 'mpl-data/images/filesave'

default_keymap = property(lambda self: mpl.rcParams['keymap.save'])

class ZoomPanBase(ToolToggleBase):

"""Base class for `ToolZoom` and `ToolPan`."""

def __init__(self, *args):

super().__init__(*args)

self._button_pressed = None

self._xypress = None

self._idPress = None

self._idRelease = None

self._idScroll = None

self.base_scale = 2.

self.scrollthresh = .5 # .5 second scroll threshold

self.lastscroll = time.time()-self.scrollthresh

def enable(self, event=None):

"""Connect press/release events and lock the canvas."""

self.figure.canvas.widgetlock(self)

self._idPress = self.figure.canvas.mpl_connect(

'button_press_event', self._press)

self._idRelease = self.figure.canvas.mpl_connect(

'button_release_event', self._release)

self._idScroll = self.figure.canvas.mpl_connect(

'scroll_event', self.scroll_zoom)

def disable(self, event=None):

"""Release the canvas and disconnect press/release events."""

self._cancel_action()

self.figure.canvas.widgetlock.release(self)

self.figure.canvas.mpl_disconnect(self._idPress)

self.figure.canvas.mpl_disconnect(self._idRelease)

self.figure.canvas.mpl_disconnect(self._idScroll)

def trigger(self, sender, event, data=None):

self.toolmanager.get_tool(_views_positions).add_figure(self.figure)

super().trigger(sender, event, data)

def scroll_zoom(self, event):

# https://gist.github.com/tacaswell/3144287

if event.inaxes is None:

return

if event.button == 'up':

# deal with zoom in

scl = self.base_scale

elif event.button == 'down':

# deal with zoom out

scl = 1/self.base_scale

else:

# deal with something that should never happen

scl = 1

ax = event.inaxes

ax._set_view_from_bbox([event.x, event.y, scl])

# If last scroll was done within the timing threshold, delete the

# previous view

if (time.time()-self.lastscroll) < self.scrollthresh:

self.toolmanager.get_tool(_views_positions).back()

self.figure.canvas.draw_idle() # force re-draw

self.lastscroll = time.time()

self.toolmanager.get_tool(_views_positions).push_current()

class ToolZoom(ZoomPanBase):

"""A Tool for zooming using a rectangle selector."""

description = 'Zoom to rectangle'

image = 'mpl-data/images/zoom_to_rect'

default_keymap = property(lambda self: mpl.rcParams['keymap.zoom'])

cursor = cursors.SELECT_REGION

radio_group = 'default'

def __init__(self, *args):

super().__init__(*args)

self._ids_zoom = []

def _cancel_action(self):

for zoom_id in self._ids_zoom:

self.figure.canvas.mpl_disconnect(zoom_id)

self.toolmanager.trigger_tool('rubberband', self)

self.figure.canvas.draw_idle()

self._xypress = None

self._button_pressed = None

self._ids_zoom = []

return

def _press(self, event):

"""Callback for mouse button presses in zoom-to-rectangle mode."""

# If we're already in the middle of a zoom, pressing another

# button works to "cancel"

if self._ids_zoom:

self._cancel_action()

if event.button == 1:

self._button_pressed = 1

elif event.button == 3:

self._button_pressed = 3

else:

self._cancel_action()

return

x, y = event.x, event.y

self._xypress = []

for i, a in enumerate(self.figure.get_axes()):

if (x is not None and y is not None and a.in_axes(event) and

a.get_navigate() and a.can_zoom()):

self._xypress.append((x, y, a, i, a._get_view()))

id1 = self.figure.canvas.mpl_connect(

'motion_notify_event', self._mouse_move)

id2 = self.figure.canvas.mpl_connect(

'key_press_event', self._switch_on_zoom_mode)

id3 = self.figure.canvas.mpl_connect(

'key_release_event', self._switch_off_zoom_mode)

self._ids_zoom = id1, id2, id3

self._zoom_mode = event.key

def _switch_on_zoom_mode(self, event):

self._zoom_mode = event.key

self._mouse_move(event)

def _switch_off_zoom_mode(self, event):

self._zoom_mode = None

self._mouse_move(event)

def _mouse_move(self, event):

