| 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.*; |
| 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 originX, originY; |
| int lastX, lastY; /* relative to the receiver, not the parent */ |
| 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)); |
| } |
| |
| void createHandle (int index) { |
| state |= HANDLE; |
| handle = OS.gtk_drawing_area_new(); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| int parentHandle = parent.parentingHandle (); |
| OS.gtk_container_add (parentHandle, handle); |
| OS.gtk_widget_show (handle); |
| int type = (style & SWT.VERTICAL) != 0 ? OS.GDK_SB_H_DOUBLE_ARROW:OS.GDK_SB_V_DOUBLE_ARROW; |
| cursor = OS.gdk_cursor_new (type); |
| OS.gtk_widget_realize (handle); |
| int window = OS.GTK_WIDGET_WINDOW (handle); |
| OS.gdk_window_set_cursor (window, cursor); |
| } |
| |
| 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); |
| } |
| |
| /** |
| * 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.MouseDoubleClick,typedListener); |
| } |
| |
| /** |
| * 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.MouseDoubleClick,listener); |
| } |
| |
| int processMouseDown (int callData, int arg1, int int2) { |
| super.processMouseDown (callData,arg1,int2); |
| if (OS.gdk_event_button_get_button(callData) != 1) return 0; |
| |
| originX = OS.GTK_WIDGET_X(handle); |
| originY = OS.GTK_WIDGET_Y(handle); |
| lastX = 0; |
| lastY = 0; |
| |
| /* The event must be sent because its doit flag is used. */ |
| Event event = new Event (); |
| event.detail = SWT.DRAG; |
| event.time = OS.gdk_event_get_time(callData); |
| event.x = originX; |
| event.y = originY; |
| event.width = OS.GTK_WIDGET_WIDTH (handle); |
| event.height = OS.GTK_WIDGET_HEIGHT (handle); |
| /* |
| * It is possible (but unlikely) that client code could have disposed |
| * the widget in the selection event. If this happens end the processing |
| * of this message by returning. |
| */ |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return 0; |
| if (event.doit) { |
| dragging = true; |
| drawBand (originX, originY, event.width, event.height); |
| } |
| return 0; |
| } |
| |
| int processMouseMove (int callData, int arg1, int int2) { |
| super.processMouseMove (callData, arg1, int2); |
| if (!dragging) return 0; |
| |
| /* Get the coordinates where the event happened, relative to the receiver */ |
| double[] px = new double[1]; |
| double[] py = new double[1]; |
| OS.gdk_event_get_coords(callData, px, py); |
| int x = (int)(px[0]); |
| int y = (int)(py[0]); |
| |
| int width = OS.GTK_WIDGET_WIDTH(handle); |
| int height = OS.GTK_WIDGET_HEIGHT(handle); |
| |
| if ((style & SWT.VERTICAL) != 0) { |
| /* Erase the old one */ |
| int oldDrawX = originX + lastX; |
| drawBand(oldDrawX, originY, width, height); |
| /* Draw the new */ |
| int drawX = originX + x; |
| drawBand(drawX, originY, width, height); |
| lastX = x; |
| } else { |
| /* Erase the old one */ |
| int oldDrawY = originY + lastY; |
| drawBand(originX, oldDrawY, width, height); |
| /* Draw the new */ |
| int drawY = originY + y; |
| drawBand(originX, drawY, width, height); |
| lastY = y; |
| } |
| return 0; |
| } |
| |
| int processMouseUp (int callData, int arg1, int int2) { |
| super.processMouseUp(callData, arg1,int2); |
| int button = OS.gdk_event_button_get_button(callData); |
| if (button != 1) return 0; |
| if (!dragging) return 0; |
| int width = OS.GTK_WIDGET_WIDTH(handle); |
| int height = OS.GTK_WIDGET_HEIGHT(handle); |
| int x = lastX + originX; |
| int y = lastY + originY; |
| drawBand(x, y, width, height); |
| dragging = false; |
| |
| Event event = new Event (); |
| event.time = OS.gdk_event_get_time(callData); |
| event.x = x; event.y = y; |
| event.width = width; event.height = height; |
| sendEvent (SWT.Selection, event); |
| return 0; |
| } |
| |
| int processMouseEnter (int callData, int arg1, int int2) { |
| int width = OS.GTK_WIDGET_WIDTH (handle); |
| int height = OS.GTK_WIDGET_HEIGHT (handle); |
| lastX = OS.GTK_WIDGET_X(handle); lastY = OS.GTK_WIDGET_Y(handle); |
| Event event = new Event (); |
| event.time = OS.gdk_event_get_time(callData); |
| event.detail = SWT.DRAG; |
| event.x = lastX; event.y = lastY; |
| event.width = width; event.height = height; |
| Cursor arrowCursor; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| arrowCursor = new Cursor(parent.getDisplay(), SWT.CURSOR_SIZENS); |
| } else { |
| arrowCursor = new Cursor(parent.getDisplay(), SWT.CURSOR_SIZEWE); |
| } |
| setCursor(arrowCursor); |
| sendEvent (SWT.Selection, event); |
| return 0; |
| } |
| |
| int processMouseExit (int callData, int arg1, int int2) { |
| int width = OS.GTK_WIDGET_WIDTH (handle); |
| int height = OS.GTK_WIDGET_HEIGHT (handle); |
| Event event = new Event (); |
| event.time = OS.gdk_event_get_time(callData); |
| event.x = lastX; event.y = lastY; |
| event.width = width; event.height = height; |
| sendEvent (SWT.MouseExit, event); |
| return 0; |
| |
| } |
| |
| void drawBand (int x, int y, int width, int height) { |
| Display display= parent.getDisplay (); |
| if (display == null) return; |
| int window = OS.GTK_WIDGET_WINDOW(parent.paintHandle()); |
| if (window == 0) return; |
| byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; |
| int stipplePixmap = OS.gdk_bitmap_create_from_data (window, bits, 8, 8); |
| int gc = OS.gdk_gc_new(window); |
| Color color = getDisplay().getSystemColor(SWT.COLOR_WHITE); |
| OS.gdk_gc_set_foreground(gc, color.handle); |
| OS.gdk_gc_set_stipple(gc, stipplePixmap); |
| OS.gdk_gc_set_subwindow(gc, OS.GDK_INCLUDE_INFERIORS); |
| OS.gdk_gc_set_fill(gc, OS.GDK_STIPPLED); |
| OS.gdk_gc_set_function(gc, OS.GDK_XOR); |
| OS.gdk_draw_rectangle(window, gc, 1, x, y, width, height); |
| OS.g_object_unref(stipplePixmap); |
| OS.g_object_unref(gc); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| if (cursor != 0) OS.gdk_cursor_destroy (cursor); |
| cursor = 0; |
| } |
| |
| } |