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Kurt G

Newbee: FMX: Can't find DirectoryListBox or FileListBox

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I an totally new to RAD, and have installed RAD 11.2.

I want to convert a project from Delphi5 to RAD 11.2 in Multi-Device App. as it can rotate an Image.

I therefor started a new app. but I can not find anything like ListBox or FileListBox.

Is there no procedure or function in RAD 11.2 to do the job?

Is there another way i FMX to do it?

 

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3 hours ago, Kurt G said:

convert a project from Delphi5 to RAD 11.2 in Multi-Device App.

Best to leave that D5 code behind. FMX code can be earned by running the example samples for FMX.  The FMX code has an OpenDialog component that might give you start.

 

 

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I have given up the D5 code.

I started from beginning by selecting Multi-Device Application.

But I still nead the function to list directory and files, and I have not found any examples for that until now.

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FMX does have TListView.   

procedure TForm9.Button1Click(Sender: TObject);
var
  Lvi : TListViewItem;
  I : Integer;
  DirArray : TStringDynArray;
begin
  Lvi := ListView1.Items.Add;
  Lvi.Text := 'Hello';
  Lvi := ListView1.Items.Add;
  Lvi.Text := 'FMX';
  Lvi := ListView1.Items.Add;

  Lvi.Text := Tdirectory.GetCurrentDirectory;
  DirArray := TDirectory.GetFiles(Lvi.Text);
  var Filename: string;
  for I := 0 to High(DirArray) do
  begin
    Filename := DirArray[I];
    Lvi := ListView1.Items.Add;
    Lvi.Text := fileName;
  end;
end;

 

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unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  FMX.Controls.Presentation, FMX.StdCtrls, FMX.Layouts,
  System.IOUtils,
  FMX.ListBox;

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}

procedure TForm1.Button1Click(Sender: TObject);
var
  Lvi : TListViewItem;
  I : Integer;
  DirArray : TStringDynArray;
begin
  Lvi := ListView1.Items.Add;
  Lvi.Text := 'Hello';
  Lvi := ListView1.Items.Add;
  Lvi.Text := 'FMX';
  Lvi := ListView1.Items.Add;

  Lvi.Text := Tdirectory.GetCurrentDirectory;
  DirArray := TDirectory.GetFiles(Lvi.Text);
  var Filename: string;
  for I := 0 to High(DirArray) do
  begin
    Filename := DirArray;
    Lvi := ListView1.Items.Add;
    Lvi.Text := fileName;
  end;
end;

end.

-----------------------------------------------------

 

A lot has happened since D5! 🙂

I started a new project and placed a Tbutton and a TListBox on the form.

But the compiler give error: Undeclared identifier: TListviewItem in the line:   Lvi : TListViewItem;

 

See the code in Unit.pas.

 

 

Unit1.pas

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On 9/25/2022 at 1:28 PM, Pat Foley said:

FMX does have TListView. 

So discard old ListBox and use TListView component.  

Also add a memo1 and this 

procedure TForm9.ListView1Change(Sender: TObject);
var
  fn: string;
begin
  fn := Listview1.items[ListView1.ItemIndex].Text;
  if Pos('.txt',Fn) > 0 then
     memo1.Lines.LoadFromFile(fn);
end;

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Posted (edited)
16 hours ago, Kurt G said:

But the compiler give error: Undeclared identifier: TListviewItem in the line:   Lvi : TListViewItem;

You declare a TListbox not a TListView  so it's normal, units for Tlistview ( FMX.TlistView,FMX.TlistView.xxxx)  are not declared
works with a TlistView

image.thumb.png.0b21752a820b9aaa732b23f20e4acbd7.png


A list box (simple one without style) should be filled with Listbox1.Items.Add('Hello')
image.thumb.png.af4d5ce47078989151d43062a5ee8ed4.png

 

other way is to declare a TListboxItem

var aItem : TlistboxItem;
begin
  aItem:=TlistboxItem.Create(Self);
  aItem.Parent:=ListBox1;
  aItem.Text:='Hello';
end;

P.S. If you want to involve style, here is a tutorial I wrote (long time ago, XE4, when TListview does not exists) Intro to styles Firemonkey XE4 (sorry in French)
 

 

 

Edited by Serge_G

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Thanks for your help, it's starting to come through.
I am having problems with the components disappearing from the Frame.
I must have found a tutorial about the IDE, but it shouldn't be YOU TUBE, I prefer to read.

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Serge_G listbox coding is very nice example.  Serge's "Introduction to FireMonkey XE4 Styles" is good start about differences between FMX and VCL and in text!  His A.F.R.O may help you with the disappearing.  

 

Here's a one liner that brings up the opendialog and returns the directory or folder selected. 

   if not SelectDirectory('Dirs, Folders','', FilePath) then exit;
    DirArray := TDirectory.GetFiles(FilePath,'*.*',TSearchOption.soTopDirectoryOnly);
    ...

 

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35 minutes ago, Pat Foley said:

Serge_G listbox coding is very nice example.  Serge's "Introduction to FireMonkey XE4 Styles" is good start about differences between FMX and VCL and in text!  His A.F.R.O may help you with the disappearing.  

Thanks, but this AFRO thing is now obsolete because IDE force it when you close designer (ouf)

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20 minutes ago, Serge_G said:

because IDE force it when you close designer

What happens in Multi-Device Preview when design window closed?   Another goodie is the form screen position shows the wallpaper in color, albeit only follows left and Top and not property position setting.  

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I don't know what "AFRO" and "(ouf)" in "Thanks, but this AFRO thing is now obsolete because IDE force it when you close designer (ouf)"  mean. Can anyone help?

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TListBox is there in FMX. I'm not sure why you think it's not.

 

Regarding rotating images. You may know this already but the best way to do it is by setting the Matrix property of the TCanvas you're drawing to. Use TMatrix.CreateRotation to create the matrix from a rotation angle. The advantage of this method is that the GPU takes care of all the transformations. It's also easy to combine with other transformations such as scaling or translation. TBitmap.Rotate is essentially doing that for you, but gives you less control.

Edited by XylemFlow

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