/*******************************************************************************
* Copyright (c) 2000, 2011 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.internal.photon.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class implement rubber banding rectangles that are
* drawn onto a parent <code>Composite</code> or <code>Display</code>.
* These rectangles can be specified to respond to mouse and key events
* by either moving or resizing themselves accordingly. Trackers are
* typically used to represent window geometries in a lightweight manner.
*
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>LEFT, RIGHT, UP, DOWN, RESIZE</dd>
* <dt><b>Events:</b></dt>
* <dd>Move, Resize</dd>
* </dl>
* <p>
* Note: Rectangle move behavior is assumed unless RESIZE is specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#tracker">Tracker snippets</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 Tracker extends Widget {
Composite parent;
boolean tracking, stippled;
Rectangle [] rectangles = new Rectangle [0], proportions = rectangles;
Rectangle bounds;
int resizeCursor;
Cursor clientCursor;
int cursorOrientation = SWT.NONE;
/*
* The following values mirror step sizes on Windows
*/
final static int STEPSIZE_SMALL = 1;
final static int STEPSIZE_LARGE = 9;
/**
* Constructs a new instance of this class given the display
* to create it on 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><p>
* Note: Currently, null can be passed in for the display argument.
* This has the effect of creating the tracker on the currently active
* display if there is one. If there is no current display, the
* tracker is created on a "default" display. <b>Passing in null as
* the display argument is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param display the display to create the tracker on
* @param style the style of control to construct
*
* @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#LEFT
* @see SWT#RIGHT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#RESIZE
*/
public Tracker (Display display, int style) {
if (display == null) display = Display.getCurrent ();
if (display == null) display = Display.getDefault ();
if (!display.isValidThread ()) {
error (SWT.ERROR_THREAD_INVALID_ACCESS);
}
this.style = checkStyle (style);
this.display = display;
reskinWidget ();
}
/**
* 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 widget which will be the parent of the new instance (cannot be null)
* @param style the style of widget 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#LEFT
* @see SWT#RIGHT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#RESIZE
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Tracker (Composite parent, int style) {
super (parent, checkStyle (style));
this.parent = parent;
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is moved or resized, by sending
* it one of the messages defined in the <code>ControlListener</code>
* interface.
*
* @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 ControlListener
* @see #removeControlListener
*/
public void addControlListener(ControlListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Resize, typedListener);
addListener (SWT.Move, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when keys are pressed and released on the system keyboard, by sending
* it one of the messages defined in the <code>KeyListener</code>
* interface.
*
* @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 KeyListener
* @see #removeKeyListener
*/
public void addKeyListener (KeyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.KeyUp,typedListener);
addListener (SWT.KeyDown,typedListener);
}
Point adjustMoveCursor () {
if (bounds == null) return null;
int newX = bounds.x + bounds.width / 2;
int newY = bounds.y;
/*
* Convert to screen coordinates iff needed
*/
if (parent != null) {
short [] x = new short [1], y = new short [1];
OS.PtGetAbsPosition (parent.handle, x, y);
newX += x [0];
newY += y [0];
}
OS.PhMoveCursorAbs(OS.PhInputGroup (0), newX, newY);
return new Point (newX, newY);
}
Point adjustResizeCursor () {
if (bounds == null) return null;
int newX, newY;
if ((cursorOrientation & SWT.LEFT) != 0) {
newX = bounds.x;
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
newX = bounds.x + bounds.width;
} else {
newX = bounds.x + bounds.width / 2;
}
if ((cursorOrientation & SWT.UP) != 0) {
newY = bounds.y;
} else if ((cursorOrientation & SWT.DOWN) != 0) {
newY = bounds.y + bounds.height;
} else {
newY = bounds.y + bounds.height / 2;
}
/*
* Convert to screen coordinates iff needed
*/
if (parent != null) {
short [] x = new short [1], y = new short [1];
OS.PtGetAbsPosition (parent.handle, x, y);
newX += x [0];
newY += y [0];
}
OS.PhMoveCursorAbs(OS.PhInputGroup (0), newX, newY);
/*
* If the client has not provided a custom cursor then determine
* the appropriate resize cursor.
