71 lines
2.1 KiB
Python
71 lines
2.1 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 create_slider(color):
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slider = lv.slider(lv.scr_act())
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slider.set_range(0, 255)
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slider.set_size(10, 200)
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slider.set_style_bg_color(color, lv.PART.KNOB)
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slider.set_style_bg_color(color.color_darken(lv.OPA._40), lv.PART.INDICATOR)
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slider.add_event_cb(slider_event_cb, lv.EVENT.VALUE_CHANGED, None)
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return slider
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def slider_event_cb(e):
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# Recolor the image based on the sliders' values
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color = lv.color_make(red_slider.get_value(), green_slider.get_value(), blue_slider.get_value())
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intense = intense_slider.get_value()
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img1.set_style_img_recolor_opa(intense, 0)
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img1.set_style_img_recolor(color, 0)
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#
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# Demonstrate runtime image re-coloring
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#
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# Create 4 sliders to adjust RGB color and re-color intensity
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red_slider = create_slider(lv.palette_main(lv.PALETTE.RED))
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green_slider = create_slider(lv.palette_main(lv.PALETTE.GREEN))
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blue_slider = create_slider(lv.palette_main(lv.PALETTE.BLUE))
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intense_slider = create_slider(lv.palette_main(lv.PALETTE.GREY))
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red_slider.set_value(lv.OPA._20, lv.ANIM.OFF)
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green_slider.set_value(lv.OPA._90, lv.ANIM.OFF)
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blue_slider.set_value(lv.OPA._60, lv.ANIM.OFF)
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intense_slider.set_value(lv.OPA._50, lv.ANIM.OFF)
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red_slider.align(lv.ALIGN.LEFT_MID, 25, 0)
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green_slider.align_to(red_slider, lv.ALIGN.OUT_RIGHT_MID, 25, 0)
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blue_slider.align_to(green_slider, lv.ALIGN.OUT_RIGHT_MID, 25, 0)
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intense_slider.align_to(blue_slider, lv.ALIGN.OUT_RIGHT_MID, 25, 0)
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# Now create the actual image
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img1 = lv.img(lv.scr_act())
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img1.set_src(img_cogwheel_argb)
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img1.align(lv.ALIGN.RIGHT_MID, -20, 0)
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lv.event_send(intense_slider, lv.EVENT.VALUE_CHANGED, None)
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