class ProjectItemIcon(QGraphicsRectItem):
"""Base class for project item icons drawn in Design View."""
ITEM_EXTENT = 64
def __init__(self, toolbox, icon_file, icon_color, background_color):
"""
Args:
toolbox (ToolboxUI): QMainWindow instance
icon_file (str): Path to icon resource
icon_color (QColor): Icon's color
background_color (QColor): Background color
"""
super().__init__()
self._toolbox = toolbox
self.icon_file = icon_file
self._moved_on_scene = False
self.previous_pos = QPointF()
self.current_pos = QPointF()
self.icon_group = {self}
self.renderer = QSvgRenderer()
self.svg_item = QGraphicsSvgItem(self)
self.colorizer = QGraphicsColorizeEffect()
self.setRect(
QRectF(-self.ITEM_EXTENT / 2, -self.ITEM_EXTENT / 2,
self.ITEM_EXTENT, self.ITEM_EXTENT))
self.text_font_size = 10 # point size
# Make item name graphics item.
self._name = ""
self.name_item = QGraphicsSimpleTextItem(self._name, self)
self.set_name_attributes() # Set font, size, position, etc.
# Make connector buttons
self.connectors = dict(
bottom=ConnectorButton(self, toolbox, position="bottom"),
left=ConnectorButton(self, toolbox, position="left"),
right=ConnectorButton(self, toolbox, position="right"),
)
# Make exclamation and rank icons
self.exclamation_icon = ExclamationIcon(self)
self.execution_icon = ExecutionIcon(self)
self.rank_icon = RankIcon(self)
brush = QBrush(background_color)
self._setup(brush, icon_file, icon_color)
shadow_effect = QGraphicsDropShadowEffect()
shadow_effect.setOffset(1)
shadow_effect.setEnabled(False)
self.setGraphicsEffect(shadow_effect)
def finalize(self, name, x, y):
"""
Names the icon and moves it by given amount.
Args:
name (str): icon's name
x (int): horizontal offset
y (int): vertical offset
"""
self.update_name_item(name)
self.moveBy(x, y)
def _setup(self, brush, svg, svg_color):
"""Setup item's attributes.
Args:
brush (QBrush): Used in filling the background rectangle
svg (str): Path to SVG icon file
svg_color (QColor): Color of SVG icon
"""
self.setPen(QPen(Qt.black, 1, Qt.SolidLine))
self.setBrush(brush)
self.colorizer.setColor(svg_color)
# Load SVG
loading_ok = self.renderer.load(svg)
if not loading_ok:
self._toolbox.msg_error.emit(
"Loading SVG icon from resource:{0} failed".format(svg))
return
size = self.renderer.defaultSize()
self.svg_item.setSharedRenderer(self.renderer)
self.svg_item.setElementId(
"") # guess empty string loads the whole file
dim_max = max(size.width(), size.height())
rect_w = self.rect().width() # Parent rect width
margin = 32
self.svg_item.setScale((rect_w - margin) / dim_max)
self.svg_item.setPos(self.rect().center() -
self.svg_item.sceneBoundingRect().center())
self.svg_item.setGraphicsEffect(self.colorizer)
self.setFlag(QGraphicsItem.ItemIsMovable, enabled=True)
self.setFlag(QGraphicsItem.ItemIsSelectable, enabled=True)
self.setFlag(QGraphicsItem.ItemIsFocusable, enabled=True)
self.setFlag(QGraphicsItem.ItemSendsScenePositionChanges, enabled=True)
self.setAcceptHoverEvents(True)
self.setCursor(Qt.PointingHandCursor)
# Set exclamation, execution_log, and rank icons position
self.exclamation_icon.setPos(
self.rect().topRight() -
self.exclamation_icon.sceneBoundingRect().topRight())
self.execution_icon.setPos(
self.rect().bottomRight() -
0.5 * self.execution_icon.sceneBoundingRect().bottomRight())
self.rank_icon.setPos(self.rect().topLeft())
def name(self):
"""Returns name of the item that is represented by this icon.
Returns:
str: icon's name
"""
return self._name
def update_name_item(self, new_name):
"""Set a new text to name item.
Args:
new_name (str): icon's name
"""
self._name = new_name
self.name_item.setText(new_name)
self.set_name_attributes()
def set_name_attributes(self):
"""Set name QGraphicsSimpleTextItem attributes (font, size, position, etc.)"""
