/
balto_gui.py
2852 lines (2554 loc) · 119 KB
/
balto_gui.py
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"""
This module defines a class called "balto_gui" that can be used to
create a graphical user interface (GUI) for downloading data from
OpenDAP servers from and into a Jupyter notebook. If used with Binder,
this GUI runs in a browser window and does not require the user to
install anything on their computer. However, this module should be
included in the same directory as the Jupyter notebook.
"""
#------------------------------------------------------------------------
#
# Copyright (C) 2020-2022. Scott D. Peckham
#
#------------------------------------------------------------------------
from ipyleaflet import Map, basemaps, FullScreenControl
from ipyleaflet import MeasureControl, Rectangle
## from ipyleaflet import ScaleControl # (doesn't work)
from traitlets import Tuple
## import ipyleaflet as ipyl
import ipywidgets as widgets
from ipywidgets import Layout
from IPython.display import display, HTML
## from IPython.core.display import display
## from IPython.lib.display import display
import pydap.client # (for open_url, etc.)
import requests # (used by get_filenames() )
import json
import datetime # (used by get_duration() )
import copy
import numpy as np
import balto_plot as bp
#------------------------------------------------------------------------
#
# class balto_gui
# __init__()
# pix_str()
# show_gui()
# make_acc_gui()
# make_tab_gui()
# make_data_panel()
# reset_data_panel()
# make_map_panel()
# make_dates_panel()
# make_download_panel()
# make_prefs_panel()
# #--------------------------
# get_map_bounds()
# replace_map_bounds()
# replace_map_bounds2()
# update_map_bounds()
# zoom_out_to_new_bounds()
# --------------------------
# get_url_dir_filenames()
# update_filename_list()
# get_opendap_file_url()
# open_dataset()
# update_data_panel()
# --------------------------
# update_var_info()
# get_all_var_shortnames()
# get_all_var_longnames()
# get_all_var_units()
# --------------------------
# get_var_shortname()
# get_var_longname()
# get_var_units()
# get_var_shape()
# get_var_dimensions()
# get_var_dtype()
# get_var_attributes()
# get_var_time_attributes()
# -------------------------------
# update_datetime_panel()
# get_years_from_time_since()
# clear_datetime_notes()
# append_datetime_notes()
# list_to_string()
# -------------------------------
# pad_with_zeros()
# get_actual_time_units()
# get_time_delta_str()
# get_datetime_obj_from_str()
# get_datetime_obj_from_one_str()
# get_start_datetime_obj()
# get_end_datetime_obj()
# get_dt_from_datetime_str()
# split_datetime_str()
# split_date_str()
# split_time_str()
# get_datetime_from_time_since()
# get_time_since_from_datetime()
# get_month_difference()
# -------------------------------
# get_new_time_index_range()
# get_new_lat_index_range()
# get_new_lon_index_range()
# -------------------------------
# get_duration() ## not used yet
# ----------------------------
# get_download_format()
# clear_download_log()
# append_download_log()
# print_user_choices()
# download_data()
# show_grid()
# -------------------------------
# get_opendap_package() # (in prefs panel)
# ----------------------------
# get_abbreviated_var_name()
# get_possible_svo_names()
#
#------------------------------
# Example GES DISC opendap URL
#------------------------------
# https://gpm1.gesdisc.eosdis.nasa.gov/opendap/GPM_L3/GPM_3IMERGHHE.05/2014/091/
# 3B-HHR-E.MS.MRG.3IMERG.20140401-S000000-E002959.0000.V05B.HDF5.nc
# ?HQprecipitation[1999:2200][919:1049],lon[1999:2200],lat[919:1049]
#------------------------------------------------------------------------
class balto_gui:
#--------------------------------------------------------------------
def __init__(self):
self.version = '0.5'
self.user_var = None
self.default_url_dir = 'http://test.opendap.org/dap/data/nc/'
self.timeout_secs = 60 # (seconds)
