83 lines
2.4 KiB
Python
83 lines
2.4 KiB
Python
#!/usr/bin/env python3
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from random import randint, shuffle, uniform
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import nanogui
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from nanogui import BoxLayout, Color, Label, Orientation, Screen, Widget, Window, glfw
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from nanogui.nanovg import RGB
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from knob import Knob
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class KnobsApp(Screen):
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def __init__(self, size=(450, 250)):
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super().__init__(size, "NanoGUI Knobs")
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self.set_background(Color(96, 96, 96, 255))
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self.win = Window(self, "Envelope")
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self.win.set_layout(BoxLayout(Orientation.Horizontal, margin=20, spacing=20))
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self.resize_event(size)
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knobs = (
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("Attack", 0.0, 0.0, 5.0, "s", 0.01),
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("Decay", 0.0, 0.0, 5.0, "s", 0.01),
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("Sustain", 0.0, 0.0, 100.0, "%", 0.01),
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("Release", 0.0, 0.0, 5.0, "s", 0.01),
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)
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self.knobs = []
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self.entries = []
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self.labels = []
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for i, knobspec in enumerate(knobs):
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box = Widget(self.win)
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box.set_layout(BoxLayout(Orientation.Vertical, spacing=10))
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rgb = [128 + randint(0, 127), randint(0, 127), 64]
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shuffle(rgb)
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knob = Knob(box, *knobspec)
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knob.color = RGB(*rgb)
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knob.value = round(uniform(knob.min_val, knob.max_val), 2)
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self.knobs.append(knob)
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self.entries.append(knob.create_value_entry(box))
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self.labels.append(Label(box, knob.label, font="sans", font_size=20))
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self.draw_all()
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self.set_visible(True)
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self.perform_layout()
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def resize_event(self, size):
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self.win.set_fixed_size(size)
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self.win.set_size(size)
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self.win.center()
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self.win.perform_layout(self.nvg_context())
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super().resize_event(size)
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return True
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def keyboard_event(self, key, scancode, action, modifiers):
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if super().keyboard_event(key, scancode, action, modifiers):
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return True
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if key == glfw.KEY_ESCAPE and action == glfw.PRESS:
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self.set_visible(False)
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return True
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return True
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def __del__(self):
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# callbacks referencing other widgets cause memory leakage at cleanup
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for entry in self.entries:
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entry.set_callback(lambda x: True)
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for entry in self.knobs:
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entry.set_callback(lambda x: True)
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if __name__ == "__main__":
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import gc
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nanogui.init()
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app = KnobsApp()
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nanogui.mainloop(refresh=1 / 60.0 * 1000)
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del app
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gc.collect()
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nanogui.shutdown()
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