Question

如果已经提出要求，我会事先道歉。搜索stackoverflow和互联网并没有提供任何有用的例子。

在正在运行的程序中，我有一个图片框，我需要能够从一个GroupBox单击并拖动到另一个GroupBox。我知道如何在WinForm本身周围拖动图片框（即没有涉及任何GroupBox）。我找不到任何如何做到这一点的例子。

我为组合框/鼠标交互相关的每个事件创建了代码（请参阅代码的结尾）。

注意：感谢您对需要代码的反馈。我是新的Stack Overflow。

INTERFACE： Initial Interface

问题：当我在组框上单击并拖动pbxMoveIt时，组框事件永远不会根据状态标签中的文本触发。

Dragging image over group box doesn't trigger group box enter, hover or other events

当我在不拖动任何内容的情况下移动鼠标时，组框鼠标悬停事件将触发。

Group box mouse hover event fires when not dragging anything.

ADDED代码：

namespace MoveControlsOnFormBetweenGroupBoxes {
    public partial class frmMain : Form {

        private Point m_MouseDownLocation;
        private bool m_IsDragging;

        public frmMain ( ) {
            InitializeComponent ( );

            pbxMoveIt.BringToFront ( );
            gbx1.AllowDrop = true;
            gbx2.AllowDrop = true;
            lblStatus.Text = "GUI Status: Started";
        }

        #region Picture Box Related Methods
        // Picture Related Methods
        private void pbxMoveIt_MouseDown ( object sender, MouseEventArgs e ) {
            lblStatus.Text = "GUI Status: pbxMoveIt - MouseDown";
            if ( e.Button == MouseButtons.Left ) {
                m_MouseDownLocation = e.Location;
                m_IsDragging = true;
            }
        }
        private void pbxMoveIt_MouseMove ( object sender, MouseEventArgs e ) {
            int newX;
            int newY;
            int minX = 10;
            int minY = 10;
            int maxX = this.Width - (25 + pbxMoveIt.Width);
            int maxY = this.Height - (45 + pbxMoveIt.Height);
            if ( e.Button == MouseButtons.Left ) {
                lblStatus.Text = "GUI Status: pbxMoveIt - MouseMove";
                newX = e.X + pbxMoveIt.Left - m_MouseDownLocation.X;
                newY = e.Y + pbxMoveIt.Top - m_MouseDownLocation.Y;
                if ( m_IsDragging ) {
                    if ( ( newX >= minX ) && ( newX <= maxX ) ) {
                        pbxMoveIt.Left = newX;
                    }
                    if ( ( newY >= minY ) && ( newY <= maxY ) ) {
                        pbxMoveIt.Top = newY;
                    }
                }
            }
        }
        private void pbxMoveIt_MouseUp ( object sender, MouseEventArgs e ) {
            lblStatus.Text = "GUI Status: pbxMoveIt - MouseUp";
            if ( e.Button == System.Windows.Forms.MouseButtons.Left ) {
                m_IsDragging = false;
            }
        }
        #endregion

        #region Group Box Related
        // Group Box Related Methods
        private string Gbx_Title ( object sender ) {
            string boxTitle = "Unknown";
            if ( sender == gbx1 ) {
                boxTitle = "Group Box 1";
            }
            if ( sender == gbx2 ) {
                boxTitle = "Group Box 2";
            }
            return boxTitle;
        }
        private void gbx_DragDrop ( object sender, DragEventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - DragDrop", Gbx_Title ( sender ) );
        }
        private void gbx_DragEnter ( object sender, DragEventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - DragEnter", Gbx_Title ( sender ) );
        }
        private void gbx_DragLeave ( object sender, EventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - DragLeave", Gbx_Title ( sender ) );
        }

        private void gbx_DragOver ( object sender, DragEventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - DragOver", Gbx_Title ( sender ) );
        }

        private void gbx_Enter ( object sender, EventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - Enter", Gbx_Title ( sender ) );
        }

        private void gbx_Leave ( object sender, EventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - Leave", Gbx_Title ( sender ) );
        }

        private void gbx_MouseHover ( object sender, EventArgs e ) {
            lblStatus.Text = String.Format ( "GUI Status: {0} - MouseHover", Gbx_Title ( sender ) );
        }
        #endregion
    }
}

Answer 1

将我的课程添加到您的项目中

using System;
using System.Windows.Forms;

namespace Hector.Framework.Utils
{
    public class Drag : Form
    {
        private bool isDraggable;
        private Control target;
        private int a, b;

        public Drag(){}

        public void Grab(Control control)
        {
            try
            {
                this.isDraggable = true;
                this.target = control;
                this.a = Control.MousePosition.X - this.target.Left;
                this.b = Control.MousePosition.Y - this.target.Top;
            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        public void MoveObject(bool Horizontal = true, bool Vertical = true)
        {
            try
            {
                if (this.isDraggable)
                {
                    int x = Control.MousePosition.X,
                        y = Control.MousePosition.Y;

                    if (Horizontal)
                    {
                        this.target.Left = x - this.a;
                    }
                    if (Vertical)
                    {
                        this.target.Top = y - this.b;
                    }
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        public void Release()
        {
            this.isDraggable = false;
        }
    }
}

然后，调用PictureBox事件

    public partial class Form1 : Form
    {
    private Hector.Framework.Utils.Drag drag = new Hector.Framework.Utils.Drag();

    private void pictureBox_MouseDown(object sender, MouseEventArgs e)
    {
       drag.Grab(pictureBox);
    }

    private void pictureBox_MouseUp(object sender, MouseEventArgs e)
    {
       drag.Release();
    }

    private void pictureBox_MouseMove(object sender, MouseEventArgs e)
    {
       drag.MoveObject();
    }
    }

C＃WinForm - 将PictureBox从一个GroupBox拖放到另一个GroupBox

1 个答案: