63 lines
2.5 KiB
C#
63 lines
2.5 KiB
C#
using DataLayer;
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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Linq;
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using System.Windows.Forms;
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namespace LibationWinForms.GridView
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{
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public class MyRatingGridViewColumn : DataGridViewColumn
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{
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public MyRatingGridViewColumn() : base(new MyRatingGridViewCell()) { }
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public override DataGridViewCell CellTemplate
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{
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get => base.CellTemplate;
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set
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{
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if (value is not MyRatingGridViewCell)
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throw new InvalidCastException($"Must be a {nameof(MyRatingGridViewCell)}");
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base.CellTemplate = value;
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}
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}
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}
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internal class MyRatingGridViewCell : DataGridViewTextBoxCell
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{
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private static Rating DefaultRating => new Rating(0, 0, 0);
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public override object DefaultNewRowValue => DefaultRating;
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public override Type EditType => typeof(MyRatingCellEditor);
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public override Type ValueType => typeof(Rating);
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public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
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{
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base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
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var ctl = DataGridView.EditingControl as MyRatingCellEditor;
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ctl.Rating = Value is Rating rating ? rating : DefaultRating;
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}
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protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
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{
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if (value is Rating rating)
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{
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ToolTipText = "Click to change ratings";
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var starString = rating.ToStarString();
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base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, starString, starString, errorText, cellStyle, advancedBorderStyle, paintParts);
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}
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else
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base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, string.Empty, string.Empty, errorText, cellStyle, advancedBorderStyle, paintParts);
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}
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protected override object GetFormattedValue(object value, int rowIndex, ref DataGridViewCellStyle cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context)
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=> value is Rating rating ? rating.ToStarString() : value?.ToString();
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public override object ParseFormattedValue(object formattedValue, DataGridViewCellStyle cellStyle, TypeConverter formattedValueTypeConverter, TypeConverter valueTypeConverter)
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=> formattedValue;
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}
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}
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