#----------------------------------------------------------
# "full_box_width" = (label_width + widget_width)
# gui_width = left_label_width + mid_width + button_width
# The 2nd, label + widget box, is referred to as "next".
# (2 * half_widget_width) + left_label + next_label = 540
#----------------------------------------------------------
self.gui_width = 680
self.left_label_width = 120
self.next_label_width = 50
self.all_label_width = 170
self.full_box_width = 540
self.widget_width = (self.full_box_width - self.left_label_width)
# self.half_widget_width = (self.full_box_width - self.all_label_width)/2
# self.half_widget_width = 183
self.left_widget_width = 230
self.next_widget_width = 136
self.left_box_width = (self.left_label_width + self.left_widget_width)
self.next_box_width = (self.next_label_width + self.next_widget_width)
self.button_width = 70 # big enough for "Reset"
#-----------------------------------------------------
self.map_width = (self.gui_width - 40)
self.map_height = 230 # was 250
self.map_center_init = (20.0, 0)
self.add_fullscreen_control = True
self.add_scale_control = False # (doesn't work)
self.add_measure_control = True
#-----------------------------------------------------
self.gui_width_px = self.pix_str( self.gui_width )
self.map_width_px = self.pix_str( self.map_width )
self.map_height_px = self.pix_str( self.map_height )
#-----------------------------------------------------
self.date_width_px = '240px'
self.time_width_px = '180px'
self.hint_width_px = '120px'
#---------------------------------------------------
self.log_box_width_px = self.pix_str( self.full_box_width )
self.log_box_height_px = '200px'
#---------------------------------------------------
# These styles are used to control width of labels
# self.init_label_style is the initial default.
#---------------------------------------------------
llw_px = self.pix_str( self.left_label_width )
nlw_px = self.pix_str( self.next_label_width )
self.init_label_style = {'description_width': 'initial'}
self.left_label_style = {'description_width': llw_px}
self.next_label_style = {'description_width': nlw_px}
self.date_style = {'description_width': '70px'}
self.time_style = {'description_width': '70px'}
# __init__()
#--------------------------------------------------------------------
def pix_str(self, num):
return str(num) + 'px'
#--------------------------------------------------------------------
def show_gui(self, ACC_STYLE=False, SHOW_MAP=True):
#------------------------------------------------------
# Encountered a problem where there was some problem
# with ipyleaflets (used for the map panel) that
# prevented any part of the GUI from being displayed.
# The SHOW_MAP flag helps to test for this problem.
#------------------------------------------------------
#------------------------------------
# Create & display the complete GUI
#-----------------------------------
if (ACC_STYLE):
self.make_acc_gui()
else:
# Use the TAB style
self.make_tab_gui( SHOW_MAP=SHOW_MAP)
gui_output = widgets.Output()
display(self.gui, gui_output)
# show_gui()
#--------------------------------------------------------------------
def make_acc_gui(self):
gui_width_px = self.gui_width_px
self.make_data_panel()
self.make_map_panel()
self.make_datetime_panel()
self.make_download_panel()
self.make_prefs_panel()
#---------------------------
p0 = self.data_panel
p1 = self.map_panel
p2 = self.datetime_panel
p3 = self.download_panel
p4 = self.prefs_panel
#---------------------------
p0_title = 'Browse Data'
p1_title = 'Spatial Extent'
p2_title = 'Date Range'
p3_title = 'Download Data'
p4_title = 'Settings'
#-------------------------------------------------------
# selected_index=None causes all cells to be collapsed
#-------------------------------------------------------
acc = widgets.Accordion( children=[p0, p1, p2, p3, p4],
selected_index=None,
layout=Layout(width=gui_width_px) )
acc.set_title(0, p0_title)
acc.set_title(1, p1_title)
acc.set_title(2, p2_title)
acc.set_title(3, p3_title)
acc.set_title(4, p4_title)
# title = 'BALTO User Interface'
# L_tags = "<b><font size=5>"
# R_tags = "</font></b>"
# heading = (L_tags + title + R_tags)
pad = self.get_padding(1, HORIZONTAL=False) # 1 lines
head = widgets.HTML(value=f"<b><font size=4>BALTO User Interface</font></b>")
# head = widgets.Label('BALTO User Interface')
# self.gui = widgets.VBox([pad, head, acc]) # (top padding
self.gui = widgets.VBox([head, acc]) # (no top padding)
# make_acc_gui()
#--------------------------------------------------------------------
def make_tab_gui(self, SHOW_MAP=True):
