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package org.eclipse.swt.widgets;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved
*/
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>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*/
public class Group extends Composite {
int frameHandle;
String text=""; int bogus;
/**
* 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
* for all SWT widget classes should include a comment which
* describes the style constants which are applicable to the class.
* </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
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Group (Composite parent, int style) {
super (parent, checkStyle (style));
}
static int checkStyle (int style) {
/*
* 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);
}
void createHandle(int index) {
state |= HANDLE;
frameHandle = OS.gtk_frame_new(null);
if (frameHandle == 0) error (SWT.ERROR_NO_HANDLES);
boxHandle = OS.gtk_event_box_new();
if (boxHandle == 0) error (SWT.ERROR_NO_HANDLES);
handle = OS.eclipse_fixed_new();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
}
void _setHandleStyle() {
int shadow = OS.GTK_SHADOW_IN;
if ((style & SWT.SHADOW_IN) != 0) shadow = OS.GTK_SHADOW_IN;
if ((style & SWT.SHADOW_OUT) != 0) shadow = OS.GTK_SHADOW_OUT;
if ((style & SWT.SHADOW_ETCHED_IN) != 0) shadow = OS.GTK_SHADOW_ETCHED_IN;
if ((style & SWT.SHADOW_ETCHED_OUT) != 0) shadow = OS.GTK_SHADOW_ETCHED_OUT;
OS.gtk_frame_set_shadow_type(frameHandle, shadow);
}
void configure() {
parent._connectChild(frameHandle);
OS.gtk_container_add(frameHandle, boxHandle);
OS.gtk_container_add(boxHandle, handle);
}
void showHandle() {
OS.gtk_widget_show (frameHandle);
OS.gtk_widget_show (boxHandle);
OS.gtk_widget_show (handle);
OS.gtk_widget_realize (handle);
}
void register () {
super.register ();
WidgetTable.put (frameHandle, this);
}
void releaseHandle () {
super.releaseHandle ();
frameHandle = 0;
}
void releaseWidget () {
super.releaseWidget ();
text = null;
}
void deregister () {
super.deregister ();
WidgetTable.remove (frameHandle);
}
int topHandle () { return frameHandle; }
int parentingHandle() { return handle; }
/*
* === GEOMETRY ===
*/
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget ();
if (layout==null) return computeNativeSize(handle, wHint, hHint, changed);
Point size = layout.computeSize (this, wHint, hHint, changed);
if (size.x == 0) size.x = DEFAULT_WIDTH;
if (size.y == 0) size.y = DEFAULT_HEIGHT;
if (wHint != SWT.DEFAULT) size.x = wHint;
if (hHint != SWT.DEFAULT) size.y = hHint;
Rectangle trim = computeTrim (0, 0, size.x, size.y);
return new Point (trim.width, trim.height);
}
/**
* Given a desired <em>client area</em> for the receiver
* (as described by the arguments), returns the bounding
* rectangle which would be required to produce that client
* area.
* <p>
* In other words, it returns a rectangle such that, if the
* receiver's bounds were set to that rectangle, the area
* of the receiver which is capable of displaying data
* (that is, not covered by the "trimmings") would be the
* rectangle described by the arguments (relative to the
* receiver's parent).
* </p>
*
* @return the required bounds to produce the given client area
*
* @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>
*
* @see #getClientArea
*/
public Rectangle computeTrim (int x, int y, int width, int height) {
checkWidget();
int[] trims = new int[4];
OS.swt_frame_get_trim(frameHandle, trims);
return new Rectangle (x-trims[1], y-trims[0], width+trims[1]+trims[2], height+trims[0]+trims[3]);
}
public Rectangle getClientArea () {
checkWidget();
/* The Group coordinates originate at the client area */
int width, height;
Point size = _getSize();
int[] trims = new int[4];
OS.swt_frame_get_trim(frameHandle, trims);
return new Rectangle(0,0, size.x - trims[1] - trims[2], size.y - trims[0] - trims[3]);
}
/* ========= Model Logic ========= */
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;
}
/**
* 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.
*
* @param text the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener 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);
OS.gtk_frame_set_label (frameHandle, string2bytesConvertMnemonic(string));
text=string;
}
}
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