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Deprecate various wx Toolbar attributes.#17292

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Merged
QuLogic merged 1 commit intomatplotlib:masterfromanntzer:wxtoolbarattrs
May 2, 2020
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5 changes: 5 additions & 0 deletionsdoc/api/api_changes_3.3/deprecations.rst
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Expand Up@@ -392,6 +392,11 @@ NavigationToolbar2QT.ctx
~~~~~~~~~~~~~~~~~~~~~~~~
This attribute is deprecated.

NavigationToolbar2Wx attributes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``prevZoomRect``, ``retinaFix``, ``savedRetinaImage``, ``wxoverlay``,
``zoomAxes``, ``zoomStartX``, and ``zoomStartY`` attributes are deprecated.

NavigationToolbar2.press and .release
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These methods were called when pressing or releasing a mouse button,
Expand Down
76 changes: 42 additions & 34 deletionslib/matplotlib/backends/backend_wx.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1126,12 +1126,20 @@ def __init__(self, canvas):

NavigationToolbar2.__init__(self, canvas)
self._idle = True
self.prevZoomRect = None
self._prevZoomRect = None
# for now, use alternate zoom-rectangle drawing on all
# Macs. N.B. In future versions of wx it may be possible to
# detect Retina displays with window.GetContentScaleFactor()
# and/or dc.GetContentScaleFactor()
self.retinaFix = 'wxMac' in wx.PlatformInfo
self._retinaFix = 'wxMac' in wx.PlatformInfo

prevZoomRect = cbook._deprecate_privatize_attribute("3.3")
retinaFix = cbook._deprecate_privatize_attribute("3.3")
savedRetinaImage = cbook._deprecate_privatize_attribute("3.3")
wxoverlay = cbook._deprecate_privatize_attribute("3.3")
zoomAxes = cbook._deprecate_privatize_attribute("3.3")
zoomStartX = cbook._deprecate_privatize_attribute("3.3")
zoomStartY = cbook._deprecate_privatize_attribute("3.3")

def get_canvas(self, frame, fig):
return type(self.canvas)(frame, -1, fig)
Expand DownExpand Up@@ -1201,53 +1209,53 @@ def set_cursor(self, cursor):
def press_zoom(self, event):
super().press_zoom(event)
if self.mode.name == 'ZOOM':
if not self.retinaFix:
self.wxoverlay = wx.Overlay()
if not self._retinaFix:
self._wxoverlay = wx.Overlay()
else:
if event.inaxes is not None:
self.savedRetinaImage = self.canvas.copy_from_bbox(
self._savedRetinaImage = self.canvas.copy_from_bbox(
event.inaxes.bbox)
self.zoomStartX = event.xdata
self.zoomStartY = event.ydata
self.zoomAxes = event.inaxes
self._zoomStartX = event.xdata
self._zoomStartY = event.ydata
self._zoomAxes = event.inaxes

def release_zoom(self, event):
super().release_zoom(event)
if self.mode.name == 'ZOOM':
# When the mouse is released we reset the overlay and it
# restores the former content to the window.
if not self.retinaFix:
self.wxoverlay.Reset()
del self.wxoverlay
if not self._retinaFix:
self._wxoverlay.Reset()
del self._wxoverlay
else:
del self.savedRetinaImage
if self.prevZoomRect:
self.prevZoomRect.pop(0).remove()
self.prevZoomRect = None
if self.zoomAxes:
self.zoomAxes = None
del self._savedRetinaImage
if self._prevZoomRect:
self._prevZoomRect.pop(0).remove()
self._prevZoomRect = None
if self._zoomAxes:
self._zoomAxes = None

def draw_rubberband(self, event, x0, y0, x1, y1):