#---------------------------------------------------------
# If there is a problem with ipyleaflet, it can prevent
# any part of the GUI from being displayed. You can
# set SHOW_MAP=False to remove the map to test for this.
#---------------------------------------------------------
gui_width_px = self.gui_width_px
self.make_data_panel()
self.make_map_panel( SHOW_MAP=SHOW_MAP )
self.make_datetime_panel()
self.make_download_panel()
self.make_prefs_panel()
#---------------------------
p0 = self.data_panel
p1 = self.map_panel
p2 = self.datetime_panel
p3 = self.download_panel
p4 = self.prefs_panel
#---------------------------
p0_title = 'Browse Data'
p1_title = 'Spatial Extent'
p2_title = 'Date Range'
p3_title = 'Download Data'
p4_title = 'Settings'
#-------------------------------------------------------
# selected_index=0 shows Browse Data panel
#-------------------------------------------------------
tab = widgets.Tab( children=[p0, p1, p2, p3, p4],
selected_index=0,
layout=Layout(width=gui_width_px) )
tab.set_title(0, p0_title)
tab.set_title(1, p1_title)
tab.set_title(2, p2_title)
tab.set_title(3, p3_title)
tab.set_title(4, p4_title)
#### tab.titles = [str(i) for i in range(len(children))]
# title = 'BALTO User Interface'
# L_tags = "<b><font size=5>"
# R_tags = "</font></b>"
# heading = (L_tags + title + R_tags)
pad = self.get_padding(1, HORIZONTAL=False) # 1 lines
head = widgets.HTML(value=f"<b><font size=5>BALTO User Interface</font></b>")
# head = widgets.Label('BALTO User Interface')
## self.gui = widgets.VBox([pad, head, acc])
self.gui = widgets.VBox([head, tab]) # (no padding above)
# make_tab_gui()
#--------------------------------------------------------------------
def get_padding(self, n, HORIZONTAL=True):
#-------------------------------
# Get some white space padding
#-------------------------------
if (HORIZONTAL):
#--------------------------------
# Use overloaded multiplication
#--------------------------------
## s = (' ' * n) # overloaded multiplication
s = "<p>" + (' ' * n) + "</p>"
pad = widgets.HTML( value=s )
else:
s = ("<br>" * n)
pad = widgets.HTML( value=s )
return pad
# get_padding()
#--------------------------------------------------------------------
def make_data_panel(self):
#-----------------------------------
# Browse data on an OpenDAP server
#-----------------------------------
left_style = self.left_label_style
next_style = self.next_label_style
full_width_px = self.pix_str( self.full_box_width )
left_width_px = self.pix_str( self.left_box_width )
next_width_px = self.pix_str( self.next_box_width )
btn_width_px = self.pix_str( self.button_width )
#---------------------------------------------------------
o1 = widgets.Text(description='OpenDAP URL Dir:',
value=self.default_url_dir,
disabled=False, style=left_style,
layout=Layout(width=full_width_px))
b1 = widgets.Button(description="Go", layout=Layout(width=btn_width_px))
o2 = widgets.Dropdown( description='Filename:',
options=[''], value='',
disabled=False, style=left_style,
layout=Layout(width=full_width_px) )
#------------------------------------------------------------------
oL = widgets.Text(description='Long name:', style=left_style,
value='', layout=Layout(width=full_width_px) )
## o3 = widgets.Select( description='Variable:',
o3 = widgets.Dropdown( description='Variable:',
options=[''], value='',
disabled=False, style=left_style,
layout=Layout(width=left_width_px) )
o4 = widgets.Text(description='Units:', style=next_style,
value='', layout=Layout(width=next_width_px) )
#------------------------------------------------------------------
o5 = widgets.Text(description='Dimensions:', style=left_style,
value='', layout=Layout(width=left_width_px) )
o6 = widgets.Text(description='Shape:', style=next_style,
value='', layout=Layout(width=next_width_px) )
#------------------------------------------------------------------
o7 = widgets.Text(description='Data type:', style=left_style,
value='', layout=Layout(width=full_width_px) )
o8 = widgets.Dropdown( description='Attributes:',
options=[''], value='',
disabled=False, style=left_style,
layout=Layout(width=full_width_px) )
o9 = widgets.Text(description='Status:', style=left_style,
value='Ready.', layout=Layout(width=full_width_px) )
b2 = widgets.Button(description="Reset", layout=Layout(width=btn_width_px))
## pd = widgets.HTML((' ' * 1)) # for padding
#-------------------------------
# Arrange widgets in the panel
#-------------------------------
url_box = widgets.HBox([o1, b1]) # directory + Go button
stat_box = widgets.HBox([o9, b2]) # status + Reset button
name_box = widgets.VBox([o3, o5])
## pad_box = widgets.VBox([pd, pd])
unit_box = widgets.VBox([o4, o6])
mid_box = widgets.HBox([name_box, unit_box])
## mid_box = widgets.HBox([name_box, pad_box, unit_box])
panel = widgets.VBox([url_box, o2, oL, mid_box, o7, o8, stat_box])