*/
if (clientCursor == null) {
int newCursor = 0;
switch (cursorOrientation) {
case SWT.UP:
newCursor = OS.Ph_CURSOR_DRAG_TOP;
break;
case SWT.DOWN:
newCursor = OS.Ph_CURSOR_DRAG_BOTTOM;
break;
case SWT.LEFT:
newCursor = OS.Ph_CURSOR_DRAG_LEFT;
break;
case SWT.RIGHT:
newCursor = OS.Ph_CURSOR_DRAG_RIGHT;
break;
case SWT.LEFT | SWT.UP:
newCursor = OS.Ph_CURSOR_DRAG_TL;
break;
case SWT.RIGHT | SWT.DOWN:
newCursor = OS.Ph_CURSOR_DRAG_BR;
break;
case SWT.LEFT | SWT.DOWN:
newCursor = OS.Ph_CURSOR_DRAG_BL;
break;
case SWT.RIGHT | SWT.UP:
newCursor = OS.Ph_CURSOR_DRAG_TR;
break;
default:
newCursor = OS.Ph_CURSOR_MOVE;
break;
}
resizeCursor = newCursor;
}
return new Point (newX, newY);
}
static int checkStyle (int style) {
if ((style & (SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN)) == 0) {
style |= SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN;
}
return style;
}
/**
* Stops displaying the tracker rectangles. Note that this is not considered
* to be a cancelation by the user.
*
* @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 close () {
checkWidget();
tracking = false;
}
Rectangle computeBounds () {
if (rectangles.length == 0) return null;
int xMin = rectangles [0].x;
int yMin = rectangles [0].y;
int xMax = rectangles [0].x + rectangles [0].width;
int yMax = rectangles [0].y + rectangles [0].height;
for (int i = 1; i < rectangles.length; i++) {
if (rectangles [i].x < xMin) xMin = rectangles [i].x;
if (rectangles [i].y < yMin) yMin = rectangles [i].y;
int rectRight = rectangles [i].x + rectangles [i].width;
if (rectRight > xMax) xMax = rectRight;
int rectBottom = rectangles [i].y + rectangles [i].height;
if (rectBottom > yMax) yMax = rectBottom;
}
return new Rectangle (xMin, yMin, xMax - xMin, yMax - yMin);
}
Rectangle [] computeProportions (Rectangle [] rects) {
Rectangle [] result = new Rectangle [rects.length];
bounds = computeBounds ();
if (bounds != null) {
for (int i = 0; i < rects.length; i++) {
int x = 0, y = 0, width = 0, height = 0;
if (bounds.width != 0) {
x = (rects [i].x - bounds.x) * 100 / bounds.width;
width = rects [i].width * 100 / bounds.width;
} else {
width = 100;
}
if (bounds.height != 0) {
y = (rects [i].y - bounds.y) * 100 / bounds.height;
height = rects [i].height * 100 / bounds.height;
} else {
height = 100;
}
result [i] = new Rectangle (x, y, width, height);
}
}
return result;
}
void drawRectangles (Rectangle [] rects, boolean stippled) {
int rid = OS.Ph_DEV_RID;
if (parent != null) rid = OS.PtWidgetRid (parent.handle);
int phGC = OS.PgCreateGC (0);
if (phGC == 0) return;
int prevContext = OS.PgSetGC (phGC);
OS.PgSetRegion (rid);
OS.PgSetDrawMode (OS.Pg_DrawModeDSx);
OS.PgSetFillColor (0xffffff);
int bandWidth = 0;
if (stippled) {
bandWidth = 2;
OS.PgSetFillTransPat (OS.Pg_PAT_HALF);
}
for (int i=0; i<rects.length; i++) {
Rectangle r = rects [i];
int x1 = r.x;
int y1 = r.y;
int x2 = r.x + r.width;
int y2 = r.y + r.height;
OS.PgDrawIRect(x1, y1, x2, y1 + bandWidth, OS.Pg_DRAW_FILL);
OS.PgDrawIRect(x1, y1 + bandWidth + 1, x1 + bandWidth, y2 - bandWidth - 1, OS.Pg_DRAW_FILL);
OS.PgDrawIRect(x2 - bandWidth, y1 + bandWidth + 1, x2, y2 - bandWidth - 1, OS.Pg_DRAW_FILL);
OS.PgDrawIRect(x1, y2 - bandWidth, x2, y2, OS.Pg_DRAW_FILL);
}
OS.PgSetGC (prevContext);
OS.PgDestroyGC (phGC);
}
/**
* Returns the bounds that are being drawn, expressed relative to the parent
* widget. If the parent is a <code>Display</code> then these are screen
* coordinates.
