Mercurial > projects > dwt2
diff org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet226.d @ 28:69b1fa94a4a8
Added SWT snippets
author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 22 Mar 2009 15:17:04 +0100 |
parents | |
children | 4e5843b771cc |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet226.d Sun Mar 22 15:17:04 2009 +0100 @@ -0,0 +1,136 @@ +/******************************************************************************* + * Copyright (c) 2000, 2006 IBM Corporation 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: + * IBM Corporation - initial API and implementation + * D Port: + * Bill Baxter <wbaxter@gmail.com> + *******************************************************************************/ +module org.eclipse.swt.snippets.Snippet226; + +/* + * Tree example snippet: Draw a custom gradient selection + * + * For a list of all SWT example snippets see + * http://www.eclipse.org/swt/snippets/ + * + * @since 3.3 + */ +import org.eclipse.swt.SWT; +import org.eclipse.swt.graphics.GC; +import org.eclipse.swt.graphics.Rectangle; +import org.eclipse.swt.graphics.Region; +import org.eclipse.swt.graphics.Color; +import org.eclipse.swt.layout.FillLayout; +import org.eclipse.swt.widgets.Display; +import org.eclipse.swt.widgets.Shell; +import org.eclipse.swt.widgets.Tree; +import org.eclipse.swt.widgets.TreeItem; +import org.eclipse.swt.widgets.TreeColumn; +import org.eclipse.swt.widgets.Listener; +import org.eclipse.swt.widgets.Event; + +import tango.util.Convert; + +import java.lang.all; + +void main() +{ + final Display display = new Display(); + Shell shell = new Shell(display); + shell.setText("Custom gradient selection for Tree"); + shell.setLayout(new FillLayout()); + final Tree tree = new Tree(shell, SWT.MULTI | DWT.FULL_SELECTION); + tree.setHeaderVisible(true); + tree.setLinesVisible(true); + int columnCount = 4; + for (int i=0; i<columnCount; i++) { + auto istr = to!(String)(i); + TreeColumn column = new TreeColumn(tree, SWT.NONE); + column.setText("Column " ~ istr); + } + int itemCount = 3; + for (int i=0; i<itemCount; i++) { + auto istr = to!(String)(i); + TreeItem item1 = new TreeItem(tree, SWT.NONE); + item1.setText("item "~istr); + for (int c=1; c < columnCount; c++) { + auto cstr = to!(String)(c); + item1.setText(c, "item ["~istr~"-"~cstr~"]"); + } + for (int j=0; j<itemCount; j++) { + auto jstr = to!(String)(j); + TreeItem item2 = new TreeItem(item1, SWT.NONE); + item2.setText("item ["~istr~" "~jstr~"]"); + for (int c=1; c<columnCount; c++) { + auto cstr = to!(String)(c); + item2.setText(c, "item ["~istr~" "~jstr~"-"~cstr~"]"); + } + for (int k=0; k<itemCount; k++) { + auto kstr = to!(String)(k); + TreeItem item3 = new TreeItem(item2, SWT.NONE); + item3.setText("item ["~istr~" "~jstr~" "~kstr~"]"); + for (int c=1; c<columnCount; c++) { + auto cstr = to!(String)(c); + item3.setText(c, "item ["~istr~" "~jstr~" "~kstr~"-"~cstr~"]"); + } + } + } + } + + /* + * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. + * Therefore, it is critical for performance that these methods be + * as efficient as possible. + */ + tree.addListener(SWT.EraseItem, new class Listener { + public void handleEvent(Event event) { + event.detail &= ~SWT.HOT; + if ((event.detail & SWT.SELECTED) != 0) { + GC gc = event.gc; + Rectangle area = tree.getClientArea(); + /* + * If you wish to paint the selection beyond the end of + * last column, you must change the clipping region. + */ + int columnCount = tree.getColumnCount(); + if (event.index == columnCount - 1 || columnCount == 0) { + int width = area.x + area.width - event.x; + if (width > 0) { + Region region = new Region(); + gc.getClipping(region); + region.add(event.x, event.y, width, event.height); + gc.setClipping(region); + region.dispose(); + } + } + gc.setAdvanced(true); + if (gc.getAdvanced()) gc.setAlpha(127); + Rectangle rect = event.getBounds(); + Color foreground = gc.getForeground(); + Color background = gc.getBackground(); + gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); + gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND)); + gc.fillGradientRectangle(0, rect.y, 500, rect.height, false); + // restore colors for subsequent drawing + gc.setForeground(foreground); + gc.setBackground(background); + event.detail &= ~SWT.SELECTED; + } + } + }); + for (int i=0; i<columnCount; i++) { + tree.getColumn(i).pack(); + } + tree.setSelection(tree.getItem(0)); + shell.setSize(500, 200); + shell.open(); + while (!shell.isDisposed()) { + if (!display.readAndDispatch()) display.sleep(); + } + display.dispose(); +}