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import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui, QtWidgets
app = pg.mkQApp()
def test_basics_graphics_view():
view = pg.GraphicsView()
background_role = view.backgroundRole()
assert background_role == QtGui.QPalette.ColorRole.Window
assert view.backgroundBrush().color() == QtGui.QColor(0, 0, 0, 255)
assert view.focusPolicy() == QtCore.Qt.FocusPolicy.StrongFocus
assert view.transformationAnchor() == QtWidgets.QGraphicsView.ViewportAnchor.NoAnchor
minimal_update = QtWidgets.QGraphicsView.ViewportUpdateMode.MinimalViewportUpdate
assert view.viewportUpdateMode() == minimal_update
assert view.frameShape() == QtWidgets.QFrame.Shape.NoFrame
assert view.hasMouseTracking() is True
# Default properties
# --------------------------------------
assert view.mouseEnabled is False
assert view.aspectLocked is False
assert view.autoPixelRange is True
assert view.scaleCenter is False
assert view.clickAccepted is False
assert view.centralWidget is not None
assert view._background == "default"
# Set background color
# --------------------------------------
view.setBackground("w")
assert view._background == "w"
assert view.backgroundBrush().color() == QtCore.Qt.GlobalColor.white
# Set anti aliasing
# --------------------------------------
aliasing = QtGui.QPainter.RenderHint.Antialiasing
# Default is set to `False`
assert view.renderHints() & aliasing != aliasing
view.setAntialiasing(True)
assert view.renderHints() & aliasing == aliasing
view.setAntialiasing(False)
assert view.renderHints() & aliasing != aliasing
# Enable mouse
# --------------------------------------
view.enableMouse(True)
assert view.mouseEnabled is True
assert view.autoPixelRange is False
view.enableMouse(False)
assert view.mouseEnabled is False
assert view.autoPixelRange is True
# Add and remove item
# --------------------------------------
central_item = QtWidgets.QGraphicsWidget()
view.setCentralItem(central_item)
assert view.centralWidget is central_item
# XXX: Removal of central item is not clear in code
scene = view.sceneObj
assert isinstance(scene, pg.GraphicsScene)
assert central_item in scene.items()
item = QtWidgets.QGraphicsWidget()
assert item not in scene.items()
view.addItem(item)
assert item in scene.items()
view.removeItem(item)
assert item not in scene.items()
# Close the graphics view
# --------------------------------------
view.close()
assert view.centralWidget is None
assert view.currentItem is None
assert view.sceneObj is None
assert view.closed is True
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