/usr/share/mypaint/gui/tileddrawwidget.py is in mypaint 1.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 | # This file is part of MyPaint.
# Copyright (C) 2008 by Martin Renold <martinxyz@gmx.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
import gtk, gobject, cairo, random
gdk = gtk.gdk
from math import floor, ceil, pi, log
from numpy import isfinite
from warnings import warn
from lib import helpers, tiledsurface, pixbufsurface
import cursor
def _make_testbed_model():
warn("Creating standalone model for testing", RuntimeWarning, 2)
import lib.brush, lib.document
brush = lib.brush.BrushInfo()
brush.load_defaults()
return lib.document.Document(brush)
class TiledDrawWidget(gtk.DrawingArea):
"""
This widget displays a document (../lib/document*.py).
It can show the document translated, rotated or zoomed. It does
not respond to user input except for painting. Painting events are
passed to the document after applying the inverse transformation.
"""
# Register a GType name for Glade, GtkBuilder etc.
__gtype_name__ = "TiledDrawWidget"
CANNOT_DRAW_CURSOR = gdk.Cursor(gdk.CIRCLE)
def __init__(self, app=None, document=None):
gtk.DrawingArea.__init__(self)
self.connect("expose-event", self.expose_cb)
self.connect("enter-notify-event", self.enter_notify_cb)
self.connect("leave-notify-event", self.leave_notify_cb)
self.connect("size-allocate", self.size_allocate_cb)
self.connect("state-changed", self.state_changed_cb)
# workaround for https://gna.org/bugs/?14372 ([Windows] crash when moving the pen during startup)
def at_application_start(*junk):
self.connect("motion-notify-event", self.motion_notify_cb)
self.connect("button-press-event", self.button_press_cb)
self.connect("button-release-event", self.button_release_cb)
gobject.idle_add(at_application_start)
self.set_events(gdk.EXPOSURE_MASK
| gdk.POINTER_MOTION_MASK
| gdk.ENTER_NOTIFY_MASK
| gdk.LEAVE_NOTIFY_MASK
# Workaround for https://gna.org/bugs/index.php?16253
# Mypaint doesn't use proximity-*-event for anything
# yet, but this seems to be needed for scrollwheels
# etc. to keep working.
| gdk.PROXIMITY_OUT_MASK
| gdk.PROXIMITY_IN_MASK
# for some reason we also need to specify events handled in drawwindow.py:
| gdk.BUTTON_PRESS_MASK
| gdk.BUTTON_RELEASE_MASK
)
self.set_extension_events (gdk.EXTENSION_EVENTS_ALL)
self.app = app
if document is None:
document = _make_testbed_model()
self.doc = document
self.doc.canvas_observers.append(self.canvas_modified_cb)
self.doc.brush.brushinfo.observers.append(self.brush_modified_cb)
self.cursor_info = None
self.last_event_time = None
self.last_event_x = None
self.last_event_y = None
self.last_event_device = None
self.last_event_had_pressure_info = False
self.last_painting_pos = None
self.device_observers = [] #: Notified during drawing when input devices change
self._input_stroke_ended_observers = [] #: Access via gui.document
self.visualize_rendering = False
self.translation_x = 0.0
self.translation_y = 0.0
self.scale = 1.0
self.rotation = 0.0
self.mirrored = False
self.has_pointer = False
self.dragfunc = None
self.current_layer_solo = False
self.show_layers_above = True
self.overlay_layer = None
# gets overwritten for the main window
self.zoom_max = 5.0
self.zoom_min = 1/5.0
#self.scroll_at_edges = False
self.pressure_mapping = None
self.bad_devices = []
self.motions = []
# Sensitivity; we draw via a cached snapshot while the widget is
# insensitive. tdws are generally only insensitive during loading and
# saving, and because we now process the GTK main loop during loading
# and saving, we need to avoid drawing partially-loaded files.
self.is_sensitive = True # just mirrors gtk.STATE_INSENSITIVE
self.snapshot_pixmap = None
self.override_cursor = None
#def set_scroll_at_edges(self, choice):
# self.scroll_at_edges = choice
def state_changed_cb(self, widget, oldstate):
