Source code for layer_viewer.layers.multi_channel_image_layer

from  . layer_base import LayerBase
from .. widgets import TrippleToggleEye, ToggleEye, FractionSelectionBar
from .. pixel_path import *
from . layer_controller import *
import pyqtgraph as pg
import os
from pyqtgraph.Qt import QtCore, QtGui
import numpy

###############################################################################
from builtins import range
#from past.utils import old_div
import warnings
from PyQt5.QtCore import pyqtSignal, Qt, QEvent, QRect, QSize, QTimer, QPoint, QItemSelectionModel
from PyQt5.QtGui import QPainter, QFontMetrics, QFont, QPalette, QMouseEvent, QPixmap
from PyQt5.QtWidgets import QStyledItemDelegate, QWidget, QListView, QStyle, \
                            QLabel, QGridLayout, QSpinBox, QApplication


  

[docs]class MultiChannelImageLayer(LayerBase):


[docs]    class CtrlWidget( LayerItemWidget ): 
        def __init__(self, name):
            super().__init__(name=name, add_gradient_widgtet=True, channel_selector=True)

            self.asRgb = QtGui.QCheckBox(  )
            self.asRgb.setToolTip("Show As RGB")
            self._layout.addWidget( self.asRgb, 3,0)
            



    def __init__(self, name, data=None, autoLevels=True, levels=None, autoHistogramRange=False, cmap=None):
        super().__init__(name=name) 

        self.current_channel = 0
        self.as_rgb = False
        self.m_data = data
        self.m_autoLevels = autoLevels
        self.m_levels = levels
        self.m_autoHistogramRange = autoHistogramRange
        self.m_image_item = pg.ImageItem()
        if self.m_data is not None:

            self.m_image_item.setImage(self.m_data[...,self.current_channel], autoLevels=self.m_autoLevels, 
                levels=self.m_levels)

        self.m_ctrl_widget =  MultiChannelImageLayer.CtrlWidget(name=self.name)
        self.viewer = None

        self.cmap = cmap 
        if self.cmap is not None:
            self.m_ctrl_widget.gradientWidget.loadPreset(self.cmap)


        # setup ctrl widget
        w = self.m_ctrl_widget
        if self.m_data is not None:
            w.channelSelector.setRange(0, self.m_data.shape[2]-1)
        w.toggleEye.setActive(True)

        def toogleEyeChanged(state):
            if self.viewer.m_exlusive_layer is not None:
                self.viewer.m_exlusive_layer.setVisible(True)
                self.viewer.m_exlusive_layer = None
            if state == 2:
                 self.viewer.showAndHideOthers(self.name)
            else:
                self.setVisible(bool(state))

        w.toggleEye.stateChanged.connect(toogleEyeChanged)



        def channelChanged(channel):
            if not self.as_rgb:
                self.current_channel = channel
                if self.m_data is not None:
                    self.m_image_item.setImage(self.m_data[...,self.current_channel], autoLevels=self.m_autoLevels, 
                        levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)
       

        w.channelSelector.valueChanged.connect(channelChanged)


        def asRgbChanged(as_rgb):
            self.as_rgb = bool(as_rgb)
            self.m_ctrl_widget.channelSelector.setEnabled(not self.as_rgb)
            self.m_ctrl_widget.gradientWidget.setEnabled(not self.as_rgb)
            if self.as_rgb:
                self.m_image_item.setLookupTable(None)
                self.m_image_item.setImage(self.m_data, autoLevels=self.m_autoLevels, 
                    levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)
            else:
                lut = w.gradientWidget.getLookupTable(512)
                self.m_image_item.setLookupTable(lut)
                self.m_image_item.setImage(self.m_data[...,self.current_channel], autoLevels=self.m_autoLevels, 
                    levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)


     

        w.asRgb.stateChanged.connect(asRgbChanged)



        w.bar.fractionChanged.connect(self.setOpacity)  

        def update():
            lut = w.gradientWidget.getLookupTable(512)
            self.m_image_item.setLookupTable(lut)
        w.gradientWidget.sigGradientChanged.connect(update)
        w.layer = self



[docs]    def ctrl_widget(self):

        return self.m_ctrl_widget

[docs]    def get_image_item(self):
        return self.m_image_item

[docs]    def setOpacity(self, opacity):
        self.m_ctrl_widget.setFraction(opacity)
        self.m_image_item.setOpacity(opacity)

[docs]    def setVisible(self, visible):
        self.m_ctrl_widget.toggleEye.setState(visible)
        self.m_image_item.setVisible(visible)


[docs]    def setZValue(self, z):
        self.m_image_item.setZValue(z)

[docs]    def updateData(self, image):
        self.m_data = image
        self.m_ctrl_widget.channelSelector.setRange(0, self.m_data.shape[2]-1)
        self.m_image_item.updateImage(image[...,self.current_channel])

[docs]    def setData(self, image):
        self.m_data = image
        
        if image is None:
            self.m_image_item.clear()
            # self.m_image_item.setImage(None, autoLevels=self.m_autoLevels, 
            #         levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)
        else:
            self.m_ctrl_widget.channelSelector.setRange(0, self.m_data.shape[2]-1)

            if self.as_rgb:
                self.m_image_item.setImage(image, autoLevels=self.m_autoLevels, 
                        levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)
            else:
                self.m_image_item.setImage(image[...,self.current_channel], autoLevels=self.m_autoLevels, 
                        levels=self.m_levels, autoHistogramRange=self.m_autoHistogramRange)