Used a single application instance in examples.

Each program must create only a single instance of `tkinter.Tk`, `wx.App`, `PyQt5.QtWidgets.QApplication` or `PyQt6.QtWidgets.QApplication`.

Author: tfpf

examples/examples_ScrollableAreaQt5.py

@@ -6,45 +6,47 @@
 
 from ScrollableContainers.Qt5 import ScrollableAreaQt5
 
-###############################################################################
 
-def grid_of_widgets():
-    app = QApplication([])
-    window = QMainWindow()
-    window.setWindowTitle('`ScrollableAreaQt5` demo')
+class ExamplesScrollableAreaQt5:
 
-    # Create a scrollable area.
-    scrollable_area = ScrollableAreaQt5()
+    def __init__(self):
+        self.grid_of_widgets(QMainWindow())
+        self.single_widget(QMainWindow())
 
-    # Add widgets to the `area` attribute of the scrollable area, not to the
-    # scrollable area itself.
-    dim = 10
-    grid_layout = QGridLayout(scrollable_area.area)
-    for (i, j) in itertools.product(range(dim), repeat=2):
-        grid_layout.addWidget(QLabel(text=f'Label\n({i}, {j})'), i, j)
+    def grid_of_widgets(self, window):
+        self.win1 = window
+        window.setWindowTitle('`ScrollableAreaQt5` demo')
 
-    window.setCentralWidget(scrollable_area)
-    window.show()
-    app.exec()
+        # Create a scrollable area.
+        scrollable_area = ScrollableAreaQt5()
 
-###############################################################################
+        # Add widgets to the `area` attribute of the scrollable area, not to
+        # the scrollable area itself.
+        dim = 10
+        grid_layout = QGridLayout(scrollable_area.area)
+        for (i, j) in itertools.product(range(dim), repeat=2):
+            label = QLabel(text=f'Label\n({i}, {j})')
+            grid_layout.addWidget(label, i, j)
 
-def single_widget():
-    app = QApplication([])
-    window = QMainWindow(size=QSize(600, 200))
-    window.setWindowTitle('`ScrollableAreaQt5` demo')
+        window.setCentralWidget(scrollable_area)
+        window.show()
 
-    scrollable_area = ScrollableAreaQt5()
+    def single_widget(self, window):
+        self.win2 = window
+        window.setWindowTitle('`ScrollableAreaQt5` demo')
+        window.resize(QSize(600, 200))
 
-    vbox = QVBoxLayout(scrollable_area.area)
-    vbox.addWidget(QLabel(text='big window, small label'))
+        scrollable_area = ScrollableAreaQt5()
 
-    window.setCentralWidget(scrollable_area)
-    window.show()
-    app.exec()
+        vbox = QVBoxLayout(scrollable_area.area)
+        label = QLabel(text='big window, small label')
+        vbox.addWidget(label)
+
+        window.setCentralWidget(scrollable_area)
+        window.show()
 
-###############################################################################
 
 if __name__ == '__main__':
-    grid_of_widgets()
-    single_widget()
+    app = QApplication([])
+    examples = ExamplesScrollableAreaQt5()
+    app.exec()

examples/examples_ScrollableAreaQt6.py

@@ -6,45 +6,47 @@
 
 from ScrollableContainers.Qt6 import ScrollableAreaQt6
 
-###############################################################################
 
-def grid_of_widgets():
-    app = QApplication([])
-    window = QMainWindow()
-    window.setWindowTitle('`ScrollableAreaQt6` demo')
+class ExamplesScrollableAreaQt6:
 
-    # Create a scrollable area.
-    scrollable_area = ScrollableAreaQt6()
+    def __init__(self):
+        self.grid_of_widgets(QMainWindow())
+        self.single_widget(QMainWindow())
 
-    # Add widgets to the `area` attribute of the scrollable area, not to the
-    # scrollable area itself.
-    dim = 10
-    grid_layout = QGridLayout(scrollable_area.area)
-    for (i, j) in itertools.product(range(dim), repeat=2):
-        grid_layout.addWidget(QLabel(text=f'Label\n({i}, {j})'), i, j)
+    def grid_of_widgets(self, window):
+        self.win1 = window
+        window.setWindowTitle('`ScrollableAreaQt6` demo')
 
