def create_qr_scene(self, scene, qr_pixel_map, qr_text, backgound_pixmap) :
pixmap_item = QGraphicsPixmapItem(qr_pixel_map)
pixmap_item.setY(100)
pixmap_item.setX(100)
background_item = QGraphicsPixmapItem(backgound_pixmap)
url_item = QGraphicsTextItem(qr_text)
url_item.setFont(QFont('Arial', 50))
url_item.setTextWidth(820)
url_item.setY(450)
url_item.setX(1150)
url_item.setZValue(1)
pixmap_item.setZValue(1)
background_item.setZValue(-1)
scene.addItem(pixmap_item)
scene.addItem(url_item)
scene.addItem(background_item)
return scene
class ScaleLine:
def __init__(self,
parent,
color,
text_color,
text_start="",
margins=(0, 0, 0, 0),
dp=1,
is_upload=False):
self._parent = parent
self._color = color
self._text_color = text_color
self._text_start = text_start
self._left, self._top, self._right, self._bottom = margins
self._dp = dp
self._is_upload = is_upload
self._line = QGraphicsLineItem(self._parent)
self._line.setZValue(12)
pen = QPen(self._color)
pen.setWidth(1)
pen.setStyle(Qt.DashLine)
self._line.setPen(pen)
if not self._is_upload:
self._text_item = QGraphicsTextItem(self._parent)
self._text_item.setZValue(11)
self._text_item.setDefaultTextColor(self._text_color)
font = self._text_item.font()
font_size = 10 * self._dp
if font_size > 0:
self._text_item.setFont(QFont(font.family(), font_size))
def set_line(self, max_value=0, resize=False):
height = self._parent.size().height() + self._top + self._bottom
shift = int(height - height / 1.1)
y = -self._top + shift
if not self._is_upload:
value = 0
max_value = int(max_value / 1.1)
megabyte = 1024 * 1024
if max_value > megabyte:
value = "{} MB".format(round(max_value / megabyte, 1))
elif max_value > 1024:
max_value //= 1024
if max_value >= 10:
max_value = max_value // 10 * 10
value = "{} KB".format(max_value)
elif max_value > 0:
if max_value >= 10:
max_value = max_value // 10 * 10
value = "{} B".format(max_value)
scale_text = self._text_start if not value \
else "{}{}/s".format(self._text_start, value)
font_height = QFontMetrics(self._text_item.font())\
.boundingRect(scale_text).height()
x = 10
self._text_item.setPos(x, y - font_height - 10)
self._text_item.setPlainText(scale_text)
if not resize:
return
self._line.setLine(QLineF(0, y, self._parent.size().width() + 30, y))
def eventFilter(self, obj, event):
if event.type() == QEvent.GraphicsSceneMousePress:
if event.button() == Qt.MouseButton.LeftButton:
self.mouse_pressed = True
self.mouse_pressed_x, self.mouse_pressed_y = event.pos().x(
), event.pos().y()
if self.draw_ellipse:
ellipsis = QGraphicsEllipseItem(self.chart)
ellipsis.setZValue(12)
ellipsis.setBrush(QBrush(QColor(244, 67, 54, 50)))
ellipsis.setPen(QPen(Qt.transparent))
self.ellipses.append(ellipsis)
elif self.write_text:
for t in self.texts:
r = QRectF()
r.setTopLeft(t.pos())
r.setWidth(t.boundingRect().width())
r.setHeight(t.boundingRect().height())
if r.contains(self.mouse_pressed_x,
self.mouse_pressed_y):
return True
"""
The user clicked over an area where there is no text. So we create one.
"""
text = QGraphicsTextItem(self.chart)
text.setZValue(12)
text.setPos(
QPointF(self.mouse_pressed_x, self.mouse_pressed_y))
text.setPlainText("label")
text.setAcceptHoverEvents(True)
text.setTabChangesFocus(True)
text.setFlags(QGraphicsTextItem.ItemIsMovable)
text.installEventFilter(self.text_event_filter)
self.texts.append(text)
return True
elif event.button() == Qt.MouseButton.RightButton:
x, y = event.pos().x(), event.pos().y()
for e in self.ellipses:
if e.rect().contains(x, y):
e.hide()
self.ellipses.remove(e)
for t in self.texts:
r = QRectF()
r.setTopLeft(t.pos())
r.setWidth(t.boundingRect().width())
r.setHeight(t.boundingRect().height())
if r.contains(x, y):
t.hide()
self.texts.remove(t)
return True
return QObject.eventFilter(self, obj, event)
elif event.type() == QEvent.GraphicsSceneMouseRelease:
self.mouse_pressed = False
return True
elif event.type() == QEvent.GraphicsSceneMouseMove:
if self.mouse_pressed:
if self.draw_ellipse:
x, y = event.pos().x(), event.pos().y()
width = x - self.mouse_pressed_x
height = y - self.mouse_pressed_y
self.ellipses[-1].setRect(self.mouse_pressed_x,
self.mouse_pressed_y, width,
height)
return True
return QObject.eventFilter(self, obj, event)
return QObject.eventFilter(self, obj, event)