# Set font size and style
font = self.name_item.font()
font.setPointSize(self.text_font_size)
font.setBold(True)
self.name_item.setFont(font)
# Set name item position (centered on top of the master icon)
name_width = self.name_item.boundingRect().width()
name_height = self.name_item.boundingRect().height()
self.name_item.setPos(
self.rect().x() + self.rect().width() / 2 - name_width / 2,
self.rect().y() - name_height - 4)
def conn_button(self, position="left"):
"""Returns item's connector button.
Args:
position (str): "left", "right" or "bottom"
Returns:
QWidget: connector button
"""
return self.connectors.get(position, self.connectors["left"])
def outgoing_links(self):
"""Collects outgoing links.
Returns:
list of LinkBase: outgoing links
"""
return [
l for conn in self.connectors.values()
for l in conn.outgoing_links()
]
def incoming_links(self):
"""Collects incoming links.
Returns:
list of LinkBase: outgoing links
"""
return [
l for conn in self.connectors.values()
for l in conn.incoming_links()
]
def run_execution_leave_animation(self, skipped):
"""
Starts the animation associated with execution leaving the icon.
Args:
skipped (bool): True if project item was not actually executed.
"""
animation_group = QParallelAnimationGroup(self._toolbox)
for link in self.outgoing_links():
animation_group.addAnimation(
link.make_execution_animation(skipped))
animation_group.start()
def hoverEnterEvent(self, event):
"""Sets a drop shadow effect to icon when mouse enters its boundaries.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
self.prepareGeometryChange()
self.graphicsEffect().setEnabled(True)
event.accept()
def hoverLeaveEvent(self, event):
"""Disables the drop shadow when mouse leaves icon boundaries.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
self.prepareGeometryChange()
self.graphicsEffect().setEnabled(False)
event.accept()
def mousePressEvent(self, event):
super().mousePressEvent(event)
self.icon_group = set(x for x in self.scene().selectedItems()
if isinstance(x, ProjectItemIcon)) | {self}
for icon in self.icon_group:
icon.previous_pos = icon.scenePos()
def mouseMoveEvent(self, event):
"""Moves icon(s) while the mouse button is pressed.
Update links that are connected to selected icons.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
super().mouseMoveEvent(event)
self.update_links_geometry()
def moveBy(self, dx, dy):
super().moveBy(dx, dy)
self.update_links_geometry()
def update_links_geometry(self):
"""Updates geometry of connected links to reflect this item's most recent position."""
links = set(link for icon in self.icon_group
for conn in icon.connectors.values()
for link in conn.links)
for link in links:
link.update_geometry()
def mouseReleaseEvent(self, event):
for icon in self.icon_group:
icon.current_pos = icon.scenePos()
# pylint: disable=undefined-variable
if (self.current_pos - self.previous_pos
).manhattanLength() > qApp.startDragDistance():
self._toolbox.undo_stack.push(
MoveIconCommand(self, self._toolbox.project()))
super().mouseReleaseEvent(event)
def notify_item_move(self):
if self._moved_on_scene:
self._moved_on_scene = False
scene = self.scene()
scene.item_move_finished.emit(self)
def contextMenuEvent(self, event):
"""Show item context menu.
Args:
event (QGraphicsSceneMouseEvent): Mouse event
"""
event.accept()
self.scene().clearSelection()
self.setSelected(True)
ind = self._toolbox.project_item_model.find_item(self.name())
self._toolbox.show_project_item_context_menu(event.screenPos(), ind)
def itemChange(self, change, value):
"""
Reacts to item removal and position changes.
In particular, destroys the drop shadow effect when the items is removed from a scene
and keeps track of item's movements on the scene.
Args:
change (GraphicsItemChange): a flag signalling the type of the change
value: a value related to the change
Returns:
Whatever super() does with the value parameter
"""
if change == QGraphicsItem.ItemScenePositionHasChanged:
self._moved_on_scene = True
elif change == QGraphicsItem.GraphicsItemChange.ItemSceneChange and value is None:
self.prepareGeometryChange()
self.setGraphicsEffect(None)
return super().itemChange(change, value)
def select_item(self):
"""Update GUI to show the details of the selected item."""
ind = self._toolbox.project_item_model.find_item(self.name())
self._toolbox.ui.treeView_project.setCurrentIndex(ind)
class ProjectItemIcon(QGraphicsRectItem):
ITEM_EXTENT = 64
def __init__(self, toolbox, x, y, project_item, icon_file, icon_color,
background_color):
"""Base class for project item icons drawn in Design View.
