''' Created on 12 Jan 2015 @author: Mr. Srikanth Nagella ''' # pylint: disable=E1103 # pylint: disable=no-name-in-module from netCDF4 import Dataset from mpl_toolkits.basemap import Basemap, cm import numpy as np from .selection_editor import PolygonEditor, BoxEditor import os.path from PyQt4.QtCore import pyqtSignal, pyqtSlot, Qt from .nemo_bdy_mask import Mask import logging from PyQt4.QtGui import QSizePolicy from matplotlib.colors import Normalize mask_alpha = 0.3 from PyQt4 import QtGui import matplotlib.pyplot as plt from matplotlib.figure import Figure from matplotlib.path import Path from matplotlib.transforms import Bbox from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas from matplotlib.backends.backend_qt4agg import NavigationToolbar2QT as NavigationToolbar # pylint: disable=E1002 class MatplotlibWidget(QtGui.QWidget): """This class is a QWidget for pyNEMO mask plot""" min_depth = 200.0 shelfbreak_dist = 200.0 mask_type = 0 def __init__(self, parent=None, mask=None, min_depth = 200.0, shelfbreak_dist = 200.0,*args, **kwargs): """ Initialises the mask, matplot and the navigation toolbar """ super(MatplotlibWidget, self).__init__(parent) #QtGui.QWidget.__init__(self, parent) self.figure = Figure(*args, **kwargs) self.canvas = FigureCanvas(self.figure) self.mask = mask self.min_depth = min_depth self.shelfbreak_dist = shelfbreak_dist if self.mask is not None: self.mask.min_depth = min_depth self.mask.shelfbreak_dist = shelfbreak_dist self.toolbar = NemoNavigationToolbar(self.canvas, self) self.toolbar.locLabel.setMinimumWidth(100) self.toolbar.locLabel.setMaximumWidth(170) self.toolbar.locLabel.setSizePolicy(QSizePolicy.Fixed,QSizePolicy.Fixed) self.toolbar.locLabel.setAlignment(Qt.AlignLeft|Qt.AlignTop) self.toolbar.drawing_tool.connect(self.drawing_tool_callback) self.axes = self.figure.add_subplot(111) self.cbar = None layout = QtGui.QVBoxLayout() layout.addWidget(self.toolbar) layout.addWidget(self.canvas) self.setLayout(layout) self._drawing_tool = None self._drawing_tool_name = None self.create_basemap() @pyqtSlot(str) def drawing_tool_callback(self, toolname): """ callback for the drawing tool when the signal of change of drawing tool is received""" if self._drawing_tool_name != None and toolname == "": #if tool is disabled self._drawing_tool.disable() self._drawing_tool_name = None self._drawing_tool = None self.canvas.draw() else: self._drawing_tool_name = toolname if self._drawing_tool_name == "freehand": #if freehand tool is enabled self._drawing_tool = PolygonEditor(self.axes, self.canvas) self.canvas.draw() elif self._drawing_tool_name == "rectangle": #if rectange tool is enabled self._drawing_tool = BoxEditor(self.axes, self.canvas) self._drawing_tool.enable() self.canvas.draw() def create_basemap(self): """ Draws the basemap and contour with mask information""" if self.mask == None: return x = np.arange(0, self.mask.lon.shape[0]) y = np.arange(0, self.mask.lon.shape[1]) x_vals, y_vals = np.meshgrid(y, x) Z = self.mask.bathy_data[...].astype(np.float64) #Z[Z==0] = np.nan Z = np.ma.masked_where(Z==0, Z) cmap = plt.get_cmap('GnBu') cmap.set_bad('0.0') cmap.set_under('black',1.0) cmap.set_over('black',1.0) transcmap = plt.get_cmap('autumn') transcmap.set_bad(alpha=0.5) masklayer = np.ma.masked_where(self.mask.data==-1,self.mask.data) extent = (0, self.mask.lon.shape[1],0, self.mask.lon.shape[0]) #cax = self.axes.pcolormesh(x_vals, y_vals, Z, cmap=cmap)#, extend='min')#cmap=plt.get_cmap('GnBu'))#cmap=cm.s3pcpn) cax = self.axes.imshow(Z, cmap = cmap, origin="lower",extent=extent,aspect='auto') #self.axes.contourf(x_vals, y_vals, masklayer, [-2, -1, 0, 1, 2], cmap=transcmap,\ # alpha=mask_alpha) self.axes.imshow(masklayer, cmap=transcmap,alpha=0.3,origin="lower",extent=extent,aspect='auto') zmin = np.amin(Z) zmax = np.amax(Z) if self.cbar is not None: self.cbar.remove() self.cbar = self.figure.colorbar(cax,ticks=np.linspace(zmin,zmax,10),orientation='horizontal') self.cbar.set_label("Bathymetry (units=%s)"%self.mask.data_units) self.canvas.draw() def reset_mask(self): if self.mask == None: return self.mask.reset_mask() self.axes.clear() self.create_basemap() def add_mask(self): """ adds the selected region in the drawing tool to the mask """ if self._drawing_tool_name != "" and self.mask != None: if self._drawing_tool.polygon != None: x = np.arange(0, self.mask.lon.shape[0]) y = np.arange(0, self.mask.lon.shape[1]) x_vals, y_vals = np.meshgrid(y, x) grid = list(zip(x_vals.ravel(), y_vals.ravel())) self._drawing_tool.polygon.set_linewidth(1.0) p_path = Path(self._drawing_tool.polygon.xy) index = p_path.contains_points(grid) index = index.reshape(self.mask.lon.shape) xmin, ymin = np.min(self._drawing_tool.polygon.xy, axis=0) xmax, ymax = np.max(self._drawing_tool.polygon.xy, axis=0) self.mask.add_mask(index,[xmin,xmax,ymin,ymax]) self._drawing_tool.reset() self.axes.clear() self.create_basemap() def remove_mask(self): """ removes the selected region in the drawing tool from the mask """ if self._drawing_tool_name != "" and self.mask != None: if self._drawing_tool.polygon != None: x = np.arange(0, self.mask.lon.shape[0]) y = np.arange(0, self.mask.lon.shape[1]) x_vals, y_vals = np.meshgrid(y, x) grid = list(zip(x_vals.ravel(), y_vals.ravel())) #check for the index self._drawing_tool.polygon.set_linewidth(1.0) p_path = Path(self._drawing_tool.polygon.xy) index = p_path.contains_points(grid) index = index.reshape(self.mask.lon.shape) xmin, ymin = np.min(self._drawing_tool.polygon.xy, axis=0) xmax, ymax = np.max(self._drawing_tool.polygon.xy, axis=0) self.mask.remove_mask(index,[xmin,xmax,ymin,ymax]) self._drawing_tool.reset() self.axes.clear() self.create_basemap() def apply_border_mask(self): """ This applies an mask of given number of pixels at the border of the mask""" pixels, ok_btn_pressed = QtGui.QInputDialog.getText(self, 'Mask: Border Input', 'Enter number of pixel of border \ to be added to mask:') if ok_btn_pressed: self.mask.apply_border_mask(int(pixels)) self.axes.clear() self.create_basemap() def set_mask_type(self,type): """ Sets the mask type """ self.mask_type = type self.mask.mask_type = type @pyqtSlot(str, str) def set_bathymetry_file(self, bathymetry_filename, mask_file): """ Set the bathymetry file """ try: self.mask = Mask(bathymetry_filename, mask_file, self.min_depth, self.shelfbreak_dist) self.mask.mask_type = self.mask_type self.create_basemap() except RuntimeError: pass # couldn't set the new file name @pyqtSlot(str) def save_mask_file(self, mask_file): """ Save the mask data to mask_file """ if self.mask is not None: self.mask.save_mask(mask_file) @pyqtSlot(float, float) def set_mask_settings(self, min_depth, shelfbreak_dist): """ Mask settings update """ self.min_depth = min_depth self.shelfbreak_dist = shelfbreak_dist self.mask.min_depth = min_depth self.mask.shelfbreak_dist = shelfbreak_dist class NemoNavigationToolbar(NavigationToolbar): """ This is custom toolbar for the nemo which includes additional buttons for drawing tool and (add,remove) for mask in addtion to default NavigationToolbar provided by matplotlib """ drawing_tool = pyqtSignal(str) #signal for the drawing tool changed def __init__(self, canvas, parent): """ Initialises the toolbar """ self.toolitems = (('Home', 'Reset original view', 'home', 'home'),\ ('Back', 'Back to previous view', 'back', 'back'),\ ('Forward', 'Forward to next view', 'forward', 'forward'),\ (None, None, None, None),\ ('Pan', 'Pan axes with left mouse, zoom with right', 'move', 'pan'),\ ('Zoom', 'Zoom to rectangle', 'zoom_to_rect', 'zoom'),\ ('Reset', 'Reset the mask', 'reset','reset'),\ (None, None, None, None),\ ('Freehand', 'Freehand drawing', 'freehand', 'freehand'),\ ('Rectangle', 'Rectangle drawing', 'rectangle', 'rectangle'),\ ('Border', 'Border selection', 'border', 'border'),\ ('plus', 'Add mask', 'add_mask', 'add_mask'),\ ('minus', 'Remove mask', 'remove_mask', 'remove_mask'),\ (None, None, None, None),\ ('Normal','Normal Mask','normal_mask','normal_mask'),\ ('MaxDepth', 'Max Depth Mask', 'max_depth_mask', 'max_depth_mask'),\ ('ShelfBreak','Shelf Break Mask','shelf_break_mask','shelf_break_mask'),\ (None, None, None, None)\ ) NavigationToolbar.