能調整大小并可触發點擊事件的多行表頭
能調整大小并可触發點擊事件的多行表頭
原理:利用Spliter結合一棵樹來做,主要是靈活設置Dock屬性
public partial class HeadItem : Panel
{
private string text;
private Button btn ;
public HeadItem()
{
InitializeComponent();
this.Resize += new EventHandler(HeadPanel_Resize);
}
void HeadPanel_Resize(object sender, EventArgs e)
{
this.Refresh();
}
public new string Text
{
get
{
return this.text;
}
set
{
this.text = value;
}
}
protected override void OnPaint(PaintEventArgs e)
{
ControlPaint.DrawButton(e.Graphics, 1, 1, this.ClientRectangle.Width - 2, this.ClientRectangle.Height - 2, ButtonState.Normal);
StringFormat format = new StringFormat(StringFormatFlags.FitBlackBox);
e.Graphics.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), new PointF(0, 0),format);
base.OnPaint(e);
}
}
//--------------
public partial class Header : Panel
{
private TreeNodeCollection headCollection ;
public TreeNodeCollection HeadCollection
{
get
{
return this.headCollection;
}
set
{
this.headCollection = value;
}
}
//畫本身及子控件
private void LayoutItem(TreeNode node, Panel panel)
{
if (node == null)
{
return;
}
int count = node.Nodes.Count;
if (count == 0)//沒有子結點的情況
{
HeadItem item = new HeadItem();
item.Dock = DockStyle.Fill;
item.Text = node.Text;
panel.Controls.Add(item);
}
if (count > 0)//有子節點的情況
{
int width = panel.Width / count;
Panel bottomPn = new Panel();
bottomPn.Dock = DockStyle.Fill;
panel.Controls.Add(bottomPn);
Splitter spli = new Splitter();
spli.Height = 2; ;
spli.Dock = DockStyle.Top;
panel.Controls.Add(spli);
HeadItem item = new HeadItem();
item.Dock = DockStyle.Top;
item.Text = node.Text;
panel.Controls.Add(item);
for (int i = count - 1; i >= 0; --i)
{
if (i == count - 1)
{
//先放最右邊的那個
Panel rightPn = new Panel();
rightPn.Dock = DockStyle.Fill;
rightPn.Text = node.Text;
rightPn.Width = bottomPn.Width / count;
bottomPn.Controls.Add(rightPn);
LayoutItem(node.Nodes[i], rightPn);
}
else
{
Splitter spli2 = new Splitter();
spli2.Width = 2;
spli2.Dock = DockStyle.Left;
bottomPn.Controls.Add(spli2);
Panel leftPn = new Panel();
leftPn.Text = node.Text;
leftPn.Dock = DockStyle.Left;
leftPn.Width = bottomPn.Width / count;
bottomPn.Controls.Add(leftPn);
LayoutItem(node.Nodes[i], leftPn);
}
}
}
}
private void LayoutTree(TreeNodeCollection tree, Panel panel)
{
this.Controls.Clear();
int count = tree.Count;
for (int i = count - 1; i >= 0; --i)
{
int width = panel.Width / count;
if (i == count - 1)
{
Panel pn = new Panel();
pn.Dock = DockStyle.Fill;
pn.Width = width;
panel.Controls.Add(pn);
LayoutItem(tree[i], pn);
}
else
{
Splitter spli = new Splitter();
spli.Width = 2;
spli.Dock = DockStyle.Left;
panel.Controls.Add(spli);
Panel leftPn = new Panel();
leftPn.Text = tree[i].Text;
leftPn.Dock = DockStyle.Left;
leftPn.Width = width;
panel.Controls.Add(leftPn);
LayoutItem(tree[i], leftPn);
}
}
}
//1,集合屬性還不知道怎么做
//2,也不知道該在哪里触發LayoutTree函數,放在OnPaint不行.
//3.如何触發點擊事件還沒做
}