| /******************************************************************************* |
| * Copyright (c) 2018 Red Hat and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Red Hat - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.gtk.snippets; |
| |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.MouseEvent; |
| import org.eclipse.swt.events.MouseMoveListener; |
| import org.eclipse.swt.events.MouseTrackListener; |
| import org.eclipse.swt.events.PaintEvent; |
| import org.eclipse.swt.events.PaintListener; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Canvas; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Sash; |
| import org.eclipse.swt.widgets.Shell; |
| |
| public class Bug218935_SashFlicker { |
| private class CursorListener implements MouseMoveListener, MouseTrackListener { |
| private Bug218935_SashFlicker main; |
| |
| public CursorListener(Bug218935_SashFlicker main) { |
| this.main = main; |
| } |
| |
| @Override |
| public void mouseMove(MouseEvent e) { |
| main.setCursor(e.x); |
| } |
| |
| @Override |
| public void mouseEnter(MouseEvent e) { |
| main.setVisible(true); |
| } |
| |
| @Override |
| public void mouseExit(MouseEvent e) { |
| main.setVisible(false); |
| } |
| |
| @Override |
| public void mouseHover(MouseEvent e) { |
| } |
| } |
| |
| public Bug218935_SashFlicker() { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setBounds(10, 10, 400, 400); |
| shell.setText("GTK Sash flicker"); |
| shell.setLayout(new FillLayout()); |
| |
| Composite composite = new Composite(shell, SWT.NO_BACKGROUND); |
| composite.setBackground(display.getSystemColor(SWT.COLOR_GRAY)); |
| |
| GridLayout gridLayout = new GridLayout(1, true); |
| gridLayout.marginWidth = 0; |
| gridLayout.marginHeight = 0; |
| gridLayout.horizontalSpacing = 0; |
| gridLayout.verticalSpacing = 0; |
| composite.setLayout(gridLayout); |
| |
| composite.addPaintListener(new PaintListener() { |
| @Override |
| public void paintControl(PaintEvent e) { |
| e.gc.fillRectangle(e.x, e.y, e.width, e.height); |
| } |
| }); |
| |
| |
| Canvas canvas = new Canvas(composite, SWT.None); |
| canvas.setBackground(display.getSystemColor(SWT.COLOR_WHITE)); |
| |
| canvas.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false, 1, 1)); |
| |
| canvas.addPaintListener(new PaintListener() { |
| @Override |
| public void paintControl(PaintEvent e) { |
| e.gc.fillRectangle(e.x, e.y, e.width, e.height); |
| } |
| }); |
| |
| Sash sash = new Sash(composite, SWT.NO_BACKGROUND); |
| sash.setBackground(display.getSystemColor(SWT.COLOR_CYAN)); |
| |
| final GridData sashData = new GridData(SWT.FILL, SWT.BOTTOM, true, false, 1, 1); |
| sashData.heightHint = 40; |
| sash.setLayoutData(sashData); |
| |
| sash.addPaintListener(new PaintListener() { |
| @Override |
| public void paintControl(PaintEvent e) { |
| System.err.println(e); |
| e.gc.fillRectangle(e.x, e.y, e.width, e.height); |
| } |
| }); |
| |
| createCursor(composite); |
| |
| CursorListener cursorListener = new CursorListener(this); |
| canvas.addMouseMoveListener(cursorListener); |
| canvas.addMouseTrackListener(cursorListener); |
| |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| |
| display.dispose(); |
| } |
| |
| |
| /** |
| * @param args |
| */ |
| public static void main(String[] args) { |
| new Bug218935_SashFlicker(); |
| } |
| |
| private Canvas cursorLine; |
| |
| private void createCursor(Composite parent) { |
| cursorLine = new Canvas(parent, SWT.NO_BACKGROUND); |
| cursorLine.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_RED)); |
| |
| final GridData cursorLineData = new GridData(); |
| cursorLineData.exclude = true; |
| cursorLine.setLayoutData(cursorLineData); |
| |
| cursorLine.setSize(1, Integer.MAX_VALUE); |
| cursorLine.setVisible(false); |
| cursorLine.setEnabled(false); |
| |
| cursorLine.addPaintListener(new PaintListener() { |
| @Override |
| public void paintControl(PaintEvent e) { |
| Canvas w = ((Canvas)e.widget); |
| Point p = w.getSize(); |
| e.gc.drawRectangle(0, 0, p.x, p.y); |
| } |
| }); |
| } |
| |
| |
| void setVisible(boolean visible) { |
| cursorLine.setVisible(visible); |
| |
| if (visible) { |
| //Place the cursor above all widgets |
| cursorLine.moveAbove(null); |
| } |
| } |
| |
| |
| void setCursor(int x) { |
| cursorLine.setLocation(x, 0); |
| cursorLine.getParent().update(); |
| } |
| } |