private void mnuRemove_Click(object sender, EventArgs e)
{
if (SelectedIndexs.Count > 0)
{
var parts =
SelectedIndexs
.Select(i => Folder.PartIndexs[i])
.ToList();
string text;
if (parts.Count == 1)
{
text = string.Format("确定把\"{0}\"删除", Database.ImagePartTable[parts[0]].Name);
}
else
{
text = string.Format("确定把{0}项删除", parts.Count);
}
var res =
MessageBox.Show(
text,
"确定删除",
MessageBoxButtons.OKCancel);
if (res == DialogResult.OK)
{
SelectedIndexs.Clear();
SelectedItemsChanged(this, null);
foreach (var part in parts)
{
Remove(part);
}
UpdateSize(false);
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (Folder == null)
{
return;
}
var g = e.Graphics;
g.SmoothingMode = SmoothingMode.AntiAlias;
var foreColorBrush = new SolidBrush(this.ForeColor);
var halfWhiteBrush = new SolidBrush(Color.FromArgb(96, Color.White));
var ips =
from i in _visibleItems
let index = Folder.PartIndexs[i]
let Part = Database.ImagePartTable[index]
select new { Index = i, Part };
foreach (var ip in ips)
{
var pindex = GetIndex(ip.Index);
//绘制图形
var imgrec = GetImageBounds(pindex);
g.FillRectangle(foreColorBrush, imgrec);
ip.Part.Image.Draw(g, imgrec);
//计算文字位置
var name = ip.Part.Name;
var txtrec = GetTextBounds(pindex);
var txtsize = g.MeasureString(name, this.Font);
var pt = new PointF(
txtrec.Left + (txtrec.Width - txtsize.Width) / 2,
txtrec.Top - txtsize.Height / 2);
if (SelectedIndexs.Contains(ip.Index))
{
//选中图形加半透明
g.FillRectangle(halfWhiteBrush, imgrec);
var rec = new RectangleF(pt, txtsize);
rec.Offset(-1, -1);
//选中文字白色加蓝色底框
g.FillRectangle(Brushes.MediumPurple, rec);
g.DrawString(name, this.Font, Brushes.WhiteSmoke, pt);
}
else
{
//正常绘制文字
g.DrawString(name, this.Font, foreColorBrush, pt);
}
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
var pindex = GetIndexAtPoint(new Point(e.X, e.Y));
var index = GetIndex(pindex);
if (GetImageBounds(pindex).Contains(e.X, e.Y) && index < Folder.PartIndexs.Count)
{
if ((ModifierKeys & Keys.Control) == Keys.Control)
{
if (e.Button == MouseButtons.Left)
{
if (SelectedIndexs.Contains(index))
{
SelectedIndexs.Remove(index);
SelectedItemsChanged(this, null);
Invalidate(index);
}
else
{
SelectedIndexs.Add(index);
SelectedItemsChanged(this, null);
Invalidate(index);
}
}
}
else
{
if (!SelectedIndexs.Contains(index))
{
SelectedIndexs.Clear();
SelectedIndexs.Add(index);
SelectedItemsChanged(this, null);
Invalidate();
}
if (e.Button == MouseButtons.Right)
{
contextMenuStrip1.Show(this, new Point(e.X, e.Y));
}
}
}
else
{
SelectedIndexs.Clear();
SelectedItemsChanged(this, null);
Invalidate();
if (e.Button == MouseButtons.Right)
{
contextMenuStrip1.Show(this, e.X, e.Y);
}
}
base.OnMouseDown(e);
}
/// <summary>
/// 根据选中行，读取记录表中的行号和数据，排除多选的情况
/// </summary>
/// <param name="popupEvent"></param>
private GridViewPopupEventArgs SetPopupEvent(int keyIndex)
{
GridViewPopupEventArgs popupEvent = new GridViewPopupEventArgs(this);
switch (dataType)
{
case DataEnum.DataTable:
case DataEnum.DataRows:
{
var item = currentPageRowSource.Skip(keyIndex - 1).FirstOrDefault();
popupEvent.RowIndex = _dataRowSource.IndexOf(item);
popupEvent.RowSource = item;
}
break;
case DataEnum.BaseModel:
{
var item = currentPageModelSource.Skip(keyIndex - 1).FirstOrDefault();
popupEvent.RowIndex = _dataModelSource.IndexOf(item);
popupEvent.RowSource = item;
}
break;
default:
break;
}
if (!MultiSelect) //单选
{
SelectedIndexs.Clear();
SelectedIndexs.Add(popupEvent.RowIndex);
}
else //多选
{
//不存在时，选中状态，否则无响应
if (!SelectedIndexs.Contains(popupEvent.RowIndex))
{
SelectedIndexs.Add(popupEvent.RowIndex);
}
else
{
SelectedIndexs.Remove(popupEvent.RowIndex);
}
}
popupEvent.SelectedIndexs = SelectedIndexs;
return(popupEvent);
}
public void SelectNull()
{
SelectedIndexs.Clear();
SelectedItemsChanged(this, null);
this.Invalidate();
}
public IEnumerable <ImagePart> GetSelectedItems()
{
return(SelectedIndexs.Select(i => Database.ImagePartTable[Folder.PartIndexs[i]]));
}