-    window.setCentralWidget(scrollable_area)
-    window.show()
-    app.exec()
+        # Create a scrollable area.
+        scrollable_area = ScrollableAreaQt6()
 
-###############################################################################
+        # Add widgets to the `area` attribute of the scrollable area, not to
+        # the scrollable area itself.
+        dim = 10
+        grid_layout = QGridLayout(scrollable_area.area)
+        for (i, j) in itertools.product(range(dim), repeat=2):
+            label = QLabel(text=f'Label\n({i}, {j})')
+            grid_layout.addWidget(label, i, j)
 
-def single_widget():
-    app = QApplication([])
-    window = QMainWindow(size=QSize(600, 200))
-    window.setWindowTitle('`ScrollableAreaQt6` demo')
+        window.setCentralWidget(scrollable_area)
+        window.show()
 
-    scrollable_area = ScrollableAreaQt6()
+    def single_widget(self, window):
+        self.win2 = window
+        window.setWindowTitle('`ScrollableAreaQt5` demo')
+        window.resize(QSize(600, 200))
 
-    vbox = QVBoxLayout(scrollable_area.area)
-    vbox.addWidget(QLabel(text='big window, small label'))
+        scrollable_area = ScrollableAreaQt6()
 
-    window.setCentralWidget(scrollable_area)
-    window.show()
-    app.exec()
+        vbox = QVBoxLayout(scrollable_area.area)
+        label = QLabel(text='big window, small label')
+        vbox.addWidget(label)
+
+        window.setCentralWidget(scrollable_area)
+        window.show()
 
-###############################################################################
 
 if __name__ == '__main__':
-    grid_of_widgets()
-    single_widget()
+    app = QApplication([])
+    examples = ExamplesScrollableAreaQt6()
+    app.exec()

examples/examples_ScrollableFrameTk.py

@@ -6,63 +6,40 @@
 
 from ScrollableContainers.Tk import ScrollableFrameTk
 
-###############################################################################
 
-def grid_of_widgets():
-    root = tk.Tk()
-    root.title('`ScrollableFrameTk` Demo')
+class ExamplesScrollableFrameTk:
 
-    # Create a scrollable frame.
-    scrollable_frame = ScrollableFrameTk(root)
+    def __init__(self):
+        self.grid_of_widgets(tk.Tk())
+        self.single_widget(tk.Toplevel())
 
-    # Add widgets to the `frame` attribute of the scrollable frame, not to the
-    # scrollable frame itself.
-    dim = 10
-    for (i, j) in itertools.product(range(dim), repeat=2):
-        tk.Label(scrollable_frame.frame, text=f'Label\n({i}, {j})').grid(row=i, column=j, padx=10, pady=10)
+    def grid_of_widgets(self, window):
+        window.title('`ScrollableFrameTk` Demo')
 
-    scrollable_frame.pack(expand=True, fill=tk.BOTH)
-    root.mainloop()
+        # Create a scrollable frame.
+        scrollable_frame = ScrollableFrameTk(window)
 
-###############################################################################
+        # Add widgets to the `frame` attribute of the scrollable frame, not to
+        # the scrollable frame itself.
+        dim = 10
+        for (i, j) in itertools.product(range(dim), repeat=2):
+            label = ttk.Label(scrollable_frame.frame, text=f'Label\n({i}, {j})')
+            label.grid(row=i, column=j, padx=10, pady=10)
 
-def single_widget():
-    root = tk.Tk()
-    root.geometry('600x200+50+50')
-    root.title('`ScrollableFrameTk` Demo')
+        scrollable_frame.pack(expand=True, fill=tk.BOTH)
 
-    scrollable_frame = ScrollableFrameTk(root)
+    def single_widget(self, window):
+        window.geometry('600x200+50+50')
+        window.title('`ScrollableFrameTk` Demo')
 
-    tk.Label(scrollable_frame.frame, text='big window, small label').pack()
+        scrollable_frame = ScrollableFrameTk(window)
 
-    scrollable_frame.pack(expand=True, fill=tk.BOTH)
-    root.mainloop()
+        label = ttk.Label(scrollable_frame.frame, text='big window, small label')
+        label.pack()
 
-###############################################################################
+        scrollable_frame.pack(expand=True, fill=tk.BOTH)
 
