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make Dialog box a component

Posted on 2003-11-26
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Last Modified: 2010-04-05
hi all,

i've tried to create a dialog component based on a form. the code seems fine, it can update property,..... but one serious problem i found that is IT DOES NOT SHOW UP when Execute()is called. Does anyone have ideas??
Below is code segment, pls advise...
thx Alot....

###############################################################################

type
  TComProgress = class(TComponent)
    pgbStatus: TProgressBar;
    lblMsg: TLabel;
    Image1: TImage;
    Image2: TImage;
    Image3: TImage;
    Image4: TImage;
    Image5: TImage;
    Image6: TImage;
    Image7: TImage;
    Timer1: TTimer;
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure refresh;
  private
    { Private declarations }
    FCaption:String;
    FPMessage: String;
    FMin: Integer;
    FMax: Integer;
    FInterval: Integer;
    FEnableTimer: Boolean;
  public
    { Public declarations }
    Count : Integer;

    constructor Create(AOwner: TComponent); override;
    //destructor Destroy; override;
    function Execute: Boolean;

    procedure UpdateFormCaption(strCaption: String);
    procedure UpdateLabelCaption(strCaption: String);
    procedure SetMaxProgressBar(MaxVal: Integer);
    procedure SetMinProgressBar(MinVal: Integer);
    procedure SetProgressBarInterval(Interval: Integer);
    function UpdateProgressBar: Boolean;
    procedure SetTimer(enable: Boolean);
    function ResetProgressBar: Boolean;

  published
    property Caption: String read FCaption write UpdateFormCaption;
    property PMessage: String read FPMessage write UpdateLabelCaption;
    property Min: Integer read FMin write SetMinProgressBar;
    property Max: Integer read FMax write SetMaxProgressBar;
    property Interval: Integer read FINterval write SetProgressBarInterval;
    property EnableTimmer: Boolean read FEnableTimer write SetTimer;
  end;
var
  ComProgress: TComProgress;

procedure Register;

implementation

{$R *.dfm}

procedure Register;
begin
  RegisterComponents('AAA', [TComProgress]);
end;

constructor TComProgress.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  // Create Timer as subcomponent of Component
  Timer1 := TTimer.Create(Self);
  Timer1.SetSubComponent(True);

  // Create ProgressBar as subcomponent of Component
  pgbStatus := TProgressBar.Create(Self);
  pgbStatus.SetSubComponent(True);
end;

function TComProgress.Execute: Boolean;
begin
  comProgress := TComProgress.Create(Application);
  try
    comProgress.Caption := Self.Caption;
    comProgress.lblMsg.caption := Self.PMessage;
    comProgress.pgbStatus.Max := Self.Max;
    comProgress.pgbStatus.Min := Self.Min;
    comProgress.pgbStatus.Step := Self.Interval;
    comProgress.Timer1.Enabled := Self.EnableTimmer;
    comprogress.FormCreate(Self);
    result := True;
  finally
    //Progress.Free;
  end;
end;

###############################################################################
0
Comment
Question by:lamtl354
3 Comments
 

Accepted Solution

by:
ChrisLM earned 200 total points
ID: 9955306
Hi,
   I got this out of the delphi help file, so you can look there as well. It's under: 'Creating Custom Components' and then 'Making a dialog box a component'.
First make a seperate form that has all your controls, procedures and all the rest of the stuff you need.
Then create a TComponent and add the unit from the form you created above to the uses clause.
Above the 'Implementation' word add:

var
  AboutBox: TAboutBox;

Then add all your necessary properties.
eg
property EnableTimer: Boolean read FEnableTimer write FEnableTimer;

After that add the execute function:
eg
  ComProgress := TComProgressDialog.Create(Application);                  
  try
    with ComProgress do
    begin
      Timer1.Enabled := EnableTimer;
      Result := ShowModal;                            
    end;
  finally
    ComProgress.Free;                                            
  end;

That's it!
Now in your application, add the component and just use the execute procedure.
eg
  ComProgress1.Execute;

--------------------------------------------Unit code should look like this. I think.------------------------------------------
unit ComProgressDlg;

interface
uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls, Forms, ComProgressUnit;

type
  TComProgress = class(TComponent)
  Private
    FEnableTimer: Boolean;
  Public
    function Execute: Boolean;
  Published
    property EnableTimer: Boolean read FEnableTimer write FEnableTimer;
  end;

procedure Register;

var
  ComProgress: TComProgressDialog;

implementation

procedure Register;
begin
  RegisterComponents('Samples', [TComProgressDlg]);
end;

function TComProgressDlg.Execute: Boolean;
begin
  ComProgress := TComProgressDialog.Create(Application);                  
  try
    with ComProgress do
    begin
      Timer1.Enabled := EnableTimer;
      Result := ShowModal;                            
    end;
  finally
    ComProgress.Free;                                            
  end;
end;

end.
---------------------------------------------------------------------------------------------------------------------------------
Chris.

I do not take any credit for this code because most of this come from the delphi help file, so you can thank them.
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