def __getPreviewWidget(self):
# return the preview image view widget
if self.__previewWidget is None:
self.__previewWidget = Preview(self)
self.__previewWidget.setWindowFlags(Qt.WindowStaysOnTopHint
| Qt.Tool)
self.__previewWidget.setAttribute(Qt.WA_ShowWithoutActivating)
self.__previewWidget.setFocusPolicy(Qt.NoFocus)
self.__previewWidget.installEventFilter(self)
return self.__previewWidget
def __getPreviewWidget(self):
# return the preview image view widget
if self.__previewWidget is None:
self.__previewWidget = Preview(self)
self.__previewWidget.setWindowFlags(
Qt.WindowStaysOnTopHint | Qt.Tool)
self.__previewWidget.setAttribute(
Qt.WA_ShowWithoutActivating)
self.__previewWidget.setFocusPolicy(Qt.NoFocus)
self.__previewWidget.installEventFilter(self)
return self.__previewWidget
class ThumbnailView(QGraphicsView):
"""
A widget displaying a image thumbnail grid
"""
FixedColumnCount, AutoReflow = GraphicsThumbnailGrid.LayoutMode
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setRenderHint(QPainter.Antialiasing)
self.setRenderHint(QPainter.TextAntialiasing)
self.__layoutMode = ThumbnailView.AutoReflow
self.__columnCount = -1
self.__grid = GraphicsThumbnailGrid()
self.__grid.currentThumbnailChanged.connect(
self.__onCurrentThumbnailChanged)
self.__previewWidget = None
scene = GraphicsScene(self)
scene.addItem(self.__grid)
scene.selectionRectPointChanged.connect(self.__ensureVisible,
Qt.QueuedConnection)
self.setScene(scene)
sh = QShortcut(Qt.Key_Space,
self,
context=Qt.WidgetWithChildrenShortcut)
sh.activated.connect(self.__previewToggle)
self.__grid.geometryChanged.connect(self.__updateSceneRect)
@proxydoc(GraphicsThumbnailGrid.addThumbnail)
def addThumbnail(self, thumbnail):
self.__grid.addThumbnail(thumbnail)
@property
def grid(self):
return self.__grid
@proxydoc(GraphicsThumbnailGrid.insertThumbnail)
def insertThumbnail(self, index, thumbnail):
self.__grid.insertThumbnail(index, thumbnail)
@proxydoc(GraphicsThumbnailGrid.setFixedColumnCount)
def setFixedColumnCount(self, count):
self.__grid.setFixedColumnCount(count)
@proxydoc(GraphicsThumbnailGrid.setFixedRowCount)
def setFixedRowCount(self, count):
self.__grid.setFixedRowCount(count)
@proxydoc(GraphicsThumbnailGrid.setCrop)
def setCrop(self, crop):
self.__grid.setCrop(crop)
@proxydoc(GraphicsThumbnailGrid.count)
def count(self):
return self.__grid.count()
@proxydoc(GraphicsThumbnailGrid.grid_size)
def grid_size(self):
return self.__grid.grid_size()
def clear(self):
"""
Clear all thumbnails and close/delete the preview window if used.
"""
self.__grid.clear()
if self.__previewWidget is not None:
self.__closePreview()
def sizeHint(self):
return QSize(480, 480)
def __updateSceneRect(self):
self.scene().setSceneRect(self.scene().itemsBoundingRect())
# Full viewport update, otherwise contents outside the new
# sceneRect can persist on the viewport
self.viewport().update()
def resizeEvent(self, event):
super().resizeEvent(event)
if event.size().width() != event.oldSize().width():
width = event.size().width() - 2
self.__grid.setMaximumWidth(width)
self.__grid.setMinimumWidth(width)
if event.size().height() != event.oldSize().height():
height = event.size().height() - 2
self.__grid.setMaximumHeight(height)
self.__grid.setMinimumHeight(height)
def keyPressEvent(self, event):
if event.key() == Qt.Key_Escape and self.__previewWidget is not None:
self.__closePreview()
event.accept()
return
return super().keyPressEvent(event)
def __previewToggle(self):
if (self.__previewWidget is None
and self.__grid.currentItem() is not None):
focusitem = self.__grid.currentItem()
preview = self.__getPreviewWidget()
preview.show()
preview.raise_()
preview.setPixmap(focusitem.pixmap())
else:
self.__closePreview()
def __getPreviewWidget(self):
# return the preview image view widget
if self.__previewWidget is None:
self.__previewWidget = Preview(self)
self.__previewWidget.setWindowFlags(Qt.WindowStaysOnTopHint
| Qt.Tool)
self.__previewWidget.setAttribute(Qt.WA_ShowWithoutActivating)
self.__previewWidget.setFocusPolicy(Qt.NoFocus)
self.__previewWidget.installEventFilter(self)
return self.__previewWidget
def __updatePreviewPixmap(self):
current = self.__grid.currentItem()
if isinstance(current, GraphicsThumbnailWidget) and \
current.parentItem() is self.__grid and \
self.__previewWidget is not None:
self.__previewWidget.setPixmap(current.pixmap())
def __closePreview(self):
if self.__previewWidget is not None:
self.__previewWidget.close()
self.__previewWidget.setPixmap(QPixmap())
self.__previewWidget.deleteLater()
self.__previewWidget = None
def eventFilter(self, receiver, event):
if receiver is self.__previewWidget and \
event.type() == QEvent.KeyPress:
if event.key() in [
Qt.Key_Left, Qt.Key_Right, Qt.Key_Down, Qt.Key_Up
]:
self.__grid._moveCurrent(event.key())
event.accept()
return True
elif event.key() in [Qt.Key_Escape, Qt.Key_Space]:
