如何将自定义qwidget添加到QListWidget以获取列表小部件功能,如选择,滚动,改进内存管理等。
我的目标是创建一个类似于许多人在Photoshop或Affinity Photo等程序中看到的图层管理器。我最终将扩展我的LayerWidget以获得更多控件,而不仅仅是一个简单的Label和Checkbox。
此处的前一个问题(https://stackoverflow.com/a/30802784/3156300)用户提到使用QListWidget和QListWidgetItem来创建我正在尝试做的事情。然而,在进一步研究之后,我找不到如何获取我的自定义小部件并将其附加到listWidget,就像他提到的那样。
Photoshop /亲和力照片
import sys
from PySide import QtGui, QtCore
class LayerObject(object):
def __init__(self, **kwargs):
self.name = kwargs.get('name', '')
self.enabled = kwargs.get('enabled', False)
class LayerWidget(QtGui.QWidget):
def __init__(self, layer):
super(LayerWidget, self).__init__()
self.resize(400, 50)
# controls
self.ui_enabled = QtGui.QCheckBox()
self.ui_layername = QtGui.QLabel()
self.ui_items = QtGui.QComboBox()
self.ui_items.addItems(['Color','Saturation','Blend'])
main_layout = QtGui.QHBoxLayout()
main_layout.addWidget(self.ui_layername)
main_layout.addWidget(self.ui_items)
main_layout.addStretch()
main_layout.addWidget(self.ui_enabled)
self.setLayout(main_layout)
# construct
self._layer = None
self.layer = layer
# properties
@property
def layer(self):
return self._layer
@layer.setter
def layer(self, value):
self._layer== value
self.ui_layername.setText(value.name)
self.ui_enabled.setChecked(value.enabled)
class LayerManager(QtGui.QWidget):
def __init__(self):
super(LayerManager, self).__init__()
self.resize(400, 300)
# controls
self.ui_scroll = QtGui.QWidget()
self.ui_scroll_layout = QtGui.QVBoxLayout()
self.ui_scroll.setLayout(self.ui_scroll_layout)
self.ui_scroll_area = QtGui.QScrollArea()
self.ui_scroll_area.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
self.ui_scroll_area.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.ui_scroll_area.setWidgetResizable(True)
self.ui_scroll_area.setWidget(self.ui_scroll)
main_layout = QtGui.QHBoxLayout()
main_layout.addWidget(self.ui_scroll_area)
self.setLayout(main_layout)
self.add_layers()
def add_layers(self):
layers = [
LayerObject(name='Layer001', enabled=False),
LayerObject(name='Layer002', enabled=False),
LayerObject(name='Layer003', enabled=True),
LayerObject(name='Layer004', enabled=False),
LayerObject(name='Layer005', enabled=True),
LayerObject(name='Layer006', enabled=False),
LayerObject(name='Layer007', enabled=False),
LayerObject(name='Layer008', enabled=True),
LayerObject(name='Layer009', enabled=False),
LayerObject(name='Layer010', enabled=True)
]
for x in layers:
widget = LayerWidget(layer=x)
self.ui_scroll_layout.addWidget(widget)
def main():
app = QtGui.QApplication(sys.argv)
ex = LayerManager()
ex.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 0 :(得分:1)
添加小部件必须使用方法setItemWidget()
,对于此方法,您必须将方法传递给QListWidgetItem
,为此您可以通过insertItem()
方法添加方法。观察到的一个问题是项目的大小与小部件的大小不对应,为此您必须使用sizeHint()
:
class LayerManager(QtGui.QWidget):
def __init__(self):
super(LayerManager, self).__init__()
self.resize(400, 300)
self.list_widget = QtGui.QListWidget()
main_layout = QtGui.QHBoxLayout(self)
main_layout.addWidget(self.list_widget)
self.add_layers()
def add_layers(self):
layers = [
LayerObject(name='Layer001', enabled=False),
LayerObject(name='Layer002', enabled=False),
LayerObject(name='Layer003', enabled=True),
LayerObject(name='Layer004', enabled=False),
LayerObject(name='Layer005', enabled=True),
LayerObject(name='Layer006', enabled=False),
LayerObject(name='Layer007', enabled=False),
LayerObject(name='Layer008', enabled=True),
LayerObject(name='Layer009', enabled=False),
LayerObject(name='Layer010', enabled=True)
]
for x in layers:
widget = LayerWidget(layer=x)
item = QtGui.QListWidgetItem()
self.list_widget.insertItem(self.list_widget.count(), item)
self.list_widget.setItemWidget(item, widget)
item.setSizeHint(widget.sizeHint())