Args:
toolbox (ToolBoxUI): QMainWindow instance
x (float): Icon x coordinate
y (float): Icon y coordinate
project_item (ProjectItem): Item
icon_file (str): Path to icon resource
icon_color (QColor): Icon's color
background_color (QColor): Background color
"""
super().__init__()
self._toolbox = toolbox
self._project_item = project_item
self._moved_on_scene = False
self._previous_pos = QPointF()
self._current_pos = QPointF()
self.icon_group = {self}
self.renderer = QSvgRenderer()
self.svg_item = QGraphicsSvgItem(self)
self.colorizer = QGraphicsColorizeEffect()
self.setRect(
QRectF(x - self.ITEM_EXTENT / 2, y - self.ITEM_EXTENT / 2,
self.ITEM_EXTENT, self.ITEM_EXTENT))
self.text_font_size = 10 # point size
# Make item name graphics item.
name = project_item.name if project_item else ""
self.name_item = QGraphicsSimpleTextItem(name, self)
self.set_name_attributes() # Set font, size, position, etc.
# Make connector buttons
self.connectors = dict(
bottom=ConnectorButton(self, toolbox, position="bottom"),
left=ConnectorButton(self, toolbox, position="left"),
right=ConnectorButton(self, toolbox, position="right"),
)
# Make exclamation and rank icons
self.exclamation_icon = ExclamationIcon(self)
self.rank_icon = RankIcon(self)
brush = QBrush(background_color)
self._setup(brush, icon_file, icon_color)
self.activate()
def activate(self):
"""Adds items to scene and setup graphics effect.
Called in the constructor and when re-adding the item to the project in the context of undo/redo.
"""
scene = self._toolbox.ui.graphicsView.scene()
scene.addItem(self)
shadow_effect = QGraphicsDropShadowEffect()
shadow_effect.setOffset(1)
shadow_effect.setEnabled(False)
self.setGraphicsEffect(shadow_effect)
def _setup(self, brush, svg, svg_color):
"""Setup item's attributes.
Args:
brush (QBrush): Used in filling the background rectangle
svg (str): Path to SVG icon file
svg_color (QColor): Color of SVG icon
"""
self.setPen(QPen(Qt.black, 1, Qt.SolidLine))
self.setBrush(brush)
self.colorizer.setColor(svg_color)
# Load SVG
loading_ok = self.renderer.load(svg)
if not loading_ok:
self._toolbox.msg_error.emit(
"Loading SVG icon from resource:{0} failed".format(svg))
return
size = self.renderer.defaultSize()
self.svg_item.setSharedRenderer(self.renderer)
self.svg_item.setElementId(
"") # guess empty string loads the whole file
dim_max = max(size.width(), size.height())
rect_w = self.rect().width() # Parent rect width
margin = 32
self.svg_item.setScale((rect_w - margin) / dim_max)
x_offset = (rect_w - self.svg_item.sceneBoundingRect().width()) / 2
y_offset = (rect_w - self.svg_item.sceneBoundingRect().height()) / 2
self.svg_item.setPos(self.rect().x() + x_offset,
self.rect().y() + y_offset)
self.svg_item.setGraphicsEffect(self.colorizer)
self.setFlag(QGraphicsItem.ItemIsMovable, enabled=True)
self.setFlag(QGraphicsItem.ItemIsSelectable, enabled=True)
self.setFlag(QGraphicsItem.ItemIsFocusable, enabled=True)
self.setFlag(QGraphicsItem.ItemSendsScenePositionChanges, enabled=True)
self.setAcceptHoverEvents(True)
self.setCursor(Qt.PointingHandCursor)
# Set exclamation and rank icons position
self.exclamation_icon.setPos(
self.rect().topRight() -
self.exclamation_icon.sceneBoundingRect().topRight())
self.rank_icon.setPos(self.rect().topLeft())
def name(self):
"""Returns name of the item that is represented by this icon."""
return self._project_item.name
def update_name_item(self, new_name):
"""Set a new text to name item. Used when a project item is renamed."""
self.name_item.setText(new_name)
self.set_name_attributes()
def set_name_attributes(self):
"""Set name QGraphicsSimpleTextItem attributes (font, size, position, etc.)"""
