Pyqt5 关于流式布局和滚动条的综合使用示例代码

 m = self.contentsMargins() effective_rect = rect.adjusted(+m.left(), +m.top(), -m.right(), -m.bottom()) x = effective_rect.x() y = effective_rect.y() line_height = 0 for item in self._item_list: wid = item.widget() space_x = self.spacing() space_y = self.spacing() if wid is not None: space_x += wid.style().layoutSpacing( QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Horizontal) space_y += wid.style().layoutSpacing( QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Vertical) next_x = x + item.sizeHint().width() + space_x if next_x - space_x > effective_rect.right() and line_height > 0: x = effective_rect.x() y = y + line_height + space_y next_x = x + item.sizeHint().width() + space_x line_height = 0 if not test_only: item.setGeometry(QRect(QPoint(x, y), item.sizeHint())) x = next_x line_height = max(line_height, item.sizeHint().height())

 q = QWidget() qscrollarea = QtWidgets.QScrollArea(q)   qscrollarea.setGeometry(QRect(50,100,600,500)) qscrollarea.setWidgetResizable(True) listWidget = QtWidgets.QListWidget() qscrollarea.setWidget(listWidget)

 from PyQt5.QtCore import QPoint, QRect, QSize, Qt,pyqtSignal import os from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import ( QApplication, QLayout, QPushButton, QSizePolicy, QWidget, QGridLayout) import sys class Window(QWidget): def __init__(self): self.imageheight = 100 super(Window, self).__init__() self.resize(800, 600) #self.listwidget = QtWidgets.QListWidget(self) #self.listwidget.resize(400,300) #self.listwidget.setGeometry(QtCore.QRect(0, 0, 300, 200)) #self.listwidget.addItem("test") highlight_dir = r"./images" self.files_it = iter([os.path.join(highlight_dir, file) for file in os.listdir(highlight_dir)]) # self.centralwidget = QtWidgets.QWidget(MainWindow) # self.gongzuomoshi = QtWidgets.QGroupBox(self.centralwidget) self.listWidget = QtWidgets.QListWidget(self) #self.listWidget.setFixedWidth(600) container_layout = QtWidgets.QVBoxLayout() g = QtWidgets.QGroupBox('') l = FlowLayout() g.setLayout(l) for file in iter(self.files_it): pixmap = QtGui.QPixmap(file) if not pixmap.isNull(): autoWidth = pixmap.width()*self.imageheight/pixmap.height() label = QtWidgets.QLabel(pixmap=pixmap) label.setScaledContents(True) label.setFixedHeight(self.imageheight) label.setFixedWidth(autoWidth) l.addWidget(label) container_layout.addWidget(g) container_layout.addStretch() self.listWidget.setLayout(container_layout) self.qscrollarea = QtWidgets.QScrollArea(self) self.qscrollarea.setGeometry(QRect(50,100,600,500)) self.qscrollarea.setWidgetResizable(True) self.qscrollarea.setWidget(self.listWidget) self.set<em style="color:transparent">来源[email protected]搞@^&代*@码)网</em>WindowTitle("Flow Layout Scroll") class FlowLayout(QLayout): """流式布局,使用说明 1.声明流式布局 layout = FlowLayout 2.将元素放入流式布局中 3.将QGroupBox应用流式布局 4.如果期望水平流式,将QGroupBox放入到QHBoxLayout,如果期望垂直布局,将QGroupBox放入到QVBoxLayout """ heightChanged = pyqtSignal(int) def __init__(self, parent=None, margin=0, spacing=-1): super().__init__(parent) if parent is not None: self.setContentsMargins(margin, margin, margin, margin) self.setSpacing(spacing) self._item_list = [] def __del__(self): while self.count(): self.takeAt(0) def addItem(self, item): # pylint: disable=invalid-name self._item_list.append(item) def addSpacing(self, size): # pylint: disable=invalid-name self.addItem(QSpacerItem(size, 0, QSizePolicy.Fixed, QSizePolicy.Minimum)) def count(self): return len(self._item_list) def itemAt(self, index): # pylint: disable=invalid-name if 0 <= index <len(self._item_list): return self._item_list[index] return None def takeAt(self, index): # pylint: disable=invalid-name if 0 <= index  effective_rect.right() and line_height > 0: x = effective_rect.x() y = y + line_height + space_y next_x = x + item.sizeHint().width() + space_x line_height = 0 if not test_only: item.setGeometry(QRect(QPoint(x, y), item.sizeHint())) x = next_x line_height = max(line_height, item.sizeHint().height()) new_height = y + line_height - rect.y() self.heightChanged.emit(new_height) return new_height if __name__ == '__main__': app = QApplication(sys.argv) mainWin = Window() mainWin.show() sys.exit(app.exec_())