scale QR code to fit, cf. #115

1 files changed, 18 insertions, 2 deletions

diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/MobileBKUQRComposite.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/MobileBKUQRComposite.java
index ad9cb530..2525d3ba 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/MobileBKUQRComposite.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/MobileBKUQRComposite.java
@@ -27,6 +27,7 @@ import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;

 import org.eclipse.swt.graphics.Image;

 import org.eclipse.swt.graphics.ImageData;

+import org.eclipse.swt.graphics.Point;

 import org.eclipse.swt.graphics.Rectangle;

 import org.eclipse.swt.layout.FormLayout;

 import org.eclipse.swt.program.Program;

@@ -100,6 +101,8 @@ public class MobileBKUQRComposite extends StateComposite {
 

 	private String refVal;

 

+	private ImageData currentQRImage;

+

 	private String signatureData;

 

 	/**

@@ -202,7 +205,19 @@ public class MobileBKUQRComposite extends StateComposite {
 		} else {

 			this.lblRefVal.setText("");

 		}

+	}

 

+	private void updateQRImage() {

+		if (this.currentQRImage == null)

+			return;

+

+		Point availableSize = this.lblQR.getSize();

+		int targetSize = Math.min(availableSize.x, availableSize.y);

+		log.info("target size {}", targetSize);

+		if (targetSize <= 0)

+			return;

+		

+		this.lblQR.setImage(new Image(this.lblQR.getDisplay(), this.currentQRImage.scaledTo(targetSize, targetSize)));

 	}

 

 	/**

@@ -214,8 +229,8 @@ public class MobileBKUQRComposite extends StateComposite {
 			setErrorMessage(Messages.getString("error.FailedToLoadQRCode"));

 			return;

 		}

-		Image qr = new Image(Display.getCurrent(), qrcode);

-		this.lblQR.setImage(qr);

+		this.currentQRImage = new ImageData(qrcode);

+		updateQRImage();

 	}

 

 	/**

@@ -293,6 +308,7 @@ public class MobileBKUQRComposite extends StateComposite {
 		this.lblQRLabel.setAlignment(SWT.RIGHT);

 

 		this.lblQR = new Label(containerComposite, SWT.NATIVE);

+		this.lblQR.addListener(SWT.Resize, (e) -> { updateQRImage(); });

 

 		this.lnk_sig_data = new Link(containerComposite, SWT.NATIVE | SWT.RESIZE);

 		SWTUtils.anchor(lnk_sig_data).right(100, -20).top(0, 20).set();