profilevisualization.py

# -*- coding: utf-8 -*-
"""
/***************************************************************************
                              HUB TimeSeriesViewer
                              -------------------
        begin                : 2017-08-04
        git sha              : $Format:%H$
        copyright            : (C) 2017 by HU-Berlin
        email                : benjamin.jakimow@geo.hu-berlin.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
"""
# noinspection PyPep8Naming
from __future__ import absolute_import
import os, sys, pickle, datetime
from collections import OrderedDict
from qgis.gui import *
from qgis.core import *
from PyQt4.QtCore import *
from PyQt4.QtXml import *
from PyQt4.QtGui import *

from timeseriesviewer import jp, SETTINGS
from timeseriesviewer.timeseries import *
from timeseriesviewer.utils import SpatialExtent, SpatialPoint, px2geo
from timeseriesviewer.ui.docks import TsvDockWidgetBase, loadUI
from timeseriesviewer.plotstyling import PlotStyle, PlotStyleButton
from timeseriesviewer.pixelloader import PixelLoader, PixelLoaderTask
from timeseriesviewer.sensorvisualization import SensorListModel

import pyqtgraph as pg
from pyqtgraph import functions as fn
from pyqtgraph import AxisItem


import datetime

from osgeo import gdal, gdal_array
import numpy as np

DEBUG = False

LABEL_DN = 'DN or Index'
LABEL_TIME = 'Date'


OPENGL_AVAILABLE = False

try:
    import OpenGL
    OPENGL_AVAILABLE = True
except:
    pass

def getTextColorWithContrast(c):
    assert isinstance(c, QColor)
    if c.lightness() < 0.5:
        return QColor('white')
    else:
        return QColor('black')

def bandIndex2bandKey(i):
    assert isinstance(i, int)
    assert i >= 0
    return 'b{}'.format(i + 1)

def bandKey2bandIndex(key):
    match = PlotSettingsModel.regBandKeyExact.search(key)
    assert match
    idx = int(match.group()[1:]) - 1
    return idx


class DateTimeAxis(pg.AxisItem):

    def __init__(self, *args, **kwds):
        super(DateTimeAxis, self).__init__(*args, **kwds)

    def logTickStrings(self, values, scale, spacing):
        s = ""


    def tickStrings(self, values, scale, spacing):
        strns = []

        if len(values) == 0:
            return []
        #assert isinstance(values[0],
        values = [num2date(v) for v in values]
        rng = max(values)-min(values)
        ndays = rng.astype(int)

        strns = []

        for v in values:
            if ndays == 0:
                strns.append(v.astype(str))
            else:
                strns.append(v.astype(str))

        return strns

    def tickValues(self, minVal, maxVal, size):
        d = super(DateTimeAxis, self).tickValues(minVal, maxVal, size)

        return d





class _SensorPoints(pg.PlotDataItem):
    def __init__(self, *args, **kwds):
        super(_SensorPoints, self).__init__(*args, **kwds)
        # menu creation is deferred because it is expensive and often
        # the user will never see the menu anyway.
        self.menu = None

    def boundingRect(self):
        return super(_SensorPoints,self).boundingRect()

    def paint(self, p, *args):
        super(_SensorPoints, self).paint(p, *args)


    # On right-click, raise the context menu
    def mouseClickEvent(self, ev):
        if ev.button() == QtCore.Qt.RightButton:
            if self.raiseContextMenu(ev):
                ev.accept()

    def raiseContextMenu(self, ev):
        menu = self.getContextMenus()

        # Let the scene add on to the end of our context menu
        # (this is optional)
        menu = self.scene().addParentContextMenus(self, menu, ev)

        pos = ev.screenPos()
        menu.popup(QtCore.QPoint(pos.x(), pos.y()))
        return True

    # This method will be called when this item's _children_ want to raise
    # a context menu that includes their parents' menus.
    def getContextMenus(self, event=None):
        if self.menu is None:
            self.menu = QMenu()
            self.menu.setTitle(self.name + " options..")

            green = QAction("Turn green", self.menu)
            green.triggered.connect(self.setGreen)
            self.menu.addAction(green)
            self.menu.green = green

            blue = QAction("Turn blue", self.menu)
            blue.triggered.connect(self.setBlue)
            self.menu.addAction(blue)
            self.menu.green = blue

            alpha = QWidgetAction(self.menu)
            alphaSlider = QSlider()
            alphaSlider.setOrientation(QtCore.Qt.Horizontal)
            alphaSlider.setMaximum(255)
            alphaSlider.setValue(255)
            alphaSlider.valueChanged.connect(self.setAlpha)
            alpha.setDefaultWidget(alphaSlider)
            self.menu.addAction(alpha)
            self.menu.alpha = alpha
            self.menu.alphaSlider = alphaSlider
        return self.menu


class TemporalProfilePlotDataItem(pg.PlotDataItem):

    def __init__(self, plotStyle, parent=None):
        assert isinstance(plotStyle, TemporalProfilePlotStyle)


        super(TemporalProfilePlotDataItem, self).__init__([], [], parent=parent)
        self.mPlotStyle = plotStyle
        self.mPlotStyle.sigUpdated.connect(self.updateDataAndStyle)
        self.updateStyle()

    def updateDataAndStyle(self):

        TP = self.mPlotStyle.temporalProfile()
        sensor = self.mPlotStyle.sensor()

        if isinstance(TP, TemporalProfile) and isinstance(sensor, SensorInstrument):
            x, y = TP.dataFromExpression(self.mPlotStyle.sensor(), self.mPlotStyle.expression())
            x =  np.asarray(x, dtype=np.float)
            y = np.asarray(y, dtype=np.float)