def __init__(self, amount=10.0):
super(AutoPanController, self).__init__()
self._enabled = False
self._amount = amount
self._auto_pan_delta = QVector2D(0.0, 0.0)
self._been_outside = False
def update(self, rect, pos):
if self._enabled:
if pos.x() < 0:
self._auto_pan_delta = QVector2D(-self._amount, 0.0)
self._been_outside = True
self._amount = mathlib.clamp(abs(pos.x()) * 0.3, 0.0, 25.0)
if pos.x() > rect.width():
self._auto_pan_delta = QVector2D(self._amount, 0.0)
self._been_outside = True
self._amount = mathlib.clamp(
abs(rect.width() - pos.x()) * 0.3, 0.0, 25.0)
if pos.y() < 0:
self._auto_pan_delta = QVector2D(0.0, -self._amount)
self._been_outside = True
self._amount = mathlib.clamp(abs(pos.y()) * 0.3, 0.0, 25.0)
if pos.y() > rect.height():
self._auto_pan_delta = QVector2D(0.0, self._amount)
self._been_outside = True
self._amount = mathlib.clamp(
abs(rect.height() - pos.y()) * 0.3, 0.0, 25.0)
if self._been_outside and rect.contains(pos):
self.reset()
def mousePressEvent(self, event):
super(BaseGraphicsView, self).mousePressEvent(event)
self._pressed_item = self.itemAt(event.pos())
self._mouse_pressed_pos = event.pos()
modifiers = event.modifiers()
if self._pressed_item and isinstance(self._pressed_item,
QGraphicsItem):
self._auto_pan_controller.start()
if not self._pressed_item:
if event.button() == Qt.LeftButton:
self._is_rubber_rect_selection = True
if event.button() == Qt.RightButton and modifiers == Qt.NoModifier:
self._is_panning = True
self._init_scrollbars_pos = QVector2D(
self.horizontalScrollBar().value(),
self.verticalScrollBar().value())
def __init__(self, min_scale=0.5, max_scale=2.0, parent=None, **kwargs):
super(BaseGraphicsView, self).__init__(parent=parent)
self._min_scale = min_scale
self._max_scale = max_scale
self._factor = 1.0
self._factor_diff = 0.0
self._scale = 1.0
self._pan_speed = 1.0
self._is_panning = False
self._init_scrollbars_pos = QVector2D(
self.horizontalScrollBar().value(),
self.verticalScrollBar().value())
self._is_rubber_rect_selection = False
self._use_opengl = kwargs.get('use_opengl', False)
self.log = kwargs.get('log', LOGGER)
self._mouse_pressed = False
self._pressed_item = None
self._released_item = None
self._mouse_pressed_pos = QPoint(0, 0)
self._mouse_release_pos = QPoint(0, 0)
self._mouse_pos = QPoint(0, 0)
self._last_mouse_pos = QPoint(0, 0)
self._auto_pan_controller = AutoPanController()
self._rubber_rect = RubberRect(name='RubberRect')
self.initialize_scene_view()
self.setInteractive(True)
self.setMouseTracking(True)
self.setRenderHint(QPainter.Antialiasing, True)
self.setRenderHint(QPainter.TextAntialiasing, True)
self.setRenderHint(QPainter.HighQualityAntialiasing, True)
self.setRenderHint(QPainter.SmoothPixmapTransform, True)
self.setRenderHint(QPainter.NonCosmeticDefaultPen, True)
self.setAttribute(Qt.WA_AlwaysShowToolTips)
self.setRubberBandSelectionMode(Qt.IntersectsItemShape)
def dot(self, vec):
return QVector2D.dotProduct(self, vec)
def reset(self):
self._been_outside = False
self._auto_pan_delta = QVector2D(0.0, 0.0)