Mercurial > projects > dwt-samples
view snippets/tree/Snippet226.d @ 94:799099686955
New tree snippet ports
author | Bill Baxter <bill@billbaxter.com> |
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date | Thu, 22 May 2008 13:47:53 +0900 |
parents | |
children | 1f0a7a472680 |
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/******************************************************************************* * 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 snippets.tree.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 dwt.DWT; import dwt.graphics.GC; import dwt.graphics.Rectangle; import dwt.graphics.Region; import dwt.graphics.Color; import dwt.layout.FillLayout; import dwt.widgets.Display; import dwt.widgets.Shell; import dwt.widgets.Tree; import dwt.widgets.TreeItem; import dwt.widgets.TreeColumn; import dwt.widgets.Listener; import dwt.widgets.Event; import tango.util.Convert; import dwt.dwthelper.utils; 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, DWT.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, DWT.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, DWT.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, DWT.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, DWT.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(DWT.EraseItem, new class Listener { public void handleEvent(Event event) { event.detail &= ~DWT.HOT; if ((event.detail & DWT.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(DWT.COLOR_RED)); gc.setBackground(display.getSystemColor(DWT.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 &= ~DWT.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(); }