*
* @return the bounds of the Rectangles being drawn
*
* @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 Rectangle [] getRectangles () {
checkWidget();
Rectangle [] result = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle current = rectangles [i];
result [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
return result;
}
/**
* Returns <code>true</code> if the rectangles are drawn with a stippled line, <code>false</code> otherwise.
*
* @return the stippled effect of the rectangles
*
* @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 boolean getStippled () {
checkWidget();
return stippled;
}
void moveRectangles (int xChange, int yChange) {
if (bounds == null) return;
if (xChange < 0 && ((style & SWT.LEFT) == 0)) xChange = 0;
if (xChange > 0 && ((style & SWT.RIGHT) == 0)) xChange = 0;
if (yChange < 0 && ((style & SWT.UP) == 0)) yChange = 0;
if (yChange > 0 && ((style & SWT.DOWN) == 0)) yChange = 0;
if (xChange == 0 && yChange == 0) return;
bounds.x += xChange; bounds.y += yChange;
for (int i = 0; i < rectangles.length; i++) {
rectangles [i].x += xChange;
rectangles [i].y += yChange;
}
}
/**
* Displays the Tracker rectangles for manipulation by the user. Returns when
* the user has either finished manipulating the rectangles or has cancelled the
* Tracker.
*
* @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
*
* @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 boolean open () {
checkWidget();
int input_group = OS.PhInputGroup (0);
PhCursorInfo_t info = new PhCursorInfo_t ();
OS.PhQueryCursor ((short)input_group, info);
if ((style & SWT.MENU) == 0) {
/*
* This code is intentionally commented. Tracking can happen through
* the keyboard.
*/
// if ((info.button_state & OS.Ph_BUTTON_SELECT) == 0) return false;
}
int region = 0;
if (info.dragger == 0) {
PhRect_t rect = new PhRect_t ();
OS.PhWindowQueryVisible (OS.Ph_QUERY_CONSOLE, 0, OS.PhInputGroup (0), rect);
int sense = OS.Ph_EV_DRAG | OS.Ph_EV_KEY | OS.Ph_EV_BUT_PRESS |
OS.Ph_EV_BUT_RELEASE | OS.Ph_EV_PTR_MOTION;
int [] args = {
OS.Pt_ARG_WIDTH, rect.lr_x - rect.ul_x + 1, 0,
OS.Pt_ARG_HEIGHT, rect.lr_y - rect.ul_y + 1, 0,
OS.Pt_ARG_REGION_OPAQUE, 0, ~0,
OS.Pt_ARG_REGION_SENSE, sense, ~0,
OS.Pt_ARG_REGION_FLAGS, OS.Ph_FORCE_BOUNDARY, OS.Ph_FORCE_BOUNDARY,
OS.Pt_ARG_FILL_COLOR, OS.Pg_TRANSPARENT, 0,
};
region = OS.PtCreateWidget (OS.PtRegion (), OS.Pt_NO_PARENT, args.length / 3, args);
OS.PtRealizeWidget (region);
rect = new PhRect_t ();
int rid = OS.PtWidgetRid (region);
OS.PhInitDrag (rid, OS.Ph_DRAG_KEY_MOTION | OS.Ph_TRACK_DRAG, rect, null, input_group, null, null, null, null, null);
}
int oldX = info.pos_x, oldY = info.pos_y;
int size = PhEvent_t.sizeof + 1024;
int buffer = OS.malloc (size);
PhEvent_t phEvent = new PhEvent_t ();
Event event = new Event ();
// if exactly one of UP/DOWN is specified as a style then set the cursor
// orientation accordingly (the same is done for LEFT/RIGHT styles below)
int vStyle = style & (SWT.UP | SWT.DOWN);
if (vStyle == SWT.UP || vStyle == SWT.DOWN) {
cursorOrientation |= vStyle;
}
int hStyle = style & (SWT.LEFT | SWT.RIGHT);
if (hStyle == SWT.LEFT || hStyle == SWT.RIGHT) {
cursorOrientation |= hStyle;
}
update ();
drawRectangles (rectangles, stippled);
Point cursorPos = null;
if ((style & SWT.MENU) == 0) {
oldX = info.pos_x;
oldY = info.pos_y;
} else {
if ((style & SWT.RESIZE) != 0) {
cursorPos = adjustResizeCursor ();
} else {
cursorPos = adjustMoveCursor ();
}
if (cursorPos != null) {
oldX = cursorPos.x;
oldY = cursorPos.y;
}
}
tracking = true;
boolean cancelled = false;
while (tracking && !cancelled) {
if (parent != null && parent.isDisposed ()) break;
int result = OS.PhEventNext (buffer, size);
switch (result) {
case OS.Ph_EVENT_MSG: break;
case OS.Ph_RESIZE_MSG:
size = OS.PhGetMsgSize (buffer);
OS.free (buffer);
buffer = OS.malloc (size);
continue;
}
OS.memmove (phEvent, buffer, PhEvent_t.sizeof);
if (phEvent.type == OS.Ph_EV_DRAG) {
switch (phEvent.subtype) {
case OS.Ph_EV_DRAG_MOTION_EVENT: {
int data = OS.PhGetData (buffer);
if (data == 0) break;
PhPointerEvent_t pe = new PhPointerEvent_t ();
OS.memmove (pe, data, PhPointerEvent_t.sizeof);
int newX = pe.pos_x;
int newY = pe.pos_y;
if (newX != oldX || newY != oldY) {
Rectangle [] oldRectangles = rectangles;
boolean oldStippled = stippled;
Rectangle [] rectsToErase = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle current = rectangles [i];
rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
event.x = newX;
event.y = newY;
if ((style & SWT.RESIZE) != 0) {
resizeRectangles (newX - oldX, newY - oldY);
sendEvent (SWT.Resize, event);
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the move
* event. If this happens, return false to indicate
* that the tracking has failed.