self.data_url_dir = o1 # on an OpenDAP server
self.data_filename = o2
self.data_var_long_name = oL
self.data_var_name = o3 # short_name
self.data_var_units = o4
self.data_var_dims = o5
self.data_var_shape = o6
self.data_var_type = o7
self.data_var_atts = o8
self.data_status = o9
self.data_panel = panel
#-----------------
# Event handlers
#-----------------------------------------------------
# Note: NEED to set names='value' here. If names
# keyword is omitted, only works intermittently.
#------------------------------------------------------------
# "on_click" handler function is passed b1 as argument.
# "observe" handler function is passed "change", which
# is a dictionary, as argument. See Traitlet events.
#------------------------------------------------------------
b1.on_click( self.update_filename_list )
b2.on_click( self.reset_data_panel )
o2.observe( self.update_data_panel, names=['options','value'] )
o3.observe( self.update_var_info, names=['options', 'value'] )
## o3.observe( self.update_var_info, names='value' )
## o2.observe( self.update_data_panel, names='All' )
## o3.observe( self.update_var_info, names='All' )
#-------------------------------------------------------
# It turned out this wasn't an issue, but interesting.
#-------------------------------------------------------
# Note: Method functions have type "method" instead
# of "function" and therefore can't be passed
# directly to widget handlers like "on_click".
# But we can use the "__func__" attribute.
#-------------------------------------------------------
# b1.on_click( self.update_filename_list.__func__ )
# o2.observe( self.update_data_panel.__func__ )
# o3.observe( self.update_var_info.__func__, names='value' )
# make_data_panel()
#--------------------------------------------------------------------
def reset_data_panel(self, caller_obj=None, KEEP_DIR=False):
#----------------------------------------------------
# Note: This is called by the "on_click" method of
# the "Reset" button beside the status box.
# In this case, type(caller_obj) =
# <class 'ipywidgets.widgets.widget_button.Button'>
#----------------------------------------------------
if not(KEEP_DIR):
self.data_url_dir.value = self.default_url_dir
self.data_filename.options = ['']
self.data_var_name.options = [''] # short names
self.data_var_long_name.value = ''
self.data_var_units.value = ''
self.data_var_shape.value = ''
self.data_var_dims.value = ''
self.data_var_type.value = ''
self.data_var_atts.options = ['']
self.data_status.value = 'Ready.'
#------------------------------------------
self.download_log.value = ''
# reset_data_panel()
#--------------------------------------------------------------------
def make_map_panel(self, SHOW_MAP=True):
map_width_px = self.map_width_px
map_height_px = self.map_height_px
btn_width_px = self.pix_str( self.button_width )
#--------------------------------------------------
# bm_style = {'description_width': '70px'} # for top
bbox_style = {'description_width': '100px'}
bbox_width_px = '260px'
#---------------------------------------
# Create the map width with ipyleaflet
# Center lat 20 looks better than 0.
#---------------------------------------
map_center = self.map_center_init # (lat, lon)
m = Map(center=map_center, zoom=1,
layout=Layout(width=map_width_px, height=map_height_px))
#----------------------
# Add more controls ?
#----------------------
if (self.add_fullscreen_control):
m.add_control( FullScreenControl( position='topright' ) )
#---------------------------------------------------------
# Cannot be imported. (2020-05-18)
# if (self.add_scale_control):
# m.add_control(ScaleControl( position='bottomleft' ))
#---------------------------------------------------------
if (self.add_measure_control):
measure = MeasureControl( position='bottomright',
active_color = 'orange',
primary_length_unit = 'kilometers')
m.add_control(measure)
measure.completed_color = 'red'
