使用组合框更改画笔颜色

本文关键字：画笔 颜色 组合 | 更新日期: 2023-09-27 18:30:40

我需要comboBox索引来更改画笔/笔在选择时的颜色，我知道这应该是一个简单的修复，但我似乎无法理解。

public partial class Form1 : Form
{
    private bool penDown = false;
    private int radius = 5;
    private SolidBrush brush = new SolidBrush(Color.IndianRed);
    private Color[] colors = { Color.IndianRed, Color.Blue, Color.Green, Color.Yellow, Color.Purple};
    public Form1()
    {
        InitializeComponent();
    }
    private void btnClr_Click(object sender, EventArgs e)
    {
        Graphics g = panel1.CreateGraphics();
        g.Clear(panel1.BackColor);
        g.DrawImage(panel1.BackgroundImage, panel1.ClientRectangle, 0, 0, panel1.BackgroundImage.Width,
            panel1.BackgroundImage.Height, GraphicsUnit.Pixel);
        g.Dispose();
    }
    private void btnQuit_Click(object sender, EventArgs e)
    {
        base.Close();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
    }
    private void panel1_MouseMove(object sender, MouseEventArgs e)
    {
        if (!penDown)
        {
            return;
        }
        Graphics g = panel1.CreateGraphics();
        g.FillEllipse(brush, new Rectangle(e.X - radius, e.Y - radius, 2 * radius, 2 * radius));
        g.Dispose();
    }
    private void panel1_MouseDown(object sender, MouseEventArgs e)
    {
        penDown = true;
    }
    private void panel1_MouseUp(object sender, MouseEventArgs e)
    {
        penDown = false;
    }
    private void colorCB_SelectedIndexChanged(object sender, EventArgs e)
    {
        //int i = ((color
    }
}

使用组合框更改画笔颜色

只需使用组合框SelectedIndex属性从colors数组中检索颜色：

private void colorCB_SelectedIndexChanged(object sender, EventArgs e)
{
    brush = new SolidBrush(colors[colorCB.SelectedIndex]);
}
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