*/
if (isDisposed ()) {
cancelled = true;
break;
}
boolean draw = false;
/*
* It is possible that application code could have
* changed the rectangles in the resize event. If this
* happens then only redraw the tracker if the rectangle
* values have changed.
*/
if (rectangles != oldRectangles) {
int length = rectangles.length;
if (length != rectsToErase.length) {
draw = true;
} else {
for (int i = 0; i < length; i++) {
if (!rectangles [i].equals (rectsToErase [i])) {
draw = true;
break;
}
}
}
} else {
draw = true;
}
if (draw) {
drawRectangles (rectsToErase, oldStippled);
update ();
drawRectangles (rectangles, stippled);
}
cursorPos = adjustResizeCursor ();
if (cursorPos != null) {
newX = cursorPos.x;
newY = cursorPos.y;
}
} else {
moveRectangles (newX - oldX, newY - oldY);
sendEvent (SWT.Move, event);
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the move
* event. If this happens, return false to indicate
* that the tracking has failed.
*/
if (isDisposed ()) {
cancelled = true;
break;
}
boolean draw = false;
/*
* It is possible that application code could have
* changed the rectangles in the move event. If this
* happens then only redraw the tracker if the rectangle
* values have changed.
*/
if (rectangles != oldRectangles) {
int length = rectangles.length;
if (length != rectsToErase.length) {
draw = true;
} else {
for (int i = 0; i < length; i++) {
if (!rectangles [i].equals (rectsToErase [i])) {
draw = true;
break;
}
}
}
} else {
draw = true;
}
if (draw) {
drawRectangles (rectsToErase, oldStippled);
update ();
drawRectangles (rectangles, stippled);
}
}
oldX = newX; oldY = newY;
}
break;
}
case OS.Ph_EV_DRAG_KEY_EVENT: {
int data = OS.PhGetData (buffer);
if (data == 0) break;
PhKeyEvent_t ke = new PhKeyEvent_t ();
OS.memmove (ke, data, PhKeyEvent_t.sizeof);
if ((ke.key_flags & OS.Pk_KF_Sym_Valid) != 0) {
int stepSize = (ke.key_mods & OS.Pk_KM_Ctrl) != 0 ? STEPSIZE_SMALL : STEPSIZE_LARGE;
int xChange = 0, yChange = 0;
switch (ke.key_sym) {
case OS.Pk_Escape:
cancelled = true;
tracking = false;
break;
case OS.Pk_Return:
tracking = false;
break;
case OS.Pk_Left:
xChange = -stepSize;
break;
case OS.Pk_Right:
xChange = stepSize;
break;
case OS.Pk_Up:
yChange = -stepSize;
break;
case OS.Pk_Down:
yChange = stepSize;
break;
}
if (xChange != 0 || yChange != 0) {
Rectangle [] oldRectangles = rectangles;
boolean oldStippled = stippled;
Rectangle [] rectsToErase = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle current = rectangles [i];
rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
int newX = oldX + xChange;
int newY = oldY + yChange;
event.x = newX;
event.y = newY;
if ((style & SWT.RESIZE) != 0) {
resizeRectangles (xChange, yChange);
sendEvent (SWT.Resize, event);
/*
* It is possible (but unlikely) that application
* code could have disposed the widget in the move
* event. If this happens return false to indicate
* that the tracking has failed.