## measure.add_length_unit('yards', 1.09361, 4)
## measure.secondary_length_unit = 'yards'
## measure.add_area_unit('sqyards', 1.19599, 4)
## measure.secondary_area_unit = 'sqyards'
#-----------------------------------------------------
# Does "step=0.01" restrict accuracy of selection ??
#-----------------------------------------------------
w1 = widgets.BoundedFloatText(
value=-180, step=0.01, min=-360, max=360.0,
description='West edge lon:',
disabled=False, style=bbox_style,
layout=Layout(width=bbox_width_px) )
w2 = widgets.BoundedFloatText(
value=180, step=0.01, min=-360, max=360.0,
description='East edge lon:',
disabled=False, style=bbox_style,
layout=Layout(width=bbox_width_px) )
w3 = widgets.BoundedFloatText(
value=90, min=-90, max=90.0, step=0.01,
# description='North latitude:',
description='North edge lat:',
disabled=False, style=bbox_style,
layout=Layout(width=bbox_width_px) )
w4 = widgets.BoundedFloatText(
value=-90, min=-90, max=90.0, step=0.01,
# description='South latitude:',
description='South edge lat:',
disabled=False, style=bbox_style,
layout=Layout(width=bbox_width_px) )
pd = widgets.HTML((' ' * 2)) # for padding
b1 = widgets.Button(description="Update",
layout=Layout(width=btn_width_px))
b2 = widgets.Button(description="Reset",
layout=Layout(width=btn_width_px))
#---------------------
# Choose the basemap
#---------------------
options = self.get_basemap_list()
bm = widgets.Dropdown( description='Base map:',
options=options, value=options[0],
disabled=False, style=bbox_style,
layout=Layout(width='360px') )
#-----------------------------------
# Arrange the widgets in the panel
#-----------------------------------
lons = widgets.VBox([w1, w2])
lats = widgets.VBox([w3, w4])
pads = widgets.VBox([pd, pd])
btns = widgets.VBox([b1, b2])
bbox = widgets.HBox( [lons, lats, pads, btns])
#------------------------------------------------------
# Encountered a problem where there was some problem
# with ipyleaflets (used for the map panel) that
# prevented any part of the GUI from being displayed.
# The SHOW_MAP flag helps to test for this problem.
#------------------------------------------------------
if (SHOW_MAP):
panel = widgets.VBox( [m, bbox, bm] )
else:
panel = widgets.VBox( [bbox, bm] )
self.map_window = m
self.map_minlon = w1
self.map_maxlon = w2
self.map_maxlat = w3
self.map_minlat = w4
self.map_basemap = bm
self.map_panel = panel
## self.map_bounds = (-180, -90, 180, 90)
#-----------------
# Event handlers
#-----------------
bm.observe( self.change_base_map, names=['options','value'] )
m.on_interaction( self.replace_map_bounds )
m.observe( self.zoom_out_to_new_bounds, 'bounds' )
m.new_bounds = None # (used for "zoom to fit")
b1.on_click( self.update_map_bounds )
b2.on_click( self.reset_map_panel )
# make_map_panel()
#--------------------------------------------------------------------
def get_basemap_list(self):
basemap_list = [
'OpenStreetMap.Mapnik', 'OpenStreetMap.HOT', 'OpenTopoMap',
'Esri.WorldStreetMap', 'Esri.DeLorme', 'Esri.WorldTopoMap',
'Esri.WorldImagery', 'Esri.NatGeoWorldMap',
'NASAGIBS.ModisTerraTrueColorCR', 'NASAGIBS.ModisTerraBands367CR',
'NASAGIBS.ModisTerraBands721CR', 'NASAGIBS.ModisAquaTrueColorCR',
'NASAGIBS.ModisAquaBands721CR', 'NASAGIBS.ViirsTrueColorCR',
'NASAGIBS.ViirsEarthAtNight2012',
'Strava.All', 'Strava.Ride', 'Strava.Run', 'Strava.Water',
'Strava.Winter', 'Stamen.Terrain', 'Stamen.Toner',
'Stamen.Watercolor' ]
#---------------------------------
# 'HikeBike.HikeBike', 'MtbMap'
# 'OpenStreetMap.BlackAndWhite',
# 'OpenStreetMap.France',
#----------------------------------
return basemap_list
# get_basemap_list()
#--------------------------------------------------------------------
def change_base_map(self, caller_obj=None):
#--------------------------------------------------------
# Cannot directly change the basemap for some reason.
# self.map_window.basemap = basemaps.Esri.WorldStreetMap
# Need to call clear_layers(), then add_layer().
#---------------------------------------------------------
map_choice = self.map_basemap.value
self.map_window.clear_layers()
basemap_layer = eval( 'basemaps.' + map_choice )
self.map_window.add_layer( basemap_layer )
