Update main.py

LICENSE

@@ -1,29 +1,47 @@
-MIT License
+                 GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
-Copyright (c) 2026 Survivalful (https://Survivalful.de/)
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+                            Preamble
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
 
-Any use of this Software, in whole or in part, must visibly credit the original
-author: Survivalful (https://Survivalful.de/)
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
 
-This credit must appear in at least one of the following:
-- The application's user interface (e.g. About screen or footer)
-- The project's README or documentation
-- The source code as a comment
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  Finally, any free program is threatened constantly by
+software patents.  We wish to ensure that a free program has all the
+rights that its distributors can provide, so we will not allow patents to
+restrict the program.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to

README.md

@@ -1,6 +1,9 @@
+
+---
+
 # 🧮 Survivalcalc
 
-A modern desktop calculator with advanced features for area and volume calculations, built with Python and Tkinter.
+A modern desktop calculator with advanced features for area, volume, and electricity calculations, built with Python and Tkinter.
 
 ---
 
@@ -9,13 +12,15 @@ A modern desktop calculator with advanced features for area and volume calculati
 * 🔢 **Standard Calculator** – Basic arithmetic with real-time computation
 * 📐 **Area Calculations** – Square, rectangle, circle, triangle, trapezoid, cylinder, sphere, cone
 * 📦 **Volume Calculations** – Cube, rectangular prism, cylinder, cone, sphere, tetrahedron, trapezoidal prism
+* ⚡ **Electricity Calculations** – Voltage, current, resistance, and power with various formulas, plus a color band resistance calculator.
 * 🌙 **Dark Mode** – Toggle between light and dark themes
 * 🌍 **Multi-Language Support** – German (DE) and English (EN)
-* 📏 **Unit System** – Support for mm, cm, m, km with automatic conversion
+* 📏 **Unit System** – Support for pm, nm, μm, mm, cm, dm, m, km, Mm, Gm with automatic conversion
 * 🔄 **Adjustable Rounding** – Configure decimal places (0–20)
 * 🕓 **Calculation History** – Track last 3 calculations with SQLite storage
 * ⚙️ **Persistent Settings** – All preferences saved automatically
 * ⌨️ **Keyboard Support** – Full keyboard shortcuts for calculator operations
+* 🔄 **Automatic Updates** – Notifies you when a new version is available.
 
 ---
 
@@ -48,6 +53,14 @@ A modern desktop calculator with advanced features for area and volume calculati
 5. Select your units
 6. Results update automatically
 
+### Electricity Calculations
+1. Open **Shapes** menu
+2. Select **Electricity**
+3. Choose the quantity to calculate (e.g., Voltage, Current)
+4. Select the formula you want to use (e.g., U = I · R)
+5. Enter your values
+6. Results update automatically
+
 ### Settings
 - Toggle dark mode
 - Enable/disable rounding
@@ -71,7 +84,7 @@ A modern desktop calculator with advanced features for area and volume calculati
 * **OS**: Windows 7 or later
 * **RAM**: 50 MB minimum
 * **Disk Space**: 10 MB
-* **Internet**: Required for initial download only
+* **Internet**: Required for initial download and update checks
 
 ---
 
@@ -95,26 +108,24 @@ A modern desktop calculator with advanced features for area and volume calculati
 2. Find **Survivalcalc**
 3. Click **Uninstall**
 
-Or run **Survivalcalc_Uninstaller.exe** directly.
-
 ---
 
 ## 📬 Support
 
-* 🌐 **Website**: [Github](https://survivalful.de/survivalcalc/)
+* 🌐 **Website**: [https://Survivalful.de](https://survivalful.de)
 * 📧 **Email**: [team@survivalful.de](mailto:team@survivalful.de)
 
 ---
 
 ## 📜 License
 
-MIT License © 2026 Survivalful
+GPL License © 2026 Survivalful
 
 ---
 
 ## 📊 Version Info
 
-* **Version**: 1.0.0
+* **Version**: 1.0.2
 * **Release**: 24.03.2026
 * **Status**: Stable