Evil_Calculator/Evil Calculator/CalculatorBody.cs

namespace Lunar.Evil_Calculator
{
    public partial class CalculatorBody : Form
    {
        private bool mouseDown;
        private bool onTop;
        private Point lastLocation;
        private static Color LunarGray = System.Drawing.ColorTranslator.FromHtml("#2b292d");
        private static Color LunarOrange = System.Drawing.ColorTranslator.FromHtml("#ff8700");

        private Form CalculatorPanel = new Form();
        private EquationManager equationManager = new EquationManager();


        public CalculatorBody()
        {
            InitializeComponent();
            this.BackColor = LunarGray;
            this.Opacity = 0.75;
            this.FormBorderStyle = FormBorderStyle.None;
            this.ClientSize = new Size(300, 500);
            this.Text = "Calculator";
            MyTitleBar();
        }

        protected override void OnShown(EventArgs e)
        {
            base.OnShown(e);
            CalculatorPanelInit();
        }

        protected override void OnMove(EventArgs e)
        {
            base.OnMove(e);
            if (OwnedForms.Length > 0)
            {
                var p = PointToScreen(new Point(0, 30));
                var dx = p.X - OwnedForms[0].Location.X;
                var dy = p.Y - OwnedForms[0].Location.Y;
                foreach (var f in OwnedForms)
                    f.Location = new Point(f.Location.X + dx, f.Location.Y + dy);
            }
        }

        private void MyTitleBar()
        {
            Panel TitleBar = new Panel
            {
                Height = 30,
                Dock = DockStyle.Top,
                Visible = true
            };

            TitleBar.MouseDown += TitleBar_MouseDown;
            TitleBar.MouseMove += TitleBar_MouseMove;
            TitleBar.MouseUp += TitleBar_MouseUp;
            this.Controls.Add(TitleBar);

            Button ButtonMinimize = new Button
            {
                Text = "_",
                Width = 40,
                Height = TitleBar.Height,
                Dock = DockStyle.Right,
                FlatStyle = FlatStyle.Flat,
                ForeColor = Color.White
            };
            ButtonMinimize.FlatAppearance.BorderSize = 0;
            ButtonMinimize.FlatAppearance.BorderColor = LunarGray;
            ButtonMinimize.Click += (s, e) => this.WindowState = FormWindowState.Minimized;
            TitleBar.Controls.Add(ButtonMinimize);

            Button ButtonMaximize = new Button
            {
                Text = "□",
                Width = 40,
                Height = TitleBar.Height,
                Dock = DockStyle.Right,
                FlatStyle = FlatStyle.Flat,
                ForeColor = Color.White
            };
            ButtonMaximize.FlatAppearance.BorderSize = 0;
            ButtonMaximize.FlatAppearance.BorderColor = LunarGray;
            ButtonMaximize.Click += (s, e) =>
            {
                this.WindowState = (this.WindowState == FormWindowState.Normal) ? FormWindowState.Maximized : FormWindowState.Normal;
            };
            TitleBar.Controls.Add(ButtonMaximize);

            Button ButtonClose = new Button
            {
                Text = "X",
                Width = 40,
                Height = TitleBar.Height,
                Dock = DockStyle.Right,
                FlatStyle = FlatStyle.Flat,
                ForeColor = Color.White
            };
            ButtonClose.FlatAppearance.BorderSize = 0;
            ButtonClose.FlatAppearance.BorderColor = LunarGray;
            ButtonClose.Click += (s, e) => this.Close();
            TitleBar.Controls.Add(ButtonClose);

            Label titleLabel = new Label
            {
                Text = this.Text,
                Location = new Point(8, 7),
                AutoSize = true,
                ForeColor = Color.White
            };
            TitleBar.Controls.Add(titleLabel);

            void TitleBar_MouseDown(object? sender, MouseEventArgs e)
            {
                mouseDown = true;
                lastLocation = e.Location;
            }

            void TitleBar_MouseMove(object? sender, MouseEventArgs e)
            {
                if (mouseDown)
                {
                    this.Location = new Point(
                        (this.Location.X - lastLocation.X) + e.X, (this.Location.Y - lastLocation.Y) + e.Y);

                    this.Update();
                }
            }

            void TitleBar_MouseUp(object? sender, MouseEventArgs e)
            {
                mouseDown = false;
            }

            void Titlebar_BaseTextChanged(object? sender, EventArgs e)
            {
                titleLabel.Text = this.Text;
            }
            this.TextChanged += Titlebar_BaseTextChanged;
        }

        private void CalculatorPanelInit()
        {
            CalculatorPanel.FormBorderStyle = FormBorderStyle.None;
            CalculatorPanel.BackColor = Color.Gray;
            CalculatorPanel.TransparencyKey = CalculatorPanel.BackColor;
            CalculatorPanel.Opacity = 0.90;
            CalculatorPanel.StartPosition = FormStartPosition.Manual;
            CalculatorPanel.DesktopLocation = new Point(this.Location.X, this.Location.Y + 30);
            CalculatorPanel.ClientSize = new Size(this.Size.Width, this.Size.Height - 30);
            CalculatorPanel.Owner = this;
            CalculatorPanel.ShowInTaskbar = false;

            CalculatorButton buttonZero = new CalculatorButton("0", new Point(90, 410), CalculatorPanel, equationManager);
            CalculatorButton buttonOne = new CalculatorButton("1", new Point(20, 360), CalculatorPanel, equationManager);
            CalculatorButton buttonTwo = new CalculatorButton("2", new Point(90, 360), CalculatorPanel, equationManager);
            CalculatorButton buttonThree = new CalculatorButton("3", new Point(160, 360), CalculatorPanel, equationManager);
            CalculatorButton buttonFour = new CalculatorButton("4", new Point(20, 310), CalculatorPanel, equationManager);
            CalculatorButton buttonFive = new CalculatorButton("5", new Point(90, 310), CalculatorPanel, equationManager);
            CalculatorButton buttonSix = new CalculatorButton("6", new Point(160, 310), CalculatorPanel, equationManager);
            CalculatorButton buttonSeven = new CalculatorButton("7", new Point(20, 260), CalculatorPanel, equationManager);
            CalculatorButton buttonEight = new CalculatorButton("8", new Point(90, 260), CalculatorPanel, equationManager);
            CalculatorButton buttonNine = new CalculatorButton("9", new Point(160, 260), CalculatorPanel, equationManager);


            CalculatorButton buttonLeftBracket = new CalculatorButton("(", new Point(160, 160), CalculatorPanel, equationManager);
            CalculatorButton buttonRightBracket = new CalculatorButton(")", new Point(230, 160), CalculatorPanel, equationManager);

            CalculatorButton buttonClear = new CalculatorButton("C", new Point(20, 160), CalculatorPanel, equationManager);
            CalculatorButton buttonClearEverything = new CalculatorButton("CE", new Point(90, 160), CalculatorPanel, equationManager);

            CalculatorButton buttonPowerX = new CalculatorButton("xˣ", new Point(20, 210), CalculatorPanel, equationManager);
            CalculatorButton buttonPowerTwo = new CalculatorButton("x²", new Point(90, 210), CalculatorPanel, equationManager);
            CalculatorButton buttonSquareRoot = new CalculatorButton("√", new Point(160, 210), CalculatorPanel, equationManager);
            CalculatorButton buttonDivide = new CalculatorButton("/", new Point(230, 210), CalculatorPanel, equationManager);
            CalculatorButton buttonMultiply = new CalculatorButton("*", new Point(230, 260), CalculatorPanel, equationManager);
            CalculatorButton buttonMinus = new CalculatorButton("-", new Point(230, 310), CalculatorPanel, equationManager);
            CalculatorButton buttonPlus = new CalculatorButton("+", new Point(230, 360), CalculatorPanel, equationManager);
            CalculatorButton buttonComma = new CalculatorButton(",", new Point(160, 410), CalculatorPanel, equationManager);

            EqualsButton equalsButton = new EqualsButton(new Point(230, 410), CalculatorPanel, equationManager);

            ToggleTopButton toggleTopButton = new ToggleTopButton(new Point(20, 410), CalculatorPanel);
            toggleTopButton.Click += ToggleTopButton_Click;

            Label equationTextBox = new Label();
            equationTextBox.Location = new Point(20, 20);
            equationTextBox.ClientSize = new Size(260, 80);
            equationTextBox.TextAlign = ContentAlignment.TopRight;
            equationTextBox.Font = new Font("Arial", 16);
            equationTextBox.ForeColor = Color.White;
            CalculatorPanel.Controls.Add(equationTextBox);

            Label currentOperandTextBox = new Label();
            currentOperandTextBox.Text = "0";
            currentOperandTextBox.Location = new Point(20, 100);
            currentOperandTextBox.ClientSize = new Size(260, 30);
            currentOperandTextBox.TextAlign = ContentAlignment.TopRight;
            currentOperandTextBox.Font = new Font("Arial", 20);
            currentOperandTextBox.ForeColor = Color.White;
            CalculatorPanel.Controls.Add(currentOperandTextBox);

            equationManager.AcquireOutputLabels(ref equationTextBox, ref currentOperandTextBox);

            CalculatorPanel.Show();

            void ToggleTopButton_Click(object? sender, EventArgs e)
            {
                this.Text = this.onTop ? "Calculator" : "Calculator [pinned]";
                this.onTop = !this.onTop;
                this.TopMost = !this.TopMost;
                CalculatorPanel.TopMost = !CalculatorPanel.TopMost;
            }


        }

        private class CalculatorButton : Button
        {
            public CalculatorButton(string Text, Point Location, Form Panel, EquationManager equationManager)
            {
                this.Text = Text;
                this.Font = new Font("Arial", 12);
                this.Location = Location;
                this.Width = 50;
                this.Height = 40;
                this.FlatStyle = FlatStyle.Flat;
                this.BackColor = LunarGray;
                this.FlatAppearance.BorderSize = 0;
                this.FlatAppearance.BorderColor = LunarGray;
                ForeColor = Color.White;
                this.Click += equationManager.ProcessButtonInput;
                Panel.Controls.Add(this);
            }
        }

        private class EqualsButton : Button
        {
            public EqualsButton(Point Location, Form Panel, EquationManager equationManager)
            {
                this.Text = "=";
                this.Font = new Font("Arial", 12);
                this.Location = Location;
                this.Width = 50;
                this.Height = 40;
                this.FlatStyle = FlatStyle.Flat;
                this.BackColor = LunarOrange;
                this.FlatAppearance.BorderSize = 0;
                this.FlatAppearance.BorderColor = LunarOrange;
                ForeColor = Color.White;
                this.Click += equationManager.EqualsButtonPressed;
                Panel.Controls.Add(this);
            }
        }

        private class ToggleTopButton : Button
        {
            public ToggleTopButton(Point Location, Form Panel)
            {
                this.Text = "Toggle\ntop";
                this.Font = new Font("Arial", 7);
                this.Location = Location;
                this.Width = 50;
                this.Height = 40;
                this.FlatStyle = FlatStyle.Flat;
                this.BackColor = LunarGray;
                this.FlatAppearance.BorderSize = 0;
                this.FlatAppearance.BorderColor = LunarGray;
                ForeColor = Color.White;
                Panel.Controls.Add(this);
            }
        }
    }
}