QGraphicsScene 忽略网格布局的延伸

Question

我有一个分为两个子小部件的小部件。一个显示图片，另一个提供编辑图片的选项。图片子小部件的水平 space 应该是编辑子小部件的 5 倍。我在网格布局中指定了这个约束。但是，只要我将 QGraphicsScene（和视图）添加到编辑子小部件，约束就会被忽略。

我尝试了几种尺寸政策，但其中 none 符合我的要求，但我对这些政策的使用经验不多。

class MapWidget(QWidget):
""" Widget that renders the map and displays properties """
    def __init__(self, main_gui, parent=None):
        super().__init__(parent=parent)
        self.main_gui = main_gui

        # (Re-)Build the ui
        self.layout = QGridLayout()
        self.setLayout(self.layout)

        self.map_scene = QGraphicsScene()
        self.map_scene_view = QGraphicsView()
        self.map_scene_view.setViewport(QGLWidget())
        self.map_scene_view.setScene(self.map_scene)
        self.layout.addWidget(self.map_scene_view, 1, 1, 5, 1)

        blocks_container = QVBoxLayout()
        self.layout.addLayout(blocks_container, 1, 2, 1, 1)

        """
        Here I add other widgets to the blocks_container, 
        however none of those causes problems
        """

        # As soon as I also add this group, both widgets have the same size 
        group_blocks = QGroupBox('Blocks')
        self.blocks_scene = QGraphicsScene()
        self.blocks_scene_view = QGraphicsView()
        self.blocks_scene_view.setViewport(QGLWidget())
        self.blocks_scene_view.setScene(self.blocks_scene)
        group_blocks_layout = QHBoxLayout()
        group_blocks.setLayout(group_blocks_layout)
        group_blocks_layout.addWidget(self.blocks_scene_view)
        blocks_container.addWidget(group_blocks)

两个小部件的比例不是 5/6 和 1/6，而是两个小部件共享相同的大小，这使得图片看起来很小而编辑小部件太大。此外，一旦我删除 'group_blocks' 小部件，编辑子小部件就会再次具有适当的大小。因此，为简单起见，我排除了它包含的所有其他小部件。

Answer 1

尝试并根据需要进行调整：

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore    import *
from PyQt5.QtGui     import *
from PyQt5.QtOpenGL  import *

class MapWidget(QWidget):
    """ Widget that renders the map and displays properties """

    def __init__(self, main_gui="???", parent=None):          # main_gui="???"
        super().__init__(parent=parent)
        self.main_gui = main_gui

        # (Re-)Build the ui
        self.layout = QGridLayout()
        self.setLayout(self.layout)

        self.map_scene = QGraphicsScene()
        self.map_scene_view = QGraphicsView()
        self.map_scene_view.setViewport(QGLWidget())
        self.map_scene_view.setScene(self.map_scene)

#        self.layout.addWidget(self.map_scene_view, 1, 1, 5, 1)
        self.layout.addWidget(self.map_scene_view, 1, 1, 5, 5)

        blocks_container = QVBoxLayout()

#        self.layout.addLayout(blocks_container, 1, 2, 1, 1)
        self.layout.addLayout(blocks_container, 1, 6, 5, 1)

        self.layout.setColumnMinimumWidth(1, 320)              # +++
        self.layout.setRowMinimumHeight(1, 200)                # +++
        self.layout.setColumnStretch(1, 5)                     # +++
        self.layout.setColumnStretch(6, 1)                     # +++

        """
        Here I add other widgets to the blocks_container, 
        however none of those causes problems
        """

        # As soon as I also add this group, both widgets have the same size 
        group_blocks = QGroupBox('Blocks')
        self.blocks_scene = QGraphicsScene()
        self.blocks_scene_view = QGraphicsView()
        self.blocks_scene_view.setViewport(QGLWidget())
        self.blocks_scene_view.setScene(self.blocks_scene)
        group_blocks_layout = QHBoxLayout()
        group_blocks.setLayout(group_blocks_layout)
        group_blocks_layout.addWidget(self.blocks_scene_view)
        blocks_container.addWidget(group_blocks)


if __name__=="__main__":
    app = QApplication(sys.argv)
    myapp = MapWidget()
    myapp.show()
    sys.exit(app.exec_())

QGraphicsScene 忽略网格布局的延伸

QGraphicsScene ignores Stretches of Grid Layout

python

pyqt

qsizepolicy

pyqt5