def _do_init(self) -> Gtk.Widget:
self._widget = Gtk.Grid(row_spacing=10, column_spacing=10)
file_chooser_lbl = Gtk.Label('Image files:', xalign=0)
self._widget.attach(file_chooser_lbl, 0, 0, 1, 1)
self._file_chooser_inp = FileChooserButton(
file_filter=self._FILE_INPUT_FILTER,
select_multiple=True
)
self._file_chooser_inp.get_style_context().add_class('small-pad')
self._widget.attach_next_to(self._file_chooser_inp, file_chooser_lbl, Gtk.PositionType.RIGHT, 1, 1)
frame_interval_lbl = Gtk.Label('Frame interval (s):')
self._widget.attach(frame_interval_lbl, 0, 1, 1, 1)
frame_interval_inp_container = Gtk.Grid()
self._widget.attach_next_to(frame_interval_inp_container, frame_interval_lbl, Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_inp = FloatEntry(lower=0, width_chars=6, invisible_char='\0', caps_lock_warning=False)
self._frame_interval_inp.get_style_context().add_class('small-pad')
frame_interval_inp_container.add(self._frame_interval_inp)
# Error message labels
self._file_chooser_err_msg_lbl = Gtk.Label(xalign=0)
self._file_chooser_err_msg_lbl.get_style_context().add_class('error-text')
self._widget.attach_next_to(self._file_chooser_err_msg_lbl, self._file_chooser_inp, Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_err_msg_lbl = Gtk.Label(xalign=0)
self._frame_interval_err_msg_lbl.get_style_context().add_class('error-text')
self._widget.attach_next_to(self._frame_interval_err_msg_lbl, frame_interval_inp_container, Gtk.PositionType.RIGHT, 1, 1)
self._widget.show_all()
self._frame_interval_inp.bind_property(
'sensitive',
self._frame_interval_inp,
'visibility',
GObject.BindingFlags.SYNC_CREATE
)
self.bn_selected_image_paths = GObjectPropertyBindable(self._file_chooser_inp, 'file-paths')
self.bn_frame_interval = GObjectPropertyBindable(self._frame_interval_inp, 'value')
self.bn_frame_interval_sensitive = GObjectPropertyBindable(self._frame_interval_inp, 'sensitive')
# Set which widget is first focused
self._file_chooser_inp.grab_focus()
self.presenter.view_ready()
return self._widget
def _do_init(self, view_context: ImageProcessorPluginViewContext) -> None:
self._view_context = view_context
self._tool_ref = self._view_context.get_tool_item(
ToolID.FOREGROUND_DETECTION)
self.bn_tool_button_is_active = self._tool_ref.bn_is_active
self._button_body = Gtk.Grid(hexpand=True, vexpand=True)
self._tool_ref.button_interior.add(self._button_body)
button_lbl = Gtk.Label(
label="Foreground detection",
vexpand=True,
valign=Gtk.Align.CENTER,
)
self._button_body.add(button_lbl)
self._button_body.show_all()
self._popover = Gtk.Popover(
relative_to=self._button_body,
modal=False,
)
# Prevent the popover from being dismissed by the user clicking on it.
self._popover.connect('button-release-event', lambda *_: True)
popover_body = Gtk.Grid(
margin=10,
row_spacing=10,
column_spacing=10,
width_request=250,
)
self._popover.add(popover_body)
thresh_inp = Gtk.Adjustment(value=255, lower=1, upper=255)
thresh_lbl = Gtk.Label('Threshold:', halign=Gtk.Align.START)
popover_body.attach(thresh_lbl, 0, 0, 1, 1)
thresh_scl = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL,
adjustment=thresh_inp,
hexpand=True,
draw_value=False)
thresh_scl.get_style_context().add_class('small-pad')
thresh_scl.get_style_context().add_provider(
self._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
thresh_scl.show()
popover_body.attach(thresh_scl, 1, 0, 1, 1)
thresh_ety = FloatEntry(width_chars=5, xalign=0)
thresh_ety.get_style_context().add_class('small-pad')
thresh_ety.get_style_context().add_provider(
self._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
thresh_ety.show()
popover_body.attach(thresh_ety, 2, 0, 1, 1)
