def paintEvent(self, ev):
p = QPainter(self)
c = color('tab tree background', None)
if c:
p.fillRect(ev.rect(), QColor(c))
p.end()
QWidget.paintEvent(self, ev)
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
qp.setRenderHint(QPainter.RenderHints.Antialiasing)
self.drawBezierCurve(qp)
qp.end()
def paintEvent(self, ev):
painter = QPainter(self)
painter.setRenderHint(QPainter.RenderHint.TextAntialiasing)
f = painter.font()
f.setBold(True)
f.setPixelSize(self.height() - 1)
painter.setFont(f)
painter.setPen(QColor('red' if self.is_enabled else 'green'))
painter.drawText(self.rect(), Qt.AlignmentFlag.AlignCenter, 'Z')
painter.end()
def paintEvent(self, event):
contents_y = self.edit.verticalScrollBar().value()
page_bottom = contents_y + self.edit.viewport().height()
font_metrics = self.fontMetrics()
current_block = self.edit.document().findBlock(self.edit.textCursor().position())
painter = QPainter(self)
line_count = 0
# Iterate over all text blocks in the document.
#
block = self.edit.document().begin()
while block.isValid():
line_count += 1
# The top left position of the block in the document.
#
position = self.edit.document().documentLayout().blockBoundingRect(block).topLeft()
# Check if the position of the block is out side of the visible
# area.
#
if position.y() > page_bottom:
break
# We want the line number for the selected line to be bold.
#
bold = False
if block == current_block:
bold = True
font = painter.font()
font.setBold(True)
painter.setFont(font)
# Draw the line number right justified at the y position of the
# line. 3 is a magic padding number. drawText(x, y, text).
#
painter.drawText(self.width() - len(str(line_count)) * font_metrics.averageCharWidth() - 5,
round(position.y()) - contents_y + font_metrics.ascent(), str(line_count))
# Remove the bold style if it was set previously.
#
if bold:
font = painter.font()
font.setBold(False)
painter.setFont(font)
block = block.next()
self.highest_line = line_count
painter.end()
QWidget.paintEvent(self, event)
def paintEvent(self, ev):
painter = QPainter(self)
painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
painter.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform, True)
try:
self.paint_background(painter)
except Exception:
pass
finally:
painter.end()
QWidget.paintEvent(self, ev)
def rotated_by(self, pixmap, angle):
ans = pixmap.copy()
ans.fill(Qt.GlobalColor.transparent)
p = QPainter(ans)
p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform)
p.setRenderHint(QPainter.RenderHint.Antialiasing)
sz = ans.size().width() / ans.devicePixelRatio()
p.translate(sz // 2, sz // 2)
p.rotate(angle)
p.translate(-sz // 2, -sz // 2)
p.drawPixmap(0, 0, pixmap)
p.end()
return ans
def missing_icon():
global _missing_icon
if _missing_icon is None:
p = QPixmap(ICON_SIZE, ICON_SIZE)
p.fill(Qt.GlobalColor.transparent)
painter = QPainter(p)
pal = QApplication.instance().palette()
painter.setPen(
QPen(pal.color(QPalette.ColorRole.Text), 0, Qt.PenStyle.DashLine))
margin = 3
r = p.rect().adjusted(margin, margin, -margin, -margin)
painter.drawRect(r)
painter.end()
_missing_icon = QIcon(p)
return _missing_icon
def mouseMoveEvent(self, event):
if self.xCache == None:
self.xCache = event.position().x()
self.yCache = event.position().y()
else:
painter = QPainter(self.canvas)
pen = painter.pen()
pen.setWidth(self.strokeWidth)
pen.setColor(QColor(*self.color))
pen.setStyle(self.strokeStyle)
painter.setPen(pen)
painter.drawLine(self.xCache, self.yCache,
event.position().x(),
event.position().y())
painter.end()
self.setPixmap(self.canvas)
self.xCache = event.position().x()
self.yCache = event.position().y()
def paintEvent(self, ev):
if not self.static_text or not self.static_text.text():
return
p = QPainter(self)
p.setRenderHint(QPainter.RenderHint.TextAntialiasing)
# If text is too long too fit, fade it out at the end
self.static_text.setTextWidth(self.rect().width())
sz = self.static_text.size()
r = self.rect()
p.drawStaticText(0,
int(r.height() - sz.height()) // 2, self.static_text)
if sz.width() > r.width():
g = QLinearGradient(QPointF(self.rect().topLeft()),
