82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
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_star.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 star.png")
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sys.exit()
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img_star_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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code = e.get_code()
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obj = e.get_target()
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dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
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if code == lv.EVENT.DRAW_PART_BEGIN:
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# Change the draw descriptor the 2nd button
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if dsc.id == 1:
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dsc.rect_dsc.radius = 0
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if obj.get_selected_btn() == dsc.id:
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dsc.rect_dsc.bg_color = lv.palette_darken(lv.PALETTE.GREY, 3)
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else:
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dsc.rect_dsc.bg_color = lv.palette_main(lv.PALETTE.BLUE)
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dsc.rect_dsc.shadow_width = 6
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dsc.rect_dsc.shadow_ofs_x = 3
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dsc.rect_dsc.shadow_ofs_y = 3
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dsc.label_dsc.color = lv.color_white()
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# Change the draw descriptor the 3rd button
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elif dsc.id == 2:
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dsc.rect_dsc.radius = lv.RADIUS.CIRCLE
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if obj.get_selected_btn() == dsc.id:
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dsc.rect_dsc.bg_color = lv.palette_darken(lv.PALETTE.RED, 3)
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else:
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dsc.rect_dsc.bg_color = lv.palette_main(lv.PALETTE.RED)
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dsc.label_dsc.color = lv.color_white()
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elif dsc.id == 3:
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dsc.label_dsc.opa = lv.OPA.TRANSP # Hide the text if any
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if code == lv.EVENT.DRAW_PART_END:
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# Add custom content to the 4th button when the button itself was drawn
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if dsc.id == 3:
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# LV_IMG_DECLARE(img_star)
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header = lv.img_header_t()
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res = lv.img.decoder_get_info(img_star_argb, header)
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if res != lv.RES.OK:
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print("error when getting image header")
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return
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else:
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a = lv.area_t()
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a.x1 = dsc.draw_area.x1 + (dsc.draw_area.get_width() - header.w) // 2
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a.x2 = a.x1 + header.w - 1
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a.y1 = dsc.draw_area.y1 + (dsc.draw_area.get_height() - header.h) // 2
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a.y2 = a.y1 + header.h - 1
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img_draw_dsc = lv.draw_img_dsc_t()
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img_draw_dsc.init()
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img_draw_dsc.recolor = lv.color_black()
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if obj.get_selected_btn() == dsc.id:
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img_draw_dsc.recolor_opa = lv.OPA._30
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dsc.draw_ctx.img(img_draw_dsc, a, img_star_argb)
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#
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# Add custom drawer to the button matrix to c
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#
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btnm = lv.btnmatrix(lv.scr_act())
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btnm.add_event_cb(event_cb, lv.EVENT.ALL, None)
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btnm.center()
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