# Keeps track of the sensitivity state, and regenerates
# the snapshot pixbuf on entering it.
sensitive = self.get_state() != gtk.STATE_INSENSITIVE
if sensitive:
self.snapshot_pixmap = None
else:
if self.snapshot_pixmap is None:
self.snapshot_pixmap = self.get_snapshot()
self.is_sensitive = sensitive
def enter_notify_cb(self, widget, event):
self.has_pointer = True
def leave_notify_cb(self, widget, event):
self.has_pointer = False
def size_allocate_cb(self, widget, allocation):
old_alloc = getattr(self, 'stored_allocation', allocation)
if old_alloc != allocation:
dx = allocation.x - old_alloc.x
dy = allocation.y - old_alloc.y
self.scroll(dx, dy)
self.stored_allocation = allocation
def device_used(self, device):
"""Tell the TDW about a device being used."""
if device == self.last_event_device:
return True
for func in self.device_observers:
func(self.last_event_device, device)
self.last_event_device = device
return False
# Do not interpolate between motion events from different
# devices. If the final pressure value from the previous
# device was not 0.0, the motion event of the new device could
# cause a visible stroke, even if pressure is 0.0.
self.doc.brush.reset()
def motion_notify_cb(self, widget, event, button1_pressed=None):
if not self.is_sensitive:
return
if self.last_event_time:
dtime = (event.time - self.last_event_time)/1000.0
dx = event.x - self.last_event_x
dy = event.y - self.last_event_y
else:
dtime = None
self.last_event_x = event.x
self.last_event_y = event.y
self.last_event_time = event.time
if dtime is None:
return
same_device = self.device_used(event.device)
if self.dragfunc:
self.dragfunc(dx, dy, event.x, event.y)
return
# Refuse drawing if the layer is locked or hidden
if self.doc.layer.locked or not self.doc.layer.visible:
return
# TODO: some feedback, maybe
cr = self.get_model_coordinates_cairo_context()
x, y = cr.device_to_user(event.x, event.y)
pressure = event.get_axis(gdk.AXIS_PRESSURE)
if pressure is not None and (pressure > 1.0 or pressure < 0.0 or not isfinite(pressure)):
if event.device.name not in self.bad_devices:
print 'WARNING: device "%s" is reporting bad pressure %+f' % (event.device.name, pressure)
self.bad_devices.append(event.device.name)
if not isfinite(pressure):
# infinity/nan: use button state (instead of clamping in brush.hpp)
# https://gna.org/bugs/?14709
pressure = None
if pressure is None:
self.last_event_had_pressure_info = False
if button1_pressed is None:
button1_pressed = event.state & gdk.BUTTON1_MASK
if button1_pressed:
pressure = 0.5
else:
pressure = 0.0
else:
self.last_event_had_pressure_info = True
xtilt = event.get_axis(gdk.AXIS_XTILT)
ytilt = event.get_axis(gdk.AXIS_YTILT)
# Check whether tilt is present. For some tablets without
# tilt support GTK reports a tilt axis with value nan, instead
# of None. https://gna.org/bugs/?17084
if xtilt is None or ytilt is None or not isfinite(xtilt+ytilt):
xtilt = 0.0
ytilt = 0.0
if event.state & gdk.CONTROL_MASK or event.state & gdk.MOD1_MASK:
# color picking, do not paint
# Don't simply return; this is a workaround for unwanted lines in https://gna.org/bugs/?16169
pressure = 0.0
### CSS experimental - scroll when touching the edge of the screen in fullscreen mode
#
# Disabled for the following reasons:
# - causes irritation when doing fast strokes near the edge
# - scrolling speed depends on the number of events received (can be a huge difference between tablets/mouse)
# - also, mouse button scrolling is usually enough
#
#if self.scroll_at_edges and pressure <= 0.0:
# screen_w = gdk.screen_width()
# screen_h = gdk.screen_height()
# trigger_area = 10
# if (event.x <= trigger_area):
# self.scroll(-10,0)
# if (event.x >= (screen_w-1)-trigger_area):
# self.scroll(10,0)
# if (event.y <= trigger_area):
# self.scroll(0,-10)
# if (event.y >= (screen_h-1)-trigger_area):
# self.scroll(0,10)
if self.pressure_mapping:
pressure = self.pressure_mapping(pressure)
if event.state & gdk.SHIFT_MASK:
pressure = 0.0
if pressure:
self.last_painting_pos = x, y
# If the device has changed and the last pressure value from the previous device
# is not equal to 0.0, this can leave a visible stroke on the layer even if the 'new'
# device is not pressed on the tablet and has a pressure axis == 0.0.
# Reseting the brush when the device changes fixes this issue, but there may be a
# much more elegant solution that only resets the brush on this edge-case.
if not same_device:
self.doc.brush.reset()
# On Windows, GTK timestamps have a resolution around
# 15ms, but tablet events arrive every 8ms.
# https://gna.org/bugs/index.php?16569
# TODO: proper fix in the brush engine, using only smooth,
# filtered speed inputs, will make this unneccessary
if dtime < 0.0:
print 'Time is running backwards, dtime=%f' % dtime
dtime = 0.0
data = (x, y, pressure, xtilt, ytilt)
if dtime == 0.0:
self.motions.append(data)
elif dtime > 0.0:
if self.motions:
# replay previous events that had identical timestamp
if dtime > 0.1:
# really old events, don't associate them with the new one
step = 0.1
else:
step = dtime
step /= len(self.motions)+1
for data_old in self.motions:
self.doc.stroke_to(step, *data_old)
dtime -= step
self.motions = []
self.doc.stroke_to(dtime, *data)
def button_press_cb(self, win, event):
if event.type != gdk.BUTTON_PRESS:
# ignore the extra double-click event
return
if event.button == 1:
# mouse button pressed (while painting without pressure information)
if not self.last_event_had_pressure_info:
# For the mouse we don't get a motion event for "pressure"
# changes, so we simulate it. (Note: we can't use the
# event's button state because it carries the old state.)
self.motion_notify_cb(win, event, button1_pressed=True)
def button_release_cb(self, win, event):
# (see comment above in button_press_cb)
if event.button == 1 and not self.last_event_had_pressure_info:
self.motion_notify_cb(win, event, button1_pressed=False)
# Outsiders can access this via gui.document
for func in self._input_stroke_ended_observers:
func(event)
def straight_line_from_last_pos(self, is_sequence=False):
if not self.last_painting_pos:
return
dst = self.get_cursor_in_model_coordinates()
self.doc.straight_line(self.last_painting_pos, dst)
if is_sequence:
self.last_painting_pos = dst
def canvas_modified_cb(self, x1, y1, w, h):
if not self.window:
return
if w == 0 and h == 0:
# full redraw (used when background has changed)
#print 'full redraw'
self.queue_draw()
return
cr = self.get_model_coordinates_cairo_context()
if self.is_translation_only():
x, y = cr.user_to_device(x1, y1)
self.queue_draw_area(int(x), int(y), w, h)
else:
# create an expose event with the event bbox rotated/zoomed
# OPTIMIZE: this is estimated to cause at least twice more rendering work than neccessary
# transform 4 bbox corners to screen coordinates
corners = [(x1, y1), (x1+w-1, y1), (x1, y1+h-1), (x1+w-1, y1+h-1)]
corners = [cr.user_to_device(x, y) for (x, y) in corners]
self.queue_draw_area(*helpers.rotated_rectangle_bbox(corners))
def expose_cb(self, widget, event):
self.update_cursor() # hack to get the initial cursor right
if self.snapshot_pixmap:
gc = self.get_style().fg_gc[self.get_state()]
area = event.area
x,y,w,h = area.x, area.y, area.width, area.height
self.window.draw_drawable(gc, self.snapshot_pixmap, x,y, x,y, w,h)
else:
self.repaint(event.area)
return True
def get_model_coordinates_cairo_context(self, cr=None):
# OPTIMIZE: check whether this is a bottleneck during painting (many motion events) - if yes, use cache
if cr is None:
cr = self.window.cairo_create()
scale = self.scale
# check if scale is almost a power of two
scale_log2 = log(scale, 2)
scale_log2_rounded = round(scale_log2)
if abs(scale_log2-scale_log2_rounded) < 0.01:
scale = 2.0**scale_log2_rounded
rotation = self.rotation # maybe we should check if rotation is almost a multiple of 90 degrees?
