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Merge pull request #19 from nodedge/feature/palette
Add palette viewer.
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Original file line number | Diff line number | Diff line change |
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# Copyright (C) 2013 Riverbank Computing Limited. | ||
# Copyright (C) 2022 The Qt Company Ltd. | ||
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause | ||
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"""PySide6 port of the widgets/layouts/flowlayout example from Qt v6.x""" | ||
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import sys | ||
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from PySide6.QtCore import QMargins, QPoint, QRect, QSize, Qt | ||
from PySide6.QtWidgets import QApplication, QLayout, QPushButton, QSizePolicy, QWidget | ||
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class Window(QWidget): | ||
def __init__(self): | ||
super().__init__() | ||
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flow_layout = FlowLayout(self) | ||
flow_layout.addWidget(QPushButton("Short")) | ||
flow_layout.addWidget(QPushButton("Longer")) | ||
flow_layout.addWidget(QPushButton("Different text")) | ||
flow_layout.addWidget(QPushButton("More text")) | ||
flow_layout.addWidget(QPushButton("Even longer button text")) | ||
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self.setWindowTitle("Flow Layout") | ||
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class FlowLayout(QLayout): | ||
def __init__(self, parent=None): | ||
super().__init__(parent) | ||
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if parent is not None: | ||
self.setContentsMargins(QMargins(0, 0, 0, 0)) | ||
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self._item_list = [] | ||
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def __del__(self): | ||
item = self.takeAt(0) | ||
while item: | ||
item = self.takeAt(0) | ||
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def addItem(self, item): | ||
self._item_list.append(item) | ||
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def count(self): | ||
return len(self._item_list) | ||
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def itemAt(self, index): | ||
if 0 <= index < len(self._item_list): | ||
return self._item_list[index] | ||
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return None | ||
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def takeAt(self, index): | ||
if 0 <= index < len(self._item_list): | ||
return self._item_list.pop(index) | ||
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return None | ||
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def expandingDirections(self): | ||
return Qt.Orientation(0) | ||
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def hasHeightForWidth(self): | ||
return True | ||
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def heightForWidth(self, width): | ||
height = self._do_layout(QRect(0, 0, width, 0), True) | ||
return height | ||
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def setGeometry(self, rect): | ||
super(FlowLayout, self).setGeometry(rect) | ||
self._do_layout(rect, False) | ||
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def sizeHint(self): | ||
return self.minimumSize() | ||
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def minimumSize(self): | ||
size = QSize() | ||
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for item in self._item_list: | ||
size = size.expandedTo(item.minimumSize()) | ||
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size += QSize( | ||
2 * self.contentsMargins().top(), 2 * self.contentsMargins().top() | ||
) | ||
return size | ||
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def _do_layout(self, rect, test_only): | ||
x = rect.x() | ||
y = rect.y() | ||
line_height = 0 | ||
spacing = self.spacing() | ||
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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 | ||
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if not test_only: | ||
item.setGeometry(QRect(QPoint(x, y), item.sizeHint())) | ||
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x = next_x | ||
line_height = max(line_height, item.sizeHint().height()) | ||
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return y + line_height - rect.y() | ||
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if __name__ == "__main__": | ||
app = QApplication(sys.argv) | ||
main_win = Window() | ||
main_win.show() | ||
sys.exit(app.exec()) |
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