unigui菜单【3】

unigui菜单TuniTreeView

根据数据库表中的内容，显示菜单的处理：

function TMainForm.CreateMenu: Integer;
var
  myMenuPoint : PMyMenuRec;
  i :Integer;
  menu_id ,menu_name, menu_url: string;
  mynodes : TUniTreeNodes;
  mynode,tmp_node : TUniTreeNode;
begin //建立菜单树
  MenuTree.Items.Clear;
  mynodes := MenuTree.Items;
  MenuTree.BeginUpdate;
  with UniMainModule do
    begin //取表中菜单
      fdqryBase.Open('select* from sm_menu order by menu_id');
      fdqryBase.First;
      while not fdqryBase.Eof do
        begin
          menu_id := fdqryBase.FieldByName('menu_id').AsString;
          menu_name := fdqryBase.FieldByName('menu_name').AsString;
          if fdqryBase.FieldByName('menu_url').AsString = '' then
            begin  //确认是否根菜单
              mynode := mynodes.Add(nil,fdqryBase.FieldByName('menu_name').AsString);
            end else
            begin

              tmp_node := mynodes.add(mynode,menu_name);
              New(myMenuPoint);
              myMenuPoint^.menu_id := menu_id;
              myMenuPoint^.menu_name := menu_name;
              myMenuPoint^.menu_url := fdqryBase.FieldByName('menu_url').AsString;
              tmp_node.Data :=  myMenuPoint;

            end;
          fdqryBase.Next;
        end;
    end;
  MenuTree.EndUpdate;

  for i := 0 to MenuTree.Items.Count-1 do
    begin
      mynode := MenuTree.Items[i];
      if mynode.HasChildren then begin
        mynode.ImageIndex := 0;
        mynode.SelectedIndex := 0;
      end else begin
        mynode.ImageIndex := 2;
        mynode.SelectedIndex := 3;
      end;
  end;
  MenuTree.FullCollapse;
end;

View Code

其中item的node有二个属性caption和data。把指针data用起来，在点击时自动调用显示form。

type
   PMyMenuRec = ^TMyMenuRec;
   TMyMenuRec = Record
     menu_id:string;
     menu_name:string;
     menu_url:string;
   end;

点击菜单项的处理

procedure TMainForm.MenuTreeClick(Sender: TObject);
begin
  if Assigned(MenuTree.Selected.data) then
     begin
       if PMyMenuRec(MenuTree.Selected.data).menu_url<>'' then
        ShowFrame(PMyMenuRec(MenuTree.Selected.data).menu_name,PMyMenuRec(MenuTree.Selected.data).menu_url);
     end;
end;

猜你喜欢