# Bind the properties of Gtk.Adjustment to the Gtk.Entry widget.
for (src, targ), prop in itertools.product(
((thresh_inp, thresh_ety), ), ('value', 'lower', 'upper')):
src.bind_property(
prop, # source_property
targ,
prop, # target, target_property
GObject.BindingFlags.BIDIRECTIONAL # flags
| GObject.BindingFlags.SYNC_CREATE,
lambda _, v: round(v, 1), # transform_to
lambda _, v: v # transform_from
)
self.bn_thresh = GObjectPropertyBindable(
g_obj=thresh_inp,
prop_name='value',
)
popover_body.show_all()
self.presenter.view_ready()
def _do_init(self) -> Gtk.Widget:
self._change_camera_dialog_cid = None # type: Any
self._widget = Gtk.Grid(row_spacing=10, column_spacing=10)
# Populate self.widget
camera_container = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL,
spacing=5)
self._widget.attach(camera_container, 0, 0, 2, 1)
camera_lbl = Gtk.Label('Camera:', xalign=0)
camera_container.add(camera_lbl)
self._current_camera_lbl = Gtk.Label(xalign=0)
camera_container.add(self._current_camera_lbl)
self._change_camera_btn = Gtk.Button('Connect camera')
self._change_camera_btn.get_style_context().add_class('small-pad')
camera_container.add(self._change_camera_btn)
num_frames_lbl = Gtk.Label('Number of images to capture:', xalign=0)
self._widget.attach(num_frames_lbl, 0, 1, 1, 1)
num_frames_inp_container = Gtk.Grid()
self._widget.attach_next_to(num_frames_inp_container, num_frames_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._num_frames_inp = IntegerEntry(lower=1,
upper=200,
value=1,
width_chars=6)
self._num_frames_inp.get_style_context().add_class('small-pad')
num_frames_inp_container.add(self._num_frames_inp)
frame_interval_lbl = Gtk.Label('Frame interval (s):', xalign=0)
self._widget.attach(frame_interval_lbl, 0, 2, 1, 1)
frame_interval_inp_container = Gtk.Grid()
self._widget.attach_next_to(frame_interval_inp_container,
frame_interval_lbl, Gtk.PositionType.RIGHT,
1, 1)
self._frame_interval_inp = FloatEntry(lower=0,
width_chars=6,
sensitive=False,
invisible_char='\0')
self._frame_interval_inp.get_style_context().add_class('small-pad')
frame_interval_inp_container.add(self._frame_interval_inp)
self._current_camera_err_msg_lbl = Gtk.Label(xalign=0)
self._current_camera_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._current_camera_err_msg_lbl,
camera_container, Gtk.PositionType.RIGHT,
1, 1)
self._num_frames_err_msg_lbl = Gtk.Label(xalign=0)
self._num_frames_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._num_frames_err_msg_lbl,
num_frames_inp_container,
Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_err_msg_lbl = Gtk.Label(xalign=0)
self._frame_interval_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._frame_interval_err_msg_lbl,
frame_interval_inp_container,
Gtk.PositionType.RIGHT, 1, 1)
self._widget.show_all()
# Wiring things up
self._change_camera_btn.connect(
'clicked',
lambda *_: self.presenter.hdl_change_camera_btn_clicked())
self.bn_frame_interval = GObjectPropertyBindable(
self._frame_interval_inp, 'value')
self.bn_num_frames = GObjectPropertyBindable(self._num_frames_inp,
'value')
self.bn_frame_interval_sensitive = GObjectPropertyBindable(
self._frame_interval_inp, 'sensitive')
self._frame_interval_inp.bind_property(
'sensitive', self._frame_interval_inp, 'visibility',
GObject.BindingFlags.SYNC_CREATE)
self.presenter.view_ready()
return self._widget
class USBCameraView(View['USBCameraPresenter', Gtk.Widget]):
STYLE = '''
.change-cam-dialog-view-footer {
background-color: gainsboro;
}
.small-pad {
min-height: 0px;
min-width: 0px;
padding: 6px 4px 6px 4px;
}
.dialog-footer-button {
min-height: 0px;
min-width: 0px;
padding: 8px 6px 8px 6px;
}
.error {
color: red;
border: 1px solid red;
}
.error-text {
color: red;
}
'''
_STYLE_PROV = Gtk.CssProvider()
_STYLE_PROV.load_from_data(bytes(STYLE, 'utf-8'))
Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(),