if self.retinaFix: # On Macs, use the following code
if self._retinaFix: # On Macs, use the following code
# wx.DCOverlay does not work properly on Retina displays.
rubberBandColor = '#C0C0FF'
if self.prevZoomRect:
self.prevZoomRect.pop(0).remove()
self.canvas.restore_region(self.savedRetinaImage)
X0, X1 = self.zoomStartX, event.xdata
Y0, Y1 = self.zoomStartY, event.ydata
if self._prevZoomRect:
self._prevZoomRect.pop(0).remove()
self.canvas.restore_region(self._savedRetinaImage)
X0, X1 = self._zoomStartX, event.xdata
Y0, Y1 = self._zoomStartY, event.ydata
lineX = (X0, X0, X1, X1, X0)
lineY = (Y0, Y1, Y1, Y0, Y0)
self.prevZoomRect = self.zoomAxes.plot(
self._prevZoomRect = self._zoomAxes.plot(
lineX, lineY, '-', color=rubberBandColor)
self.zoomAxes.draw_artist(self.prevZoomRect[0])
self.canvas.blit(self.zoomAxes.bbox)
self._zoomAxes.draw_artist(self._prevZoomRect[0])
self.canvas.blit(self._zoomAxes.bbox)
return

# Use an Overlay to draw a rubberband-like bounding box.

dc = wx.ClientDC(self.canvas)
odc = wx.DCOverlay(self.wxoverlay, dc)
odc = wx.DCOverlay(self._wxoverlay, dc)
odc.Clear()

# Mac's DC is already the same as a GCDC, and it causes
Expand DownExpand Up@@ -1439,14 +1447,14 @@ def set_cursor(self, cursor):
class RubberbandWx(backend_tools.RubberbandBase):
def __init__(self, *args, **kwargs):
backend_tools.RubberbandBase.__init__(self, *args, **kwargs)
self.wxoverlay = None
self._wxoverlay = None

def draw_rubberband(self, x0, y0, x1, y1):
# Use an Overlay to draw a rubberband-like bounding box.
if self.wxoverlay is None:
self.wxoverlay = wx.Overlay()
if self._wxoverlay is None:
self._wxoverlay = wx.Overlay()
dc = wx.ClientDC(self.canvas)
odc = wx.DCOverlay(self.wxoverlay, dc)
odc = wx.DCOverlay(self._wxoverlay, dc)
odc.Clear()

dc = wx.GCDC(dc)
Expand DownExpand Up@@ -1477,10 +1485,10 @@ def draw_rubberband(self, x0, y0, x1, y1):
dc.DrawRectangle(rect)

def remove_rubberband(self):
if self.wxoverlay is None:
if self._wxoverlay is None:
return
self.wxoverlay.Reset()
self.wxoverlay = None
self._wxoverlay.Reset()
self._wxoverlay = None

else:
# on Mac OS retina displays DCOverlay does not work
Expand Down
2 changes: 1 addition & 1 deletionlib/matplotlib/cbook/__init__.py
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Expand Up@@ -31,7 +31,7 @@
from .deprecation import (
deprecated, warn_deprecated,
_rename_parameter, _delete_parameter, _make_keyword_only,
_deprecate_method_override,
_deprecate_method_override, _deprecate_privatize_attribute,
_suppress_matplotlib_deprecation_warning,
MatplotlibDeprecationWarning, mplDeprecation)

Expand Down
23 changes: 23 additions & 0 deletionslib/matplotlib/cbook/deprecation.py
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Expand Up@@ -251,6 +251,29 @@ def wrapper(*args, **kwargs):
return deprecate


class _deprecate_privatize_attribute:
"""
Helper to deprecate public access to an attribute.

This helper should only be used at class scope, as follows::

class Foo:
attr = _deprecate_privatize_attribute(*args, **kwargs)

where *all* parameters are forwarded to `deprecated`. This form makes
``attr`` a property which forwards access to ``self._attr`` (same name but
with a leading underscore), with a deprecation warning. Note that the
attribute name is derived from *the name this helper is assigned to*.
"""

def __init__(self, *args, **kwargs):
self.deprecator = deprecated(*args, **kwargs)

def __set_name__(self, owner, name):
setattr(owner, name, self.deprecator(
property(lambda self: getattr(self, f"_{name}")), name=name))


def _rename_parameter(since, old, new, func=None):
"""
Decorator indicating that parameter *old* of *func* is renamed to *new*.
Expand Down
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