# For testing
# print('map_choice =', map_choice)
# print('Changed the basemap.')
# change_base_map()
#--------------------------------------------------------------------
def update_map_view(self, caller_obj=None):
pass
# update_map_view()
#--------------------------------------------------------------------
def reset_map_panel(self, caller_obj=None):
self.map_window.center = self.map_center_init
self.map_window.zoom = 1
self.map_minlon.value = '-225.0'
self.map_maxlon.value = '225.0'
self.map_minlat.value = '-51.6'
self.map_maxlat.value = '70.6'
# reset_map_panel()
#--------------------------------------------------------------------
def make_datetime_panel(self):
full_box_width_px = self.pix_str( self.full_box_width )
date_width_px = self.date_width_px
time_width_px = self.time_width_px
hint_width_px = self.hint_width_px
#-----------------------------------
date_style = self.date_style
time_style = self.time_style
d1 = widgets.DatePicker( description='Start Date:',
disabled=False, style=date_style,
layout=Layout(width=date_width_px) )
d2 = widgets.DatePicker( description='End Date:',
disabled=False, style=date_style,
layout=Layout(width=date_width_px) )
d3 = widgets.Text( description='Start Time:',
disabled=False, style=time_style,
layout=Layout(width=time_width_px) )
d4 = widgets.Text( description='End Time:',
disabled=False, style=time_style,
layout=Layout(width=time_width_px) )
d3.value = '00:00:00'
d4.value = '00:00:00'
#-------------------------------
# Add some padding on the left
#-------------------------------
## margin = '0px 0px 2px 10px' # top right bottom left
pp = widgets.HTML((' ' * 3)) # for padding
d5 = widgets.Label( '(hh:mm:ss, 24-hr)',
layout=Layout(width=hint_width_px) )
## layout=Layout(width=hint_width_px, margin=margin) )
## disabled=False, style=hint_style )
d6 = widgets.Label( '(hh:mm:ss, 24-hr)',
layout=Layout(width=hint_width_px) )
## layout=Layout(width=hint_width_px, margin=margin) )
## disabled=False, style=hint_style )
d7 = widgets.Dropdown( description='Attributes:',
options=[''], value='',
disabled=False, style=date_style,
layout=Layout(width=full_box_width_px) )
# d8 = widgets.Text( description='Notes:',
# disabled=False, style=self.date_style,
# layout=Layout(width=full_box_width_px) )
d8 = widgets.Textarea( description='Notes:', value='',
disabled=False, style=self.date_style,
layout=Layout(width=full_box_width_px, height='140px'))
dates = widgets.VBox([d1, d2])
times = widgets.VBox([d3, d4])
hints = widgets.VBox([d5, d6])
pad = widgets.VBox([pp, pp])
top = widgets.HBox([dates, times, pad, hints])
panel = widgets.VBox([top, d7, d8])
## panel = widgets.VBox([top, pp, d7, d8])
self.datetime_start_date = d1
self.datetime_start_time = d3
self.datetime_end_date = d2
self.datetime_end_time = d4
self.datetime_attributes = d7
self.datetime_notes = d8
self.datetime_panel = panel
# make_datetime_panel()
#--------------------------------------------------------------------
def make_download_panel(self):
init_style = self.init_label_style
f1 = widgets.Dropdown( description='Download Format:',
options=['HDF', 'netCDF', 'netCDF4', 'ASCII'],
value='netCDF',
disabled=False, style=init_style)
pad = widgets.HTML(value=f"<p> </p>") # padding
b3 = widgets.Button(description="Download")
h3 = widgets.HBox([f1, pad, b3])
#-----------------------------------
# Could use this for info messages
#-----------------------------------
# status = widgets.Text(description=' Status:', style=self.style0,
# layout=Layout(width='380px') )
width_px = self.log_box_width_px
height_px = self.log_box_height_px
log = widgets.Textarea( description='', value='',
disabled=False, style=init_style,
layout=Layout(width=width_px, height=height_px))
## panel = widgets.VBox([h3, status, log])
panel = widgets.VBox([h3, log])
self.download_format = f1
self.download_button = b3
self.download_log = log
self.download_panel = panel
#-----------------
# Event handlers
#-----------------
b3.on_click( self.download_data )
# make_download_panel()
#--------------------------------------------------------------------
def make_prefs_panel(self):
full_box_width_px = self.pix_str( self.full_box_width )
left_style = self.left_label_style
w1 = widgets.Dropdown( description='OpenDAP package:',
options=['pydap', 'netcdf4'],
value='pydap',
disabled=False, style=left_style)
ts = self.timeout_secs
t1 = widgets.BoundedIntText( description='Timeout:',
value=ts, min=10, max=1000,
step=1, disabled=False,
style=left_style)
t2 = widgets.Label( ' (seconds)',
layout=Layout(width='80px') )
w2 = widgets.HBox([t1, t2])
note = 'Under construction; preferences will go here.'