QPointF(self.rect().topRight()))
c = QColor(self.sb_background)
c.setAlpha(0)
g.setColorAt(0, c)
g.setColorAt(0.8, c)
g.setColorAt(1.0, self.sb_background)
p.fillRect(self.rect(), QBrush(g))
p.end()
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
def paintEvent(self, a0: QtGui.QPaintEvent) -> None:
super().paintEvent(a0)
qp = QPainter()
qp.begin(self)
qp.setRenderHint(QPainter.RenderHint.Antialiasing)
# Hintergrund malen
pen = QPen(Qt.GlobalColor.gray, 1, Qt.PenStyle.SolidLine)
qp.setPen(pen)
qp.setBrush(Qt.GlobalColor.gray)
qp.drawRect(0, 0, self.width(), self.height())
# Sample malen
pen.setColor(Qt.GlobalColor.white)
qp.setPen(pen)
qp.setBrush(Qt.GlobalColor.white)
qp.drawRect(*self.norm_to_pixel_coord_int(-self.margin, -self.margin),
self.norm_to_pixel_rel_int(self.x_range + 2 * self.margin),
self.norm_to_pixel_rel_int(self.x_range + 2 * self.margin))
qp.end()
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
self.drawLines(qp)
qp.end()
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
self.drawRectangles(qp)
qp.end()
def paintEvent(self, event):
painter = QPainter()
painter.begin(self)
painter.setOpacity(self.pixmap_opacity)
painter.drawPixmap(0, 0, self.old_pixmap)
painter.end()
class MazeView(QWidget):
__painter: QPainter
__maze: MazeProtocol
__keepAspectRatio: bool
__solverState: Optional[MazeSolverState] = None
onMazeSolverAgentUpdate = pyqtSignal(MazeSolverState)
def __init__(
self,
minimumSize: QSize,
maze: MazeProtocol,
parent: Optional[QWidget] = None,
keepAspectRatio: bool = True,
*args: Tuple[Any, Any],
**kwargs: Tuple[Any, Any],
):
super().__init__(parent=parent, *args, **kwargs)
self.__keepAspectRatio = keepAspectRatio
self.__maze = maze
self.setContentsMargins(0, 0, 0, 0)
self.setMinimumSize(minimumSize)
# connect the onMazeSolverAgentUpdate signal with our internal method
self.onMazeSolverAgentUpdate.connect(self.__onMazeSolverAgentUpdate)
def __onMazeSolverAgentUpdate(self, newState: MazeSolverState) -> None:
self.__solverState = newState
self.update()
# self.__drawAgent(self.__solverState)
def resizeEvent(self, a0: QResizeEvent) -> None:
if self.__keepAspectRatio:
# Force the widget to rezise with a 1:1 aspect ratio
# first calculate the smallest size axis:
smallestAxisSize = min(a0.size().width(), a0.size().height())
# set a newSize var with this as both the axes sizes
newSize = QSize(smallestAxisSize, smallestAxisSize)
# resize with this new 1:1 size
self.resize(newSize)
# force resizeEvent of super with implicitly modified resize
return super().resizeEvent(a0)
def paintEvent(self, a0: QPaintEvent) -> None:
# Initialise a painter to paint on this widget
self.__painter = QPainter(self)
# only draw the agent if the solverState is bound
# if self.__solverState is not None:
# it is a bound variable so draw it
if self.__solverState is not None:
agent = self.__drawAgent(self.__solverState)
self.__painter.drawPath(agent)
mazePath = self.__createMazePath()
self.__painter.drawPath(mazePath)
self.__painter.end()
def __drawAgent(
self,
solverState: MazeSolverState,
) -> QPainterPath:
# solverAgentPainter = QPainter(self)
# Calculate size of each cell to be able to draw to proper scale
cellSize = (
self.width() / self.__maze.size.x,
self.height() / self.__maze.size.y,
)
solverAgent = QPainterPath()
# draw the agent shape
currentPosition = (
solverState.currentCell.x * cellSize[0],
solverState.currentCell.y * cellSize[1],
)
solverAgent.addEllipse(
currentPosition[0],
currentPosition[1],
cellSize[0],
cellSize[1],
)
###
### Draw the direction arrow of the solver
###
# get the facing direction of the solver
direction = solverState.facingDirection
# calculte middle of agent solver sprite to draw from
middleOfCircle = (
currentPosition[0] + cellSize[0] * 0.5,
currentPosition[1] + cellSize[1] * 0.5,
)
# calculate the XY of the edge of the circle that we want to move to (to the facing direction)
# start by getting the middle of the circle and then changing it accordingly
edgeOfCircle = [
middleOfCircle[0],
middleOfCircle[1],
]
if direction == AbsoluteDirection.north:
# north, so take away half the circle size in the Y direction
edgeOfCircle[1] -= cellSize[1] * 0.5
elif direction == AbsoluteDirection.south:
# south, so add half the circle size in the Y direction
edgeOfCircle[1] += cellSize[1] * 0.5
elif direction == AbsoluteDirection.west:
# west, so take away half the circle size in the X direction
edgeOfCircle[0] -= cellSize[0] * 0.5
elif direction == AbsoluteDirection.east:
# east, so add half the circle size in the X direction
edgeOfCircle[0] += cellSize[0] * 0.5
# move to the center of the circle
solverAgent.moveTo(
middleOfCircle[0],
middleOfCircle[1],
)
# draw a line from the center of the circle to the facing direction edge of the circle
solverAgent.lineTo(
edgeOfCircle[0],
edgeOfCircle[1],
)
return solverAgent
def __createMazePath(self) -> QPainterPath:
cellSize = (
self.width() / self.__maze.size.x,
self.height() / self.__maze.size.y,
)
path = QPainterPath(QPointF(0, 0))
# draw outline of maze
path.addRect(
0,
0,
self.width() - 1,
self.height() - 1,
)
for y in range(self.__maze.size.y):
currentY = y * cellSize[1]
for x in range(self.__maze.size.x):
currentX = x * cellSize[0]
# get the list of walls surrounding this cell
thisCellsWalls: Set[
AbsoluteDirection] = self.__maze.getWallsOfCellAtCoordinate(
XY(x, y))
# draw north and west walls only, because the next iterations will draw the south and east walls for us (don't wanna waste paint /s)
if AbsoluteDirection.west in thisCellsWalls:
path.moveTo(currentX, currentY)
path.lineTo(currentX, currentY + cellSize[1])
if AbsoluteDirection.north in thisCellsWalls:
path.moveTo(currentX, currentY)
path.lineTo(currentX + cellSize[0], currentY)
return path
def paintEvent(self, event):
qp = QPainter()
qp.begin(self)
self.drawText(event, qp)
qp.end()
def get_masked_image(path, size=64, overlay_text=""):
"""
Returns a pixmap from an image file masked with a smooth circle.
The returned pixmap will have a size of *size* × *size* pixels.
:param str path: Path to image file.
:param int size: Target size. Will be the diameter of the masked image.
:param str overlay_text: Overlay text. This will be shown in white sans-serif on top
of the image.
:return: Masked image with overlay text.
:rtype: QPixmap
"""
with open(path, "rb") as f:
imgdata = f.read()
imgtype = path.split(".")[-1]
# Load image and convert to 32-bit ARGB (adds an alpha channel):
image = QImage.fromData(imgdata, imgtype)
image.convertToFormat(QImage.Format.Format_ARGB32)
# Crop image to a square:
imgsize = min(image.width(), image.height())
width = (image.width() - imgsize) / 2
height = (image.height() - imgsize) / 2
rect = QRect(
round(width),
round(height),
imgsize,
imgsize,
)
image = image.copy(rect)
# Create the output image with the same dimensions and an alpha channel
# and make it completely transparent:
out_img = QImage(imgsize, imgsize, QImage.Format.Format_ARGB32)
out_img.fill(Qt.GlobalColor.transparent)
# Create a texture brush and paint a circle with the original image onto
# the output image:
brush = QBrush(image) # Create texture brush
painter = QPainter(out_img) # Paint the output image
painter.setBrush(brush) # Use the image texture brush
painter.setPen(Qt.PenStyle.NoPen) # Don't draw an outline
painter.setRenderHint(QPainter.RenderHint.Antialiasing, True) # Use AA
painter.drawEllipse(0, 0, imgsize, imgsize) # Actually draw the circle
if overlay_text:
# draw text
font = QtGui.QFont("Arial Rounded MT Bold")
font.setPointSize(imgsize * 0.4)
painter.setFont(font)
painter.setPen(Qt.GlobalColor.white)
painter.drawText(QRect(0, 0, imgsize, imgsize),
Qt.AlignmentFlag.AlignCenter, overlay_text)
painter.end() # We are done (segfault if you forget this)
# Convert the image to a pixmap and rescale it. Take pixel ratio into
# account to get a sharp image on retina displays:
pr = QtWidgets.QApplication.instance().devicePixelRatio()
pm = QPixmap.fromImage(out_img)
pm.setDevicePixelRatio(pr)
size = int(pr * size)
pm = pm.scaled(
size,
size,
Qt.AspectRatioMode.KeepAspectRatio,
Qt.TransformationMode.SmoothTransformation,
)
return pm
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
self.drawWidget(qp)
qp.end()