| package org.eclipse.swt.widgets;
|
|
|
| /*
|
| * (c) Copyright IBM Corp. 2000, 2001.
|
| * All Rights Reserved
|
| */
|
|
|
| import org.eclipse.swt.internal.photon.*;
|
| 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;
|
|
|
| /** |
| * 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));
|
| }
|
|
|
| static int checkStyle (int style) {
|
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
|
| }
|
|
|
| /** |
| * 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);
|
| }
|
|
|
| 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;
|
| Display display = getDisplay ();
|
| int clazz = display.PtContainer;
|
| int parentHandle = parent.handle;
|
| int cursor = ((style & SWT.HORIZONTAL) != 0) ? OS.Ph_CURSOR_DRAG_VERTICAL : OS.Ph_CURSOR_DRAG_HORIZONTAL;
|
| int [] args = {
|
| OS.Pt_ARG_CURSOR_TYPE, cursor, 0,
|
| OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
|
| };
|
| handle = OS.PtCreateWidget (clazz, parentHandle, args.length / 3, args);
|
| if (handle == 0) error (SWT.ERROR_NO_HANDLES);
|
| }
|
|
|
| void drawBand (int x, int y, int width, int height) {
|
| if (parent == null) return;
|
| if (parent.isDisposed ()) return;
|
| int parentHandle = parent.handle;
|
| if (!OS.PtWidgetIsRealized (parentHandle)) return;
|
| int phGC = OS.PgCreateGC (0); // NOTE: PgCreateGC ignores the parameter
|
| if (phGC == 0) return;
|
| int [] args = {OS.Pt_ARG_COLOR, 0, 0, OS.Pt_ARG_FILL_COLOR, 0, 0};
|
| OS.PtGetResources (handle, args.length / 3, args);
|
| int foreground = args [1];
|
| int background = args [4];
|
| int color = foreground ^ ~background;
|
| int prevContext = OS.PgSetGC (phGC);
|
| OS.PgSetRegion (OS.PtWidgetRid (parentHandle));
|
| OS.PgSetDrawMode (OS.Pg_DRAWMODE_XOR);
|
| OS.PgSetFillColor (color);
|
| OS.PgDrawIRect (x, y, x + width - 1, y + height - 1, OS.Pg_DRAW_FILL);
|
| OS.PgSetGC (prevContext);
|
| OS.PgDestroyGC (phGC);
|
| }
|
|
|
| void hookEvents () {
|
| super.hookEvents ();
|
| int windowProc = getDisplay ().windowProc;
|
| OS.PtAddEventHandler (handle, OS.Ph_EV_DRAG, windowProc, SWT.MouseMove);
|
| }
|
|
|
| int processMouse (int info) {
|
| int result = super.processMouse (info);
|
|
|
| if (info == 0) return OS.Pt_END;
|
| PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
|
| OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
|
| if (cbinfo.event == 0) return OS.Pt_END;
|
| PhEvent_t ev = new PhEvent_t ();
|
| OS.memmove (ev, cbinfo.event, PhEvent_t.sizeof);
|
| int data = OS.PhGetData (cbinfo.event);
|
| if (data == 0) return OS.Pt_END;
|
| PhPointerEvent_t pe = new PhPointerEvent_t ();
|
| OS.memmove (pe, data, PhPointerEvent_t.sizeof);
|
| if (pe.buttons != OS.Ph_BUTTON_SELECT) return result;
|
|
|
| int x = pe.pos_x + ev.translation_x;
|
| int y = pe.pos_y + ev.translation_y;
|
| PhArea_t area = new PhArea_t();
|
| OS.PtWidgetArea (handle, area);
|
| Event event = new Event ();
|
| int width = event.width = area.size_w;
|
| int height = event.height = area.size_h;
|
| switch (ev.type) {
|
| case OS.Ph_EV_BUT_PRESS:
|
| PhRect_t rect = new PhRect_t ();
|
| PhPoint_t pos = new PhPoint_t();
|
| pos.x = pe.pos_x;
|
| pos.y = pe.pos_y;
|
| rect.ul_x = rect.lr_x = (short) (pos.x + ev.translation_x);
|
| rect.ul_y = rect.lr_y = (short) (pos.y + ev.translation_y);
|
| int rid = OS.PtWidgetRid (handle);
|
| // int input_group = OS.PhInputGroup (cbinfo.event);
|
| int input_group = OS.PhInputGroup (0);
|
| OS.PhInitDrag (rid, OS.Ph_DRAG_KEY_MOTION | OS.Ph_DRAG_TRACK | OS.Ph_TRACK_DRAG, rect, null, input_group, null, null, null, pos, null);
|
|
|
| /* Compute the banding rectangle */
|
| startX = x;
|
| startY = y;
|
| lastX = area.pos_x;
|
| lastY = area.pos_y;
|
|
|
| /* The event must be sent because doit flag is used */
|
| event.x = lastX; event.y = lastY;
|
| event.detail = SWT.DRAG;
|
|
|
| /*
|
| * It is possible (but unlikely), that application
|
| * code could have disposed the widget in the selection
|
| * event. If this happens, end the processing of the
|
| * Windows message by returning zero as the result of
|
| * the window proc.