cr.translate(self.translation_x, self.translation_y)
cr.rotate(rotation)
cr.scale(scale, scale)
# Align the translation such that (0,0) maps to an integer
# screen pixel, to keep image rendering fast and sharp.
x, y = cr.user_to_device(0, 0)
x, y = cr.device_to_user(round(x), round(y))
cr.translate(x, y)
if self.mirrored:
m = list(cr.get_matrix())
m[0] = -m[0]
m[2] = -m[2]
cr.set_matrix(cairo.Matrix(*m))
return cr
def is_translation_only(self):
return self.rotation == 0.0 and self.scale == 1.0 and not self.mirrored
def get_cursor_in_model_coordinates(self):
x, y, modifiers = self.window.get_pointer()
cr = self.get_model_coordinates_cairo_context()
return cr.device_to_user(x, y)
def get_visible_layers(self):
# FIXME: tileddrawwidget should not need to know whether the document has layers
layers = self.doc.layers
if not self.show_layers_above:
layers = self.doc.layers[0:self.doc.layer_idx+1]
layers = [l for l in layers if l.visible]
return layers
def repaint(self, device_bbox=None):
cr, surface, sparse, mipmap_level, gdk_clip_region = self.render_prepare(device_bbox)
self.render_execute(cr, surface, sparse, mipmap_level, gdk_clip_region)
def render_prepare(self, device_bbox):
if device_bbox is None:
w, h = self.window.get_size()
device_bbox = (0, 0, w, h)
#print 'device bbox', tuple(device_bbox)
gdk_clip_region = self.window.get_clip_region()
x, y, w, h = device_bbox
sparse = not gdk_clip_region.point_in(x+w/2, y+h/2)
cr = self.window.cairo_create()
# actually this is only neccessary if we are not answering an expose event
cr.rectangle(*device_bbox)
cr.clip()
# fill it all white, though not required in the most common case
if self.visualize_rendering:
# grey
tmp = random.random()
cr.set_source_rgb(tmp, tmp, tmp)
cr.paint()
# bye bye device coordinates
self.get_model_coordinates_cairo_context(cr)
# choose best mipmap
hq_zoom = False
if self.app and self.app.preferences['view.high_quality_zoom']:
hq_zoom = True
if hq_zoom:
# can cause a very clear slowdown on some hardware
# (we probably could avoid this by doing rendering differently)
mipmap_level = max(0, int(floor(log(1.0/self.scale,2))))
else:
mipmap_level = max(0, int(ceil(log(1/self.scale,2))))
# OPTIMIZE: if we would render tile scanlines, we could probably use the better one above...
mipmap_level = min(mipmap_level, tiledsurface.MAX_MIPMAP_LEVEL)
cr.scale(2**mipmap_level, 2**mipmap_level)
translation_only = self.is_translation_only()
# calculate the final model bbox with all the clipping above
x1, y1, x2, y2 = cr.clip_extents()
if not translation_only:
# Looks like cairo needs one extra pixel rendered for interpolation at the border.
# If we don't do this, we get dark stripe artefacts when panning while zoomed.
x1 -= 1
y1 -= 1
x2 += 1
y2 += 1
x1, y1 = int(floor(x1)), int(floor(y1))
x2, y2 = int(ceil (x2)), int(ceil (y2))
