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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java')
-rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java new file mode 100644 index 0000000000..f2b75d007c --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java @@ -0,0 +1,292 @@ +/******************************************************************************* + * Copyright (c) 2000, 2009 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 + *******************************************************************************/ +package org.eclipse.swt.widgets; + + +import org.eclipse.swt.*; +import org.eclipse.swt.internal.*; +import org.eclipse.swt.internal.gtk.*; +import org.eclipse.swt.graphics.*; + +/** + * 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 { + int /*long*/ clientHandle, labelHandle; + String text = ""; + +/** + * 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); +} + +protected void checkSubclass () { + if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); +} + +int /*long*/ clientHandle () { + return clientHandle; +} + +public Point computeSize (int wHint, int hHint, boolean changed) { + Point size = super.computeSize(wHint, hHint, changed); + int width = computeNativeSize (handle, SWT.DEFAULT, SWT.DEFAULT, false).x; + size.x = Math.max (size.x, width); + return size; +} +public Rectangle computeTrim (int x, int y, int width, int height) { + checkWidget(); + forceResize (); + int clientX = OS.GTK_WIDGET_X (clientHandle); + int clientY = OS.GTK_WIDGET_Y (clientHandle); + x -= clientX; + y -= clientY; + width += clientX + clientX; + height += clientX + clientY; + return new Rectangle (x, y, width, height); +} + +void createHandle(int index) { + state |= HANDLE | THEME_BACKGROUND; + fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); + if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES); + OS.gtk_fixed_set_has_window (fixedHandle, true); + handle = OS.gtk_frame_new (null); + if (handle == 0) error (SWT.ERROR_NO_HANDLES); + labelHandle = OS.gtk_label_new (null); + if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES); + OS.g_object_ref (labelHandle); + OS.gtk_object_sink (labelHandle); + clientHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); + if (clientHandle == 0) error (SWT.ERROR_NO_HANDLES); + OS.gtk_container_add (fixedHandle, handle); + OS.gtk_container_add (handle, clientHandle); + if ((style & SWT.SHADOW_IN) != 0) { + OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_IN); + } + if ((style & SWT.SHADOW_OUT) != 0) { + OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_OUT); + } + if ((style & SWT.SHADOW_ETCHED_IN) != 0) { + OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_IN); + } + if ((style & SWT.SHADOW_ETCHED_OUT) != 0) { + OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_OUT); + } +} + +void deregister () { + super.deregister (); + display.removeWidget (clientHandle); + display.removeWidget (labelHandle); +} + +void enableWidget (boolean enabled) { + OS.gtk_widget_set_sensitive (labelHandle, enabled); +} + +int /*long*/ eventHandle () { + return fixedHandle; +} + +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; +} + +void hookEvents () { + super.hookEvents(); + if (labelHandle != 0) { + OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false); + } +} + +boolean mnemonicHit (char key) { + if (labelHandle == 0) return false; + boolean result = super.mnemonicHit (labelHandle, key); + if (result) setFocus (); + return result; +} + +boolean mnemonicMatch (char key) { + if (labelHandle == 0) return false; + return mnemonicMatch (labelHandle, key); +} + +int /*long*/ parentingHandle() { + return fixedHandle; +} + +void register () { + super.register (); + display.addWidget (clientHandle, this); + display.addWidget (labelHandle, this); +} + +void releaseHandle () { + super.releaseHandle (); + clientHandle = labelHandle = 0; +} + +void releaseWidget () { + super.releaseWidget (); + if (labelHandle != 0) OS.g_object_unref (labelHandle); + text = null; +} + +void setBackgroundColor (GdkColor color) { + super.setBackgroundColor (color); + setBackgroundColor(fixedHandle, color); +} + +void setFontDescription (int /*long*/ font) { + super.setFontDescription (font); + OS.gtk_widget_modify_font (labelHandle, font); +} + +void setForegroundColor (GdkColor color) { + super.setForegroundColor (color); + setForegroundColor (labelHandle, color); +} + +void setOrientation () { + super.setOrientation (); + if ((style & SWT.RIGHT_TO_LEFT) != 0) { + OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL); + } +} + +/** + * 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> + * @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 [] chars = fixMnemonic (string); + byte [] buffer = Converter.wcsToMbcs (null, chars, true); + OS.gtk_label_set_text_with_mnemonic (labelHandle, buffer); + if (string.length () != 0) { + if (OS.gtk_frame_get_label_widget (handle) == 0) { + OS.gtk_frame_set_label_widget (handle, labelHandle); + } + } else { + OS.gtk_frame_set_label_widget (handle, 0); + } +} + +void showWidget () { + super.showWidget (); + if (clientHandle != 0) OS.gtk_widget_show (clientHandle); + if (labelHandle != 0) OS.gtk_widget_show (labelHandle); +} +} |