Demo/ToolStripSpringTextBox.cs

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace Demo
{
    public class ToolStripSpringTextBox : ToolStripTextBox
    {
        public override Size GetPreferredSize(Size constrainingSize)
        {
            // Use the default size if the text box is on the overflow menu
            // or is on a vertical ToolStrip.
            if (IsOnOverflow || Owner.Orientation == Orientation.Vertical)
            {
                return DefaultSize;
            }

            // Declare a variable to store the total available width as 
            // it is calculated, starting with the display width of the 
            // owning ToolStrip.
            Int32 width = Owner.DisplayRectangle.Width;

            // Subtract the width of the overflow button if it is displayed. 
            if (Owner.OverflowButton.Visible)
            {
                width = width - Owner.OverflowButton.Width -
                    Owner.OverflowButton.Margin.Horizontal;
            }

            // Declare a variable to maintain a count of ToolStripSpringTextBox 
            // items currently displayed in the owning ToolStrip. 
            Int32 springBoxCount = 0;

            foreach (ToolStripItem item in Owner.Items)
            {
                // Ignore items on the overflow menu.
                if (item.IsOnOverflow) continue;

                if (item is ToolStripSpringTextBox)
                {
                    // For ToolStripSpringTextBox items, increment the count and 
                    // subtract the margin width from the total available width.
                    springBoxCount++;
                    width -= item.Margin.Horizontal;
                }
                else
                {
                    // For all other items, subtract the full width from the total
                    // available width.
                    width = width - item.Width - item.Margin.Horizontal;
                }
            }

            // If there are multiple ToolStripSpringTextBox items in the owning
            // ToolStrip, divide the total available width between them. 
            if (springBoxCount > 1) width /= springBoxCount;