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-rw-r--r--tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug475784_TransparentComposite.java248
1 files changed, 248 insertions, 0 deletions
diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug475784_TransparentComposite.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug475784_TransparentComposite.java
new file mode 100644
index 0000000000..800ad78429
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug475784_TransparentComposite.java
@@ -0,0 +1,248 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Red Hat and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Red Hat - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.tests.gtk.snippets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Path;
+import org.eclipse.swt.graphics.PathData;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.graphics.Region;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+
+public class Bug475784_TransparentComposite extends Shell
+{
+ public static int RADIUS_OF_ROUND_EDGES = 30;
+
+ /**
+ * Launch the application.
+ * @param args
+ */
+ public static void main(String args[])
+ {
+ try
+ {
+ Display display = Display.getDefault();
+ Bug475784_TransparentComposite shell = new Bug475784_TransparentComposite(display);
+ shell.open();
+ shell.layout();
+ while (!shell.isDisposed())
+ {
+ if (!display.readAndDispatch())
+ {
+ display.sleep();
+ }
+ }
+ }
+ catch (Exception e)
+ {
+ e.printStackTrace();
+ }
+ }
+
+ /**
+ * Create the shell.
+ * @param display
+ */
+ public Bug475784_TransparentComposite(final Display display)
+ {
+ super(display, SWT.SHELL_TRIM);
+ setLayout(new GridLayout(1, false));
+ final Composite composite = new Composite(this, SWT.NONE);
+ composite.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
+ composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
+ composite.setLayout(new GridLayout(1, false));
+ //overlay composite
+ final Composite overlay = new Composite(composite, SWT.NO_BACKGROUND | SWT.NO_FOCUS);
+ overlay.setLayout(new FillLayout());
+ overlay.setVisible(false);
+ //label
+ Label textLabel = new Label(composite, SWT.NONE);
+ textLabel.setText("Hello World!\nHello World!");
+ Button btnCheckButton = new Button(composite, SWT.CHECK);
+ btnCheckButton.setText("Check Button");
+ Button btnRadioButton = new Button(composite, SWT.RADIO);
+ btnRadioButton.setText("Radio Button");
+ //Composite for drawings
+ Composite compDraws = new Composite(composite, SWT.NONE);
+ compDraws.addPaintListener(e -> {
+ e.gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
+ e.gc.fillArc(0, 0, 50, 50, 0, 360);
+ });
+ //exclude overlay composite
+ GridData gData = new GridData();
+ gData.exclude = true;
+ overlay.setLayoutData(gData);
+ //set region
+ Region reg = new Region();
+ getRegionForRoundRectangle(reg, 0, 0, 200, 200, RADIUS_OF_ROUND_EDGES);
+ overlay.setRegion(reg);
+ reg.dispose();
+ //toggle overlay button
+ final Button btnNewButton = new Button(composite, SWT.NONE);
+ btnNewButton.setLayoutData(new GridData(SWT.LEFT, SWT.BOTTOM, false, true, 1, 1));
+ btnNewButton.setText("Toggle overlay");
+ GridData gdDataButton = new GridData(GridData.VERTICAL_ALIGN_END);
+ gdDataButton.horizontalAlignment = SWT.LEFT;
+ gdDataButton.verticalAlignment = SWT.BOTTOM;
+ gdDataButton.grabExcessVerticalSpace = true;
+ btnNewButton.setLayoutData(gdDataButton);
+ btnNewButton.addSelectionListener(new SelectionAdapter()
+ {
+ @Override
+ public void widgetSelected(SelectionEvent e)
+ {
+ int width = composite.getSize().x;
+ int height = composite.getSize().y - btnNewButton.getSize().y - 10;
+ overlay.setSize(width, height);
+ overlay.setVisible(!overlay.isVisible());
+ }
+ });
+ overlay.moveAbove(null);
+ overlay.addPaintListener(e -> {
+ e.gc.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_YELLOW));
+ e.gc.setAlpha(150);
+ e.gc.fillRectangle(new Rectangle(0, 0, overlay.getSize().x, overlay.getSize().y));
+ });
+ createContents();
+ }
+
+ /**
+ * Create contents of the shell.