*/
if (isDisposed ()) {
cancelled = true;
break;
}
boolean draw = false;
/*
* It is possible that application code could have
* changed the rectangles in the resize event. If this
* happens then only redraw the tracker if the rectangle
* values have changed.
*/
if (rectangles != oldRectangles) {
int length = rectangles.length;
if (length != rectsToErase.length) {
draw = true;
} else {
for (int i = 0; i < length; i++) {
if (!rectangles [i].equals (rectsToErase [i])) {
draw = true;
break;
}
}
}
} else {
draw = true;
}
if (draw) {
drawRectangles (rectsToErase, oldStippled);
update ();
drawRectangles (rectangles, stippled);
}
cursorPos = adjustResizeCursor ();
} else {
moveRectangles (xChange, yChange);
sendEvent (SWT.Move, event);
/*
* It is possible (but unlikely) that application
* code could have disposed the widget in the move
* event. If this happens return false to indicate
* that the tracking has failed.
*/
if (isDisposed ()) {
cancelled = true;
break;
}
boolean draw = false;
/*
* It is possible that application code could have
* changed the rectangles in the move event. If this
* happens then only redraw the tracker if the rectangle
* values have changed.
*/
if (rectangles != oldRectangles) {
int length = rectangles.length;
if (length != rectsToErase.length) {
draw = true;
} else {
for (int i = 0; i < length; i++) {
if (!rectangles [i].equals (rectsToErase [i])) {
draw = true;
break;
}
}
}
} else {
draw = true;
}
if (draw) {
drawRectangles (rectsToErase, oldStippled);
update ();
drawRectangles (rectangles, stippled);
}
cursorPos = adjustMoveCursor ();
}
if (cursorPos != null) {
oldX = cursorPos.x;
oldY = cursorPos.y;
}
}
}
break;
}
case OS.Ph_EV_DRAG_COMPLETE: {
tracking = false;
break;
}
}
if (phEvent.collector_handle != 0) {
setCursor (phEvent.collector_handle);
}
/*
* Don't dispatch mouse and key events in general, EXCEPT once this
* tracker has finished its work.
*/
if (tracking && !cancelled) continue;
}
OS.PtEventHandler (buffer);
}
OS.free (buffer);
if (!isDisposed ()) {
update ();
drawRectangles (rectangles, stippled);
}
tracking = false;
if (region != 0) OS.PtDestroyWidget (region);
return !cancelled;
}
void releaseWidget () {
super.releaseWidget ();
parent = null;
rectangles = proportions = null;
bounds = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is moved or resized.
*
* @param listener the listener which should no longer 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 ControlListener
* @see #addControlListener
*/
public void removeControlListener (ControlListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Resize, listener);
eventTable.unhook (SWT.Move, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when keys are pressed and released on the system keyboard.
*
* @param listener the listener which should no longer 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 KeyListener
* @see #addKeyListener
*/
public void removeKeyListener(KeyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.KeyUp, listener);
eventTable.unhook (SWT.KeyDown, listener);
}
void resizeRectangles (int xChange, int yChange) {
if (bounds == null) return;
/*
* If the cursor orientation has not been set in the orientation of
* this change then try to set it here.
