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Create image from Form/de

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Für die Beispiele werden folgende Units benötigt:

pascal

  ...
  
uses
  Graphics, Controls, Clipbrd, Forms, ...

  ...

Die Funktion erstellt vom übergebenen Formular einen Bildschirmausdruck (Screenshot).

pascal

  ...

uses
  Forms, Graphics, Controls, ...

  ...

Procedure subErstelleFormularImage(Formular: TForm; out Bitmap: TBitmap);
var
  Breite: Integer;
  Hoehe:  Integer;
  Rechteck: TRect;

begin

  Breite := Formular.Width;
  Hoehe := Formular.Height;
  Rechteck := Rect(0, 0, Breite, Hoehe);

  Bitmap.Width := Breite;
  Bitmap.Height := Hoehe;
  Bitmap.Canvas.CopyRect(Rechteck, Formular.Canvas, Rechteck);

end;

Demonstration, wie z. B. die obige Funktion verwendet werden kann.

pascal

  ...

uses
  Clipbrd, ...;

  ...

procedure Test;
var
  Bitmap: TBitMap;

begin

  ...

  // Fordert den Speicher für die Bitmap an
  Bitmap := TBitmap.Create;

  // Ruft die Funktion zum erstellen des Bildschirmausdrucks / Screenshots auf
  subErstelleFormularImage(Form1, Bitmap);

  // Beispiel 1: Weist den Screenschot einem Image zu
  image1.Picture.Assign(Bitmap);

  // Beispiel 2: Weist den Screenschot der Zwischenablage zu
  Clipboard.Assign(Bitmap);

  // Gibt den Speicher der Bitmap frei
  FreeAndNil(Bitmap)

  ...

end;

  ...

From the Free Pascal wiki, page "Create image from Form/de", as it stood on 2020-02-12 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.

Revision 1, last changed by WikiArchive .

Edited on wiki.freepascal.org by 4 people, 2013–2020

From the official wiki's backup of 26 May 2024: who edited this page there, and when. Edits made there after that date were not recorded, and the earlier versions are not shown here; the main page says why.

WhenWhoWhat changed
OlafCreated page
Olaf (minor)
Olaf (minor)
Michl
Michl
FTurtle
TrevFixed syntax highlighting; deleted category already in page template (minor)

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