_STYLE_PROV,
Gtk.STYLE_PROVIDER_PRIORITY_USER)
def _do_init(self) -> Gtk.Widget:
self._change_camera_dialog_cid = None # type: Any
self._widget = Gtk.Grid(row_spacing=10, column_spacing=10)
# Populate self.widget
camera_container = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL,
spacing=5)
self._widget.attach(camera_container, 0, 0, 2, 1)
camera_lbl = Gtk.Label('Camera:', xalign=0)
camera_container.add(camera_lbl)
self._current_camera_lbl = Gtk.Label(xalign=0)
camera_container.add(self._current_camera_lbl)
self._change_camera_btn = Gtk.Button('Connect camera')
self._change_camera_btn.get_style_context().add_class('small-pad')
camera_container.add(self._change_camera_btn)
num_frames_lbl = Gtk.Label('Number of images to capture:', xalign=0)
self._widget.attach(num_frames_lbl, 0, 1, 1, 1)
num_frames_inp_container = Gtk.Grid()
self._widget.attach_next_to(num_frames_inp_container, num_frames_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._num_frames_inp = IntegerEntry(lower=1,
upper=200,
value=1,
width_chars=6)
self._num_frames_inp.get_style_context().add_class('small-pad')
num_frames_inp_container.add(self._num_frames_inp)
frame_interval_lbl = Gtk.Label('Frame interval (s):', xalign=0)
self._widget.attach(frame_interval_lbl, 0, 2, 1, 1)
frame_interval_inp_container = Gtk.Grid()
self._widget.attach_next_to(frame_interval_inp_container,
frame_interval_lbl, Gtk.PositionType.RIGHT,
1, 1)
self._frame_interval_inp = FloatEntry(lower=0,
width_chars=6,
sensitive=False,
invisible_char='\0')
self._frame_interval_inp.get_style_context().add_class('small-pad')
frame_interval_inp_container.add(self._frame_interval_inp)
self._current_camera_err_msg_lbl = Gtk.Label(xalign=0)
self._current_camera_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._current_camera_err_msg_lbl,
camera_container, Gtk.PositionType.RIGHT,
1, 1)
self._num_frames_err_msg_lbl = Gtk.Label(xalign=0)
self._num_frames_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._num_frames_err_msg_lbl,
num_frames_inp_container,
Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_err_msg_lbl = Gtk.Label(xalign=0)
self._frame_interval_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._frame_interval_err_msg_lbl,
frame_interval_inp_container,
Gtk.PositionType.RIGHT, 1, 1)
self._widget.show_all()
# Wiring things up
self._change_camera_btn.connect(
'clicked',
lambda *_: self.presenter.hdl_change_camera_btn_clicked())
self.bn_frame_interval = GObjectPropertyBindable(
self._frame_interval_inp, 'value')
self.bn_num_frames = GObjectPropertyBindable(self._num_frames_inp,
'value')
self.bn_frame_interval_sensitive = GObjectPropertyBindable(
self._frame_interval_inp, 'sensitive')
self._frame_interval_inp.bind_property(
'sensitive', self._frame_interval_inp, 'visibility',
GObject.BindingFlags.SYNC_CREATE)
self.presenter.view_ready()
return self._widget
def set_camera_index(self, camera_index: Optional[int]) -> None:
if camera_index is None:
self._current_camera_lbl.props.label = ''
self._current_camera_lbl.props.visible = False
self._change_camera_btn.props.label = 'Connect camera'
else:
self._current_camera_lbl.props.label = '(Connected to index {})'.format(
camera_index)
self._current_camera_lbl.props.visible = True
self._change_camera_btn.props.label = 'Change camera'
def show_change_camera_dialog(self) -> None:
if self._change_camera_dialog_cid is not None:
return
self._change_camera_dialog_cid, _ = self.new_component(
_change_camera_dialog_cs.factory(
on_response=self.presenter.hdl_change_camera_dialog_response,
parent_window=self._get_window(),
))
def hide_change_camera_dialog(self) -> None:
if self._change_camera_dialog_cid is None:
return
self.remove_component(self._change_camera_dialog_cid)
self._change_camera_dialog_cid = None
def _get_window(self) -> Optional[Gtk.Window]:
toplevel = self._widget.get_toplevel()
if isinstance(toplevel, Gtk.Window):
return toplevel
else:
return None
def _do_destroy(self) -> None:
self._widget.destroy()
def _do_init(self, footer_area: Gtk.Grid) -> Gtk.Widget:
self._widget = Gtk.Grid(margin=20, row_spacing=10, column_spacing=10)
# Label widgets
inner_density_lbl = Gtk.Label('Inner density (kg/m³):', xalign=0)
self._widget.attach(inner_density_lbl, 0, 0, 1, 1)
outer_density_lbl = Gtk.Label('Outer density (kg/m³):', xalign=0)
self._widget.attach(outer_density_lbl, 0, 1, 1, 1)
needle_width_lbl = Gtk.Label('Needle diameter (mm):', xalign=0)
self._widget.attach(needle_width_lbl, 0, 2, 1, 1)
gravity_lbl = Gtk.Label('Gravity (m/s²):', xalign=0)
self._widget.attach(gravity_lbl, 0, 3, 1, 1)
# Input widgets
self._inner_density_inp = FloatEntry(lower=0, width_chars=10)
self._widget.attach_next_to(self._inner_density_inp, inner_density_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._outer_density_inp = FloatEntry(lower=0, width_chars=10)
self._widget.attach_next_to(self._outer_density_inp, outer_density_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._needle_width_inp = FloatEntry(lower=0, width_chars=10)
self._widget.attach_next_to(self._needle_width_inp, needle_width_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._gravity_inp = FloatEntry(lower=0, width_chars=10)
self._widget.attach_next_to(self._gravity_inp, gravity_lbl,
Gtk.PositionType.RIGHT, 1, 1)
self._inner_density_err_msg_lbl = Gtk.Label(xalign=0)
self._inner_density_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._inner_density_err_msg_lbl,
self._inner_density_inp,
Gtk.PositionType.RIGHT, 1, 1)
self._outer_density_err_msg_lbl = Gtk.Label(xalign=0)
self._outer_density_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._outer_density_err_msg_lbl,
self._outer_density_inp,
Gtk.PositionType.RIGHT, 1, 1)
self._needle_width_err_msg_lbl = Gtk.Label(xalign=0)
self._needle_width_err_msg_lbl.get_style_context().add_class(
'error-text')
self._widget.attach_next_to(self._needle_width_err_msg_lbl,
self._needle_width_inp,
Gtk.PositionType.RIGHT, 1, 1)
self._gravity_err_msg_lbl = Gtk.Label(xalign=0)
self._gravity_err_msg_lbl.get_style_context().add_class('error-text')
self._widget.attach_next_to(self._gravity_err_msg_lbl,
self._gravity_inp, Gtk.PositionType.RIGHT,
1, 1)
self._widget.show_all()
self.bn_inner_density = GObjectPropertyBindable(
g_obj=self._inner_density_inp,
prop_name='value',
)
self.bn_outer_density = GObjectPropertyBindable(
g_obj=self._outer_density_inp,
prop_name='value',
)
self.bn_needle_width = GObjectPropertyBindable(
g_obj=self._needle_width_inp,
prop_name='value',
# Needle width shown to user is in millimetres.
transform_from=lambda x: x / 1000 if x is not None else None,
transform_to=lambda x: x * 1000 if x is not None else None,
)
self.bn_gravity = GObjectPropertyBindable(
g_obj=self._gravity_inp,
prop_name='value',
)
_, footer_inside = self.new_component(
linear_navigator_footer_cs.factory(
do_back=self.presenter.prev_page,
do_next=self.presenter.next_page,
))
footer_inside.show()
footer_area.add(footer_inside)
self.presenter.view_ready()
return self._widget
class LocalStorageView(View['LocalStoragePresenter', Gtk.Widget]):
STYLE = '''
.small-pad {
min-height: 0px;
min-width: 0px;
padding: 6px 4px 6px 4px;
}
.error {
color: red;
border: 1px solid red;
}
.error-text {
color: red;
}
'''
_STYLE_PROV = Gtk.CssProvider()
_STYLE_PROV.load_from_data(bytes(STYLE, 'utf-8'))
Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(), _STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
_FILE_INPUT_FILTER = Gtk.FileFilter()
_FILE_INPUT_FILTER.add_mime_type('image/png')
_FILE_INPUT_FILTER.add_mime_type('image/jpg')
def _do_init(self) -> Gtk.Widget:
self._widget = Gtk.Grid(row_spacing=10, column_spacing=10)