"""Callback for mouse moves in zoom-to-rectangle mode."""

if self._xypress:

x, y = event.x, event.y

lastx, lasty, a, ind, view = self._xypress[0]

(x1, y1), (x2, y2) = np.clip(

[[lastx, lasty], [x, y]], a.bbox.min, a.bbox.max)

if self._zoom_mode == "x":

y1, y2 = a.bbox.intervaly

elif self._zoom_mode == "y":

x1, x2 = a.bbox.intervalx

self.toolmanager.trigger_tool(

'rubberband', self, data=(x1, y1, x2, y2))

def _release(self, event):

"""Callback for mouse button releases in zoom-to-rectangle mode."""

for zoom_id in self._ids_zoom:

self.figure.canvas.mpl_disconnect(zoom_id)

self._ids_zoom = []

if not self._xypress:

self._cancel_action()

return

done_ax = []

for cur_xypress in self._xypress:

x, y = event.x, event.y

lastx, lasty, a, _ind, view = cur_xypress

# ignore singular clicks - 5 pixels is a threshold

if abs(x - lastx) < 5 or abs(y - lasty) < 5:

self._cancel_action()

return

# detect twinx, twiny Axes and avoid double zooming

twinx = any(a.get_shared_x_axes().joined(a, a1) for a1 in done_ax)

twiny = any(a.get_shared_y_axes().joined(a, a1) for a1 in done_ax)

done_ax.append(a)

if self._button_pressed == 1:

direction = 'in'

elif self._button_pressed == 3:

direction = 'out'

else:

continue

a._set_view_from_bbox((lastx, lasty, x, y), direction,

self._zoom_mode, twinx, twiny)

self._zoom_mode = None

self.toolmanager.get_tool(_views_positions).push_current()

self._cancel_action()

class ToolPan(ZoomPanBase):

"""Pan Axes with left mouse, zoom with right."""

default_keymap = property(lambda self: mpl.rcParams['keymap.pan'])

description = 'Pan axes with left mouse, zoom with right'

image = 'mpl-data/images/move'

cursor = cursors.MOVE

radio_group = 'default'

def __init__(self, *args):

super().__init__(*args)

self._id_drag = None

def _cancel_action(self):

self._button_pressed = None

self._xypress = []

self.figure.canvas.mpl_disconnect(self._id_drag)

self.toolmanager.messagelock.release(self)

self.figure.canvas.draw_idle()

def _press(self, event):

if event.button == 1:

self._button_pressed = 1

elif event.button == 3:

self._button_pressed = 3

else:

self._cancel_action()

return

x, y = event.x, event.y

self._xypress = []

for i, a in enumerate(self.figure.get_axes()):

if (x is not None and y is not None and a.in_axes(event) and

a.get_navigate() and a.can_pan()):

a.start_pan(x, y, event.button)

self._xypress.append((a, i))

self.toolmanager.messagelock(self)

self._id_drag = self.figure.canvas.mpl_connect(

'motion_notify_event', self._mouse_move)

def _release(self, event):

if self._button_pressed is None:

self._cancel_action()

return

self.figure.canvas.mpl_disconnect(self._id_drag)

self.toolmanager.messagelock.release(self)

for a, _ind in self._xypress:

a.end_pan()

if not self._xypress:

self._cancel_action()

return

self.toolmanager.get_tool(_views_positions).push_current()

self._cancel_action()

def _mouse_move(self, event):

for a, _ind in self._xypress:

# safer to use the recorded button at the _press than current

# button: # multiple button can get pressed during motion...

a.drag_pan(self._button_pressed, event.key, event.x, event.y)

self.toolmanager.canvas.draw_idle()

class ToolHelpBase(ToolBase):

description = 'Print tool list, shortcuts and description'

default_keymap = property(lambda self: mpl.rcParams['keymap.help'])

image = 'mpl-data/images/help'

@staticmethod

def format_shortcut(key_sequence):

"""

Convert a shortcut string from the notation used in rc config to the

standard notation for displaying shortcuts, e.g. 'ctrl+a' -> 'Ctrl+A'.

