lua print_button script

also allow splash_scroller to be used as static text display

Change-Id: Idc8c9e60ada920e2d1abd5301b59bd235e21a1c2

apps/plugins/lua_scripts/print_buttons.lua

@@ -0,0 +1,70 @@
+-- bilgus 4/2021
+require "buttons"
+local BUTTON_NONE = 0
+
+local function decode_ord_btn(btn)
+    local btntxt = ""
+    for k, v in pairs(rb.buttons) do
+        if btn > BUTTON_NONE and v ~= BUTTON_NONE and bit.band(btn, v) == v then
+            if #btntxt > 0 then
+                btntxt = btntxt .. " | "
+            end
+            btntxt = btntxt .. k
+        end
+    end
+    if btntxt == "" then return nil end
+    return btntxt
+end
+
+local _, w, h = rb.font_getstringsize("W", rb.FONT_UI)
+local max_lines = rb.LCD_HEIGHT / h - 1
+
+button_text = {}
+for k, v in pairs(rb.buttons) do
+    button_text[v] = k
+end
+
+--Add the system button codes to the button_text table
+for k, v in pairs(rb) do
+    if string.find(k or "", "SYS_", 1, true) and type(v) == "number" then
+        button_text[v] = k
+    end
+end
+
+local s = {[1] = "Buttons Found:"}
+for k, v in pairs(button_text) do
+    table.insert(s, tostring(k) .. " : " .. tostring(v))
+end
+rb.splash_scroller(rb.HZ, table.concat(s, "\n"))
+
+button_text[BUTTON_NONE] = " "
+
+local lastbtn = BUTTON_NONE
+local lastkey = BUTTON_NONE
+local s_t = {"Press same button 3x to exit"}
+local keyrpt = 0
+
+repeat
+
+    local btn
+    if lastbtn == BUTTON_NONE then
+        btn = rb.button_get(true)
+    else
+        btn = rb.button_get_w_tmo(rb.HZ)
+    end
+
+    if btn ~= lastkey then
+        table.insert(s_t, 1, (button_text[btn] or decode_ord_btn(btn) or "unknown " .. tostring (btn)))
+    end
+
+    if btn == lastbtn then keyrpt = keyrpt + 1 end
+    if button_text[btn] then lastbtn = btn end
+    lastkey = btn
+
+    rb.splash_scroller(-2, table.concat(s_t, "\n"))
+
+    if #s_t > max_lines then
+        table.remove(s_t)
+    end
+
+until keyrpt >= 2