Use CSS to fade background colour in ValidatableMaskedEntry
This commit is contained in:
Nick Hall
parent
5ef38e2a57
commit
e2a5fe8e12
@ -43,7 +43,6 @@ from gi.repository import GObject
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from gi.repository import GLib
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from gi.repository import Gdk
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from gi.repository import Gtk
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from gi.repository import GdkPixbuf
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from gi.repository import Pango
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#-------------------------------------------------------------------------
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@ -63,111 +62,6 @@ from .undoableentry import UndoableEntry
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#
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#============================================================================
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class FadeOut(GObject.GObject):
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"""
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I am a helper class to draw the fading effect of the background
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Call my methods :meth:`start` and :meth:`stop` to control the fading.
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"""
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__gsignals__ = {
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'done': (GObject.SignalFlags.RUN_FIRST,
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None,
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()),
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'color-changed': (GObject.SignalFlags.RUN_FIRST,
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None,
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(Gdk.Color, )),
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}
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# How long time it'll take before we start (in ms)
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COMPLAIN_DELAY = 500
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MERGE_COLORS_DELAY = 100
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def __init__(self, widget, err_color = "#ffd5d5"):
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GObject.GObject.__init__(self)
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self.ERROR_COLOR = err_color
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self._widget = widget
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self._start_color = None
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self._background_timeout_id = -1
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self._countdown_timeout_id = -1
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self._done = False
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def _merge_colors(self, src_color, dst_color, steps=10):
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"""
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Change the background of widget from src_color to dst_color
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in the number of steps specified
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"""
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##_LOG.debug('_merge_colors: %s -> %s' % (src_color, dst_color))
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rs, gs, bs = src_color.red, src_color.green, src_color.blue
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rd, gd, bd = dst_color.red, dst_color.green, dst_color.blue
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rinc = (rd - rs) / float(steps)
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ginc = (gd - gs) / float(steps)
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binc = (bd - bs) / float(steps)
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for dummy in range(steps):
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rs += rinc
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gs += ginc
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bs += binc
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col = Gdk.color_parse("#%02X%02X%02X" % (int(rs) >> 8,
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int(gs) >> 8,
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int(bs) >> 8))
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self.emit('color-changed', col)
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yield True
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self.emit('done')
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self._background_timeout_id = -1
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self._done = True
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yield False
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def _start_merging(self):
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# If we changed during the delay
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if self._background_timeout_id != -1:
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##_LOG.debug('_start_merging: Already running')
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return
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##_LOG.debug('_start_merging: Starting')
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generator = self._merge_colors(self._start_color,
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Gdk.color_parse(self.ERROR_COLOR))
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self._background_timeout_id = (
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GLib.timeout_add(FadeOut.MERGE_COLORS_DELAY, generator.__next__))
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self._countdown_timeout_id = -1
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def start(self, color):
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"""
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Schedules a start of the countdown.
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:param color: initial background color
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:returns: True if we could start, False if was already in progress
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"""
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if self._background_timeout_id != -1:
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##_LOG.debug('start: Background change already running')
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return False
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if self._countdown_timeout_id != -1:
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##_LOG.debug('start: Countdown already running')
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return False
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if self._done:
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##_LOG.debug('start: Not running, already set')
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return False
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self._start_color = color
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##_LOG.debug('start: Scheduling')
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self._countdown_timeout_id = GLib.timeout_add(
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FadeOut.COMPLAIN_DELAY, self._start_merging)
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return True
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def stop(self):
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"""Stops the fadeout and restores the background color"""
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##_LOG.debug('Stopping')
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if self._background_timeout_id != -1:
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GLib.source_remove(self._background_timeout_id)
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self._background_timeout_id = -1
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if self._countdown_timeout_id != -1:
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GLib.source_remove(self._countdown_timeout_id)
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self._countdown_timeout_id = -1
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self._widget.update_background(self._start_color, unset=True)
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self._done = False
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(DIRECTION_LEFT, DIRECTION_RIGHT) = (1, -1)
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(INPUT_ASCII_LETTER,
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@ -1013,52 +907,6 @@ class MaskedEntry(UndoableEntry):
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def set_stock(self, icon_name):
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self.set_icon_from_icon_name(Gtk.EntryIconPosition.SECONDARY, icon_name)
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def update_background(self, color, unset=False):
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maxvalcol = 65535.
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if color:
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red = int(color.red/ maxvalcol*255)
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green = int(color.green/ maxvalcol*255)
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blue = int(color.blue/ maxvalcol*255)
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rgba = Gdk.RGBA()
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Gdk.RGBA.parse(rgba, 'rgb(%f,%f,%f)'%(red, green, blue))
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self.override_background_color(Gtk.StateFlags.NORMAL |
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Gtk.StateFlags.ACTIVE | Gtk.StateFlags.SELECTED |
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Gtk.StateFlags.FOCUSED, rgba)
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#GTK 3: workaround, background not changing in themes, use symbolic
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self.override_symbolic_color('bg_color', rgba)
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self.override_symbolic_color('base_color', rgba)
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self.override_symbolic_color('theme_bg_color', rgba)
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self.override_symbolic_color('theme_base_color', rgba)
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##self.get_window().set_background_rgba(rgba)
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pango_context = self.get_layout().get_context()
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font_description = pango_context.get_font_description()
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if unset:
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font_description.set_weight(Pango.Weight.NORMAL)
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else:
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font_description.set_weight(Pango.Weight.BOLD)
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self.override_font(font_description)
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else:
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self.override_background_color(Gtk.StateFlags.NORMAL |
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Gtk.StateFlags.ACTIVE | Gtk.StateFlags.SELECTED |
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Gtk.StateFlags.FOCUSED, None)
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# Setting the following to None causes an error (bug #6353).