# Set font size and style
font = self.name_item.font()
font.setPointSize(self.text_font_size)
font.setBold(True)
self.name_item.setFont(font)
# Set name item position (centered on top of the master icon)
name_width = self.name_item.boundingRect().width()
name_height = self.name_item.boundingRect().height()
self.name_item.setPos(
self.rect().x() + self.rect().width() / 2 - name_width / 2,
self.rect().y() - name_height - 4)
def conn_button(self, position="left"):
"""Returns items connector button (QWidget)."""
return self.connectors.get(position, self.connectors["left"])
def outgoing_links(self):
return [
l for conn in self.connectors.values()
for l in conn.outgoing_links()
]
def incoming_links(self):
return [
l for conn in self.connectors.values()
for l in conn.incoming_links()
]
def hoverEnterEvent(self, event):
"""Sets a drop shadow effect to icon when mouse enters its boundaries.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
self.prepareGeometryChange()
self.graphicsEffect().setEnabled(True)
event.accept()
def hoverLeaveEvent(self, event):
"""Disables the drop shadow when mouse leaves icon boundaries.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
self.prepareGeometryChange()
self.graphicsEffect().setEnabled(False)
event.accept()
def mousePressEvent(self, event):
super().mousePressEvent(event)
self.icon_group = set(x for x in self.scene().selectedItems()
if isinstance(x, ProjectItemIcon)) | {self}
for icon in self.icon_group:
icon._previous_pos = icon.scenePos()
def mouseMoveEvent(self, event):
"""Moves icon(s) while the mouse button is pressed.
Update links that are connected to selected icons.
Args:
event (QGraphicsSceneMouseEvent): Event
"""
super().mouseMoveEvent(event)
self.update_links_geometry()
def moveBy(self, dx, dy):
super().moveBy(dx, dy)
self.update_links_geometry()
def update_links_geometry(self):
"""Updates geometry of connected links to reflect this item's most recent position."""
links = set(link for icon in self.icon_group
for conn in icon.connectors.values()
for link in conn.links)
for link in links:
link.update_geometry()
def mouseReleaseEvent(self, event):
for icon in self.icon_group:
icon._current_pos = icon.scenePos()
# pylint: disable=undefined-variable
if (self._current_pos - self._previous_pos
).manhattanLength() > qApp.startDragDistance():
self._toolbox.undo_stack.push(MoveIconCommand(self))
super().mouseReleaseEvent(event)
def notify_item_move(self):
if self._moved_on_scene:
self._moved_on_scene = False
scene = self.scene()
scene.item_move_finished.emit(self)
def contextMenuEvent(self, event):
"""Show item context menu.
Args:
event (QGraphicsSceneMouseEvent): Mouse event
"""
self.scene().clearSelection()
self.setSelected(True)
self._toolbox.show_item_image_context_menu(event.screenPos(),
self.name())
def keyPressEvent(self, event):
"""Handles deleting and rotating the selected
item when dedicated keys are pressed.
Args:
event (QKeyEvent): Key event
"""
if event.key() == Qt.Key_Delete and self.isSelected():
self._project_item._project.remove_item(self.name())
event.accept()
elif event.key() == Qt.Key_R and self.isSelected():
# TODO:
# 1. Change name item text direction when rotating
# 2. Save rotation into project file
rect = self.mapToScene(self.boundingRect()).boundingRect()
center = rect.center()
t = QTransform()
t.translate(center.x(), center.y())
t.rotate(90)
t.translate(-center.x(), -center.y())
self.setPos(t.map(self.pos()))
self.setRotation(self.rotation() + 90)
links = set(lnk for conn in self.connectors.values()
for lnk in conn.links)
for link in links:
link.update_geometry()
event.accept()
else:
super().keyPressEvent(event)
def itemChange(self, change, value):
"""
Reacts to item removal and position changes.
In particular, destroys the drop shadow effect when the items is removed from a scene
and keeps track of item's movements on the scene.
Args:
change (GraphicsItemChange): a flag signalling the type of the change
value: a value related to the change
Returns:
Whatever super() does with the value parameter
"""
if change == QGraphicsItem.ItemScenePositionHasChanged:
self._moved_on_scene = True
elif change == QGraphicsItem.GraphicsItemChange.ItemSceneChange and value is None:
self.prepareGeometryChange()
self.setGraphicsEffect(None)
return super().itemChange(change, value)
def show_item_info(self):
"""Update GUI to show the details of the selected item."""
ind = self._toolbox.project_item_model.find_item(self.name())
self._toolbox.ui.treeView_project.setCurrentIndex(ind)