file_chooser_lbl = Gtk.Label('Image files:', xalign=0)
self._widget.attach(file_chooser_lbl, 0, 0, 1, 1)
self._file_chooser_inp = FileChooserButton(
file_filter=self._FILE_INPUT_FILTER,
select_multiple=True
)
self._file_chooser_inp.get_style_context().add_class('small-pad')
self._widget.attach_next_to(self._file_chooser_inp, file_chooser_lbl, Gtk.PositionType.RIGHT, 1, 1)
frame_interval_lbl = Gtk.Label('Frame interval (s):')
self._widget.attach(frame_interval_lbl, 0, 1, 1, 1)
frame_interval_inp_container = Gtk.Grid()
self._widget.attach_next_to(frame_interval_inp_container, frame_interval_lbl, Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_inp = FloatEntry(lower=0, width_chars=6, invisible_char='\0', caps_lock_warning=False)
self._frame_interval_inp.get_style_context().add_class('small-pad')
frame_interval_inp_container.add(self._frame_interval_inp)
# Error message labels
self._file_chooser_err_msg_lbl = Gtk.Label(xalign=0)
self._file_chooser_err_msg_lbl.get_style_context().add_class('error-text')
self._widget.attach_next_to(self._file_chooser_err_msg_lbl, self._file_chooser_inp, Gtk.PositionType.RIGHT, 1, 1)
self._frame_interval_err_msg_lbl = Gtk.Label(xalign=0)
self._frame_interval_err_msg_lbl.get_style_context().add_class('error-text')
self._widget.attach_next_to(self._frame_interval_err_msg_lbl, frame_interval_inp_container, Gtk.PositionType.RIGHT, 1, 1)
self._widget.show_all()
self._frame_interval_inp.bind_property(
'sensitive',
self._frame_interval_inp,
'visibility',
GObject.BindingFlags.SYNC_CREATE
)
self.bn_selected_image_paths = GObjectPropertyBindable(self._file_chooser_inp, 'file-paths')
self.bn_frame_interval = GObjectPropertyBindable(self._frame_interval_inp, 'value')
self.bn_frame_interval_sensitive = GObjectPropertyBindable(self._frame_interval_inp, 'sensitive')
# Set which widget is first focused
self._file_chooser_inp.grab_focus()
self.presenter.view_ready()
return self._widget
def _do_destroy(self) -> None:
self._widget.destroy()
def _do_init(self, figure_name: str) -> Gtk.Widget:
self._widget = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=5)
self._should_save_figure_inp = Gtk.CheckButton(
label='Save {}'.format(figure_name))
self._widget.add(self._should_save_figure_inp)
self._more_options = Gtk.Grid(margin_left=30,
row_spacing=5,
column_spacing=10)
self._widget.add(self._more_options)
dpi_lbl = Gtk.Label('Figure DPI:', xalign=0)
self._more_options.attach(dpi_lbl, 0, 0, 1, 1)
dpi_inp_ctn = Gtk.Grid()
self._more_options.attach_next_to(dpi_inp_ctn, dpi_lbl,
Gtk.PositionType.RIGHT, 1, 1)
dpi_inp = IntegerEntry(value=300, lower=72, upper=10000, width_chars=5)
dpi_inp.get_style_context().add_class('small-pad')
dpi_inp_ctn.add(dpi_inp)
dpi_err_lbl = Gtk.Label(xalign=0, width_request=190)
dpi_err_lbl.get_style_context().add_class('error-text')
self._more_options.attach_next_to(dpi_err_lbl, dpi_inp_ctn,
Gtk.PositionType.RIGHT, 1, 1)
size_lbl = Gtk.Label('Figure size (cm):', xalign=0)
self._more_options.attach(size_lbl, 0, 1, 1, 1)
size_inp_ctn = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL,
spacing=5)
self._more_options.attach_next_to(size_inp_ctn, size_lbl,
Gtk.PositionType.RIGHT, 1, 1)
size_w_lbl = Gtk.Label('W:')
size_inp_ctn.add(size_w_lbl)
size_w_inp = FloatEntry(value=10, lower=0, upper=10000, width_chars=6)
size_w_inp.get_style_context().add_class('small-pad')
size_inp_ctn.add(size_w_inp)
size_h_lbl = Gtk.Label('H:')
size_inp_ctn.add(size_h_lbl)
size_h_inp = FloatEntry(value=10, lower=0, upper=10000, width_chars=6)
size_h_inp.get_style_context().add_class('small-pad')
size_inp_ctn.add(size_h_inp)
size_err_lbl = Gtk.Label(xalign=0, width_request=190)
size_err_lbl.get_style_context().add_class('error-text')
self._more_options.attach_next_to(size_err_lbl, size_inp_ctn,
Gtk.PositionType.RIGHT, 1, 1)
self._should_save_figure_inp.bind_property(
