package org.eclipse.swt.widgets; | |
/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved | |
*/ | |
import org.eclipse.swt.internal.motif.*; | |
import org.eclipse.swt.*; | |
import org.eclipse.swt.graphics.*; | |
import org.eclipse.swt.events.*; | |
/** | |
* Instances of the receiver represent a selectable user interface object | |
* that allows the user to drag a rubber banded outline of the sash within | |
* the parent control. | |
* <dl> | |
* <dt><b>Styles:</b></dt> | |
* <dd> HORIZONTAL, VERTICAL</dd> | |
* <dt><b>Events:</b></dt> | |
* <dd>Selection</dd> | |
* </dl> | |
* <p> | |
* IMPORTANT: This class is intended to be subclassed <em>only</em> | |
* within the SWT implementation. | |
* </p> | |
*/ | |
public class Sash extends Control { | |
boolean dragging; | |
int startX, startY, lastX, lastY; | |
int cursor; | |
/** | |
* 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 Sash (Composite parent, int style) { | |
super (parent, checkStyle (style)); | |
} | |
/** | |
* Adds the listener to the collection of listeners who will | |
* be notified when the control is selected, by sending | |
* it one of the messages defined in the <code>SelectionListener</code> | |
* interface. | |
* <p> | |
* When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid. | |
* If the reciever is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>. | |
* <code>widgetDefaultSelected</code> is not called. | |
* </p> | |
* | |
* @param listener the listener which should be notified | |
* | |
* @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> | |
* | |
* @see SelectionListener | |
* @see #removeSelectionListener | |
* @see SelectionEvent | |
*/ | |
public void addSelectionListener(SelectionListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
TypedListener typedListener = new TypedListener(listener); | |
addListener(SWT.Selection,typedListener); | |
addListener(SWT.DefaultSelection,typedListener); | |
} | |
static int checkStyle (int style) { | |
return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); | |
} | |
public Point computeSize (int wHint, int hHint, boolean changed) { | |
checkWidget(); | |
int border = getBorderWidth (); | |
int width = border * 2, height = border * 2; | |
if ((style & SWT.HORIZONTAL) != 0) { | |
width += DEFAULT_WIDTH; height += 3; | |
} else { | |
width += 3; height += DEFAULT_HEIGHT; | |
} | |
if (wHint != SWT.DEFAULT) width = wHint + (border * 2); | |
if (hHint != SWT.DEFAULT) height = hHint + (border * 2); | |
return new Point (width, height); | |
} | |
void createHandle (int index) { | |
state |= HANDLE; | |
int border = (style & SWT.BORDER) != 0 ? 1 : 0; | |
int [] argList = { | |
OS.XmNborderWidth, border, | |
OS.XmNmarginWidth, 0, | |
OS.XmNmarginHeight, 0, | |
OS.XmNresizePolicy, OS.XmRESIZE_NONE, | |
OS.XmNancestorSensitive, 1, | |
OS.XmNtraversalOn, 0, | |
}; | |
int parentHandle = parent.handle; | |
handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2); | |
} | |
void drawBand (int x, int y, int width, int height) { | |
int display = OS.XtDisplay (parent.handle); | |
if (display == 0) return; | |
int window = OS.XtWindow (parent.handle); | |
if (window == 0) return; | |
int [] argList = {OS.XmNforeground, 0, OS.XmNbackground, 0}; | |
OS.XtGetValues (parent.handle, argList, argList.length / 2); | |
int color = argList [1] ^ argList [3]; | |
byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; | |
int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8); | |
int gc = OS.XCreateGC (display, window, 0, null); | |
OS.XSetForeground (display, gc, color); | |
OS.XSetStipple (display, gc, stipplePixmap); | |
OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors); | |
OS.XSetFillStyle (display, gc, OS.FillStippled); | |
OS.XSetFunction (display, gc, OS.GXxor); | |
OS.XFillRectangle (display, window, gc, x, y, width, height); | |
OS.XFreePixmap (display, stipplePixmap); | |
OS.XFreeGC (display, gc); | |
} | |
int processMouseDown (int callData) { | |
super.processMouseDown (callData); | |
XButtonEvent xEvent = new XButtonEvent (); | |
OS.memmove (xEvent, callData, XButtonEvent.sizeof); | |
if (xEvent.button != 1) return 0; | |
startX = xEvent.x; startY = xEvent.y; | |