w3 = widgets.Textarea( description='Notes:', value=note,
disabled=False, style=left_style,
layout=Layout(width=full_box_width_px, height='50px'))
panel = widgets.VBox([w1, w2, w3])
self.prefs_package = w1
self.prefs_timeout = t1
self.prefs_notes = w2
self.prefs_panel = panel
# make_prefs_panel()
#--------------------------------------------------------------------
#--------------------------------------------------------------------
def get_map_bounds(self, FROM_MAP=True, style='sw_and_ne_corners'):
#-------------------------------------------------------
# Notes: ipyleaflet defines "bounds" as:
# [[minlat, maxlat], [minlon, maxlon]]
# matplotlib.imshow defines "extent" as:
# extent = [minlon, maxlon, minlat, maxlat]
#-------------------------------------------------------
# Return value is a list, not a tuple, but
# ok to use it like this:
# [minlon, minlat, maxlon, maxlat] = get_map_bounds().
#-------------------------------------------------------
if (FROM_MAP):
#------------------------------------
# Get the visible map bounds, after
# interaction such as pan or zoom
#------------------------------------
# bounds = self.map_window.bounds
# minlat = bounds[0][0]
# minlon = bounds[0][1]
# maxlat = bounds[1][0]
# maxlon = bounds[1][1]
#------------------------------------
# Is this more reliable ?
#------------------------------------
minlon = self.map_window.west
minlat = self.map_window.south
maxlon = self.map_window.east
maxlat = self.map_window.north
else:
#---------------------------------
# Get map bounds from text boxes
#---------------------------------
minlon = self.map_minlon.value
minlat = self.map_minlat.value
maxlon = self.map_maxlon.value
maxlat = self.map_maxlat.value
#------------------------------------------
# Return map bounds in different "styles"
#------------------------------------------
if (style == 'ipyleaflet'):
bounds = [[minlat, maxlat], [minlon, maxlon]]
elif (style == 'pyplot_imshow'):
bounds = [minlon, maxlon, minlat, maxlat]
elif (style == 'sw_and_ne_corner'):
bounds = [minlon, minlat, maxlon, maxlat]
else:
bounds = [minlon, minlat, maxlon, maxlat]
return bounds
# get_map_bounds()
#--------------------------------------------------------------------
def replace_map_bounds(self, event, type=None, coordinates=None):
#-------------------------------------------
# Get visible map bounds after interaction
# Called by m.on_interaction().
# Don't need to process separate events?
#-------------------------------------------
[minlon, minlat, maxlon, maxlat] = self.get_map_bounds()
#--------------------------------
# Save new values in text boxes
# Format with 8 decimal places.
#--------------------------------
self.map_minlon.value = "{:.8f}".format( minlon )
self.map_maxlon.value = "{:.8f}".format( maxlon )
self.map_maxlat.value = "{:.8f}".format( maxlat )
self.map_minlat.value = "{:.8f}".format( minlat )
# replace_map_bounds()
#--------------------------------------------------------------------
# def replace_map_bounds2(self, event, type=None, coordinates=None):
#
# # events: mouseup, mousedown, mousemove, mouseover,
# # mouseout, click, dblclick, preclick
# event = kwargs.get('type')
# # print('event = ', event)
# if (event == 'mouseup') or (event == 'mousemove') or \
# (event == 'click') or (event == 'dblclick'):
# w1.value = m.west
# w2.value = m.east
# w3.value = m.north
# w4.value = m.south
#
# # status.value = event
#
# # with output2:
# # print( event )
#
#--------------------------------------------------------------------
def update_map_bounds(self, caller_obj=None):
[bb_minlon, bb_minlat, bb_maxlon, bb_maxlat] = \
self.get_map_bounds( FROM_MAP = False )
bb_midlon = (bb_minlon + bb_maxlon) / 2
bb_midlat = (bb_minlat + bb_maxlat) / 2
bb_center = ( bb_midlat, bb_midlon )
# print('bb_minlon, bb_maxlon =', bb_minlon, bb_maxlon)
# print('bb_minlat, bb_maxlat =', bb_minlat, bb_maxlat)
#----------------------------------------------------------
zoom = self.map_window.max_zoom # (usually 18)
self.map_window.center = bb_center
self.map_window.zoom = zoom
## print('max_zoom =', self.map_window.max_zoom)
## print('map_window.bounds =', self.map_window.bounds )
#------------------------------------
# Add "new_bounds" attribute to map
#------------------------------------
new_bounds = ((bb_minlat, bb_minlon), (bb_maxlat, bb_maxlon))
self.map_window.new_bounds = Tuple()
self.map_window.new_bounds = new_bounds
# update_map_bounds()
#--------------------------------------------------------------------
def zoom_out_to_new_bounds(self, change=None):
# change owner is the widget that triggers the handler
m = change.owner
#-----------------------------------------
# If not zoomed all the way out already,
# and we have a target bounding box
#-----------------------------------------
if (m.zoom > 1 and m.new_bounds):
b = m.new_bounds
n = change.new
if (n[0][0] < b[0][0] and n[0][1] < b[0][1] and
n[1][0] > b[1][0] and n[1][1] > b[1][1]):