|
| */
|
| sendEvent (SWT.Selection, event);
|
| if (isDisposed ()) return OS.Pt_END;
|
|
|
| /* Draw the banding rectangle */
|
| if (event.doit) {
|
| dragging = true;
|
| menuShell ().bringToTop ();
|
| OS.PtFlush ();
|
| drawBand (lastX = event.x, lastY = event.y, width, height);
|
| }
|
| break;
|
| case OS.Ph_EV_BUT_RELEASE:
|
| if (ev.subtype != OS.Ph_EV_RELEASE_PHANTOM) {
|
| return result;
|
| }
|
| /* Compute the banding rectangle */
|
| if (!dragging) return result;
|
| dragging = false;
|
|
|
| /* The event must be sent because doit flag is used */
|
| event.x = lastX; event.y = lastY;
|
| drawBand (lastX, lastY, width, height);
|
| sendEvent (SWT.Selection, event);
|
| // widget could be disposed at this point
|
| break;
|
| case OS.Ph_EV_PTR_MOTION_BUTTON:
|
| case OS.Ph_EV_PTR_MOTION_NOBUTTON:
|
| case OS.Ph_EV_DRAG:
|
| if (ev.subtype != OS.Ph_EV_DRAG_MOTION_EVENT) {
|
| return result;
|
| }
|
| if (!dragging) return result;
|
|
|
| /* Compute the banding rectangle */
|
| x += area.pos_x;
|
| y += area.pos_y;
|
| Rectangle r = parent.getClientArea ();
|
| int clientWidth = r.width;
|
| int clientHeight = r.height;
|
| int newX = lastX, newY = lastY;
|
| if ((style & SWT.VERTICAL) != 0) {
|
| newX = Math.min (Math.max (0, x - startX), clientWidth - width);
|
| } else {
|
| newY = Math.min (Math.max (0, y - startY), clientHeight - height);
|
| }
|
| if ((newX == lastX) && (newY == lastY)) return result;
|
| drawBand (lastX, lastY, width, height);
|
|
|
| /* The event must be sent because doit flag is used */
|
| event.x = newX; event.y = newY;
|
| event.detail = SWT.DRAG;
|
|
|
| /*
|
| * It is possible (but unlikely), that application
|
| * code could have disposed the widget in the selection
|
| * event. If this happens, end the processing of the
|
| * Windows message by returning zero as the result of
|
| * the window proc.
|
| */
|
| sendEvent (SWT.Selection, event);
|
| if (isDisposed ()) return OS.Pt_END;
|
|
|
| /* Draw the banding rectangle */
|
| if (event.doit) {
|
| lastX = event.x; lastY = event.y;
|
| OS.PtFlush ();
|
| drawBand (lastX, lastY, width, height);
|
| }
|
| break;
|
| }
|
| return result;
|
| }
|
|
|
| int processPaint (int damage) {
|
| OS.PtSuperClassDraw (OS.PtContainer (), handle, damage);
|
| sendPaintEvent (damage);
|
| return OS.Pt_CONTINUE;
|
| }
|
| /** |
| * 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);
|
| }
|
|
|
| }
|
