CustomControl/ScrollFlowLayoutPanel.cs

（完整代码） 997B 

using System;
using System.Windows.Forms;

namespace AppManager.CustomControl {
    ///
    /// 支持滚轮的FlowLayoutPanel.
    ///
    internal class ScrollFlowLayoutPanel : FlowLayoutPanel {

        protected override void OnMouseClick(MouseEventArgs e) {
            base.OnMouseClick(e);
        }


        protected override void OnMouseEnter(EventArgs e) {
            base.OnMouseEnter(e);
        }

        protected override void OnMouseWheel(MouseEventArgs e) {
            if (e.Delta < 0) {
                if (this.VerticalScroll.Maximum > this.VerticalScroll.Value + 50)
                    this.VerticalScroll.Value += 50;
                else
                    this.VerticalScroll.Value = this.VerticalScroll.Maximum;
            } else {
                if (this.VerticalScroll.Value > 50)
                    this.VerticalScroll.Value -= 50;
                else {
                    this.VerticalScroll.Value = 0;
                }
            }

        }
    }
}

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