c# – 如何在WinForm的控件设计器中使用鼠标按比例调整控件的大

public class Panelx : Panel {

    private int _width;
    private int _height;
    private double _proportion;
    private bool _changingSize;

    [DefaultValue(false)]
    public bool MaintainRatio { get; set; }

    public Panelx() {
        MaintainRatio = false;
        _width = this.Width;
        _height = this.Height;
        _proportion = (double)_height / (double)_width;
        _changingSize = false;
    }

    protected override void OnResize(EventArgs eventargs) {
        if (MaintainRatio == true) {
            if (_changingSize == false) {
                _changingSize = true;
                try {
                    if (this.Width != _width) {
                        this.Height = (int)(this.Width * _proportion);
                        _width = this.Width;
                    };
                    if (this.Height != _height) {
                        this.Width = (int)(this.Height / _proportion);
                        _height = this.Height;
                    };
                }
                finally {
                    _changingSize = false;
                }
            }
        }
        base.OnResize(eventargs);
    }

}

然后,您需要做的就是将MaintainRatio属性设置为’true’以使其适当调整大小.

但是,如果您需要它来处理许多不同的控件,这个解决方案可能会非常艰巨.