Title: Sliding text
Question: Simple system in order to move a text within a form
Answer:
unit Move_text;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure Render(Sender: TObject; var Done: Boolean);
procedure FormResize(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
var
offbmp: TBitmap;
Time, xx: Integer;
{$R *.DFM}
procedure TForm1.Render(Sender: TObject; var Done: Boolean);
begin
Time := (Time + 1) mod 100;
if Time = 0 then
begin
Inc(xx);
Canvas.lock;
with OffBmp.Canvas do
begin
Brush.Color := clYellow;
Brush.Style := bsSolid;
FillRect(bounds(0, 0, Width, Height));
Font.Name := 'Arial black';
Font.Size := Form1.Height div 8;
Font.Color := clRed;
Brush.Style := bsClear;
TextOut(Form1.Width - xx, 0, 'WWW.Delphiruby.com!');
end;
Application.ProcessMessages;
Canvas.draw(0, 0, offbmp);
// canvas.CopyRect(bounds(0,0,width,height),
// offbmp.canvas,bounds(0,0,width,height));
// canvas.bitbl
end;
Done := False;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
offbmp := TBitmap.Create;
offbmp.Width := Form1.Width;
offbmp.Height := Form1.Height;
with OffBmp do
begin
Canvas.Brush.Color := clBlack;
Canvas.FillRect(bounds(0, 0, Width, Height));
end;
Application.OnIdle := render;
end;
procedure TForm1.FormResize(Sender: TObject);
begin
offbmp.Width := Form1.Width;
offbmp.Height := Form1.Height;
with OffBmp do
begin
Canvas.Brush.Color := clBlack;
Canvas.FillRect(bounds(0, 0, Width, Height));
end;
end;
end.