Mercurial > projects > dwt2
view org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/custom/ScrolledCompositeLayout.d @ 104:88652073d1c2
More work on icu
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 02 May 2009 11:27:24 +0200 |
parents | 7a2dd761a8b2 |
children | 536e43f63c81 |
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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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.swt.custom.ScrolledCompositeLayout; import java.lang.all; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Layout; import org.eclipse.swt.widgets.ScrollBar; import org.eclipse.swt.custom.ScrolledComposite; /** * This class provides the layout for ScrolledComposite * * @see ScrolledComposite */ class ScrolledCompositeLayout : Layout { bool inLayout = false; static const int DEFAULT_WIDTH = 64; static const int DEFAULT_HEIGHT = 64; protected override Point computeSize(Composite composite, int wHint, int hHint, bool flushCache) { ScrolledComposite sc = cast(ScrolledComposite)composite; Point size = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT); if (sc.content !is null) { Point preferredSize = sc.content.computeSize(wHint, hHint, flushCache); Point currentSize = sc.content.getSize(); size.x = sc.getExpandHorizontal() ? preferredSize.x : currentSize.x; size.y = sc.getExpandVertical() ? preferredSize.y : currentSize.y; } size.x = Math.max(size.x, sc.minWidth); size.y = Math.max(size.y, sc.minHeight); if (wHint !is SWT.DEFAULT) size.x = wHint; if (hHint !is SWT.DEFAULT) size.y = hHint; return size; } protected override bool flushCache(Control control) { return true; } protected override void layout(Composite composite, bool flushCache) { if (inLayout) return; ScrolledComposite sc = cast(ScrolledComposite)composite; if (sc.content is null) return; ScrollBar hBar = sc.getHorizontalBar(); ScrollBar vBar = sc.getVerticalBar(); if (hBar !is null) { if (hBar.getSize().y >= sc.getSize().y) { return; } } if (vBar !is null) { if (vBar.getSize().x >= sc.getSize().x) { return; } } inLayout = true; Rectangle contentRect = sc.content.getBounds(); if (!sc.alwaysShowScroll) { bool hVisible = sc.needHScroll(contentRect, false); bool vVisible = sc.needVScroll(contentRect, hVisible); if (!hVisible && vVisible) hVisible = sc.needHScroll(contentRect, vVisible); if (hBar !is null) hBar.setVisible(hVisible); if (vBar !is null) vBar.setVisible(vVisible); } Rectangle hostRect = sc.getClientArea(); if (sc.expandHorizontal) { contentRect.width = Math.max(sc.minWidth, hostRect.width); } if (sc.expandVertical) { contentRect.height = Math.max(sc.minHeight, hostRect.height); } if (hBar !is null) { hBar.setMaximum (contentRect.width); hBar.setThumb (Math.min (contentRect.width, hostRect.width)); int hPage = contentRect.width - hostRect.width; int hSelection = hBar.getSelection (); if (hSelection >= hPage) { if (hPage <= 0) { hSelection = 0; hBar.setSelection(0); } contentRect.x = -hSelection; } } if (vBar !is null) { vBar.setMaximum (contentRect.height); vBar.setThumb (Math.min (contentRect.height, hostRect.height)); int vPage = contentRect.height - hostRect.height; int vSelection = vBar.getSelection (); if (vSelection >= vPage) { if (vPage <= 0) { vSelection = 0; vBar.setSelection(0); } contentRect.y = -vSelection; } } sc.content.setBounds (contentRect); inLayout = false; } }