aboutsummaryrefslogtreecommitdiffstats
path: root/examples/widgets/layouts/flowlayout/flowlayout.py
diff options
context:
space:
mode:
Diffstat (limited to 'examples/widgets/layouts/flowlayout/flowlayout.py')
-rw-r--r--examples/widgets/layouts/flowlayout/flowlayout.py160
1 files changed, 160 insertions, 0 deletions
diff --git a/examples/widgets/layouts/flowlayout/flowlayout.py b/examples/widgets/layouts/flowlayout/flowlayout.py
new file mode 100644
index 000000000..8f4d41480
--- /dev/null
+++ b/examples/widgets/layouts/flowlayout/flowlayout.py
@@ -0,0 +1,160 @@
+
+############################################################################
+##
+## Copyright (C) 2013 Riverbank Computing Limited.
+## Copyright (C) 2020 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the Qt for Python examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## You may use this file under the terms of the BSD license as follows:
+##
+## "Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions are
+## met:
+## * Redistributions of source code must retain the above copyright
+## notice, this list of conditions and the following disclaimer.
+## * Redistributions in binary form must reproduce the above copyright
+## notice, this list of conditions and the following disclaimer in
+## the documentation and/or other materials provided with the
+## distribution.
+## * Neither the name of The Qt Company Ltd nor the names of its
+## contributors may be used to endorse or promote products derived
+## from this software without specific prior written permission.
+##
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+"""PySide6 port of the widgets/layouts/flowlayout example from Qt v5.x"""
+
+import sys
+from PySide6.QtCore import Qt, QMargins, QPoint, QRect, QSize
+from PySide6.QtWidgets import (QApplication, QLayout, QPushButton,
+ QSizePolicy, QWidget)
+
+
+class Window(QWidget):
+ def __init__(self):
+ super(Window, self).__init__()
+
+ flowLayout = FlowLayout(self)
+ flowLayout.addWidget(QPushButton("Short"))
+ flowLayout.addWidget(QPushButton("Longer"))
+ flowLayout.addWidget(QPushButton("Different text"))
+ flowLayout.addWidget(QPushButton("More text"))
+ flowLayout.addWidget(QPushButton("Even longer button text"))
+
+ self.setWindowTitle("Flow Layout")
+
+
+class FlowLayout(QLayout):
+ def __init__(self, parent=None):
+ super(FlowLayout, self).__init__(parent)
+
+ if parent is not None:
+ self.setContentsMargins(QMargins(0, 0, 0, 0))
+
+ self._item_list = []
+
+ def __del__(self):
+ item = self.takeAt(0)
+ while item:
+ item = self.takeAt(0)
+
+ def addItem(self, item):
+ self._item_list.append(item)
+
+ def count(self):
+ return len(self._item_list)
+
+ def itemAt(self, index):
+ if index >= 0 and index < len(self._item_list):
+ return self._item_list[index]
+
+ return None
+
+ def takeAt(self, index):
+ if index >= 0 and index < len(self._item_list):
+ return self._item_list.pop(index)
+
+ return None
+
+ def expandingDirections(self):
+ return Qt.Orientations(Qt.Orientation(0))
+
+ def hasHeightForWidth(self):
+ return True
+
+ def heightForWidth(self, width):
+ height = self._do_layout(QRect(0, 0, width, 0), True)
+ return height
+
+ def setGeometry(self, rect):
+ super(FlowLayout, self).setGeometry(rect)
+ self._do_layout(rect, False)
+
+ def sizeHint(self):
+ return self.minimumSize()
+
+ def minimumSize(self):
+ size = QSize()
+
+ for item in self._item_list:
+ size = size.expandedTo(item.minimumSize())
+
+ size += QSize(2 * self.contentsMargins().top(),
+ 2 * self.contentsMargins().top())
+ return size
+
+ def _do_layout(self, rect, test_only):
+ x = rect.x()
+ y = rect.y()
+ line_height = 0
+ spacing = self.spacing()
+
+ for item in self._item_list:
+ style = item.widget().style()
+ layout_spacing_x = style.layoutSpacing(QSizePolicy.PushButton,
+ QSizePolicy.PushButton,
+ Qt.Horizontal)
+ layout_spacing_y = style.layoutSpacing(QSizePolicy.PushButton,
+ QSizePolicy.PushButton,
+ Qt.Vertical)
+ space_x = spacing + layout_spacing_x
+ space_y = spacing + layout_spacing_y
+ next_x = x + item.sizeHint().width() + space_x
+ if next_x - space_x > rect.right() and line_height > 0:
+ x = 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())
+
+ return y + line_height - rect.y()
+
+
+if __name__ == '__main__':
+ app = QApplication(sys.argv)
+ mainWin = Window()
+ mainWin.show()
+ sys.exit(app.exec_())