class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.title = "Image Viewer"
self.setWindowTitle(self.title)
self.lastY = 0
self.image = QImage(2080, 1, QImage.Format.Format_Grayscale8)
self.label = QLabel(self)
self.resize (2080, 500)
def updateImage(self, x, y, c):
if not self.lastY == y:
self.image = self.image.copy(0, 0, 2080, y+1)
self.lastY = y
self.image.setPixelColor(x,y,QColor(c,c,c))
def refreshImage(self):
pixmap = QPixmap.fromImage(self.image)
self.label.setPixmap(pixmap)
self.setCentralWidget(self.label)
def saveImage(self):
name = time.strftime("%Y %m %d-%H %M %S")
self.image.save('NOAA ' + str(name) + '.png')
def test_sanity(tmp_path):
# Segfault test
app = QApplication([])
ex = Example()
assert app # Silence warning
assert ex # Silence warning
for mode in ("1", "RGB", "RGBA", "L", "P"):
# to QPixmap
im = hopper(mode)
data = ImageQt.toqpixmap(im)
assert isinstance(data, QPixmap)
assert not data.isNull()
# Test saving the file
tempfile = str(tmp_path / f"temp_{mode}.png")
data.save(tempfile)
# Render the image
qimage = ImageQt.ImageQt(im)
data = QPixmap.fromImage(qimage)
qt_format = QImage.Format if ImageQt.qt_version == "6" else QImage
qimage = QImage(128, 128, qt_format.Format_ARGB32)
painter = QPainter(qimage)
image_label = QLabel()
image_label.setPixmap(data)
image_label.render(painter, QPoint(0, 0), QRegion(0, 0, 128, 128))
painter.end()
rendered_tempfile = str(tmp_path / f"temp_rendered_{mode}.png")
qimage.save(rendered_tempfile)
assert_image_equal_tofile(im.convert("RGBA"), rendered_tempfile)
# from QPixmap
roundtrip(hopper(mode))
app.quit()
app = None
class imageLabel(QLabel):
"""Subclass of QLabel for displaying image"""
def __init__(self, parent, image=None):
super().__init__(parent)
self.parent = parent
self.image = QImage()
#self.image = "images/parrot.png"
#self.original_image = self.image.copy
self.original_image = self.image
self.rubber_band = QRubberBand(QRubberBand.Shape.Rectangle, self)
# setBackgroundRole() will create a bg for the image
#self.setBackgroundRole(QPalette.Base)
self.setSizePolicy(QSizePolicy.Policy.Ignored,
QSizePolicy.Policy.Ignored)
self.setScaledContents(True)
# Load image
self.setPixmap(QPixmap().fromImage(self.image))
self.setAlignment(Qt.Alignment.AlignCenter)
def openImage(self):
"""Load a new image into the """
image_file, _ = QFileDialog.getOpenFileName(
self, "Open Image", "",
"PNG Files (*.png);;JPG Files (*.jpeg *.jpg );;Bitmap Files (*.bmp);;\
GIF Files (*.gif)")
if image_file:
# Reset values when opening an image
self.parent.zoom_factor = 1
#self.parent.scroll_area.setVisible(True)
self.parent.print_act.setEnabled(True)
self.parent.updateActions()
# Reset all sliders
self.parent.brightness_slider.setValue(0)
# Get image format
image_format = self.image.format()
self.image = QImage(image_file)
self.original_image = self.image.copy()
#pixmap = QPixmap(image_file)
self.setPixmap(QPixmap().fromImage(self.image))
#image_size = self.image_label.sizeHint()
self.resize(self.pixmap().size())
#self.scroll_area.setMinimumSize(image_size)
#self.image_label.setPixmap(pixmap.scaled(self.image_label.size(),
# Qt.KeepAspectRatio, Qt.SmoothTransformation))
elif image_file == "":
# User selected Cancel
pass
else:
QMessageBox.information(self, "Error", "Unable to open image.",
QMessageBox.Ok)
def saveImage(self):
"""Save the image displayed in the label."""
