Create image from Form/de: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: Create image from Form/de
| Old | New | Line | |
|---|---|---|---|
| 1 | + | Für die Beispiele werden folgende [[Unit/de|Units]] benötigt: | |
| 2 | + | ||
| 3 | + | ``` pascal | |
| 4 | + | ||
| 5 | + | ... | |
| 6 | + | ||
| 7 | + | uses | |
| 8 | + | Graphics, Controls, Clipbrd, Forms, ... | |
| 9 | + | ||
| 10 | + | ... | |
| 11 | + | ||
| 12 | + | ``` | |
| 13 | + | ||
| 14 | + | Die Funktion erstellt vom übergebenen [[TForm/de|Formular]] einen Bildschirmausdruck (Screenshot). | |
| 15 | + | ||
| 16 | + | ``` pascal | |
| 17 | + | ||
| 18 | + | ... | |
| 19 | + | ||
| 20 | + | uses | |
| 21 | + | Forms, Graphics, Controls, ... | |
| 22 | + | ||
| 23 | + | ... | |
| 24 | + | ||
| 25 | + | Procedure subErstelleFormularImage(Formular: TForm; out Bitmap: TBitmap); | |
| 26 | + | var | |
| 27 | + | Breite: Integer; | |
| 28 | + | Hoehe: Integer; | |
| 29 | + | Rechteck: TRect; | |
| 30 | + | ||
| 31 | + | begin | |
| 32 | + | ||
| 33 | + | Breite := Formular.Width; | |
| 34 | + | Hoehe := Formular.Height; | |
| 35 | + | Rechteck := Rect(0, 0, Breite, Hoehe); | |
| 36 | + | ||
| 37 | + | Bitmap.Width := Breite; | |
| 38 | + | Bitmap.Height := Hoehe; | |
| 39 | + | Bitmap.Canvas.CopyRect(Rechteck, Formular.Canvas, Rechteck); | |
| 40 | + | ||
| 41 | + | end; | |
| 42 | + | ``` | |
| 43 | + | ||
| 44 | + | Demonstration, wie z. B. die obige Funktion verwendet werden kann. | |
| 45 | + | ||
| 46 | + | ``` pascal | |
| 47 | + | ||
| 48 | + | ... | |
| 49 | + | ||
| 50 | + | uses | |
| 51 | + | Clipbrd, ...; | |
| 52 | + | ||
| 53 | + | ... | |
| 54 | + | ||
| 55 | + | procedure Test; | |
| 56 | + | var | |
| 57 | + | Bitmap: TBitMap; | |
| 58 | + | ||
| 59 | + | begin | |
| 60 | + | ||
| 61 | + | ... | |
| 62 | + | ||
| 63 | + | // Fordert den Speicher für die Bitmap an | |
| 64 | + | Bitmap := TBitmap.Create; | |
| 65 | + | ||
| 66 | + | // Ruft die Funktion zum erstellen des Bildschirmausdrucks / Screenshots auf | |
| 67 | + | subErstelleFormularImage(Form1, Bitmap); | |
| 68 | + | ||
| 69 | + | // Beispiel 1: Weist den Screenschot einem Image zu | |
| 70 | + | image1.Picture.Assign(Bitmap); | |
| 71 | + | ||
| 72 | + | // Beispiel 2: Weist den Screenschot der Zwischenablage zu | |
| 73 | + | Clipboard.Assign(Bitmap); | |
| 74 | + | ||
| 75 | + | // Gibt den Speicher der Bitmap frei | |
| 76 | + | FreeAndNil(Bitmap) | |
| 77 | + | ||
| 78 | + | ... | |
| 79 | + | ||
| 80 | + | end; | |
| 81 | + | ||
| 82 | + | ... | |
| 83 | + | ``` | |
| 84 | + | ||
| 85 | + | --- | |
| 86 | + | *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](/wiki-contact).* |
