class ResizableRubberBand(QWidget):
""" provides a rectangle which is defined by click and drag with the mouse and can be resized
afterwards
"""
def __init__(self, parent=None):
super(ResizableRubberBand, self).__init__(parent)
self.setWindowFlag(Qt.SubWindow)
self.setFocusPolicy(Qt.ClickFocus)
self.layout = QHBoxLayout(self)
self.layout.setContentsMargins(0, 0, 0, 0)
self.setCursor(Qt.SizeAllCursor)
self.origin = QPoint()
self.grip1 = QSizeGrip(self)
self.grip2 = QSizeGrip(self)
self.layout.addWidget(self.grip1, 0, Qt.AlignLeft | Qt.AlignTop)
self.layout.addWidget(self.grip2, 0, Qt.AlignRight | Qt.AlignBottom)
self.rubberband = QRubberBand(QRubberBand.Rectangle, self)
self.rubberband.move(0, 0)
self.hide()
self.rubberband.hide()
# self.rubberband.show()
# self.show()
def resizeEvent(self, event):
self.rubberband.resize(self.size())
def paintEvent(self, event):
super().paintEvent(event)
painter = QPainter(self)
painter.beginNativePainting()
painter.setRenderHint(QPainter.Antialiasing)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.setPen(QPen(Qt.red, 3))
painter.drawRect(self.rubberband.rect())
painter.setPen(QPen(Qt.red, 1))
x_begin = self.rubberband.x()
x_half = self.rubberband.x() + self.rubberband.width() / 2
x_full = self.rubberband.x() + self.rubberband.width()
y_begin = self.rubberband.y()
y_half = self.rubberband.y() + self.rubberband.height() / 2
y_full = self.rubberband.y() + self.rubberband.height()
points = [
QPoint(x_half, y_begin),
QPoint(x_half, y_full),
QPoint(x_begin, y_half),
QPoint(x_full, y_half)
]
painter.drawLines(points)
painter.endNativePainting()
painter.end()
# def moveEvent(self, event: QMoveEvent):
# self.rubberband.move(event.pos())
def mousePressEvent(self, event):
if event.buttons() == Qt.LeftButton:
self.origin = event.globalPos() - self.pos()
def mouseMoveEvent(self, event):
if event.buttons() == Qt.LeftButton:
self.move(event.globalPos() - self.origin)
class DynamicNeedleMask(QWidget):
"""
provides a rectangle with fixed centerline and x-symmetric resizability
"""
_gripSize = 8
update_mask_signal = Signal()
def __init__(self, parent=None):
super(DynamicNeedleMask, self).__init__(parent)
self.settings = QSettings()
self._first_show = True
self.setWindowFlag(Qt.SubWindow)
self.setFocusPolicy(Qt.ClickFocus)
self.layout = QHBoxLayout(self)
self.layout.setContentsMargins(0, 0, 0, 0)
self.setCursor(Qt.SizeAllCursor)
self.setGeometry(self.parent().width() / 2 - 10, 0, 20,
self.parent().height())
self._old_geo = self.geometry()
self._locked = False
self.origin = QPoint(0, 0)
self.rubberband = QRubberBand(QRubberBand.Rectangle, self)
self.rubberband.move(0, 0)
self.hide()
self.rubberband.hide()
# self.rubberband.show()
# self.show()
self.sideGrips = [
SideGrip(self, Qt.LeftEdge),
SideGrip(self, Qt.TopEdge),
SideGrip(self, Qt.RightEdge),
SideGrip(self, Qt.BottomEdge),
]
# corner grips should be "on top" of everything, otherwise the side grips
# will take precedence on mouse events, so we are adding them *after*;
# alternatively, widget.raise_() can be used
self.cornerGrips = [QSizeGrip(self) for i in range(4)]
def get_mask_geometry(self) -> Tuple[int, int, int, int]:
"""Return the geometry of the mask
:returns: the geometry of the mask as x,y,w,h tuple
"""
return self.geometry().normalized().getRect()
def lock(self):
"""lock resizing
"""
self._locked = True
def unlock(self):
"""unlock resizing
"""
self._locked = False
def showEvent(self, event):
"""
custom show event