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#self.override_symbolic_color('bg_color', None)
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#self.override_symbolic_color('base_color', None)
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#self.override_symbolic_color('theme_bg_color', None)
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#self.override_symbolic_color('theme_base_color', None)
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pango_context = self.get_layout().get_context()
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font_description = pango_context.get_font_description()
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font_description.set_weight(Pango.Weight.NORMAL)
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self.override_font(font_description)
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def get_background(self):
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backcol = self.get_style_context().get_background_color(Gtk.StateType.NORMAL)
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bcol= Gdk.Color.parse('#fff')[1]
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bcol.red = int(backcol.red * 65535)
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bcol.green = int(backcol.green * 65535)
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bcol.blue = int(backcol.blue * 65535)
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return bcol
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# Gtk.EntryCompletion convenience function
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def prefill(self, itemdata, sort=False):
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@ -1091,6 +939,7 @@ class MaskedEntry(UndoableEntry):
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VALIDATION_ICON_WIDTH = 16
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MANDATORY_ICON = 'dialog-information'
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ERROR_ICON = 'process-stop'
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FADE_TIME = 2500
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class ValidatableMaskedEntry(MaskedEntry):
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"""
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@ -1132,7 +981,7 @@ class ValidatableMaskedEntry(MaskedEntry):
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#allowed_data_types = (basestring, datetime.date, datetime.time,
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#datetime.datetime, object) + number
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def __init__(self, data_type=None, err_color = "#ffd5d5", error_icon=ERROR_ICON):
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def __init__(self, data_type=None, err_color="pink", error_icon=ERROR_ICON):
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self.data_type = None
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self.mandatory = False
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self.error_icon = error_icon
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@ -1142,8 +991,19 @@ class ValidatableMaskedEntry(MaskedEntry):
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self._valid = True
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self._def_error_msg = None
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self._fade = FadeOut(self, err_color)
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self._fade.connect('color-changed', self._on_fadeout__color_changed)
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self.__fade_tag = None
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provider = Gtk.CssProvider()
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css = '.fade {\n'
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css += ' background: {};\n'.format(err_color)
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css += ' transition: background {:d}ms linear;\n'.format(FADE_TIME)
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css += '}'
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css += '.bg {\n'
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css += ' background: {};\n'.format(err_color)
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css += '}'
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provider.load_from_data(css.encode('utf8'))
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context = self.get_style_context()
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context.add_provider(provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
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# FIXME put data type support back
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#self.set_property('data-type', data_type)
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@ -1265,10 +1125,18 @@ class ValidatableMaskedEntry(MaskedEntry):
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reset the background color
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"""
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##_LOG.debug('Setting state for %s to VALID' % self.model_attribute)
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if self.is_valid():
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return
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self._set_valid_state(True)
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self._fade.stop()
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self.set_pixbuf(None)
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if self.__fade_tag is not None:
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GLib.source_remove(self.__fade_tag)
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self.__fade_tag = None
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self.set_stock(None)
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context = self.get_style_context()
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context.remove_class('fade')
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context.remove_class('bg')
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def set_invalid(self, text=None, fade=True):
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"""
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@ -1278,6 +1146,8 @@ class ValidatableMaskedEntry(MaskedEntry):
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:param fade: if we should fade the background
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"""
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##_LOG.debug('Setting state for %s to INVALID' % self.model_attribute)
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if not self.is_valid():
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return
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self._set_valid_state(False)
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@ -1306,29 +1176,13 @@ class ValidatableMaskedEntry(MaskedEntry):
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self.set_tooltip(text)
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if not fade:
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if self.error_icon:
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self.set_stock(self.error_icon)
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self.update_background(Gdk.color_parse(self._fade.ERROR_COLOR))
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return
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# When the fading animation is finished, set the error icon
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# We don't need to check if the state is valid, since stop()
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# (which removes this timeout) is called as soon as the user
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# types valid data.
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def done(fadeout, c):
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if self.error_icon:
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self.set_stock(self.error_icon)
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self.queue_draw()
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fadeout.disconnect(c.signal_id)
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class SignalContainer:
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pass
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c = SignalContainer()
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c.signal_id = self._fade.connect('done', done, c)
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if self._fade.start(self.get_background()):
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self.set_pixbuf(None)
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context = self.get_style_context()
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if fade:
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self.__fade_tag = GLib.timeout_add(FADE_TIME, self.__fade_finished)
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context.add_class('fade')
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else:
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self.set_stock(self.error_icon)
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context.add_class('bg')
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def set_blank(self):
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"""
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@ -1340,9 +1194,7 @@ class ValidatableMaskedEntry(MaskedEntry):
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if self.mandatory:
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self.set_stock(MANDATORY_ICON)
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self.queue_draw()
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self.set_tooltip(_('This field is mandatory'))
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self._fade.stop()
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valid = False
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else:
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valid = True
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@ -1377,10 +1229,11 @@ class ValidatableMaskedEntry(MaskedEntry):
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self.emit('validation-changed', state)
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self._valid = state
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# Callbacks
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def _on_fadeout__color_changed(self, fadeout, color):
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self.update_background(color)
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def __fade_finished(self):
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"""Set error icon after fade has finished."""
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self.__fade_tag = None
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self.set_stock(self.error_icon)
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return False
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def main(args):
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