| /******************************************************************************* |
| * Copyright (c) 2000, 2012 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.cocoa.*; |
| |
| /** |
| * Instances of this class provide an etched border |
| * with an optional title. |
| * <p> |
| * Shadow styles are hints and may not be honoured |
| * by the platform. To create a group with the |
| * default shadow style for the platform, do not |
| * specify a shadow style. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the above styles may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class Group extends Composite { |
| NSView contentView; |
| String text = ""; |
| boolean ignoreResize; |
| int hMargin, vMargin; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#SHADOW_ETCHED_IN |
| * @see SWT#SHADOW_ETCHED_OUT |
| * @see SWT#SHADOW_IN |
| * @see SWT#SHADOW_OUT |
| * @see SWT#SHADOW_NONE |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Group (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| style |= SWT.NO_FOCUS; |
| /* |
| * Even though it is legal to create this widget |
| * with scroll bars, they serve no useful purpose |
| * because they do not automatically scroll the |
| * widget's client area. The fix is to clear |
| * the SWT style. |
| */ |
| return style & ~(SWT.H_SCROLL | SWT.V_SCROLL); |
| } |
| |
| @Override |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| @Override |
| public Rectangle computeTrim (int x, int y, int width, int height) { |
| checkWidget (); |
| NSBox widget = (NSBox)view; |
| NSRect newRect = new NSRect(); |
| newRect.x = x; |
| newRect.y = y; |
| newRect.width = width; |
| newRect.height = height; |
| NSRect oldRect = widget.frame(); |
| ignoreResize = true; |
| widget.setFrameFromContentFrame(newRect); |
| newRect = widget.frame(); |
| widget.setFrame(oldRect); |
| ignoreResize = false; |
| x = (int) Math.ceil(newRect.x) - hMargin; |
| y = (int) Math.ceil(newRect.y) - vMargin; |
| width = (int) Math.ceil(newRect.width) + (hMargin * 2); |
| height = (int) Math.ceil(newRect.height) + (vMargin * 2); |
| return super.computeTrim(x, y, width, height); |
| } |
| |
| @Override |
| NSView contentView () { |
| return contentView; |
| } |
| |
| @Override |
| void createHandle () { |
| state |= THEME_BACKGROUND; |
| NSBox widget = (NSBox)new SWTBox().alloc(); |
| widget.init(); |
| widget.setTitlePosition(OS.NSNoTitle); |
| NSSize margins = widget.contentViewMargins(); |
| hMargin = (int) margins.width; |
| vMargin = (int) margins.height; |
| widget.setContentViewMargins(new NSSize()); |
| |
| NSView contentWidget = (NSView)new SWTView().alloc(); |
| contentWidget.init(); |
| // contentWidget.setDrawsBackground(false); |
| widget.setContentView(contentWidget); |
| contentView = contentWidget; |
| view = widget; |
| } |
| |
| @Override |
| NSFont defaultNSFont () { |
| return display.boxFont; |
| } |
| |
| @Override |
| void deregister () { |
| super.deregister (); |
| display.removeWidget (contentView); |
| SWTBox box = (SWTBox)view; |
| display.removeWidget (box.titleCell()); |
| } |
| |
| @Override |
| void drawBackground (long id, NSGraphicsContext context, NSRect rect) { |
| if (id != view.id) return; |
| fillBackground (view, context, rect, -1); |
| } |
| |
| @Override |
| NSView eventView () { |
| return contentView; |
| } |
| |
| @Override |
| public Rectangle getClientArea () { |
| checkWidget(); |
| NSRect rect = contentView.bounds(); |
| int width = Math.max (0, (int) rect.width - hMargin * 2); |
| int height = Math.max (0, (int) rect.height - vMargin * 2); |
| return new Rectangle((int)(rect.x) + hMargin, (int)(rect.y) + vMargin, width, height); |
| } |
| |
| @Override |
| String getNameText () { |
| return getText (); |
| } |
| |
| /** |
| * Returns the receiver's text, which is the string that the |
| * is used as the <em>title</em>. If the text has not previously |
| * been set, returns an empty string. |
| * |
| * @return the text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getText () { |
| checkWidget (); |
| return text; |
| } |
| @Override |
| boolean isTransparent() { |
| return true; |
| } |
| |
| @Override |
| float getThemeAlpha () { |
| return (background != null ? 1 : 0.25f) * parent.getThemeAlpha (); |
| } |
| |
| @Override |
| void register () { |
| super.register (); |
| display.addWidget (contentView, this); |
| SWTBox box = (SWTBox)view; |
| display.addWidget (box.titleCell(), this); |
| } |
| |
| @Override |
| void releaseHandle () { |
| super.releaseHandle (); |
| if (contentView != null) contentView.release(); |
| contentView = null; |
| } |
| |
| @Override |
| void resized() { |
| if (!ignoreResize) super.resized(); |
| } |
| |
| @Override |
| void setFont(NSFont font) { |
| ((NSBox) view).setTitleFont(font); |
| } |
| |
| @Override |
| void setForeground (double [] color) { |
| NSColor nsColor; |
| if (color == null) { |
| nsColor = NSColor.textColor (); |
| } else { |
| nsColor = NSColor.colorWithDeviceRed (color[0], color[1], color[2], 1); |
| } |
| NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id); |
| cell.setTextColor (nsColor); |
| } |
| |
| @Override |
| void setOrientation () { |
| int direction = (style & SWT.RIGHT_TO_LEFT) != 0 ? OS.NSWritingDirectionRightToLeft : OS.NSWritingDirectionLeftToRight; |
| NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id); |
| cell.setBaseWritingDirection(direction); |
| } |
| |
| /** |
| * Sets the receiver's text, which is the string that will |
| * be displayed as the receiver's <em>title</em>, to the argument, |
| * which may not be null. The string may include the mnemonic character. |
| * <p> |
| * Mnemonics are indicated by an '&' that causes the next |
| * character to be the mnemonic. When the user presses a |
| * key sequence that matches the mnemonic, focus is assigned |
| * to the first child of the group. On most platforms, the |
| * mnemonic appears underlined but may be emphasised in a |
| * platform specific manner. The mnemonic indicator character |
| * '&' can be escaped by doubling it in the string, causing |
| * a single '&' to be displayed. |
| * </p><p> |
| * Note: If control characters like '\n', '\t' etc. are used |
| * in the string, then the behavior is platform dependent. |
| * </p> |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setText (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| text = string; |
| char [] buffer = new char [text.length ()]; |
| text.getChars (0, buffer.length, buffer, 0); |
| int length = fixMnemonic (buffer); |
| NSBox box = (NSBox)view; |
| box.setTitlePosition(length == 0 ? OS.NSNoTitle : OS.NSAtTop); |
| box.setTitle(NSString.stringWithCharacters(buffer, length)); |
| } |
| |
| } |