"""

return (key_sequence if len(key_sequence) == 1 else

re.sub(r"\+[A-Z]", r"+Shift\g<0>", key_sequence).title())

def _format_tool_keymap(self, name):

keymaps = self.toolmanager.get_tool_keymap(name)

return ", ".join(self.format_shortcut(keymap) for keymap in keymaps)

def _get_help_entries(self):

return [(name, self._format_tool_keymap(name), tool.description)

for name, tool in sorted(self.toolmanager.tools.items())

if tool.description]

def _get_help_text(self):

entries = self._get_help_entries()

entries = ["{}: {}\n\t{}".format(*entry) for entry in entries]

return "\n".join(entries)

def _get_help_html(self):

fmt = "<tr><td>{}</td><td>{}</td><td>{}</td></tr>"

rows = [fmt.format(

"<b>Action</b>", "<b>Shortcuts</b>", "<b>Description</b>")]

rows += [fmt.format(*row) for row in self._get_help_entries()]

return ("<style>td {padding: 0px 4px}</style>"

"<table><thead>" + rows[0] + "</thead>"

"<tbody>".join(rows[1:]) + "</tbody></table>")

class ToolCopyToClipboardBase(ToolBase):

"""Tool to copy the figure to the clipboard."""

description = 'Copy the canvas figure to clipboard'

default_keymap = property(lambda self: mpl.rcParams['keymap.copy'])

def trigger(self, *args, **kwargs):

message = "Copy tool is not available"

self.toolmanager.message_event(message, self)

#: The default tools to add to a tool manager.

default_tools = {'home': ToolHome, 'back': ToolBack, 'forward': ToolForward,

'zoom': ToolZoom, 'pan': ToolPan,

'subplots': ConfigureSubplotsBase,

'save': SaveFigureBase,

'grid': ToolGrid,

'grid_minor': ToolMinorGrid,

'fullscreen': ToolFullScreen,

'quit': ToolQuit,

'quit_all': ToolQuitAll,

'xscale': ToolXScale,

'yscale': ToolYScale,

'position': ToolCursorPosition,

_views_positions: ToolViewsPositions,

'cursor': ToolSetCursor,

'rubberband': RubberbandBase,

'help': ToolHelpBase,

'copy': ToolCopyToClipboardBase,

}

#: The default tools to add to a container.

default_toolbar_tools = [['navigation', ['home', 'back', 'forward']],

['zoompan', ['pan', 'zoom', 'subplots']],

['io', ['save', 'help']]]

def add_tools_to_manager(toolmanager, tools=None):

"""

Add multiple tools to a `.ToolManager`.

Parameters

----------

toolmanager : `.backend_managers.ToolManager`

Manager to which the tools are added.

tools : {str: class_like}, optional

The tools to add in a {name: tool} dict, see

`.backend_managers.ToolManager.add_tool` for more info. If not specified, then

defaults to `.default_tools`.

"""

if tools is None:

tools = default_tools

for name, tool in tools.items():

toolmanager.add_tool(name, tool)

def add_tools_to_container(container, tools=None):

"""

Add multiple tools to the container.

Parameters

----------

container : Container

`.backend_bases.ToolContainerBase` object that will get the tools

added.

tools : list, optional

List in the form ``[[group1, [tool1, tool2 ...]], [group2, [...]]]``

where the tools ``[tool1, tool2, ...]`` will display in group1.

See `.backend_bases.ToolContainerBase.add_tool` for details. If not specified,

then defaults to `.default_toolbar_tools`.

"""

if tools is None:

tools = default_toolbar_tools

for group, grouptools in tools:

for position, tool in enumerate(grouptools):

View remainder of file in raw view

matplotlib/lib/matplotlib/backend_tools.py at v3.11.2 · matplotlib/matplotlib · GitHub

Uh oh!

Expand file tree

Breadcrumbs

backend_tools.py

Latest commit

History

Breadcrumbs

backend_tools.py

File metadata and controls