def create_graphics(self):
#self.img_histogram_LUT = pg.HistogramLUTItem(self.data_img_item)
if self.orientation == 'horizontal':
self.img_view_box = self.pg_layout.addViewBox(1, 0)
#create the item handling the Data img
self.data_img_item = pg.ImageItem()
self.img_view_box.addItem(self.data_img_item)
self.img_histogram_LUT = HorHistogramLUTItem(self.data_img_item)
self.pg_layout.addItem(self.img_histogram_LUT, 0, 0)
elif self.orientation == 'vertical':
self.img_view_box = self.pg_layout.addViewBox(0, 0)
#create the item handling the Data img
self.data_img_item = pg.ImageItem()
self.img_view_box.addItem(self.data_img_item)
self.img_histogram_LUT = HorHistogramLUTItem(self.data_img_item, orientation='vertical')
# self.img_histogram_LUT.axis.hide()
self.pg_layout.addItem(self.img_histogram_LUT, 0, 1)
self.img_view_box.setAspectLocked()
class ImgView(QtCore.QObject):
mouse_moved = QtCore.pyqtSignal(float, float)
mouse_left_clicked = QtCore.pyqtSignal(float, float)
mouse_left_double_clicked = QtCore.pyqtSignal(float, float)
def __init__(self, pg_layout, orientation='vertical'):
super(ImgView, self).__init__()
self.pg_layout = pg_layout
self.orientation = orientation
self.create_graphics()
self.create_scatter_plot()
self.modify_mouse_behavior()
self.img_data = None
self.mask_data = None
def create_graphics(self):
#self.img_histogram_LUT = pg.HistogramLUTItem(self.data_img_item)
if self.orientation == 'horizontal':
self.img_view_box = self.pg_layout.addViewBox(1, 0)
#create the item handling the Data img
self.data_img_item = pg.ImageItem()
self.img_view_box.addItem(self.data_img_item)
self.img_histogram_LUT = HorHistogramLUTItem(self.data_img_item)
self.pg_layout.addItem(self.img_histogram_LUT, 0, 0)
elif self.orientation == 'vertical':
self.img_view_box = self.pg_layout.addViewBox(0, 0)
#create the item handling the Data img
self.data_img_item = pg.ImageItem()
self.img_view_box.addItem(self.data_img_item)
self.img_histogram_LUT = HorHistogramLUTItem(self.data_img_item, orientation='vertical')
# self.img_histogram_LUT.axis.hide()
self.pg_layout.addItem(self.img_histogram_LUT, 0, 1)
self.img_view_box.setAspectLocked()
def create_scatter_plot(self):
self.img_scatter_plot_item = pg.ScatterPlotItem(pen=pg.mkPen('w'), brush=pg.mkBrush('r'))
self.img_view_box.addItem(self.img_scatter_plot_item)
def plot_image(self, img_data, autoRange=False):
self.img_data = img_data
self.data_img_item.setImage(img_data.T, autoRange)
if autoRange:
self.auto_range()
def save_img(self, filename):
exporter = ImageExporter(self.img_view_box)
exporter.parameters()['width'] = 2048
exporter.export(filename)
def auto_range(self):
hist_x, hist_y = self.data_img_item.getHistogram()
ind = np.where(np.cumsum(hist_y) < (0.995 * np.sum(hist_y)))
if len(ind[0]):
self.img_histogram_LUT.setLevels(np.min(np.min(self.img_data)), hist_x[ind[0][-1]])
else:
self.img_histogram_LUT.setLevels(np.min(np.min(self.img_data)), 0.5 * np.max(hist_x))
def add_scatter_data(self, x, y):
self.img_scatter_plot_item.addPoints(x=y, y=x)
def clear_scatter_plot(self):
self.img_scatter_plot_item.setData(x=None, y=None)
def hide_scatter_plot(self):
self.img_scatter_plot_item.hide()
def show_scatter_plot(self):
self.img_scatter_plot_item.show()
def mouseMoved(self, pos):
pos = self.data_img_item.mapFromScene(pos)
self.mouse_moved.emit(pos.x(), pos.y())
def modify_mouse_behavior(self):
#different mouse handlers
self.img_view_box.setMouseMode(self.img_view_box.RectMode)
self.pg_layout.scene().sigMouseMoved.connect(self.mouseMoved)
self.img_view_box.mouseClickEvent = self.myMouseClickEvent
self.img_view_box.mouseDragEvent = self.myMouseDragEvent
self.img_view_box.mouseDoubleClickEvent = self.myMouseDoubleClickEvent
self.img_view_box.wheelEvent = self.myWheelEvent
def myMouseClickEvent(self, ev):
if ev.button() == QtCore.Qt.RightButton or \
(ev.button() == QtCore.Qt.LeftButton and \
ev.modifiers() & QtCore.Qt.ControlModifier):
view_range = np.array(self.img_view_box.viewRange()) * 2
if self.img_data is not None:
if (view_range[0][1] - view_range[0][0]) > self.img_data.shape[1] and \
(view_range[1][1] - view_range[1][0]) > self.img_data.shape[0]:
self.img_view_box.autoRange()
else:
self.img_view_box.scaleBy(2)
elif ev.button() == QtCore.Qt.LeftButton:
pos = self.img_view_box.mapFromScene(ev.pos())
pos = self.img_scatter_plot_item.mapFromScene(2 * ev.pos() - pos)
y = pos.x()
x = pos.y()
self.mouse_left_clicked.emit(x, y)
def myMouseDoubleClickEvent(self, ev):
if ev.button() == QtCore.Qt.RightButton:
self.img_view_box.autoRange()
if ev.button() == QtCore.Qt.LeftButton:
pos = self.img_view_box.mapFromScene(ev.pos())
pos = self.img_scatter_plot_item.mapFromScene(2 * ev.pos() - pos)
self.mouse_left_double_clicked.emit(pos.x(), pos.y())
def myMouseDragEvent(self, ev, axis=None):
#most of this code is copied behavior of left click mouse drag from the original code
ev.accept()
pos = ev.pos()
lastPos = ev.lastPos()
dif = pos - lastPos
dif *= -1
## Ignore axes if mouse is disabled
mouseEnabled = np.array(self.img_view_box.state['mouseEnabled'], dtype=np.float)
mask = mouseEnabled.copy()
if axis is not None:
mask[1 - axis] = 0.0
if ev.button() == QtCore.Qt.RightButton or \
(ev.button() == QtCore.Qt.LeftButton and \
ev.modifiers() & QtCore.Qt.ControlModifier):
#determine the amount of translation
tr = dif * mask
tr = self.img_view_box.mapToView(tr) - self.img_view_box.mapToView(pg.Point(0, 0))
x = tr.x()
y = tr.y()
self.img_view_box.translateBy(x=x, y=y)
self.img_view_box.sigRangeChangedManually.emit(self.img_view_box.state['mouseEnabled'])
else:
pg.ViewBox.mouseDragEvent(self.img_view_box, ev)
def myWheelEvent(self, ev):
if ev.delta() > 0:
pg.ViewBox.wheelEvent(self.img_view_box, ev)
else:
view_range = np.array(self.img_view_box.viewRange())
if self.img_data is not None:
if (view_range[0][1] - view_range[0][0]) > self.img_data.shape[1] and \
(view_range[1][1] - view_range[1][0]) > self.img_data.shape[0]:
self.img_view_box.autoRange()
else:
pg.ViewBox.wheelEvent(self.img_view_box, ev)
else:
pg.ViewBox.wheelEvent(self.img_view_box, ev)
