使用目录树和过滤填充TreeView

时间:2009-12-27 23:17:52

标签: delphi treeview tree lazarus

在Lazarus 0.9.28.2项目中,我有TTreeView,我的表单上有DirTree的名称frmConvert,但是我想用所有目录树填充它,自C:\

像这样:
C:\ Directory Tree http://i.imagehost.org/0185/cdirtree.png

当用户选择目录时,在第二个TTreeView中,名称为FileTree,显示该目录中的所有文件,但过滤后只显示PDF。

此外,我希望获得帮助来放置这些图标,因为对于最终用户而言更加有条理和友好是非常好的。

问题

  • 如何在所有导演中填充第一个TTreeView(DirTree),如图片中所示?
  • 如何使用FileTree上所选目录中的文件填充第二个TTreeview(DirTree)?
  • 如何在DirTree上为每个文件夹(仅限文件夹)设置图标?

1 个答案:

答案 0 :(得分:4)

填充dirTree的代码(已修订)

procedure TForm1.FormClick(Sender: TObject);
var
  sr: TSearchRec;
  FileAttrs: Integer;
  theRootNode : tTreeNode;
  theNode : tTreeNode;
begin
   FileAttrs := faDirectory;     // Only care about directories
   theRootNode := DirTree.Items.AddFirst(nil,'c:\');
   if FindFirst('c:\*.*', FileAttrs, sr) = 0 then
    begin
      repeat
        if (sr.Attr and FileAttrs) = sr.Attr then
        begin
            theNode := dirTree.Items.AddChild(theRootNode,sr.name);
            AddDirectories(theNode,'c:\'+sr.Name);
        end;
      until FindNext(sr) <> 0;
      FindClose(sr);
    end;
//    DirTree.FullExpand;
end;

****代码填充FileTree(已修订)****

procedure TForm1.FilteredTV(theDir: string;ext:String;startNode:tTreeNode);
var
  sr: TSearchRec;
  FileAttrs: Integer;
  theNode : tTreeNode;
begin
   if copy(ext,1,1)<>'.' then ext := '.'+ext;
   FileAttrs := faAnyfile;
   if startNode = nil then
       StartNode := FileTree.Items.AddFirst(nil,theDir);
   if FindFirst(theDir+'\*.*', FileAttrs, sr) = 0 then
    begin
      repeat
        if (sr.Attr=faDirectory) and (copy(sr.Name,1,1)<>'.') then
            begin
                theNode := FileTree.Items.AddChild(StartNode,sr.name);
                theNode.ImageIndex := 0;   // Use folder image for directories
                FilteredTV(theDir+'\'+sr.name,ext,theNode);
            end
        else
            if ((sr.Attr and FileAttrs) = sr.Attr) and (ExtractFileExt(sr.name)=ext)
            then
            begin
                theNode := FileTree.Items.AddChild(StartNode,sr.name);
                theNode.ImageIndex := -1;   // No image for files
            end;

      until FindNext(sr) <> 0;
      FindClose(sr);
    end;
    FileTree.FullExpand;
end;

添加到表单的其他过程

procedure TForm1.AddDirectories(theNode: tTreeNode; cPath: string);
var
  sr: TSearchRec;
  FileAttrs: Integer;
  theNewNode : tTreeNode;
begin
   FileAttrs := faDirectory;     // Only care about directories
   if FindFirst(cPath+'\*.*', FileAttrs, sr) = 0 then
    begin
      repeat
        if  ((sr.Attr and FileAttrs) = sr.Attr) and (copy(sr.Name,1,1) <> '.')
        then
        begin
            theNewNode := dirTree.Items.AddChild(theNode,sr.name);
            AddDirectories(theNewNode,cPath+'\'+sr.Name);
        end;
      until FindNext(sr) <> 0;
      FindClose(sr);
    end;
end;

您需要向表单添加图像列表,向其添加文件夹图标(borland公共文件中有一个),然后将图像列表与目录树视图和filetree树视图

如何调用FILTEREDTV程序的示例

将以下代码附加到目录树的OnClick事件

procedure TForm1.DirTreeClick(Sender: TObject);
var
  cBuild : string;
  theNode : tTreeNode;
begin
    if DirTree.Selected <> nil then
    begin
        theNode := DirTree.Selected;
        cBuild := theNode.Text;
        while theNode.Parent <> nil do
        begin
            cBuild := theNode.Parent.Text+'\'+cBuild;
            theNode := theNode.Parent;
        end;
        cBuild := stringReplace(cBuild,'\\','\',[rfReplaceAll]);
        FilteredTV(cBuild,'pdf',nil);
    end;

end;