#---------------------------------------
# new_bounds are now within map window
# Show bounding box as a rectangle ?
# weight = line/stroke thickness
#---------------------------------------
# rectangle = Rectangle( bounds=b, fill=False, weight=4)
# ## fill_opacity=0.0, \ fill_color="#0033FF" )
# m.add_layer(rectangle)
#-----------------------
m.new_bounds = None # (remove target)
else:
# zoom out
m.zoom = m.zoom - 1
# zoom_out_to_new_bounds()
#--------------------------------------------------------------------
# def zoom_out_to_new_bounds_v0(self, caller_obj=None):
#
# [bb_minlon, bb_minlat, bb_maxlon, bb_maxlat] = \
# self.get_map_bounds( FROM_MAP = False )
# bb_midlon = (bb_minlon + bb_maxlon) / 2
# bb_midlat = (bb_minlat + bb_maxlat) / 2
# bb_center = ( bb_midlat, bb_midlon )
# print('bb_minlon, bb_maxlon =', bb_minlon, bb_maxlon)
# print('bb_minlat, bb_maxlat =', bb_minlat, bb_maxlat)
# zoom = self.map_window.max_zoom # (usually 18)
# zoom = zoom - 1
# ## print('max_zoom =', self.map_window.max_zoom)
#
# self.map_window.center = bb_center
# self.map_window.zoom = zoom
# print('map_window.bounds =', self.map_window.bounds )
# # bounds is read-only
# ## self.map_window.bounds = ((bb_midlat,bb_midlon),(bb_midlat,bb_midlon))
# while (True):
# # time.sleep(0.5) ######
# [minlon, minlat, maxlon, maxlat] = self.get_map_bounds()
# print('minlon, maxlon =', minlon, maxlon )
# print('minlat, maxlat =', minlat, maxlat )
# if (minlon < bb_minlon) and (maxlon > bb_maxlon) and \
# (minlat < bb_minlat) and (maxlat > bb_maxlat):
# break
# else:
# zoom -= 1
# if (zoom > 0):
# print('zoom =', zoom)
# self.map_window.zoom = zoom
# else:
# break
#
# [minlon, minlat, maxlon, maxlat] = self.get_map_bounds()
# print('minlon, maxlon =', minlon, maxlon )
# print('minlat, maxlat =', minlat, maxlat )
# if (minlon < bb_minlon) and (maxlon > bb_maxlon) and \
# (minlat < bb_minlat) and (maxlat > bb_maxlat):
# break
# else:
# zoom -= 1
# if (zoom > 0):
# print('zoom =', zoom)
# self.map_window.zoom = zoom
# else:
# break
#
# # zoom_out_to_new_bounds_v0
#--------------------------------------------------------------------
def get_url_dir_filenames(self):
#-----------------------------------------
# Construct a list of filenames that are
# available in the opendap url directory
#-----------------------------------------
r = requests.get( self.data_url_dir.value )
lines = r.text.splitlines()
# n_lines = len(lines)
filenames = list()
for line in lines:
if (".nc<" in line) or (".nc.gz<" in line):
parts = line.split('"')
filename = parts[1].replace('.dmr.html', '')
filenames.append( filename )
return filenames
# get_url_dir_filenames()
#--------------------------------------------------------------------
def get_url_dir_filenames_OLD(self):
#-----------------------------------------
# Construct a list of filenames that are
# available in the opendap url directory
#-----------------------------------------
r = requests.get( self.data_url_dir.value )
lines = r.text.splitlines()
# n_lines = len(lines)
filenames = list()
for line in lines:
if ('"sameAs": "http://' in line) and ('www' not in line):
line = line.replace('.html"', '')