WinForm窗体的MouseDown事件和MouseMove事件的问题

松果工作室 2006-10-31 08:29:34

我在阅读“制作不规则窗体”的相关文章时，有以下两个问题弄不明白，请高手指点：
...
Private Point mouseOffSet;
private bool isMouseDown=false;
...
private void MainForm_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseOffset = new Point(-e.X, -e.Y);
isMouseDown = true;
}
}

private void MainForm_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (isMouseDown)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(mouseOffset.X, mouseOffset.Y);
this.Location = mousePos;
}
}

Q1:为什么要使用(-e.X, -e.Y),而不是直接用(e.X,e.Y)？
Q2：OffSet()方法是将鼠标平衡(x,y)个像素吗？

...全文

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flowersea312 2006-10-31

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明白了

lizhizhe2000 2006-10-31

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老大都说了，准没错！

zhangzengping 2006-10-31

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kkkkkkkkkkkkkkkkkkk!

我也是不明白为什么是 (-e)

Knight94 2006-10-31

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to Q1:为什么要使用(-e.X, -e.Y),而不是直接用(e.X,e.Y)？

这是窗体左上角相对于当前鼠标的偏移量

to Q2：OffSet()方法是将鼠标平衡(x,y)个像素吗？

计算窗体在当前鼠标位置下的左上角位置。

自定义窗体的最大化、最小化和关闭按钮, C#移动无标题栏窗体的三种代码： C#移动无标题栏窗体的三种代码：第一种采用，需注意窗体上的控件是否把窗体覆盖了。。。MouseDown、MouseMove、MouseUp事件应该是鼠标所处位置最顶层的控件的事件在窗体的类中声明两个变量 private Point mouseOffset; //记录鼠标指针的坐标 private bool isMouseDown = false; //记录鼠标按键是否按下创建该窗体 MouseDown、MouseMove、MouseUp事件的相应处理程序 private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { int xOffset; int yOffset; if (e.Button == MouseButtons.Left) { xOffset = -e.X ; yOffset = -e.Y ; mouseOffset = new Point(xOffset, yOffset); isMouseDown = true; } } private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) { if (isMouseDown) { Point mousePos = Control.MousePosition; mousePos.Offset(mouseOffset.X, mouseOffset.Y); Location = mousePos; } } private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e) { // 修改鼠标状态isMouseDown的值 // 确保只有鼠标左键按下并移动时，才移动窗体 if (e.Button == MouseButtons.Left) { isMouseDown = false; } } 第二种调用API 未验证 using System.Runtime.InteropServices; [DllImport("user32.dll")] public static extern bool ReleaseCapture(); [DllImport("user32.dll")] public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); public const int WM_SYSCOMMAND = 0x0112; public const int SC_MOVE = 0xF010; public const int HTCAPTION = 0x0002; private void Form1_MouseDown(object sender, MouseEventArgs e) { ReleaseCapture(); SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0); } 第三种未验证 private bool isMouseDown = false; private Point FormLocation; //form的location private Point mouseOffset; //鼠标的按下位置 [DllImport("user32.dll")] public static extern bool ReleaseCapture(); [DllImport("user32.dll")] public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); private const int WM_SYSCOMMAND = 0x0112;//点击窗口左上角那个图标时的系统信息 private const int SC_MOVE = 0xF010;//移动信息 private const int HTCAPTION = 0x0002;//表示鼠标在窗口标题栏时的系统信息 private const int WM_NCHITTEST = 0x84;//鼠标在窗体客户区（除了标题栏和边框以外的部分）时发送的消息 private const int HTCLIENT = 0x1;//表示鼠标在窗口客户区的系统消息 private const int SC_MAXIMIZE = 0xF030;//最大化信息 private const int SC_MINIMIZE = 0xF020;//最小化信息 protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_SYSCOMMAND: if (m.WParam == (IntPtr)SC_MAXIMIZE) { m.WParam = (IntPtr)SC_MINIMIZE; } break; case WM_NCHITTEST: //如果鼠标移动或单击 base.WndProc(ref m);//调用基类的窗口过程——WndProc方法处理这个消息 if (m.Result == (IntPtr)HTCLIENT)//如果返回的是HTCLIENT { m.Result = (IntPtr)HTCAPTION;//把它改为HTCAPTION return;//直接返回退出方法 } break; } base.WndProc(ref m);//如果不是鼠标移动或单击消息就调用基类的窗口过程进行处理 } private void Form1_Load(object sender, EventArgs e) { } ------------------------------- 如何在窗体标题栏左边的控制菜单加入自己的菜单啊？我们一般在窗口标题栏点右键或按Alt+空格可以弹出那个菜单。 ------解决方案-------------------- using System.Runtime.InteropServices; [DllImport( "user32.dll ")] public static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); [DllImport( "user32.dll ")] public static extern bool InsertMenu(IntPtr hMenu, uint uPosition, uint uFlags, uint uIDNewItem, string lpNewItem); public const int MF_BYCOMMAND = 0; public const int MF_STRING = 0; public const int MF_BYPOSITION = 0x400; public const int MF_SEPARATOR = 0x800; private const uint SC_ABOUT = 0x0001; public const int WM_SYSCOMMAND = 0x0112; private void Form1_Load(object sender, EventArgs e) { IntPtr vMenuHandle = GetSystemMenu(Handle, false); InsertMenu(vMenuHandle, 255, MF_STRING, SC_ABOUT, "About... "); } protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_SYSCOMMAND: if ((uint)m.WParam == SC_ABOUT) { MessageBox.Show( "Zswang 路过! "); } break; } base.WndProc(ref m); }

