mirror of https://github.com/arendst/Tasmota.git
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
#- LVGL Examples
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-
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- drawing example #2 from https://docs.lvgl.io/latest/en/html/overview/drawing.html
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--#
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lv.start()
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lv.scr_act().set_style_local_bg_color(lv.OBJ_PART_MAIN, lv.STATE_DEFAULT, lv_color(0xAAAAAA))
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MASK_WIDTH=100
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MASK_HEIGHT=50
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# Create the mask of a text by drawing it to a canvas
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mask_map = bytes()
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mask_map.resize(MASK_WIDTH * MASK_HEIGHT * 4)
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# Create a "8 bit alpha" canvas and clear it
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canvas = lv_canvas(lv.scr_act())
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canvas.set_buffer(mask_map, MASK_WIDTH, MASK_HEIGHT, lv.IMG_CF_ALPHA_8BIT)
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canvas.fill_bg(lv_color(lv.BLACK), lv.OPA_TRANSP)
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canvas.fill_bg(lv_color(lv.BLACK), lv.OPA_50)
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# Draw a label to the canvas. The result "image" will be used as mask
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label_dsc = lv_draw_label_dsc()
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lv.draw_label_dsc_init(label_dsc)
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label_dsc.color = lv_color(lv.WHITE)
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canvas.draw_text(5, 5, MASK_WIDTH, label_dsc, "Text with gradient", lv.LABEL_ALIGN_CENTER)
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# The mask is read, the canvas is not required anymore
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canvas.del()
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# Create an object mask which will use the created mask
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om = lv_objmask(lv.scr_act())
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om.set_size(MASK_WIDTH, MASK_HEIGHT)
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om.align(0, lv.ALIGN_CENTER, 0, 0)
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# Add the created mask map to the object mask
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m = lv_draw_mask_map_param()
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a = lv_area()
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a.x1 = 0
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a.y1 = 0
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a.x2 = MASK_WIDTH - 1
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a.y2 = MASK_HEIGHT - 1
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lv.draw_mask_map_init(m, a, mask_map)
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om.add_mask(m)
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# Create a style with gradient
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style_bg = lv_style()
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style_bg.set_bg_opa(lv.STATE_DEFAULT, lv.OPA_COVER)
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style_bg.set_bg_color(lv.STATE_DEFAULT, lv_color(lv.RED))
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style_bg.set_bg_grad_color(lv.STATE_DEFAULT, lv_color(lv.BLUE))
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style_bg.set_bg_grad_dir(lv.STATE_DEFAULT, lv.GRAD_DIR_HOR)
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# Create and object with the gradient style on the object mask.
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# The text will be masked from the gradient
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bg = lv_obj(om)
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bg.reset_style_list(lv.OBJ_PART_MAIN)
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bg.add_style(lv.OBJ_PART_MAIN, style_bg)
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bg.set_size(MASK_WIDTH, MASK_HEIGHT)
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