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CreativeMD

Registriert seit: 11. Okt 2011
127 Beiträge
 
Delphi XE2 Architect
 
#3

AW: Fehler beim Parent setzen eines Labels

  Alt 28. Jun 2012, 16:50
Ich arbeite an einem Chatprogramm
und zur Verschönerung nehme ich kein Memo, sondern
füge die Objekte in ein Panel.

Chatsystem.pas:
Delphi-Quellcode:
unit ChatSystem;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
  System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, IdContext, Vcl.ComCtrls, Vcl.StdCtrls,
  IdCustomTCPServer, IdTCPServer, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient, Vcl.Menus, Vcl.ExtCtrls, mmSystem, ClipBrd, User, Contnrs,
  Data.DB, Datasnap.DBClient, Datasnap.Win.MConnect, Datasnap.Win.SConnect,
  Vcl.OleCtrls, SHDocVw, JvExStdCtrls, JvRichEdit, ShellApi;

procedure renderLabels;
procedure addButton(id: Integer; Text: String);
procedure addProgessbar(id: Integer);
procedure addImage(Text: String);
procedure addText(Text: String);
procedure addUserText(Text: String);
procedure newMessage;
procedure Create;

implementation

uses Main, Optionen, Aufnahme, Beitreten, Erstellen, Favoriten, Feld, Player,
  FileSystem;

var
  Label_Create: TLabel;
  Image_Create: TImage;
  Progressbar_Create: TProgressBar;
  Button_Create: TButton;
  current_Height : Integer;

procedure Create;
begin

end;

  procedure newMessage;
  begin
  renderLabels;
    Form1.ScrollBar1.Position := current_Height - Form1.ScrollBar1.PageSize;
    renderLabels;
  end;

procedure renderLabels;
var
  zahl: Integer;
begin

  current_Height := 0;

  for zahl := 0 to Form1.Text_Objects.count - 1 do
  begin

    case (Form1.Text_Objects[zahl] as TComponent).Tag of
      0:
        begin
          // Label
          (Form1.Text_Objects[zahl] as TLabel).Top := current_Height -
            Form1.ScrollBar1.Position;
          current_Height := current_Height +
            (Form1.Text_Objects[zahl] as TLabel).Height;
        end;

      1:
        begin
          // Ausrechnen der Größe
          (Form1.Text_Objects[zahl] as TImage).Height :=
            Form1.Panel1.Height div 3;

          (Form1.Text_Objects[zahl] as TImage).Width :=
            (Form1.Text_Objects[zahl] as TImage)
            .Picture.Width div ((Form1.Text_Objects[zahl] as TImage)
            .Picture.Height div (Form1.Text_Objects[zahl] as TImage).Height);

          // Ausrechen der Position
          (Form1.Text_Objects[zahl] as TImage).Top := current_Height -
            Form1.ScrollBar1.Position;
          current_Height := current_Height +
            (Form1.Text_Objects[zahl] as TImage).Height;
        end;
      2:
        begin
          // Progressbar
          (Form1.Text_Objects[zahl] as TProgressBar).Top := current_Height -
            Form1.ScrollBar1.Position;
          current_Height := current_Height +
            (Form1.Text_Objects[zahl] as TProgressBar).Height;
        end;
      3:
        begin
          // button
          (Form1.Text_Objects[zahl] as TButton).Top := current_Height -
            Form1.ScrollBar1.Position;
          current_Height := current_Height +
            (Form1.Text_Objects[zahl] as TButton).Height;
        end;
    end;

  end;
  current_Height := current_Height + 10;

  if Form1.Panel1.Height < current_Height then
  begin
  Form1.ScrollBar1.Max := current_Height;
    Form1.ScrollBar1.PageSize := Form1.Panel1.Height;
    Form1.ScrollBar1.Enabled := true;

  end
  else
  begin
    Form1.ScrollBar1.Enabled := false;
  end;



 Application.ProcessMessages;
end;

procedure addUserText(Text: String);
begin
  Label_Create := TLabel.Create(Form1.Panel1);
  Label_Create.Parent := Form1.Panel1;

