def mouseMoveEvent(self, event):
if not self.image_list.drag_icon:
return
if qt_version_info >= (6, 0):
pos = event.position()
else:
pos = event.pos()
if ((pos - self.drag_start_pos).manhattanLength() <
QtWidgets.QApplication.startDragDistance()):
return
if not self.get_selected():
# user has started dragging an unselected image
self.image_list.select_image(self)
paths = []
for image in self.image_list.get_selected_images():
paths.append(image.path)
if not paths:
return
drag = QtGui.QDrag(self)
# construct icon
count = min(len(paths), 8)
src_icon = self.image_list.drag_icon
src_w = src_icon.width()
src_h = src_icon.height()
margin = (count - 1) * 4
if count == 1:
icon = src_icon
else:
icon = QtGui.QPixmap(src_w + margin, src_h + margin)
icon.fill(Qt.transparent)
try:
paint = QtGui.QPainter(icon)
for i in range(count):
paint.drawPixmap(QtCore.QPoint(margin - (i * 4), i * 4),
src_icon)
finally:
del paint
drag.setPixmap(icon)
if self.image_list.drag_hotspot:
x, y = self.image_list.drag_hotspot
else:
x, y = src_w // 2, src_h
drag.setHotSpot(QtCore.QPoint(x, y + margin))
mimeData = QtCore.QMimeData()
mimeData.setData(DRAG_MIMETYPE, repr(paths).encode('utf-8'))
drag.setMimeData(mimeData)
if qt_version_info >= (6, 0):
drag.exec(Qt.CopyAction)
else:
drag.exec_(Qt.CopyAction)
def _do_layout(self, origin):
left, top, right, bottom = self.getContentsMargins()
width_hint = left + right
height_hint = top + bottom
if self.item_list:
item_size = self.item_list[0].sizeHint()
item_h = item_size.height()
item_w = item_size.width()
multi_row = self.viewport_size.height() - height_hint > item_h
if multi_row:
columns = max(
(self.viewport_size.width() - width_hint) // item_w, 1)
rows = (len(self.item_list) + columns - 1) // columns
else:
columns = len(self.item_list)
rows = 1
width_hint += columns * item_w
height_hint += rows * item_h
self.size_hint = QtCore.QSize(width_hint, height_hint)
if not self.item_list:
return
x = origin.x() + left
y = origin.y() + top
for n, item in enumerate(self.item_list):
i, j = n % columns, n // columns
item.setGeometry(
QtCore.QRect(QtCore.QPoint(x + (i * item_w), y + (j * item_h)),
item_size))
self.scroll_area.set_multi_row(multi_row)
def mouseMoveEvent(self, event):
if not self.image_list.drag_icon:
return
if ((event.pos() - self.drag_start_pos).manhattanLength() <
QtWidgets.QApplication.startDragDistance()):
return
paths = []
for image in self.image_list.get_selected_images():
paths.append(image.path)
if not paths:
return
drag = QtGui.QDrag(self)
# construct icon
count = min(len(paths), 8)
src_icon = self.image_list.drag_icon
src_w = src_icon.width()
src_h = src_icon.height()
margin = (count - 1) * 4
if count == 1:
icon = src_icon
else:
icon = QtGui.QPixmap(src_w + margin, src_h + margin)
icon.fill(Qt.transparent)
with QtGui.QPainter(icon) as paint:
for i in range(count):
paint.drawPixmap(
QtCore.QPoint(margin - (i * 4), i * 4), src_icon)
drag.setPixmap(icon)
if src_h == src_w:
# round marker used in Bing maps version 8
drag.setHotSpot(QtCore.QPoint(src_w // 2, (src_h // 2) + margin))
else:
drag.setHotSpot(QtCore.QPoint(src_w // 2, src_h + margin))
mimeData = QtCore.QMimeData()
mimeData.setData(DRAG_MIMETYPE, repr(paths).encode('utf-8'))
drag.setMimeData(mimeData)
dropAction = drag.exec_(Qt.CopyAction)
def _do_layout(self, rect, test_only):
left, top, right, bottom = self.getContentsMargins()
effective_rect = rect.adjusted(left, top, -right, -bottom)
x = effective_rect.x()
y = effective_rect.y()
row_height = 0
for item in self.item_list:
item_size = item.sizeHint()
if x + item_size.width() > effective_rect.right() and row_height > 0:
x = effective_rect.x()
y += row_height
row_height = 0
if not test_only:
item.setGeometry(QtCore.QRect(QtCore.QPoint(x, y), item_size))
x += item_size.width()
row_height = max(row_height, item_size.height())
return y + row_height - rect.y() + bottom
def set_viewport_size(self, size):
self.viewport_size = size
self._do_layout(QtCore.QPoint(0, 0))
def __init__(self, scroll_area=None, **kw):
super(ThumbsLayout, self).__init__(**kw)
self.scroll_area = scroll_area
self.item_list = []
self.viewport_size = QtCore.QSize()
self._do_layout(QtCore.QPoint(0, 0))
