def draw_layout(
self,
layout_name: str,
reset_view: bool = True,
):
print(f"drawing {layout_name}")
self._current_layout = layout_name
self.view.begin_loading()
new_scene = qw.QGraphicsScene()
self._backend.set_scene(new_scene)
layout = self.doc.layout(layout_name)
self._update_render_context(layout)
try:
start = time.perf_counter()
self.create_frontend().draw_layout(layout)
duration = time.perf_counter() - start
print(f"took {duration:.4f} seconds")
except DXFStructureError as e:
qw.QMessageBox.critical(
self,
"DXF Structure Error",
f'Abort rendering of layout "{layout_name}": {str(e)}',
)
finally:
self._backend.finalize()
self.view.end_loading(new_scene)
self.view.buffer_scene_rect()
if reset_view:
self.view.fit_to_scene()
def __init__(self, config: Configuration = Configuration.defaults()):
super().__init__()
self._config = config
self.doc = None
self._render_context = None
self._visible_layers = None
self._current_layout = None
self._reset_backend()
self.view = CADGraphicsViewWithOverlay()
self.view.setScene(qw.QGraphicsScene())
self.view.scale(1, -1) # so that +y is up
self.view.element_selected.connect(self._on_element_selected)
self.view.mouse_moved.connect(self._on_mouse_moved)
menu = self.menuBar()
select_doc_action = QAction("Select Document", self)
select_doc_action.triggered.connect(self._select_doc)
menu.addAction(select_doc_action)
self.select_layout_menu = menu.addMenu("Select Layout")
toggle_sidebar_action = QAction("Toggle Sidebar", self)
toggle_sidebar_action.triggered.connect(self._toggle_sidebar)
menu.addAction(toggle_sidebar_action)
self.sidebar = qw.QSplitter(qc.Qt.Vertical)
self.layers = qw.QListWidget()
self.layers.setStyleSheet(
"QListWidget {font-size: 12pt;} "
"QCheckBox {font-size: 12pt; padding-left: 5px;}")
self.sidebar.addWidget(self.layers)
info_container = qw.QWidget()
info_layout = qw.QVBoxLayout()
info_layout.setContentsMargins(0, 0, 0, 0)
self.selected_info = qw.QPlainTextEdit()
self.selected_info.setReadOnly(True)
info_layout.addWidget(self.selected_info)
self.mouse_pos = qw.QLabel()
info_layout.addWidget(self.mouse_pos)
info_container.setLayout(info_layout)
self.sidebar.addWidget(info_container)
container = qw.QSplitter()
self.setCentralWidget(container)
container.addWidget(self.view)
container.addWidget(self.sidebar)
container.setCollapsible(0, False)
container.setCollapsible(1, True)
w = container.width()
container.setSizes([int(3 * w / 4), int(w / 4)])
self.setWindowTitle("CAD Viewer")
self.resize(1600, 900)
self.show()
def __init__(
self,
scene: Optional[qw.QGraphicsScene] = None,
*,
use_text_cache: bool = True,
debug_draw_rect: bool = False,
extra_lineweight_scaling: float = 2.0,
):
"""
Args:
extra_lineweight_scaling: compared to other backends,
PyQt draws lines which appear thinner
"""
super().__init__()
self._scene = scene or qw.QGraphicsScene() # avoids many type errors
self._color_cache: Dict[Color, qg.QColor] = {}
self._pattern_cache: Dict[PatternKey, int] = {}
self._no_line = qg.QPen(qc.Qt.NoPen)
self._no_fill = qg.QBrush(qc.Qt.NoBrush)
self._text_renderer = TextRenderer(qg.QFont(), use_text_cache)
self._line_renderer: PyQtLineRenderer
self._extra_lineweight_scaling = extra_lineweight_scaling
self._debug_draw_rect = debug_draw_rect
def backend():
global _app
_app = qw.QApplication([])
scene = qw.QGraphicsScene()
return PyQtBackend(scene)