'active', # source_property
self._more_options, # target
'sensitive', # target_property
GObject.BindingFlags.SYNC_CREATE, # flags
)
self.bn_should_save = GObjectPropertyBindable(
g_obj=self._should_save_figure_inp,
prop_name='active',
)
self.bn_dpi = GObjectPropertyBindable(
g_obj=dpi_inp,
prop_name='value',
)
self.bn_size_w = GObjectPropertyBindable(
g_obj=size_w_inp,
prop_name='value',
)
self.bn_size_h = GObjectPropertyBindable(
g_obj=size_h_inp,
prop_name='value',
)
self.presenter.view_ready()
self._widget.show_all()
return self._widget
def __init__(self) -> None:
super().__init__(row_spacing=10, column_spacing=10)
self._max_thresh_inp = Gtk.Adjustment(value=255, lower=1, upper=255)
self._min_thresh_inp = Gtk.Adjustment(value=0, lower=0, upper=255)
self._min_thresh_rel_inp = Gtk.Adjustment(value=0, lower=0, upper=1)
max_thresh_lbl = Gtk.Label('Max threshold:', halign=Gtk.Align.START)
self.attach(max_thresh_lbl, 0, 0, 1, 1)
max_thresh_ety = FloatEntry(width_chars=5,
halign=Gtk.Align.END,
xalign=0)
max_thresh_ety.get_style_context().add_class('small-pad')
max_thresh_ety.get_style_context().add_provider(
CannyParameters._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
self.attach(max_thresh_ety, 2, 0, 1, 1)
max_thresh_scl = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL,
adjustment=self._max_thresh_inp,
hexpand=True,
draw_value=False)
max_thresh_scl.get_style_context().add_class('small-pad')
max_thresh_scl.get_style_context().add_provider(
CannyParameters._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
self.attach(max_thresh_scl, 1, 0, 1, 1)
min_thresh_lbl = Gtk.Label('Min threshold:', halign=Gtk.Align.START)
self.attach(min_thresh_lbl, 0, 1, 1, 1)
min_thresh_ety = FloatEntry(width_chars=5,
halign=Gtk.Align.END,
xalign=0)
min_thresh_ety.get_style_context().add_class('small-pad')
min_thresh_ety.get_style_context().add_provider(
CannyParameters._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
self.attach(min_thresh_ety, 2, 1, 1, 1)
min_thresh_scl = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL,
adjustment=self._min_thresh_rel_inp,
hexpand=True,
draw_value=False)
min_thresh_scl.get_style_context().add_class('small-pad')
min_thresh_scl.get_style_context().add_provider(
CannyParameters._STYLE_PROV, Gtk.STYLE_PROVIDER_PRIORITY_USER)
self.attach(min_thresh_scl, 1, 1, 1, 1)
self.show_all()
# Bind the properties of Gtk.Adjustment to the Gtk.Entry widgets for max/min threshold.
for (src, targ), prop in itertools.product(
((self._max_thresh_inp, max_thresh_ety),
(self._min_thresh_inp, min_thresh_ety)),
('value', 'lower', 'upper')):
src.bind_property(
prop, # source_property
targ,
prop, # target, target_property
GObject.BindingFlags.BIDIRECTIONAL # flags
| GObject.BindingFlags.SYNC_CREATE,
lambda _, v: round(v, 1), # transform_to
lambda _, v: v # transform_from
)
self._max_thresh_inp.bind_property('value', self._min_thresh_inp,
'upper')
self._min_thresh_inp.bind_property(
'value', self._min_thresh_rel_inp, 'value',
GObject.BindingFlags.BIDIRECTIONAL
| GObject.BindingFlags.SYNC_CREATE,
lambda _, v: v / self._min_thresh_inp.props.upper,
lambda _, v: v * self._min_thresh_inp.props.upper)
self._notify_min_thresh_rel_inp_when_max_thresh_inp_value_changed_hdl_id = \
self._max_thresh_inp.connect(
'notify::value',
# Emit a notify signal on `min_thresh_rel_inp` so that `min_thresh_inp`'s value will be updated to
# the correct absolute value (by the binding above) since `max_thresh_inp`'s value has changed.
lambda *_: self._min_thresh_rel_inp.notify('value'))
self._notify_max_thresh_when_max_thresh_inp_value_changed_hdl_id = \
self._max_thresh_inp.connect(
'value-changed',
lambda *_: self.notify('max-thresh'))
self._notify_min_thresh_when_min_thresh_inp_value_changed_hdl_id = \
self._min_thresh_inp.connect(
'value-changed',
lambda *_: self.notify('min-thresh'))