int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2); | |
lastX = ((short) argList [1]) - border; lastY = ((short) argList [3]) - border; | |
Event event = new Event (); | |
event.detail = SWT.DRAG; | |
event.time = xEvent.time; | |
event.x = lastX; event.y = lastY; | |
event.width = width; event.height = height; | |
sendEvent (SWT.Selection, event); | |
if (event.doit) { | |
dragging = true; | |
OS.XmUpdateDisplay (handle); | |
drawBand (lastX = event.x, lastY = event.y, width, height); | |
} | |
return 0; | |
} | |
int processMouseMove (int callData) { | |
super.processMouseMove (callData); | |
XMotionEvent xEvent = new XMotionEvent (); | |
OS.memmove (xEvent, callData, XMotionEvent.sizeof); | |
if (!dragging || (xEvent.state & OS.Button1Mask) == 0) return 0; | |
int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; | |
OS.XtGetValues (handle, argList1, argList1.length / 2); | |
int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border; | |
int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2); | |
int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; | |
OS.XtGetValues (parent.handle, argList2, argList2.length / 2); | |
int parentBorder = argList2 [5]; | |
int parentWidth = argList2 [1] + (parentBorder * 2); | |
int parentHeight = argList2 [3] + (parentBorder * 2); | |
int newX = lastX, newY = lastY; | |
if ((style & SWT.VERTICAL) != 0) { | |
newX = Math.min (Math.max (0, xEvent.x + x - startX - parentBorder), parentWidth - width); | |
} else { | |
newY = Math.min (Math.max (0, xEvent.y + y - startY - parentBorder), parentHeight - height); | |
} | |
if (newX == lastX && newY == lastY) return 0; | |
drawBand (lastX, lastY, width, height); | |
Event event = new Event (); | |
event.detail = SWT.DRAG; | |
event.time = xEvent.time; | |
event.x = newX; event.y = newY; | |
event.width = width; event.height = height; | |
sendEvent (SWT.Selection, event); | |
if (event.doit) { | |
lastX = event.x; lastY = event.y; | |
OS.XmUpdateDisplay (handle); | |
drawBand (lastX, lastY, width, height); | |
} | |
return 0; | |
} | |
int processMouseUp (int callData) { | |
super.processMouseUp (callData); | |
XButtonEvent xEvent = new XButtonEvent (); | |
OS.memmove (xEvent, callData, XButtonEvent.sizeof); | |
if (xEvent.button != 1) return 0; | |
if (!dragging) return 0; | |
dragging = false; | |
int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int border = argList [5]; | |
int width = argList [1] + (border * 2), height = argList [3] + (border * 2); | |
Event event = new Event (); | |
event.time = xEvent.time; | |
event.x = lastX; event.y = lastY; | |
event.width = width; event.height = height; | |
drawBand (lastX, lastY, width, height); | |
sendEvent (SWT.Selection, event); | |
return 0; | |
} | |
void propagateWidget (boolean enabled) { | |
propagateHandle (enabled, handle); | |
/* | |
* Sashes do not participate in focus traversal. | |
*/ | |
if (enabled) { | |
int [] argList = {OS.XmNtraversalOn, 0}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
} | |
} | |
void realizeChildren () { | |
super.realizeChildren (); | |
int window = OS.XtWindow (handle); | |
if (window == 0) return; | |
int display = OS.XtDisplay (handle); | |
if (display == 0) return; | |
if ((style & SWT.HORIZONTAL) != 0) { | |
cursor = OS.XCreateFontCursor (display, OS.XC_sb_v_double_arrow); | |
} else { | |
cursor = OS.XCreateFontCursor (display, OS.XC_sb_h_double_arrow); | |
} | |
OS.XDefineCursor (display, window, cursor); | |
} | |
void releaseWidget () { | |
super.releaseWidget (); | |
if (cursor != 0) { | |
int display = OS.XtDisplay (handle); | |
if (display != 0) OS.XFreeCursor (display, cursor); | |
} | |
cursor = 0; | |
} | |
/** | |
* Removes the listener from the collection of listeners who will | |
* be notified when the control is selected. | |
* | |
* @param listener the listener which should be notified | |
* | |
* @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> | |
* | |
* @see SelectionListener | |
* @see #addSelectionListener | |
*/ | |
public void removeSelectionListener(SelectionListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook(SWT.Selection, listener); | |
eventTable.unhook(SWT.DefaultSelection,listener); | |
} | |
} |