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package org.eclipse.swt.widgets;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved
*/
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.motif.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.*;
/**
* 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 /*final*/ class Group extends Composite {
int labelHandle;
/**
* Creates a new instance of the widget.
*/
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);
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
public Rectangle computeTrim (int x, int y, int width, int height) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
int trimX, trimY, trimWidth, trimHeight;
int [] argList = {
OS.XmNwidth, 0,
OS.XmNheight, 0,
OS.XmNshadowThickness, 0,
OS.XmNmarginWidth, 0,
OS.XmNmarginHeight, 0
};
OS.XtGetValues (handle, argList, argList.length / 2);
int thickness = argList [5];
int marginWidth = argList [7];
int marginHeight = argList [9];
trimX = x - marginWidth + thickness;
trimY = y - marginHeight + thickness;
trimWidth = width + ((marginWidth + thickness) * 2);
trimHeight = height + ((marginHeight + thickness) * 2);
if (OS.XtIsManaged (labelHandle)) {
int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
int labelHeight = ((short) argList2 [1]) + argList2 [3];
trimY = y - labelHeight;
trimHeight = height + labelHeight + (marginHeight + thickness);
}
return new Rectangle (trimX, trimY, trimWidth, trimHeight);
}
void createHandle (int index) {
state |= HANDLE;
/*
* Feature in Motif. When a widget is managed or unmanaged,
* it may request and be granted, a new size in the OS. This
* behavior is unwanted. The fix is to create a parent for
* the list that will disallow geometry requests.
*/
int border = (style & SWT.BORDER) != 0 ? 1 : 0;
int [] argList1 = {
OS.XmNancestorSensitive, 1,
OS.XmNborderWidth, border,
};
int parentHandle = parent.handle;
formHandle = OS.XmCreateForm (parentHandle, null, argList1, argList1.length / 2);
if (formHandle == 0) error (SWT.ERROR_NO_HANDLES);
int [] argList2 = {
OS.XmNshadowType, shadowType (),
OS.XmNtopAttachment, OS.XmATTACH_FORM,
OS.XmNbottomAttachment, OS.XmATTACH_FORM,
OS.XmNleftAttachment, OS.XmATTACH_FORM,
OS.XmNrightAttachment, OS.XmATTACH_FORM,
OS.XmNresizable, 0,
};
handle = OS.XmCreateFrame (formHandle, null, argList2, argList2.length / 2);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
int [] argList3 = {OS.XmNchildType, OS.XmFRAME_TITLE_CHILD};
labelHandle = OS.XmCreateLabel (handle, null, argList3, argList3.length / 2);
if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES);
}
void createWidget (int index) {
super.createWidget (index);
/*
* Bug in Motif. For some reason, if a form has not been realized,
* calling XtResizeWidget () on the form does not lay out properly.
* The fix is to force the widget to be realized by forcing the shell
* to be realized.
*/
getShell ().realizeWidget ();
}
void enableWidget (boolean enabled) {
super.enableWidget (enabled);
enableHandle (enabled, labelHandle);
}
int fontHandle () {
return labelHandle;
}
public Rectangle getClientArea () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
int [] argList = {
OS.XmNwidth, 0,
OS.XmNheight, 0,
OS.XmNshadowThickness, 0,
OS.XmNmarginWidth, 0,
OS.XmNmarginHeight, 0
};
OS.XtGetValues (handle, argList, argList.length / 2);
int thickness = argList [5];
int marginWidth = argList [7];
int marginHeight = argList [9];
int x = marginWidth + thickness;
int y = marginHeight + thickness;
int width = argList [1] - ((marginWidth + thickness) * 2) - 1;
int height = argList [3] - ((marginHeight + thickness) * 2) - 1;
if (OS.XtIsManaged (labelHandle)) {
int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
y = ((short) argList2 [1]) + argList2 [3];
height = argList [3] - y - (marginHeight + thickness) - 1;
}
return new Rectangle (x, y, width, height);
}
/**
* 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 () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
int [] argList = {OS.XmNlabelString, 0};
OS.XtGetValues (labelHandle, argList, 1);
int xmString = argList [1];
int address = OS.XmStringUnparse (
xmString,
null,
OS.XmCHARSET_TEXT,
OS.XmCHARSET_TEXT,
null,
0,
OS.XmOUTPUT_ALL);
if (address == 0) return "";
int length = OS.strlen (address);
byte [] buffer = new byte [length];
OS.memmove (buffer, address, length);
OS.XtFree (address);
OS.XmStringFree (xmString);
return new String (Converter.mbcsToWcs (null, buffer));
}
boolean mnemonicHit () {
return setFocus ();
}
boolean mnemonicMatch (char key) {
char mnemonic = findMnemonic (getText ());
if (mnemonic == '\0') return false;
return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
}
void propagateWidget (boolean enabled) {
super.propagateWidget (enabled);
propagateHandle (enabled, labelHandle);
}
void redrawWidget (int x, int y, int width, int height, boolean all) {
super.redrawWidget (x, y, width, height, all);
short [] root_x = new short [1], root_y = new short [1];
OS.XtTranslateCoords (handle, (short) x, (short) y, root_x, root_y);
short [] label_x = new short [1], label_y = new short [1];
OS.XtTranslateCoords (labelHandle, (short) 0, (short) 0, label_x, label_y);
redrawHandle (root_x [0] - label_x [0], root_y [0] - label_y [0], width, height, labelHandle);
}
void releaseHandle () {
super.releaseHandle ();
labelHandle = 0;
}
/**
* 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) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
byte [] buffer = Converter.wcsToMbcs (null, string, true);
int xmString = OS.XmStringParseText (
buffer,
0,
OS.XmFONTLIST_DEFAULT_TAG,
OS.XmCHARSET_TEXT,
null,
0,
0);
int [] argList = {OS.XmNlabelString, xmString};
OS.XtSetValues (labelHandle, argList, argList.length / 2);
OS.XmStringFree (xmString);
if (string.length () == 0) {
OS.XtUnmanageChild (labelHandle);
} else {
OS.XtManageChild (labelHandle);
}
}
int shadowType () {
if ((style & SWT.SHADOW_IN) != 0) return OS.XmSHADOW_IN;
if ((style & SWT.SHADOW_OUT) != 0) return OS.XmSHADOW_OUT;
if ((style & SWT.SHADOW_ETCHED_IN) != 0) return OS.XmSHADOW_ETCHED_IN;
if ((style & SWT.SHADOW_ETCHED_OUT) != 0) return OS.XmSHADOW_ETCHED_OUT;
return OS.XmSHADOW_ETCHED_IN;
}
}
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