滚动面板时固定十个分量的控制地位 [英] Mantain a control position fixed when scrolling a panel

问题描述

我有一个大的自定义面板的是Panel2 的是滚动在父面板的 PANEL1 的左边中间一个标签的卷标1 的。

我的保持的卷标1 的始终是是Panel2的可见光左中间，滚动时也是如此。

在真实的例子，我的面板是用户控件的生成的在其左侧的一些标签。该小组卷轴，但我需要保持标签总是可见的。

怎么可能实现？

这是我的code：

 公共部分类Form1中：形态
{
    公共Form1中（）
    {
        this.InitializeComponent（）;
    }

    保护点clickPosition;
    保护点的scrollPosition;

    私人无效panel2_MouseDown（对象发件人，发送MouseEventArgs E）
    {
        this.clickPosition = e.Location;
    }

    私人无效panel2_MouseMove（对象发件人，发送MouseEventArgs E）
    {
        如果（e.Button == MouseButtons.Left）
        {
            this.SuspendLayout（）;
            this.scrollPosition + =（尺寸）clickPosition  - （尺寸）e.Location;
            this.panel1.AutoScrollPosition =则scrollPosition;
            this.ResumeLayout（假）;
        }
    }
}
 

解决方案

 公共Form1中（）
    {
        this.InitializeComponent（）;
        panel2.Paint + =新PaintEventHandler（panel2_Paint）;
    }

    无效panel2_Paint（对象发件人，PaintEventArgs的E）
    {
        label1.Location =
            新点（-panel1.AutoScrollPosition.X，label1.Location.Y）;
    }
 

I have a label label1 in the middle left of a large custom panel panel2 that is scrolled in a parent panel panel1.

I would keep the label1 always in the visible left middle of the panel2, even when scrolling.

In the real example, my panel is a user control that generates the some labels in its left side. The panel scrolls, but I need to keep the labels always visible.

How could it be achieved?

this is my code:

public partial class Form1 : Form
{
    public Form1()
    {
        this.InitializeComponent();
    }

    protected Point clickPosition;
    protected Point scrollPosition;

    private void panel2_MouseDown(object sender, MouseEventArgs e)
    {
        this.clickPosition = e.Location;
    }

    private void panel2_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            this.SuspendLayout();
            this.scrollPosition += (Size)clickPosition - (Size)e.Location;
            this.panel1.AutoScrollPosition = scrollPosition;
            this.ResumeLayout(false);
        }
    }
}

解决方案

    public Form1()
    {
        this.InitializeComponent();
        panel2.Paint += new PaintEventHandler(panel2_Paint);
    }

    void panel2_Paint(object sender, PaintEventArgs e)
    {
        label1.Location = 
            new Point(-panel1.AutoScrollPosition.X, label1.Location.Y);
    }

这篇关于滚动面板时固定十个分量的控制地位的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！