Mercurial > projects > dwt2
diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/custom/ScrolledCompositeLayout.d @ 0:6dd524f61e62
add dwt win and basic java stuff
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 02 Mar 2009 14:44:16 +0100 |
parents | |
children | 6bf2837c50fe |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/custom/ScrolledCompositeLayout.d Mon Mar 02 14:44:16 2009 +0100 @@ -0,0 +1,122 @@ +/******************************************************************************* + * 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 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; + +import Math = tango.math.Math; + +/** + * This class provides the layout for ScrolledComposite + * + * @see ScrolledComposite + */ +class ScrolledCompositeLayout : Layout { + + bool inLayout = false; + static final int DEFAULT_WIDTH = 64; + static final 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; +} +}