1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
"""PySide6 port of the Legend example from Qt v5.x"""
import sys
from PySide6.QtCore import Qt, QRectF, Slot
from PySide6.QtGui import QBrush, QColor, QPainter, QPen
from PySide6.QtWidgets import (QApplication, QDoubleSpinBox,
QFormLayout, QGridLayout, QGroupBox, QPushButton, QWidget)
from PySide6.QtCharts import QBarSeries, QBarSet, QChart, QChartView
class MainWidget(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.chart = QChart()
self.series = QBarSeries()
self.main_layout = QGridLayout()
self.button_layout = QGridLayout()
self.font_layout = QFormLayout()
self.font_size = QDoubleSpinBox()
self.legend_posx = QDoubleSpinBox()
self.legend_posy = QDoubleSpinBox()
self.legend_width = QDoubleSpinBox()
self.legend_height = QDoubleSpinBox()
self.detach_legend_button = QPushButton("Toggle attached")
self.detach_legend_button.clicked.connect(self.toggle_attached)
self.button_layout.addWidget(self.detach_legend_button, 0, 0)
self.add_set_button = QPushButton("add barset")
self.add_set_button.clicked.connect(self.add_barset)
self.button_layout.addWidget(self.add_set_button, 2, 0)
self.remove_barset_button = QPushButton("remove barset")
self.remove_barset_button.clicked.connect(self.remove_barset)
self.button_layout.addWidget(self.remove_barset_button, 3, 0)
self.align_button = QPushButton("Align (Bottom)")
self.align_button.clicked.connect(self.set_legend_alignment)
self.button_layout.addWidget(self.align_button, 4, 0)
self.bold_button = QPushButton("Toggle bold")
self.bold_button.clicked.connect(self.toggle_bold)
self.button_layout.addWidget(self.bold_button, 8, 0)
self.italic_button = QPushButton("Toggle italic")
self.italic_button.clicked.connect(self.toggle_italic)
self.button_layout.addWidget(self.italic_button, 9, 0)
self.legend_posx.valueChanged.connect(self.update_legend_layout)
self.legend_posy.valueChanged.connect(self.update_legend_layout)
self.legend_width.valueChanged.connect(self.update_legend_layout)
self.legend_height.valueChanged.connect(self.update_legend_layout)
legend_layout = QFormLayout()
legend_layout.addRow("HPos", self.legend_posx)
legend_layout.addRow("VPos", self.legend_posy)
legend_layout.addRow("Width", self.legend_width)
legend_layout.addRow("Height", self.legend_height)
self.legend_settings = QGroupBox("Detached legend")
self.legend_settings.setLayout(legend_layout)
self.button_layout.addWidget(self.legend_settings)
self.legend_settings.setVisible(False)
# Create chart view with the chart
self.chart_view = QChartView(self.chart, self)
# Create spinbox to modify font size
self.font_size.setValue(self.chart.legend().font().pointSizeF())
self.font_size.valueChanged.connect(self.font_size_changed)
self.font_layout.addRow("Legend font size", self.font_size)
# Create layout for grid and detached legend
self.main_layout.addLayout(self.button_layout, 0, 0)
self.main_layout.addLayout(self.font_layout, 1, 0)
self.main_layout.addWidget(self.chart_view, 0, 1, 3, 1)
self.setLayout(self.main_layout)
self.create_series()
def create_series(self):
self.add_barset()
self.add_barset()
self.add_barset()
self.add_barset()
self.chart.addSeries(self.series)
self.chart.setTitle("Legend detach example")
self.chart.createDefaultAxes()
self.chart.legend().setVisible(True)
self.chart.legend().setAlignment(Qt.AlignBottom)
self.chart_view.setRenderHint(QPainter.Antialiasing)
def show_legend_spinbox(self):
self.legend_settings.setVisible(True)
chart_viewrect = self.chart_view.rect()
self.legend_posx.setMinimum(0)
self.legend_posx.setMaximum(chart_viewrect.width())
self.legend_posx.setValue(150)
self.legend_posy.setMinimum(0)
self.legend_posy.setMaximum(chart_viewrect.height())
self.legend_posy.setValue(150)
self.legend_width.setMinimum(0)
self.legend_width.setMaximum(chart_viewrect.width())
self.legend_width.setValue(150)
self.legend_height.setMinimum(0)
self.legend_height.setMaximum(chart_viewrect.height())
self.legend_height.setValue(75)
def hide_legend_spinbox(self):
self.legend_settings.setVisible(False)
@Slot()
def toggle_attached(self):
legend = self.chart.legend()
if legend.isAttachedToChart():
legend.detachFromChart()
legend.setBackgroundVisible(True)
legend.setBrush(QBrush(QColor(128, 128, 128, 128)))
legend.setPen(QPen(QColor(192, 192, 192, 192)))
self.show_legend_spinbox()
self.update_legend_layout()
else:
legend.attachToChart()
legend.setBackgroundVisible(False)
self.hide_legend_spinbox()
self.update()
@Slot()
def add_barset(self):
series_count = self.series.count()
bar_set = QBarSet(f"set {series_count}")
delta = series_count * 0.1
bar_set.append([1 + delta, 2 + delta, 3 + delta, 4 + delta])
self.series.append(bar_set)
@Slot()
def remove_barset(self):
sets = self.series.barSets()
len_sets = len(sets)
if len_sets > 0:
self.series.remove(sets[len_sets - 1])
@Slot()
def set_legend_alignment(self):
button = self.sender()
legend = self.chart.legend()
alignment = legend.alignment()
if alignment == Qt.AlignTop:
legend.setAlignment(Qt.AlignLeft)
if button:
button.setText("Align (Left)")
elif alignment == Qt.AlignLeft:
legend.setAlignment(Qt.AlignBottom)
if button:
button.setText("Align (Bottom)")
elif alignment == Qt.AlignBottom:
legend.setAlignment(Qt.AlignRight)
if button:
button.setText("Align (Right)")
else:
if button:
button.setText("Align (Top)")
legend.setAlignment(Qt.AlignTop)
@Slot()
def toggle_bold(self):
legend = self.chart.legend()
font = legend.font()
font.setBold(not font.bold())
legend.setFont(font)
@Slot()
def toggle_italic(self):
legend = self.chart.legend()
font = legend.font()
font.setItalic(not font.italic())
legend.setFont(font)
@Slot()
def font_size_changed(self):
legend = self.chart.legend()
font = legend.font()
font_size = self.font_size.value()
if font_size < 1:
font_size = 1
font.setPointSizeF(font_size)
legend.setFont(font)
@Slot()
def update_legend_layout(self):
legend = self.chart.legend()
rect = QRectF(self.legend_posx.value(),
self.legend_posy.value(),
self.legend_width.value(),
self.legend_height.value())
legend.setGeometry(rect)
legend.update()
if __name__ == "__main__":
app = QApplication(sys.argv)
w = MainWidget()
available_geometry = w.screen().availableGeometry()
size = available_geometry.height() * 0.75
w.setFixedSize(size, size)
w.show()
sys.exit(app.exec())
|