#TODO: Add different functionality for the way in which the user can save their image.
if self.image.isNull() == False:
image_file, _ = QFileDialog.getSaveFileName(
self, "Save Image", "",
"PNG Files (*.png);;JPG Files (*.jpeg *.jpg );;Bitmap Files (*.bmp);;\
GIF Files (*.gif)")
if image_file and self.image.isNull() == False:
self.image.save(image_file)
else:
QMessageBox.information(self, "Error", "Unable to save image.",
QMessageBox.Ok)
else:
QMessageBox.information(self, "Empty Image",
"There is no image to save.",
QMessageBox.Ok)
def clearImage(self):
""" """
#TODO: If image is not null ask to save image first.
pass
def revertToOriginal(self):
"""Revert the image back to original image."""
#TODO: Display message dialohg to confirm actions
self.image = self.original_image
self.setPixmap(QPixmap().fromImage(self.image))
self.repaint()
#self.parent.zoom_factor = 1
def resizeImage(self):
"""Resize image."""
#TODO: Resize image by specified size
if self.image.isNull() == False:
resize = QTransform().scale(0.5, 0.5)
pixmap = QPixmap(self.image)
resized_image = pixmap.transformed(resize,
mode=Qt.SmoothTransformation)
#rotated = pixmap.trueMatrix(transform90, pixmap.width, pixmap.height)
#self.image_label.setPixmap(rotated)
#self.image_label.setPixmap(rotated.scaled(self.image_label.size(),
# Qt.KeepAspectRatio, Qt.SmoothTransformation))
self.image = QImage(resized_image)
self.setPixmap(resized_image)
#self.image = QPixmap(rotated)
self.setScaledContents(True)
self.repaint() # repaint the child widget
else:
# No image to rotate
pass
def cropImage(self):
"""Crop selected portions in the image."""
if self.image.isNull() == False:
rect = QRect(10, 20, 400, 200)
original_image = self.image
cropped = original_image.copy(rect)
self.image = QImage(cropped)
self.setPixmap(QPixmap().fromImage(cropped))
def rotateImage90(self, direction):
"""Rotate image 90º clockwise or counterclockwise."""
if self.image.isNull() == False:
if direction == "cw":
transform90 = QTransform().rotate(90)
elif direction == "ccw":
transform90 = QTransform().rotate(-90)
pixmap = QPixmap(self.image)
#TODO: Try flipping the height/width when flipping the image
rotated = pixmap.transformed(transform90,
mode=Qt.SmoothTransformation)
self.resize(self.image.height(), self.image.width())
#rotated = pixmap.trueMatrix(transform90, pixmap.width, pixmap.height)
#self.image_label.setPixmap(rotated.scaled(self.image_label.size(),
# Qt.KeepAspectRatio, Qt.SmoothTransformation))
self.image = QImage(rotated)
#self.setPixmap(rotated)
self.setPixmap(
rotated.scaled(self.size(), Qt.KeepAspectRatioByExpanding,
Qt.SmoothTransformation))
self.repaint() # repaint the child widget
else:
# No image to rotate
pass
def flipImage(self, axis):
"""
Mirror the image across the horizontal axis.
"""
if self.image.isNull() == False:
if axis == "horizontal":
flip_h = QTransform().scale(-1, 1)
pixmap = QPixmap(self.image)
flipped = pixmap.transformed(flip_h)
elif axis == "vertical":
flip_v = QTransform().scale(1, -1)
pixmap = QPixmap(self.image)
flipped = pixmap.transformed(flip_v)
#self.image_label.setPixmap(flipped)
#self.image_label.setPixmap(flipped.scaled(self.image_label.size(),
# Qt.KeepAspectRatio, Qt.SmoothTransformation))
self.image = QImage(flipped)
self.setPixmap(flipped)
#self.image = QPixmap(flipped)
self.repaint()
else:
# No image to flip
pass
def convertToGray(self):
"""Convert image to grayscale."""
if self.image.isNull() == False:
converted_img = self.image.convertToFormat(
QImage.Format_Grayscale16)
#self.image = converted_img
self.image = QImage(converted_img)
self.setPixmap(QPixmap().fromImage(converted_img))
self.repaint()
def convertToRGB(self):
"""Convert image to RGB format."""
if self.image.isNull() == False:
converted_img = self.image.convertToFormat(QImage.Format_RGB32)
#self.image = converted_img
self.image = QImage(converted_img)
self.setPixmap(QPixmap().fromImage(converted_img))
self.repaint()
def convertToSepia(self):
"""Convert image to sepia filter."""