__init__(self, canvas, parent) self._actions['reset'].setIcon(set_icon('reset.png')) self._actions['freehand'].setCheckable(True) self._actions['freehand'].setIcon(set_icon('freehand.png')) self._actions['rectangle'].setCheckable(True) self._actions['rectangle'].setIcon(set_icon('rectangle.png')) self._actions['border'].setIcon(set_icon('border.png')) self._actions['add_mask'].setIcon(set_icon('plus.png')) self._actions['remove_mask'].setIcon(set_icon('minus.png')) self._actions['normal_mask'].setIcon((set_icon('all_mask.png'))) self._actions['normal_mask'].setCheckable(True) self._actions['max_depth_mask'].setIcon((set_icon('max_depth.png'))) self._actions['max_depth_mask'].setCheckable(True) self._actions['shelf_break_mask'].setIcon((set_icon('shelf_break.png'))) self._actions['shelf_break_mask'].setCheckable(True) self.update_height_mask(0) def reset(self, *dummy): """ Callback for reset button clicked""" self.parent.reset_mask() def freehand(self, *dummy): """ callback for freehand button clicked """ if self._actions['freehand'].isChecked() == True: if self._active == "PAN": self.pan() elif self._active == "ZOOM": self.zoom() elif self._actions['rectangle'].isChecked() == True: self._actions['rectangle'].setChecked(False) self.drawing_tool.emit("") # clear the rectangle selector self._active = None self.drawing_tool.emit('freehand') self._update_buttons_checked() else: self.drawing_tool.emit("") def rectangle(self, *dummy): """ callback for rectangel button clicked """ if self._actions['rectangle'].isChecked() == True: if self._active == "PAN": self.pan() elif self._active == "ZOOM": self.zoom() elif self._actions['freehand'].isChecked() == True: self._actions['freehand'].setChecked(False) self.drawing_tool.emit("") # clear the freehand selector self._active = None self.drawing_tool.emit('rectangle') self._update_buttons_checked() else: self.drawing_tool.emit("") def border(self, *dummy): """ callback for border button clicked """ self.parent.apply_border_mask() def add_mask(self, *dummy): """ callback for add mask button clicked """ self.parent.add_mask() def remove_mask(self, *dummy): """ callback for remove mask button clicked """ self.parent.remove_mask() def get_active_button(self): """ returns the current active button between freehand and rectangle""" if self._actions['rectangle'].isChecked() == True: return 'rectangle' elif self._actions['freehand'].isChecked() == True: return 'freehand' return None def normal_mask(self, *dummy): """ enable the normal mask button """ self.update_height_mask(0) def max_depth_mask(self, *dummy): """ enables the minimum height mask """ self.update_height_mask(1) def shelf_break_mask(self, *dummy): """ enables the shelf break mask button """ self.update_height_mask(2) def update_height_mask(self, btn_id): """ update the height mask buttons in the interface """ self._actions['normal_mask'].setChecked(False) self._actions['max_depth_mask'].setChecked(False) self._actions['shelf_break_mask'].setChecked(False) try: self.parent.set_mask_type(btn_id) except AttributeError: pass if btn_id == 0: self._actions['normal_mask'].setChecked(True) elif btn_id == 1: self._actions['max_depth_mask'].setChecked(True) elif btn_id == 2: self._actions['shelf_break_mask'].setChecked(True) def set_icon(name): """ Creates an icon based on the file found in the module directory with input name""" return QtGui.QIcon(os.path.join(os.path.dirname(__file__), name))