# alpha=True is just to get hardware acceleration, we don't
# actually use the alpha channel. Speedup factor 3 for
# ATI/Radeon Xorg driver (and hopefully others).
# https://bugs.freedesktop.org/show_bug.cgi?id=28670
surface = pixbufsurface.Surface(x1, y1, x2-x1+1, y2-y1+1, alpha=True)
del x1, y1, x2, y2, w, h
return cr, surface, sparse, mipmap_level, gdk_clip_region
def render_execute(self, cr, surface, sparse, mipmap_level, gdk_clip_region):
translation_only = self.is_translation_only()
model_bbox = surface.x, surface.y, surface.w, surface.h
#print 'model bbox', model_bbox
# not sure if it is a good idea to clip so tightly
# has no effect right now because device_bbox is always smaller
cr.rectangle(*model_bbox)
cr.clip()
layers = self.get_visible_layers()
if self.visualize_rendering:
surface.pixbuf.fill((int(random.random()*0xff)<<16)+0x00000000)
tiles = surface.get_tiles()
background = None
if self.current_layer_solo:
background = self.neutral_background_pixbuf
layers = [self.doc.layer]
# this is for hiding instead
#layers.pop(self.doc.layer_idx)
if self.overlay_layer:
idx = layers.index(self.doc.layer)
layers.insert(idx+1, self.overlay_layer)
for tx, ty in tiles:
if sparse:
# it is worth checking whether this tile really will be visible
# (to speed up the L-shaped expose event during scrolling)
# (speedup clearly visible; slowdown measurable when always executing this code)
N = tiledsurface.N
if translation_only:
x, y = cr.user_to_device(tx*N, ty*N)
bbox = (int(x), int(y), N, N)
else:
#corners = [(tx*N, ty*N), ((tx+1)*N-1, ty*N), (tx*N, (ty+1)*N-1), ((tx+1)*N-1, (ty+1)*N-1)]
# same problem as above: cairo needs to know one extra pixel for interpolation
corners = [(tx*N-1, ty*N-1), ((tx+1)*N, ty*N-1), (tx*N-1, (ty+1)*N), ((tx+1)*N, (ty+1)*N)]
corners = [cr.user_to_device(x_, y_) for (x_, y_) in corners]
bbox = gdk.Rectangle(*helpers.rotated_rectangle_bbox(corners))
if gdk_clip_region.rect_in(bbox) == gdk.OVERLAP_RECTANGLE_OUT:
continue
dst = surface.get_tile_memory(tx, ty)
self.doc.blit_tile_into(dst, tx, ty, mipmap_level, layers, background)
if translation_only:
# not sure why, but using gdk directly is notably faster than the same via cairo
x, y = cr.user_to_device(surface.x, surface.y)
self.window.draw_pixbuf(None, surface.pixbuf, 0, 0, int(x), int(y), dither=gdk.RGB_DITHER_MAX)
else:
#print 'Position (screen coordinates):', cr.user_to_device(surface.x, surface.y)
cr.set_source_pixbuf(surface.pixbuf, round(surface.x), round(surface.y))
pattern = cr.get_source()
# We could set interpolation mode here (eg nearest neighbour)
#pattern.set_filter(cairo.FILTER_NEAREST) # 1.6s
#pattern.set_filter(cairo.FILTER_FAST) # 2.0s
#pattern.set_filter(cairo.FILTER_GOOD) # 3.1s
#pattern.set_filter(cairo.FILTER_BEST) # 3.1s
#pattern.set_filter(cairo.FILTER_BILINEAR) # 3.1s
if self.scale > 3.0:
# pixelize at high zoom-in levels
pattern.set_filter(cairo.FILTER_NEAREST)
cr.paint()
if self.doc.frame_enabled:
# Draw a semi-transparent black overlay for
# all the area outside the "document area"
cr.save()
cr.set_source_rgba(0, 0, 0, 0.6)
cr.set_operator(cairo.OPERATOR_OVER)
mipmap_factor = 2**mipmap_level
frame = self.doc.get_frame()
cr.rectangle(frame[0]/mipmap_factor, frame[1]/mipmap_factor,
frame[2]/mipmap_factor, frame[3]/mipmap_factor)
cr.rectangle(*model_bbox)
cr.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
cr.fill()
cr.restore()
if self.visualize_rendering:
# visualize painted bboxes (blue)
cr.set_source_rgba(0, 0, random.random(), 0.4)
cr.paint()
def scroll(self, dx, dy):
self.translation_x -= dx
self.translation_y -= dy
if False:
# This speeds things up nicely when scrolling is already
# fast, but produces temporary artefacts and an
# annoyingliy non-constant framerate otherwise.
#
# It might be worth it if it was done only once per
# redraw, instead of once per motion event. Maybe try to
# implement something like "queue_scroll" with priority
# similar to redraw?
self.window.scroll(int(-dx), int(-dy))
else:
self.queue_draw()
def get_center(self):
w, h = self.window.get_size()
return w/2.0, h/2.0
def rotozoom_with_center(self, function, at_pointer=False):
if at_pointer and self.has_pointer and self.last_event_x is not None:
cx, cy = self.last_event_x, self.last_event_y
else:
w, h = self.window.get_size()
cx, cy = self.get_center()
cr = self.get_model_coordinates_cairo_context()
cx_device, cy_device = cr.device_to_user(cx, cy)
function()
self.scale = helpers.clamp(self.scale, self.zoom_min, self.zoom_max)
cr = self.get_model_coordinates_cairo_context()
cx_new, cy_new = cr.user_to_device(cx_device, cy_device)
self.translation_x += cx - cx_new
self.translation_y += cy - cy_new
self.queue_draw()
def zoom(self, zoom_step):
def f(): self.scale *= zoom_step
self.rotozoom_with_center(f, at_pointer=True)
def set_zoom(self, zoom):
def f(): self.scale = zoom
self.rotozoom_with_center(f, at_pointer=True)
def rotate(self, angle_step):
if self.mirrored: angle_step = -angle_step
def f(): self.rotation += angle_step
self.rotozoom_with_center(f)
def set_rotation(self, angle):
if self.mirrored: angle = -angle
def f(): self.rotation = angle
self.rotozoom_with_center(f)
def mirror(self):
def f(): self.mirrored = not self.mirrored
self.rotozoom_with_center(f)
def set_mirrored(self, mirrored):
def f(): self.mirrored = mirrored
self.rotozoom_with_center(f)
def start_drag(self, dragfunc):
self.dragfunc = dragfunc
def stop_drag(self, dragfunc):
if self.dragfunc == dragfunc:
self.dragfunc = None
def recenter_document(self):
x, y, w, h = self.doc.get_effective_bbox()
desired_cx_user = x+w/2
desired_cy_user = y+h/2
cr = self.get_model_coordinates_cairo_context()
w, h = self.window.get_size()
cx_user, cy_user = cr.device_to_user(w/2, h/2)
self.translation_x += (cx_user - desired_cx_user)*self.scale
self.translation_y += (cy_user - desired_cy_user)*self.scale
self.queue_draw()
def brush_modified_cb(self, settings):
self.update_cursor()
def update_cursor(self):
if not self.window:
return
elif self.override_cursor is not None:
c = self.override_cursor
elif not self.is_sensitive:
c = None
elif self.doc.layer.locked or not self.doc.layer.visible:
c = self.CANNOT_DRAW_CURSOR
else:
b = self.doc.brush.brushinfo
radius = b.get_effective_radius()*self.scale
c = cursor.get_brush_cursor(radius, b.is_eraser(), b.get_base_value('lock_alpha') > 0.9)
self.window.set_cursor(c)
def set_override_cursor(self, cursor):
"""Set a cursor which will always be used.
Used by the colour picker. The override cursor will be used regardless
of the criteria update_cursor() normally uses. Pass None to let it
choose normally again.
"""
self.override_cursor = cursor
self.update_cursor()
def toggle_show_layers_above(self):
self.show_layers_above = not self.show_layers_above
self.queue_draw()
if __name__ == '__main__':
tdw = TiledDrawWidget()
tdw.set_size_request(640, 480)
win = gtk.Window()
win.set_title("tdw test")
win.connect("destroy", lambda *a: gtk.main_quit())
win.add(tdw)
win.show_all()
gtk.main()
|