#TODO: Sepia #704214 rgb(112, 66, 20)
#TODO: optimize speed that the image converts, or add to thread
if self.image.isNull() == False:
for row_pixel in range(self.image.width()):
for col_pixel in range(self.image.height()):
current_val = QColor(self.image.pixel(
row_pixel, col_pixel))
# Calculate r, g, b values for current pixel
red = current_val.red()
green = current_val.green()
blue = current_val.blue()
new_red = int(0.393 * red + 0.769 * green + 0.189 * blue)
new_green = int(0.349 * red + 0.686 * green + 0.168 * blue)
new_blue = int(0.272 * red + 0.534 * green + 0.131 * blue)
# Set the new RGB values for the current pixel
if new_red > 255:
red = 255
else:
red = new_red
if new_green > 255:
green = 255
else:
green = new_green
if new_blue > 255:
blue = 255
else:
blue = new_blue
new_value = qRgb(red, green, blue)
self.image.setPixel(row_pixel, col_pixel, new_value)
self.setPixmap(QPixmap().fromImage(self.image))
self.repaint()
def changeBrighteness(self, value):
#TODO: Reset the value of brightness, remember the original values
# as going back to 0, i.e. keep track of original image's values
#TODO: modify values based on original image
if (value < -255 | value > 255):
return self.image
for row_pixel in range(self.image.width()):
for col_pixel in range(self.image.height()):
current_val = QColor(self.image.pixel(row_pixel, col_pixel))
red = current_val.red()
green = current_val.green()
blue = current_val.blue()
new_red = red + value
new_green = green + value
new_blue = blue + value
# Set the new RGB values for the current pixel
if new_red > 255:
red = 255
elif new_red < 0:
red = 0
else:
red = new_red
if new_green > 255:
green = 255
elif new_green < 0:
green = 0
else:
green = new_green
if new_blue > 255:
blue = 255
elif new_blue < 0:
blue = 0
else:
blue = new_blue
new_value = qRgb(red, green, blue)
self.image.setPixel(row_pixel, col_pixel, new_value)
self.setPixmap(QPixmap().fromImage(self.image))
def changeContrast(self, contrast):
"""Change the contrast of the pixels in the image.
Contrast is the difference between max and min pixel intensity."""
for row_pixel in range(self.image.width()):
for col_pixel in range(self.image.height()):
# Calculate a contrast correction factor
factor = float(259 * (contrast + 255) / (255 *
(259 - contrast)))
current_val = QColor(self.image.pixel(row_pixel, col_pixel))
red = current_val.red()
green = current_val.green()
blue = current_val.blue()
new_red = factor * (red - 128) + 128
new_green = factor * (green - 128) + 128
new_blue = factor * (blue - 128) + 128
new_value = qRgb(new_red, new_green, new_blue)
self.image.setPixel(row_pixel, col_pixel, new_value)
self.setPixmap(QPixmap().fromImage(self.image))
def changeHue(self):
for row_pixel in range(self.image.width()):
for col_pixel in range(self.image.height()):
current_val = QColor(self.image.pixel(row_pixel, col_pixel))
hue = current_val.hue()
current_val.setHsv(hue, current_val.saturation(),
current_val.value(), current_val.alpha())
self.image.setPixelColor(row_pixel, col_pixel, current_val)
self.setPixmap(QPixmap().fromImage(self.image))
def mousePressEvent(self, event):
"""Handle mouse press event."""
self.origin = event.pos()
if not (self.rubber_band):
self.rubber_band = QRubberBand(QRubberBand.Rectangle, self)
self.rubber_band.setGeometry(QRect(self.origin, QSize()))
self.rubber_band.show()
#print(self.rubber_band.height())
print(self.rubber_band.x())
def mouseMoveEvent(self, event):
"""Handle mouse move event."""
self.rubber_band.setGeometry(
QRect(self.origin, event.pos()).normalized())
def mouseReleaseEvent(self, event):
"""Handle when the mouse is released."""
self.rubber_band.hide()