creating text

how to create a text using tlabel created at run time when everytime we clicked a button the text appears on the form and each label can be drag or resize ?
davelahAsked:
Who is Participating?
 
EpsylonConnect With a Mentor Commented:
Here's my version. It drops a Label anywhere you click on the form and it doesn't need OnMouseDown and OnMouseUp like edey's   :o)



procedure TForm1.FormClick(Sender: TObject);
var p: TPoint;
begin
  GetCursorPos(p);
  p := ScreenToClient(p);
  with TLabel.Create(Self) do
  begin
    Left := p.x;
    Top := p.y;
    Caption := 'Label';
    Parent := Form1;
    OnMouseMove := LabelMouseMove;
  end;
end;

procedure TForm1.LabelMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var p: TPoint;
    l: TLabel;
begin
   if ssLeft in Shift then
   begin
     l := (Sender as TLabel);
     p.x := X;
     p.y := Y;
     p := l.ClientToScreen(p);
     p := ScreenToClient(p);
     l.left := p.x;
     l.Top := p.y;
   end;
end;
0
 
jeurkCommented:
Euh, sorry, but you need to reformulate your question.
Regards...
0
 
neostudioCommented:
will you translate your question to english ???
0
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
edeyCommented:
are you looking to be able to dynamicaly create, at runtime, TLabels that you can drag? If so then you could try something like this:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, stdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Label1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Label1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Label1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
  TDragLabel = class(TLabel)
  private
     isDragging : boolean;
  end;
var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
     with TDragLabel.create(self) do
     begin
          parent := Form1;
          caption := 'Drag Me!';
          onMouseDown := form1.label1MouseDown;
          onMouseUp := form1.label1MouseUp;
          onMouseMove := form1.label1MouseMove;
     end;
end;

procedure TForm1.Label1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
     TDraglabel(sender).isDragging := true;
end;

procedure TForm1.Label1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
     TDragLabel(sender).isDragging := false;
end;

procedure TForm1.Label1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var
   pt : TPoint;
begin
     with sender as TDragLabel do
          if isDragging then
          begin
               pt := form1.screenToClient(clientToScreen(point(x,y)));
               left := pt.x;
               top := pt.y;
          end;
end;

end.


Gl
Mike
0
 
spiffenCommented:
I guess he wants an example howto create a label on a form in runtime.
Like the formbuilder works.


procedure TForm1.Button1Click(Sender: TObject);
var lbl :TLabel;
begin
  lbl := TLabel.create(self);
  lbl.Font.Size := 10;
  lbl.caption := 'blabla';
  lbl.Left := 50;
  lbl.Top := 50;
  lbl.parent := self;
  lbl.OnClick := doamoveorreziseproc;
end;

But I can't do the whole thing fast.
0
 
EpsylonCommented:
Here's my version. It drops a Label anywhere you click on the form and it doesn't need OnMouseDown and OnMouseUp like edey's   :o)



procedure TForm1.FormClick(Sender: TObject);
var p: TPoint;
begin
  GetCursorPos(p);
  p := ScreenToClient(p);
  with TLabel.Create(Self) do
  begin
    Left := p.x;
    Top := p.y;
    Caption := 'Label';
    Parent := Form1;
    OnMouseMove := LabelMouseMove;
  end;
end;

procedure TForm1.LabelMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var p: TPoint;
    l: TLabel;
begin
   if ssLeft in Shift then
   begin
     l := (Sender as TLabel);
     p.x := X;
     p.y := Y;
     p := l.ClientToScreen(p);
     p := ScreenToClient(p);
     l.left := p.x;
     l.Top := p.y;
   end;
end;
0
 
spiffenCommented:
And add to FormClick:
  OnMouseDown := LabelMouseDown;

Then add a new proc:
procedure TForm1.LabelMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
   FirstX := X; // Global integers.
   FirstY := Y; //
end;

To make Epsylons suggestion look even nicer. :)

Cheers..
0
 
edeyCommented:
well done eps :)  It's amazing what one can do if they take a little more time to think :).  Actually I used the mouseDown/Up solution 'cause I was thinking or adding the option to resize the label as well (how can you tell I am supposed to working on a drawing/painting app? :).

Gl
Mike

ps. say davelah are we on the right track here?
0
 
spiffenCommented:
Darn. Forgot to say that you should subtract FirstX and FirstY from the original mousemove x & y values.
But... It might be early alzheimers symptoms.
0
 
simonetCommented:
Following...
0
 
mullet_attackCommented:
Here's a simple way to drag components around at run-time. It only works with Win Controls, so instead of a label you could use a StaticText component.

procedure TForm1.StaticText1MouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
const
  SC_DragMove = $F012;
begin
  ReleaseCapture;
  (sender as TWinControl).perform(WM_SysCommand, SC_DragMove, 0);
end;
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.