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54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
2 years ago
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from imagetools import get_png_info, open_png
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# Register PNG image decoder
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decoder = lv.img.decoder_create()
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decoder.info_cb = get_png_info
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decoder.open_cb = open_png
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# Create an image from the png file
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try:
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with open('../../assets/img_caret_down.png','rb') as f:
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png_data = f.read()
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except:
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print("Could not find img_caret_down.png")
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sys.exit()
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img_caret_down_argb = lv.img_dsc_t({
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'data_size': len(png_data),
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'data': png_data
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})
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def event_cb(e):
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dropdown = e.get_target()
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option = " "*64 # should be large enough to store the option
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dropdown.get_selected_str(option, len(option))
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print(option.strip() +" is selected")
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#
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# Create a menu from a drop-down list and show some drop-down list features and styling
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#
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# Create a drop down list
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dropdown = lv.dropdown(lv.scr_act())
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dropdown.align(lv.ALIGN.TOP_LEFT, 10, 10)
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dropdown.set_options("\n".join([
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"New project",
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"New file",
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"Open project",
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"Recent projects",
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"Preferences",
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"Exit"]))
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# Set a fixed text to display on the button of the drop-down list
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dropdown.set_text("Menu")
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# Use a custom image as down icon and flip it when the list is opened
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# LV_IMG_DECLARE(img_caret_down)
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dropdown.set_symbol(img_caret_down_argb)
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dropdown.set_style_transform_angle(1800, lv.PART.INDICATOR | lv.STATE.CHECKED)
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# In a menu we don't need to show the last clicked item
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dropdown.set_selected_highlight(False)
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dropdown.add_event_cb(event_cb, lv.EVENT.VALUE_CHANGED, None)
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