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Enhance Snippet391 to allow direct calling of print method #3068

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Merged
laeubi merged 1 commit into from
Feb 6, 2026
+38 −7
Merged

Enhance Snippet391 to allow direct calling of print method #3068

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45 changes: 38 additions & 7 deletions examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet391.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ public class Snippet391 {

private static int boxSizeCm = 10;
private static boolean considerMonitorZoom = false;
private static boolean useControlPrint = false;

public static void main(String[] args) {
Display display = new Display();
Expand Down Expand Up @@ -85,6 +86,28 @@ public static void main(String[] args) {
canvas.redraw();
});

// Paint mode radio buttons
Group modeGroup = new Group(controlPanel, SWT.NONE);
modeGroup.setText("Paint Mode");
modeGroup.setLayout(new GridLayout(1, false));
GridData modeData = new GridData(SWT.FILL, SWT.CENTER, true, false);
modeData.horizontalSpan = 2;
modeGroup.setLayoutData(modeData);

Button directPaintRadio = new Button(modeGroup, SWT.RADIO);
directPaintRadio.setText("Direct Paint");
directPaintRadio.setSelection(true);

Button controlPrintRadio = new Button(modeGroup, SWT.RADIO);
controlPrintRadio.setText("Control Print");

directPaintRadio.addListener(SWT.Selection, e -> {
useControlPrint = !directPaintRadio.getSelection();
});
controlPrintRadio.addListener(SWT.Selection, e -> {
useControlPrint = controlPrintRadio.getSelection();
});

// Separator
Label separator = new Label(controlPanel, SWT.SEPARATOR | SWT.HORIZONTAL);
GridData sepData = new GridData(SWT.FILL, SWT.CENTER, true, false);
Expand All @@ -97,7 +120,7 @@ public static void main(String[] args) {
GridData printData = new GridData(SWT.FILL, SWT.CENTER, true, false);
printData.horizontalSpan = 2;
printButton.setLayoutData(printData);
printButton.addListener(SWT.Selection, e -> printToPrinter(shell));
printButton.addListener(SWT.Selection, e -> printToPrinter(shell, canvas));

// Create PDF button
Button pdfButton = new Button(controlPanel, SWT.PUSH);
Expand Down Expand Up @@ -203,7 +226,7 @@ public static void drawTestPattern(GC gc, Device device, Rectangle rect, Monitor
gc.setForeground(originalFg);
}

private static void printToPrinter(Shell shell) {
private static void printToPrinter(Shell shell, Canvas canvas) {
PrintDialog printDialog = new PrintDialog(shell);
PrinterData data = printDialog.open();
if (data == null) {
Expand All @@ -214,8 +237,12 @@ private static void printToPrinter(Shell shell) {
if (printer.startJob("Drawing Test - Snippet 391")) {
GC gc = new GC(printer);
if (printer.startPage()) {
Rectangle printArea = printer.getClientArea();
drawTestPattern(gc, printer, printArea, null);
if (useControlPrint) {
canvas.print(gc);
} else {
Rectangle printArea = printer.getClientArea();
drawTestPattern(gc, printer, printArea, null);
}
printer.endPage();
}
gc.dispose();
Expand All @@ -232,7 +259,7 @@ private static void printToPrinter(Shell shell) {
private static void createPdf(Shell shell, Canvas canvas) {
try {
String tempDir = System.getProperty("java.io.tmpdir");
String pdfPath = tempDir + "/drawing_test_snippet391.pdf";
String pdfPath = tempDir +(useControlPrint? "/drawing_test_snippet391_control.pdf":"/drawing_test_snippet391_direct.pdf");

// Use exact canvas size in points (1 point = 1 pixel at 72 DPI)
Point canvasSize = canvas.getSize();
Expand All @@ -242,8 +269,12 @@ private static void createPdf(Shell shell, Canvas canvas) {
PDFDocument pdf = new PDFDocument(pdfPath, widthPoints, heightPoints);
GC gc = new GC(pdf);

Rectangle pdfRect = new Rectangle(0, 0, canvasSize.x, canvasSize.y);
drawTestPattern(gc, pdf, pdfRect, null);
if (useControlPrint) {
canvas.print(gc);
} else {
Rectangle pdfRect = new Rectangle(0, 0, canvasSize.x, canvasSize.y);
drawTestPattern(gc, pdf, pdfRect, null);
}

gc.dispose();
pdf.dispose();
Expand Down
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