def __updateView(self, view: QGraphicsView, rect: QRectF) -> None:
view.setSceneRect(rect)
viewrect = view.mapFromScene(rect).boundingRect()
view.setFixedHeight(int(math.ceil(viewrect.height())))
container = view.parent()
if rect.isEmpty():
container.setVisible(False)
return
# map the rect to (main) viewport coordinates
viewrect = self.mapFromScene(rect).boundingRect()
viewportrect = self.viewport().rect()
visible = not (viewrect.top() >= viewportrect.top()
and viewrect.bottom() <= viewportrect.bottom())
container.setVisible(visible)
# force immediate layout of the container overlay
QCoreApplication.sendEvent(container, QEvent(QEvent.LayoutRequest))
class base_scene_reactor(reactor, qt_drawings):
"""
Base class for reactor using Qt graphics scene and graphics items.
"""
def __init__(self):
self.scene = QGraphicsScene()
self.view = QGraphicsView(self.scene)
self.view.setInteractive(False)
self.view.setResizeAnchor(QGraphicsView.AnchorViewCenter)
self.view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.view.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform)
def widget(self):
return self.view
def reallocate_scene(self):
self.scene = QGraphicsScene()
self.view.setScene(self.scene)
self.view.resetTransform()
self.view.resetCachedContent()
self.view.setSceneRect(QRectF())
self.view.fitInView(self.scene.sceneRect().marginsAdded(QMarginsF(10, 10, 10, 10)), Qt.KeepAspectRatio)
def reset(self):
self.reallocate_scene()
def create_scene_tile(self, x: int, y: int, tile) -> QGraphicsItem:
x, y = self.pos_to_scene(x, y)
width = 2 * qt_drawings.tile_size if tile.is_horizontal else qt_drawings.tile_size
height = qt_drawings.tile_size if tile.is_horizontal else 2 * qt_drawings.tile_size
item = QGraphicsRectItem(0, 0, width, height)
item.setPos(x, y)
item.setBrush(qt_drawings.tile_to_brush(tile))
item.setPen(qt_drawings.black_pen)
self.scene.addItem(item)
return item
@staticmethod
def create_cross():
item = QGraphicsPolygonItem(qt_drawings.cross_polygon)
item.setBrush(qt_drawings.red_brush)
item.setPen(qt_drawings.red_pen)
return item
tile_rotation_angles = [[-90., 90.], [0., 180.]]
@staticmethod
def create_arrow(tile):
item = QGraphicsPolygonItem(qt_drawings.arrow_polygon)
item.setPen(qt_drawings.no_pen)
if tile:
item.setBrush(qt_drawings.cyan_brush if tile.is_frozen else qt_drawings.black_brush)
item.setTransformOriginPoint(qt_drawings.tile_size / 2, qt_drawings.tile_size / 2)
angle = base_scene_reactor.tile_rotation_angles[tile.is_horizontal][tile.is_positive]
item.setRotation(angle)
else:
item.setBrush(qt_drawings.black_brush)
return item
def adjust_view_to_fit(self):
viewOrigin = self.view.rect().topLeft()
sceneOrigin = self.view.mapFromScene(self.scene.sceneRect().translated(-15, -15).topLeft())
if viewOrigin.x() >= sceneOrigin.x() or viewOrigin.y() >= sceneOrigin.y():
#self.view.fitInView(QRectF(0, 0, 50, 50).united(self.scene.sceneRect().marginsAdded(QMarginsF(100, 100, 100, 100))), Qt.KeepAspectRatio)
self.view.fitInView(self.scene.sceneRect().marginsAdded(QMarginsF(50, 50, 50, 50)), Qt.KeepAspectRatio)
def pos_to_scene(self, x: int, y: int) -> tuple:
return (x * qt_drawings.tile_size, y * qt_drawings.tile_size)
def middle_pos_to_scene(self, x: int, y: int, tile) -> tuple:
if tile:
if tile.is_horizontal:
x += 0.5
else:
y += 0.5
return (x * qt_drawings.tile_size, y * qt_drawings.tile_size)
