Solved

Help needed with TreeView

Posted on 2009-05-18
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Last Modified: 2012-05-07
Dear Experts,
I want to use a treeview, but i don't know nothing about it.
And i need to make my treeview working asap.
So there will be lots of points to be earned.

I have 2 buttons on the toolbar, one is for to create a node as a folder in the treeview
and 1 is to create a file in a treeview. For every node there is a window appearing
where the user can enter the filename or foldername.
How can I do that?

Greeting, PeterKiers



Example.jpg
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Question by:peterkiers
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8 Comments
 
LVL 1

Author Comment

by:peterkiers
ID: 24409886
send the wrong picture...
Examle.jpg
0
 
LVL 37

Accepted Solution

by:
Geert Gruwez earned 500 total points
ID: 24410060
you need to add a TImageList (you other Q) with a Folder icon and a File icon


unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, ComCtrls, ImgList;
 
type
  TForm1 = class(TForm)
    btnAddFolder: TButton;
    TreeView1: TTreeView;
    Edit1: TEdit;
    btnAddFile: TButton;
    ImageList1: TImageList;
    procedure btnAddFolderClick(Sender: TObject);
    procedure btnAddFileClick(Sender: TObject);
  private
    procedure AddItem(aText: string; aIndex: Integer; aParent: TTreeNode);
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.AddItem(aText: string; aIndex: Integer; aParent: TTreeNode);
var item: TTreeNode;
begin
  item := TTreeNode.Create(TreeView1.Items);
  item.Text := aText;
  item.ImageIndex := aIndex;
  item.SelectedIndex := aIndex;
  TreeView1.Items.AddNode(item, aParent, aText, nil, naAddChild);
end;
 
procedure TForm1.btnAddFileClick(Sender: TObject);
begin
  if (TreeView1.Selected <> nil) and (TreeView1.Selected.ImageIndex = 0) then
  begin
    AddItem(Edit1.Text, 1, TreeView1.Selected);
  end else
    ShowMessage('First select a folder');
end;
 
procedure TForm1.btnAddFolderClick(Sender: TObject);
begin
  AddItem(Edit1.Text, 0, nil);
end;
 
-- dfm --
object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 501
  ClientWidth = 520
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object btnAddFolder: TButton
    Left = 352
    Top = 64
    Width = 75
    Height = 25
    Caption = 'Add folder'
    TabOrder = 0
    OnClick = btnAddFolderClick
  end
  object TreeView1: TTreeView
    Left = 24
    Top = 24
    Width = 306
    Height = 209
    Images = ImageList1
    Indent = 19
    TabOrder = 1
  end
  object Edit1: TEdit
    Left = 352
    Top = 32
    Width = 121
    Height = 21
    TabOrder = 2
    Text = 'Edit1'
  end
  object btnAddFile: TButton
    Left = 352
    Top = 96
    Width = 75
    Height = 25
    Caption = 'Add file'
    TabOrder = 3
    OnClick = btnAddFileClick
  end
  object ImageList1: TImageList
    Left = 464
    Top = 88
    Bitmap = {
      494C010102000400040010001000FFFFFFFFFF00FFFFFFFFFFFFFFFF424D3600
      0000000000003600000028000000400000001000000001002000000000000010
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      000000000000000000000000000000000000424D3E000000000000003E000000
      2800000040000000100000000100010000000000800000000000000000000000
      000000000000000000000000FFFFFF00BFFFFFFF00000000BFFFE00700000000
      B049E00700000000807FE00700000000B07FE00700000000B9FFE00700000000
      BFFFE00700000000B049E00700000000807FE00700000000B07FE00700000000
      B9FFE00700000000BFFFE00F00000000048FE01F0000000007FFE03F00000000
      07FFFFFF000000009FFFFFFF00000000}
  end
end

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LVL 1

Author Comment

by:peterkiers
ID: 24410130
Thank you for the solutions, it works great.
One litte question you have used a Edti1 on the form
where the user can enter a name for his file or folder.
but I want to have the edit1 on separate dialogform
is it possible to create one dynamicly or do i have
to create 2 forms.
P.
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LVL 37

Expert Comment

by:Geert Gruwez
ID: 24410640
did you try


procedure TForm1.btnAddFolderClick(Sender: TObject);
var aText: string;
begin
  if InputQuery('Folder', 'Enter a folder name', aText) then
    AddItem(aText, 0, nil);
end;

Open in new window

0
 
LVL 1

Author Comment

by:peterkiers
ID: 24411581
Thanks,
could you help me with the BtnFileClick
How do i have to implement it in the BtnFileClick procedure?

P.

0
 
LVL 1

Author Comment

by:peterkiers
ID: 24411604
Because i appreciate your help i will put it in a new question.

P.
0
 
LVL 37

Expert Comment

by:Geert Gruwez
ID: 24411608
procedure TForm1.btnAddFileClick(Sender: TObject);
var aText: string;
begin
  if (TreeView1.Selected <> nil) and (Treeview1.Selected.ImageIndex = 0) then
  begin
    if InputQuery('File', 'Enter a file name', aText) then
      AddItem(aText, 1, TreeView1.Selectedl);
  end else
    ShowMessage('Select a folder in the treeview first.');
end;
0
 
LVL 37

Expert Comment

by:Geert Gruwez
ID: 24411609
lol, not fast enough i guess
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