Question

假设我的表格没有BORDER，我会将图片设为自定义标题栏

我想创建调用TitleBar的类，有一个方法ApplyTitleBar（Control c）; 在项目的任何Form中，只需将ApllyTitleBar（）调用到Form上的任何Control，当鼠标向下移动并移动鼠标时，Form也会移动。

TitleBar类中的代码：

public class TitleBar
{
    private bool drag = false; // determine if we should be moving the form
    private Point startPoint = new Point(0, 0);

    public void ApplyTitleBar(Control c)
    {
        c.MouseUp += new MouseEventHandler(panelTitleBar_MouseUp);
        c.MouseMove += new MouseEventHandler(panelTitleBar_MouseMove);
        c.MouseDown += new MouseEventHandler(panelTitleBar_MouseDown);

    }

    void panelTitleBar_MouseUp(object sender, MouseEventArgs e)
    {
        this.drag = false;
    }
    void panelTitleBar_MouseDown(object sender, MouseEventArgs e)
    {
        this.startPoint = e.Location;
        this.drag = true;
    }
    void panelTitleBar_MouseMove(object sender, MouseEventArgs e)
    {
        if (this.drag)
        { // if we should be dragging it, we need to figure out some movement
            Point p1 = new Point(e.X, e.Y);
            Point p2 = this.PointToScreen(p1);
            Point p3 = new Point(p2.X - this.startPoint.X,
                                 p2.Y - this.startPoint.Y);
            this.Location = p3;
        }
    }


}

假设在另一个表单中，我有标签lblTitleBar并希望它将是“titleBar”

TitleBar tb=new TitleBar();
tb.Apply(lblTitleBar);

我知道TitleBar类中的“this”参数不能有方法Location（）和PointToScreen（），因为“this”是TitleBar的实例，而不是Form的实例。是否有另一种方法可以将类传递给它，或者是这样做的方式???

tb.Apply(lblTitleBar,this);

Answer 1

我认为您在此之后的内容是对表格的引用：

public class TitleBar
{
    private bool drag = false; // determine if we should be moving the form
    private Point startPoint = new Point(0, 0);
    private Form form;

    public void ApplyTitleBar(Control c, Form f)
    {
        c.MouseUp += new MouseEventHandler(panelTitleBar_MouseUp);
        c.MouseMove += new MouseEventHandler(panelTitleBar_MouseMove);
        c.MouseDown += new MouseEventHandler(panelTitleBar_MouseDown);
        this.form = f;

    }
    ....

然后你可以这样做：

void panelTitleBar_MouseMove(object sender, MouseEventArgs e)
{
    if (this.drag)
    { // if we should be dragging it, we need to figure out some movement
        Point p1 = new Point(e.X, e.Y);
        Point p2 = form.PointToScreen(p1);
        Point p3 = new Point(p2.X - form.startPoint.X,
                             p2.Y - form.startPoint.Y);
        form.Location = p3;
    }
}

并且，假设您从表单中实例化所有这些，您确实会这样称呼它：

tb.ApplyTitleBar(lblTitleBar,this);

Answer 2

您可以尝试检索包含目标控件的表单。

void panelTitleBar_MouseMove(object sender, MouseEventArgs e)
{
    Control control = sender as Control;
    if(null != control)
    {
        Form form = control.FindForm();
        if(null != form)
        {
            if (this.drag)
            { // if we should be dragging it, we need to figure out some movement
                Point p1 = new Point(e.X, e.Y);
                Point p2 = form.PointToScreen(p1);
                Point p3 = new Point(p2.X - this.startPoint.X,
                                     p2.Y - this.startPoint.Y);
                form.Location = p3;
            }
        }
    }
}

将“this”参数传递给另一个类

2 个答案: