evan
97abf037b8
Follows the submodule: on_touch_down and friends become onTouchDown, the last snake_case left in the surface now that handlers are table fields rather than globals. main.lua declares SlateApp, this card's contract with its apps, and every app composes what it fills -- PaintApp is SlateApp plus TouchHandlers, Home is SlateApp alone -- which is also the only static record of the features an app needs.
49 lines
1.2 KiB
Lua
49 lines
1.2 KiB
Lua
local ui = require "ui"
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local FONT = screen.FONT_UI
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---@class HelloApp : SlateApp, TouchHandlers
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local M = {}
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local seconds = 0
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local uptime
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local function text()
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return "uptime: " .. seconds .. "s"
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end
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function M.init()
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timer.every(1000, function()
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seconds = seconds + 1
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ui.setText(uptime, text())
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end)
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log.info("hello app started, screen " .. screen.getWidth() .. "x" .. screen.getHeight())
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end
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function M.node()
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-- A fixed slot for the clock, because a node keeps the box it was measured with and the
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-- text grows a digit at a time.
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uptime = ui.text(text(), {
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w = screen.getTextWidth(FONT, "uptime: 00000s"),
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h = screen.getFontHeight(FONT),
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font = FONT,
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})
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return ui.box {
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w = "fill",
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h = "fill",
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pad = 10,
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gap = 20,
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ui.text("hello from sd card", { font = FONT }),
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ui.text("touch the screen", { font = FONT, color = ui.theme.muted }),
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uptime,
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}
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end
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-- Painted straight to the panel rather than as nodes: the dots are a scribble, and the
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-- tree would need one node each to remember them.
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function M.onTouch(x, y)
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log.info("touch at " .. x .. ", " .. y)
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screen.fillCircle(x, y, 6, ui.theme.accent)
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end
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return M
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