-def entry_form_multiple():
-    root = tk.Tk()
-    root.title('`ScrollableFrameTk` Demo')
-
-    labels = ('Name', 'Age', 'City', 'PIN', 'Occupation', 'Company', 'Profession')
-
-    leftframe = ScrollableFrameTk(root)
-    for (i, label) in enumerate(labels):
-        tk.Label(leftframe.frame, text=label).grid(row=i, column=0, padx=10, pady=15)
-        tk.Entry(leftframe.frame).grid(row=i, column=1, padx=10, pady=15)
-
-    rightframe = ScrollableFrameTk(root)
-    for (i, label) in enumerate(reversed(labels)):
-        tk.Label(rightframe.frame, text=label).grid(row=i, column=0, padx=10, pady=15)
-        tk.Entry(rightframe.frame).grid(row=i, column=1, padx=10, pady=15)
-
-    leftframe.pack(expand=True, fill=tk.BOTH, side=tk.LEFT)
-    rightframe.pack(expand=True, fill=tk.BOTH, side=tk.RIGHT)
-    root.mainloop()
-
-###############################################################################
 
 if __name__ == '__main__':
-    grid_of_widgets()
-    single_widget()
-    entry_form_multiple()
+    examples = ExamplesScrollableFrameTk()
+    tk.mainloop()

examples/examples_ScrollablePanelWx.py

@@ -5,43 +5,44 @@
 
 from ScrollableContainers.Wx import ScrollablePanelWx
 
-###############################################################################
 
-def grid_of_widgets():
-    app = wx.App()
-    root = wx.Frame(None, title='`ScrollablePanelWx` Demo')
+class ExamplesScrollablePanelWx:
 
-    # Create a scrollable panel.
-    scrollable_panel = ScrollablePanelWx(root)
+    def __init__(self):
+        self.grid_of_widgets(wx.Frame(None))
+        self.single_widget(wx.Frame(None))
 
-    # Add widgets to the `panel` attribute of the scrollable panel, not to the
-    # scrollable panel itself.
-    dim = 10
-    grid_sizer = wx.GridSizer(dim, dim, 20, 20)
-    for (i, j) in itertools.product(range(dim), repeat=2):
-        grid_sizer.Add(wx.StaticText(scrollable_panel.panel, label=f'Label\n({i}, {j})'))
+    def grid_of_widgets(self, window):
+        window.SetTitle('`ScrollablePanelWx` Demo')
 
-    scrollable_panel.panel.SetSizer(grid_sizer)
-    scrollable_panel.SetupScrolling()
-    root.Show()
-    app.MainLoop()
+        # Create a scrollable panel.
+        scrollable_panel = ScrollablePanelWx(window)
 
-###############################################################################
+        # Add widgets to the `panel` attribute of the scrollable panel, not to
+        # the scrollable panel itself.
+        dim = 10
+        grid_sizer = wx.GridSizer(dim, dim, 20, 20)
+        for (i, j) in itertools.product(range(dim), repeat=2):
+            text = wx.StaticText(scrollable_panel.panel, label=f'Label\n({i}, {j})')
+            grid_sizer.Add(text)
 
-def single_widget():
-    app = wx.App()
-    root = wx.Frame(None, title='`ScrollablePanelWx` Demo', size=(600, 200))
+        scrollable_panel.panel.SetSizer(grid_sizer)
+        scrollable_panel.SetupScrolling()
+        window.Show()
 
-    scrollable_panel = ScrollablePanelWx(root)
+    def single_widget(self, window):
+        window.SetTitle('`ScrollablePanelWx` Demo')
+        window.SetSize(600, 200)
 
-    wx.StaticText(scrollable_panel.panel, label='big window, small label')
+        scrollable_panel = ScrollablePanelWx(window)
 
-    scrollable_panel.SetupScrolling()
-    root.Show()
-    app.MainLoop()
+        wx.StaticText(scrollable_panel.panel, label='big window, small label')
+
+        scrollable_panel.SetupScrolling()
+        window.Show()
 
-###############################################################################
 
 if __name__ == '__main__':
-    grid_of_widgets()
-    single_widget()
+    app = wx.App()
+    examples = ExamplesScrollablePanelWx()
+    app.MainLoop()