def get_icon_html(icon: QIcon, size: QSize) -> str:
"""
Transform an icon to html <img> tag.
"""
if not size.isValid():
return ""
if size.width() < 0 or size.height() < 0:
size = QSize(16, 16) # just in case
byte_array = QByteArray()
buffer = QBuffer(byte_array)
buffer.open(QIODevice.WriteOnly)
pixmap = icon.pixmap(size)
if pixmap.isNull():
return ""
pixmap.save(buffer, "PNG")
buffer.close()
dpr = pixmap.devicePixelRatioF()
if dpr != 1.0:
size_ = pixmap.size() / dpr
size_part = ' width="{}" height="{}"'.format(
int(math.floor(size_.width())), int(math.floor(size_.height()))
)
else:
size_part = ''
img_encoded = byte_array.toBase64().data().decode("utf-8")
return '<img src="data:image/png;base64,{}"{}/>'.format(img_encoded, size_part)
def get_html_img(scene):
"""
Create HTML img element with base64-encoded image from the scene
"""
byte_array = QByteArray()
filename = QBuffer(byte_array)
filename.open(QIODevice.WriteOnly)
PngFormat.write(filename, scene)
img_encoded = byte_array.toBase64().data().decode("utf-8")
return "<img src='data:image/png;base64,%s'/>" % img_encoded
def get_html_img(scene):
"""
Create HTML img element with base64-encoded image from the scene
"""
byte_array = QByteArray()
filename = QBuffer(byte_array)
filename.open(QIODevice.WriteOnly)
PngFormat.write(filename, scene)
img_encoded = byte_array.toBase64().data().decode("utf-8")
return "<img src='data:image/png;base64,%s'/>" % img_encoded
def get_html_img(scene: QGraphicsScene,
max_height: Optional[int] = None) -> str:
"""
Create HTML img element with base64-encoded image from the scene.
If max_height is not none set the max height of the image in html.
"""
byte_array = QByteArray()
filename = QBuffer(byte_array)
filename.open(QIODevice.WriteOnly)
PngFormat.write(filename, scene)
img_encoded = byte_array.toBase64().data().decode("utf-8")
return '<img {} src="data:image/png;base64,{}"/>'.format(
("" if max_height is None else
'style="max-height: {}px"'.format(max_height)), img_encoded)
def image_data(pm):
# type: (QPixmap) -> str
"""
Render the contents of the pixmap as a data URL (RFC-2397)
Parameters
----------
pm : QPixmap
Returns
-------
datauri : str
"""
pm = QPixmap(pm)
device = QBuffer()
assert device.open(QBuffer.ReadWrite)
pm.save(device, b"png")
device.close()
data = bytes(device.data())
payload = base64.b64encode(data).decode("ascii")
return "data:image/png;base64," + payload
def image_data(pm):
# type: (QPixmap) -> str
"""
Render the contents of the pixmap as a data URL (RFC-2397)
Parameters
----------
pm : QPixmap
Returns
-------
datauri : str
"""
pm = QPixmap(pm)
device = QBuffer()
assert device.open(QBuffer.ReadWrite)
pm.save(device, b'png')
device.close()
data = bytes(device.data())
payload = base64.b64encode(data).decode("ascii")
return "data:image/png;base64," + payload