+ */
+ protected void createContents()
+ {
+ setText("SWT Application");
+ setSize(450, 300);
+ }
+
+ @Override
+ protected void checkSubclass()
+ {
+ // Disable the check that prevents subclassing of SWT components
+ }
+
+ public static void getCircleRegion(Region region, int r, int offsetX, int offsetY)
+ {
+ int[] polygon = new int[8 * r + 4];
+ // x^2 + y^2 = r^2
+ for (int i = 0; i < 2 * r + 1; i++)
+ {
+ int x = i - r;
+ int y = (int) Math.sqrt(r * r - x * x);
+ polygon[2 * i] = offsetX + x;
+ polygon[2 * i + 1] = offsetY + y;
+ polygon[8 * r - 2 * i - 2] = offsetX + x;
+ polygon[8 * r - 2 * i - 1] = offsetY - y;
+ }
+ region.add(polygon);
+ }
+
+ public static void drawRoundFrame(GC gc, int width, int height)
+ {
+ Rectangle tmpClippingRect = gc.getClipping();
+ Region reg = new Region();
+ gc.getClipping(reg);
+ Region roundReg = new Region();
+ getRegionForRoundRectangle(roundReg, 1, 1, width, height, RADIUS_OF_ROUND_EDGES - 1);
+ reg.subtract(roundReg);
+ gc.setClipping(reg);
+ gc.fillRectangle(0, 0, width + 1, height + 1);
+ reg.dispose();
+ roundReg.dispose();
+ gc.setClipping(tmpClippingRect);
+ }
+
+ public static void loadPath(Region region, float[] points, byte[] types)
+ {
+ int start = 0, end = 0;
+ for (int i = 0; i < types.length; i++)
+ {
+ switch (types[i])
+ {
+ case SWT.PATH_MOVE_TO:
+ {
+ if (start != end)
+ {
+ int n = 0;
+ int[] temp = new int[end - start];
+ for (int k = start; k < end; k++)
+ {
+ temp[n++] = Math.round(points[k]);
+ }
+ region.add(temp);
+ }
+ start = end;
+ end += 2;
+ break;
+ }
+ case SWT.PATH_LINE_TO:
+ {
+ end += 2;
+ break;
+ }
+ case SWT.PATH_CLOSE:
+ {
+ if (start != end)
+ {
+ int n = 0;
+ int[] temp = new int[end - start];
+ for (int k = start; k < end; k++)
+ {
+ temp[n++] = Math.round(points[k]);
+ }
+ region.add(temp);
+ }
+ start = end;
+ break;
+ }
+ }
+ }
+ }
+
+ public static Path getPathForRoundRectangle(int x, int y, int width, int height, int r)
+ {
+ Path path = new Path(Display.getDefault());
+ path.addArc(x, y, 2 * r, 2 * r, 0, 360);
+ path.addArc(width - 2 * r, y, 2 * r, 2 * r, 0, 360);
+ path.addArc(x, height - 2 * r, 2 * r, 2 * r, 0, 360);
+ path.addArc(width - 2 * r, height - 2 * r, 2 * r, 2 * r, 0, 360);
+ path.addRectangle(x, r - y, width - x, height - 2 * r);
+ path.addRectangle(r - x, y, width - 2 * r, height - y);
+ Path path2 = new Path(Display.getDefault(), path, 0.0001f);
+ path.dispose();
+ return path2;
+ }
+
+ public static void drawRoundRectangleByPath(GC gc, int x, int y, int width, int height)
+ {
+ Path path = getPathForRoundRectangle(x, y, width, height, RADIUS_OF_ROUND_EDGES - 1);
+ gc.drawPath(path);
+ path.dispose();
+ }
+
+ public static void getRegionForRoundRectangle(Region reg, int x, int y, int width, int height, int r)
+ {
+ Path tmpPath = getPathForRoundRectangle(x, y, width, height, r);
+ PathData data = tmpPath.getPathData();
+ tmpPath.dispose();
+ loadPath(reg, data.points, data.types);
+ }
+} \ No newline at end of file

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