c# - 表单大小更改时如何自动缩放子控件的字体大小？

Question

我正在使用 TableLayoutPanel 来包含我希望在调整表单大小时自动调整大小的控件。我想知道当表单本身被调整大小时，如何使表单的子控件的大小与表单成比例？尽管 TableLayoutPanel 会自动调整所包含控件的大小，但这些控件保持相同的字体大小。

Answer 1

这是迄今为止我想出的最好的方法。我使用两个比例因子，并遍历所有控件以选择性地选择要缩放的那些：

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

namespace TestTableLayoutPanel
{
    public partial class Form2 : Form
    {
        private const float LARGER_FONT_FACTOR = 1.5f;
        private const float SMALLER_FONT_FACTOR = 0.8f;

        private int _lastFormSize;

        public Form2()
        {
            InitializeComponent();

            this.Resize += new EventHandler(Form2_Resize);
            _lastFormSize = GetFormArea(this.Size);
        }

        private int GetFormArea(Size size)
        {
            return size.Height * size.Width;
        }

        private void Form2_Resize(object sender, EventArgs e)
        {

            var bigger = GetFormArea(this.Size) > _lastFormSize;
            float scaleFactor = bigger ? LARGER_FONT_FACTOR : SMALLER_FONT_FACTOR;

            ResizeFont(this.Controls, scaleFactor);

            _lastFormSize = GetFormArea(this.Size);

        }

        private void ResizeFont(Control.ControlCollection coll, float scaleFactor)
        {
            foreach (Control c in coll)
            {
                if (c.HasChildren)
                {
                    ResizeFont(c.Controls, scaleFactor);
                }
                else
                {
                    //if (c.GetType().ToString() == "System.Windows.Form.Label")
                    if (true)
                    {
                        // scale font
                        c.Font = new Font(c.Font.FontFamily.Name, c.Font.Size * scaleFactor);
                    }
                }
            }
        }
    }
}

Answer 2

根据之前的答案，我写了一个真正的字体比例解决方案。

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

namespace MachineControlsTest
{
    public partial class Form2 : Form
    {

        private int _lastFormSize;

        public Form2()
        {
            InitializeComponent();

            this.Resize += new EventHandler(Form2_Resize);
            _lastFormSize = GetFormArea(this.Size);
        }

        private int GetFormArea(Size size)
        {
            return size.Height * size.Width;
        }

        private void Form2_Resize(object sender, EventArgs e)
        {
            Control control = (Control)sender;

            float scaleFactor = (float)GetFormArea(control.Size) / (float)_lastFormSize;

            ResizeFont(this.Controls, scaleFactor);

            _lastFormSize = GetFormArea(control.Size);

        }

        private void ResizeFont(Control.ControlCollection coll, float scaleFactor)
        {
            foreach (Control c in coll)
            {
                if (c.HasChildren)
                {
                    ResizeFont(c.Controls, scaleFactor);
                }
                else
                {
                    //if (c.GetType().ToString() == "System.Windows.Form.Label")
                    if (true)
                    {
                        // scale font
                        c.Font = new Font(c.Font.FontFamily.Name, c.Font.Size * scaleFactor);
                    }
                }
            }
        }
    }
}