孔子说，“人的毛病都是惯出来的”，古人说的对。
现在用户对按钮点击排序不满意了， 希望拖拽排序，，好吧，身为码农就是苦B的命。
重载GridControl控件，对MouseMove、MouseDown、MouseUp事件修改一下。
多谢涛神提供的获取行信息，据说这是内部传阅的资资料 。
效果：
直接看代码：
[C#] 纯文本查看 复制代码
public class Gc11 : DevExpress.XtraGrid.GridControl
{
GridView gv22 = null;
Point m_mouseDownLocation;
int m_dragHandle;
DragForm m_dragRowShadow;
/// <summary>
///
/// </summary>
/// <param name="ev"></param>
protected override void OnMouseDown(MouseEventArgs ev)
{
if (ev.Button == MouseButtons.Left)
{
//只允许鼠标左键拖拽功能
if (gv22 == null)
{
gv22 = ((GridView)base.MainView);
}
//看看点击到哪个地方，如果点击了记录行，允许拖拽，只是允许，还没有开始拖拽。
var _hit = gv22.CalcHitInfo(ev.Location);
if (_hit.RowHandle >= 0)
{
m_dragHandle = _hit.RowHandle;
m_mouseDownLocation = ev.Location;
}
else
{
m_dragHandle = -1;
}
}
base.OnMouseDown(ev);
}
/// <summary>
///
/// </summary>
/// <param name="ev"></param>
protected override void OnMouseMove(MouseEventArgs ev)
{
if (ev.Button == MouseButtons.Left && m_dragHandle >= 0)
{
if (m_dragRowShadow == null)
{
double _x2 = Math.Pow((ev.Location.X - m_mouseDownLocation.X), 2);
double _y2 = Math.Pow((ev.Location.Y - m_mouseDownLocation.Y), 2);
double _d2 = Math.Sqrt(_x2 + _y2);
if (_d2 > 3)
{
//鼠标移动的距离，可以判定不是手抖，启动拖拽功能。
//执行拖拽；
this.BeginDrag(m_dragHandle);
//var _info = (DevExpress.XtraGrid.Views.Grid.ViewInfo.GridViewInfo)gv22.GetViewInfo();
//_info.GetGridRowInfo(0).CalcRectangle
}
}
else
{
m_dragRowShadow.Location = new Point(m_dragRowShadow.Location.X, this.PointToScreen(ev.Location).Y);
}
}
base.OnMouseMove(ev);
}
/// <summary>
///
/// </summary>
/// <param name="ev"></param>
protected override void OnMouseUp(MouseEventArgs ev)
{
if (m_dragRowShadow != null)
{
var _hit = gv22.CalcHitInfo(ev.Location);
this.EndDrag(_hit.RowHandle);
}
base.OnMouseUp(ev);
}
private void BeginDrag(int _handle)
{
var _info = (DevExpress.XtraGrid.Views.Grid.ViewInfo.GridViewInfo)gv22.GetViewInfo();
//_info.GetGridRowInfo(0).CalcRectangle
Rectangle _bound = _info.GetGridRowInfo(_handle).Bounds;
_bound.Location = this.PointToScreen(_bound.Location);
m_dragRowShadow = new NetTest1.DragForm(_bound);
m_dragRowShadow.Show();
}
private void EndDrag(int _handle)
{
if (m_dragRowShadow != null)
{
m_dragRowShadow.Close();
m_dragRowShadow.Dispose();
m_dragRowShadow = null;
int _rowIndex = gv22.GetDataSourceRowIndex(m_dragHandle);
DataRow _row = ((DataTable)this.DataSource).Rows[_rowIndex];
object[] _values = _row.ItemArray;
base.BeginUpdate();
//移除目标行；
((DataTable)this.DataSource).Rows.RemoveAt(m_dragHandle);
_row = ((DataTable)this.DataSource).NewRow();
_row.ItemArray = _values;
if (_handle >= 0)
{
//插入指定位置；
((DataTable)this.DataSource).Rows.InsertAt(_row, _handle);
gv22.FocusedRowHandle = _handle;
}
else
{
//添加；
((DataTable)this.DataSource).Rows.Add(_row);
gv22.FocusedRowHandle = gv22.RowCount - 1;
}
base.EndUpdate();
}
}
}
源码下载
链接：https://pan.baidu.com/s/1GjSbGUpdL2kDxVO5FTXsow
提取码：ew3n
| 
发表于 2019-7-15 13:32:10
