限制一行网格内的鼠标移动事件 - wpf c#答案

【问题标题】：Restrict mouse move event inside a row of Grid - wpf c#限制一行网格内的鼠标移动事件 - wpf c#
【发布时间】：2020-08-18 16:54:40
【问题描述】：

我在下面的面板中有一个按钮。我必须将这个面板内的 GLControl 移动到任何地方。但是当像下面这样尝试时，当将按钮移动到面板的边框时，GLControl 会离开面板。如何仅限制面板内按钮的移动？

<WindowsFormsHost  x:Name="windowsFormsHost1"  Grid.Row="5"   Grid.ColumnSpan="3"   Initialized="WindowsFormsHost_Initialized"    >
<wf:Panel x:Name="Panel_glcontrol" Dock="None" BackColor="yellow">
       <wf:Panel.Controls>
          <opentk:GLControl x:Name="glControl" Width="450" Height="299"
     Dock="None" MouseMove="GlControl_MouseMove" MouseDown="GlControl_MouseDown"  Resize="glControl_Resize" Paint="glControl_Paint"  />  
       </wf:Panel.Controls>
</wf:Panel>
</WindowsFormsHost>

  private System.Drawing.Point MouseDownLocation;
  private void GlControl_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
                glControl.Left = e.X + glControl.Left - MouseDownLocation.X;
                glControl.Top = e.Y + glControl.Top - MouseDownLocation.Y;
        }
    }

    private void GlControl_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            MouseDownLocation = e.Location;
        }
    }

【问题讨论】：

标签： c# wpf onmousedown onmousemove

【解决方案1】：

这看起来更像是一个 WinForms 问题。尝试对用于更新控制位置的代码设置限制。例如：

glControl.Left = Math.Min(panel.Width - glControl.Width, e.X + glControl.Left - MouseDownLocation.X);
glControl.Top = Math.Min(panel.Height - glControl.Height, e.Y + glControl.Top - MouseDownLocation.Y);

【讨论】：