  Label_Create.Caption := Text;
  Label_Create.Top := 0;
  Label_Create.Left := 0;
  Label_Create.Autosize := false;
  Label_Create.Font.size := 13;

  Label_Create.Width := Form1.Panel1.Width;
  Label_Create.Height := 20;

  Label_Create.Font.Color := clHotLight;

  Label_Create.Tag := 0;
  Label_Create.OnMouseDown := Form1.onMouseClick;
  Label_Create.Cursor := crHandPoint;

  Form1.Text_Objects.Add(Label_Create);

  //newMessage;
end;

procedure addText(Text: String);
begin
  Label_Create := TLabel.Create(Form1.Panel1);
  Label_Create.Parent := Form1.Panel1;

  Label_Create.Caption := Text;
  Label_Create.Top := 0;
  Label_Create.Left := 10;
  Label_Create.Autosize := true;
  Label_Create.Tag := 0;
  Label_Create.OnMouseEnter := Form1.onMouseOver;
  Label_Create.OnMouseLeave := Form1.onMouseOut;

  Form1.Text_Objects.Add(Label_Create);

  newMessage;

end;

procedure onMouseOver(Sender: TObject);
begin
  case (Sender as TComponent).Tag of
    0:
      (Sender as TLabel).Font.Style := (Sender as TLabel).Font.Style + [fsBold];
end;

renderLabels;
end;

procedure onMouseOut(Sender: TObject);
begin
  case (Sender as TComponent).Tag of
    0:
      (Sender as TLabel).Font.Style := (Sender as TLabel).Font.Style - [fsBold];
end;
renderLabels;
end;

procedure addImage(Text: String);
begin
  Image_Create := TImage.Create(Form1.Panel1);
  Image_Create.Parent := Form1.Panel1;
  Image_Create.Picture.LoadFromFile(Text);
  Image_Create.Height := 150;
  Image_Create.Width := Image_Create.Picture.Width div
    (Image_Create.Picture.Height div Image_Create.Height);
  Image_Create.Stretch := true;
  Image_Create.Top := 0;
  Image_Create.Left := 10;
  Image_Create.Tag := 1;
  Image_Create.OnMouseDown := Form1.onMouseClick;
  Image_Create.DragMode := dmAutomatic;

  Form1.Text_Objects.Add(Image_Create);

  newMessage;
end;

procedure addProgessbar(id: Integer);
begin
  Progressbar_Create := TProgressBar.Create(Form1.Panel1);
  Progressbar_Create.Parent := Form1.Panel1;
  Progressbar_Create.Left := 10;
  Progressbar_Create.Top := 0;

  Progressbar_Create.Max := 100;
  Progressbar_Create.Position := 0;
  Progressbar_Create.Height := 20;
  Progressbar_Create.Width := 100;

  Progressbar_Create.Tag := 2;
  Progressbar_Create.MarqueeInterval := id;

  Form1.Text_Objects.Add(Progressbar_Create);

  newMessage;


end;

procedure addButton(id: Integer; Text: String);
begin
  Button_Create := TButton.Create(Form1.Panel1);
  Button_Create.Parent := Form1.Panel1;
  Button_Create.Caption := Text;
  Button_Create.Left := 10;
  Button_Create.Top := 0;
  // Button_Create.Height := Form1.Canvas.TextHeight(Text) + 10;
  // Button_Create.Width := Form1.Canvas.TextWidth(Text) + 10;
  Button_Create.Tag := 3;
  // Button_Create.TBDockHeight := id;

  Form1.Text_Objects.Add(Button_Create);

  newMessage;
end;

end.
http://i.imgur.com/QRXUE.png

Der Fehler passiert, aber nur wenn der Client oder der Server Aktiv sind, aber davor hat es funktioniert
und wenn ich mit dem Compiler den Code verfolge stürzt er beim 2 oder 3 mal ab.
  Mit Zitat antworten Zitat