62 lines
1.3 KiB
Python
62 lines
1.3 KiB
Python
#!/opt/bin/lv_micropython -i
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import usys as sys
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import lvgl as lv
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import display_driver
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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_cogwheel_argb.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_cogwheel_argb.png")
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sys.exit()
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img_cogwheel_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 set_angle(img, v):
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img.set_angle(v)
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def set_zoom(img, v):
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img.set_zoom(v)
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#
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# Show transformations (zoom and rotation) using a pivot point.
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#
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# Now create the actual image
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img = lv.img(lv.scr_act())
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img.set_src(img_cogwheel_argb)
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img.align(lv.ALIGN.CENTER, 50, 50)
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img.set_pivot(0, 0) # Rotate around the top left corner
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a1 = lv.anim_t()
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a1.init()
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a1.set_var(img)
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a1.set_custom_exec_cb(lambda a,val: set_angle(img,val))
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a1.set_values(0, 3600)
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a1.set_time(5000)
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a1.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
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lv.anim_t.start(a1)
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a2 = lv.anim_t()
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a2.init()
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a2.set_var(img)
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a2.set_custom_exec_cb(lambda a,val: set_zoom(img,val))
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a2.set_values(128, 256)
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a2.set_time(5000)
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a2.set_playback_time(3000)
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a2.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
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lv.anim_t.start(a2)
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