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Форум программистов > Delphi: Звук, графика и видео > Show a text progressiv as typed with a typewriter (horizontal/vertical)


Автор: Poseidon 19.5.2005, 00:43
Код
{ 
 To make this code to work you would need 2 images, 
 one for the horizontal- and another for the vertical text. 
} 

// VerticalTypewriter ( <Text>, <Image to write to>, <Time to delay between every chars> ) 
procedure VerticalTypewriter(text: string; image: timage; delay: integer); 
var 
 x,y,i: integer; 
begin 
 image.Canvas.Refresh; 
 application.ProcessMessages; 
 y := 1; 

 for i := 1 to length(text) do begin 
  application.ProcessMessages; 
  y := y+image.Canvas.TextHeight(text[i]); 
  x := image.width div 2 - (image.Canvas.TextWidth(text[i]) div 2); 
  image.Canvas.TextOut(x,y,text[i]); 
  sleep(delay); 
 end; 

end; 

// Horizontal Typewriter ( <Text>, <Image to write to>, <Time to delay between every chars>, <Space between chars>) 
procedure HorizontalTypewriter(text: string; image: timage; delay, space: integer); 
var 
 x,y,i: integer; 
begin 
 image.Canvas.Refresh; 
 application.ProcessMessages; 
 x := 1; 

 for i := 1 to length(text) do begin 
  application.ProcessMessages; 
  y := image.Picture.Height div 2 - (image.Canvas.TextHeight(text[i]) div 2); 
  x := x+image.Canvas.TextWidth(text[i])+space; 
  image.Canvas.TextOut(x,y,text[i]); 
  sleep(delay); 
 end; 

end; 


// Sample calls: 
procedure TForm1.Button1Click(Sender: TObject); 
begin 
 //                  <text>          <image>  <delay> 
 VerticalTypewriter('HELLO BIG-X',   image1,  100     ); 
end; 

procedure TForm1.Button2Click(Sender: TObject); 
begin 
 //                    <text>         <image>  <delay>  <space> 
 HorizontalTypewriter('Hello Big-X',  image2,  100,     1       ); 
end; 

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