*/
if (xChange < 0 && ((style & SWT.LEFT) != 0) && ((cursorOrientation & SWT.RIGHT) == 0)) {
cursorOrientation |= SWT.LEFT;
}
if (xChange > 0 && ((style & SWT.RIGHT) != 0) && ((cursorOrientation & SWT.LEFT) == 0)) {
cursorOrientation |= SWT.RIGHT;
}
if (yChange < 0 && ((style & SWT.UP) != 0) && ((cursorOrientation & SWT.DOWN) == 0)) {
cursorOrientation |= SWT.UP;
}
if (yChange > 0 && ((style & SWT.DOWN) != 0) && ((cursorOrientation & SWT.UP) == 0)) {
cursorOrientation |= SWT.DOWN;
}
/*
* If the bounds will flip about the x or y axis then apply the adjustment
* up to the axis (ie.- where bounds width/height becomes 0), change the
* cursor's orientation accordingly, and flip each Rectangle's origin (only
* necessary for > 1 Rectangles)
*/
if ((cursorOrientation & SWT.LEFT) != 0) {
if (xChange > bounds.width) {
if ((style & SWT.RIGHT) == 0) return;
cursorOrientation |= SWT.RIGHT;
cursorOrientation &= ~SWT.LEFT;
bounds.x += bounds.width;
xChange -= bounds.width;
bounds.width = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.x = 100 - proportion.x - proportion.width;
}
}
}
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
if (bounds.width < -xChange) {
if ((style & SWT.LEFT) == 0) return;
cursorOrientation |= SWT.LEFT;
cursorOrientation &= ~SWT.RIGHT;
xChange += bounds.width;
bounds.width = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.x = 100 - proportion.x - proportion.width;
}
}
}
}
if ((cursorOrientation & SWT.UP) != 0) {
if (yChange > bounds.height) {
if ((style & SWT.DOWN) == 0) return;
cursorOrientation |= SWT.DOWN;
cursorOrientation &= ~SWT.UP;
bounds.y += bounds.height;
yChange -= bounds.height;
bounds.height = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.y = 100 - proportion.y - proportion.height;
}
}
}
} else if ((cursorOrientation & SWT.DOWN) != 0) {
if (bounds.height < -yChange) {
if ((style & SWT.UP) == 0) return;
cursorOrientation |= SWT.UP;
cursorOrientation &= ~SWT.DOWN;
yChange += bounds.height;
bounds.height = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.y = 100 - proportion.y - proportion.height;
}
}
}
}
// apply the bounds adjustment
if ((cursorOrientation & SWT.LEFT) != 0) {
bounds.x += xChange;
bounds.width -= xChange;
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
bounds.width += xChange;
}
if ((cursorOrientation & SWT.UP) != 0) {
bounds.y += yChange;
bounds.height -= yChange;
} else if ((cursorOrientation & SWT.DOWN) != 0) {
bounds.height += yChange;
}
Rectangle [] newRects = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle proportion = proportions[i];
newRects[i] = new Rectangle (
proportion.x * bounds.width / 100 + bounds.x,
proportion.y * bounds.height / 100 + bounds.y,
proportion.width * bounds.width / 100,
proportion.height * bounds.height / 100);
}
rectangles = newRects;
}
/**
* Sets the <code>Cursor</code> of the Tracker. If this cursor is <code>null</code>
* then the cursor reverts to the default.
*
* @param newCursor the new <code>Cursor</code> to display
*
* @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 setCursor (Cursor cursor) {
checkWidget();
if (cursor != null && cursor.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
clientCursor = cursor;
}
void setCursor (int cursorHandle) {
if (cursorHandle == 0) return;
int type = 0;
int bitmap = 0;
if (clientCursor != null) {
type = clientCursor.type;
bitmap = clientCursor.bitmap;
} else if (resizeCursor != 0) {
type = resizeCursor;
}
int [] args = new int []{
OS.Pt_ARG_CURSOR_TYPE, type, 0,
OS.Pt_ARG_BITMAP_CURSOR, bitmap, 0,
};
OS.PtSetResources (cursorHandle, args.length / 3, args);
/*
* Bug in Photon. For some reason, the widget cursor will
* not change, when the new cursor is a bitmap cursor, if
* the flag Ph_CURSOR_NO_INHERIT is reset. The fix is to reset
* this flag after changing the cursor type to Ph_CURSOR_BITMAP.
*/
if (type == OS.Ph_CURSOR_BITMAP) {
type &= ~OS.Ph_CURSOR_NO_INHERIT;
OS.PtSetResource (cursorHandle, OS.Pt_ARG_CURSOR_TYPE, type, 0);
}
}
/**
* Specifies the rectangles that should be drawn, expressed relative to the parent
* widget. If the parent is a Display then these are screen coordinates.
*
* @param rectangles the bounds of the rectangles to be drawn
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the set of rectangles is null or contains a null rectangle</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 setRectangles (Rectangle [] rectangles) {
checkWidget();
if (rectangles == null) error (SWT.ERROR_NULL_ARGUMENT);
this.rectangles = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle current = rectangles [i];
if (current == null) error (SWT.ERROR_NULL_ARGUMENT);
this.rectangles [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
proportions = computeProportions (rectangles);
}
/**
* Changes the appearance of the line used to draw the rectangles.
*
* @param stippled <code>true</code> if rectangle should appear stippled
*
* @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 setStippled (boolean stippled) {
checkWidget();
this.stippled = stippled;
}
void update () {
if (parent != null) {
if (parent.isDisposed ()) return;
parent.getShell ().update ();
} else {
display.update ();
}
}
}