From 47a866e2612223d5aa9e812454e0058876f4a40b Mon Sep 17 00:00:00 2001
From: Evgeny <zobnin@gmail.com>
Date: Sun, 8 Aug 2021 07:50:28 +0300
Subject: [PATCH] add calc sample

---
 lib/misc.lua     |  9 +++++++++
 samples/calc.lua | 29 +++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 lib/misc.lua
 create mode 100644 samples/calc.lua

diff --git a/lib/misc.lua b/lib/misc.lua
new file mode 100644
index 0000000..198bf14
--- /dev/null
+++ b/lib/misc.lua
@@ -0,0 +1,9 @@
+function parseHexColor(text)
+  local r = tonumber('0x' .. string.sub(text, -8, -7))
+  local g = tonumber('0x' .. string.sub(text, -6, -5))
+  local b = tonumber('0x' .. string.sub(text, -4, -3))
+  local a = tonumber('0x' .. string.sub(text, -2))
+
+  return r, g, b, a
+end
+
diff --git a/samples/calc.lua b/samples/calc.lua
new file mode 100644
index 0000000..3034a6c
--- /dev/null
+++ b/samples/calc.lua
@@ -0,0 +1,29 @@
+
+function on_alarm()
+    ui:show_text("Введите выражение")
+end
+
+function on_click()
+    ui:show_edit_dialog("Введите выражение")
+end
+
+function on_dialog_action(text)
+    if text == "" then
+        on_alarm()
+    else
+        ui:show_text(calculate_string(text))
+    end
+end
+
+function sqrt(x)
+    return math.sqrt(x)
+end
+
+function pow(x, y)
+    return math.pow(x,y)
+end
+
+function calculate_string(str)
+    return load("return "..str)
+end 
+