self.__closePreview()
event.accept()
return True
return super().eventFilter(receiver, event)
def hideEvent(self, event):
super().hideEvent(event)
self.__closePreview()
def __onCurrentThumbnailChanged(self, thumbnail):
if thumbnail is not None:
self.__updatePreviewPixmap()
else:
self.__closePreview()
@Slot(QPointF)
def __ensureVisible(self, point):
self.ensureVisible(QRectF(point, QSizeF(1, 1)), 5, 5),
class ThumbnailView(QGraphicsView):
"""
A widget displaying a image thumbnail grid
"""
FixedColumnCount, AutoReflow = GraphicsThumbnailGrid.LayoutMode
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setRenderHint(QPainter.Antialiasing)
self.setRenderHint(QPainter.TextAntialiasing)
self.__layoutMode = ThumbnailView.AutoReflow
self.__columnCount = -1
self.__grid = GraphicsThumbnailGrid()
self.__grid.currentThumbnailChanged.connect(
self.__onCurrentThumbnailChanged
)
self.__previewWidget = None
scene = GraphicsScene(self)
scene.addItem(self.__grid)
scene.selectionRectPointChanged.connect(
self.__ensureVisible, Qt.QueuedConnection
)
self.setScene(scene)
sh = QShortcut(Qt.Key_Space, self,
context=Qt.WidgetWithChildrenShortcut)
sh.activated.connect(self.__previewToggle)
self.__grid.geometryChanged.connect(self.__updateSceneRect)
@proxydoc(GraphicsThumbnailGrid.addThumbnail)
def addThumbnail(self, thumbnail):
self.__grid.addThumbnail(thumbnail)
@proxydoc(GraphicsThumbnailGrid.insertThumbnail)
def insertThumbnail(self, index, thumbnail):
self.__grid.insertThumbnail(index, thumbnail)
@proxydoc(GraphicsThumbnailGrid.setFixedColumnCount)
def setFixedColumnCount(self, count):
self.__grid.setFixedColumnCount(count)
@proxydoc(GraphicsThumbnailGrid.setFixedRowCount)
def setFixedRowCount(self, count):
self.__grid.setFixedRowCount(count)
@proxydoc(GraphicsThumbnailGrid.setCrop)
def setCrop(self, crop):
self.__grid.setCrop(crop)
@proxydoc(GraphicsThumbnailGrid.count)
def count(self):
return self.__grid.count()
@proxydoc(GraphicsThumbnailGrid.grid_size)
def grid_size(self):
return self.__grid.grid_size()
def clear(self):
"""
Clear all thumbnails and close/delete the preview window if used.
"""
self.__grid.clear()
if self.__previewWidget is not None:
self.__closePreview()
def sizeHint(self):
return QSize(480, 480)
def __updateSceneRect(self):
self.scene().setSceneRect(self.scene().itemsBoundingRect())
# Full viewport update, otherwise contents outside the new
# sceneRect can persist on the viewport
self.viewport().update()
def resizeEvent(self, event):
super().resizeEvent(event)
if event.size().width() != event.oldSize().width():
width = event.size().width() - 2
self.__grid.setMaximumWidth(width)
self.__grid.setMinimumWidth(width)
if event.size().height() != event.oldSize().height():
height = event.size().height() - 2
self.__grid.setMaximumHeight(height)
self.__grid.setMinimumHeight(height)
def keyPressEvent(self, event):
if event.key() == Qt.Key_Escape and self.__previewWidget is not None:
self.__closePreview()
event.accept()
return
return super().keyPressEvent(event)
def __previewToggle(self):
if self.__previewWidget is None and self.__grid.currentItem() is not None:
focusitem = self.__grid.currentItem()
preview = self.__getPreviewWidget()
preview.show()
preview.raise_()
preview.setPixmap(focusitem.pixmap())
else:
self.__closePreview()
def __getPreviewWidget(self):
# return the preview image view widget
if self.__previewWidget is None:
self.__previewWidget = Preview(self)
self.__previewWidget.setWindowFlags(
Qt.WindowStaysOnTopHint | Qt.Tool)
self.__previewWidget.setAttribute(
Qt.WA_ShowWithoutActivating)
self.__previewWidget.setFocusPolicy(Qt.NoFocus)
self.__previewWidget.installEventFilter(self)
return self.__previewWidget
def __updatePreviewPixmap(self):
current = self.__grid.currentItem()
if isinstance(current, GraphicsThumbnailWidget) and \
current.parentItem() is self.__grid and \
self.__previewWidget is not None:
self.__previewWidget.setPixmap(current.pixmap())
def __closePreview(self):
if self.__previewWidget is not None:
self.__previewWidget.close()
self.__previewWidget.setPixmap(QPixmap())
self.__previewWidget.deleteLater()
self.__previewWidget = None
def eventFilter(self, receiver, event):
if receiver is self.__previewWidget and \
event.type() == QEvent.KeyPress:
if event.key() in [Qt.Key_Left, Qt.Key_Right,
Qt.Key_Down, Qt.Key_Up]:
self.__grid._moveCurrent(event.key())
event.accept()
return True
elif event.key() in [Qt.Key_Escape, Qt.Key_Space]:
self.__closePreview()
event.accept()
return True
return super().eventFilter(receiver, event)
def hideEvent(self, event):
super().hideEvent(event)
self.__closePreview()
def __onCurrentThumbnailChanged(self, thumbnail):
if thumbnail is not None:
self.__updatePreviewPixmap()
else:
self.__closePreview()
@Slot(QPointF)
def __ensureVisible(self, point):
self.ensureVisible(QRectF(point, QSizeF(1, 1)), 5, 5),