TreeView设置节点不同高度一种实现
效果如下

为了实现不同节点有不同的高度，本想重新做个TreeView，但是时间来不急了，只好想了个折中的办法

const int nGroupItemHeight = 22;
const int nNormalItemHeight = 30;
const int nSelectedItemHeight = 50;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
    tvInfo->DoubleBuffered = true;

    int cyItemHeight = 1;
    SendMessage(tvInfo->Handle,TVM_SETITEMHEIGHT,(WPARAM)(SHORT)cyItemHeight,0);//修改节点高度至1像素

}
//---------------------------------------------------------------------------
void __fastcall TForm1::tvInfoCustomDrawItem(TCustomTreeView *Sender, TTreeNode *Node,
          TCustomDrawState State, bool &DefaultDraw)
{
    //以下参考妖哥的ListBox自绘
    DefaultDraw = false;

    TRect Rect = Node->DisplayRect(false);
    // 填充的背景颜色
    Sender->Canvas->Brush->Color = clWhite;
    // 文字颜色
Sender->Canvas->Font->Color = clBlack;
    // 填充背景
Sender->Canvas->FillRect (Rect) ;
    // 圆角矩形的背景颜色
    Sender->Canvas->Brush->Color = TColor(0x00FFF7F7);
    // 圆角矩形的边框颜色
    Sender->Canvas->Pen->Color = TColor(0x00131315);
    // 画出圆角矩形
    Sender->Canvas->RoundRect(Rect.Left + 3, Rect.Top + 3,
            Rect.Right - 2, Rect.Bottom - 2, 8, 8);
    // 以不同的宽度和高度再画一次，实现立体效果
    Sender->Canvas->RoundRect(Rect.Left + 3, Rect.Top + 3,
            Rect.Right - 3, Rect.Bottom - 3, 5, 5);


    // 如果是当前选中项
    if(State.Contains(odSelected))
    {

        // 选中项的背景颜色
Sender->Canvas->Brush->Color = TColor(0x00FFB2B5);
        // 以不同的背景色画出选中项的圆角矩形
Sender->Canvas->RoundRect(Rect.Left + 3, Rect.Top + 3,
                Rect.Right - 3, Rect.Bottom - 3, 5, 5);
        // 选中项的文字颜色
        Sender->Canvas->Font->Color = clBlue;

        // 如果当前项拥有焦点
        if(State.Contains(odFocused))
            // 重画焦点虚框，实际上就是擦除了原先的焦点虚框
            // 我看到CnPack的设置中好象没有去除那个框. ccrun注
            ::DrawFocusRect(Sender->Canvas->Handle, &Rect);



}
// 画出图标
    ImageList1->Draw(Sender->Canvas, Rect.Left + 7 + (nTimer%2),
            Rect.top + (Rect.Height() - ImageList1->Height)/2, 1, true);
    // Item的第一行文字
    Sender->Canvas->TextOutA(Rect.Left + Node->Level*32 + 20, Rect.Top + 4,
Node->Text);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::btnInitClick(TObject *Sender)
{
tvInfo->Items->Clear();
tvInfo->Items->BeginUpdate();
for(int nGroupIndex=0;nGroupIndex<100;nGroupIndex++)
    {
      TTreeNode* nGroupNode = tvInfo->Items->Add(NULL,"Group"+IntToStr(nGroupIndex));
      TVITEMEX itemEx;
      TTreeNode* nCurrNode = nGroupNode;
      itemEx.hItem = nCurrNode->ItemId;
      itemEx.mask = TVIF_INTEGRAL;
  itemEx.iIntegral = nGroupItemHeight;
      SendMessage(tvInfo->Handle,TVM_SETITEM, 0, LPARAM(&itemEx));//调整高度
      for(int nItem=0;nItem<10;nItem++)
      {
        TTreeNode* nNode = tvInfo->Items->AddChild(nGroupNode,"Item"+IntToStr(nItem));

        TVITEMEX itemEx;
        TTreeNode* nCurrNode = nNode;
        itemEx.hItem = nCurrNode->ItemId; 
 
        itemEx.mask = TVIF_INTEGRAL;
        itemEx.iIntegral = nNormalItemHeight;
        SendMessage(tvInfo->Handle,TVM_SETITEM, 0, LPARAM(&itemEx));//调整高度

      }
    }

    tvInfo->Items->EndUpdate();
}
//---------------------------------------------------------------------------

void __fastcall TForm1::tvInfoChanging(TObject *Sender, TTreeNode *Node, bool &AllowChange)

{
        //

tvInfo->Items->BeginUpdate();
TTreeNode* nCurrNode = NULL;
    TVITEMEX itemEx;

    if( tvInfo->Selected != NULL )
    {

      nCurrNode = tvInfo->Selected;
      if( nCurrNode->Level != 0 )
      {
      itemEx.hItem = nCurrNode->ItemId;
      itemEx.mask = TVIF_INTEGRAL;
  itemEx.iIntegral = nNormalItemHeight;
      SendMessage(tvInfo->Handle,TVM_SETITEM, 0, LPARAM(&itemEx));//还原选中节点高度
      }
    }


    nCurrNode = Node;
    if( nCurrNode->Level != 0 )
    {
    itemEx.hItem = nCurrNode->ItemId;
    itemEx.mask = TVIF_INTEGRAL;
    itemEx.iIntegral = nSelectedItemHeight;
    SendMessage(tvInfo->Handle,TVM_SETITEM, 0, LPARAM(&itemEx));//更改新的选中节点高度
    }

tvInfo->Items->EndUpdate();
}
//---------------------------------------------------------------------------

void __fastcall TForm1::tvInfoMouseDown(TObject *Sender, TMouseButton Button, TShiftState Shift,
          int X, int Y)
{
    //自绘模式下行选
    TTreeNode *ClickNode;
    ClickNode = tvInfo->GetNodeAt(X, Y);
    if(ClickNode != NULL)
        ClickNode->Selected = true;
}
//---------------------------------------------------------------------------

存在问题：
当节点数量过多时，控件选中反应有点迟钝，估计是由于BeginUpdate和EndUpdate造成的，但是如果去掉这个好像在自绘函数里面DisplayRect计算的矩形区域就会有错，不知是否有好的办法可以修改一下
[解决办法]
好,帮你顶一下
以前看过,有比较完善的三方控件,你可以直接用一下
[解决办法]
devexpress可以做出很多效果。
[解决办法]

引用:

效果如下

为了实现不同节点有不同的高度，本想重新做个TreeView，但是时间来不急了，只好想了个折中的办法



C/C++ code
?



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研究一下