initializes geometry for first show
"""
if self._first_show:
geo = self.load_geo()
if geo:
self.setGeometry(*geo)
else:
self.setGeometry(self.parent().width() * 15 / 32, 0,
self.parent().width() / 16,
self.parent().height())
self._first_show = False
@property
def gripSize(self):
return self._gripSize
def setGripSize(self, size):
if size == self._gripSize:
return
self._gripSize = max(2, size)
self.updateGrips()
def paintEvent(self, event):
super().paintEvent(event)
painter = QPainter(self)
painter.beginNativePainting()
painter.setRenderHint(QPainter.Antialiasing)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.setPen(QPen(Qt.green, 1, Qt.DotLine))
painter.drawRect(self.rubberband.rect())
painter.setPen(QPen(Qt.green, 1))
x_begin = self.rubberband.x()
x_half = self.rubberband.x() + self.rubberband.width() / 2
x_full = self.rubberband.x() + self.rubberband.width()
y_begin = self.rubberband.y()
y_half = self.rubberband.y() + self.rubberband.height() / 2
y_full = self.rubberband.y() + self.rubberband.height()
points = [QPoint(x_half, y_begin), QPoint(x_half, y_full)]
painter.drawLines(points)
painter.endNativePainting()
painter.end()
def resizeEvent(self, event: QResizeEvent):
x, y, w, h = self.geometry().normalized().getRect()
if (self._locked):
self.setGeometry(*self._old_geo.getRect())
else:
# limit size to parent boundaries
if (x < 0):
# remove width that has been added by leftward dragging if x is at leftmost edge
w += x
x = max(0, min(x, self.parent().width()))
w = min(w, self.parent().width() - x)
self.setGeometry(x, y, w, self.parent().height())
self.updateGrips()
self.rubberband.resize(self.size())
self._old_geo = self.geometry()
self.update_mask_signal.emit()
def mousePressEvent(self, event):
if event.buttons() == Qt.LeftButton:
self.origin = event.globalPos() - self.pos()
def mouseMoveEvent(self, event):
if event.buttons() == Qt.LeftButton:
x, y, w, h = self.geometry().normalized().getRect()
new_x = event.globalPos().x() - self.origin.x()
# keep inside parent boundaries
new_x = max(0, min(new_x, self.parent().width() - w))
self.move(new_x, 0)
self.update_mask_signal.emit()
def mouseReleaseEvent(self, event):
self.update_mask_signal.emit()
self.save_geo()
return super().mouseReleaseEvent(event)
def save_geo(self):
self.settings.setValue("needle_mask/geometry",
self.geometry().getRect())
def load_geo(self):
return self.settings.value("needle_mask/geometry")
def updateGrips(self):
self.setContentsMargins(*[self.gripSize] * 4)
outRect = self.rect()
# an "inner" rect used for reference to set the geometries of size grips
inRect = outRect.adjusted(self.gripSize, self.gripSize, -self.gripSize,
-self.gripSize)
# top left
self.cornerGrips[0].setGeometry(
QRect(outRect.topLeft(), inRect.topLeft()))
# top right
self.cornerGrips[1].setGeometry(
QRect(outRect.topRight(), inRect.topRight()).normalized())
# bottom right
self.cornerGrips[2].setGeometry(
QRect(inRect.bottomRight(), outRect.bottomRight()))
# bottom left
self.cornerGrips[3].setGeometry(
QRect(outRect.bottomLeft(), inRect.bottomLeft()).normalized())
# left edge
self.sideGrips[0].setGeometry(0, inRect.top(), self.gripSize,
inRect.height())
# top edge
self.sideGrips[1].setGeometry(inRect.left(), 0, inRect.width(),
self.gripSize)
# right edge
self.sideGrips[2].setGeometry(inRect.left() + inRect.width(),
inRect.top(), self.gripSize,
inRect.height())
# bottom edge
self.sideGrips[3].setGeometry(self.gripSize,
inRect.top() + inRect.height(),
inRect.width(), self.gripSize)