自定义winform 窗口标题栏主要代码 public partial class ZForm : Form { private bool moving = false; private Point oldMousePosition; public new FormBorderStyle FormBorderStyle { get { return base.FormBorderStyle; } set { if (value != FormBorderStyle.Sizable && value != FormBorderStyle.SizableToolWindow) { titlepanel.Controls.Remove(button2); } base.FormBorderStyle = value; } } #region 隐藏父类的属性，使其不可见 [Browsable(false)] public new string Text { get { return titlelabel.Text; } set { } } [Browsable(false)] public new bool ControlBox { get { return false; } set { base.ControlBox = false; } } #endregion [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [Description("窗体标题")] public string Title { get { return titlelabel.Text; } set { titlelabel.Text = value; } } [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [Description("窗体标题字体样式")] public Font TitleFont { get { return titlelabel.Font; } set { titlelabel.Font = value; } } [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [Description("窗体标题字体颜色")] public Color TitleColor { get { return titlelabel.ForeColor; } set { titlelabel.ForeColor = value; } } [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [Description("窗体标题栏背景色")] public Color TitleBarBackColor { get { return titlepanel.BackColor; } set { titlepanel.BackColor = value; } } public new bool MaximizeBox { get { return titlepanel.Contains(button2); } set { if (!value) { titlepanel.Controls.Remove(button2); } else if (!titlepanel.Contains(button2)) { titlepanel.Controls.Add(button2); } } } public new bool MinimizeBox { get { return titlepanel.Contains(button3); } set { if (!value) { titlepanel.Controls.Remove(button3); } else if (!titlepanel.Contains(button3)) { titlepanel.Controls.Add(button3); } } } private void ResetTitlePanel() { base.ControlBox = false; base.Text = null; SetToolTip(button1, "关闭"); button2.Size = button1.Size; SetToolTip(button2, "最大化或还原"); button3.Size = button1.Size; SetToolTip(button3, "最小化"); } private void SetToolTip(Control ctrl, string tip) { new ToolTip().SetToolTip(ctrl, tip); } public ZForm() { InitializeComponent(); ResetTitlePanel(); } private void Titlebutton_Click(object sender, EventArgs e) { Button btn = (Button)sender; switch (btn.Tag.ToString()) { case "close": { this.Close(); break; } case "max": { if (this.WindowState == FormWindowState.Maximized) { this.WindowState = FormWindowState.Normal; } else { this.WindowState = FormWindowState.Maximized; } break; } case "min": { if (this.WindowState != FormWindowState.Minimized) { this.WindowState = FormWindowState.Minimized; } break; } } } private void Titlepanel_MouseDown(object sender, MouseEventArgs e) { if (this.WindowState == FormWindowState.Maximized) { return; } //Titlepanel.Cursor = Cursors.NoMove2D; oldMousePosition = e.Location; moving = true; } private void Titlepanel_MouseUp(object sender, MouseEventArgs e) { //Titlepanel.Cursor = Cursors.Default; moving = false; } private void Titlepanel_MouseMove(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left && moving) { Point newPosition = new Point(e.Location.X - oldMousePosition.X, e.Location.Y - oldMousePosition.Y); this.Location += new Size(newPosition); } } private void Titlepanel_DoubleClick(object sender, EventArgs e) { if (titlepanel.Contains(button2)) { button2.PerformClick(); } } private void titlepanel_ControlRemoved(object sender, ControlEventArgs e) { switch (e.Control.Name) { case "button2": { if (titlepanel.Contains(button3)) { button3.Left = button1.Left - button1.Width; } break; } } } private void titlepanel_ControlAdded(object sender, ControlEventArgs e) { switch (e.Control.Name) { case "button2": { if (titlepanel.Contains(button3)) { button3.Left = button2.Left - button2.Width; } break; } case "button3": { if (titlepanel.Contains(button2)) { button3.Left = button2.Left - button2.Width; } break; } } } }

首先click是mousedown 和mouseup的结合，只有两个事件都发生了才会产生click事件，我在做button移动的时候,遇到了移动事件mousemove过后就会发生click事件，但是我只是想移动button，只发生mousemove事件代码如下： using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using

1.有边框窗体鼠标拖动事件：窗体的FormBorderStyle设置为None Point mousePosition; Point formPosition; bool isMouseDown = false;//是否按下 bool isMouseIn = false;//是否在窗体内 //鼠标按下 ///...

WinForm的FormBorderStyle设置为None后， S1：需要重写窗体移动的方法（MouseDown，MouseMove，MouseUp），见下面代码 S2：给窗体预定义的事件，添加窗体移动的方法添加成功后，在FrmMain.Designer.cs的FrmMain模块可以看到窗体的鼠标事件 this.MouseDown += new System.Windows.F...

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