c2flux/Chart_ResponsiveTableGrid.cs at master · UncleRiot/c2flux · GitHub

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using System;
using System.Drawing;
using System.Windows.Forms;


namespace c2flux
{
    // Responsive AntdUI table base: shared styling and percentage-based column sizing.
    // Done: AdvancedFeaturesForm.cs
    // Done: Chart_TableGridChart.cs
    // Todo: New Dialogs/functions -> route new responsive AntdUI tables through this class.
    // Reminder: Scrollbars, tables not moving/shrinking, when horiz windows-size gets smaler
    // Reminder: Parent-/Container-/Layoutproblem !!!
    public class Chart_ResponsiveTableGrid : DataGridView
    {
        private (string ColumnName, int Percentage)[] _responsiveColumns =
            Array.Empty<(string ColumnName, int Percentage)>();

        private bool _applyingColumnWidths;

        public Chart_ResponsiveTableGrid()
        {
            Dock = DockStyle.Fill;
            AutoSize = false;
            MinimumSize = Size.Empty;
            MaximumSize = Size.Empty;
            AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
            ScrollBars = ScrollBars.Vertical;
            BorderStyle = BorderStyle.FixedSingle;
            CellBorderStyle = DataGridViewCellBorderStyle.SingleHorizontal;

            ParentChanged += Chart_ResponsiveTableGrid_ParentChanged;
            DataBindingComplete += Chart_ResponsiveTableGrid_DataBindingComplete;
            ColumnAdded += Chart_ResponsiveTableGrid_ColumnAdded;
        }

        public void SetResponsiveColumns(
            params (string ColumnName, int Percentage)[] responsiveColumns)
        {
            _responsiveColumns = responsiveColumns ??
                Array.Empty<(string ColumnName, int Percentage)>();

            FitToCurrentBounds();
        }

        public void ApplyAntdUIStyle()
        {
            AntdThemeService.ApplyTable(this);
            FitToCurrentBounds();
        }

        private void Chart_ResponsiveTableGrid_ParentChanged(object sender, EventArgs e)
        {
            FitToCurrentBounds();
        }

        private void Chart_ResponsiveTableGrid_DataBindingComplete(
            object sender,
            DataGridViewBindingCompleteEventArgs e)
        {
            FitToCurrentBounds();
        }

        private void Chart_ResponsiveTableGrid_ColumnAdded(
            object sender,
            DataGridViewColumnEventArgs e)
        {
            e.Column.AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
            e.Column.MinimumWidth = 2;
            FitToCurrentBounds();
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);
            FitToCurrentBounds();
        }

        private void FitToCurrentBounds()
        {
            if (_applyingColumnWidths)
                return;

            Dock = DockStyle.Fill;
            AutoSize = false;
            MinimumSize = Size.Empty;
            MaximumSize = Size.Empty;
            AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
            ScrollBars = ScrollBars.Vertical;
            HorizontalScrollingOffset = 0;

            if (_responsiveColumns.Length == 0 || ClientSize.Width <= 0)
                return;

            int totalPercentage = 0;

            foreach ((string ColumnName, int Percentage) columnDefinition in _responsiveColumns)
            {
                if (!Columns.Contains(columnDefinition.ColumnName))
                    return;

                totalPercentage += Math.Max(0, columnDefinition.Percentage);
            }

            if (totalPercentage <= 0)
                return;

            int availableWidth =
                ClientSize.Width -
                SystemInformation.VerticalScrollBarWidth -
                2;

            availableWidth = Math.Max(
                availableWidth,
                _responsiveColumns.Length * 2);

            SuspendLayout();
            _applyingColumnWidths = true;

            try
            {
                int assignedWidth = 0;

                for (int index = 0; index < _responsiveColumns.Length; index++)
                {
                    (string ColumnName, int Percentage) definition =
                        _responsiveColumns[index];

                    DataGridViewColumn column = Columns[definition.ColumnName];
                    column.AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
                    column.MinimumWidth = 2;

                    int width = index == _responsiveColumns.Length - 1
                        ? availableWidth - assignedWidth
                        : availableWidth *
                            Math.Max(0, definition.Percentage) /
                            totalPercentage;

                    column.Width = Math.Max(2, width);
                    assignedWidth += column.Width;
                }
            }
            finally
            {
                _applyingColumnWidths = false;
                ResumeLayout();
            }

            Invalidate();
        }
    }
}