114 lines
3.2 KiB
C#
114 lines
3.2 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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public partial class Form1 : Form
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{
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private PropertyGrid propertyGrid;
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private TextBox customTextBox;
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private string targetProperty = "Formula";
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public Form1()
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{
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//InitializeComponent();
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propertyGrid = new PropertyGrid
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{
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Dock = DockStyle.Fill,
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SelectedObject = new FormulaSettings()
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};
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propertyGrid.SelectedGridItemChanged += PropertyGrid_SelectedGridItemChanged;
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Controls.Add(propertyGrid);
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// Hidden TextBox that will overlay the editing cell
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customTextBox = new TextBox
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{
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Visible = false,
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BorderStyle = BorderStyle.FixedSingle
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};
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customTextBox.KeyDown += CustomTextBox_KeyDown;
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Controls.Add(customTextBox);
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customTextBox.BringToFront();
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}
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private void PropertyGrid_SelectedGridItemChanged(object sender, SelectedGridItemChangedEventArgs e)
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{
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HideCustomTextBox();
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if (e.NewSelection?.Label == targetProperty)
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{
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// Delay to allow PropertyGrid to focus its internal editor first
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BeginInvoke((MethodInvoker)(() =>
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{
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ShowCustomTextBoxForSelectedProperty();
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}));
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}
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}
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private void ShowCustomTextBoxForSelectedProperty()
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{
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Rectangle rect = GetPropertyGridItemRectangle(propertyGrid, targetProperty);
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if (rect != Rectangle.Empty)
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{
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customTextBox.Bounds = rect;
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customTextBox.Text = GetPropertyValue(targetProperty);
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customTextBox.Visible = true;
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customTextBox.Focus();
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customTextBox.Select(customTextBox.Text.Length, 0);
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}
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}
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private void HideCustomTextBox()
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{
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if (customTextBox.Visible)
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{
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SetPropertyValue(targetProperty, customTextBox.Text);
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customTextBox.Visible = false;
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}
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}
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private string GetPropertyValue(string propName)
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{
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var prop = propertyGrid.SelectedObject.GetType().GetProperty(propName);
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return prop?.GetValue(propertyGrid.SelectedObject)?.ToString();
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}
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private void SetPropertyValue(string propName, string value)
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{
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var prop = propertyGrid.SelectedObject.GetType().GetProperty(propName);
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prop?.SetValue(propertyGrid.SelectedObject, value);
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propertyGrid.Refresh();
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}
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private void CustomTextBox_KeyDown(object sender, KeyEventArgs e)
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{
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if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Escape)
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{
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HideCustomTextBox();
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e.Handled = true;
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}
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}
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private Rectangle GetPropertyGridItemRectangle(PropertyGrid grid, string label)
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{
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// Use reflection to get internal gridView and find bounds
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var gridView = grid.Controls[1]; // usually internal GridView
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foreach (Control c in gridView.Controls)
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{
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if (c is TextBox && c.Visible)
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{
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return c.Bounds;
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}
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}
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return Rectangle.Empty;
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}
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}
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public class FormulaSettings
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{
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[Category("Equation")]
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public string Formula { get; set; } = "sin(x) + log(x)";
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}
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